Model loading and texturing

thirdparty/assimp/code/FBX/FBXAnimation.cpp

@@ -0,0 +1,305 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXAnimation.cpp
+ *  @brief Assimp::FBX::AnimationCurve, Assimp::FBX::AnimationCurveNode,
+ *         Assimp::FBX::AnimationLayer, Assimp::FBX::AnimationStack
+ */
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+#include "FBXParser.h"
+#include "FBXDocument.h"
+#include "FBXImporter.h"
+#include "FBXDocumentUtil.h"
+
+namespace Assimp {
+namespace FBX {
+
+using namespace Util;
+
+// ------------------------------------------------------------------------------------------------
+AnimationCurve::AnimationCurve(uint64_t id, const Element& element, const std::string& name, const Document& /*doc*/)
+: Object(id, element, name)
+{
+    const Scope& sc = GetRequiredScope(element);
+    const Element& KeyTime = GetRequiredElement(sc,"KeyTime");
+    const Element& KeyValueFloat = GetRequiredElement(sc,"KeyValueFloat");
+
+    ParseVectorDataArray(keys, KeyTime);
+    ParseVectorDataArray(values, KeyValueFloat);
+
+    if(keys.size() != values.size()) {
+        DOMError("the number of key times does not match the number of keyframe values",&KeyTime);
+    }
+
+    // check if the key times are well-ordered
+    if(!std::equal(keys.begin(), keys.end() - 1, keys.begin() + 1, std::less<KeyTimeList::value_type>())) {
+        DOMError("the keyframes are not in ascending order",&KeyTime);
+    }
+
+    const Element* KeyAttrDataFloat = sc["KeyAttrDataFloat"];
+    if(KeyAttrDataFloat) {
+        ParseVectorDataArray(attributes, *KeyAttrDataFloat);
+    }
+
+    const Element* KeyAttrFlags = sc["KeyAttrFlags"];
+    if(KeyAttrFlags) {
+        ParseVectorDataArray(flags, *KeyAttrFlags);
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+AnimationCurve::~AnimationCurve()
+{
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+AnimationCurveNode::AnimationCurveNode(uint64_t id, const Element& element, const std::string& name, 
+        const Document& doc, const char* const * target_prop_whitelist /*= NULL*/, 
+        size_t whitelist_size /*= 0*/)
+: Object(id, element, name)
+, target()
+, doc(doc)
+{
+    const Scope& sc = GetRequiredScope(element);
+
+    // find target node
+    const char* whitelist[] = {"Model","NodeAttribute","Deformer"};
+    const std::vector<const Connection*>& conns = doc.GetConnectionsBySourceSequenced(ID(),whitelist,3);
+
+    for(const Connection* con : conns) {
+
+        // link should go for a property
+        if (!con->PropertyName().length()) {
+            continue;
+        }
+
+        if(target_prop_whitelist) {
+            const char* const s = con->PropertyName().c_str();
+            bool ok = false;
+            for (size_t i = 0; i < whitelist_size; ++i) {
+                if (!strcmp(s, target_prop_whitelist[i])) {
+                    ok = true;
+                    break;
+                }
+            }
+
+            if (!ok) {
+                throw std::range_error("AnimationCurveNode target property is not in whitelist");
+            }
+        }
+
+        const Object* const ob = con->DestinationObject();
+        if(!ob) {
+            DOMWarning("failed to read destination object for AnimationCurveNode->Model link, ignoring",&element);
+            continue;
+        }
+
+        // XXX support constraints as DOM class
+        //ai_assert(dynamic_cast<const Model*>(ob) || dynamic_cast<const NodeAttribute*>(ob));
+        target = ob;
+        if(!target) {
+            continue;
+        }
+
+        prop = con->PropertyName();
+        break;
+    }
+
+    if(!target) {
+        DOMWarning("failed to resolve target Model/NodeAttribute/Constraint for AnimationCurveNode",&element);
+    }
+
+    props = GetPropertyTable(doc,"AnimationCurveNode.FbxAnimCurveNode",element,sc,false);
+}
+
+// ------------------------------------------------------------------------------------------------
+AnimationCurveNode::~AnimationCurveNode()
+{
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+const AnimationCurveMap& AnimationCurveNode::Curves() const
+{
+    if ( curves.empty() ) {
+        // resolve attached animation curves
+        const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(),"AnimationCurve");
+
+        for(const Connection* con : conns) {
+
+            // link should go for a property
+            if (!con->PropertyName().length()) {
+                continue;
+            }
+
+            const Object* const ob = con->SourceObject();
+            if(!ob) {
+                DOMWarning("failed to read source object for AnimationCurve->AnimationCurveNode link, ignoring",&element);
+                continue;
+            }
+
+            const AnimationCurve* const anim = dynamic_cast<const AnimationCurve*>(ob);
+            if(!anim) {
+                DOMWarning("source object for ->AnimationCurveNode link is not an AnimationCurve",&element);
+                continue;
+            }
+
+            curves[con->PropertyName()] = anim;
+        }
+    }
+
+    return curves;
+}
+
+// ------------------------------------------------------------------------------------------------
+AnimationLayer::AnimationLayer(uint64_t id, const Element& element, const std::string& name, const Document& doc)
+: Object(id, element, name)
+, doc(doc)
+{
+    const Scope& sc = GetRequiredScope(element);
+
+    // note: the props table here bears little importance and is usually absent
+    props = GetPropertyTable(doc,"AnimationLayer.FbxAnimLayer",element,sc, true);
+}
+
+// ------------------------------------------------------------------------------------------------
+AnimationLayer::~AnimationLayer()
+{
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+AnimationCurveNodeList AnimationLayer::Nodes(const char* const * target_prop_whitelist /*= NULL*/,
+    size_t whitelist_size /*= 0*/) const
+{
+    AnimationCurveNodeList nodes;
+
+    // resolve attached animation nodes
+    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(),"AnimationCurveNode");
+    nodes.reserve(conns.size());
+
+    for(const Connection* con : conns) {
+
+        // link should not go to a property
+        if (con->PropertyName().length()) {
+            continue;
+        }
+
+        const Object* const ob = con->SourceObject();
+        if(!ob) {
+            DOMWarning("failed to read source object for AnimationCurveNode->AnimationLayer link, ignoring",&element);
+            continue;
+        }
+
+        const AnimationCurveNode* const anim = dynamic_cast<const AnimationCurveNode*>(ob);
+        if(!anim) {
+            DOMWarning("source object for ->AnimationLayer link is not an AnimationCurveNode",&element);
+            continue;
+        }
+
+        if(target_prop_whitelist) {
+            const char* s = anim->TargetProperty().c_str();
+            bool ok = false;
+            for (size_t i = 0; i < whitelist_size; ++i) {
+                if (!strcmp(s, target_prop_whitelist[i])) {
+                    ok = true;
+                    break;
+                }
+            }
+            if(!ok) {
+                continue;
+            }
+        }
+        nodes.push_back(anim);
+    }
+
+    return nodes; // pray for NRVO
+}
+
+// ------------------------------------------------------------------------------------------------
+AnimationStack::AnimationStack(uint64_t id, const Element& element, const std::string& name, const Document& doc)
+: Object(id, element, name)
+{
+    const Scope& sc = GetRequiredScope(element);
+
+    // note: we don't currently use any of these properties so we shouldn't bother if it is missing
+    props = GetPropertyTable(doc,"AnimationStack.FbxAnimStack",element,sc, true);
+
+    // resolve attached animation layers
+    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(),"AnimationLayer");
+    layers.reserve(conns.size());
+
+    for(const Connection* con : conns) {
+
+        // link should not go to a property
+        if (con->PropertyName().length()) {
+            continue;
+        }
+
+        const Object* const ob = con->SourceObject();
+        if(!ob) {
+            DOMWarning("failed to read source object for AnimationLayer->AnimationStack link, ignoring",&element);
+            continue;
+        }
+
+        const AnimationLayer* const anim = dynamic_cast<const AnimationLayer*>(ob);
+        if(!anim) {
+            DOMWarning("source object for ->AnimationStack link is not an AnimationLayer",&element);
+            continue;
+        }
+        layers.push_back(anim);
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+AnimationStack::~AnimationStack()
+{
+    // empty
+}
+
+} //!FBX
+} //!Assimp
+
+#endif // ASSIMP_BUILD_NO_FBX_IMPORTER

thirdparty/assimp/code/FBX/FBXBinaryTokenizer.cpp

@@ -0,0 +1,466 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+/** @file  FBXBinaryTokenizer.cpp
+ *  @brief Implementation of a fake lexer for binary fbx files -
+ *    we emit tokens so the parser needs almost no special handling
+ *    for binary files.
+ */
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+#include "FBXTokenizer.h"
+#include "FBXUtil.h"
+#include <assimp/defs.h>
+#include <stdint.h>
+#include <assimp/Exceptional.h>
+#include <assimp/ByteSwapper.h>
+
+namespace Assimp {
+namespace FBX {
+
+//enum Flag
+//{
+//   e_unknown_0 = 1 << 0,
+//   e_unknown_1 = 1 << 1,
+//   e_unknown_2 = 1 << 2,
+//   e_unknown_3 = 1 << 3,
+//   e_unknown_4 = 1 << 4,
+//   e_unknown_5 = 1 << 5,
+//   e_unknown_6 = 1 << 6,
+//   e_unknown_7 = 1 << 7,
+//   e_unknown_8 = 1 << 8,
+//   e_unknown_9 = 1 << 9,
+//   e_unknown_10 = 1 << 10,
+//   e_unknown_11 = 1 << 11,
+//   e_unknown_12 = 1 << 12,
+//   e_unknown_13 = 1 << 13,
+//   e_unknown_14 = 1 << 14,
+//   e_unknown_15 = 1 << 15,
+//   e_unknown_16 = 1 << 16,
+//   e_unknown_17 = 1 << 17,
+//   e_unknown_18 = 1 << 18,
+//   e_unknown_19 = 1 << 19,
+//   e_unknown_20 = 1 << 20,
+//   e_unknown_21 = 1 << 21,
+//   e_unknown_22 = 1 << 22,
+//   e_unknown_23 = 1 << 23,
+//   e_flag_field_size_64_bit = 1 << 24, // Not sure what is
+//   e_unknown_25 = 1 << 25,
+//   e_unknown_26 = 1 << 26,
+//   e_unknown_27 = 1 << 27,
+//   e_unknown_28 = 1 << 28,
+//   e_unknown_29 = 1 << 29,
+//   e_unknown_30 = 1 << 30,
+//   e_unknown_31 = 1 << 31
+//};
+//
+//bool check_flag(uint32_t flags, Flag to_check)
+//{
+//	return (flags & to_check) != 0;
+//}
+// ------------------------------------------------------------------------------------------------
+Token::Token(const char* sbegin, const char* send, TokenType type, size_t offset)
+    :
+    #ifdef DEBUG
+    contents(sbegin, static_cast<size_t>(send-sbegin)),
+    #endif
+    sbegin(sbegin)
+    , send(send)
+    , type(type)
+    , line(offset)
+    , column(BINARY_MARKER)
+{
+    ai_assert(sbegin);
+    ai_assert(send);
+
+    // binary tokens may have zero length because they are sometimes dummies
+    // inserted by TokenizeBinary()
+    ai_assert(send >= sbegin);
+}
+
+
+namespace {
+
+// ------------------------------------------------------------------------------------------------
+// signal tokenization error, this is always unrecoverable. Throws DeadlyImportError.
+AI_WONT_RETURN void TokenizeError(const std::string& message, size_t offset) AI_WONT_RETURN_SUFFIX;
+AI_WONT_RETURN void TokenizeError(const std::string& message, size_t offset)
+{
+    throw DeadlyImportError(Util::AddOffset("FBX-Tokenize",message,offset));
+}
+
+
+// ------------------------------------------------------------------------------------------------
+size_t Offset(const char* begin, const char* cursor) {
+    ai_assert(begin <= cursor);
+
+    return cursor - begin;
+}
+
+// ------------------------------------------------------------------------------------------------
+void TokenizeError(const std::string& message, const char* begin, const char* cursor) {
+    TokenizeError(message, Offset(begin, cursor));
+}
+
+// ------------------------------------------------------------------------------------------------
+uint32_t ReadWord(const char* input, const char*& cursor, const char* end) {
+    const size_t k_to_read = sizeof( uint32_t );
+    if(Offset(cursor, end) < k_to_read ) {
+        TokenizeError("cannot ReadWord, out of bounds",input, cursor);
+    }
+
+    uint32_t word;
+    ::memcpy(&word, cursor, 4);
+    AI_SWAP4(word);
+
+    cursor += k_to_read;
+
+    return word;
+}
+
+// ------------------------------------------------------------------------------------------------
+uint64_t ReadDoubleWord(const char* input, const char*& cursor, const char* end) {
+    const size_t k_to_read = sizeof(uint64_t);
+    if(Offset(cursor, end) < k_to_read) {
+        TokenizeError("cannot ReadDoubleWord, out of bounds",input, cursor);
+    }
+
+    uint64_t dword /*= *reinterpret_cast<const uint64_t*>(cursor)*/;
+    ::memcpy( &dword, cursor, sizeof( uint64_t ) );
+    AI_SWAP8(dword);
+
+    cursor += k_to_read;
+
+    return dword;
+}
+
+// ------------------------------------------------------------------------------------------------
+uint8_t ReadByte(const char* input, const char*& cursor, const char* end) {
+    if(Offset(cursor, end) < sizeof( uint8_t ) ) {
+        TokenizeError("cannot ReadByte, out of bounds",input, cursor);
+    }
+
+    uint8_t word;/* = *reinterpret_cast< const uint8_t* >( cursor )*/
+    ::memcpy( &word, cursor, sizeof( uint8_t ) );
+    ++cursor;
+
+    return word;
+}
+
+// ------------------------------------------------------------------------------------------------
+unsigned int ReadString(const char*& sbegin_out, const char*& send_out, const char* input,
+        const char*& cursor, const char* end, bool long_length = false, bool allow_null = false) {
+    const uint32_t len_len = long_length ? 4 : 1;
+    if(Offset(cursor, end) < len_len) {
+        TokenizeError("cannot ReadString, out of bounds reading length",input, cursor);
+    }
+
+    const uint32_t length = long_length ? ReadWord(input, cursor, end) : ReadByte(input, cursor, end);
+
+    if (Offset(cursor, end) < length) {
+        TokenizeError("cannot ReadString, length is out of bounds",input, cursor);
+    }
+
+    sbegin_out = cursor;
+    cursor += length;
+
+    send_out = cursor;
+
+    if(!allow_null) {
+        for (unsigned int i = 0; i < length; ++i) {
+            if(sbegin_out[i] == '\0') {
+                TokenizeError("failed ReadString, unexpected NUL character in string",input, cursor);
+            }
+        }
+    }
+
+    return length;
+}
+
+// ------------------------------------------------------------------------------------------------
+void ReadData(const char*& sbegin_out, const char*& send_out, const char* input, const char*& cursor, const char* end) {
+    if(Offset(cursor, end) < 1) {
+        TokenizeError("cannot ReadData, out of bounds reading length",input, cursor);
+    }
+
+    const char type = *cursor;
+    sbegin_out = cursor++;
+
+    switch(type)
+    {
+        // 16 bit int
+    case 'Y':
+        cursor += 2;
+        break;
+
+        // 1 bit bool flag (yes/no)
+    case 'C':
+        cursor += 1;
+        break;
+
+        // 32 bit int
+    case 'I':
+        // <- fall through
+
+        // float
+    case 'F':
+        cursor += 4;
+        break;
+
+        // double
+    case 'D':
+        cursor += 8;
+        break;
+
+        // 64 bit int
+    case 'L':
+        cursor += 8;
+        break;
+
+        // note: do not write cursor += ReadWord(...cursor) as this would be UB
+
+        // raw binary data
+    case 'R':
+    {
+        const uint32_t length = ReadWord(input, cursor, end);
+        cursor += length;
+        break;
+    }
+
+    case 'b':
+        // TODO: what is the 'b' type code? Right now we just skip over it /
+        // take the full range we could get
+        cursor = end;
+        break;
+
+        // array of *
+    case 'f':
+    case 'd':
+    case 'l':
+    case 'i':
+    case 'c':   {
+        const uint32_t length = ReadWord(input, cursor, end);
+        const uint32_t encoding = ReadWord(input, cursor, end);
+
+        const uint32_t comp_len = ReadWord(input, cursor, end);
+
+        // compute length based on type and check against the stored value
+        if(encoding == 0) {
+            uint32_t stride = 0;
+            switch(type)
+            {
+            case 'f':
+            case 'i':
+                stride = 4;
+                break;
+
+            case 'd':
+            case 'l':
+                stride = 8;
+                break;
+
+            case 'c':
+                stride = 1;
+                break;
+
+            default:
+                ai_assert(false);
+            };
+            ai_assert(stride > 0);
+            if(length * stride != comp_len) {
+                TokenizeError("cannot ReadData, calculated data stride differs from what the file claims",input, cursor);
+            }
+        }
+        // zip/deflate algorithm (encoding==1)? take given length. anything else? die
+        else if (encoding != 1) {
+            TokenizeError("cannot ReadData, unknown encoding",input, cursor);
+        }
+        cursor += comp_len;
+        break;
+    }
+
+        // string
+    case 'S': {
+        const char* sb, *se;
+        // 0 characters can legally happen in such strings
+        ReadString(sb, se, input, cursor, end, true, true);
+        break;
+    }
+    default:
+        TokenizeError("cannot ReadData, unexpected type code: " + std::string(&type, 1),input, cursor);
+    }
+
+    if(cursor > end) {
+        TokenizeError("cannot ReadData, the remaining size is too small for the data type: " + std::string(&type, 1),input, cursor);
+    }
+
+    // the type code is contained in the returned range
+    send_out = cursor;
+}
+
+
+// ------------------------------------------------------------------------------------------------
+bool ReadScope(TokenList& output_tokens, const char* input, const char*& cursor, const char* end, bool const is64bits)
+{
+    // the first word contains the offset at which this block ends
+	const uint64_t end_offset = is64bits ? ReadDoubleWord(input, cursor, end) : ReadWord(input, cursor, end);
+
+    // we may get 0 if reading reached the end of the file -
+    // fbx files have a mysterious extra footer which I don't know
+    // how to extract any information from, but at least it always
+    // starts with a 0.
+    if(!end_offset) {
+        return false;
+    }
+
+    if(end_offset > Offset(input, end)) {
+        TokenizeError("block offset is out of range",input, cursor);
+    }
+    else if(end_offset < Offset(input, cursor)) {
+        TokenizeError("block offset is negative out of range",input, cursor);
+    }
+
+    // the second data word contains the number of properties in the scope
+	const uint64_t prop_count = is64bits ? ReadDoubleWord(input, cursor, end) : ReadWord(input, cursor, end);
+
+    // the third data word contains the length of the property list
+	const uint64_t prop_length = is64bits ? ReadDoubleWord(input, cursor, end) : ReadWord(input, cursor, end);
+
+    // now comes the name of the scope/key
+    const char* sbeg, *send;
+    ReadString(sbeg, send, input, cursor, end);
+
+    output_tokens.push_back(new_Token(sbeg, send, TokenType_KEY, Offset(input, cursor) ));
+
+    // now come the individual properties
+    const char* begin_cursor = cursor;
+    for (unsigned int i = 0; i < prop_count; ++i) {
+        ReadData(sbeg, send, input, cursor, begin_cursor + prop_length);
+
+        output_tokens.push_back(new_Token(sbeg, send, TokenType_DATA, Offset(input, cursor) ));
+
+        if(i != prop_count-1) {
+            output_tokens.push_back(new_Token(cursor, cursor + 1, TokenType_COMMA, Offset(input, cursor) ));
+        }
+    }
+
+    if (Offset(begin_cursor, cursor) != prop_length) {
+        TokenizeError("property length not reached, something is wrong",input, cursor);
+    }
+
+    // at the end of each nested block, there is a NUL record to indicate
+    // that the sub-scope exists (i.e. to distinguish between P: and P : {})
+    // this NUL record is 13 bytes long on 32 bit version and 25 bytes long on 64 bit.
+	const size_t sentinel_block_length = is64bits ? (sizeof(uint64_t)* 3 + 1) : (sizeof(uint32_t)* 3 + 1);
+
+    if (Offset(input, cursor) < end_offset) {
+        if (end_offset - Offset(input, cursor) < sentinel_block_length) {
+            TokenizeError("insufficient padding bytes at block end",input, cursor);
+        }
+
+        output_tokens.push_back(new_Token(cursor, cursor + 1, TokenType_OPEN_BRACKET, Offset(input, cursor) ));
+
+        // XXX this is vulnerable to stack overflowing ..
+        while(Offset(input, cursor) < end_offset - sentinel_block_length) {
+			ReadScope(output_tokens, input, cursor, input + end_offset - sentinel_block_length, is64bits);
+        }
+        output_tokens.push_back(new_Token(cursor, cursor + 1, TokenType_CLOSE_BRACKET, Offset(input, cursor) ));
+
+        for (unsigned int i = 0; i < sentinel_block_length; ++i) {
+            if(cursor[i] != '\0') {
+                TokenizeError("failed to read nested block sentinel, expected all bytes to be 0",input, cursor);
+            }
+        }
+        cursor += sentinel_block_length;
+    }
+
+    if (Offset(input, cursor) != end_offset) {
+        TokenizeError("scope length not reached, something is wrong",input, cursor);
+    }
+
+    return true;
+}
+
+} // anonymous namespace
+
+// ------------------------------------------------------------------------------------------------
+// TODO: Test FBX Binary files newer than the 7500 version to check if the 64 bits address behaviour is consistent
+void TokenizeBinary(TokenList& output_tokens, const char* input, size_t length)
+{
+    ai_assert(input);
+
+    if(length < 0x1b) {
+        TokenizeError("file is too short",0);
+    }
+
+    //uint32_t offset = 0x15;
+/*    const char* cursor = input + 0x15;
+
+    const uint32_t flags = ReadWord(input, cursor, input + length);
+
+    const uint8_t padding_0 = ReadByte(input, cursor, input + length); // unused
+    const uint8_t padding_1 = ReadByte(input, cursor, input + length); // unused*/
+
+    if (strncmp(input,"Kaydara FBX Binary",18)) {
+        TokenizeError("magic bytes not found",0);
+    }
+
+    const char* cursor = input + 18;
+	/*Result ignored*/ ReadByte(input, cursor, input + length);
+	/*Result ignored*/ ReadByte(input, cursor, input + length);
+	/*Result ignored*/ ReadByte(input, cursor, input + length);
+	/*Result ignored*/ ReadByte(input, cursor, input + length);
+	/*Result ignored*/ ReadByte(input, cursor, input + length);
+	const uint32_t version = ReadWord(input, cursor, input + length);
+	const bool is64bits = version >= 7500;
+    const char *end = input + length;
+    while (cursor < end ) {
+		if (!ReadScope(output_tokens, input, cursor, input + length, is64bits)) {
+            break;
+        }
+    }
+}
+
+} // !FBX
+} // !Assimp
+
+#endif

thirdparty/assimp/code/FBX/FBXCommon.h

@@ -0,0 +1,86 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file FBXCommon.h
+* Some useful constants and enums for dealing with FBX files.
+*/
+#ifndef AI_FBXCOMMON_H_INC
+#define AI_FBXCOMMON_H_INC
+
+#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
+
+namespace Assimp {
+namespace FBX
+{
+    const std::string NULL_RECORD = { // 13 null bytes
+        '\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0','\0'
+    }; // who knows why
+    const std::string SEPARATOR = {'\x00', '\x01'}; // for use inside strings
+    const std::string MAGIC_NODE_TAG = "_$AssimpFbx$"; // from import
+    const int64_t SECOND = 46186158000; // FBX's kTime unit
+
+    // rotation order. We'll probably use EulerXYZ for everything
+    enum RotOrder {
+        RotOrder_EulerXYZ = 0,
+        RotOrder_EulerXZY,
+        RotOrder_EulerYZX,
+        RotOrder_EulerYXZ,
+        RotOrder_EulerZXY,
+        RotOrder_EulerZYX,
+
+        RotOrder_SphericXYZ,
+
+        RotOrder_MAX // end-of-enum sentinel
+    };
+
+    // transformation inheritance method. Most of the time RSrs
+    enum TransformInheritance {
+        TransformInheritance_RrSs = 0,
+        TransformInheritance_RSrs,
+        TransformInheritance_Rrs,
+
+        TransformInheritance_MAX // end-of-enum sentinel
+    };
+}
+}
+#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
+
+#endif // AI_FBXCOMMON_H_INC

thirdparty/assimp/code/FBX/FBXCompileConfig.h

@@ -0,0 +1,70 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXCompileConfig.h
+ *  @brief FBX importer compile-time switches
+ */
+#ifndef INCLUDED_AI_FBX_COMPILECONFIG_H
+#define INCLUDED_AI_FBX_COMPILECONFIG_H
+
+#include <map>
+
+//
+#if _MSC_VER > 1500 || (defined __GNUC___)
+#   define ASSIMP_FBX_USE_UNORDERED_MULTIMAP
+#   else
+#   define fbx_unordered_map map
+#   define fbx_unordered_multimap multimap
+#endif
+
+#ifdef ASSIMP_FBX_USE_UNORDERED_MULTIMAP
+#   include <unordered_map>
+#   if _MSC_VER > 1600
+#       define fbx_unordered_map unordered_map
+#       define fbx_unordered_multimap unordered_multimap
+#   else
+#       define fbx_unordered_map tr1::unordered_map
+#       define fbx_unordered_multimap tr1::unordered_multimap
+#   endif
+#endif
+
+#endif // INCLUDED_AI_FBX_COMPILECONFIG_H

thirdparty/assimp/code/FBX/FBXConverter.h

@@ -0,0 +1,464 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXDConverter.h
+ *  @brief FBX DOM to aiScene conversion
+ */
+#ifndef INCLUDED_AI_FBX_CONVERTER_H
+#define INCLUDED_AI_FBX_CONVERTER_H
+
+#include "FBXParser.h"
+#include "FBXMeshGeometry.h"
+#include "FBXDocument.h"
+#include "FBXUtil.h"
+#include "FBXProperties.h"
+#include "FBXImporter.h"
+
+#include <assimp/anim.h>
+#include <assimp/material.h>
+#include <assimp/light.h>
+#include <assimp/texture.h>
+#include <assimp/camera.h>
+#include <assimp/StringComparison.h>
+#include <unordered_map>
+#include <unordered_set>
+
+struct aiScene;
+struct aiNode;
+struct aiMaterial;
+
+struct morphKeyData {
+    std::vector<unsigned int> values;
+    std::vector<float> weights;
+};
+typedef std::map<int64_t, morphKeyData*> morphAnimData;
+
+namespace Assimp {
+namespace FBX {
+
+class Document;
+/** 
+ *  Convert a FBX #Document to #aiScene
+ *  @param out Empty scene to be populated
+ *  @param doc Parsed FBX document
+ *  @param removeEmptyBones Will remove bones, which do not have any references to vertices.
+ */
+void ConvertToAssimpScene(aiScene* out, const Document& doc, bool removeEmptyBones);
+
+/** Dummy class to encapsulate the conversion process */
+class FBXConverter {
+public:
+    /**
+    *  The different parts that make up the final local transformation of a fbx-node
+    */
+    enum TransformationComp {
+        TransformationComp_GeometricScalingInverse = 0,
+        TransformationComp_GeometricRotationInverse,
+        TransformationComp_GeometricTranslationInverse,
+        TransformationComp_Translation,
+        TransformationComp_RotationOffset,
+        TransformationComp_RotationPivot,
+        TransformationComp_PreRotation,
+        TransformationComp_Rotation,
+        TransformationComp_PostRotation,
+        TransformationComp_RotationPivotInverse,
+        TransformationComp_ScalingOffset,
+        TransformationComp_ScalingPivot,
+        TransformationComp_Scaling,
+        TransformationComp_ScalingPivotInverse,
+        TransformationComp_GeometricTranslation,
+        TransformationComp_GeometricRotation,
+        TransformationComp_GeometricScaling,
+
+        TransformationComp_MAXIMUM
+    };
+
+public:
+    FBXConverter(aiScene* out, const Document& doc, bool removeEmptyBones);
+    ~FBXConverter();
+
+private:
+    // ------------------------------------------------------------------------------------------------
+    // find scene root and trigger recursive scene conversion
+    void ConvertRootNode();
+
+    // ------------------------------------------------------------------------------------------------
+    // collect and assign child nodes
+    void ConvertNodes(uint64_t id, aiNode& parent, const aiMatrix4x4& parent_transform = aiMatrix4x4());
+
+    // ------------------------------------------------------------------------------------------------
+    void ConvertLights(const Model& model, const std::string &orig_name );
+
+    // ------------------------------------------------------------------------------------------------
+    void ConvertCameras(const Model& model, const std::string &orig_name );
+
+    // ------------------------------------------------------------------------------------------------
+    void ConvertLight( const Light& light, const std::string &orig_name );
+
+    // ------------------------------------------------------------------------------------------------
+    void ConvertCamera( const Camera& cam, const std::string &orig_name );
+
+    // ------------------------------------------------------------------------------------------------
+    void GetUniqueName( const std::string &name, std::string& uniqueName );
+
+    // ------------------------------------------------------------------------------------------------
+    // this returns unified names usable within assimp identifiers (i.e. no space characters -
+    // while these would be allowed, they are a potential trouble spot so better not use them).
+    const char* NameTransformationComp(TransformationComp comp);
+
+    // ------------------------------------------------------------------------------------------------
+    // Returns an unique name for a node or traverses up a hierarchy until a non-empty name is found and
+    // then makes this name unique
+    std::string MakeUniqueNodeName(const Model* const model, const aiNode& parent);
+
+    // ------------------------------------------------------------------------------------------------
+    // note: this returns the REAL fbx property names
+    const char* NameTransformationCompProperty(TransformationComp comp);
+
+    // ------------------------------------------------------------------------------------------------
+    aiVector3D TransformationCompDefaultValue(TransformationComp comp);
+
+    // ------------------------------------------------------------------------------------------------
+    void GetRotationMatrix(Model::RotOrder mode, const aiVector3D& rotation, aiMatrix4x4& out);
+    // ------------------------------------------------------------------------------------------------
+    /**
+    *  checks if a node has more than just scaling, rotation and translation components
+    */
+    bool NeedsComplexTransformationChain(const Model& model);
+
+    // ------------------------------------------------------------------------------------------------
+    // note: name must be a FixNodeName() result
+    std::string NameTransformationChainNode(const std::string& name, TransformationComp comp);
+
+    // ------------------------------------------------------------------------------------------------
+    /**
+    *  note: memory for output_nodes will be managed by the caller
+    */
+    bool GenerateTransformationNodeChain(const Model& model, const std::string& name, std::vector<aiNode*>& output_nodes, std::vector<aiNode*>& post_output_nodes);
+
+    // ------------------------------------------------------------------------------------------------
+    void SetupNodeMetadata(const Model& model, aiNode& nd);
+
+    // ------------------------------------------------------------------------------------------------
+    void ConvertModel(const Model& model, aiNode& nd, const aiMatrix4x4& node_global_transform);
+    
+    // ------------------------------------------------------------------------------------------------
+    // MeshGeometry -> aiMesh, return mesh index + 1 or 0 if the conversion failed
+    std::vector<unsigned int> ConvertMesh(const MeshGeometry& mesh, const Model& model,
+        const aiMatrix4x4& node_global_transform, aiNode& nd);
+
+    // ------------------------------------------------------------------------------------------------
+    std::vector<unsigned int> ConvertLine(const LineGeometry& line, const Model& model,
+        const aiMatrix4x4& node_global_transform, aiNode& nd);
+
+    // ------------------------------------------------------------------------------------------------
+    aiMesh* SetupEmptyMesh(const Geometry& mesh, aiNode& nd);
+
+    // ------------------------------------------------------------------------------------------------
+    unsigned int ConvertMeshSingleMaterial(const MeshGeometry& mesh, const Model& model,
+        const aiMatrix4x4& node_global_transform, aiNode& nd);
+
+    // ------------------------------------------------------------------------------------------------
+    std::vector<unsigned int> ConvertMeshMultiMaterial(const MeshGeometry& mesh, const Model& model,
+        const aiMatrix4x4& node_global_transform, aiNode& nd);
+
+    // ------------------------------------------------------------------------------------------------
+    unsigned int ConvertMeshMultiMaterial(const MeshGeometry& mesh, const Model& model,
+        MatIndexArray::value_type index,
+        const aiMatrix4x4& node_global_transform, aiNode& nd);
+
+    // ------------------------------------------------------------------------------------------------
+    static const unsigned int NO_MATERIAL_SEPARATION = /* std::numeric_limits<unsigned int>::max() */
+        static_cast<unsigned int>(-1);
+
+    // ------------------------------------------------------------------------------------------------
+    /**
+    *  - if materialIndex == NO_MATERIAL_SEPARATION, materials are not taken into
+    *    account when determining which weights to include.
+    *  - outputVertStartIndices is only used when a material index is specified, it gives for
+    *    each output vertex the DOM index it maps to.
+    */
+    void ConvertWeights(aiMesh* out, const Model& model, const MeshGeometry& geo,
+        const aiMatrix4x4& node_global_transform = aiMatrix4x4(),
+        unsigned int materialIndex = NO_MATERIAL_SEPARATION,
+        std::vector<unsigned int>* outputVertStartIndices = NULL);
+
+    // ------------------------------------------------------------------------------------------------
+    void ConvertCluster(std::vector<aiBone*>& bones, const Model& /*model*/, const Cluster& cl,
+        std::vector<size_t>& out_indices,
+        std::vector<size_t>& index_out_indices,
+        std::vector<size_t>& count_out_indices,
+        const aiMatrix4x4& node_global_transform);
+
+    // ------------------------------------------------------------------------------------------------
+    void ConvertMaterialForMesh(aiMesh* out, const Model& model, const MeshGeometry& geo,
+        MatIndexArray::value_type materialIndex);
+
+    // ------------------------------------------------------------------------------------------------
+    unsigned int GetDefaultMaterial();
+
+    // ------------------------------------------------------------------------------------------------
+    // Material -> aiMaterial
+    unsigned int ConvertMaterial(const Material& material, const MeshGeometry* const mesh);
+
+    // ------------------------------------------------------------------------------------------------
+    // Video -> aiTexture
+    unsigned int ConvertVideo(const Video& video);
+
+    // ------------------------------------------------------------------------------------------------
+    // convert embedded texture if necessary and return actual texture path
+    aiString GetTexturePath(const Texture* tex);
+
+    // ------------------------------------------------------------------------------------------------
+    void TrySetTextureProperties(aiMaterial* out_mat, const TextureMap& textures,
+        const std::string& propName,
+        aiTextureType target, const MeshGeometry* const mesh);
+
+    // ------------------------------------------------------------------------------------------------
+    void TrySetTextureProperties(aiMaterial* out_mat, const LayeredTextureMap& layeredTextures,
+        const std::string& propName,
+        aiTextureType target, const MeshGeometry* const mesh);
+
+    // ------------------------------------------------------------------------------------------------
+    void SetTextureProperties(aiMaterial* out_mat, const TextureMap& textures, const MeshGeometry* const mesh);
+
+    // ------------------------------------------------------------------------------------------------
+    void SetTextureProperties(aiMaterial* out_mat, const LayeredTextureMap& layeredTextures, const MeshGeometry* const mesh);
+
+    // ------------------------------------------------------------------------------------------------
+    aiColor3D GetColorPropertyFromMaterial(const PropertyTable& props, const std::string& baseName,
+        bool& result);
+    aiColor3D GetColorPropertyFactored(const PropertyTable& props, const std::string& colorName,
+        const std::string& factorName, bool& result, bool useTemplate = true);
+    aiColor3D GetColorProperty(const PropertyTable& props, const std::string& colorName,
+        bool& result, bool useTemplate = true);
+
+    // ------------------------------------------------------------------------------------------------
+    void SetShadingPropertiesCommon(aiMaterial* out_mat, const PropertyTable& props);
+    void SetShadingPropertiesRaw(aiMaterial* out_mat, const PropertyTable& props, const TextureMap& textures, const MeshGeometry* const mesh);
+
+    // ------------------------------------------------------------------------------------------------
+    // get the number of fps for a FrameRate enumerated value
+    static double FrameRateToDouble(FileGlobalSettings::FrameRate fp, double customFPSVal = -1.0);
+
+    // ------------------------------------------------------------------------------------------------
+    // convert animation data to aiAnimation et al
+    void ConvertAnimations();
+
+    // ------------------------------------------------------------------------------------------------
+    // takes a fbx node name and returns the identifier to be used in the assimp output scene.
+    // the function is guaranteed to provide consistent results over multiple invocations
+    // UNLESS RenameNode() is called for a particular node name.
+    std::string FixNodeName(const std::string& name);
+    std::string FixAnimMeshName(const std::string& name);
+
+    typedef std::map<const AnimationCurveNode*, const AnimationLayer*> LayerMap;
+
+    // XXX: better use multi_map ..
+    typedef std::map<std::string, std::vector<const AnimationCurveNode*> > NodeMap;
+
+    // ------------------------------------------------------------------------------------------------
+    void ConvertAnimationStack(const AnimationStack& st);
+
+    // ------------------------------------------------------------------------------------------------
+    void ProcessMorphAnimDatas(std::map<std::string, morphAnimData*>* morphAnimDatas, const BlendShapeChannel* bsc, const AnimationCurveNode* node);
+
+    // ------------------------------------------------------------------------------------------------
+    void GenerateNodeAnimations(std::vector<aiNodeAnim*>& node_anims,
+        const std::string& fixed_name,
+        const std::vector<const AnimationCurveNode*>& curves,
+        const LayerMap& layer_map,
+        int64_t start, int64_t stop,
+        double& max_time,
+        double& min_time);
+
+    // ------------------------------------------------------------------------------------------------
+    bool IsRedundantAnimationData(const Model& target,
+        TransformationComp comp,
+        const std::vector<const AnimationCurveNode*>& curves);
+
+    // ------------------------------------------------------------------------------------------------
+    aiNodeAnim* GenerateRotationNodeAnim(const std::string& name,
+        const Model& target,
+        const std::vector<const AnimationCurveNode*>& curves,
+        const LayerMap& layer_map,
+        int64_t start, int64_t stop,
+        double& max_time,
+        double& min_time);
+
+    // ------------------------------------------------------------------------------------------------
+    aiNodeAnim* GenerateScalingNodeAnim(const std::string& name,
+        const Model& /*target*/,
+        const std::vector<const AnimationCurveNode*>& curves,
+        const LayerMap& layer_map,
+        int64_t start, int64_t stop,
+        double& max_time,
+        double& min_time);
+
+    // ------------------------------------------------------------------------------------------------
+    aiNodeAnim* GenerateTranslationNodeAnim(const std::string& name,
+        const Model& /*target*/,
+        const std::vector<const AnimationCurveNode*>& curves,
+        const LayerMap& layer_map,
+        int64_t start, int64_t stop,
+        double& max_time,
+        double& min_time,
+        bool inverse = false);
+
+    // ------------------------------------------------------------------------------------------------
+    // generate node anim, extracting only Rotation, Scaling and Translation from the given chain
+    aiNodeAnim* GenerateSimpleNodeAnim(const std::string& name,
+        const Model& target,
+        NodeMap::const_iterator chain[TransformationComp_MAXIMUM],
+        NodeMap::const_iterator iter_end,
+        const LayerMap& layer_map,
+        int64_t start, int64_t stop,
+        double& max_time,
+        double& min_time,
+        bool reverse_order = false);
+
+    // key (time), value, mapto (component index)
+    typedef std::tuple<std::shared_ptr<KeyTimeList>, std::shared_ptr<KeyValueList>, unsigned int > KeyFrameList;
+    typedef std::vector<KeyFrameList> KeyFrameListList;
+
+    // ------------------------------------------------------------------------------------------------
+    KeyFrameListList GetKeyframeList(const std::vector<const AnimationCurveNode*>& nodes, int64_t start, int64_t stop);
+
+    // ------------------------------------------------------------------------------------------------
+    KeyTimeList GetKeyTimeList(const KeyFrameListList& inputs);
+
+    // ------------------------------------------------------------------------------------------------
+    void InterpolateKeys(aiVectorKey* valOut, const KeyTimeList& keys, const KeyFrameListList& inputs,
+        const aiVector3D& def_value,
+        double& max_time,
+        double& min_time);
+
+    // ------------------------------------------------------------------------------------------------
+    void InterpolateKeys(aiQuatKey* valOut, const KeyTimeList& keys, const KeyFrameListList& inputs,
+        const aiVector3D& def_value,
+        double& maxTime,
+        double& minTime,
+        Model::RotOrder order);
+
+    // ------------------------------------------------------------------------------------------------
+    void ConvertTransformOrder_TRStoSRT(aiQuatKey* out_quat, aiVectorKey* out_scale,
+        aiVectorKey* out_translation,
+        const KeyFrameListList& scaling,
+        const KeyFrameListList& translation,
+        const KeyFrameListList& rotation,
+        const KeyTimeList& times,
+        double& maxTime,
+        double& minTime,
+        Model::RotOrder order,
+        const aiVector3D& def_scale,
+        const aiVector3D& def_translate,
+        const aiVector3D& def_rotation);
+
+    // ------------------------------------------------------------------------------------------------
+    // euler xyz -> quat
+    aiQuaternion EulerToQuaternion(const aiVector3D& rot, Model::RotOrder order);
+
+    // ------------------------------------------------------------------------------------------------
+    void ConvertScaleKeys(aiNodeAnim* na, const std::vector<const AnimationCurveNode*>& nodes, const LayerMap& /*layers*/,
+        int64_t start, int64_t stop,
+        double& maxTime,
+        double& minTime);
+
+    // ------------------------------------------------------------------------------------------------
+    void ConvertTranslationKeys(aiNodeAnim* na, const std::vector<const AnimationCurveNode*>& nodes,
+        const LayerMap& /*layers*/,
+        int64_t start, int64_t stop,
+        double& maxTime,
+        double& minTime);
+
+    // ------------------------------------------------------------------------------------------------
+    void ConvertRotationKeys(aiNodeAnim* na, const std::vector<const AnimationCurveNode*>& nodes,
+        const LayerMap& /*layers*/,
+        int64_t start, int64_t stop,
+        double& maxTime,
+        double& minTime,
+        Model::RotOrder order);
+
+    void ConvertGlobalSettings();
+
+    // ------------------------------------------------------------------------------------------------
+    // copy generated meshes, animations, lights, cameras and textures to the output scene
+    void TransferDataToScene();
+
+private:
+    // 0: not assigned yet, others: index is value - 1
+    unsigned int defaultMaterialIndex;
+
+    std::vector<aiMesh*> meshes;
+    std::vector<aiMaterial*> materials;
+    std::vector<aiAnimation*> animations;
+    std::vector<aiLight*> lights;
+    std::vector<aiCamera*> cameras;
+    std::vector<aiTexture*> textures;
+
+    using MaterialMap = std::map<const Material*, unsigned int>;
+    MaterialMap materials_converted;
+
+    using VideoMap = std::map<const Video*, unsigned int>;
+    VideoMap textures_converted;
+
+    using MeshMap = std::map<const Geometry*, std::vector<unsigned int> >;
+    MeshMap meshes_converted;
+
+    // fixed node name -> which trafo chain components have animations?
+    using NodeAnimBitMap = std::map<std::string, unsigned int> ;
+    NodeAnimBitMap node_anim_chain_bits;
+
+    // number of nodes with the same name
+    using NodeNameCache = std::unordered_map<std::string, unsigned int>;
+    NodeNameCache mNodeNames;
+
+    double anim_fps;
+
+    aiScene* const out;
+    const FBX::Document& doc;
+};
+
+}
+}
+
+#endif // INCLUDED_AI_FBX_CONVERTER_H

thirdparty/assimp/code/FBX/FBXDeformer.cpp

@@ -0,0 +1,213 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXNoteAttribute.cpp
+ *  @brief Assimp::FBX::NodeAttribute (and subclasses) implementation
+ */
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+#include "FBXParser.h"
+#include "FBXDocument.h"
+#include "FBXMeshGeometry.h"
+#include "FBXImporter.h"
+#include "FBXDocumentUtil.h"
+
+namespace Assimp {
+namespace FBX {
+
+using namespace Util;
+
+// ------------------------------------------------------------------------------------------------
+Deformer::Deformer(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+    : Object(id,element,name)
+{
+    const Scope& sc = GetRequiredScope(element);
+
+    const std::string& classname = ParseTokenAsString(GetRequiredToken(element,2));
+    props = GetPropertyTable(doc,"Deformer.Fbx" + classname,element,sc,true);
+}
+
+
+// ------------------------------------------------------------------------------------------------
+Deformer::~Deformer()
+{
+
+}
+
+
+// ------------------------------------------------------------------------------------------------
+Cluster::Cluster(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+: Deformer(id,element,doc,name)
+, node()
+{
+    const Scope& sc = GetRequiredScope(element);
+
+    const Element* const Indexes = sc["Indexes"];
+    const Element* const Weights = sc["Weights"];
+
+    const Element& Transform = GetRequiredElement(sc,"Transform",&element);
+    const Element& TransformLink = GetRequiredElement(sc,"TransformLink",&element);
+
+    transform = ReadMatrix(Transform);
+    transformLink = ReadMatrix(TransformLink);
+
+    // it is actually possible that there be Deformer's with no weights
+    if (!!Indexes != !!Weights) {
+        DOMError("either Indexes or Weights are missing from Cluster",&element);
+    }
+
+    if(Indexes) {
+        ParseVectorDataArray(indices,*Indexes);
+        ParseVectorDataArray(weights,*Weights);
+    }
+
+    if(indices.size() != weights.size()) {
+        DOMError("sizes of index and weight array don't match up",&element);
+    }
+
+    // read assigned node
+    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(),"Model");
+    for(const Connection* con : conns) {
+        const Model* const mod = ProcessSimpleConnection<Model>(*con, false, "Model -> Cluster", element);
+        if(mod) {
+            node = mod;
+            break;
+        }
+    }
+
+    if (!node) {
+        DOMError("failed to read target Node for Cluster",&element);
+    }
+}
+
+
+// ------------------------------------------------------------------------------------------------
+Cluster::~Cluster()
+{
+
+}
+
+
+// ------------------------------------------------------------------------------------------------
+Skin::Skin(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+: Deformer(id,element,doc,name)
+, accuracy( 0.0f ) {
+    const Scope& sc = GetRequiredScope(element);
+
+    const Element* const Link_DeformAcuracy = sc["Link_DeformAcuracy"];
+    if(Link_DeformAcuracy) {
+        accuracy = ParseTokenAsFloat(GetRequiredToken(*Link_DeformAcuracy,0));
+    }
+
+    // resolve assigned clusters
+    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(),"Deformer");
+
+    clusters.reserve(conns.size());
+    for(const Connection* con : conns) {
+
+        const Cluster* const cluster = ProcessSimpleConnection<Cluster>(*con, false, "Cluster -> Skin", element);
+        if(cluster) {
+            clusters.push_back(cluster);
+            continue;
+        }
+    }
+}
+
+
+// ------------------------------------------------------------------------------------------------
+Skin::~Skin()
+{
+
+}
+// ------------------------------------------------------------------------------------------------
+BlendShape::BlendShape(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+    : Deformer(id, element, doc, name)
+{
+    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(), "Deformer");
+    blendShapeChannels.reserve(conns.size());
+    for (const Connection* con : conns) {
+        const BlendShapeChannel* const bspc = ProcessSimpleConnection<BlendShapeChannel>(*con, false, "BlendShapeChannel -> BlendShape", element);
+        if (bspc) {
+            blendShapeChannels.push_back(bspc);
+            continue;
+        }
+    }
+}
+// ------------------------------------------------------------------------------------------------
+BlendShape::~BlendShape()
+{
+
+}
+// ------------------------------------------------------------------------------------------------
+BlendShapeChannel::BlendShapeChannel(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+    : Deformer(id, element, doc, name)
+{
+    const Scope& sc = GetRequiredScope(element);
+    const Element* const DeformPercent = sc["DeformPercent"];
+    if (DeformPercent) {
+        percent = ParseTokenAsFloat(GetRequiredToken(*DeformPercent, 0));
+    }
+    const Element* const FullWeights = sc["FullWeights"];
+    if (FullWeights) {
+        ParseVectorDataArray(fullWeights, *FullWeights);
+    }
+    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(), "Geometry");
+    shapeGeometries.reserve(conns.size());
+    for (const Connection* con : conns) {
+        const ShapeGeometry* const sg = ProcessSimpleConnection<ShapeGeometry>(*con, false, "Shape -> BlendShapeChannel", element);
+        if (sg) {
+            shapeGeometries.push_back(sg);
+            continue;
+        }
+    }
+}
+// ------------------------------------------------------------------------------------------------
+BlendShapeChannel::~BlendShapeChannel()
+{
+
+}
+// ------------------------------------------------------------------------------------------------
+}
+}
+#endif
+

thirdparty/assimp/code/FBX/FBXDocument.cpp

@@ -0,0 +1,718 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the*
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXDocument.cpp
+ *  @brief Implementation of the FBX DOM classes
+ */
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+#include "FBXDocument.h"
+#include "FBXMeshGeometry.h"
+#include "FBXParser.h"
+#include "FBXUtil.h"
+#include "FBXImporter.h"
+#include "FBXImportSettings.h"
+#include "FBXDocumentUtil.h"
+#include "FBXProperties.h"
+
+#include <memory>
+#include <functional>
+#include <map>
+
+namespace Assimp {
+namespace FBX {
+
+using namespace Util;
+
+// ------------------------------------------------------------------------------------------------
+LazyObject::LazyObject(uint64_t id, const Element& element, const Document& doc)
+: doc(doc)
+, element(element)
+, id(id)
+, flags() {
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+LazyObject::~LazyObject()
+{
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+const Object* LazyObject::Get(bool dieOnError)
+{
+    if(IsBeingConstructed() || FailedToConstruct()) {
+        return nullptr;
+    }
+
+    if (object.get()) {
+        return object.get();
+    }
+
+    const Token& key = element.KeyToken();
+    const TokenList& tokens = element.Tokens();
+
+    if(tokens.size() < 3) {
+        DOMError("expected at least 3 tokens: id, name and class tag",&element);
+    }
+
+    const char* err;
+    std::string name = ParseTokenAsString(*tokens[1],err);
+    if (err) {
+        DOMError(err,&element);
+    }
+
+    // small fix for binary reading: binary fbx files don't use
+    // prefixes such as Model:: in front of their names. The
+    // loading code expects this at many places, though!
+    // so convert the binary representation (a 0x0001) to the
+    // double colon notation.
+    if(tokens[1]->IsBinary()) {
+        for (size_t i = 0; i < name.length(); ++i) {
+            if (name[i] == 0x0 && name[i+1] == 0x1) {
+                name = name.substr(i+2) + "::" + name.substr(0,i);
+            }
+        }
+    }
+
+    const std::string classtag = ParseTokenAsString(*tokens[2],err);
+    if (err) {
+        DOMError(err,&element);
+    }
+
+    // prevent recursive calls
+    flags |= BEING_CONSTRUCTED;
+
+    try {
+        // this needs to be relatively fast since it happens a lot,
+        // so avoid constructing strings all the time.
+        const char* obtype = key.begin();
+        const size_t length = static_cast<size_t>(key.end()-key.begin());
+
+        // For debugging
+        //dumpObjectClassInfo( objtype, classtag );
+
+        if (!strncmp(obtype,"Geometry",length)) {
+            if (!strcmp(classtag.c_str(),"Mesh")) {
+                object.reset(new MeshGeometry(id,element,name,doc));
+            }
+            if (!strcmp(classtag.c_str(), "Shape")) {
+                object.reset(new ShapeGeometry(id, element, name, doc));
+            }
+            if (!strcmp(classtag.c_str(), "Line")) {
+                object.reset(new LineGeometry(id, element, name, doc));
+            }
+        }
+        else if (!strncmp(obtype,"NodeAttribute",length)) {
+            if (!strcmp(classtag.c_str(),"Camera")) {
+                object.reset(new Camera(id,element,doc,name));
+            }
+            else if (!strcmp(classtag.c_str(),"CameraSwitcher")) {
+                object.reset(new CameraSwitcher(id,element,doc,name));
+            }
+            else if (!strcmp(classtag.c_str(),"Light")) {
+                object.reset(new Light(id,element,doc,name));
+            }
+            else if (!strcmp(classtag.c_str(),"Null")) {
+                object.reset(new Null(id,element,doc,name));
+            }
+            else if (!strcmp(classtag.c_str(),"LimbNode")) {
+                object.reset(new LimbNode(id,element,doc,name));
+            }
+        }
+        else if (!strncmp(obtype,"Deformer",length)) {
+            if (!strcmp(classtag.c_str(),"Cluster")) {
+                object.reset(new Cluster(id,element,doc,name));
+            }
+            else if (!strcmp(classtag.c_str(),"Skin")) {
+                object.reset(new Skin(id,element,doc,name));
+            }
+            else if (!strcmp(classtag.c_str(), "BlendShape")) {
+                object.reset(new BlendShape(id, element, doc, name));
+            }
+            else if (!strcmp(classtag.c_str(), "BlendShapeChannel")) {
+                object.reset(new BlendShapeChannel(id, element, doc, name));
+            }
+        }
+        else if ( !strncmp( obtype, "Model", length ) ) {
+            // FK and IK effectors are not supported
+            if ( strcmp( classtag.c_str(), "IKEffector" ) && strcmp( classtag.c_str(), "FKEffector" ) ) {
+                object.reset( new Model( id, element, doc, name ) );
+            }
+        }
+        else if (!strncmp(obtype,"Material",length)) {
+            object.reset(new Material(id,element,doc,name));
+        }
+        else if (!strncmp(obtype,"Texture",length)) {
+            object.reset(new Texture(id,element,doc,name));
+        }
+        else if (!strncmp(obtype,"LayeredTexture",length)) {
+            object.reset(new LayeredTexture(id,element,doc,name));
+        }
+        else if (!strncmp(obtype,"Video",length)) {
+            object.reset(new Video(id,element,doc,name));
+        }
+        else if (!strncmp(obtype,"AnimationStack",length)) {
+            object.reset(new AnimationStack(id,element,name,doc));
+        }
+        else if (!strncmp(obtype,"AnimationLayer",length)) {
+            object.reset(new AnimationLayer(id,element,name,doc));
+        }
+        // note: order matters for these two
+        else if (!strncmp(obtype,"AnimationCurve",length)) {
+            object.reset(new AnimationCurve(id,element,name,doc));
+        }
+        else if (!strncmp(obtype,"AnimationCurveNode",length)) {
+            object.reset(new AnimationCurveNode(id,element,name,doc));
+        }
+    }
+    catch(std::exception& ex) {
+        flags &= ~BEING_CONSTRUCTED;
+        flags |= FAILED_TO_CONSTRUCT;
+
+        if(dieOnError || doc.Settings().strictMode) {
+            throw;
+        }
+
+        // note: the error message is already formatted, so raw logging is ok
+        if(!DefaultLogger::isNullLogger()) {
+            ASSIMP_LOG_ERROR(ex.what());
+        }
+        return NULL;
+    }
+
+    if (!object.get()) {
+        //DOMError("failed to convert element to DOM object, class: " + classtag + ", name: " + name,&element);
+    }
+
+    flags &= ~BEING_CONSTRUCTED;
+    return object.get();
+}
+
+// ------------------------------------------------------------------------------------------------
+Object::Object(uint64_t id, const Element& element, const std::string& name)
+: element(element)
+, name(name)
+, id(id)
+{
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+Object::~Object()
+{
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+FileGlobalSettings::FileGlobalSettings(const Document& doc, std::shared_ptr<const PropertyTable> props)
+: props(props)
+, doc(doc)
+{
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+FileGlobalSettings::~FileGlobalSettings()
+{
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+Document::Document(const Parser& parser, const ImportSettings& settings)
+: settings(settings)
+, parser(parser)
+{
+    // Cannot use array default initialization syntax because vc8 fails on it
+    for (auto &timeStamp : creationTimeStamp) {
+        timeStamp = 0;
+    }
+
+    ReadHeader();
+    ReadPropertyTemplates();
+
+    ReadGlobalSettings();
+
+    // This order is important, connections need parsed objects to check
+    // whether connections are ok or not. Objects may not be evaluated yet,
+    // though, since this may require valid connections.
+    ReadObjects();
+    ReadConnections();
+}
+
+// ------------------------------------------------------------------------------------------------
+Document::~Document()
+{
+    for(ObjectMap::value_type& v : objects) {
+        delete v.second;
+    }
+
+    for(ConnectionMap::value_type& v : src_connections) {
+        delete v.second;
+    }
+    // |dest_connections| contain the same Connection objects as the |src_connections|
+}
+
+// ------------------------------------------------------------------------------------------------
+static const unsigned int LowerSupportedVersion = 7100;
+static const unsigned int UpperSupportedVersion = 7400;
+
+void Document::ReadHeader() {
+    // Read ID objects from "Objects" section
+    const Scope& sc = parser.GetRootScope();
+    const Element* const ehead = sc["FBXHeaderExtension"];
+    if(!ehead || !ehead->Compound()) {
+        DOMError("no FBXHeaderExtension dictionary found");
+    }
+
+    const Scope& shead = *ehead->Compound();
+    fbxVersion = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(shead,"FBXVersion",ehead),0));
+
+    // While we may have some success with newer files, we don't support
+    // the older 6.n fbx format
+    if(fbxVersion < LowerSupportedVersion ) {
+        DOMError("unsupported, old format version, supported are only FBX 2011, FBX 2012 and FBX 2013");
+    }
+    if(fbxVersion > UpperSupportedVersion ) {
+        if(Settings().strictMode) {
+            DOMError("unsupported, newer format version, supported are only FBX 2011, FBX 2012 and FBX 2013"
+                " (turn off strict mode to try anyhow) ");
+        }
+        else {
+            DOMWarning("unsupported, newer format version, supported are only FBX 2011, FBX 2012 and FBX 2013,"
+                " trying to read it nevertheless");
+        }
+    }
+
+    const Element* const ecreator = shead["Creator"];
+    if(ecreator) {
+        creator = ParseTokenAsString(GetRequiredToken(*ecreator,0));
+    }
+
+    const Element* const etimestamp = shead["CreationTimeStamp"];
+    if(etimestamp && etimestamp->Compound()) {
+        const Scope& stimestamp = *etimestamp->Compound();
+        creationTimeStamp[0] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Year"),0));
+        creationTimeStamp[1] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Month"),0));
+        creationTimeStamp[2] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Day"),0));
+        creationTimeStamp[3] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Hour"),0));
+        creationTimeStamp[4] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Minute"),0));
+        creationTimeStamp[5] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Second"),0));
+        creationTimeStamp[6] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Millisecond"),0));
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+void Document::ReadGlobalSettings()
+{
+    const Scope& sc = parser.GetRootScope();
+    const Element* const ehead = sc["GlobalSettings"];
+    if ( nullptr == ehead || !ehead->Compound() ) {
+        DOMWarning( "no GlobalSettings dictionary found" );
+        globals.reset(new FileGlobalSettings(*this, std::make_shared<const PropertyTable>()));
+        return;
+    }
+
+    std::shared_ptr<const PropertyTable> props = GetPropertyTable( *this, "", *ehead, *ehead->Compound(), true );
+
+    //double v = PropertyGet<float>( *props.get(), std::string("UnitScaleFactor"), 1.0 );
+
+    if(!props) {
+        DOMError("GlobalSettings dictionary contains no property table");
+    }
+
+    globals.reset(new FileGlobalSettings(*this, props));
+}
+
+// ------------------------------------------------------------------------------------------------
+void Document::ReadObjects()
+{
+    // read ID objects from "Objects" section
+    const Scope& sc = parser.GetRootScope();
+    const Element* const eobjects = sc["Objects"];
+    if(!eobjects || !eobjects->Compound()) {
+        DOMError("no Objects dictionary found");
+    }
+
+    // add a dummy entry to represent the Model::RootNode object (id 0),
+    // which is only indirectly defined in the input file
+    objects[0] = new LazyObject(0L, *eobjects, *this);
+
+    const Scope& sobjects = *eobjects->Compound();
+    for(const ElementMap::value_type& el : sobjects.Elements()) {
+
+        // extract ID
+        const TokenList& tok = el.second->Tokens();
+
+        if (tok.empty()) {
+            DOMError("expected ID after object key",el.second);
+        }
+
+        const char* err;
+        const uint64_t id = ParseTokenAsID(*tok[0], err);
+        if(err) {
+            DOMError(err,el.second);
+        }
+
+        // id=0 is normally implicit
+        if(id == 0L) {
+            DOMError("encountered object with implicitly defined id 0",el.second);
+        }
+
+        if(objects.find(id) != objects.end()) {
+            DOMWarning("encountered duplicate object id, ignoring first occurrence",el.second);
+        }
+
+        objects[id] = new LazyObject(id, *el.second, *this);
+
+        // grab all animation stacks upfront since there is no listing of them
+        if(!strcmp(el.first.c_str(),"AnimationStack")) {
+            animationStacks.push_back(id);
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+void Document::ReadPropertyTemplates()
+{
+    const Scope& sc = parser.GetRootScope();
+    // read property templates from "Definitions" section
+    const Element* const edefs = sc["Definitions"];
+    if(!edefs || !edefs->Compound()) {
+        DOMWarning("no Definitions dictionary found");
+        return;
+    }
+
+    const Scope& sdefs = *edefs->Compound();
+    const ElementCollection otypes = sdefs.GetCollection("ObjectType");
+    for(ElementMap::const_iterator it = otypes.first; it != otypes.second; ++it) {
+        const Element& el = *(*it).second;
+        const Scope* sc = el.Compound();
+        if(!sc) {
+            DOMWarning("expected nested scope in ObjectType, ignoring",&el);
+            continue;
+        }
+
+        const TokenList& tok = el.Tokens();
+        if(tok.empty()) {
+            DOMWarning("expected name for ObjectType element, ignoring",&el);
+            continue;
+        }
+
+        const std::string& oname = ParseTokenAsString(*tok[0]);
+
+        const ElementCollection templs = sc->GetCollection("PropertyTemplate");
+        for(ElementMap::const_iterator it = templs.first; it != templs.second; ++it) {
+            const Element& el = *(*it).second;
+            const Scope* sc = el.Compound();
+            if(!sc) {
+                DOMWarning("expected nested scope in PropertyTemplate, ignoring",&el);
+                continue;
+            }
+
+            const TokenList& tok = el.Tokens();
+            if(tok.empty()) {
+                DOMWarning("expected name for PropertyTemplate element, ignoring",&el);
+                continue;
+            }
+
+            const std::string& pname = ParseTokenAsString(*tok[0]);
+
+            const Element* Properties70 = (*sc)["Properties70"];
+            if(Properties70) {
+                std::shared_ptr<const PropertyTable> props = std::make_shared<const PropertyTable>(
+                    *Properties70,std::shared_ptr<const PropertyTable>(static_cast<const PropertyTable*>(NULL))
+                );
+
+                templates[oname+"."+pname] = props;
+            }
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+void Document::ReadConnections()
+{
+    const Scope& sc = parser.GetRootScope();
+    // read property templates from "Definitions" section
+    const Element* const econns = sc["Connections"];
+    if(!econns || !econns->Compound()) {
+        DOMError("no Connections dictionary found");
+    }
+
+    uint64_t insertionOrder = 0l;
+    const Scope& sconns = *econns->Compound();
+    const ElementCollection conns = sconns.GetCollection("C");
+    for(ElementMap::const_iterator it = conns.first; it != conns.second; ++it) {
+        const Element& el = *(*it).second;
+        const std::string& type = ParseTokenAsString(GetRequiredToken(el,0));
+
+        // PP = property-property connection, ignored for now
+        // (tokens: "PP", ID1, "Property1", ID2, "Property2")
+        if ( type == "PP" ) {
+            continue;
+        }
+
+        const uint64_t src = ParseTokenAsID(GetRequiredToken(el,1));
+        const uint64_t dest = ParseTokenAsID(GetRequiredToken(el,2));
+
+        // OO = object-object connection
+        // OP = object-property connection, in which case the destination property follows the object ID
+        const std::string& prop = (type == "OP" ? ParseTokenAsString(GetRequiredToken(el,3)) : "");
+
+        if(objects.find(src) == objects.end()) {
+            DOMWarning("source object for connection does not exist",&el);
+            continue;
+        }
+
+        // dest may be 0 (root node) but we added a dummy object before
+        if(objects.find(dest) == objects.end()) {
+            DOMWarning("destination object for connection does not exist",&el);
+            continue;
+        }
+
+        // add new connection
+        const Connection* const c = new Connection(insertionOrder++,src,dest,prop,*this);
+        src_connections.insert(ConnectionMap::value_type(src,c));
+        dest_connections.insert(ConnectionMap::value_type(dest,c));
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+const std::vector<const AnimationStack*>& Document::AnimationStacks() const
+{
+    if (!animationStacksResolved.empty() || animationStacks.empty()) {
+        return animationStacksResolved;
+    }
+
+    animationStacksResolved.reserve(animationStacks.size());
+    for(uint64_t id : animationStacks) {
+        LazyObject* const lazy = GetObject(id);
+        const AnimationStack* stack;
+        if(!lazy || !(stack = lazy->Get<AnimationStack>())) {
+            DOMWarning("failed to read AnimationStack object");
+            continue;
+        }
+        animationStacksResolved.push_back(stack);
+    }
+
+    return animationStacksResolved;
+}
+
+// ------------------------------------------------------------------------------------------------
+LazyObject* Document::GetObject(uint64_t id) const
+{
+    ObjectMap::const_iterator it = objects.find(id);
+    return it == objects.end() ? nullptr : (*it).second;
+}
+
+#define MAX_CLASSNAMES 6
+
+// ------------------------------------------------------------------------------------------------
+std::vector<const Connection*> Document::GetConnectionsSequenced(uint64_t id, const ConnectionMap& conns) const
+{
+    std::vector<const Connection*> temp;
+
+    const std::pair<ConnectionMap::const_iterator,ConnectionMap::const_iterator> range =
+        conns.equal_range(id);
+
+    temp.reserve(std::distance(range.first,range.second));
+    for (ConnectionMap::const_iterator it = range.first; it != range.second; ++it) {
+        temp.push_back((*it).second);
+    }
+
+    std::sort(temp.begin(), temp.end(), std::mem_fn(&Connection::Compare));
+
+    return temp; // NRVO should handle this
+}
+
+// ------------------------------------------------------------------------------------------------
+std::vector<const Connection*> Document::GetConnectionsSequenced(uint64_t id, bool is_src,
+    const ConnectionMap& conns,
+    const char* const* classnames,
+    size_t count) const
+
+{
+    ai_assert(classnames);
+    ai_assert( count != 0 );
+    ai_assert( count <= MAX_CLASSNAMES);
+
+    size_t lengths[MAX_CLASSNAMES];
+
+    const size_t c = count;
+    for (size_t i = 0; i < c; ++i) {
+        lengths[ i ] = strlen(classnames[i]);
+    }
+
+    std::vector<const Connection*> temp;
+    const std::pair<ConnectionMap::const_iterator,ConnectionMap::const_iterator> range =
+        conns.equal_range(id);
+
+    temp.reserve(std::distance(range.first,range.second));
+    for (ConnectionMap::const_iterator it = range.first; it != range.second; ++it) {
+        const Token& key = (is_src
+            ? (*it).second->LazyDestinationObject()
+            : (*it).second->LazySourceObject()
+        ).GetElement().KeyToken();
+
+        const char* obtype = key.begin();
+
+        for (size_t i = 0; i < c; ++i) {
+            ai_assert(classnames[i]);
+            if(static_cast<size_t>(std::distance(key.begin(),key.end())) == lengths[i] && !strncmp(classnames[i],obtype,lengths[i])) {
+                obtype = nullptr;
+                break;
+            }
+        }
+
+        if(obtype) {
+            continue;
+        }
+
+        temp.push_back((*it).second);
+    }
+
+    std::sort(temp.begin(), temp.end(), std::mem_fn(&Connection::Compare));
+    return temp; // NRVO should handle this
+}
+
+// ------------------------------------------------------------------------------------------------
+std::vector<const Connection*> Document::GetConnectionsBySourceSequenced(uint64_t source) const
+{
+    return GetConnectionsSequenced(source, ConnectionsBySource());
+}
+
+// ------------------------------------------------------------------------------------------------
+std::vector<const Connection*> Document::GetConnectionsBySourceSequenced(uint64_t src, const char* classname) const
+{
+    const char* arr[] = {classname};
+    return GetConnectionsBySourceSequenced(src, arr,1);
+}
+
+// ------------------------------------------------------------------------------------------------
+std::vector<const Connection*> Document::GetConnectionsBySourceSequenced(uint64_t source, 
+        const char* const* classnames, size_t count) const
+{
+    return GetConnectionsSequenced(source, true, ConnectionsBySource(),classnames, count);
+}
+
+// ------------------------------------------------------------------------------------------------
+std::vector<const Connection*> Document::GetConnectionsByDestinationSequenced(uint64_t dest,
+        const char* classname) const
+{
+    const char* arr[] = {classname};
+    return GetConnectionsByDestinationSequenced(dest, arr,1);
+}
+
+// ------------------------------------------------------------------------------------------------
+std::vector<const Connection*> Document::GetConnectionsByDestinationSequenced(uint64_t dest) const
+{
+    return GetConnectionsSequenced(dest, ConnectionsByDestination());
+}
+
+// ------------------------------------------------------------------------------------------------
+std::vector<const Connection*> Document::GetConnectionsByDestinationSequenced(uint64_t dest,
+    const char* const* classnames, size_t count) const
+
+{
+    return GetConnectionsSequenced(dest, false, ConnectionsByDestination(),classnames, count);
+}
+
+// ------------------------------------------------------------------------------------------------
+Connection::Connection(uint64_t insertionOrder,  uint64_t src, uint64_t dest, const std::string& prop,
+        const Document& doc)
+
+: insertionOrder(insertionOrder)
+, prop(prop)
+, src(src)
+, dest(dest)
+, doc(doc)
+{
+    ai_assert(doc.Objects().find(src) != doc.Objects().end());
+    // dest may be 0 (root node)
+    ai_assert(!dest || doc.Objects().find(dest) != doc.Objects().end());
+}
+
+// ------------------------------------------------------------------------------------------------
+Connection::~Connection()
+{
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+LazyObject& Connection::LazySourceObject() const
+{
+    LazyObject* const lazy = doc.GetObject(src);
+    ai_assert(lazy);
+    return *lazy;
+}
+
+// ------------------------------------------------------------------------------------------------
+LazyObject& Connection::LazyDestinationObject() const
+{
+    LazyObject* const lazy = doc.GetObject(dest);
+    ai_assert(lazy);
+    return *lazy;
+}
+
+// ------------------------------------------------------------------------------------------------
+const Object* Connection::SourceObject() const
+{
+    LazyObject* const lazy = doc.GetObject(src);
+    ai_assert(lazy);
+    return lazy->Get();
+}
+
+// ------------------------------------------------------------------------------------------------
+const Object* Connection::DestinationObject() const
+{
+    LazyObject* const lazy = doc.GetObject(dest);
+    ai_assert(lazy);
+    return lazy->Get();
+}
+
+} // !FBX
+} // !Assimp
+
+#endif

thirdparty/assimp/code/FBX/FBXDocumentUtil.cpp

@@ -0,0 +1,135 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXDocumentUtil.cpp
+ *  @brief Implementation of the FBX DOM utility functions declared in FBXDocumentUtil.h
+ */
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+#include "FBXParser.h"
+#include "FBXDocument.h"
+#include "FBXUtil.h"
+#include "FBXDocumentUtil.h"
+#include "FBXProperties.h"
+
+
+namespace Assimp {
+namespace FBX {
+namespace Util {
+
+// ------------------------------------------------------------------------------------------------
+// signal DOM construction error, this is always unrecoverable. Throws DeadlyImportError.
+void DOMError(const std::string& message, const Token& token)
+{
+    throw DeadlyImportError(Util::AddTokenText("FBX-DOM",message,&token));
+}
+
+// ------------------------------------------------------------------------------------------------
+void DOMError(const std::string& message, const Element* element /*= NULL*/)
+{
+    if(element) {
+        DOMError(message,element->KeyToken());
+    }
+    throw DeadlyImportError("FBX-DOM " + message);
+}
+
+
+// ------------------------------------------------------------------------------------------------
+// print warning, do return
+void DOMWarning(const std::string& message, const Token& token)
+{
+    if(DefaultLogger::get()) {
+        ASSIMP_LOG_WARN(Util::AddTokenText("FBX-DOM",message,&token));
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+void DOMWarning(const std::string& message, const Element* element /*= NULL*/)
+{
+    if(element) {
+        DOMWarning(message,element->KeyToken());
+        return;
+    }
+    if(DefaultLogger::get()) {
+        ASSIMP_LOG_WARN("FBX-DOM: " + message);
+    }
+}
+
+
+// ------------------------------------------------------------------------------------------------
+// fetch a property table and the corresponding property template
+std::shared_ptr<const PropertyTable> GetPropertyTable(const Document& doc,
+    const std::string& templateName,
+    const Element &element,
+    const Scope& sc,
+    bool no_warn /*= false*/)
+{
+    const Element* const Properties70 = sc["Properties70"];
+    std::shared_ptr<const PropertyTable> templateProps = std::shared_ptr<const PropertyTable>(
+        static_cast<const PropertyTable*>(NULL));
+
+    if(templateName.length()) {
+        PropertyTemplateMap::const_iterator it = doc.Templates().find(templateName);
+        if(it != doc.Templates().end()) {
+            templateProps = (*it).second;
+        }
+    }
+
+    if(!Properties70 || !Properties70->Compound()) {
+        if(!no_warn) {
+            DOMWarning("property table (Properties70) not found",&element);
+        }
+        if(templateProps) {
+            return templateProps;
+        }
+        else {
+            return std::make_shared<const PropertyTable>();
+        }
+    }
+    return std::make_shared<const PropertyTable>(*Properties70,templateProps);
+}
+} // !Util
+} // !FBX
+} // !Assimp
+
+#endif

thirdparty/assimp/code/FBX/FBXDocumentUtil.h

@@ -0,0 +1,120 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2012, assimp team
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXDocumentUtil.h
+ *  @brief FBX internal utilities used by the DOM reading code
+ */
+#ifndef INCLUDED_AI_FBX_DOCUMENT_UTIL_H
+#define INCLUDED_AI_FBX_DOCUMENT_UTIL_H
+
+#include <assimp/defs.h>
+#include <string>
+#include <memory>
+#include "FBXDocument.h"
+
+struct Token;
+struct Element;
+
+namespace Assimp {
+namespace FBX {
+namespace Util {
+
+/* DOM/Parse error reporting - does not return */
+AI_WONT_RETURN void DOMError(const std::string& message, const Token& token) AI_WONT_RETURN_SUFFIX;
+AI_WONT_RETURN void DOMError(const std::string& message, const Element* element = NULL) AI_WONT_RETURN_SUFFIX;
+
+// does return
+void DOMWarning(const std::string& message, const Token& token);
+void DOMWarning(const std::string& message, const Element* element = NULL);
+
+
+// fetch a property table and the corresponding property template
+std::shared_ptr<const PropertyTable> GetPropertyTable(const Document& doc,
+    const std::string& templateName,
+    const Element &element,
+    const Scope& sc,
+    bool no_warn = false);
+
+// ------------------------------------------------------------------------------------------------
+template <typename T>
+inline
+const T* ProcessSimpleConnection(const Connection& con,
+    bool is_object_property_conn,
+    const char* name,
+    const Element& element,
+    const char** propNameOut = nullptr)
+{
+    if (is_object_property_conn && !con.PropertyName().length()) {
+        DOMWarning("expected incoming " + std::string(name) +
+            " link to be an object-object connection, ignoring",
+            &element
+            );
+        return nullptr;
+    }
+    else if (!is_object_property_conn && con.PropertyName().length()) {
+        DOMWarning("expected incoming " + std::string(name) +
+            " link to be an object-property connection, ignoring",
+            &element
+            );
+        return nullptr;
+    }
+
+    if(is_object_property_conn && propNameOut) {
+        // note: this is ok, the return value of PropertyValue() is guaranteed to
+        // remain valid and unchanged as long as the document exists.
+        *propNameOut = con.PropertyName().c_str();
+    }
+
+    const Object* const ob = con.SourceObject();
+    if(!ob) {
+        DOMWarning("failed to read source object for incoming " + std::string(name) +
+            " link, ignoring",
+            &element);
+        return nullptr;
+    }
+
+    return dynamic_cast<const T*>(ob);
+}
+
+} //!Util
+} //!FBX
+} //!Assimp
+
+#endif

thirdparty/assimp/code/FBX/FBXExportNode.cpp

@@ -0,0 +1,571 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+#ifndef ASSIMP_BUILD_NO_EXPORT
+#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
+
+#include "FBXExportNode.h"
+#include "FBXCommon.h"
+
+#include <assimp/StreamWriter.h> // StreamWriterLE
+#include <assimp/Exceptional.h> // DeadlyExportError
+#include <assimp/ai_assert.h>
+#include <assimp/StringUtils.h> // ai_snprintf
+
+#include <string>
+#include <ostream>
+#include <sstream> // ostringstream
+#include <memory> // shared_ptr
+
+namespace Assimp {
+// AddP70<type> helpers... there's no usable pattern here,
+// so all are defined as separate functions.
+// Even "animatable" properties are often completely different
+// from the standard (nonanimated) property definition,
+// so they are specified with an 'A' suffix.
+
+void FBX::Node::AddP70int(
+    const std::string& name, int32_t value
+) {
+    FBX::Node n("P");
+    n.AddProperties(name, "int", "Integer", "", value);
+    AddChild(n);
+}
+
+void FBX::Node::AddP70bool(
+    const std::string& name, bool value
+) {
+    FBX::Node n("P");
+    n.AddProperties(name, "bool", "", "", int32_t(value));
+    AddChild(n);
+}
+
+void FBX::Node::AddP70double(
+    const std::string& name, double value
+) {
+    FBX::Node n("P");
+    n.AddProperties(name, "double", "Number", "", value);
+    AddChild(n);
+}
+
+void FBX::Node::AddP70numberA(
+    const std::string& name, double value
+) {
+    FBX::Node n("P");
+    n.AddProperties(name, "Number", "", "A", value);
+    AddChild(n);
+}
+
+void FBX::Node::AddP70color(
+    const std::string& name, double r, double g, double b
+) {
+    FBX::Node n("P");
+    n.AddProperties(name, "ColorRGB", "Color", "", r, g, b);
+    AddChild(n);
+}
+
+void FBX::Node::AddP70colorA(
+    const std::string& name, double r, double g, double b
+) {
+    FBX::Node n("P");
+    n.AddProperties(name, "Color", "", "A", r, g, b);
+    AddChild(n);
+}
+
+void FBX::Node::AddP70vector(
+    const std::string& name, double x, double y, double z
+) {
+    FBX::Node n("P");
+    n.AddProperties(name, "Vector3D", "Vector", "", x, y, z);
+    AddChild(n);
+}
+
+void FBX::Node::AddP70vectorA(
+    const std::string& name, double x, double y, double z
+) {
+    FBX::Node n("P");
+    n.AddProperties(name, "Vector", "", "A", x, y, z);
+    AddChild(n);
+}
+
+void FBX::Node::AddP70string(
+    const std::string& name, const std::string& value
+) {
+    FBX::Node n("P");
+    n.AddProperties(name, "KString", "", "", value);
+    AddChild(n);
+}
+
+void FBX::Node::AddP70enum(
+    const std::string& name, int32_t value
+) {
+    FBX::Node n("P");
+    n.AddProperties(name, "enum", "", "", value);
+    AddChild(n);
+}
+
+void FBX::Node::AddP70time(
+    const std::string& name, int64_t value
+) {
+    FBX::Node n("P");
+    n.AddProperties(name, "KTime", "Time", "", value);
+    AddChild(n);
+}
+
+
+// public member functions for writing nodes to stream
+
+void FBX::Node::Dump(
+    std::shared_ptr<Assimp::IOStream> outfile,
+    bool binary, int indent
+) {
+    if (binary) {
+        Assimp::StreamWriterLE outstream(outfile);
+        DumpBinary(outstream);
+    } else {
+        std::ostringstream ss;
+        DumpAscii(ss, indent);
+        std::string s = ss.str();
+        outfile->Write(s.c_str(), s.size(), 1);
+    }
+}
+
+void FBX::Node::Dump(
+    Assimp::StreamWriterLE &outstream,
+    bool binary, int indent
+) {
+    if (binary) {
+        DumpBinary(outstream);
+    } else {
+        std::ostringstream ss;
+        DumpAscii(ss, indent);
+        outstream.PutString(ss.str());
+    }
+}
+
+
+// public member functions for low-level writing
+
+void FBX::Node::Begin(
+    Assimp::StreamWriterLE &s,
+    bool binary, int indent
+) {
+    if (binary) {
+        BeginBinary(s);
+    } else {
+        // assume we're at the correct place to start already
+        (void)indent;
+        std::ostringstream ss;
+        BeginAscii(ss, indent);
+        s.PutString(ss.str());
+    }
+}
+
+void FBX::Node::DumpProperties(
+    Assimp::StreamWriterLE& s,
+    bool binary, int indent
+) {
+    if (binary) {
+        DumpPropertiesBinary(s);
+    } else {
+        std::ostringstream ss;
+        DumpPropertiesAscii(ss, indent);
+        s.PutString(ss.str());
+    }
+}
+
+void FBX::Node::EndProperties(
+    Assimp::StreamWriterLE &s,
+    bool binary, int indent
+) {
+    EndProperties(s, binary, indent, properties.size());
+}
+
+void FBX::Node::EndProperties(
+    Assimp::StreamWriterLE &s,
+    bool binary, int indent,
+    size_t num_properties
+) {
+    if (binary) {
+        EndPropertiesBinary(s, num_properties);
+    } else {
+        // nothing to do
+        (void)indent;
+    }
+}
+
+void FBX::Node::BeginChildren(
+    Assimp::StreamWriterLE &s,
+    bool binary, int indent
+) {
+    if (binary) {
+        // nothing to do
+    } else {
+        std::ostringstream ss;
+        BeginChildrenAscii(ss, indent);
+        s.PutString(ss.str());
+    }
+}
+
+void FBX::Node::DumpChildren(
+    Assimp::StreamWriterLE& s,
+    bool binary, int indent
+) {
+    if (binary) {
+        DumpChildrenBinary(s);
+    } else {
+        std::ostringstream ss;
+        DumpChildrenAscii(ss, indent);
+        if (ss.tellp() > 0)
+            s.PutString(ss.str());
+    }
+}
+
+void FBX::Node::End(
+    Assimp::StreamWriterLE &s,
+    bool binary, int indent,
+    bool has_children
+) {
+    if (binary) {
+        EndBinary(s, has_children);
+    } else {
+        std::ostringstream ss;
+        EndAscii(ss, indent, has_children);
+        if (ss.tellp() > 0)
+            s.PutString(ss.str());
+    }
+}
+
+
+// public member functions for writing to binary fbx
+
+void FBX::Node::DumpBinary(Assimp::StreamWriterLE &s)
+{
+    // write header section (with placeholders for some things)
+    BeginBinary(s);
+
+    // write properties
+    DumpPropertiesBinary(s);
+
+    // go back and fill in property related placeholders
+    EndPropertiesBinary(s, properties.size());
+
+    // write children
+    DumpChildrenBinary(s);
+
+    // finish, filling in end offset placeholder
+    EndBinary(s, force_has_children || !children.empty());
+}
+
+
+// public member functions for writing to ascii fbx
+
+void FBX::Node::DumpAscii(std::ostream &s, int indent)
+{
+    // write name
+    BeginAscii(s, indent);
+
+    // write properties
+    DumpPropertiesAscii(s, indent);
+
+    if (force_has_children || !children.empty()) {
+        // begin children (with a '{')
+        BeginChildrenAscii(s, indent + 1);
+        // write children
+        DumpChildrenAscii(s, indent + 1);
+    }
+
+    // finish (also closing the children bracket '}')
+    EndAscii(s, indent, force_has_children || !children.empty());
+}
+
+
+// private member functions for low-level writing to fbx
+
+void FBX::Node::BeginBinary(Assimp::StreamWriterLE &s)
+{
+    // remember start pos so we can come back and write the end pos
+    this->start_pos = s.Tell();
+
+    // placeholders for end pos and property section info
+    s.PutU4(0); // end pos
+    s.PutU4(0); // number of properties
+    s.PutU4(0); // total property section length
+
+    // node name
+    s.PutU1(uint8_t(name.size())); // length of node name
+    s.PutString(name); // node name as raw bytes
+
+    // property data comes after here
+    this->property_start = s.Tell();
+}
+
+void FBX::Node::DumpPropertiesBinary(Assimp::StreamWriterLE& s)
+{
+    for (auto &p : properties) {
+        p.DumpBinary(s);
+    }
+}
+
+void FBX::Node::EndPropertiesBinary(
+    Assimp::StreamWriterLE &s,
+    size_t num_properties
+) {
+    if (num_properties == 0) { return; }
+    size_t pos = s.Tell();
+    ai_assert(pos > property_start);
+    size_t property_section_size = pos - property_start;
+    s.Seek(start_pos + 4);
+    s.PutU4(uint32_t(num_properties));
+    s.PutU4(uint32_t(property_section_size));
+    s.Seek(pos);
+}
+
+void FBX::Node::DumpChildrenBinary(Assimp::StreamWriterLE& s)
+{
+    for (FBX::Node& child : children) {
+        child.DumpBinary(s);
+    }
+}
+
+void FBX::Node::EndBinary(
+    Assimp::StreamWriterLE &s,
+    bool has_children
+) {
+    // if there were children, add a null record
+    if (has_children) { s.PutString(Assimp::FBX::NULL_RECORD); }
+
+    // now go back and write initial pos
+    this->end_pos = s.Tell();
+    s.Seek(start_pos);
+    s.PutU4(uint32_t(end_pos));
+    s.Seek(end_pos);
+}
+
+
+void FBX::Node::BeginAscii(std::ostream& s, int indent)
+{
+    s << '\n';
+    for (int i = 0; i < indent; ++i) { s << '\t'; }
+    s << name << ": ";
+}
+
+void FBX::Node::DumpPropertiesAscii(std::ostream &s, int indent)
+{
+    for (size_t i = 0; i < properties.size(); ++i) {
+        if (i > 0) { s << ", "; }
+        properties[i].DumpAscii(s, indent);
+    }
+}
+
+void FBX::Node::BeginChildrenAscii(std::ostream& s, int indent)
+{
+    // only call this if there are actually children
+    s << " {";
+    (void)indent;
+}
+
+void FBX::Node::DumpChildrenAscii(std::ostream& s, int indent)
+{
+    // children will need a lot of padding and corralling
+    if (children.size() || force_has_children) {
+        for (size_t i = 0; i < children.size(); ++i) {
+            // no compression in ascii files, so skip this node if it exists
+            if (children[i].name == "EncryptionType") { continue; }
+            // the child can dump itself
+            children[i].DumpAscii(s, indent);
+        }
+    }
+}
+
+void FBX::Node::EndAscii(std::ostream& s, int indent, bool has_children)
+{
+    if (!has_children) { return; } // nothing to do
+    s << '\n';
+    for (int i = 0; i < indent; ++i) { s << '\t'; }
+    s << "}";
+}
+
+// private helpers for static member functions
+
+// ascii property node from vector of doubles
+void FBX::Node::WritePropertyNodeAscii(
+    const std::string& name,
+    const std::vector<double>& v,
+    Assimp::StreamWriterLE& s,
+    int indent
+){
+    char buffer[32];
+    FBX::Node node(name);
+    node.Begin(s, false, indent);
+    std::string vsize = to_string(v.size());
+    // *<size> {
+    s.PutChar('*'); s.PutString(vsize); s.PutString(" {\n");
+    // indent + 1
+    for (int i = 0; i < indent + 1; ++i) { s.PutChar('\t'); }
+    // a: value,value,value,...
+    s.PutString("a: ");
+    int count = 0;
+    for (size_t i = 0; i < v.size(); ++i) {
+        if (i > 0) { s.PutChar(','); }
+        int len = ai_snprintf(buffer, sizeof(buffer), "%f", v[i]);
+        count += len;
+        if (count > 2048) { s.PutChar('\n'); count = 0; }
+        if (len < 0 || len > 31) {
+            // this should never happen
+            throw DeadlyExportError("failed to convert double to string");
+        }
+        for (int j = 0; j < len; ++j) { s.PutChar(buffer[j]); }
+    }
+    // }
+    s.PutChar('\n');
+    for (int i = 0; i < indent; ++i) { s.PutChar('\t'); }
+    s.PutChar('}'); s.PutChar(' ');
+    node.End(s, false, indent, false);
+}
+
+// ascii property node from vector of int32_t
+void FBX::Node::WritePropertyNodeAscii(
+    const std::string& name,
+    const std::vector<int32_t>& v,
+    Assimp::StreamWriterLE& s,
+    int indent
+){
+    char buffer[32];
+    FBX::Node node(name);
+    node.Begin(s, false, indent);
+    std::string vsize = to_string(v.size());
+    // *<size> {
+    s.PutChar('*'); s.PutString(vsize); s.PutString(" {\n");
+    // indent + 1
+    for (int i = 0; i < indent + 1; ++i) { s.PutChar('\t'); }
+    // a: value,value,value,...
+    s.PutString("a: ");
+    int count = 0;
+    for (size_t i = 0; i < v.size(); ++i) {
+        if (i > 0) { s.PutChar(','); }
+        int len = ai_snprintf(buffer, sizeof(buffer), "%d", v[i]);
+        count += len;
+        if (count > 2048) { s.PutChar('\n'); count = 0; }
+        if (len < 0 || len > 31) {
+            // this should never happen
+            throw DeadlyExportError("failed to convert double to string");
+        }
+        for (int j = 0; j < len; ++j) { s.PutChar(buffer[j]); }
+    }
+    // }
+    s.PutChar('\n');
+    for (int i = 0; i < indent; ++i) { s.PutChar('\t'); }
+    s.PutChar('}'); s.PutChar(' ');
+    node.End(s, false, indent, false);
+}
+
+// binary property node from vector of doubles
+// TODO: optional zip compression!
+void FBX::Node::WritePropertyNodeBinary(
+    const std::string& name,
+    const std::vector<double>& v,
+    Assimp::StreamWriterLE& s
+){
+    FBX::Node node(name);
+    node.BeginBinary(s);
+    s.PutU1('d');
+    s.PutU4(uint32_t(v.size())); // number of elements
+    s.PutU4(0); // no encoding (1 would be zip-compressed)
+    s.PutU4(uint32_t(v.size()) * 8); // data size
+    for (auto it = v.begin(); it != v.end(); ++it) { s.PutF8(*it); }
+    node.EndPropertiesBinary(s, 1);
+    node.EndBinary(s, false);
+}
+
+// binary property node from vector of int32_t
+// TODO: optional zip compression!
+void FBX::Node::WritePropertyNodeBinary(
+    const std::string& name,
+    const std::vector<int32_t>& v,
+    Assimp::StreamWriterLE& s
+){
+    FBX::Node node(name);
+    node.BeginBinary(s);
+    s.PutU1('i');
+    s.PutU4(uint32_t(v.size())); // number of elements
+    s.PutU4(0); // no encoding (1 would be zip-compressed)
+    s.PutU4(uint32_t(v.size()) * 4); // data size
+    for (auto it = v.begin(); it != v.end(); ++it) { s.PutI4(*it); }
+    node.EndPropertiesBinary(s, 1);
+    node.EndBinary(s, false);
+}
+
+// public static member functions
+
+// convenience function to create and write a property node,
+// holding a single property which is an array of values.
+// does not copy the data, so is efficient for large arrays.
+void FBX::Node::WritePropertyNode(
+    const std::string& name,
+    const std::vector<double>& v,
+    Assimp::StreamWriterLE& s,
+    bool binary, int indent
+){
+    if (binary) {
+        FBX::Node::WritePropertyNodeBinary(name, v, s);
+    } else {
+        FBX::Node::WritePropertyNodeAscii(name, v, s, indent);
+    }
+}
+
+// convenience function to create and write a property node,
+// holding a single property which is an array of values.
+// does not copy the data, so is efficient for large arrays.
+void FBX::Node::WritePropertyNode(
+    const std::string& name,
+    const std::vector<int32_t>& v,
+    Assimp::StreamWriterLE& s,
+    bool binary, int indent
+){
+    if (binary) {
+        FBX::Node::WritePropertyNodeBinary(name, v, s);
+    } else {
+        FBX::Node::WritePropertyNodeAscii(name, v, s, indent);
+    }
+}
+}
+#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
+#endif // ASSIMP_BUILD_NO_EXPORT

thirdparty/assimp/code/FBX/FBXExportNode.h

@@ -0,0 +1,271 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file FBXExportNode.h
+* Declares the FBX::Node helper class for fbx export.
+*/
+#ifndef AI_FBXEXPORTNODE_H_INC
+#define AI_FBXEXPORTNODE_H_INC
+
+#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
+
+#include "FBXExportProperty.h"
+
+#include <assimp/StreamWriter.h> // StreamWriterLE
+
+#include <string>
+#include <vector>
+
+namespace Assimp {
+namespace FBX {
+    class Node;
+}
+
+class FBX::Node {
+public: 
+    // TODO: accessors
+    std::string name; // node name
+    std::vector<FBX::FBXExportProperty> properties; // node properties
+    std::vector<FBX::Node> children; // child nodes
+
+    // some nodes always pretend they have children...
+    bool force_has_children = false;
+
+public: // constructors
+    /// The default class constructor.
+    Node() = default;
+
+    /// The class constructor with the name.
+    Node(const std::string& n)
+    : name(n)
+    , properties()
+    , children()
+    , force_has_children( false ) {
+        // empty
+    }
+
+    // convenience template to construct with properties directly
+    template <typename... More>
+    Node(const std::string& n, const More... more)
+    : name(n)
+    , properties()
+    , children()
+    , force_has_children(false) {
+        AddProperties(more...);
+    }
+
+public: // functions to add properties or children
+    // add a single property to the node
+    template <typename T>
+    void AddProperty(T value) {
+        properties.emplace_back(value);
+    }
+
+    // convenience function to add multiple properties at once
+    template <typename T, typename... More>
+    void AddProperties(T value, More... more) {
+        properties.emplace_back(value);
+        AddProperties(more...);
+    }
+    void AddProperties() {}
+
+    // add a child node directly
+    void AddChild(const Node& node) { children.push_back(node); }
+
+    // convenience function to add a child node with a single property
+    template <typename... More>
+    void AddChild(
+        const std::string& name,
+        More... more
+    ) {
+        FBX::Node c(name);
+        c.AddProperties(more...);
+        children.push_back(c);
+    }
+
+public: // support specifically for dealing with Properties70 nodes
+
+    // it really is simpler to make these all separate functions.
+    // the versions with 'A' suffixes are for animatable properties.
+    // those often follow a completely different format internally in FBX.
+    void AddP70int(const std::string& name, int32_t value);
+    void AddP70bool(const std::string& name, bool value);
+    void AddP70double(const std::string& name, double value);
+    void AddP70numberA(const std::string& name, double value);
+    void AddP70color(const std::string& name, double r, double g, double b);
+    void AddP70colorA(const std::string& name, double r, double g, double b);
+    void AddP70vector(const std::string& name, double x, double y, double z);
+    void AddP70vectorA(const std::string& name, double x, double y, double z);
+    void AddP70string(const std::string& name, const std::string& value);
+    void AddP70enum(const std::string& name, int32_t value);
+    void AddP70time(const std::string& name, int64_t value);
+
+    // template for custom P70 nodes.
+    // anything that doesn't fit in the above can be created manually.
+    template <typename... More>
+    void AddP70(
+        const std::string& name,
+        const std::string& type,
+        const std::string& type2,
+        const std::string& flags,
+        More... more
+    ) {
+        Node n("P");
+        n.AddProperties(name, type, type2, flags, more...);
+        AddChild(n);
+    }
+
+public: // member functions for writing data to a file or stream
+
+    // write the full node to the given file or stream
+    void Dump(
+        std::shared_ptr<Assimp::IOStream> outfile,
+        bool binary, int indent
+    );
+    void Dump(Assimp::StreamWriterLE &s, bool binary, int indent);
+
+    // these other functions are for writing data piece by piece.
+    // they must be used carefully.
+    // for usage examples see FBXExporter.cpp.
+    void Begin(Assimp::StreamWriterLE &s, bool binary, int indent);
+    void DumpProperties(Assimp::StreamWriterLE& s, bool binary, int indent);
+    void EndProperties(Assimp::StreamWriterLE &s, bool binary, int indent);
+    void EndProperties(
+        Assimp::StreamWriterLE &s, bool binary, int indent,
+        size_t num_properties
+    );
+    void BeginChildren(Assimp::StreamWriterLE &s, bool binary, int indent);
+    void DumpChildren(Assimp::StreamWriterLE& s, bool binary, int indent);
+    void End(
+        Assimp::StreamWriterLE &s, bool binary, int indent,
+        bool has_children
+    );
+
+private: // internal functions used for writing
+
+    void DumpBinary(Assimp::StreamWriterLE &s);
+    void DumpAscii(Assimp::StreamWriterLE &s, int indent);
+    void DumpAscii(std::ostream &s, int indent);
+
+    void BeginBinary(Assimp::StreamWriterLE &s);
+    void DumpPropertiesBinary(Assimp::StreamWriterLE& s);
+    void EndPropertiesBinary(Assimp::StreamWriterLE &s);
+    void EndPropertiesBinary(Assimp::StreamWriterLE &s, size_t num_properties);
+    void DumpChildrenBinary(Assimp::StreamWriterLE& s);
+    void EndBinary(Assimp::StreamWriterLE &s, bool has_children);
+
+    void BeginAscii(std::ostream &s, int indent);
+    void DumpPropertiesAscii(std::ostream &s, int indent);
+    void BeginChildrenAscii(std::ostream &s, int indent);
+    void DumpChildrenAscii(std::ostream &s, int indent);
+    void EndAscii(std::ostream &s, int indent, bool has_children);
+
+private: // data used for binary dumps
+    size_t start_pos; // starting position in stream
+    size_t end_pos; // ending position in stream
+    size_t property_start; // starting position of property section
+
+public: // static member functions
+
+    // convenience function to create a node with a single property,
+    // and write it to the stream.
+    template <typename T>
+    static void WritePropertyNode(
+        const std::string& name,
+        const T value,
+        Assimp::StreamWriterLE& s,
+        bool binary, int indent
+    ) {
+        FBX::FBXExportProperty p(value);
+        FBX::Node node(name, p);
+        node.Dump(s, binary, indent);
+    }
+
+    // convenience function to create and write a property node,
+    // holding a single property which is an array of values.
+    // does not copy the data, so is efficient for large arrays.
+    static void WritePropertyNode(
+        const std::string& name,
+        const std::vector<double>& v,
+        Assimp::StreamWriterLE& s,
+        bool binary, int indent
+    );
+
+    // convenience function to create and write a property node,
+    // holding a single property which is an array of values.
+    // does not copy the data, so is efficient for large arrays.
+    static void WritePropertyNode(
+        const std::string& name,
+        const std::vector<int32_t>& v,
+        Assimp::StreamWriterLE& s,
+        bool binary, int indent
+    );
+
+private: // static helper functions
+    static void WritePropertyNodeAscii(
+        const std::string& name,
+        const std::vector<double>& v,
+        Assimp::StreamWriterLE& s,
+        int indent
+    );
+    static void WritePropertyNodeAscii(
+        const std::string& name,
+        const std::vector<int32_t>& v,
+        Assimp::StreamWriterLE& s,
+        int indent
+    );
+    static void WritePropertyNodeBinary(
+        const std::string& name,
+        const std::vector<double>& v,
+        Assimp::StreamWriterLE& s
+    );
+    static void WritePropertyNodeBinary(
+        const std::string& name,
+        const std::vector<int32_t>& v,
+        Assimp::StreamWriterLE& s
+    );
+
+};
+}
+
+#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
+
+#endif // AI_FBXEXPORTNODE_H_INC

thirdparty/assimp/code/FBX/FBXExportProperty.cpp

@@ -0,0 +1,385 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+#ifndef ASSIMP_BUILD_NO_EXPORT
+#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
+
+#include "FBXExportProperty.h"
+
+#include <assimp/StreamWriter.h> // StreamWriterLE
+#include <assimp/Exceptional.h> // DeadlyExportError
+
+#include <string>
+#include <vector>
+#include <ostream>
+#include <locale>
+#include <sstream> // ostringstream
+
+namespace Assimp {
+namespace FBX {
+
+// constructors for single element properties
+
+FBXExportProperty::FBXExportProperty(bool v)
+: type('C')
+, data(1, uint8_t(v)) {}
+
+FBXExportProperty::FBXExportProperty(int16_t v)
+: type('Y')
+, data(2) {
+    uint8_t* d = data.data();
+    (reinterpret_cast<int16_t*>(d))[0] = v;
+}
+
+FBXExportProperty::FBXExportProperty(int32_t v)
+: type('I')
+, data(4) {
+    uint8_t* d = data.data();
+    (reinterpret_cast<int32_t*>(d))[0] = v;
+}
+
+FBXExportProperty::FBXExportProperty(float v)
+: type('F')
+, data(4) {
+    uint8_t* d = data.data();
+    (reinterpret_cast<float*>(d))[0] = v;
+}
+
+FBXExportProperty::FBXExportProperty(double v)
+: type('D')
+, data(8) {
+    uint8_t* d = data.data();
+    (reinterpret_cast<double*>(d))[0] = v;
+}
+
+FBXExportProperty::FBXExportProperty(int64_t v)
+: type('L')
+, data(8) {
+    uint8_t* d = data.data();
+    (reinterpret_cast<int64_t*>(d))[0] = v;
+}
+
+// constructors for array-type properties
+
+FBXExportProperty::FBXExportProperty(const char* c, bool raw)
+: FBXExportProperty(std::string(c), raw) {
+    // empty
+}
+
+// strings can either be saved as "raw" (R) data, or "string" (S) data
+FBXExportProperty::FBXExportProperty(const std::string& s, bool raw)
+: type(raw ? 'R' : 'S')
+, data(s.size()) {
+    for (size_t i = 0; i < s.size(); ++i) {
+        data[i] = uint8_t(s[i]);
+    }
+}
+
+FBXExportProperty::FBXExportProperty(const std::vector<uint8_t>& r)
+: type('R')
+, data(r) {
+    // empty
+}
+
+FBXExportProperty::FBXExportProperty(const std::vector<int32_t>& va)
+: type('i')
+, data(4 * va.size() ) {
+    int32_t* d = reinterpret_cast<int32_t*>(data.data());
+    for (size_t i = 0; i < va.size(); ++i) {
+        d[i] = va[i];
+    }
+}
+
+FBXExportProperty::FBXExportProperty(const std::vector<int64_t>& va)
+: type('l')
+, data(8 * va.size()) {
+    int64_t* d = reinterpret_cast<int64_t*>(data.data());
+    for (size_t i = 0; i < va.size(); ++i) {
+        d[i] = va[i];
+    }
+}
+
+FBXExportProperty::FBXExportProperty(const std::vector<float>& va)
+: type('f')
+, data(4 * va.size()) {
+    float* d = reinterpret_cast<float*>(data.data());
+    for (size_t i = 0; i < va.size(); ++i) {
+        d[i] = va[i];
+    }
+}
+
+FBXExportProperty::FBXExportProperty(const std::vector<double>& va)
+: type('d')
+, data(8 * va.size()) {
+    double* d = reinterpret_cast<double*>(data.data());
+    for (size_t i = 0; i < va.size(); ++i) {
+        d[i] = va[i];
+    }
+}
+
+FBXExportProperty::FBXExportProperty(const aiMatrix4x4& vm)
+: type('d')
+, data(8 * 16) {
+    double* d = reinterpret_cast<double*>(data.data());
+    for (unsigned int c = 0; c < 4; ++c) {
+        for (unsigned int r = 0; r < 4; ++r) {
+            d[4 * c + r] = vm[r][c];
+        }
+    }
+}
+
+// public member functions
+
+size_t FBXExportProperty::size() {
+    switch (type) {
+        case 'C':
+        case 'Y':
+        case 'I':
+        case 'F':
+        case 'D':
+        case 'L':
+            return data.size() + 1;
+        case 'S':
+        case 'R':
+            return data.size() + 5;
+        case 'i':
+        case 'd':
+            return data.size() + 13;
+        default:
+            throw DeadlyExportError("Requested size on property of unknown type");
+    }
+}
+
+void FBXExportProperty::DumpBinary(Assimp::StreamWriterLE& s) {
+    s.PutU1(type);
+    uint8_t* d = data.data();
+    size_t N;
+    switch (type) {
+        case 'C': s.PutU1(*(reinterpret_cast<uint8_t*>(d))); return;
+        case 'Y': s.PutI2(*(reinterpret_cast<int16_t*>(d))); return;
+        case 'I': s.PutI4(*(reinterpret_cast<int32_t*>(d))); return;
+        case 'F': s.PutF4(*(reinterpret_cast<float*>(d))); return;
+        case 'D': s.PutF8(*(reinterpret_cast<double*>(d))); return;
+        case 'L': s.PutI8(*(reinterpret_cast<int64_t*>(d))); return;
+        case 'S':
+        case 'R':
+            s.PutU4(uint32_t(data.size()));
+            for (size_t i = 0; i < data.size(); ++i) { s.PutU1(data[i]); }
+            return;
+        case 'i':
+            N = data.size() / 4;
+            s.PutU4(uint32_t(N)); // number of elements
+            s.PutU4(0); // no encoding (1 would be zip-compressed)
+            // TODO: compress if large?
+            s.PutU4(uint32_t(data.size())); // data size
+            for (size_t i = 0; i < N; ++i) {
+                s.PutI4((reinterpret_cast<int32_t*>(d))[i]);
+            }
+            return;
+        case 'l':
+            N = data.size() / 8;
+            s.PutU4(uint32_t(N)); // number of elements
+            s.PutU4(0); // no encoding (1 would be zip-compressed)
+            // TODO: compress if large?
+            s.PutU4(uint32_t(data.size())); // data size
+            for (size_t i = 0; i < N; ++i) {
+                s.PutI8((reinterpret_cast<int64_t*>(d))[i]);
+            }
+            return;
+        case 'f':
+            N = data.size() / 4;
+            s.PutU4(uint32_t(N)); // number of elements
+            s.PutU4(0); // no encoding (1 would be zip-compressed)
+            // TODO: compress if large?
+            s.PutU4(uint32_t(data.size())); // data size
+            for (size_t i = 0; i < N; ++i) {
+                s.PutF4((reinterpret_cast<float*>(d))[i]);
+            }
+            return;
+        case 'd':
+            N = data.size() / 8;
+            s.PutU4(uint32_t(N)); // number of elements
+            s.PutU4(0); // no encoding (1 would be zip-compressed)
+            // TODO: compress if large?
+            s.PutU4(uint32_t(data.size())); // data size
+            for (size_t i = 0; i < N; ++i) {
+                s.PutF8((reinterpret_cast<double*>(d))[i]);
+            }
+            return;
+        default:
+            std::ostringstream err;
+            err << "Tried to dump property with invalid type '";
+            err << type << "'!";
+            throw DeadlyExportError(err.str());
+    }
+}
+
+void FBXExportProperty::DumpAscii(Assimp::StreamWriterLE& outstream, int indent) {
+    std::ostringstream ss;
+    ss.imbue(std::locale::classic());
+    ss.precision(15); // this seems to match official FBX SDK exports
+    DumpAscii(ss, indent);
+    outstream.PutString(ss.str());
+}
+
+void FBXExportProperty::DumpAscii(std::ostream& s, int indent) {
+    // no writing type... or anything. just shove it into the stream.
+    uint8_t* d = data.data();
+    size_t N;
+    size_t swap = data.size();
+    size_t count = 0;
+    switch (type) {
+    case 'C':
+        if (*(reinterpret_cast<uint8_t*>(d))) { s << 'T'; }
+        else { s << 'F'; }
+        return;
+    case 'Y': s << *(reinterpret_cast<int16_t*>(d)); return;
+    case 'I': s << *(reinterpret_cast<int32_t*>(d)); return;
+    case 'F': s << *(reinterpret_cast<float*>(d)); return;
+    case 'D': s << *(reinterpret_cast<double*>(d)); return;
+    case 'L': s << *(reinterpret_cast<int64_t*>(d)); return;
+    case 'S':
+        // first search to see if it has "\x00\x01" in it -
+        // which separates fields which are reversed in the ascii version.
+        // yeah.
+        // FBX, yeah.
+        for (size_t i = 0; i < data.size(); ++i) {
+            if (data[i] == '\0') {
+                swap = i;
+                break;
+            }
+        }
+    case 'R':
+        s << '"';
+        // we might as well check this now,
+        // probably it will never happen
+        for (size_t i = 0; i < data.size(); ++i) {
+            char c = data[i];
+            if (c == '"') {
+                throw runtime_error("can't handle quotes in property string");
+            }
+        }
+        // first write the SWAPPED member (if any)
+        for (size_t i = swap + 2; i < data.size(); ++i) {
+            char c = data[i];
+            s << c;
+        }
+        // then a separator
+        if (swap != data.size()) {
+            s << "::";
+        }
+        // then the initial member
+        for (size_t i = 0; i < swap; ++i) {
+            char c = data[i];
+            s << c;
+        }
+        s << '"';
+        return;
+    case 'i':
+        N = data.size() / 4; // number of elements
+        s << '*' << N << " {\n";
+        for (int i = 0; i < indent + 1; ++i) { s << '\t'; }
+        s << "a: ";
+        for (size_t i = 0; i < N; ++i) {
+            if (i > 0) { s << ','; }
+            if (count++ > 120) { s << '\n'; count = 0; }
+            s << (reinterpret_cast<int32_t*>(d))[i];
+        }
+        s << '\n';
+        for (int i = 0; i < indent; ++i) { s << '\t'; }
+        s << "} ";
+        return;
+    case 'l':
+        N = data.size() / 8;
+        s << '*' << N << " {\n";
+        for (int i = 0; i < indent + 1; ++i) { s << '\t'; }
+        s << "a: ";
+        for (size_t i = 0; i < N; ++i) {
+            if (i > 0) { s << ','; }
+            if (count++ > 120) { s << '\n'; count = 0; }
+            s << (reinterpret_cast<int64_t*>(d))[i];
+        }
+        s << '\n';
+        for (int i = 0; i < indent; ++i) { s << '\t'; }
+        s << "} ";
+        return;
+    case 'f':
+        N = data.size() / 4;
+        s << '*' << N << " {\n";
+        for (int i = 0; i < indent + 1; ++i) { s << '\t'; }
+        s << "a: ";
+        for (size_t i = 0; i < N; ++i) {
+            if (i > 0) { s << ','; }
+            if (count++ > 120) { s << '\n'; count = 0; }
+            s << (reinterpret_cast<float*>(d))[i];
+        }
+        s << '\n';
+        for (int i = 0; i < indent; ++i) { s << '\t'; }
+        s << "} ";
+        return;
+    case 'd':
+        N = data.size() / 8;
+        s << '*' << N << " {\n";
+        for (int i = 0; i < indent + 1; ++i) { s << '\t'; }
+        s << "a: ";
+        // set precision to something that can handle doubles
+        s.precision(15);
+        for (size_t i = 0; i < N; ++i) {
+            if (i > 0) { s << ','; }
+            if (count++ > 120) { s << '\n'; count = 0; }
+            s << (reinterpret_cast<double*>(d))[i];
+        }
+        s << '\n';
+        for (int i = 0; i < indent; ++i) { s << '\t'; }
+        s << "} ";
+        return;
+    default:
+        std::ostringstream err;
+        err << "Tried to dump property with invalid type '";
+        err << type << "'!";
+        throw runtime_error(err.str());
+    }
+}
+
+} // Namespace FBX
+} // Namespace Assimp
+
+#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
+#endif // ASSIMP_BUILD_NO_EXPORT

thirdparty/assimp/code/FBX/FBXExportProperty.h

@@ -0,0 +1,129 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file FBXExportProperty.h
+* Declares the FBX::Property helper class for fbx export.
+*/
+#ifndef AI_FBXEXPORTPROPERTY_H_INC
+#define AI_FBXEXPORTPROPERTY_H_INC
+
+#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
+
+#include <assimp/types.h> // aiMatrix4x4
+#include <assimp/StreamWriter.h> // StreamWriterLE
+
+#include <string>
+#include <vector>
+#include <ostream>
+#include <type_traits> // is_void
+
+namespace Assimp {
+namespace FBX {
+
+/** @brief FBX::Property
+ *
+ *  Holds a value of any of FBX's recognized types,
+ *  each represented by a particular one-character code.
+ *  C : 1-byte uint8, usually 0x00 or 0x01 to represent boolean false and true
+ *  Y : 2-byte int16
+ *  I : 4-byte int32
+ *  F : 4-byte float
+ *  D : 8-byte double
+ *  L : 8-byte int64
+ *  i : array of int32
+ *  f : array of float
+ *  d : array of double
+ *  l : array of int64
+ *  b : array of 1-byte booleans (0x00 or 0x01)
+ *  S : string (array of 1-byte char)
+ *  R : raw data (array of bytes)
+ */
+class FBXExportProperty {
+public:
+    // constructors for basic types.
+    // all explicit to avoid accidental typecasting
+    explicit FBXExportProperty(bool v);
+    // TODO: determine if there is actually a byte type,
+    // or if this always means <bool>. 'C' seems to imply <char>,
+    // so possibly the above was intended to represent both.
+    explicit FBXExportProperty(int16_t v);
+    explicit FBXExportProperty(int32_t v);
+    explicit FBXExportProperty(float v);
+    explicit FBXExportProperty(double v);
+    explicit FBXExportProperty(int64_t v);
+    // strings can either be stored as 'R' (raw) or 'S' (string) type
+    explicit FBXExportProperty(const char* c, bool raw = false);
+    explicit FBXExportProperty(const std::string& s, bool raw = false);
+    explicit FBXExportProperty(const std::vector<uint8_t>& r);
+    explicit FBXExportProperty(const std::vector<int32_t>& va);
+    explicit FBXExportProperty(const std::vector<int64_t>& va);
+    explicit FBXExportProperty(const std::vector<double>& va);
+    explicit FBXExportProperty(const std::vector<float>& va);
+    explicit FBXExportProperty(const aiMatrix4x4& vm);
+
+    // this will catch any type not defined above,
+    // so that we don't accidentally convert something we don't want.
+    // for example (const char*) --> (bool)... seriously wtf C++
+    template <class T>
+    explicit FBXExportProperty(T v) : type('X') {
+        static_assert(std::is_void<T>::value, "TRIED TO CREATE FBX PROPERTY WITH UNSUPPORTED TYPE, CHECK YOUR PROPERTY INSTANTIATION");
+    } // note: no line wrap so it appears verbatim on the compiler error
+
+    // the size of this property node in a binary file, in bytes
+    size_t size();
+
+    // write this property node as binary data to the given stream
+    void DumpBinary(Assimp::StreamWriterLE& s);
+    void DumpAscii(Assimp::StreamWriterLE& s, int indent = 0);
+    void DumpAscii(std::ostream& s, int indent = 0);
+    // note: make sure the ostream is in classic "C" locale
+
+private:
+    char type;
+    std::vector<uint8_t> data;
+};
+
+} // Namespace FBX
+} // Namespace Assimp
+
+#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
+
+#endif // AI_FBXEXPORTPROPERTY_H_INC

thirdparty/assimp/code/FBX/FBXExporter.h

@@ -0,0 +1,178 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file FBXExporter.h
+* Declares the exporter class to write a scene to an fbx file
+*/
+#ifndef AI_FBXEXPORTER_H_INC
+#define AI_FBXEXPORTER_H_INC
+
+#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
+
+#include "FBXExportNode.h" // FBX::Node
+#include "FBXCommon.h" // FBX::TransformInheritance
+
+#include <assimp/types.h>
+//#include <assimp/material.h>
+#include <assimp/StreamWriter.h> // StreamWriterLE
+#include <assimp/Exceptional.h> // DeadlyExportError
+
+#include <vector>
+#include <map>
+#include <unordered_set>
+#include <memory> // shared_ptr
+#include <sstream> // stringstream
+
+struct aiScene;
+struct aiNode;
+//struct aiMaterial;
+
+namespace Assimp
+{
+    class IOSystem;
+    class IOStream;
+    class ExportProperties;
+
+    // ---------------------------------------------------------------------
+    /** Helper class to export a given scene to an FBX file. */
+    // ---------------------------------------------------------------------
+    class FBXExporter
+    {
+    public:
+        /// Constructor for a specific scene to export
+        FBXExporter(const aiScene* pScene, const ExportProperties* pProperties);
+
+        // call one of these methods to export
+        void ExportBinary(const char* pFile, IOSystem* pIOSystem);
+        void ExportAscii(const char* pFile, IOSystem* pIOSystem);
+
+    private:
+        bool binary; // whether current export is in binary or ascii format
+        const aiScene* mScene; // the scene to export
+        const ExportProperties* mProperties; // currently unused
+        std::shared_ptr<IOStream> outfile; // file to write to
+
+        std::vector<FBX::Node> connections; // connection storage
+
+        std::vector<int64_t> mesh_uids;
+        std::vector<int64_t> material_uids;
+        std::map<const aiNode*,int64_t> node_uids;
+
+        // this crude unique-ID system is actually fine
+        int64_t last_uid = 999999;
+        int64_t generate_uid() { return ++last_uid; }
+
+        // binary files have a specific header and footer,
+        // in addition to the actual data
+        void WriteBinaryHeader();
+        void WriteBinaryFooter();
+
+        // ascii files have a comment at the top
+        void WriteAsciiHeader();
+
+        // WriteAllNodes does the actual export.
+        // It just calls all the Write<Section> methods below in order.
+        void WriteAllNodes();
+
+        // Methods to write individual sections.
+        // The order here matches the order inside an FBX file.
+        // Each method corresponds to a top-level FBX section,
+        // except WriteHeader which also includes some binary-only sections
+        // and WriteFooter which is binary data only.
+        void WriteHeaderExtension();
+        // WriteFileId(); // binary-only, included in WriteHeader
+        // WriteCreationTime(); // binary-only, included in WriteHeader
+        // WriteCreator(); // binary-only, included in WriteHeader
+        void WriteGlobalSettings();
+        void WriteDocuments();
+        void WriteReferences();
+        void WriteDefinitions();
+        void WriteObjects();
+        void WriteConnections();
+        // WriteTakes(); // deprecated since at least 2015 (fbx 7.4)
+
+        // helpers
+        void WriteAsciiSectionHeader(const std::string& title);
+        void WriteModelNodes(
+            Assimp::StreamWriterLE& s,
+            const aiNode* node,
+            int64_t parent_uid,
+            const std::unordered_set<const aiNode*>& limbnodes
+        );
+        void WriteModelNodes( // usually don't call this directly
+            StreamWriterLE& s,
+            const aiNode* node,
+            int64_t parent_uid,
+            const std::unordered_set<const aiNode*>& limbnodes,
+            std::vector<std::pair<std::string,aiVector3D>>& transform_chain
+        );
+        void WriteModelNode( // nor this
+            StreamWriterLE& s,
+            bool binary,
+            const aiNode* node,
+            int64_t node_uid,
+            const std::string& type,
+            const std::vector<std::pair<std::string,aiVector3D>>& xfm_chain,
+            FBX::TransformInheritance ti_type=FBX::TransformInheritance_RSrs
+        );
+        void WriteAnimationCurveNode(
+            StreamWriterLE& outstream,
+            int64_t uid,
+            const std::string& name, // "T", "R", or "S"
+            aiVector3D default_value,
+            std::string property_name, // "Lcl Translation" etc
+            int64_t animation_layer_uid,
+            int64_t node_uid
+        );
+        void WriteAnimationCurve(
+            StreamWriterLE& outstream,
+            double default_value,
+            const std::vector<int64_t>& times,
+            const std::vector<float>& values,
+            int64_t curvenode_id,
+            const std::string& property_link // "d|X", "d|Y", etc
+        );
+    };
+}
+
+#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
+
+#endif // AI_FBXEXPORTER_H_INC

thirdparty/assimp/code/FBX/FBXImportSettings.h

@@ -0,0 +1,164 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXImportSettings.h
+ *  @brief FBX importer runtime configuration
+ */
+#ifndef INCLUDED_AI_FBX_IMPORTSETTINGS_H
+#define INCLUDED_AI_FBX_IMPORTSETTINGS_H
+
+namespace Assimp {
+namespace FBX {
+
+/** FBX import settings, parts of which are publicly accessible via their corresponding AI_CONFIG constants */
+struct ImportSettings
+{
+    ImportSettings()
+    : strictMode(true)
+    , readAllLayers(true)
+    , readAllMaterials(false)
+    , readMaterials(true)
+    , readTextures(true)
+    , readCameras(true)
+    , readLights(true)
+    , readAnimations(true)
+    , readWeights(true)
+    , preservePivots(true)
+    , optimizeEmptyAnimationCurves(true)
+    , useLegacyEmbeddedTextureNaming(false)
+    , removeEmptyBones( true )
+    , convertToMeters( false ) {
+        // empty
+    }
+
+
+    /** enable strict mode:
+     *   - only accept fbx 2012, 2013 files
+     *   - on the slightest error, give up.
+     *
+     *  Basically, strict mode means that the fbx file will actually
+     *  be validated. Strict mode is off by default. */
+    bool strictMode;
+
+    /** specifies whether all geometry layers are read and scanned for
+      * usable data channels. The FBX spec indicates that many readers
+      * will only read the first channel and that this is in some way
+      * the recommended way- in reality, however, it happens a lot that
+      * vertex data is spread among multiple layers. The default
+      * value for this option is true.*/
+    bool readAllLayers;
+
+    /** specifies whether all materials are read, or only those that
+     *  are referenced by at least one mesh. Reading all materials
+     *  may make FBX reading a lot slower since all objects
+     *  need to be processed .
+     *  This bit is ignored unless readMaterials=true*/
+    bool readAllMaterials;
+
+
+    /** import materials (true) or skip them and assign a default
+     *  material. The default value is true.*/
+    bool readMaterials;
+
+    /** import embedded textures? Default value is true.*/
+    bool readTextures;
+
+    /** import cameras? Default value is true.*/
+    bool readCameras;
+
+    /** import light sources? Default value is true.*/
+    bool readLights;
+
+    /** import animations (i.e. animation curves, the node
+     *  skeleton is always imported). Default value is true. */
+    bool readAnimations;
+
+    /** read bones (vertex weights and deform info).
+     *  Default value is true. */
+    bool readWeights;
+
+    /** preserve transformation pivots and offsets. Since these can
+     *  not directly be represented in assimp, additional dummy
+     *  nodes will be generated. Note that settings this to false
+     *  can make animation import a lot slower. The default value
+     *  is true.
+     *
+     *  The naming scheme for the generated nodes is:
+     *    <OriginalName>_$AssimpFbx$_<TransformName>
+     *
+     *  where <TransformName> is one of
+     *    RotationPivot
+     *    RotationOffset
+     *    PreRotation
+     *    PostRotation
+     *    ScalingPivot
+     *    ScalingOffset
+     *    Translation
+     *    Scaling
+     *    Rotation
+     **/
+    bool preservePivots;
+
+    /** do not import animation curves that specify a constant
+     *  values matching the corresponding node transformation.
+     *  The default value is true. */
+    bool optimizeEmptyAnimationCurves;
+
+    /** use legacy naming for embedded textures eg: (*0, *1, *2)
+    */
+    bool useLegacyEmbeddedTextureNaming;
+
+    /** Empty bones shall be removed
+    */
+    bool removeEmptyBones;
+
+    /** Set to true to perform a conversion from cm to meter after the import
+    */
+    bool convertToMeters;
+};
+
+
+} // !FBX
+} // !Assimp
+
+#endif
+

thirdparty/assimp/code/FBX/FBXImporter.cpp

@@ -0,0 +1,206 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+r
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXImporter.cpp
+ *  @brief Implementation of the FBX importer.
+ */
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+#include "FBXImporter.h"
+
+#include "FBXTokenizer.h"
+#include "FBXParser.h"
+#include "FBXUtil.h"
+#include "FBXDocument.h"
+#include "FBXConverter.h"
+
+#include <assimp/StreamReader.h>
+#include <assimp/MemoryIOWrapper.h>
+#include <assimp/Importer.hpp>
+#include <assimp/importerdesc.h>
+
+namespace Assimp {
+
+template<>
+const char* LogFunctions<FBXImporter>::Prefix() {
+    static auto prefix = "FBX: ";
+    return prefix;
+}
+
+}
+
+using namespace Assimp;
+using namespace Assimp::Formatter;
+using namespace Assimp::FBX;
+
+namespace {
+
+static const aiImporterDesc desc = {
+    "Autodesk FBX Importer",
+    "",
+    "",
+    "",
+    aiImporterFlags_SupportTextFlavour,
+    0,
+    0,
+    0,
+    0,
+    "fbx"
+};
+}
+
+// ------------------------------------------------------------------------------------------------
+// Constructor to be privately used by #Importer
+FBXImporter::FBXImporter()
+{
+}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well
+FBXImporter::~FBXImporter()
+{
+}
+
+// ------------------------------------------------------------------------------------------------
+// Returns whether the class can handle the format of the given file.
+bool FBXImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const
+{
+    const std::string& extension = GetExtension(pFile);
+    if (extension == std::string( desc.mFileExtensions ) ) {
+        return true;
+    }
+
+    else if ((!extension.length() || checkSig) && pIOHandler)   {
+        // at least ASCII-FBX files usually have a 'FBX' somewhere in their head
+        const char* tokens[] = {"fbx"};
+        return SearchFileHeaderForToken(pIOHandler,pFile,tokens,1);
+    }
+    return false;
+}
+
+// ------------------------------------------------------------------------------------------------
+// List all extensions handled by this loader
+const aiImporterDesc* FBXImporter::GetInfo () const
+{
+    return &desc;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Setup configuration properties for the loader
+void FBXImporter::SetupProperties(const Importer* pImp)
+{
+    settings.readAllLayers = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_ALL_GEOMETRY_LAYERS, true);
+    settings.readAllMaterials = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_ALL_MATERIALS, false);
+    settings.readMaterials = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_MATERIALS, true);
+    settings.readTextures = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_TEXTURES, true);
+    settings.readCameras = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_CAMERAS, true);
+    settings.readLights = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_LIGHTS, true);
+    settings.readAnimations = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_ANIMATIONS, true);
+    settings.strictMode = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_STRICT_MODE, false);
+    settings.preservePivots = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_PRESERVE_PIVOTS, true);
+    settings.optimizeEmptyAnimationCurves = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_OPTIMIZE_EMPTY_ANIMATION_CURVES, true);
+    settings.useLegacyEmbeddedTextureNaming = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_EMBEDDED_TEXTURES_LEGACY_NAMING, false);
+    settings.removeEmptyBones = pImp->GetPropertyBool(AI_CONFIG_IMPORT_REMOVE_EMPTY_BONES, true);
+    settings.convertToMeters = pImp->GetPropertyBool(AI_CONFIG_FBX_CONVERT_TO_M, false);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Imports the given file into the given scene structure.
+void FBXImporter::InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler)
+{
+    std::unique_ptr<IOStream> stream(pIOHandler->Open(pFile,"rb"));
+    if (!stream) {
+        ThrowException("Could not open file for reading");
+    }
+
+    // read entire file into memory - no streaming for this, fbx
+    // files can grow large, but the assimp output data structure
+    // then becomes very large, too. Assimp doesn't support
+    // streaming for its output data structures so the net win with
+    // streaming input data would be very low.
+    std::vector<char> contents;
+    contents.resize(stream->FileSize()+1);
+    stream->Read( &*contents.begin(), 1, contents.size()-1 );
+    contents[ contents.size() - 1 ] = 0;
+    const char* const begin = &*contents.begin();
+
+    // broadphase tokenizing pass in which we identify the core
+    // syntax elements of FBX (brackets, commas, key:value mappings)
+    TokenList tokens;
+    try {
+
+        bool is_binary = false;
+        if (!strncmp(begin,"Kaydara FBX Binary",18)) {
+            is_binary = true;
+            TokenizeBinary(tokens,begin,contents.size());
+        }
+        else {
+            Tokenize(tokens,begin);
+        }
+
+        // use this information to construct a very rudimentary
+        // parse-tree representing the FBX scope structure
+        Parser parser(tokens, is_binary);
+
+        // take the raw parse-tree and convert it to a FBX DOM
+        Document doc(parser,settings);
+
+        // convert the FBX DOM to aiScene
+        ConvertToAssimpScene(pScene, doc, settings.removeEmptyBones);
+
+        // size relative to cm
+        float size_relative_to_cm = doc.GlobalSettings().UnitScaleFactor();
+
+        // Set FBX file scale is relative to CM must be converted to M for
+        // assimp universal format (M)
+        SetFileScale( size_relative_to_cm * 0.01f);
+
+        std::for_each(tokens.begin(),tokens.end(),Util::delete_fun<Token>());
+    }
+    catch(std::exception&) {
+        std::for_each(tokens.begin(),tokens.end(),Util::delete_fun<Token>());
+        throw;
+    }
+}
+
+#endif // !ASSIMP_BUILD_NO_FBX_IMPORTER

thirdparty/assimp/code/FBX/FBXImporter.h

@@ -0,0 +1,100 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXImporter.h
+ *  @brief Declaration of the FBX main importer class
+ */
+#ifndef INCLUDED_AI_FBX_IMPORTER_H
+#define INCLUDED_AI_FBX_IMPORTER_H
+
+#include <assimp/BaseImporter.h>
+#include <assimp/LogAux.h>
+
+#include "FBXImportSettings.h"
+
+namespace Assimp    {
+
+// TinyFormatter.h
+namespace Formatter {
+    template <typename T,typename TR, typename A> class basic_formatter;
+    typedef class basic_formatter< char, std::char_traits<char>, std::allocator<char> > format;
+}
+
+// -------------------------------------------------------------------------------------------
+/** Load the Autodesk FBX file format.
+
+ See http://en.wikipedia.org/wiki/FBX
+*/
+// -------------------------------------------------------------------------------------------
+class FBXImporter : public BaseImporter, public LogFunctions<FBXImporter>
+{
+public:
+    FBXImporter();
+    virtual ~FBXImporter();
+
+    // --------------------
+    bool CanRead( const std::string& pFile,
+        IOSystem* pIOHandler,
+        bool checkSig
+    ) const;
+
+protected:
+
+    // --------------------
+    const aiImporterDesc* GetInfo () const;
+
+    // --------------------
+    void SetupProperties(const Importer* pImp);
+
+    // --------------------
+    void InternReadFile( const std::string& pFile,
+        aiScene* pScene,
+        IOSystem* pIOHandler
+    );
+
+private:
+    FBX::ImportSettings settings;
+}; // !class FBXImporter
+
+} // end of namespace Assimp
+#endif // !INCLUDED_AI_FBX_IMPORTER_H
+

thirdparty/assimp/code/FBX/FBXMaterial.cpp

@@ -0,0 +1,405 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXMaterial.cpp
+ *  @brief Assimp::FBX::Material and Assimp::FBX::Texture implementation
+ */
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+#include "FBXParser.h"
+#include "FBXDocument.h"
+#include "FBXImporter.h"
+#include "FBXImportSettings.h"
+#include "FBXDocumentUtil.h"
+#include "FBXProperties.h"
+#include <assimp/ByteSwapper.h>
+
+#include <algorithm> // std::transform
+#include "FBXUtil.h"
+
+namespace Assimp {
+namespace FBX {
+
+    using namespace Util;
+
+// ------------------------------------------------------------------------------------------------
+Material::Material(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+: Object(id,element,name)
+{
+    const Scope& sc = GetRequiredScope(element);
+
+    const Element* const ShadingModel = sc["ShadingModel"];
+    const Element* const MultiLayer = sc["MultiLayer"];
+
+    if(MultiLayer) {
+        multilayer = !!ParseTokenAsInt(GetRequiredToken(*MultiLayer,0));
+    }
+
+    if(ShadingModel) {
+        shading = ParseTokenAsString(GetRequiredToken(*ShadingModel,0));
+    }
+    else {
+        DOMWarning("shading mode not specified, assuming phong",&element);
+        shading = "phong";
+    }
+
+    std::string templateName;
+
+    // lower-case shading because Blender (for example) writes "Phong"
+    std::transform(shading.begin(), shading.end(), shading.begin(), ::tolower);
+    if(shading == "phong") {
+        templateName = "Material.FbxSurfacePhong";
+    }
+    else if(shading == "lambert") {
+        templateName = "Material.FbxSurfaceLambert";
+    }
+    else {
+        DOMWarning("shading mode not recognized: " + shading,&element);
+    }
+
+    props = GetPropertyTable(doc,templateName,element,sc);
+
+    // resolve texture links
+    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID());
+    for(const Connection* con : conns) {
+
+        // texture link to properties, not objects
+        if (!con->PropertyName().length()) {
+            continue;
+        }
+
+        const Object* const ob = con->SourceObject();
+        if(!ob) {
+            DOMWarning("failed to read source object for texture link, ignoring",&element);
+            continue;
+        }
+
+        const Texture* const tex = dynamic_cast<const Texture*>(ob);
+        if(!tex) {
+            const LayeredTexture* const layeredTexture = dynamic_cast<const LayeredTexture*>(ob);
+            if(!layeredTexture) {
+                DOMWarning("source object for texture link is not a texture or layered texture, ignoring",&element);
+                continue;
+            }
+            const std::string& prop = con->PropertyName();
+            if (layeredTextures.find(prop) != layeredTextures.end()) {
+                DOMWarning("duplicate layered texture link: " + prop,&element);
+            }
+
+            layeredTextures[prop] = layeredTexture;
+            ((LayeredTexture*)layeredTexture)->fillTexture(doc);
+        }
+        else
+        {
+            const std::string& prop = con->PropertyName();
+            if (textures.find(prop) != textures.end()) {
+                DOMWarning("duplicate texture link: " + prop,&element);
+            }
+
+            textures[prop] = tex;
+        }
+
+    }
+}
+
+
+// ------------------------------------------------------------------------------------------------
+Material::~Material()
+{
+}
+
+
+// ------------------------------------------------------------------------------------------------
+Texture::Texture(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+: Object(id,element,name)
+, uvScaling(1.0f,1.0f)
+, media(0)
+{
+    const Scope& sc = GetRequiredScope(element);
+
+    const Element* const Type = sc["Type"];
+    const Element* const FileName = sc["FileName"];
+    const Element* const RelativeFilename = sc["RelativeFilename"];
+    const Element* const ModelUVTranslation = sc["ModelUVTranslation"];
+    const Element* const ModelUVScaling = sc["ModelUVScaling"];
+    const Element* const Texture_Alpha_Source = sc["Texture_Alpha_Source"];
+    const Element* const Cropping = sc["Cropping"];
+
+    if(Type) {
+        type = ParseTokenAsString(GetRequiredToken(*Type,0));
+    }
+
+    if(FileName) {
+        fileName = ParseTokenAsString(GetRequiredToken(*FileName,0));
+    }
+
+    if(RelativeFilename) {
+        relativeFileName = ParseTokenAsString(GetRequiredToken(*RelativeFilename,0));
+    }
+
+    if(ModelUVTranslation) {
+        uvTrans = aiVector2D(ParseTokenAsFloat(GetRequiredToken(*ModelUVTranslation,0)),
+            ParseTokenAsFloat(GetRequiredToken(*ModelUVTranslation,1))
+        );
+    }
+
+    if(ModelUVScaling) {
+        uvScaling = aiVector2D(ParseTokenAsFloat(GetRequiredToken(*ModelUVScaling,0)),
+            ParseTokenAsFloat(GetRequiredToken(*ModelUVScaling,1))
+        );
+    }
+
+    if(Cropping) {
+        crop[0] = ParseTokenAsInt(GetRequiredToken(*Cropping,0));
+        crop[1] = ParseTokenAsInt(GetRequiredToken(*Cropping,1));
+        crop[2] = ParseTokenAsInt(GetRequiredToken(*Cropping,2));
+        crop[3] = ParseTokenAsInt(GetRequiredToken(*Cropping,3));
+    }
+    else {
+        // vc8 doesn't support the crop() syntax in initialization lists
+        // (and vc9 WARNS about the new (i.e. compliant) behaviour).
+        crop[0] = crop[1] = crop[2] = crop[3] = 0;
+    }
+
+    if(Texture_Alpha_Source) {
+        alphaSource = ParseTokenAsString(GetRequiredToken(*Texture_Alpha_Source,0));
+    }
+
+    props = GetPropertyTable(doc,"Texture.FbxFileTexture",element,sc);
+
+    // 3DS Max and FBX SDK use "Scaling" and "Translation" instead of "ModelUVScaling" and "ModelUVTranslation". Use these properties if available.
+    bool ok;
+    const aiVector3D& scaling = PropertyGet<aiVector3D>(*props, "Scaling", ok);
+    if (ok) {
+        uvScaling.x = scaling.x;
+        uvScaling.y = scaling.y;
+    }
+
+    const aiVector3D& trans = PropertyGet<aiVector3D>(*props, "Translation", ok);
+    if (ok) {
+        uvTrans.x = trans.x;
+        uvTrans.y = trans.y;
+    }
+
+    // resolve video links
+    if(doc.Settings().readTextures) {
+        const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID());
+        for(const Connection* con : conns) {
+            const Object* const ob = con->SourceObject();
+            if(!ob) {
+                DOMWarning("failed to read source object for texture link, ignoring",&element);
+                continue;
+            }
+
+            const Video* const video = dynamic_cast<const Video*>(ob);
+            if(video) {
+                media = video;
+            }
+        }
+    }
+}
+
+
+Texture::~Texture()
+{
+
+}
+
+LayeredTexture::LayeredTexture(uint64_t id, const Element& element, const Document& /*doc*/, const std::string& name)
+: Object(id,element,name)
+,blendMode(BlendMode_Modulate)
+,alpha(1)
+{
+    const Scope& sc = GetRequiredScope(element);
+
+    const Element* const BlendModes = sc["BlendModes"];
+    const Element* const Alphas = sc["Alphas"];
+
+
+    if(BlendModes!=0)
+    {
+        blendMode = (BlendMode)ParseTokenAsInt(GetRequiredToken(*BlendModes,0));
+    }
+    if(Alphas!=0)
+    {
+        alpha = ParseTokenAsFloat(GetRequiredToken(*Alphas,0));
+    }
+}
+
+LayeredTexture::~LayeredTexture()
+{
+    
+}
+
+void LayeredTexture::fillTexture(const Document& doc)
+{
+    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID());
+    for(size_t i = 0; i < conns.size();++i)
+    {
+        const Connection* con = conns.at(i);
+
+        const Object* const ob = con->SourceObject();
+        if(!ob) {
+            DOMWarning("failed to read source object for texture link, ignoring",&element);
+            continue;
+        }
+
+        const Texture* const tex = dynamic_cast<const Texture*>(ob);
+
+        textures.push_back(tex);
+    }
+}
+
+
+// ------------------------------------------------------------------------------------------------
+Video::Video(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+: Object(id,element,name)
+, contentLength(0)
+, content(0)
+{
+    const Scope& sc = GetRequiredScope(element);
+
+    const Element* const Type = sc["Type"];
+    const Element* const FileName = sc.FindElementCaseInsensitive("FileName");  //some files retain the information as "Filename", others "FileName", who knows
+    const Element* const RelativeFilename = sc["RelativeFilename"];
+    const Element* const Content = sc["Content"];
+
+    if(Type) {
+        type = ParseTokenAsString(GetRequiredToken(*Type,0));
+    }
+
+    if(FileName) {
+        fileName = ParseTokenAsString(GetRequiredToken(*FileName,0));
+    }
+
+    if(RelativeFilename) {
+        relativeFileName = ParseTokenAsString(GetRequiredToken(*RelativeFilename,0));
+    }
+
+    if(Content && !Content->Tokens().empty()) {
+        //this field is omitted when the embedded texture is already loaded, let's ignore if it's not found
+        try {
+            const Token& token = GetRequiredToken(*Content, 0);
+            const char* data = token.begin();
+            if (!token.IsBinary()) {
+                if (*data != '"') {
+                    DOMError("embedded content is not surrounded by quotation marks", &element);
+                }
+                else {
+                    size_t targetLength = 0;
+                    auto numTokens = Content->Tokens().size();
+                    // First time compute size (it could be large like 64Gb and it is good to allocate it once)
+                    for (uint32_t tokenIdx = 0; tokenIdx < numTokens; ++tokenIdx)
+                    {
+                        const Token& dataToken = GetRequiredToken(*Content, tokenIdx);
+                        size_t tokenLength = dataToken.end() - dataToken.begin() - 2; // ignore double quotes
+                        const char* base64data = dataToken.begin() + 1;
+                        const size_t outLength = Util::ComputeDecodedSizeBase64(base64data, tokenLength);
+                        if (outLength == 0)
+                        {
+                            DOMError("Corrupted embedded content found", &element);
+                        }
+                        targetLength += outLength;
+                    }
+                    if (targetLength == 0)
+                    {
+                        DOMError("Corrupted embedded content found", &element);
+                    }
+                    content = new uint8_t[targetLength];
+                    contentLength = static_cast<uint64_t>(targetLength);
+                    size_t dst_offset = 0;
+                    for (uint32_t tokenIdx = 0; tokenIdx < numTokens; ++tokenIdx)
+                    {
+                        const Token& dataToken = GetRequiredToken(*Content, tokenIdx);
+                        size_t tokenLength = dataToken.end() - dataToken.begin() - 2; // ignore double quotes
+                        const char* base64data = dataToken.begin() + 1;
+                        dst_offset += Util::DecodeBase64(base64data, tokenLength, content + dst_offset, targetLength - dst_offset);
+                    }
+                    if (targetLength != dst_offset)
+                    {
+                        delete[] content;
+                        contentLength = 0;
+                        DOMError("Corrupted embedded content found", &element);
+                    }
+                }
+            }
+            else if (static_cast<size_t>(token.end() - data) < 5) {
+                DOMError("binary data array is too short, need five (5) bytes for type signature and element count", &element);
+            }
+            else if (*data != 'R') {
+                DOMWarning("video content is not raw binary data, ignoring", &element);
+            }
+            else {
+                // read number of elements
+                uint32_t len = 0;
+                ::memcpy(&len, data + 1, sizeof(len));
+                AI_SWAP4(len);
+
+                contentLength = len;
+
+                content = new uint8_t[len];
+                ::memcpy(content, data + 5, len);
+            }
+        } catch (const runtime_error& runtimeError)
+        {
+            //we don't need the content data for contents that has already been loaded
+            ASSIMP_LOG_DEBUG_F("Caught exception in FBXMaterial (likely because content was already loaded): ",
+                    runtimeError.what());
+        }
+    }
+
+    props = GetPropertyTable(doc,"Video.FbxVideo",element,sc);
+}
+
+
+Video::~Video()
+{
+    if(content) {
+        delete[] content;
+    }
+}
+
+} //!FBX
+} //!Assimp
+
+#endif

thirdparty/assimp/code/FBX/FBXMeshGeometry.cpp

@@ -0,0 +1,709 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXMeshGeometry.cpp
+ *  @brief Assimp::FBX::MeshGeometry implementation
+ */
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+#include <functional>
+
+#include "FBXMeshGeometry.h"
+#include "FBXDocument.h"
+#include "FBXImporter.h"
+#include "FBXImportSettings.h"
+#include "FBXDocumentUtil.h"
+
+
+namespace Assimp {
+namespace FBX {
+
+using namespace Util;
+
+// ------------------------------------------------------------------------------------------------
+Geometry::Geometry(uint64_t id, const Element& element, const std::string& name, const Document& doc)
+    : Object(id, element, name)
+    , skin()
+{
+    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(),"Deformer");
+    for(const Connection* con : conns) {
+        const Skin* const sk = ProcessSimpleConnection<Skin>(*con, false, "Skin -> Geometry", element);
+        if(sk) {
+            skin = sk;
+        }
+        const BlendShape* const bsp = ProcessSimpleConnection<BlendShape>(*con, false, "BlendShape -> Geometry", element);
+        if (bsp) {
+            blendShapes.push_back(bsp);
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+Geometry::~Geometry()
+{
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+const std::vector<const BlendShape*>& Geometry::GetBlendShapes() const {
+    return blendShapes;
+}
+
+// ------------------------------------------------------------------------------------------------
+const Skin* Geometry::DeformerSkin() const {
+    return skin;
+}
+
+// ------------------------------------------------------------------------------------------------
+MeshGeometry::MeshGeometry(uint64_t id, const Element& element, const std::string& name, const Document& doc)
+: Geometry(id, element,name, doc)
+{
+    const Scope* sc = element.Compound();
+    if (!sc) {
+        DOMError("failed to read Geometry object (class: Mesh), no data scope found");
+    }
+
+    // must have Mesh elements:
+    const Element& Vertices = GetRequiredElement(*sc,"Vertices",&element);
+    const Element& PolygonVertexIndex = GetRequiredElement(*sc,"PolygonVertexIndex",&element);
+
+    // optional Mesh elements:
+    const ElementCollection& Layer = sc->GetCollection("Layer");
+
+    std::vector<aiVector3D> tempVerts;
+    ParseVectorDataArray(tempVerts,Vertices);
+
+    if(tempVerts.empty()) {
+        FBXImporter::LogWarn("encountered mesh with no vertices");
+    }
+
+    std::vector<int> tempFaces;
+    ParseVectorDataArray(tempFaces,PolygonVertexIndex);
+
+    if(tempFaces.empty()) {
+        FBXImporter::LogWarn("encountered mesh with no faces");
+    }
+
+    m_vertices.reserve(tempFaces.size());
+    m_faces.reserve(tempFaces.size() / 3);
+
+    m_mapping_offsets.resize(tempVerts.size());
+    m_mapping_counts.resize(tempVerts.size(),0);
+    m_mappings.resize(tempFaces.size());
+
+    const size_t vertex_count = tempVerts.size();
+
+    // generate output vertices, computing an adjacency table to
+    // preserve the mapping from fbx indices to *this* indexing.
+    unsigned int count = 0;
+    for(int index : tempFaces) {
+        const int absi = index < 0 ? (-index - 1) : index;
+        if(static_cast<size_t>(absi) >= vertex_count) {
+            DOMError("polygon vertex index out of range",&PolygonVertexIndex);
+        }
+
+        m_vertices.push_back(tempVerts[absi]);
+        ++count;
+
+        ++m_mapping_counts[absi];
+
+        if (index < 0) {
+            m_faces.push_back(count);
+            count = 0;
+        }
+    }
+
+    unsigned int cursor = 0;
+    for (size_t i = 0, e = tempVerts.size(); i < e; ++i) {
+        m_mapping_offsets[i] = cursor;
+        cursor += m_mapping_counts[i];
+
+        m_mapping_counts[i] = 0;
+    }
+
+    cursor = 0;
+    for(int index : tempFaces) {
+        const int absi = index < 0 ? (-index - 1) : index;
+        m_mappings[m_mapping_offsets[absi] + m_mapping_counts[absi]++] = cursor++;
+    }
+
+    // if settings.readAllLayers is true:
+    //  * read all layers, try to load as many vertex channels as possible
+    // if settings.readAllLayers is false:
+    //  * read only the layer with index 0, but warn about any further layers
+    for (ElementMap::const_iterator it = Layer.first; it != Layer.second; ++it) {
+        const TokenList& tokens = (*it).second->Tokens();
+
+        const char* err;
+        const int index = ParseTokenAsInt(*tokens[0], err);
+        if(err) {
+            DOMError(err,&element);
+        }
+
+        if(doc.Settings().readAllLayers || index == 0) {
+            const Scope& layer = GetRequiredScope(*(*it).second);
+            ReadLayer(layer);
+        }
+        else {
+            FBXImporter::LogWarn("ignoring additional geometry layers");
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+MeshGeometry::~MeshGeometry() {
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+const std::vector<aiVector3D>& MeshGeometry::GetVertices() const {
+    return m_vertices;
+}
+
+// ------------------------------------------------------------------------------------------------
+const std::vector<aiVector3D>& MeshGeometry::GetNormals() const {
+    return m_normals;
+}
+
+// ------------------------------------------------------------------------------------------------
+const std::vector<aiVector3D>& MeshGeometry::GetTangents() const {
+    return m_tangents;
+}
+
+// ------------------------------------------------------------------------------------------------
+const std::vector<aiVector3D>& MeshGeometry::GetBinormals() const {
+    return m_binormals;
+}
+
+// ------------------------------------------------------------------------------------------------
+const std::vector<unsigned int>& MeshGeometry::GetFaceIndexCounts() const {
+    return m_faces;
+}
+
+// ------------------------------------------------------------------------------------------------
+const std::vector<aiVector2D>& MeshGeometry::GetTextureCoords( unsigned int index ) const {
+    static const std::vector<aiVector2D> empty;
+    return index >= AI_MAX_NUMBER_OF_TEXTURECOORDS ? empty : m_uvs[ index ];
+}
+
+std::string MeshGeometry::GetTextureCoordChannelName( unsigned int index ) const {
+    return index >= AI_MAX_NUMBER_OF_TEXTURECOORDS ? "" : m_uvNames[ index ];
+}
+
+const std::vector<aiColor4D>& MeshGeometry::GetVertexColors( unsigned int index ) const {
+    static const std::vector<aiColor4D> empty;
+    return index >= AI_MAX_NUMBER_OF_COLOR_SETS ? empty : m_colors[ index ];
+}
+
+const MatIndexArray& MeshGeometry::GetMaterialIndices() const {
+    return m_materials;
+}
+// ------------------------------------------------------------------------------------------------
+const unsigned int* MeshGeometry::ToOutputVertexIndex( unsigned int in_index, unsigned int& count ) const {
+    if ( in_index >= m_mapping_counts.size() ) {
+        return NULL;
+    }
+
+    ai_assert( m_mapping_counts.size() == m_mapping_offsets.size() );
+    count = m_mapping_counts[ in_index ];
+
+    ai_assert( m_mapping_offsets[ in_index ] + count <= m_mappings.size() );
+
+    return &m_mappings[ m_mapping_offsets[ in_index ] ];
+}
+
+// ------------------------------------------------------------------------------------------------
+unsigned int MeshGeometry::FaceForVertexIndex( unsigned int in_index ) const {
+    ai_assert( in_index < m_vertices.size() );
+
+    // in the current conversion pattern this will only be needed if
+    // weights are present, so no need to always pre-compute this table
+    if ( m_facesVertexStartIndices.empty() ) {
+        m_facesVertexStartIndices.resize( m_faces.size() + 1, 0 );
+
+        std::partial_sum( m_faces.begin(), m_faces.end(), m_facesVertexStartIndices.begin() + 1 );
+        m_facesVertexStartIndices.pop_back();
+    }
+
+    ai_assert( m_facesVertexStartIndices.size() == m_faces.size() );
+    const std::vector<unsigned int>::iterator it = std::upper_bound(
+        m_facesVertexStartIndices.begin(),
+        m_facesVertexStartIndices.end(),
+        in_index
+        );
+
+    return static_cast< unsigned int >( std::distance( m_facesVertexStartIndices.begin(), it - 1 ) );
+}
+
+// ------------------------------------------------------------------------------------------------
+void MeshGeometry::ReadLayer(const Scope& layer)
+{
+    const ElementCollection& LayerElement = layer.GetCollection("LayerElement");
+    for (ElementMap::const_iterator eit = LayerElement.first; eit != LayerElement.second; ++eit) {
+        const Scope& elayer = GetRequiredScope(*(*eit).second);
+
+        ReadLayerElement(elayer);
+    }
+}
+
+
+// ------------------------------------------------------------------------------------------------
+void MeshGeometry::ReadLayerElement(const Scope& layerElement)
+{
+    const Element& Type = GetRequiredElement(layerElement,"Type");
+    const Element& TypedIndex = GetRequiredElement(layerElement,"TypedIndex");
+
+    const std::string& type = ParseTokenAsString(GetRequiredToken(Type,0));
+    const int typedIndex = ParseTokenAsInt(GetRequiredToken(TypedIndex,0));
+
+    const Scope& top = GetRequiredScope(element);
+    const ElementCollection candidates = top.GetCollection(type);
+
+    for (ElementMap::const_iterator it = candidates.first; it != candidates.second; ++it) {
+        const int index = ParseTokenAsInt(GetRequiredToken(*(*it).second,0));
+        if(index == typedIndex) {
+            ReadVertexData(type,typedIndex,GetRequiredScope(*(*it).second));
+            return;
+        }
+    }
+
+    FBXImporter::LogError(Formatter::format("failed to resolve vertex layer element: ")
+        << type << ", index: " << typedIndex);
+}
+
+// ------------------------------------------------------------------------------------------------
+void MeshGeometry::ReadVertexData(const std::string& type, int index, const Scope& source)
+{
+    const std::string& MappingInformationType = ParseTokenAsString(GetRequiredToken(
+        GetRequiredElement(source,"MappingInformationType"),0)
+    );
+
+    const std::string& ReferenceInformationType = ParseTokenAsString(GetRequiredToken(
+        GetRequiredElement(source,"ReferenceInformationType"),0)
+    );
+
+    if (type == "LayerElementUV") {
+        if(index >= AI_MAX_NUMBER_OF_TEXTURECOORDS) {
+            FBXImporter::LogError(Formatter::format("ignoring UV layer, maximum number of UV channels exceeded: ")
+                << index << " (limit is " << AI_MAX_NUMBER_OF_TEXTURECOORDS << ")" );
+            return;
+        }
+
+        const Element* Name = source["Name"];
+        m_uvNames[index] = "";
+        if(Name) {
+            m_uvNames[index] = ParseTokenAsString(GetRequiredToken(*Name,0));
+        }
+
+        ReadVertexDataUV(m_uvs[index],source,
+            MappingInformationType,
+            ReferenceInformationType
+        );
+    }
+    else if (type == "LayerElementMaterial") {
+        if (m_materials.size() > 0) {
+            FBXImporter::LogError("ignoring additional material layer");
+            return;
+        }
+
+        std::vector<int> temp_materials;
+
+        ReadVertexDataMaterials(temp_materials,source,
+            MappingInformationType,
+            ReferenceInformationType
+        );
+
+        // sometimes, there will be only negative entries. Drop the material
+        // layer in such a case (I guess it means a default material should
+        // be used). This is what the converter would do anyway, and it
+        // avoids losing the material if there are more material layers
+        // coming of which at least one contains actual data (did observe
+        // that with one test file).
+        const size_t count_neg = std::count_if(temp_materials.begin(),temp_materials.end(),[](int n) { return n < 0; });
+        if(count_neg == temp_materials.size()) {
+            FBXImporter::LogWarn("ignoring dummy material layer (all entries -1)");
+            return;
+        }
+
+        std::swap(temp_materials, m_materials);
+    }
+    else if (type == "LayerElementNormal") {
+        if (m_normals.size() > 0) {
+            FBXImporter::LogError("ignoring additional normal layer");
+            return;
+        }
+
+        ReadVertexDataNormals(m_normals,source,
+            MappingInformationType,
+            ReferenceInformationType
+        );
+    }
+    else if (type == "LayerElementTangent") {
+        if (m_tangents.size() > 0) {
+            FBXImporter::LogError("ignoring additional tangent layer");
+            return;
+        }
+
+        ReadVertexDataTangents(m_tangents,source,
+            MappingInformationType,
+            ReferenceInformationType
+        );
+    }
+    else if (type == "LayerElementBinormal") {
+        if (m_binormals.size() > 0) {
+            FBXImporter::LogError("ignoring additional binormal layer");
+            return;
+        }
+
+        ReadVertexDataBinormals(m_binormals,source,
+            MappingInformationType,
+            ReferenceInformationType
+        );
+    }
+    else if (type == "LayerElementColor") {
+        if(index >= AI_MAX_NUMBER_OF_COLOR_SETS) {
+            FBXImporter::LogError(Formatter::format("ignoring vertex color layer, maximum number of color sets exceeded: ")
+                << index << " (limit is " << AI_MAX_NUMBER_OF_COLOR_SETS << ")" );
+            return;
+        }
+
+        ReadVertexDataColors(m_colors[index],source,
+            MappingInformationType,
+            ReferenceInformationType
+        );
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+// Lengthy utility function to read and resolve a FBX vertex data array - that is, the
+// output is in polygon vertex order. This logic is used for reading normals, UVs, colors,
+// tangents ..
+template <typename T>
+void ResolveVertexDataArray(std::vector<T>& data_out, const Scope& source,
+    const std::string& MappingInformationType,
+    const std::string& ReferenceInformationType,
+    const char* dataElementName,
+    const char* indexDataElementName,
+    size_t vertex_count,
+    const std::vector<unsigned int>& mapping_counts,
+    const std::vector<unsigned int>& mapping_offsets,
+    const std::vector<unsigned int>& mappings)
+{
+    bool isDirect = ReferenceInformationType == "Direct";
+    bool isIndexToDirect = ReferenceInformationType == "IndexToDirect";
+
+    // fall-back to direct data if there is no index data element
+    if ( isIndexToDirect && !HasElement( source, indexDataElementName ) ) {
+        isDirect = true;
+        isIndexToDirect = false;
+    }
+
+    // handle permutations of Mapping and Reference type - it would be nice to
+    // deal with this more elegantly and with less redundancy, but right
+    // now it seems unavoidable.
+    if (MappingInformationType == "ByVertice" && isDirect) {
+        if (!HasElement(source, dataElementName)) {
+            return;
+        }
+        std::vector<T> tempData;
+		ParseVectorDataArray(tempData, GetRequiredElement(source, dataElementName));
+
+        data_out.resize(vertex_count);
+		for (size_t i = 0, e = tempData.size(); i < e; ++i) {
+
+            const unsigned int istart = mapping_offsets[i], iend = istart + mapping_counts[i];
+            for (unsigned int j = istart; j < iend; ++j) {
+				data_out[mappings[j]] = tempData[i];
+            }
+        }
+    }
+    else if (MappingInformationType == "ByVertice" && isIndexToDirect) {
+		std::vector<T> tempData;
+		ParseVectorDataArray(tempData, GetRequiredElement(source, dataElementName));
+
+        data_out.resize(vertex_count);
+
+        std::vector<int> uvIndices;
+        ParseVectorDataArray(uvIndices,GetRequiredElement(source,indexDataElementName));
+        for (size_t i = 0, e = uvIndices.size(); i < e; ++i) {
+
+            const unsigned int istart = mapping_offsets[i], iend = istart + mapping_counts[i];
+            for (unsigned int j = istart; j < iend; ++j) {
+				if (static_cast<size_t>(uvIndices[i]) >= tempData.size()) {
+                    DOMError("index out of range",&GetRequiredElement(source,indexDataElementName));
+                }
+				data_out[mappings[j]] = tempData[uvIndices[i]];
+            }
+        }
+    }
+    else if (MappingInformationType == "ByPolygonVertex" && isDirect) {
+		std::vector<T> tempData;
+		ParseVectorDataArray(tempData, GetRequiredElement(source, dataElementName));
+
+		if (tempData.size() != vertex_count) {
+            FBXImporter::LogError(Formatter::format("length of input data unexpected for ByPolygon mapping: ")
+				<< tempData.size() << ", expected " << vertex_count
+            );
+            return;
+        }
+
+		data_out.swap(tempData);
+    }
+    else if (MappingInformationType == "ByPolygonVertex" && isIndexToDirect) {
+		std::vector<T> tempData;
+		ParseVectorDataArray(tempData, GetRequiredElement(source, dataElementName));
+
+        data_out.resize(vertex_count);
+
+        std::vector<int> uvIndices;
+        ParseVectorDataArray(uvIndices,GetRequiredElement(source,indexDataElementName));
+
+        if (uvIndices.size() != vertex_count) {
+            FBXImporter::LogError("length of input data unexpected for ByPolygonVertex mapping");
+            return;
+        }
+
+        const T empty;
+        unsigned int next = 0;
+        for(int i : uvIndices) {
+            if ( -1 == i ) {
+                data_out[ next++ ] = empty;
+                continue;
+            }
+            if (static_cast<size_t>(i) >= tempData.size()) {
+                DOMError("index out of range",&GetRequiredElement(source,indexDataElementName));
+            }
+
+			data_out[next++] = tempData[i];
+        }
+    }
+    else {
+        FBXImporter::LogError(Formatter::format("ignoring vertex data channel, access type not implemented: ")
+            << MappingInformationType << "," << ReferenceInformationType);
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+void MeshGeometry::ReadVertexDataNormals(std::vector<aiVector3D>& normals_out, const Scope& source,
+    const std::string& MappingInformationType,
+    const std::string& ReferenceInformationType)
+{
+    ResolveVertexDataArray(normals_out,source,MappingInformationType,ReferenceInformationType,
+        "Normals",
+        "NormalsIndex",
+        m_vertices.size(),
+        m_mapping_counts,
+        m_mapping_offsets,
+        m_mappings);
+}
+
+// ------------------------------------------------------------------------------------------------
+void MeshGeometry::ReadVertexDataUV(std::vector<aiVector2D>& uv_out, const Scope& source,
+    const std::string& MappingInformationType,
+    const std::string& ReferenceInformationType)
+{
+    ResolveVertexDataArray(uv_out,source,MappingInformationType,ReferenceInformationType,
+        "UV",
+        "UVIndex",
+        m_vertices.size(),
+        m_mapping_counts,
+        m_mapping_offsets,
+        m_mappings);
+}
+
+// ------------------------------------------------------------------------------------------------
+void MeshGeometry::ReadVertexDataColors(std::vector<aiColor4D>& colors_out, const Scope& source,
+    const std::string& MappingInformationType,
+    const std::string& ReferenceInformationType)
+{
+    ResolveVertexDataArray(colors_out,source,MappingInformationType,ReferenceInformationType,
+        "Colors",
+        "ColorIndex",
+        m_vertices.size(),
+        m_mapping_counts,
+        m_mapping_offsets,
+        m_mappings);
+}
+
+// ------------------------------------------------------------------------------------------------
+static const char *TangentIndexToken = "TangentIndex";
+static const char *TangentsIndexToken = "TangentsIndex";
+
+void MeshGeometry::ReadVertexDataTangents(std::vector<aiVector3D>& tangents_out, const Scope& source,
+    const std::string& MappingInformationType,
+    const std::string& ReferenceInformationType)
+{
+    const char * str = source.Elements().count( "Tangents" ) > 0 ? "Tangents" : "Tangent";
+    const char * strIdx = source.Elements().count( "Tangents" ) > 0 ? TangentsIndexToken : TangentIndexToken;
+    ResolveVertexDataArray(tangents_out,source,MappingInformationType,ReferenceInformationType,
+        str,
+        strIdx,
+        m_vertices.size(),
+        m_mapping_counts,
+        m_mapping_offsets,
+        m_mappings);
+}
+
+// ------------------------------------------------------------------------------------------------
+static const std::string BinormalIndexToken = "BinormalIndex";
+static const std::string BinormalsIndexToken = "BinormalsIndex";
+
+void MeshGeometry::ReadVertexDataBinormals(std::vector<aiVector3D>& binormals_out, const Scope& source,
+    const std::string& MappingInformationType,
+    const std::string& ReferenceInformationType)
+{
+    const char * str = source.Elements().count( "Binormals" ) > 0 ? "Binormals" : "Binormal";
+    const char * strIdx = source.Elements().count( "Binormals" ) > 0 ? BinormalsIndexToken.c_str() : BinormalIndexToken.c_str();
+    ResolveVertexDataArray(binormals_out,source,MappingInformationType,ReferenceInformationType,
+        str,
+        strIdx,
+        m_vertices.size(),
+        m_mapping_counts,
+        m_mapping_offsets,
+        m_mappings);
+}
+
+
+// ------------------------------------------------------------------------------------------------
+void MeshGeometry::ReadVertexDataMaterials(std::vector<int>& materials_out, const Scope& source,
+    const std::string& MappingInformationType,
+    const std::string& ReferenceInformationType)
+{
+    const size_t face_count = m_faces.size();
+    if( 0 == face_count )
+    {
+        return;
+    }
+    
+    // materials are handled separately. First of all, they are assigned per-face
+    // and not per polyvert. Secondly, ReferenceInformationType=IndexToDirect
+    // has a slightly different meaning for materials.
+    ParseVectorDataArray(materials_out,GetRequiredElement(source,"Materials"));
+
+    if (MappingInformationType == "AllSame") {
+        // easy - same material for all faces
+        if (materials_out.empty()) {
+            FBXImporter::LogError(Formatter::format("expected material index, ignoring"));
+            return;
+        } else if (materials_out.size() > 1) {
+            FBXImporter::LogWarn(Formatter::format("expected only a single material index, ignoring all except the first one"));
+            materials_out.clear();
+        }
+
+        materials_out.resize(m_vertices.size());
+        std::fill(materials_out.begin(), materials_out.end(), materials_out.at(0));
+    } else if (MappingInformationType == "ByPolygon" && ReferenceInformationType == "IndexToDirect") {
+        materials_out.resize(face_count);
+
+        if(materials_out.size() != face_count) {
+            FBXImporter::LogError(Formatter::format("length of input data unexpected for ByPolygon mapping: ")
+                << materials_out.size() << ", expected " << face_count
+            );
+            return;
+        }
+    } else {
+        FBXImporter::LogError(Formatter::format("ignoring material assignments, access type not implemented: ")
+            << MappingInformationType << "," << ReferenceInformationType);
+    }
+}
+// ------------------------------------------------------------------------------------------------
+ShapeGeometry::ShapeGeometry(uint64_t id, const Element& element, const std::string& name, const Document& doc)
+: Geometry(id, element, name, doc) {
+    const Scope *sc = element.Compound();
+    if (nullptr == sc) {
+        DOMError("failed to read Geometry object (class: Shape), no data scope found");
+    }
+    const Element& Indexes = GetRequiredElement(*sc, "Indexes", &element);
+    const Element& Normals = GetRequiredElement(*sc, "Normals", &element);
+    const Element& Vertices = GetRequiredElement(*sc, "Vertices", &element);
+    ParseVectorDataArray(m_indices, Indexes);
+    ParseVectorDataArray(m_vertices, Vertices);
+    ParseVectorDataArray(m_normals, Normals);
+}
+
+// ------------------------------------------------------------------------------------------------
+ShapeGeometry::~ShapeGeometry() {
+    // empty
+}
+// ------------------------------------------------------------------------------------------------
+const std::vector<aiVector3D>& ShapeGeometry::GetVertices() const {
+    return m_vertices;
+}
+// ------------------------------------------------------------------------------------------------
+const std::vector<aiVector3D>& ShapeGeometry::GetNormals() const {
+    return m_normals;
+}
+// ------------------------------------------------------------------------------------------------
+const std::vector<unsigned int>& ShapeGeometry::GetIndices() const {
+    return m_indices;
+}
+// ------------------------------------------------------------------------------------------------
+LineGeometry::LineGeometry(uint64_t id, const Element& element, const std::string& name, const Document& doc)
+    : Geometry(id, element, name, doc)
+{
+    const Scope* sc = element.Compound();
+    if (!sc) {
+        DOMError("failed to read Geometry object (class: Line), no data scope found");
+    }
+    const Element& Points = GetRequiredElement(*sc, "Points", &element);
+    const Element& PointsIndex = GetRequiredElement(*sc, "PointsIndex", &element);
+    ParseVectorDataArray(m_vertices, Points);
+    ParseVectorDataArray(m_indices, PointsIndex);
+}
+
+// ------------------------------------------------------------------------------------------------
+LineGeometry::~LineGeometry() {
+    // empty
+}
+// ------------------------------------------------------------------------------------------------
+const std::vector<aiVector3D>& LineGeometry::GetVertices() const {
+    return m_vertices;
+}
+// ------------------------------------------------------------------------------------------------
+const std::vector<int>& LineGeometry::GetIndices() const {
+    return m_indices;
+}
+} // !FBX
+} // !Assimp
+#endif
+

thirdparty/assimp/code/FBX/FBXMeshGeometry.h

@@ -0,0 +1,235 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXImporter.h
+*  @brief Declaration of the FBX main importer class
+*/
+#ifndef INCLUDED_AI_FBX_MESHGEOMETRY_H
+#define INCLUDED_AI_FBX_MESHGEOMETRY_H
+
+#include "FBXParser.h"
+#include "FBXDocument.h"
+
+namespace Assimp {
+namespace FBX {
+
+/** 
+ *  DOM base class for all kinds of FBX geometry 
+ */
+class Geometry : public Object
+{
+public:
+    Geometry( uint64_t id, const Element& element, const std::string& name, const Document& doc );
+    virtual ~Geometry();
+
+    /** Get the Skin attached to this geometry or NULL */
+    const Skin* DeformerSkin() const;
+
+    /** Get the BlendShape attached to this geometry or NULL */
+    const std::vector<const BlendShape*>& GetBlendShapes() const;
+
+private:
+    const Skin* skin;
+    std::vector<const BlendShape*> blendShapes;
+
+};
+
+typedef std::vector<int> MatIndexArray;
+
+
+/** 
+ *  DOM class for FBX geometry of type "Mesh"
+ */
+class MeshGeometry : public Geometry
+{
+public:
+    /** The class constructor */
+    MeshGeometry( uint64_t id, const Element& element, const std::string& name, const Document& doc );
+    
+    /** The class destructor */
+    virtual ~MeshGeometry();
+
+    /** Get a list of all vertex points, non-unique*/
+    const std::vector<aiVector3D>& GetVertices() const;
+
+    /** Get a list of all vertex normals or an empty array if
+    *  no normals are specified. */
+    const std::vector<aiVector3D>& GetNormals() const;
+
+    /** Get a list of all vertex tangents or an empty array
+    *  if no tangents are specified */
+    const std::vector<aiVector3D>& GetTangents() const;
+
+    /** Get a list of all vertex bi-normals or an empty array
+    *  if no bi-normals are specified */
+    const std::vector<aiVector3D>& GetBinormals() const;
+
+    /** Return list of faces - each entry denotes a face and specifies
+    *  how many vertices it has. Vertices are taken from the
+    *  vertex data arrays in sequential order. */
+    const std::vector<unsigned int>& GetFaceIndexCounts() const;
+
+    /** Get a UV coordinate slot, returns an empty array if
+    *  the requested slot does not exist. */
+    const std::vector<aiVector2D>& GetTextureCoords( unsigned int index ) const;
+
+    /** Get a UV coordinate slot, returns an empty array if
+    *  the requested slot does not exist. */
+    std::string GetTextureCoordChannelName( unsigned int index ) const;
+
+    /** Get a vertex color coordinate slot, returns an empty array if
+    *  the requested slot does not exist. */
+    const std::vector<aiColor4D>& GetVertexColors( unsigned int index ) const;
+
+    /** Get per-face-vertex material assignments */
+    const MatIndexArray& GetMaterialIndices() const;
+
+    /** Convert from a fbx file vertex index (for example from a #Cluster weight) or NULL
+    * if the vertex index is not valid. */
+    const unsigned int* ToOutputVertexIndex( unsigned int in_index, unsigned int& count ) const;
+
+    /** Determine the face to which a particular output vertex index belongs.
+    *  This mapping is always unique. */
+    unsigned int FaceForVertexIndex( unsigned int in_index ) const;
+private:
+    void ReadLayer( const Scope& layer );
+    void ReadLayerElement( const Scope& layerElement );
+    void ReadVertexData( const std::string& type, int index, const Scope& source );
+
+    void ReadVertexDataUV( std::vector<aiVector2D>& uv_out, const Scope& source,
+        const std::string& MappingInformationType,
+        const std::string& ReferenceInformationType );
+
+    void ReadVertexDataNormals( std::vector<aiVector3D>& normals_out, const Scope& source,
+        const std::string& MappingInformationType,
+        const std::string& ReferenceInformationType );
+
+    void ReadVertexDataColors( std::vector<aiColor4D>& colors_out, const Scope& source,
+        const std::string& MappingInformationType,
+        const std::string& ReferenceInformationType );
+
+    void ReadVertexDataTangents( std::vector<aiVector3D>& tangents_out, const Scope& source,
+        const std::string& MappingInformationType,
+        const std::string& ReferenceInformationType );
+
+    void ReadVertexDataBinormals( std::vector<aiVector3D>& binormals_out, const Scope& source,
+        const std::string& MappingInformationType,
+        const std::string& ReferenceInformationType );
+
+    void ReadVertexDataMaterials( MatIndexArray& materials_out, const Scope& source,
+        const std::string& MappingInformationType,
+        const std::string& ReferenceInformationType );
+
+private:
+    // cached data arrays
+    MatIndexArray m_materials;
+    std::vector<aiVector3D> m_vertices;
+    std::vector<unsigned int> m_faces;
+    mutable std::vector<unsigned int> m_facesVertexStartIndices;
+    std::vector<aiVector3D> m_tangents;
+    std::vector<aiVector3D> m_binormals;
+    std::vector<aiVector3D> m_normals;
+
+    std::string m_uvNames[ AI_MAX_NUMBER_OF_TEXTURECOORDS ];
+    std::vector<aiVector2D> m_uvs[ AI_MAX_NUMBER_OF_TEXTURECOORDS ];
+    std::vector<aiColor4D> m_colors[ AI_MAX_NUMBER_OF_COLOR_SETS ];
+
+    std::vector<unsigned int> m_mapping_counts;
+    std::vector<unsigned int> m_mapping_offsets;
+    std::vector<unsigned int> m_mappings;
+};
+
+/**
+*  DOM class for FBX geometry of type "Shape"
+*/
+class ShapeGeometry : public Geometry
+{
+public:
+    /** The class constructor */
+    ShapeGeometry(uint64_t id, const Element& element, const std::string& name, const Document& doc);
+
+    /** The class destructor */
+    virtual ~ShapeGeometry();
+
+    /** Get a list of all vertex points, non-unique*/
+    const std::vector<aiVector3D>& GetVertices() const;
+
+    /** Get a list of all vertex normals or an empty array if
+    *  no normals are specified. */
+    const std::vector<aiVector3D>& GetNormals() const;
+
+    /** Return list of vertex indices. */
+    const std::vector<unsigned int>& GetIndices() const;
+
+private:
+    std::vector<aiVector3D> m_vertices;
+    std::vector<aiVector3D> m_normals;
+    std::vector<unsigned int> m_indices;
+};
+/**
+*  DOM class for FBX geometry of type "Line"
+*/
+class LineGeometry : public Geometry
+{
+public:
+    /** The class constructor */
+    LineGeometry(uint64_t id, const Element& element, const std::string& name, const Document& doc);
+
+    /** The class destructor */
+    virtual ~LineGeometry();
+
+    /** Get a list of all vertex points, non-unique*/
+    const std::vector<aiVector3D>& GetVertices() const;
+
+    /** Return list of vertex indices. */
+    const std::vector<int>& GetIndices() const;
+
+private:
+    std::vector<aiVector3D> m_vertices;
+    std::vector<int> m_indices;
+};
+
+}
+}
+
+#endif // INCLUDED_AI_FBX_MESHGEOMETRY_H
+

thirdparty/assimp/code/FBX/FBXModel.cpp

@@ -0,0 +1,153 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXModel.cpp
+ *  @brief Assimp::FBX::Model implementation
+ */
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+#include "FBXParser.h"
+#include "FBXMeshGeometry.h"
+#include "FBXDocument.h"
+#include "FBXImporter.h"
+#include "FBXDocumentUtil.h"
+
+namespace Assimp {
+namespace FBX {
+
+using namespace Util;
+
+// ------------------------------------------------------------------------------------------------
+Model::Model(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+    : Object(id,element,name)
+    , shading("Y")
+{
+    const Scope& sc = GetRequiredScope(element);
+    const Element* const Shading = sc["Shading"];
+    const Element* const Culling = sc["Culling"];
+
+    if(Shading) {
+        shading = GetRequiredToken(*Shading,0).StringContents();
+    }
+
+    if (Culling) {
+        culling = ParseTokenAsString(GetRequiredToken(*Culling,0));
+    }
+
+    props = GetPropertyTable(doc,"Model.FbxNode",element,sc);
+    ResolveLinks(element,doc);
+}
+
+// ------------------------------------------------------------------------------------------------
+Model::~Model()
+{
+
+}
+
+// ------------------------------------------------------------------------------------------------
+void Model::ResolveLinks(const Element& element, const Document& doc)
+{
+    const char* const arr[] = {"Geometry","Material","NodeAttribute"};
+
+    // resolve material
+    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(),arr, 3);
+
+    materials.reserve(conns.size());
+    geometry.reserve(conns.size());
+    attributes.reserve(conns.size());
+    for(const Connection* con : conns) {
+
+        // material and geometry links should be Object-Object connections
+        if (con->PropertyName().length()) {
+            continue;
+        }
+
+        const Object* const ob = con->SourceObject();
+        if(!ob) {
+            DOMWarning("failed to read source object for incoming Model link, ignoring",&element);
+            continue;
+        }
+
+        const Material* const mat = dynamic_cast<const Material*>(ob);
+        if(mat) {
+            materials.push_back(mat);
+            continue;
+        }
+
+        const Geometry* const geo = dynamic_cast<const Geometry*>(ob);
+        if(geo) {
+            geometry.push_back(geo);
+            continue;
+        }
+
+        const NodeAttribute* const att = dynamic_cast<const NodeAttribute*>(ob);
+        if(att) {
+            attributes.push_back(att);
+            continue;
+        }
+
+        DOMWarning("source object for model link is neither Material, NodeAttribute nor Geometry, ignoring",&element);
+        continue;
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+bool Model::IsNull() const
+{
+    const std::vector<const NodeAttribute*>& attrs = GetAttributes();
+    for(const NodeAttribute* att : attrs) {
+
+        const Null* null_tag = dynamic_cast<const Null*>(att);
+        if(null_tag) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+
+} //!FBX
+} //!Assimp
+
+#endif

thirdparty/assimp/code/FBX/FBXNodeAttribute.cpp

@@ -0,0 +1,170 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXNoteAttribute.cpp
+ *  @brief Assimp::FBX::NodeAttribute (and subclasses) implementation
+ */
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+#include "FBXParser.h"
+#include "FBXDocument.h"
+#include "FBXImporter.h"
+#include "FBXDocumentUtil.h"
+
+namespace Assimp {
+namespace FBX {
+
+using namespace Util;
+
+// ------------------------------------------------------------------------------------------------
+NodeAttribute::NodeAttribute(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+: Object(id,element,name)
+, props()
+{
+    const Scope& sc = GetRequiredScope(element);
+
+    const std::string& classname = ParseTokenAsString(GetRequiredToken(element,2));
+
+    // hack on the deriving type but Null/LimbNode attributes are the only case in which
+    // the property table is by design absent and no warning should be generated
+    // for it.
+    const bool is_null_or_limb = !strcmp(classname.c_str(), "Null") || !strcmp(classname.c_str(), "LimbNode");
+    props = GetPropertyTable(doc,"NodeAttribute.Fbx" + classname,element,sc, is_null_or_limb);
+}
+
+
+// ------------------------------------------------------------------------------------------------
+NodeAttribute::~NodeAttribute()
+{
+    // empty
+}
+
+
+// ------------------------------------------------------------------------------------------------
+CameraSwitcher::CameraSwitcher(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+    : NodeAttribute(id,element,doc,name)
+{
+    const Scope& sc = GetRequiredScope(element);
+    const Element* const CameraId = sc["CameraId"];
+    const Element* const CameraName = sc["CameraName"];
+    const Element* const CameraIndexName = sc["CameraIndexName"];
+
+    if(CameraId) {
+        cameraId = ParseTokenAsInt(GetRequiredToken(*CameraId,0));
+    }
+
+    if(CameraName) {
+        cameraName = GetRequiredToken(*CameraName,0).StringContents();
+    }
+
+    if(CameraIndexName && CameraIndexName->Tokens().size()) {
+        cameraIndexName = GetRequiredToken(*CameraIndexName,0).StringContents();
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+CameraSwitcher::~CameraSwitcher()
+{
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+Camera::Camera(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+: NodeAttribute(id,element,doc,name)
+{
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+Camera::~Camera()
+{
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+Light::Light(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+: NodeAttribute(id,element,doc,name)
+{
+    // empty
+}
+
+
+// ------------------------------------------------------------------------------------------------
+Light::~Light()
+{
+}
+
+
+// ------------------------------------------------------------------------------------------------
+Null::Null(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+: NodeAttribute(id,element,doc,name)
+{
+
+}
+
+
+// ------------------------------------------------------------------------------------------------
+Null::~Null()
+{
+
+}
+
+
+// ------------------------------------------------------------------------------------------------
+LimbNode::LimbNode(uint64_t id, const Element& element, const Document& doc, const std::string& name)
+: NodeAttribute(id,element,doc,name)
+{
+
+}
+
+
+// ------------------------------------------------------------------------------------------------
+LimbNode::~LimbNode()
+{
+
+}
+
+}
+}
+
+#endif

thirdparty/assimp/code/FBX/FBXParser.h

@@ -0,0 +1,235 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXParser.h
+ *  @brief FBX parsing code
+ */
+#ifndef INCLUDED_AI_FBX_PARSER_H
+#define INCLUDED_AI_FBX_PARSER_H
+
+#include <stdint.h>
+#include <map>
+#include <memory>
+#include <assimp/LogAux.h>
+#include <assimp/fast_atof.h>
+
+#include "FBXCompileConfig.h"
+#include "FBXTokenizer.h"
+
+namespace Assimp {
+namespace FBX {
+
+class Scope;
+class Parser;
+class Element;
+
+// XXX should use C++11's unique_ptr - but assimp's need to keep working with 03
+typedef std::vector< Scope* > ScopeList;
+typedef std::fbx_unordered_multimap< std::string, Element* > ElementMap;
+
+typedef std::pair<ElementMap::const_iterator,ElementMap::const_iterator> ElementCollection;
+
+#   define new_Scope new Scope
+#   define new_Element new Element
+
+
+/** FBX data entity that consists of a key:value tuple.
+ *
+ *  Example:
+ *  @verbatim
+ *    AnimationCurve: 23, "AnimCurve::", "" {
+ *        [..]
+ *    }
+ *  @endverbatim
+ *
+ *  As can be seen in this sample, elements can contain nested #Scope
+ *  as their trailing member.  **/
+class Element
+{
+public:
+    Element(const Token& key_token, Parser& parser);
+    ~Element();
+
+    const Scope* Compound() const {
+        return compound.get();
+    }
+
+    const Token& KeyToken() const {
+        return key_token;
+    }
+
+    const TokenList& Tokens() const {
+        return tokens;
+    }
+
+private:
+    const Token& key_token;
+    TokenList tokens;
+    std::unique_ptr<Scope> compound;
+};
+
+/** FBX data entity that consists of a 'scope', a collection
+ *  of not necessarily unique #Element instances.
+ *
+ *  Example:
+ *  @verbatim
+ *    GlobalSettings:  {
+ *        Version: 1000
+ *        Properties70:
+ *        [...]
+ *    }
+ *  @endverbatim  */
+class Scope
+{
+public:
+    Scope(Parser& parser, bool topLevel = false);
+    ~Scope();
+
+    const Element* operator[] (const std::string& index) const {
+        ElementMap::const_iterator it = elements.find(index);
+        return it == elements.end() ? NULL : (*it).second;
+    }
+
+	const Element* FindElementCaseInsensitive(const std::string& elementName) const {
+		const char* elementNameCStr = elementName.c_str();
+		for (auto element = elements.begin(); element != elements.end(); ++element)
+		{
+			if (!ASSIMP_strincmp(element->first.c_str(), elementNameCStr, MAXLEN)) {
+				return element->second;
+			}
+		}
+		return NULL;
+	}
+
+    ElementCollection GetCollection(const std::string& index) const {
+        return elements.equal_range(index);
+    }
+
+    const ElementMap& Elements() const  {
+        return elements;
+    }
+
+private:
+    ElementMap elements;
+};
+
+/** FBX parsing class, takes a list of input tokens and generates a hierarchy
+ *  of nested #Scope instances, representing the fbx DOM.*/
+class Parser
+{
+public:
+    /** Parse given a token list. Does not take ownership of the tokens -
+     *  the objects must persist during the entire parser lifetime */
+    Parser (const TokenList& tokens,bool is_binary);
+    ~Parser();
+
+    const Scope& GetRootScope() const {
+        return *root.get();
+    }
+
+    bool IsBinary() const {
+        return is_binary;
+    }
+
+private:
+    friend class Scope;
+    friend class Element;
+
+    TokenPtr AdvanceToNextToken();
+    TokenPtr LastToken() const;
+    TokenPtr CurrentToken() const;
+
+private:
+    const TokenList& tokens;
+
+    TokenPtr last, current;
+    TokenList::const_iterator cursor;
+    std::unique_ptr<Scope> root;
+
+    const bool is_binary;
+};
+
+
+/* token parsing - this happens when building the DOM out of the parse-tree*/
+uint64_t ParseTokenAsID(const Token& t, const char*& err_out);
+size_t ParseTokenAsDim(const Token& t, const char*& err_out);
+
+float ParseTokenAsFloat(const Token& t, const char*& err_out);
+int ParseTokenAsInt(const Token& t, const char*& err_out);
+int64_t ParseTokenAsInt64(const Token& t, const char*& err_out);
+std::string ParseTokenAsString(const Token& t, const char*& err_out);
+
+/* wrapper around ParseTokenAsXXX() with DOMError handling */
+uint64_t ParseTokenAsID(const Token& t);
+size_t ParseTokenAsDim(const Token& t);
+float ParseTokenAsFloat(const Token& t);
+int ParseTokenAsInt(const Token& t);
+int64_t ParseTokenAsInt64(const Token& t);
+std::string ParseTokenAsString(const Token& t);
+
+/* read data arrays */
+void ParseVectorDataArray(std::vector<aiVector3D>& out, const Element& el);
+void ParseVectorDataArray(std::vector<aiColor4D>& out, const Element& el);
+void ParseVectorDataArray(std::vector<aiVector2D>& out, const Element& el);
+void ParseVectorDataArray(std::vector<int>& out, const Element& el);
+void ParseVectorDataArray(std::vector<float>& out, const Element& el);
+void ParseVectorDataArray(std::vector<unsigned int>& out, const Element& el);
+void ParseVectorDataArray(std::vector<uint64_t>& out, const Element& e);
+void ParseVectorDataArray(std::vector<int64_t>& out, const Element& el);
+
+bool HasElement( const Scope& sc, const std::string& index );
+
+// extract a required element from a scope, abort if the element cannot be found
+const Element& GetRequiredElement(const Scope& sc, const std::string& index, const Element* element = NULL);
+
+// extract required compound scope
+const Scope& GetRequiredScope(const Element& el);
+// get token at a particular index
+const Token& GetRequiredToken(const Element& el, unsigned int index);
+
+// read a 4x4 matrix from an array of 16 floats
+aiMatrix4x4 ReadMatrix(const Element& element);
+
+} // ! FBX
+} // ! Assimp
+
+#endif // ! INCLUDED_AI_FBX_PARSER_H

thirdparty/assimp/code/FBX/FBXProperties.cpp

@@ -0,0 +1,235 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXProperties.cpp
+ *  @brief Implementation of the FBX dynamic properties system
+ */
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+#include "FBXTokenizer.h"
+#include "FBXParser.h"
+#include "FBXDocument.h"
+#include "FBXDocumentUtil.h"
+#include "FBXProperties.h"
+
+namespace Assimp {
+namespace FBX {
+
+    using namespace Util;
+
+// ------------------------------------------------------------------------------------------------
+Property::Property()
+{
+}
+
+// ------------------------------------------------------------------------------------------------
+Property::~Property()
+{
+}
+
+namespace {
+
+// ------------------------------------------------------------------------------------------------
+// read a typed property out of a FBX element. The return value is NULL if the property cannot be read.
+Property* ReadTypedProperty(const Element& element)
+{
+    ai_assert(element.KeyToken().StringContents() == "P");
+
+    const TokenList& tok = element.Tokens();
+    ai_assert(tok.size() >= 5);
+
+    const std::string& s = ParseTokenAsString(*tok[1]);
+    const char* const cs = s.c_str();
+    if (!strcmp(cs,"KString")) {
+        return new TypedProperty<std::string>(ParseTokenAsString(*tok[4]));
+    }
+    else if (!strcmp(cs,"bool") || !strcmp(cs,"Bool")) {
+        return new TypedProperty<bool>(ParseTokenAsInt(*tok[4]) != 0);
+    }
+    else if (!strcmp(cs, "int") || !strcmp(cs, "Int") || !strcmp(cs, "enum") || !strcmp(cs, "Enum")) {
+        return new TypedProperty<int>(ParseTokenAsInt(*tok[4]));
+    }
+    else if (!strcmp(cs, "ULongLong")) {
+        return new TypedProperty<uint64_t>(ParseTokenAsID(*tok[4]));
+    }
+    else if (!strcmp(cs, "KTime")) {
+        return new TypedProperty<int64_t>(ParseTokenAsInt64(*tok[4]));
+    }
+    else if (!strcmp(cs,"Vector3D") ||
+        !strcmp(cs,"ColorRGB") ||
+        !strcmp(cs,"Vector") ||
+        !strcmp(cs,"Color") ||
+        !strcmp(cs,"Lcl Translation") ||
+        !strcmp(cs,"Lcl Rotation") ||
+        !strcmp(cs,"Lcl Scaling")
+        ) {
+        return new TypedProperty<aiVector3D>(aiVector3D(
+            ParseTokenAsFloat(*tok[4]),
+            ParseTokenAsFloat(*tok[5]),
+            ParseTokenAsFloat(*tok[6]))
+        );
+    }
+    else if (!strcmp(cs,"double") || !strcmp(cs,"Number") || !strcmp(cs,"Float") || !strcmp(cs,"FieldOfView") || !strcmp( cs, "UnitScaleFactor" ) ) {
+        return new TypedProperty<float>(ParseTokenAsFloat(*tok[4]));
+    }
+    return NULL;
+}
+
+
+// ------------------------------------------------------------------------------------------------
+// peek into an element and check if it contains a FBX property, if so return its name.
+std::string PeekPropertyName(const Element& element)
+{
+    ai_assert(element.KeyToken().StringContents() == "P");
+    const TokenList& tok = element.Tokens();
+    if(tok.size() < 4) {
+        return "";
+    }
+
+    return ParseTokenAsString(*tok[0]);
+}
+
+} //! anon
+
+
+// ------------------------------------------------------------------------------------------------
+PropertyTable::PropertyTable()
+: templateProps()
+, element()
+{
+}
+
+// ------------------------------------------------------------------------------------------------
+PropertyTable::PropertyTable(const Element& element, std::shared_ptr<const PropertyTable> templateProps)
+: templateProps(templateProps)
+, element(&element)
+{
+    const Scope& scope = GetRequiredScope(element);
+    for(const ElementMap::value_type& v : scope.Elements()) {
+        if(v.first != "P") {
+            DOMWarning("expected only P elements in property table",v.second);
+            continue;
+        }
+
+        const std::string& name = PeekPropertyName(*v.second);
+        if(!name.length()) {
+            DOMWarning("could not read property name",v.second);
+            continue;
+        }
+
+        LazyPropertyMap::const_iterator it = lazyProps.find(name);
+        if (it != lazyProps.end()) {
+            DOMWarning("duplicate property name, will hide previous value: " + name,v.second);
+            continue;
+        }
+
+        lazyProps[name] = v.second;
+    }
+}
+
+
+// ------------------------------------------------------------------------------------------------
+PropertyTable::~PropertyTable()
+{
+    for(PropertyMap::value_type& v : props) {
+        delete v.second;
+    }
+}
+
+
+// ------------------------------------------------------------------------------------------------
+const Property* PropertyTable::Get(const std::string& name) const
+{
+    PropertyMap::const_iterator it = props.find(name);
+    if (it == props.end()) {
+        // hasn't been parsed yet?
+        LazyPropertyMap::const_iterator lit = lazyProps.find(name);
+        if(lit != lazyProps.end()) {
+            props[name] = ReadTypedProperty(*(*lit).second);
+            it = props.find(name);
+
+            ai_assert(it != props.end());
+        }
+
+        if (it == props.end()) {
+            // check property template
+            if(templateProps) {
+                return templateProps->Get(name);
+            }
+
+            return NULL;
+        }
+    }
+
+    return (*it).second;
+}
+
+DirectPropertyMap PropertyTable::GetUnparsedProperties() const
+{
+    DirectPropertyMap result;
+
+    // Loop through all the lazy properties (which is all the properties)
+    for(const LazyPropertyMap::value_type& element : lazyProps) {
+
+        // Skip parsed properties
+        if (props.end() != props.find(element.first)) continue;
+
+        // Read the element's value.
+        // Wrap the naked pointer (since the call site is required to acquire ownership)
+        // std::unique_ptr from C++11 would be preferred both as a wrapper and a return value.
+        std::shared_ptr<Property> prop = std::shared_ptr<Property>(ReadTypedProperty(*element.second));
+
+        // Element could not be read. Skip it.
+        if (!prop) continue;
+
+        // Add to result
+        result[element.first] = prop;
+    }
+
+    return result;
+}
+
+} //! FBX
+} //! Assimp
+
+#endif

thirdparty/assimp/code/FBX/FBXProperties.h

@@ -0,0 +1,185 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXProperties.h
+ *  @brief FBX dynamic properties
+ */
+#ifndef INCLUDED_AI_FBX_PROPERTIES_H
+#define INCLUDED_AI_FBX_PROPERTIES_H
+
+#include "FBXCompileConfig.h"
+#include <memory>
+#include <string>
+
+namespace Assimp {
+namespace FBX {
+
+// Forward declarations
+class Element;
+
+/** Represents a dynamic property. Type info added by deriving classes,
+ *  see #TypedProperty.
+ Example:
+ @verbatim
+   P: "ShininessExponent", "double", "Number", "",0.5
+ @endvebatim
+*/
+class Property {
+protected:
+    Property();
+
+public:
+    virtual ~Property();
+
+public:
+    template <typename T>
+    const T* As() const {
+        return dynamic_cast<const T*>(this);
+    }
+};
+
+template<typename T>
+class TypedProperty : public Property {
+public:
+    explicit TypedProperty(const T& value)
+    : value(value) {
+        // empty
+    }
+
+    const T& Value() const {
+        return value;
+    }
+
+private:
+    T value;
+};
+
+
+typedef std::fbx_unordered_map<std::string,std::shared_ptr<Property> > DirectPropertyMap;
+typedef std::fbx_unordered_map<std::string,const Property*>            PropertyMap;
+typedef std::fbx_unordered_map<std::string,const Element*>             LazyPropertyMap;
+
+/** 
+ *  Represents a property table as can be found in the newer FBX files (Properties60, Properties70)
+ */
+class PropertyTable {
+public:
+    // in-memory property table with no source element
+    PropertyTable();
+    PropertyTable(const Element& element, std::shared_ptr<const PropertyTable> templateProps);
+    ~PropertyTable();
+
+    const Property* Get(const std::string& name) const;
+
+    // PropertyTable's need not be coupled with FBX elements so this can be NULL
+    const Element* GetElement() const {
+        return element;
+    }
+
+    const PropertyTable* TemplateProps() const {
+        return templateProps.get();
+    }
+
+    DirectPropertyMap GetUnparsedProperties() const;
+
+private:
+    LazyPropertyMap lazyProps;
+    mutable PropertyMap props;
+    const std::shared_ptr<const PropertyTable> templateProps;
+    const Element* const element;
+};
+
+// ------------------------------------------------------------------------------------------------
+template <typename T>
+inline 
+T PropertyGet(const PropertyTable& in, const std::string& name, const T& defaultValue) {
+    const Property* const prop = in.Get(name);
+    if( nullptr == prop) {
+        return defaultValue;
+    }
+
+    // strong typing, no need to be lenient
+    const TypedProperty<T>* const tprop = prop->As< TypedProperty<T> >();
+    if( nullptr == tprop) {
+        return defaultValue;
+    }
+
+    return tprop->Value();
+}
+
+// ------------------------------------------------------------------------------------------------
+template <typename T>
+inline 
+T PropertyGet(const PropertyTable& in, const std::string& name, bool& result, bool useTemplate=false ) {
+    const Property* prop = in.Get(name);
+    if( nullptr == prop) {
+        if ( ! useTemplate ) {
+            result = false;
+            return T();
+        }
+        const PropertyTable* templ = in.TemplateProps();
+        if ( nullptr == templ ) {
+            result = false;
+            return T();
+        }
+        prop = templ->Get(name);
+        if ( nullptr == prop ) {
+            result = false;
+            return T();
+        }
+    }
+
+    // strong typing, no need to be lenient
+    const TypedProperty<T>* const tprop = prop->As< TypedProperty<T> >();
+    if( nullptr == tprop) {
+        result = false;
+        return T();
+    }
+
+    result = true;
+    return tprop->Value();
+}
+
+} //! FBX
+} //! Assimp
+
+#endif // INCLUDED_AI_FBX_PROPERTIES_H

thirdparty/assimp/code/FBX/FBXTokenizer.cpp

@@ -0,0 +1,248 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXTokenizer.cpp
+ *  @brief Implementation of the FBX broadphase lexer
+ */
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+// tab width for logging columns
+#define ASSIMP_FBX_TAB_WIDTH 4
+
+#include <assimp/ParsingUtils.h>
+
+#include "FBXTokenizer.h"
+#include "FBXUtil.h"
+#include <assimp/Exceptional.h>
+
+namespace Assimp {
+namespace FBX {
+
+// ------------------------------------------------------------------------------------------------
+Token::Token(const char* sbegin, const char* send, TokenType type, unsigned int line, unsigned int column)
+    :
+#ifdef DEBUG
+    contents(sbegin, static_cast<size_t>(send-sbegin)),
+#endif
+    sbegin(sbegin)
+    , send(send)
+    , type(type)
+    , line(line)
+    , column(column)
+{
+    ai_assert(sbegin);
+    ai_assert(send);
+
+    // tokens must be of non-zero length
+    ai_assert(static_cast<size_t>(send-sbegin) > 0);
+}
+
+// ------------------------------------------------------------------------------------------------
+Token::~Token()
+{
+}
+
+namespace {
+
+// ------------------------------------------------------------------------------------------------
+// signal tokenization error, this is always unrecoverable. Throws DeadlyImportError.
+AI_WONT_RETURN void TokenizeError(const std::string& message, unsigned int line, unsigned int column) AI_WONT_RETURN_SUFFIX;
+AI_WONT_RETURN void TokenizeError(const std::string& message, unsigned int line, unsigned int column)
+{
+    throw DeadlyImportError(Util::AddLineAndColumn("FBX-Tokenize",message,line,column));
+}
+
+
+// process a potential data token up to 'cur', adding it to 'output_tokens'.
+// ------------------------------------------------------------------------------------------------
+void ProcessDataToken( TokenList& output_tokens, const char*& start, const char*& end,
+                      unsigned int line,
+                      unsigned int column,
+                      TokenType type = TokenType_DATA,
+                      bool must_have_token = false)
+{
+    if (start && end) {
+        // sanity check:
+        // tokens should have no whitespace outside quoted text and [start,end] should
+        // properly delimit the valid range.
+        bool in_double_quotes = false;
+        for (const char* c = start; c != end + 1; ++c) {
+            if (*c == '\"') {
+                in_double_quotes = !in_double_quotes;
+            }
+
+            if (!in_double_quotes && IsSpaceOrNewLine(*c)) {
+                TokenizeError("unexpected whitespace in token", line, column);
+            }
+        }
+
+        if (in_double_quotes) {
+            TokenizeError("non-terminated double quotes", line, column);
+        }
+
+        output_tokens.push_back(new_Token(start,end + 1,type,line,column));
+    }
+    else if (must_have_token) {
+        TokenizeError("unexpected character, expected data token", line, column);
+    }
+
+    start = end = NULL;
+}
+
+}
+
+// ------------------------------------------------------------------------------------------------
+void Tokenize(TokenList& output_tokens, const char* input)
+{
+    ai_assert(input);
+
+    // line and column numbers numbers are one-based
+    unsigned int line = 1;
+    unsigned int column = 1;
+
+    bool comment = false;
+    bool in_double_quotes = false;
+    bool pending_data_token = false;
+
+    const char* token_begin = NULL, *token_end = NULL;
+    for (const char* cur = input;*cur;column += (*cur == '\t' ? ASSIMP_FBX_TAB_WIDTH : 1), ++cur) {
+        const char c = *cur;
+
+        if (IsLineEnd(c)) {
+            comment = false;
+
+            column = 0;
+            ++line;
+        }
+
+        if(comment) {
+            continue;
+        }
+
+        if(in_double_quotes) {
+            if (c == '\"') {
+                in_double_quotes = false;
+                token_end = cur;
+
+                ProcessDataToken(output_tokens,token_begin,token_end,line,column);
+                pending_data_token = false;
+            }
+            continue;
+        }
+
+        switch(c)
+        {
+        case '\"':
+            if (token_begin) {
+                TokenizeError("unexpected double-quote", line, column);
+            }
+            token_begin = cur;
+            in_double_quotes = true;
+            continue;
+
+        case ';':
+            ProcessDataToken(output_tokens,token_begin,token_end,line,column);
+            comment = true;
+            continue;
+
+        case '{':
+            ProcessDataToken(output_tokens,token_begin,token_end, line, column);
+            output_tokens.push_back(new_Token(cur,cur+1,TokenType_OPEN_BRACKET,line,column));
+            continue;
+
+        case '}':
+            ProcessDataToken(output_tokens,token_begin,token_end,line,column);
+            output_tokens.push_back(new_Token(cur,cur+1,TokenType_CLOSE_BRACKET,line,column));
+            continue;
+
+        case ',':
+            if (pending_data_token) {
+                ProcessDataToken(output_tokens,token_begin,token_end,line,column,TokenType_DATA,true);
+            }
+            output_tokens.push_back(new_Token(cur,cur+1,TokenType_COMMA,line,column));
+            continue;
+
+        case ':':
+            if (pending_data_token) {
+                ProcessDataToken(output_tokens,token_begin,token_end,line,column,TokenType_KEY,true);
+            }
+            else {
+                TokenizeError("unexpected colon", line, column);
+            }
+            continue;
+        }
+
+        if (IsSpaceOrNewLine(c)) {
+
+            if (token_begin) {
+                // peek ahead and check if the next token is a colon in which
+                // case this counts as KEY token.
+                TokenType type = TokenType_DATA;
+                for (const char* peek = cur;  *peek && IsSpaceOrNewLine(*peek); ++peek) {
+                    if (*peek == ':') {
+                        type = TokenType_KEY;
+                        cur = peek;
+                        break;
+                    }
+                }
+
+                ProcessDataToken(output_tokens,token_begin,token_end,line,column,type);
+            }
+
+            pending_data_token = false;
+        }
+        else {
+            token_end = cur;
+            if (!token_begin) {
+                token_begin = cur;
+            }
+
+            pending_data_token = true;
+        }
+    }
+}
+
+} // !FBX
+} // !Assimp
+
+#endif

thirdparty/assimp/code/FBX/FBXTokenizer.h

@@ -0,0 +1,187 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXTokenizer.h
+ *  @brief FBX lexer
+ */
+#ifndef INCLUDED_AI_FBX_TOKENIZER_H
+#define INCLUDED_AI_FBX_TOKENIZER_H
+
+#include "FBXCompileConfig.h"
+#include <assimp/ai_assert.h>
+#include <vector>
+#include <string>
+
+namespace Assimp {
+namespace FBX {
+
+/** Rough classification for text FBX tokens used for constructing the
+ *  basic scope hierarchy. */
+enum TokenType
+{
+    // {
+    TokenType_OPEN_BRACKET = 0,
+
+    // }
+    TokenType_CLOSE_BRACKET,
+
+    // '"blablubb"', '2', '*14' - very general token class,
+    // further processing happens at a later stage.
+    TokenType_DATA,
+
+    //
+    TokenType_BINARY_DATA,
+
+    // ,
+    TokenType_COMMA,
+
+    // blubb:
+    TokenType_KEY
+};
+
+
+/** Represents a single token in a FBX file. Tokens are
+ *  classified by the #TokenType enumerated types.
+ *
+ *  Offers iterator protocol. Tokens are immutable. */
+class Token
+{
+private:
+    static const unsigned int BINARY_MARKER = static_cast<unsigned int>(-1);
+
+public:
+    /** construct a textual token */
+    Token(const char* sbegin, const char* send, TokenType type, unsigned int line, unsigned int column);
+
+    /** construct a binary token */
+    Token(const char* sbegin, const char* send, TokenType type, size_t offset);
+
+    ~Token();
+
+public:
+    std::string StringContents() const {
+        return std::string(begin(),end());
+    }
+
+    bool IsBinary() const {
+        return column == BINARY_MARKER;
+    }
+
+    const char* begin() const {
+        return sbegin;
+    }
+
+    const char* end() const {
+        return send;
+    }
+
+    TokenType Type() const {
+        return type;
+    }
+
+    size_t Offset() const {
+        ai_assert(IsBinary());
+        return offset;
+    }
+
+    unsigned int Line() const {
+        ai_assert(!IsBinary());
+        return static_cast<unsigned int>(line);
+    }
+
+    unsigned int Column() const {
+        ai_assert(!IsBinary());
+        return column;
+    }
+
+private:
+
+#ifdef DEBUG
+    // full string copy for the sole purpose that it nicely appears
+    // in msvc's debugger window.
+    const std::string contents;
+#endif
+
+
+    const char* const sbegin;
+    const char* const send;
+    const TokenType type;
+
+    union {
+        size_t line;
+        size_t offset;
+    };
+    const unsigned int column;
+};
+
+// XXX should use C++11's unique_ptr - but assimp's need to keep working with 03
+typedef const Token* TokenPtr;
+typedef std::vector< TokenPtr > TokenList;
+
+#define new_Token new Token
+
+
+/** Main FBX tokenizer function. Transform input buffer into a list of preprocessed tokens.
+ *
+ *  Skips over comments and generates line and column numbers.
+ *
+ * @param output_tokens Receives a list of all tokens in the input data.
+ * @param input_buffer Textual input buffer to be processed, 0-terminated.
+ * @throw DeadlyImportError if something goes wrong */
+void Tokenize(TokenList& output_tokens, const char* input);
+
+
+/** Tokenizer function for binary FBX files.
+ *
+ *  Emits a token list suitable for direct parsing.
+ *
+ * @param output_tokens Receives a list of all tokens in the input data.
+ * @param input_buffer Binary input buffer to be processed.
+ * @param length Length of input buffer, in bytes. There is no 0-terminal.
+ * @throw DeadlyImportError if something goes wrong */
+void TokenizeBinary(TokenList& output_tokens, const char* input, size_t length);
+
+
+} // ! FBX
+} // ! Assimp
+
+#endif // ! INCLUDED_AI_FBX_PARSER_H

thirdparty/assimp/code/FBX/FBXUtil.cpp

@@ -0,0 +1,243 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXUtil.cpp
+ *  @brief Implementation of internal FBX utility functions
+ */
+
+#include "FBXUtil.h"
+#include "FBXTokenizer.h"
+
+#include <assimp/TinyFormatter.h>
+#include <string>
+#include <cstring>
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+namespace Assimp {
+namespace FBX {
+namespace Util {
+
+// ------------------------------------------------------------------------------------------------
+const char* TokenTypeString(TokenType t)
+{
+    switch(t) {
+        case TokenType_OPEN_BRACKET:
+            return "TOK_OPEN_BRACKET";
+
+        case TokenType_CLOSE_BRACKET:
+            return "TOK_CLOSE_BRACKET";
+
+        case TokenType_DATA:
+            return "TOK_DATA";
+
+        case TokenType_COMMA:
+            return "TOK_COMMA";
+
+        case TokenType_KEY:
+            return "TOK_KEY";
+
+        case TokenType_BINARY_DATA:
+            return "TOK_BINARY_DATA";
+    }
+
+    ai_assert(false);
+    return "";
+}
+
+
+// ------------------------------------------------------------------------------------------------
+std::string AddOffset(const std::string& prefix, const std::string& text, size_t offset)
+{
+    return static_cast<std::string>( (Formatter::format() << prefix << " (offset 0x" << std::hex << offset << ") " << text) );
+}
+
+// ------------------------------------------------------------------------------------------------
+std::string AddLineAndColumn(const std::string& prefix, const std::string& text, unsigned int line, unsigned int column)
+{
+    return static_cast<std::string>( (Formatter::format() << prefix << " (line " << line << " <<  col " << column << ") " << text) );
+}
+
+// ------------------------------------------------------------------------------------------------
+std::string AddTokenText(const std::string& prefix, const std::string& text, const Token* tok)
+{
+    if(tok->IsBinary()) {
+        return static_cast<std::string>( (Formatter::format() << prefix <<
+            " (" << TokenTypeString(tok->Type()) <<
+            ", offset 0x" << std::hex << tok->Offset() << ") " <<
+            text) );
+    }
+
+    return static_cast<std::string>( (Formatter::format() << prefix <<
+        " (" << TokenTypeString(tok->Type()) <<
+        ", line " << tok->Line() <<
+        ", col " << tok->Column() << ") " <<
+        text) );
+}
+
+// Generated by this formula: T["ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[i]] = i;
+static const uint8_t base64DecodeTable[128] = {
+    255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+    255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+    255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 62, 255, 255, 255, 63,
+    52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255, 255, 255, 255, 255,
+    255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
+    15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 255, 255, 255, 255, 255,
+    255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+    41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 255, 255, 255, 255, 255
+};
+
+uint8_t DecodeBase64(char ch)
+{
+    const auto idx = static_cast<uint8_t>(ch);
+    if (idx > 127)
+        return 255;
+    return base64DecodeTable[idx];
+}
+
+size_t ComputeDecodedSizeBase64(const char* in, size_t inLength)
+{
+    if (inLength < 2)
+    {
+        return 0;
+    }
+    const size_t equals = size_t(in[inLength - 1] == '=') + size_t(in[inLength - 2] == '=');
+    const size_t full_length = (inLength * 3) >> 2; // div by 4
+    if (full_length < equals)
+    {
+        return 0;
+    }
+    return full_length - equals;
+}
+
+size_t DecodeBase64(const char* in, size_t inLength, uint8_t* out, size_t maxOutLength)
+{
+    if (maxOutLength == 0 || inLength < 2) {
+        return 0;
+    }
+    const size_t realLength = inLength - size_t(in[inLength - 1] == '=') - size_t(in[inLength - 2] == '=');
+    size_t dst_offset = 0;
+    int val = 0, valb = -8;
+    for (size_t src_offset = 0; src_offset < realLength; ++src_offset)
+    {
+        const uint8_t table_value = Util::DecodeBase64(in[src_offset]);
+        if (table_value == 255)
+        {
+            return 0;
+        }
+        val = (val << 6) + table_value;
+        valb += 6;
+        if (valb >= 0)
+        {
+            out[dst_offset++] = static_cast<uint8_t>((val >> valb) & 0xFF);
+            valb -= 8;
+            val &= 0xFFF;
+        }
+    }
+    return dst_offset;
+}
+
+static const char to_base64_string[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+char EncodeBase64(char byte)
+{
+    return to_base64_string[(size_t)byte];
+}
+
+/** Encodes a block of 4 bytes to base64 encoding
+*
+*  @param bytes Bytes to encode.
+*  @param out_string String to write encoded values to.
+*  @param string_pos Position in out_string.*/
+void EncodeByteBlock(const char* bytes, std::string& out_string, size_t string_pos)
+{
+    char b0 = (bytes[0] & 0xFC) >> 2;
+    char b1 = (bytes[0] & 0x03) << 4 | ((bytes[1] & 0xF0) >> 4);
+    char b2 = (bytes[1] & 0x0F) << 2 | ((bytes[2] & 0xC0) >> 6);
+    char b3 = (bytes[2] & 0x3F);
+
+    out_string[string_pos + 0] = EncodeBase64(b0);
+    out_string[string_pos + 1] = EncodeBase64(b1);
+    out_string[string_pos + 2] = EncodeBase64(b2);
+    out_string[string_pos + 3] = EncodeBase64(b3);
+}
+
+std::string EncodeBase64(const char* data, size_t length)
+{
+    // calculate extra bytes needed to get a multiple of 3
+    size_t extraBytes = 3 - length % 3;
+
+    // number of base64 bytes
+    size_t encodedBytes = 4 * (length + extraBytes) / 3;
+
+    std::string encoded_string(encodedBytes, '=');
+
+    // read blocks of 3 bytes
+    for (size_t ib3 = 0; ib3 < length / 3; ib3++)
+    {
+        const size_t iByte = ib3 * 3;
+        const size_t iEncodedByte = ib3 * 4;
+        const char* currData = &data[iByte];
+
+        EncodeByteBlock(currData, encoded_string, iEncodedByte);
+    }
+
+    // if size of data is not a multiple of 3, also encode the final bytes (and add zeros where needed)
+    if (extraBytes > 0)
+    {
+        char finalBytes[4] = { 0,0,0,0 };
+        memcpy(&finalBytes[0], &data[length - length % 3], length % 3);
+
+        const size_t iEncodedByte = encodedBytes - 4;
+        EncodeByteBlock(&finalBytes[0], encoded_string, iEncodedByte);
+
+        // add '=' at the end
+        for (size_t i = 0; i < 4 * extraBytes / 3; i++)
+            encoded_string[encodedBytes - i - 1] = '=';
+    }
+    return encoded_string;
+}
+
+} // !Util
+} // !FBX
+} // !Assimp
+
+#endif

thirdparty/assimp/code/FBX/FBXUtil.h

@@ -0,0 +1,137 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  FBXUtil.h
+ *  @brief FBX utility functions for internal use
+ */
+#ifndef INCLUDED_AI_FBX_UTIL_H
+#define INCLUDED_AI_FBX_UTIL_H
+
+#include "FBXCompileConfig.h"
+#include "FBXTokenizer.h"
+#include <stdint.h>
+
+namespace Assimp {
+namespace FBX {
+
+
+namespace Util {
+
+
+/** helper for std::for_each to delete all heap-allocated items in a container */
+template<typename T>
+struct delete_fun
+{
+    void operator()(const volatile T* del) {
+        delete del;
+    }
+};
+
+/** Get a string representation for a #TokenType. */
+const char* TokenTypeString(TokenType t);
+
+
+
+/** Format log/error messages using a given offset in the source binary file
+ *
+ *  @param prefix Message prefix to be preprended to the location info.
+ *  @param text Message text
+ *  @param line Line index, 1-based
+ *  @param column Column index, 1-based
+ *  @return A string of the following format: {prefix} (offset 0x{offset}) {text}*/
+std::string AddOffset(const std::string& prefix, const std::string& text, size_t offset);
+
+
+/** Format log/error messages using a given line location in the source file.
+ *
+ *  @param prefix Message prefix to be preprended to the location info.
+ *  @param text Message text
+ *  @param line Line index, 1-based
+ *  @param column Column index, 1-based
+ *  @return A string of the following format: {prefix} (line {line}, col {column}) {text}*/
+std::string AddLineAndColumn(const std::string& prefix, const std::string& text, unsigned int line, unsigned int column);
+
+
+/** Format log/error messages using a given cursor token.
+ *
+ *  @param prefix Message prefix to be preprended to the location info.
+ *  @param text Message text
+ *  @param tok Token where parsing/processing stopped
+ *  @return A string of the following format: {prefix} ({token-type}, line {line}, col {column}) {text}*/
+std::string AddTokenText(const std::string& prefix, const std::string& text, const Token* tok);
+
+/** Decode a single Base64-encoded character.
+*
+*  @param ch Character to decode (from base64 to binary).
+*  @return decoded byte value*/
+uint8_t DecodeBase64(char ch);
+
+/** Compute decoded size of a Base64-encoded string
+*
+*  @param in Characters to decode.
+*  @param inLength Number of characters to decode.
+*  @return size of the decoded data (number of bytes)*/
+size_t ComputeDecodedSizeBase64(const char* in, size_t inLength);
+
+/** Decode a Base64-encoded string
+*
+*  @param in Characters to decode.
+*  @param inLength Number of characters to decode.
+*  @param out Pointer where we will store the decoded data.
+*  @param maxOutLength Size of output buffer.
+*  @return size of the decoded data (number of bytes)*/
+size_t DecodeBase64(const char* in, size_t inLength, uint8_t* out, size_t maxOutLength);
+
+char EncodeBase64(char byte);
+
+/** Encode bytes in base64-encoding
+*
+*  @param data Binary data to encode.
+*  @param inLength Number of bytes to encode.
+*  @return base64-encoded string*/
+std::string EncodeBase64(const char* data, size_t length);
+
+}
+}
+}
+
+#endif // ! INCLUDED_AI_FBX_UTIL_H