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Model loading and texturing

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This commit is contained in:
Dane Johnson
2021-01-18 18:25:47 -06:00
parent 66bf7776c7
commit 155b572aca
1283 changed files with 533814 additions and 42 deletions
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thirdparty/assimp/code/AC/ACLoader.cpp vendored Normal file
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/*
---------------------------------------------------------------------------
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 Implementation of the AC3D importer class */
#ifndef ASSIMP_BUILD_NO_AC_IMPORTER
// internal headers
#include "ACLoader.h"
#include <assimp/ParsingUtils.h>
#include <assimp/fast_atof.h>
#include <assimp/Subdivision.h>
#include "Common/Importer.h"
#include <assimp/BaseImporter.h>
#include <assimp/Importer.hpp>
#include <assimp/light.h>
#include <assimp/DefaultLogger.hpp>
#include <assimp/material.h>
#include <assimp/scene.h>
#include <assimp/config.h>
#include <assimp/IOSystem.hpp>
#include <assimp/importerdesc.h>
#include <memory>
using namespace Assimp;
static const aiImporterDesc desc = {
"AC3D Importer",
"",
"",
"",
aiImporterFlags_SupportTextFlavour,
0,
0,
0,
0,
"ac acc ac3d"
};
// ------------------------------------------------------------------------------------------------
// skip to the next token
#define AI_AC_SKIP_TO_NEXT_TOKEN() \
if (!SkipSpaces(&buffer)) \
{ \
ASSIMP_LOG_ERROR("AC3D: Unexpected EOF/EOL"); \
continue; \
}
// ------------------------------------------------------------------------------------------------
// read a string (may be enclosed in double quotation marks). buffer must point to "
#define AI_AC_GET_STRING(out) \
if (*buffer == '\0') { \
throw DeadlyImportError("AC3D: Unexpected EOF in string"); \
} \
++buffer; \
const char* sz = buffer; \
while ('\"' != *buffer) \
{ \
if (IsLineEnd( *buffer )) \
{ \
ASSIMP_LOG_ERROR("AC3D: Unexpected EOF/EOL in string"); \
out = "ERROR"; \
break; \
} \
++buffer; \
} \
if (IsLineEnd( *buffer ))continue; \
out = std::string(sz,(unsigned int)(buffer-sz)); \
++buffer;
// ------------------------------------------------------------------------------------------------
// read 1 to n floats prefixed with an optional predefined identifier
#define AI_AC_CHECKED_LOAD_FLOAT_ARRAY(name,name_length,num,out) \
AI_AC_SKIP_TO_NEXT_TOKEN(); \
if (name_length) \
{ \
if (strncmp(buffer,name,name_length) || !IsSpace(buffer[name_length])) \
{ \
ASSIMP_LOG_ERROR("AC3D: Unexpexted token. " name " was expected."); \
continue; \
} \
buffer += name_length+1; \
} \
for (unsigned int i = 0; i < num;++i) \
{ \
AI_AC_SKIP_TO_NEXT_TOKEN(); \
buffer = fast_atoreal_move<float>(buffer,((float*)out)[i]); \
}
// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by Importer
AC3DImporter::AC3DImporter()
: buffer(),
configSplitBFCull(),
configEvalSubdivision(),
mNumMeshes(),
mLights(),
lights(),
groups(),
polys(),
worlds()
{
// nothing to be done here
}
// ------------------------------------------------------------------------------------------------
// Destructor, private as well
AC3DImporter::~AC3DImporter()
{
// nothing to be done here
}
// ------------------------------------------------------------------------------------------------
// Returns whether the class can handle the format of the given file.
bool AC3DImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const
{
std::string extension = GetExtension(pFile);
// fixme: are acc and ac3d *really* used? Some sources say they are
if(extension == "ac" || extension == "ac3d" || extension == "acc") {
return true;
}
if (!extension.length() || checkSig) {
uint32_t token = AI_MAKE_MAGIC("AC3D");
return CheckMagicToken(pIOHandler,pFile,&token,1,0);
}
return false;
}
// ------------------------------------------------------------------------------------------------
// Loader meta information
const aiImporterDesc* AC3DImporter::GetInfo () const
{
return &desc;
}
// ------------------------------------------------------------------------------------------------
// Get a pointer to the next line from the file
bool AC3DImporter::GetNextLine( )
{
SkipLine(&buffer);
return SkipSpaces(&buffer);
}
// ------------------------------------------------------------------------------------------------
// Parse an object section in an AC file
void AC3DImporter::LoadObjectSection(std::vector<Object>& objects)
{
if (!TokenMatch(buffer,"OBJECT",6))
return;
SkipSpaces(&buffer);
++mNumMeshes;
objects.push_back(Object());
Object& obj = objects.back();
aiLight* light = NULL;
if (!ASSIMP_strincmp(buffer,"light",5))
{
// This is a light source. Add it to the list
mLights->push_back(light = new aiLight());
// Return a point light with no attenuation
light->mType = aiLightSource_POINT;
light->mColorDiffuse = light->mColorSpecular = aiColor3D(1.f,1.f,1.f);
light->mAttenuationConstant = 1.f;
// Generate a default name for both the light source and the node
// FIXME - what's the right way to print a size_t? Is 'zu' universally available? stick with the safe version.
light->mName.length = ::ai_snprintf(light->mName.data, MAXLEN, "ACLight_%i",static_cast<unsigned int>(mLights->size())-1);
obj.name = std::string( light->mName.data );
ASSIMP_LOG_DEBUG("AC3D: Light source encountered");
obj.type = Object::Light;
}
else if (!ASSIMP_strincmp(buffer,"group",5))
{
obj.type = Object::Group;
}
else if (!ASSIMP_strincmp(buffer,"world",5))
{
obj.type = Object::World;
}
else obj.type = Object::Poly;
while (GetNextLine())
{
if (TokenMatch(buffer,"kids",4))
{
SkipSpaces(&buffer);
unsigned int num = strtoul10(buffer,&buffer);
GetNextLine();
if (num)
{
// load the children of this object recursively
obj.children.reserve(num);
for (unsigned int i = 0; i < num; ++i)
LoadObjectSection(obj.children);
}
return;
}
else if (TokenMatch(buffer,"name",4))
{
SkipSpaces(&buffer);
AI_AC_GET_STRING(obj.name);
// If this is a light source, we'll also need to store
// the name of the node in it.
if (light)
{
light->mName.Set(obj.name);
}
}
else if (TokenMatch(buffer,"texture",7))
{
SkipSpaces(&buffer);
AI_AC_GET_STRING(obj.texture);
}
else if (TokenMatch(buffer,"texrep",6))
{
SkipSpaces(&buffer);
AI_AC_CHECKED_LOAD_FLOAT_ARRAY("",0,2,&obj.texRepeat);
if (!obj.texRepeat.x || !obj.texRepeat.y)
obj.texRepeat = aiVector2D (1.f,1.f);
}
else if (TokenMatch(buffer,"texoff",6))
{
SkipSpaces(&buffer);
AI_AC_CHECKED_LOAD_FLOAT_ARRAY("",0,2,&obj.texOffset);
}
else if (TokenMatch(buffer,"rot",3))
{
SkipSpaces(&buffer);
AI_AC_CHECKED_LOAD_FLOAT_ARRAY("",0,9,&obj.rotation);
}
else if (TokenMatch(buffer,"loc",3))
{
SkipSpaces(&buffer);
AI_AC_CHECKED_LOAD_FLOAT_ARRAY("",0,3,&obj.translation);
}
else if (TokenMatch(buffer,"subdiv",6))
{
SkipSpaces(&buffer);
obj.subDiv = strtoul10(buffer,&buffer);
}
else if (TokenMatch(buffer,"crease",6))
{
SkipSpaces(&buffer);
obj.crease = fast_atof(buffer);
}
else if (TokenMatch(buffer,"numvert",7))
{
SkipSpaces(&buffer);
unsigned int t = strtoul10(buffer,&buffer);
if (t >= AI_MAX_ALLOC(aiVector3D)) {
throw DeadlyImportError("AC3D: Too many vertices, would run out of memory");
}
obj.vertices.reserve(t);
for (unsigned int i = 0; i < t;++i)
{
if (!GetNextLine())
{
ASSIMP_LOG_ERROR("AC3D: Unexpected EOF: not all vertices have been parsed yet");
break;
}
else if (!IsNumeric(*buffer))
{
ASSIMP_LOG_ERROR("AC3D: Unexpected token: not all vertices have been parsed yet");
--buffer; // make sure the line is processed a second time
break;
}
obj.vertices.push_back(aiVector3D());
aiVector3D& v = obj.vertices.back();
AI_AC_CHECKED_LOAD_FLOAT_ARRAY("",0,3,&v.x);
}
}
else if (TokenMatch(buffer,"numsurf",7))
{
SkipSpaces(&buffer);
bool Q3DWorkAround = false;
const unsigned int t = strtoul10(buffer,&buffer);
obj.surfaces.reserve(t);
for (unsigned int i = 0; i < t;++i)
{
GetNextLine();
if (!TokenMatch(buffer,"SURF",4))
{
// FIX: this can occur for some files - Quick 3D for
// example writes no surf chunks
if (!Q3DWorkAround)
{
ASSIMP_LOG_WARN("AC3D: SURF token was expected");
ASSIMP_LOG_DEBUG("Continuing with Quick3D Workaround enabled");
}
--buffer; // make sure the line is processed a second time
// break; --- see fix notes above
Q3DWorkAround = true;
}
SkipSpaces(&buffer);
obj.surfaces.push_back(Surface());
Surface& surf = obj.surfaces.back();
surf.flags = strtoul_cppstyle(buffer);
while (1)
{
if(!GetNextLine())
{
throw DeadlyImportError("AC3D: Unexpected EOF: surface is incomplete");
}
if (TokenMatch(buffer,"mat",3))
{
SkipSpaces(&buffer);
surf.mat = strtoul10(buffer);
}
else if (TokenMatch(buffer,"refs",4))
{
// --- see fix notes above
if (Q3DWorkAround)
{
if (!surf.entries.empty())
{
buffer -= 6;
break;
}
}
SkipSpaces(&buffer);
const unsigned int m = strtoul10(buffer);
surf.entries.reserve(m);
obj.numRefs += m;
for (unsigned int k = 0; k < m; ++k)
{
if(!GetNextLine())
{
ASSIMP_LOG_ERROR("AC3D: Unexpected EOF: surface references are incomplete");
break;
}
surf.entries.push_back(Surface::SurfaceEntry());
Surface::SurfaceEntry& entry = surf.entries.back();
entry.first = strtoul10(buffer,&buffer);
SkipSpaces(&buffer);
AI_AC_CHECKED_LOAD_FLOAT_ARRAY("",0,2,&entry.second);
}
}
else
{
--buffer; // make sure the line is processed a second time
break;
}
}
}
}
}
ASSIMP_LOG_ERROR("AC3D: Unexpected EOF: \'kids\' line was expected");
}
// ------------------------------------------------------------------------------------------------
// Convert a material from AC3DImporter::Material to aiMaterial
void AC3DImporter::ConvertMaterial(const Object& object,
const Material& matSrc,
aiMaterial& matDest)
{
aiString s;
if (matSrc.name.length())
{
s.Set(matSrc.name);
matDest.AddProperty(&s,AI_MATKEY_NAME);
}
if (object.texture.length())
{
s.Set(object.texture);
matDest.AddProperty(&s,AI_MATKEY_TEXTURE_DIFFUSE(0));
// UV transformation
if (1.f != object.texRepeat.x || 1.f != object.texRepeat.y ||
object.texOffset.x || object.texOffset.y)
{
aiUVTransform transform;
transform.mScaling = object.texRepeat;
transform.mTranslation = object.texOffset;
matDest.AddProperty(&transform,1,AI_MATKEY_UVTRANSFORM_DIFFUSE(0));
}
}
matDest.AddProperty<aiColor3D>(&matSrc.rgb,1, AI_MATKEY_COLOR_DIFFUSE);
matDest.AddProperty<aiColor3D>(&matSrc.amb,1, AI_MATKEY_COLOR_AMBIENT);
matDest.AddProperty<aiColor3D>(&matSrc.emis,1,AI_MATKEY_COLOR_EMISSIVE);
matDest.AddProperty<aiColor3D>(&matSrc.spec,1,AI_MATKEY_COLOR_SPECULAR);
int n;
if (matSrc.shin)
{
n = aiShadingMode_Phong;
matDest.AddProperty<float>(&matSrc.shin,1,AI_MATKEY_SHININESS);
}
else n = aiShadingMode_Gouraud;
matDest.AddProperty<int>(&n,1,AI_MATKEY_SHADING_MODEL);
float f = 1.f - matSrc.trans;
matDest.AddProperty<float>(&f,1,AI_MATKEY_OPACITY);
}
// ------------------------------------------------------------------------------------------------
// Converts the loaded data to the internal verbose representation
aiNode* AC3DImporter::ConvertObjectSection(Object& object,
std::vector<aiMesh*>& meshes,
std::vector<aiMaterial*>& outMaterials,
const std::vector<Material>& materials,
aiNode* parent)
{
aiNode* node = new aiNode();
node->mParent = parent;
if (object.vertices.size())
{
if (!object.surfaces.size() || !object.numRefs)
{
/* " An object with 7 vertices (no surfaces, no materials defined).
This is a good way of getting point data into AC3D.
The Vertex->create convex-surface/object can be used on these
vertices to 'wrap' a 3d shape around them "
(http://www.opencity.info/html/ac3dfileformat.html)
therefore: if no surfaces are defined return point data only
*/
ASSIMP_LOG_INFO("AC3D: No surfaces defined in object definition, "
"a point list is returned");
meshes.push_back(new aiMesh());
aiMesh* mesh = meshes.back();
mesh->mNumFaces = mesh->mNumVertices = (unsigned int)object.vertices.size();
aiFace* faces = mesh->mFaces = new aiFace[mesh->mNumFaces];
aiVector3D* verts = mesh->mVertices = new aiVector3D[mesh->mNumVertices];
for (unsigned int i = 0; i < mesh->mNumVertices;++i,++faces,++verts)
{
*verts = object.vertices[i];
faces->mNumIndices = 1;
faces->mIndices = new unsigned int[1];
faces->mIndices[0] = i;
}
// use the primary material in this case. this should be the
// default material if all objects of the file contain points
// and no faces.
mesh->mMaterialIndex = 0;
outMaterials.push_back(new aiMaterial());
ConvertMaterial(object, materials[0], *outMaterials.back());
}
else
{
// need to generate one or more meshes for this object.
// find out how many different materials we have
typedef std::pair< unsigned int, unsigned int > IntPair;
typedef std::vector< IntPair > MatTable;
MatTable needMat(materials.size(),IntPair(0,0));
std::vector<Surface>::iterator it,end = object.surfaces.end();
std::vector<Surface::SurfaceEntry>::iterator it2,end2;
for (it = object.surfaces.begin(); it != end; ++it)
{
unsigned int idx = (*it).mat;
if (idx >= needMat.size())
{
ASSIMP_LOG_ERROR("AC3D: material index is out of range");
idx = 0;
}
if ((*it).entries.empty())
{
ASSIMP_LOG_WARN("AC3D: surface her zero vertex references");
}
// validate all vertex indices to make sure we won't crash here
for (it2 = (*it).entries.begin(),
end2 = (*it).entries.end(); it2 != end2; ++it2)
{
if ((*it2).first >= object.vertices.size())
{
ASSIMP_LOG_WARN("AC3D: Invalid vertex reference");
(*it2).first = 0;
}
}
if (!needMat[idx].first)++node->mNumMeshes;
switch ((*it).flags & 0xf)
{
// closed line
case 0x1:
needMat[idx].first += (unsigned int)(*it).entries.size();
needMat[idx].second += (unsigned int)(*it).entries.size()<<1u;
break;
// unclosed line
case 0x2:
needMat[idx].first += (unsigned int)(*it).entries.size()-1;
needMat[idx].second += ((unsigned int)(*it).entries.size()-1)<<1u;
break;
// 0 == polygon, else unknown
default:
if ((*it).flags & 0xf)
{
ASSIMP_LOG_WARN("AC3D: The type flag of a surface is unknown");
(*it).flags &= ~(0xf);
}
// the number of faces increments by one, the number
// of vertices by surface.numref.
needMat[idx].first++;
needMat[idx].second += (unsigned int)(*it).entries.size();
};
}
unsigned int* pip = node->mMeshes = new unsigned int[node->mNumMeshes];
unsigned int mat = 0;
const size_t oldm = meshes.size();
for (MatTable::const_iterator cit = needMat.begin(), cend = needMat.end();
cit != cend; ++cit, ++mat)
{
if (!(*cit).first)continue;
// allocate a new aiMesh object
*pip++ = (unsigned int)meshes.size();
aiMesh* mesh = new aiMesh();
meshes.push_back(mesh);
mesh->mMaterialIndex = (unsigned int)outMaterials.size();
outMaterials.push_back(new aiMaterial());
ConvertMaterial(object, materials[mat], *outMaterials.back());
// allocate storage for vertices and normals
mesh->mNumFaces = (*cit).first;
if (mesh->mNumFaces == 0) {
throw DeadlyImportError("AC3D: No faces");
} else if (mesh->mNumFaces > AI_MAX_ALLOC(aiFace)) {
throw DeadlyImportError("AC3D: Too many faces, would run out of memory");
}
aiFace* faces = mesh->mFaces = new aiFace[mesh->mNumFaces];
mesh->mNumVertices = (*cit).second;
if (mesh->mNumVertices == 0) {
throw DeadlyImportError("AC3D: No vertices");
} else if (mesh->mNumVertices > AI_MAX_ALLOC(aiVector3D)) {
throw DeadlyImportError("AC3D: Too many vertices, would run out of memory");
}
aiVector3D* vertices = mesh->mVertices = new aiVector3D[mesh->mNumVertices];
unsigned int cur = 0;
// allocate UV coordinates, but only if the texture name for the
// surface is not empty
aiVector3D* uv = NULL;
if(object.texture.length())
{
uv = mesh->mTextureCoords[0] = new aiVector3D[mesh->mNumVertices];
mesh->mNumUVComponents[0] = 2;
}
for (it = object.surfaces.begin(); it != end; ++it)
{
if (mat == (*it).mat)
{
const Surface& src = *it;
// closed polygon
unsigned int type = (*it).flags & 0xf;
if (!type)
{
aiFace& face = *faces++;
if((face.mNumIndices = (unsigned int)src.entries.size()))
{
face.mIndices = new unsigned int[face.mNumIndices];
for (unsigned int i = 0; i < face.mNumIndices;++i,++vertices)
{
const Surface::SurfaceEntry& entry = src.entries[i];
face.mIndices[i] = cur++;
// copy vertex positions
if (static_cast<unsigned>(vertices - mesh->mVertices) >= mesh->mNumVertices) {
throw DeadlyImportError("AC3D: Invalid number of vertices");
}
*vertices = object.vertices[entry.first] + object.translation;
// copy texture coordinates
if (uv)
{
uv->x = entry.second.x;
uv->y = entry.second.y;
++uv;
}
}
}
}
else
{
it2 = (*it).entries.begin();
// either a closed or an unclosed line
unsigned int tmp = (unsigned int)(*it).entries.size();
if (0x2 == type)--tmp;
for (unsigned int m = 0; m < tmp;++m)
{
aiFace& face = *faces++;
face.mNumIndices = 2;
face.mIndices = new unsigned int[2];
face.mIndices[0] = cur++;
face.mIndices[1] = cur++;
// copy vertex positions
if (it2 == (*it).entries.end() ) {
throw DeadlyImportError("AC3D: Bad line");
}
ai_assert((*it2).first < object.vertices.size());
*vertices++ = object.vertices[(*it2).first];
// copy texture coordinates
if (uv)
{
uv->x = (*it2).second.x;
uv->y = (*it2).second.y;
++uv;
}
if (0x1 == type && tmp-1 == m)
{
// if this is a closed line repeat its beginning now
it2 = (*it).entries.begin();
}
else ++it2;
// second point
*vertices++ = object.vertices[(*it2).first];
if (uv)
{
uv->x = (*it2).second.x;
uv->y = (*it2).second.y;
++uv;
}
}
}
}
}
}
// Now apply catmull clark subdivision if necessary. We split meshes into
// materials which is not done by AC3D during smoothing, so we need to
// collect all meshes using the same material group.
if (object.subDiv) {
if (configEvalSubdivision) {
std::unique_ptr<Subdivider> div(Subdivider::Create(Subdivider::CATMULL_CLARKE));
ASSIMP_LOG_INFO("AC3D: Evaluating subdivision surface: "+object.name);
std::vector<aiMesh*> cpy(meshes.size()-oldm,NULL);
div->Subdivide(&meshes[oldm],cpy.size(),&cpy.front(),object.subDiv,true);
std::copy(cpy.begin(),cpy.end(),meshes.begin()+oldm);
// previous meshes are deleted vy Subdivide().
}
else {
ASSIMP_LOG_INFO("AC3D: Letting the subdivision surface untouched due to my configuration: "
+object.name);
}
}
}
}
if (object.name.length())
node->mName.Set(object.name);
else
{
// generate a name depending on the type of the node
switch (object.type)
{
case Object::Group:
node->mName.length = ::ai_snprintf(node->mName.data, MAXLEN, "ACGroup_%i",groups++);
break;
case Object::Poly:
node->mName.length = ::ai_snprintf(node->mName.data, MAXLEN, "ACPoly_%i",polys++);
break;
case Object::Light:
node->mName.length = ::ai_snprintf(node->mName.data, MAXLEN, "ACLight_%i",lights++);
break;
// there shouldn't be more than one world, but we don't care
case Object::World:
node->mName.length = ::ai_snprintf(node->mName.data, MAXLEN, "ACWorld_%i",worlds++);
break;
}
}
// setup the local transformation matrix of the object
// compute the transformation offset to the parent node
node->mTransformation = aiMatrix4x4 ( object.rotation );
if (object.type == Object::Group || !object.numRefs)
{
node->mTransformation.a4 = object.translation.x;
node->mTransformation.b4 = object.translation.y;
node->mTransformation.c4 = object.translation.z;
}
// add children to the object
if (object.children.size())
{
node->mNumChildren = (unsigned int)object.children.size();
node->mChildren = new aiNode*[node->mNumChildren];
for (unsigned int i = 0; i < node->mNumChildren;++i)
{
node->mChildren[i] = ConvertObjectSection(object.children[i],meshes,outMaterials,materials,node);
}
}
return node;
}
// ------------------------------------------------------------------------------------------------
void AC3DImporter::SetupProperties(const Importer* pImp)
{
configSplitBFCull = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_AC_SEPARATE_BFCULL,1) ? true : false;
configEvalSubdivision = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_AC_EVAL_SUBDIVISION,1) ? true : false;
}
// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure.
void AC3DImporter::InternReadFile( const std::string& pFile,
aiScene* pScene, IOSystem* pIOHandler)
{
std::unique_ptr<IOStream> file( pIOHandler->Open( pFile, "rb"));
// Check whether we can read from the file
if( file.get() == NULL)
throw DeadlyImportError( "Failed to open AC3D file " + pFile + ".");
// allocate storage and copy the contents of the file to a memory buffer
std::vector<char> mBuffer2;
TextFileToBuffer(file.get(),mBuffer2);
buffer = &mBuffer2[0];
mNumMeshes = 0;
lights = polys = worlds = groups = 0;
if (::strncmp(buffer,"AC3D",4)) {
throw DeadlyImportError("AC3D: No valid AC3D file, magic sequence not found");
}
// print the file format version to the console
unsigned int version = HexDigitToDecimal( buffer[4] );
char msg[3];
ASSIMP_itoa10(msg,3,version);
ASSIMP_LOG_INFO_F("AC3D file format version: ", msg);
std::vector<Material> materials;
materials.reserve(5);
std::vector<Object> rootObjects;
rootObjects.reserve(5);
std::vector<aiLight*> lights;
mLights = & lights;
while (GetNextLine())
{
if (TokenMatch(buffer,"MATERIAL",8))
{
materials.push_back(Material());
Material& mat = materials.back();
// manually parse the material ... sscanf would use the buldin atof ...
// Format: (name) rgb %f %f %f amb %f %f %f emis %f %f %f spec %f %f %f shi %d trans %f
AI_AC_SKIP_TO_NEXT_TOKEN();
if ('\"' == *buffer)
{
AI_AC_GET_STRING(mat.name);
AI_AC_SKIP_TO_NEXT_TOKEN();
}
AI_AC_CHECKED_LOAD_FLOAT_ARRAY("rgb",3,3,&mat.rgb);
AI_AC_CHECKED_LOAD_FLOAT_ARRAY("amb",3,3,&mat.amb);
AI_AC_CHECKED_LOAD_FLOAT_ARRAY("emis",4,3,&mat.emis);
AI_AC_CHECKED_LOAD_FLOAT_ARRAY("spec",4,3,&mat.spec);
AI_AC_CHECKED_LOAD_FLOAT_ARRAY("shi",3,1,&mat.shin);
AI_AC_CHECKED_LOAD_FLOAT_ARRAY("trans",5,1,&mat.trans);
}
LoadObjectSection(rootObjects);
}
if (rootObjects.empty() || !mNumMeshes)
{
throw DeadlyImportError("AC3D: No meshes have been loaded");
}
if (materials.empty())
{
ASSIMP_LOG_WARN("AC3D: No material has been found");
materials.push_back(Material());
}
mNumMeshes += (mNumMeshes>>2u) + 1;
std::vector<aiMesh*> meshes;
meshes.reserve(mNumMeshes);
std::vector<aiMaterial*> omaterials;
materials.reserve(mNumMeshes);
// generate a dummy root if there are multiple objects on the top layer
Object* root;
if (1 == rootObjects.size())
root = &rootObjects[0];
else
{
root = new Object();
}
// now convert the imported stuff to our output data structure
pScene->mRootNode = ConvertObjectSection(*root,meshes,omaterials,materials);
if (1 != rootObjects.size())delete root;
if (!::strncmp( pScene->mRootNode->mName.data, "Node", 4))
pScene->mRootNode->mName.Set("<AC3DWorld>");
// copy meshes
if (meshes.empty())
{
throw DeadlyImportError("An unknown error occurred during converting");
}
pScene->mNumMeshes = (unsigned int)meshes.size();
pScene->mMeshes = new aiMesh*[pScene->mNumMeshes];
::memcpy(pScene->mMeshes,&meshes[0],pScene->mNumMeshes*sizeof(void*));
// copy materials
pScene->mNumMaterials = (unsigned int)omaterials.size();
pScene->mMaterials = new aiMaterial*[pScene->mNumMaterials];
::memcpy(pScene->mMaterials,&omaterials[0],pScene->mNumMaterials*sizeof(void*));
// copy lights
pScene->mNumLights = (unsigned int)lights.size();
if (lights.size())
{
pScene->mLights = new aiLight*[lights.size()];
::memcpy(pScene->mLights,&lights[0],lights.size()*sizeof(void*));
}
}
#endif //!defined ASSIMP_BUILD_NO_AC_IMPORTER

276
thirdparty/assimp/code/AC/ACLoader.h vendored Normal file
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/*
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 ACLoader.h
* @brief Declaration of the .ac importer class.
*/
#ifndef AI_AC3DLOADER_H_INCLUDED
#define AI_AC3DLOADER_H_INCLUDED
#include <vector>
#include <assimp/BaseImporter.h>
#include <assimp/types.h>
struct aiNode;
struct aiMesh;
struct aiMaterial;
struct aiLight;
namespace Assimp {
// ---------------------------------------------------------------------------
/** AC3D (*.ac) importer class
*/
class AC3DImporter : public BaseImporter
{
public:
AC3DImporter();
~AC3DImporter();
// Represents an AC3D material
struct Material
{
Material()
: rgb (0.6f,0.6f,0.6f)
, spec (1.f,1.f,1.f)
, shin (0.f)
, trans (0.f)
{}
// base color of the material
aiColor3D rgb;
// ambient color of the material
aiColor3D amb;
// emissive color of the material
aiColor3D emis;
// specular color of the material
aiColor3D spec;
// shininess exponent
float shin;
// transparency. 0 == opaque
float trans;
// name of the material. optional.
std::string name;
};
// Represents an AC3D surface
struct Surface
{
Surface()
: mat (0)
, flags (0)
{}
unsigned int mat,flags;
typedef std::pair<unsigned int, aiVector2D > SurfaceEntry;
std::vector< SurfaceEntry > entries;
};
// Represents an AC3D object
struct Object
{
Object()
: type (World)
, name( "" )
, children()
, texture( "" )
, texRepeat( 1.f, 1.f )
, texOffset( 0.0f, 0.0f )
, rotation()
, translation()
, vertices()
, surfaces()
, numRefs (0)
, subDiv (0)
, crease()
{}
// Type description
enum Type
{
World = 0x0,
Poly = 0x1,
Group = 0x2,
Light = 0x4
} type;
// name of the object
std::string name;
// object children
std::vector<Object> children;
// texture to be assigned to all surfaces of the object
std::string texture;
// texture repat factors (scaling for all coordinates)
aiVector2D texRepeat, texOffset;
// rotation matrix
aiMatrix3x3 rotation;
// translation vector
aiVector3D translation;
// vertices
std::vector<aiVector3D> vertices;
// surfaces
std::vector<Surface> surfaces;
// number of indices (= num verts in verbose format)
unsigned int numRefs;
// number of subdivisions to be performed on the
// imported data
unsigned int subDiv;
// max angle limit for smoothing
float crease;
};
public:
// -------------------------------------------------------------------
/** Returns whether the class can handle the format of the given file.
* See BaseImporter::CanRead() for details.
*/
bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
bool checkSig) const;
protected:
// -------------------------------------------------------------------
/** Return importer meta information.
* See #BaseImporter::GetInfo for the details */
const aiImporterDesc* GetInfo () const;
// -------------------------------------------------------------------
/** Imports the given file into the given scene structure.
* See BaseImporter::InternReadFile() for details*/
void InternReadFile( const std::string& pFile, aiScene* pScene,
IOSystem* pIOHandler);
// -------------------------------------------------------------------
/** Called prior to ReadFile().
* The function is a request to the importer to update its configuration
* basing on the Importer's configuration property list.*/
void SetupProperties(const Importer* pImp);
private:
// -------------------------------------------------------------------
/** Get the next line from the file.
* @return false if the end of the file was reached*/
bool GetNextLine();
// -------------------------------------------------------------------
/** Load the object section. This method is called recursively to
* load subobjects, the method returns after a 'kids 0' was
* encountered.
* @objects List of output objects*/
void LoadObjectSection(std::vector<Object>& objects);
// -------------------------------------------------------------------
/** Convert all objects into meshes and nodes.
* @param object Current object to work on
* @param meshes Pointer to the list of output meshes
* @param outMaterials List of output materials
* @param materials Material list
* @param Scenegraph node for the object */
aiNode* ConvertObjectSection(Object& object,
std::vector<aiMesh*>& meshes,
std::vector<aiMaterial*>& outMaterials,
const std::vector<Material>& materials,
aiNode* parent = NULL);
// -------------------------------------------------------------------
/** Convert a material
* @param object Current object
* @param matSrc Source material description
* @param matDest Destination material to be filled */
void ConvertMaterial(const Object& object,
const Material& matSrc,
aiMaterial& matDest);
private:
// points to the next data line
const char* buffer;
// Configuration option: if enabled, up to two meshes
// are generated per material: those faces who have
// their bf cull flags set are separated.
bool configSplitBFCull;
// Configuration switch: subdivision surfaces are only
// evaluated if the value is true.
bool configEvalSubdivision;
// counts how many objects we have in the tree.
// basing on this information we can find a
// good estimate how many meshes we'll have in the final scene.
unsigned int mNumMeshes;
// current list of light sources
std::vector<aiLight*>* mLights;
// name counters
unsigned int lights, groups, polys, worlds;
};
} // end of namespace Assimp
#endif // AI_AC3DIMPORTER_H_INC