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Externalize Assimp

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This commit is contained in:
Dane Johnson
2021-02-05 11:22:37 -06:00
parent d84681c23a
commit 35d18c0f16
1032 changed files with 42 additions and 441932 deletions
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233
thirdparty/assimp/code/STL/STLExporter.cpp vendored
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@@ -1,233 +0,0 @@
/*
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.
----------------------------------------------------------------------
*/
#if !defined(ASSIMP_BUILD_NO_EXPORT) && !defined(ASSIMP_BUILD_NO_STL_EXPORTER)
#include "STLExporter.h"
#include <assimp/version.h>
#include <assimp/IOSystem.hpp>
#include <assimp/scene.h>
#include <assimp/Exporter.hpp>
#include <memory>
#include <assimp/Exceptional.h>
#include <assimp/ByteSwapper.h>
using namespace Assimp;
namespace Assimp {
// ------------------------------------------------------------------------------------------------
// Worker function for exporting a scene to Stereolithograpy. Prototyped and registered in Exporter.cpp
void ExportSceneSTL(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties )
{
bool exportPointClouds = pProperties->GetPropertyBool(AI_CONFIG_EXPORT_POINT_CLOUDS);
// invoke the exporter
STLExporter exporter(pFile, pScene, exportPointClouds );
if (exporter.mOutput.fail()) {
throw DeadlyExportError("output data creation failed. Most likely the file became too large: " + std::string(pFile));
}
// we're still here - export successfully completed. Write the file.
std::unique_ptr<IOStream> outfile (pIOSystem->Open(pFile,"wt"));
if(outfile == NULL) {
throw DeadlyExportError("could not open output .stl file: " + std::string(pFile));
}
outfile->Write( exporter.mOutput.str().c_str(), static_cast<size_t>(exporter.mOutput.tellp()),1);
}
void ExportSceneSTLBinary(const char* pFile,IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* pProperties )
{
bool exportPointClouds = pProperties->GetPropertyBool(AI_CONFIG_EXPORT_POINT_CLOUDS);
// invoke the exporter
STLExporter exporter(pFile, pScene, exportPointClouds, true);
if (exporter.mOutput.fail()) {
throw DeadlyExportError("output data creation failed. Most likely the file became too large: " + std::string(pFile));
}
// we're still here - export successfully completed. Write the file.
std::unique_ptr<IOStream> outfile (pIOSystem->Open(pFile,"wb"));
if(outfile == NULL) {
throw DeadlyExportError("could not open output .stl file: " + std::string(pFile));
}
outfile->Write( exporter.mOutput.str().c_str(), static_cast<size_t>(exporter.mOutput.tellp()),1);
}
} // end of namespace Assimp
static const char *SolidToken = "solid";
static const char *EndSolidToken = "endsolid";
// ------------------------------------------------------------------------------------------------
STLExporter::STLExporter(const char* _filename, const aiScene* pScene, bool exportPointClouds, bool binary)
: filename(_filename)
, endl("\n")
{
// make sure that all formatting happens using the standard, C locale and not the user's current locale
const std::locale& l = std::locale("C");
mOutput.imbue(l);
mOutput.precision(ASSIMP_AI_REAL_TEXT_PRECISION);
if (binary) {
char buf[80] = {0} ;
buf[0] = 'A'; buf[1] = 's'; buf[2] = 's'; buf[3] = 'i'; buf[4] = 'm'; buf[5] = 'p';
buf[6] = 'S'; buf[7] = 'c'; buf[8] = 'e'; buf[9] = 'n'; buf[10] = 'e';
mOutput.write(buf, 80);
unsigned int meshnum = 0;
for(unsigned int i = 0; i < pScene->mNumMeshes; ++i) {
for (unsigned int j = 0; j < pScene->mMeshes[i]->mNumFaces; ++j) {
meshnum++;
}
}
AI_SWAP4(meshnum);
mOutput.write((char *)&meshnum, 4);
if (exportPointClouds) {
throw DeadlyExportError("This functionality is not yet implemented for binary output.");
}
for(unsigned int i = 0; i < pScene->mNumMeshes; ++i) {
WriteMeshBinary(pScene->mMeshes[i]);
}
} else {
// Exporting only point clouds
if (exportPointClouds) {
WritePointCloud("Assimp_Pointcloud", pScene );
return;
}
// Export the assimp mesh
const std::string name = "AssimpScene";
mOutput << SolidToken << " " << name << endl;
for(unsigned int i = 0; i < pScene->mNumMeshes; ++i) {
WriteMesh(pScene->mMeshes[ i ]);
}
mOutput << EndSolidToken << name << endl;
}
}
// ------------------------------------------------------------------------------------------------
void STLExporter::WritePointCloud(const std::string &name, const aiScene* pScene) {
mOutput << " " << SolidToken << " " << name << endl;
aiVector3D nor;
mOutput << " facet normal " << nor.x << " " << nor.y << " " << nor.z << endl;
for (unsigned int i = 0; i < pScene->mNumMeshes; ++i) {
aiMesh *mesh = pScene->mMeshes[i];
if (nullptr == mesh) {
continue;
}
for (unsigned int a = 0; a < mesh->mNumVertices; ++a) {
const aiVector3D& v = mesh->mVertices[a];
mOutput << " vertex " << v.x << " " << v.y << " " << v.z << endl;
mOutput << " vertex " << v.x << " " << v.y << " " << v.z << endl;
mOutput << " vertex " << v.x << " " << v.y << " " << v.z << endl;
}
}
mOutput << EndSolidToken << " " << name << endl;
}
// ------------------------------------------------------------------------------------------------
void STLExporter::WriteMesh(const aiMesh* m)
{
for (unsigned int i = 0; i < m->mNumFaces; ++i) {
const aiFace& f = m->mFaces[i];
// we need per-face normals. We specified aiProcess_GenNormals as pre-requisite for this exporter,
// but nonetheless we have to expect per-vertex normals.
aiVector3D nor;
if (m->mNormals) {
for(unsigned int a = 0; a < f.mNumIndices; ++a) {
nor += m->mNormals[f.mIndices[a]];
}
nor.NormalizeSafe();
}
mOutput << " facet normal " << nor.x << " " << nor.y << " " << nor.z << endl;
mOutput << " outer loop" << endl;
for(unsigned int a = 0; a < f.mNumIndices; ++a) {
const aiVector3D& v = m->mVertices[f.mIndices[a]];
mOutput << " vertex " << v.x << " " << v.y << " " << v.z << endl;
}
mOutput << " endloop" << endl;
mOutput << " endfacet" << endl << endl;
}
}
void STLExporter::WriteMeshBinary(const aiMesh* m)
{
for (unsigned int i = 0; i < m->mNumFaces; ++i) {
const aiFace& f = m->mFaces[i];
// we need per-face normals. We specified aiProcess_GenNormals as pre-requisite for this exporter,
// but nonetheless we have to expect per-vertex normals.
aiVector3D nor;
if (m->mNormals) {
for(unsigned int a = 0; a < f.mNumIndices; ++a) {
nor += m->mNormals[f.mIndices[a]];
}
nor.Normalize();
}
// STL binary files use 4-byte floats. This may possibly cause loss of precision
// for clients using 8-byte doubles
float nx = (float) nor.x;
float ny = (float) nor.y;
float nz = (float) nor.z;
AI_SWAP4(nx); AI_SWAP4(ny); AI_SWAP4(nz);
mOutput.write((char *)&nx, 4); mOutput.write((char *)&ny, 4); mOutput.write((char *)&nz, 4);
for(unsigned int a = 0; a < f.mNumIndices; ++a) {
const aiVector3D& v = m->mVertices[f.mIndices[a]];
float vx = (float) v.x, vy = (float) v.y, vz = (float) v.z;
AI_SWAP4(vx); AI_SWAP4(vy); AI_SWAP4(vz);
mOutput.write((char *)&vx, 4); mOutput.write((char *)&vy, 4); mOutput.write((char *)&vz, 4);
}
char dummy[2] = {0};
mOutput.write(dummy, 2);
}
}
#endif

84
thirdparty/assimp/code/STL/STLExporter.h vendored
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@@ -1,84 +0,0 @@
/*
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 STLExporter.h
* Declares the exporter class to write a scene to a Stereolithography (STL) file
*/
#ifndef AI_STLEXPORTER_H_INC
#define AI_STLEXPORTER_H_INC
#include <sstream>
struct aiScene;
struct aiNode;
struct aiMesh;
namespace Assimp {
// ------------------------------------------------------------------------------------------------
/** Helper class to export a given scene to a STL file. */
// ------------------------------------------------------------------------------------------------
class STLExporter
{
public:
/// Constructor for a specific scene to export
STLExporter(const char* filename, const aiScene* pScene, bool exportPOintClouds, bool binary = false);
/// public stringstreams to write all output into
std::ostringstream mOutput;
private:
void WritePointCloud(const std::string &name, const aiScene* pScene);
void WriteMesh(const aiMesh* m);
void WriteMeshBinary(const aiMesh* m);
private:
const std::string filename;
// this endl() doesn't flush() the stream
const std::string endl;
};
}
#endif

582
thirdparty/assimp/code/STL/STLLoader.cpp vendored
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@@ -1,582 +0,0 @@
/*
---------------------------------------------------------------------------
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 STL importer class */
#ifndef ASSIMP_BUILD_NO_STL_IMPORTER
// internal headers
#include "STLLoader.h"
#include <assimp/ParsingUtils.h>
#include <assimp/fast_atof.h>
#include <memory>
#include <assimp/IOSystem.hpp>
#include <assimp/scene.h>
#include <assimp/DefaultLogger.hpp>
#include <assimp/importerdesc.h>
using namespace Assimp;
namespace {
static const aiImporterDesc desc = {
"Stereolithography (STL) Importer",
"",
"",
"",
aiImporterFlags_SupportTextFlavour | aiImporterFlags_SupportBinaryFlavour,
0,
0,
0,
0,
"stl"
};
// A valid binary STL buffer should consist of the following elements, in order:
// 1) 80 byte header
// 2) 4 byte face count
// 3) 50 bytes per face
static bool IsBinarySTL(const char* buffer, unsigned int fileSize) {
if( fileSize < 84 ) {
return false;
}
const char *facecount_pos = buffer + 80;
uint32_t faceCount( 0 );
::memcpy( &faceCount, facecount_pos, sizeof( uint32_t ) );
const uint32_t expectedBinaryFileSize = faceCount * 50 + 84;
return expectedBinaryFileSize == fileSize;
}
static const size_t BufferSize = 500;
static const char UnicodeBoundary = 127;
// An ascii STL buffer will begin with "solid NAME", where NAME is optional.
// Note: The "solid NAME" check is necessary, but not sufficient, to determine
// if the buffer is ASCII; a binary header could also begin with "solid NAME".
static bool IsAsciiSTL(const char* buffer, unsigned int fileSize) {
if (IsBinarySTL(buffer, fileSize))
return false;
const char* bufferEnd = buffer + fileSize;
if (!SkipSpaces(&buffer))
return false;
if (buffer + 5 >= bufferEnd)
return false;
bool isASCII( strncmp( buffer, "solid", 5 ) == 0 );
if( isASCII ) {
// A lot of importers are write solid even if the file is binary. So we have to check for ASCII-characters.
if( fileSize >= BufferSize) {
isASCII = true;
for( unsigned int i = 0; i < BufferSize; i++ ) {
if( buffer[ i ] > UnicodeBoundary) {
isASCII = false;
break;
}
}
}
}
return isASCII;
}
} // namespace
// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by Importer
STLImporter::STLImporter()
: mBuffer(),
fileSize(),
pScene()
{}
// ------------------------------------------------------------------------------------------------
// Destructor, private as well
STLImporter::~STLImporter()
{}
// ------------------------------------------------------------------------------------------------
// Returns whether the class can handle the format of the given file.
bool STLImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const
{
const std::string extension = GetExtension(pFile);
if( extension == "stl" ) {
return true;
} else if (!extension.length() || checkSig) {
if( !pIOHandler ) {
return true;
}
const char* tokens[] = {"STL","solid"};
return SearchFileHeaderForToken(pIOHandler,pFile,tokens,2);
}
return false;
}
// ------------------------------------------------------------------------------------------------
const aiImporterDesc* STLImporter::GetInfo () const {
return &desc;
}
void addFacesToMesh(aiMesh* pMesh)
{
pMesh->mFaces = new aiFace[pMesh->mNumFaces];
for (unsigned int i = 0, p = 0; i < pMesh->mNumFaces;++i) {
aiFace& face = pMesh->mFaces[i];
face.mIndices = new unsigned int[face.mNumIndices = 3];
for (unsigned int o = 0; o < 3;++o,++p) {
face.mIndices[o] = p;
}
}
}
// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure.
void STLImporter::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() == nullptr) {
throw DeadlyImportError( "Failed to open STL file " + pFile + ".");
}
fileSize = (unsigned int)file->FileSize();
// allocate storage and copy the contents of the file to a memory buffer
// (terminate it with zero)
std::vector<char> buffer2;
TextFileToBuffer(file.get(),buffer2);
this->pScene = pScene;
this->mBuffer = &buffer2[0];
// the default vertex color is light gray.
clrColorDefault.r = clrColorDefault.g = clrColorDefault.b = clrColorDefault.a = (ai_real) 0.6;
// allocate a single node
pScene->mRootNode = new aiNode();
bool bMatClr = false;
if (IsBinarySTL(mBuffer, fileSize)) {
bMatClr = LoadBinaryFile();
} else if (IsAsciiSTL(mBuffer, fileSize)) {
LoadASCIIFile( pScene->mRootNode );
} else {
throw DeadlyImportError( "Failed to determine STL storage representation for " + pFile + ".");
}
// create a single default material, using a white diffuse color for consistency with
// other geometric types (e.g., PLY).
aiMaterial* pcMat = new aiMaterial();
aiString s;
s.Set(AI_DEFAULT_MATERIAL_NAME);
pcMat->AddProperty(&s, AI_MATKEY_NAME);
aiColor4D clrDiffuse(ai_real(1.0),ai_real(1.0),ai_real(1.0),ai_real(1.0));
if (bMatClr) {
clrDiffuse = clrColorDefault;
}
pcMat->AddProperty(&clrDiffuse,1,AI_MATKEY_COLOR_DIFFUSE);
pcMat->AddProperty(&clrDiffuse,1,AI_MATKEY_COLOR_SPECULAR);
clrDiffuse = aiColor4D( ai_real(0.05), ai_real(0.05), ai_real(0.05), ai_real(1.0));
pcMat->AddProperty(&clrDiffuse,1,AI_MATKEY_COLOR_AMBIENT);
pScene->mNumMaterials = 1;
pScene->mMaterials = new aiMaterial*[1];
pScene->mMaterials[0] = pcMat;
mBuffer = nullptr;
}
// ------------------------------------------------------------------------------------------------
// Read an ASCII STL file
void STLImporter::LoadASCIIFile( aiNode *root ) {
std::vector<aiMesh*> meshes;
std::vector<aiNode*> nodes;
const char* sz = mBuffer;
const char* bufferEnd = mBuffer + fileSize;
std::vector<aiVector3D> positionBuffer;
std::vector<aiVector3D> normalBuffer;
// try to guess how many vertices we could have
// assume we'll need 160 bytes for each face
size_t sizeEstimate = std::max(1u, fileSize / 160u ) * 3;
positionBuffer.reserve(sizeEstimate);
normalBuffer.reserve(sizeEstimate);
while (IsAsciiSTL(sz, static_cast<unsigned int>(bufferEnd - sz))) {
std::vector<unsigned int> meshIndices;
aiMesh* pMesh = new aiMesh();
pMesh->mMaterialIndex = 0;
meshIndices.push_back((unsigned int) meshes.size() );
meshes.push_back(pMesh);
aiNode *node = new aiNode;
node->mParent = root;
nodes.push_back( node );
SkipSpaces(&sz);
ai_assert(!IsLineEnd(sz));
sz += 5; // skip the "solid"
SkipSpaces(&sz);
const char* szMe = sz;
while (!::IsSpaceOrNewLine(*sz)) {
sz++;
}
size_t temp;
// setup the name of the node
if ((temp = (size_t)(sz-szMe))) {
if (temp >= MAXLEN) {
throw DeadlyImportError( "STL: Node name too long" );
}
std::string name( szMe, temp );
node->mName.Set( name.c_str() );
pMesh->mName.Set( name.c_str() );
//pScene->mRootNode->mName.length = temp;
//memcpy(pScene->mRootNode->mName.data,szMe,temp);
//pScene->mRootNode->mName.data[temp] = '\0';
} else {
pScene->mRootNode->mName.Set("<STL_ASCII>");
}
unsigned int faceVertexCounter = 3;
for ( ;; ) {
// go to the next token
if(!SkipSpacesAndLineEnd(&sz))
{
// seems we're finished although there was no end marker
ASSIMP_LOG_WARN("STL: unexpected EOF. \'endsolid\' keyword was expected");
break;
}
// facet normal -0.13 -0.13 -0.98
if (!strncmp(sz,"facet",5) && IsSpaceOrNewLine(*(sz+5)) && *(sz + 5) != '\0') {
if (faceVertexCounter != 3) {
ASSIMP_LOG_WARN("STL: A new facet begins but the old is not yet complete");
}
faceVertexCounter = 0;
normalBuffer.push_back(aiVector3D());
aiVector3D* vn = &normalBuffer.back();
sz += 6;
SkipSpaces(&sz);
if (strncmp(sz,"normal",6)) {
ASSIMP_LOG_WARN("STL: a facet normal vector was expected but not found");
} else {
if (sz[6] == '\0') {
throw DeadlyImportError("STL: unexpected EOF while parsing facet");
}
sz += 7;
SkipSpaces(&sz);
sz = fast_atoreal_move<ai_real>(sz, (ai_real&)vn->x );
SkipSpaces(&sz);
sz = fast_atoreal_move<ai_real>(sz, (ai_real&)vn->y );
SkipSpaces(&sz);
sz = fast_atoreal_move<ai_real>(sz, (ai_real&)vn->z );
normalBuffer.push_back(*vn);
normalBuffer.push_back(*vn);
}
} else if (!strncmp(sz,"vertex",6) && ::IsSpaceOrNewLine(*(sz+6))) { // vertex 1.50000 1.50000 0.00000
if (faceVertexCounter >= 3) {
ASSIMP_LOG_ERROR("STL: a facet with more than 3 vertices has been found");
++sz;
} else {
if (sz[6] == '\0') {
throw DeadlyImportError("STL: unexpected EOF while parsing facet");
}
sz += 7;
SkipSpaces(&sz);
positionBuffer.push_back(aiVector3D());
aiVector3D* vn = &positionBuffer.back();
sz = fast_atoreal_move<ai_real>(sz, (ai_real&)vn->x );
SkipSpaces(&sz);
sz = fast_atoreal_move<ai_real>(sz, (ai_real&)vn->y );
SkipSpaces(&sz);
sz = fast_atoreal_move<ai_real>(sz, (ai_real&)vn->z );
faceVertexCounter++;
}
} else if (!::strncmp(sz,"endsolid",8)) {
do {
++sz;
} while (!::IsLineEnd(*sz));
SkipSpacesAndLineEnd(&sz);
// finished!
break;
} else { // else skip the whole identifier
do {
++sz;
} while (!::IsSpaceOrNewLine(*sz));
}
}
if (positionBuffer.empty()) {
pMesh->mNumFaces = 0;
ASSIMP_LOG_WARN("STL: mesh is empty or invalid; no data loaded");
}
if (positionBuffer.size() % 3 != 0) {
pMesh->mNumFaces = 0;
throw DeadlyImportError("STL: Invalid number of vertices");
}
if (normalBuffer.size() != positionBuffer.size()) {
pMesh->mNumFaces = 0;
throw DeadlyImportError("Normal buffer size does not match position buffer size");
}
// only process positionbuffer when filled, else exception when accessing with index operator
// see line 353: only warning is triggered
// see line 373(now): access to empty positionbuffer with index operator forced exception
if (!positionBuffer.empty()) {
pMesh->mNumFaces = static_cast<unsigned int>(positionBuffer.size() / 3);
pMesh->mNumVertices = static_cast<unsigned int>(positionBuffer.size());
pMesh->mVertices = new aiVector3D[pMesh->mNumVertices];
memcpy(pMesh->mVertices, &positionBuffer[0].x, pMesh->mNumVertices * sizeof(aiVector3D));
positionBuffer.clear();
}
// also only process normalBuffer when filled, else exception when accessing with index operator
if (!normalBuffer.empty()) {
pMesh->mNormals = new aiVector3D[pMesh->mNumVertices];
memcpy(pMesh->mNormals, &normalBuffer[0].x, pMesh->mNumVertices * sizeof(aiVector3D));
normalBuffer.clear();
}
// now copy faces
addFacesToMesh(pMesh);
// assign the meshes to the current node
pushMeshesToNode( meshIndices, node );
}
// now add the loaded meshes
pScene->mNumMeshes = (unsigned int)meshes.size();
pScene->mMeshes = new aiMesh*[pScene->mNumMeshes];
for (size_t i = 0; i < meshes.size(); i++) {
pScene->mMeshes[ i ] = meshes[i];
}
root->mNumChildren = (unsigned int) nodes.size();
root->mChildren = new aiNode*[ root->mNumChildren ];
for ( size_t i=0; i<nodes.size(); ++i ) {
root->mChildren[ i ] = nodes[ i ];
}
}
// ------------------------------------------------------------------------------------------------
// Read a binary STL file
bool STLImporter::LoadBinaryFile()
{
// allocate one mesh
pScene->mNumMeshes = 1;
pScene->mMeshes = new aiMesh*[1];
aiMesh* pMesh = pScene->mMeshes[0] = new aiMesh();
pMesh->mMaterialIndex = 0;
// skip the first 80 bytes
if (fileSize < 84) {
throw DeadlyImportError("STL: file is too small for the header");
}
bool bIsMaterialise = false;
// search for an occurrence of "COLOR=" in the header
const unsigned char* sz2 = (const unsigned char*)mBuffer;
const unsigned char* const szEnd = sz2+80;
while (sz2 < szEnd) {
if ('C' == *sz2++ && 'O' == *sz2++ && 'L' == *sz2++ &&
'O' == *sz2++ && 'R' == *sz2++ && '=' == *sz2++) {
// read the default vertex color for facets
bIsMaterialise = true;
ASSIMP_LOG_INFO("STL: Taking code path for Materialise files");
const ai_real invByte = (ai_real)1.0 / ( ai_real )255.0;
clrColorDefault.r = (*sz2++) * invByte;
clrColorDefault.g = (*sz2++) * invByte;
clrColorDefault.b = (*sz2++) * invByte;
clrColorDefault.a = (*sz2++) * invByte;
break;
}
}
const unsigned char* sz = (const unsigned char*)mBuffer + 80;
// now read the number of facets
pScene->mRootNode->mName.Set("<STL_BINARY>");
pMesh->mNumFaces = *((uint32_t*)sz);
sz += 4;
if (fileSize < 84 + pMesh->mNumFaces*50) {
throw DeadlyImportError("STL: file is too small to hold all facets");
}
if (!pMesh->mNumFaces) {
throw DeadlyImportError("STL: file is empty. There are no facets defined");
}
pMesh->mNumVertices = pMesh->mNumFaces*3;
aiVector3D *vp = pMesh->mVertices = new aiVector3D[pMesh->mNumVertices];
aiVector3D *vn = pMesh->mNormals = new aiVector3D[pMesh->mNumVertices];
typedef aiVector3t<float> aiVector3F;
aiVector3F* theVec;
aiVector3F theVec3F;
for ( unsigned int i = 0; i < pMesh->mNumFaces; ++i ) {
// NOTE: Blender sometimes writes empty normals ... this is not
// our fault ... the RemoveInvalidData helper step should fix that
// There's one normal for the face in the STL; use it three times
// for vertex normals
theVec = (aiVector3F*) sz;
::memcpy( &theVec3F, theVec, sizeof(aiVector3F) );
vn->x = theVec3F.x; vn->y = theVec3F.y; vn->z = theVec3F.z;
*(vn+1) = *vn;
*(vn+2) = *vn;
++theVec;
vn += 3;
// vertex 1
::memcpy( &theVec3F, theVec, sizeof(aiVector3F) );
vp->x = theVec3F.x; vp->y = theVec3F.y; vp->z = theVec3F.z;
++theVec;
++vp;
// vertex 2
::memcpy( &theVec3F, theVec, sizeof(aiVector3F) );
vp->x = theVec3F.x; vp->y = theVec3F.y; vp->z = theVec3F.z;
++theVec;
++vp;
// vertex 3
::memcpy( &theVec3F, theVec, sizeof(aiVector3F) );
vp->x = theVec3F.x; vp->y = theVec3F.y; vp->z = theVec3F.z;
++theVec;
++vp;
sz = (const unsigned char*) theVec;
uint16_t color = *((uint16_t*)sz);
sz += 2;
if (color & (1 << 15))
{
// seems we need to take the color
if (!pMesh->mColors[0])
{
pMesh->mColors[0] = new aiColor4D[pMesh->mNumVertices];
for (unsigned int i = 0; i <pMesh->mNumVertices;++i)
*pMesh->mColors[0]++ = this->clrColorDefault;
pMesh->mColors[0] -= pMesh->mNumVertices;
ASSIMP_LOG_INFO("STL: Mesh has vertex colors");
}
aiColor4D* clr = &pMesh->mColors[0][i*3];
clr->a = 1.0;
const ai_real invVal( (ai_real)1.0 / ( ai_real )31.0 );
if (bIsMaterialise) // this is reversed
{
clr->r = (color & 0x31u) *invVal;
clr->g = ((color & (0x31u<<5))>>5u) *invVal;
clr->b = ((color & (0x31u<<10))>>10u) *invVal;
}
else
{
clr->b = (color & 0x31u) *invVal;
clr->g = ((color & (0x31u<<5))>>5u) *invVal;
clr->r = ((color & (0x31u<<10))>>10u) *invVal;
}
// assign the color to all vertices of the face
*(clr+1) = *clr;
*(clr+2) = *clr;
}
}
// now copy faces
addFacesToMesh(pMesh);
aiNode* root = pScene->mRootNode;
// allocate one node
aiNode* node = new aiNode();
node->mParent = root;
root->mNumChildren = 1u;
root->mChildren = new aiNode*[root->mNumChildren];
root->mChildren[0] = node;
// add all created meshes to the single node
node->mNumMeshes = pScene->mNumMeshes;
node->mMeshes = new unsigned int[pScene->mNumMeshes];
for (unsigned int i = 0; i < pScene->mNumMeshes; i++)
node->mMeshes[i] = i;
if (bIsMaterialise && !pMesh->mColors[0])
{
// use the color as diffuse material color
return true;
}
return false;
}
void STLImporter::pushMeshesToNode( std::vector<unsigned int> &meshIndices, aiNode *node ) {
ai_assert( nullptr != node );
if ( meshIndices.empty() ) {
return;
}
node->mNumMeshes = static_cast<unsigned int>( meshIndices.size() );
node->mMeshes = new unsigned int[ meshIndices.size() ];
for ( size_t i=0; i<meshIndices.size(); ++i ) {
node->mMeshes[ i ] = meshIndices[ i ];
}
meshIndices.clear();
}
#endif // !! ASSIMP_BUILD_NO_STL_IMPORTER

125
thirdparty/assimp/code/STL/STLLoader.h vendored
View File

@@ -1,125 +0,0 @@
/*
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 STLLoader.h
* Declaration of the STL importer class.
*/
#ifndef AI_STLLOADER_H_INCLUDED
#define AI_STLLOADER_H_INCLUDED
#include <assimp/BaseImporter.h>
#include <assimp/types.h>
// Forward declarations
struct aiNode;
namespace Assimp {
// ---------------------------------------------------------------------------
/**
* @brief Importer class for the sterolithography STL file format.
*/
class STLImporter : public BaseImporter {
public:
/**
* @brief STLImporter, the class default constructor.
*/
STLImporter();
/**
* @brief The class destructor.
*/
~STLImporter();
/**
* @brief 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:
/**
* @brief Return importer meta information.
* See #BaseImporter::GetInfo for the details
*/
const aiImporterDesc* GetInfo () const;
/**
* @brief Imports the given file into the given scene structure.
* See BaseImporter::InternReadFile() for details
*/
void InternReadFile( const std::string& pFile, aiScene* pScene,
IOSystem* pIOHandler);
/**
* @brief Loads a binary .stl file
* @return true if the default vertex color must be used as material color
*/
bool LoadBinaryFile();
/**
* @brief Loads a ASCII text .stl file
*/
void LoadASCIIFile( aiNode *root );
void pushMeshesToNode( std::vector<unsigned int> &meshIndices, aiNode *node );
protected:
/** Buffer to hold the loaded file */
const char* mBuffer;
/** Size of the file, in bytes */
unsigned int fileSize;
/** Output scene */
aiScene* pScene;
/** Default vertex color */
aiColor4D clrColorDefault;
};
} // end of namespace Assimp
#endif // AI_3DSIMPORTER_H_IN