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Diffstat (limited to 'src/3rdparty/assimp/code/DXFLoader.cpp')
| -rw-r--r-- | src/3rdparty/assimp/code/DXFLoader.cpp | 919 |
1 files changed, 0 insertions, 919 deletions
diff --git a/src/3rdparty/assimp/code/DXFLoader.cpp b/src/3rdparty/assimp/code/DXFLoader.cpp deleted file mode 100644 index 1e932e509..000000000 --- a/src/3rdparty/assimp/code/DXFLoader.cpp +++ /dev/null @@ -1,919 +0,0 @@ -/* ---------------------------------------------------------------------------- -Open Asset Import Library (assimp) ---------------------------------------------------------------------------- - -Copyright (c) 2006-2017, 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 DXFLoader.cpp - * @brief Implementation of the DXF importer class - */ - - -#ifndef ASSIMP_BUILD_NO_DXF_IMPORTER - -#include "DXFLoader.h" -#include "ParsingUtils.h" -#include "ConvertToLHProcess.h" -#include "fast_atof.h" - -#include "DXFHelper.h" -#include <assimp/IOSystem.hpp> -#include <assimp/scene.h> -#include <assimp/importerdesc.h> - -#include <numeric> - -using namespace Assimp; - -// AutoCAD Binary DXF<CR><LF><SUB><NULL> -#define AI_DXF_BINARY_IDENT ("AutoCAD Binary DXF\r\n\x1a\0") -#define AI_DXF_BINARY_IDENT_LEN (24) - -// default vertex color that all uncolored vertices will receive -#define AI_DXF_DEFAULT_COLOR aiColor4D(0.6f,0.6f,0.6f,0.6f) - -// color indices for DXF - 16 are supported, the table is -// taken directly from the DXF spec. -static aiColor4D g_aclrDxfIndexColors[] = -{ - aiColor4D (0.6f, 0.6f, 0.6f, 1.0f), - aiColor4D (1.0f, 0.0f, 0.0f, 1.0f), // red - aiColor4D (0.0f, 1.0f, 0.0f, 1.0f), // green - aiColor4D (0.0f, 0.0f, 1.0f, 1.0f), // blue - aiColor4D (0.3f, 1.0f, 0.3f, 1.0f), // light green - aiColor4D (0.3f, 0.3f, 1.0f, 1.0f), // light blue - aiColor4D (1.0f, 0.3f, 0.3f, 1.0f), // light red - aiColor4D (1.0f, 0.0f, 1.0f, 1.0f), // pink - aiColor4D (1.0f, 0.6f, 0.0f, 1.0f), // orange - aiColor4D (0.6f, 0.3f, 0.0f, 1.0f), // dark orange - aiColor4D (1.0f, 1.0f, 0.0f, 1.0f), // yellow - aiColor4D (0.3f, 0.3f, 0.3f, 1.0f), // dark gray - aiColor4D (0.8f, 0.8f, 0.8f, 1.0f), // light gray - aiColor4D (0.0f, 00.f, 0.0f, 1.0f), // black - aiColor4D (1.0f, 1.0f, 1.0f, 1.0f), // white - aiColor4D (0.6f, 0.0f, 1.0f, 1.0f) // violet -}; -#define AI_DXF_NUM_INDEX_COLORS (sizeof(g_aclrDxfIndexColors)/sizeof(g_aclrDxfIndexColors[0])) -#define AI_DXF_ENTITIES_MAGIC_BLOCK "$ASSIMP_ENTITIES_MAGIC" - - -static const aiImporterDesc desc = { - "Drawing Interchange Format (DXF) Importer", - "", - "", - "", - aiImporterFlags_SupportTextFlavour | aiImporterFlags_LimitedSupport, - 0, - 0, - 0, - 0, - "dxf" -}; - -// ------------------------------------------------------------------------------------------------ -// Constructor to be privately used by Importer -DXFImporter::DXFImporter() -{} - -// ------------------------------------------------------------------------------------------------ -// Destructor, private as well -DXFImporter::~DXFImporter() -{} - -// ------------------------------------------------------------------------------------------------ -// Returns whether the class can handle the format of the given file. -bool DXFImporter::CanRead( const std::string& pFile, IOSystem* /*pIOHandler*/, bool /*checkSig*/) const -{ - return SimpleExtensionCheck(pFile,"dxf"); -} - -// ------------------------------------------------------------------------------------------------ -// Get a list of all supported file extensions -const aiImporterDesc* DXFImporter::GetInfo () const -{ - return &desc; -} - -// ------------------------------------------------------------------------------------------------ -// Imports the given file into the given scene structure. -void DXFImporter::InternReadFile( const std::string& pFile, - aiScene* pScene, - IOSystem* pIOHandler) -{ - std::shared_ptr<IOStream> file = std::shared_ptr<IOStream>( pIOHandler->Open( pFile) ); - - // Check whether we can read the file - if( file.get() == NULL) { - throw DeadlyImportError( "Failed to open DXF file " + pFile + ""); - } - - // check whether this is a binaray DXF file - we can't read binary DXF files :-( - char buff[AI_DXF_BINARY_IDENT_LEN+1] = {0}; - file->Read(buff,AI_DXF_BINARY_IDENT_LEN,1); - - if (!strncmp(AI_DXF_BINARY_IDENT,buff,AI_DXF_BINARY_IDENT_LEN)) { - throw DeadlyImportError("DXF: Binary files are not supported at the moment"); - } - - // DXF files can grow very large, so read them via the StreamReader, - // which will choose a suitable strategy. - file->Seek(0,aiOrigin_SET); - StreamReaderLE stream( file ); - - DXF::LineReader reader (stream); - DXF::FileData output; - - // now get all lines of the file and process top-level sections - bool eof = false; - while(!reader.End()) { - - // blocks table - these 'build blocks' are later (in ENTITIES) - // referenced an included via INSERT statements. - if (reader.Is(2,"BLOCKS")) { - ParseBlocks(reader,output); - continue; - } - - // primary entity table - if (reader.Is(2,"ENTITIES")) { - ParseEntities(reader,output); - continue; - } - - // skip unneeded sections entirely to avoid any problems with them - // altogether. - else if (reader.Is(2,"CLASSES") || reader.Is(2,"TABLES")) { - SkipSection(reader); - continue; - } - - else if (reader.Is(2,"HEADER")) { - ParseHeader(reader,output); - continue; - } - - // comments - else if (reader.Is(999)) { - DefaultLogger::get()->info("DXF Comment: " + reader.Value()); - } - - // don't read past the official EOF sign - else if (reader.Is(0,"EOF")) { - eof = true; - break; - } - - ++reader; - } - if (!eof) { - DefaultLogger::get()->warn("DXF: EOF reached, but did not encounter DXF EOF marker"); - } - - ConvertMeshes(pScene,output); - - // Now rotate the whole scene by 90 degrees around the x axis to convert from AutoCAD's to Assimp's coordinate system - pScene->mRootNode->mTransformation = aiMatrix4x4( - 1.f,0.f,0.f,0.f, - 0.f,0.f,1.f,0.f, - 0.f,-1.f,0.f,0.f, - 0.f,0.f,0.f,1.f) * pScene->mRootNode->mTransformation; -} - -// ------------------------------------------------------------------------------------------------ -void DXFImporter::ConvertMeshes(aiScene* pScene, DXF::FileData& output) -{ - // the process of resolving all the INSERT statements can grow the - // polycount excessively, so log the original number. - // XXX Option to import blocks as separate nodes? - if (!DefaultLogger::isNullLogger()) { - - unsigned int vcount = 0, icount = 0; - for (const DXF::Block& bl : output.blocks) { - for (std::shared_ptr<const DXF::PolyLine> pl : bl.lines) { - vcount += static_cast<unsigned int>(pl->positions.size()); - icount += static_cast<unsigned int>(pl->counts.size()); - } - } - - DefaultLogger::get()->debug((Formatter::format("DXF: Unexpanded polycount is "), - icount,", vertex count is ",vcount - )); - } - - if (! output.blocks.size() ) { - throw DeadlyImportError("DXF: no data blocks loaded"); - } - - DXF::Block* entities = 0; - - // index blocks by name - DXF::BlockMap blocks_by_name; - for (DXF::Block& bl : output.blocks) { - blocks_by_name[bl.name] = &bl; - if ( !entities && bl.name == AI_DXF_ENTITIES_MAGIC_BLOCK ) { - entities = &bl; - } - } - - if (!entities) { - throw DeadlyImportError("DXF: no ENTITIES data block loaded"); - } - - typedef std::map<std::string, unsigned int> LayerMap; - - LayerMap layers; - std::vector< std::vector< const DXF::PolyLine*> > corr; - - // now expand all block references in the primary ENTITIES block - // XXX this involves heavy memory copying, consider a faster solution for future versions. - ExpandBlockReferences(*entities,blocks_by_name); - - unsigned int cur = 0; - for (std::shared_ptr<const DXF::PolyLine> pl : entities->lines) { - if (pl->positions.size()) { - - std::map<std::string, unsigned int>::iterator it = layers.find(pl->layer); - if (it == layers.end()) { - ++pScene->mNumMeshes; - - layers[pl->layer] = cur++; - - std::vector< const DXF::PolyLine* > pv; - pv.push_back(&*pl); - - corr.push_back(pv); - } - else { - corr[(*it).second].push_back(&*pl); - } - } - } - - if (!pScene->mNumMeshes) { - throw DeadlyImportError("DXF: this file contains no 3d data"); - } - - pScene->mMeshes = new aiMesh*[ pScene->mNumMeshes ] (); - - for(const LayerMap::value_type& elem : layers){ - aiMesh* const mesh = pScene->mMeshes[elem.second] = new aiMesh(); - mesh->mName.Set(elem.first); - - unsigned int cvert = 0,cface = 0; - for(const DXF::PolyLine* pl : corr[elem.second]){ - // sum over all faces since we need to 'verbosify' them. - cvert += std::accumulate(pl->counts.begin(),pl->counts.end(),0); - cface += static_cast<unsigned int>(pl->counts.size()); - } - - aiVector3D* verts = mesh->mVertices = new aiVector3D[cvert]; - aiColor4D* colors = mesh->mColors[0] = new aiColor4D[cvert]; - aiFace* faces = mesh->mFaces = new aiFace[cface]; - - mesh->mNumVertices = cvert; - mesh->mNumFaces = cface; - - unsigned int prims = 0; - unsigned int overall_indices = 0; - for(const DXF::PolyLine* pl : corr[elem.second]){ - - std::vector<unsigned int>::const_iterator it = pl->indices.begin(); - for(unsigned int facenumv : pl->counts) { - aiFace& face = *faces++; - face.mIndices = new unsigned int[face.mNumIndices = facenumv]; - - for (unsigned int i = 0; i < facenumv; ++i) { - face.mIndices[i] = overall_indices++; - - ai_assert(pl->positions.size() == pl->colors.size()); - if (*it >= pl->positions.size()) { - throw DeadlyImportError("DXF: vertex index out of bounds"); - } - - *verts++ = pl->positions[*it]; - *colors++ = pl->colors[*it++]; - } - - // set primitive flags now, this saves the extra pass in ScenePreprocessor. - switch(face.mNumIndices) { - case 1: - prims |= aiPrimitiveType_POINT; - break; - case 2: - prims |= aiPrimitiveType_LINE; - break; - case 3: - prims |= aiPrimitiveType_TRIANGLE; - break; - default: - prims |= aiPrimitiveType_POLYGON; - break; - } - } - } - - mesh->mPrimitiveTypes = prims; - mesh->mMaterialIndex = 0; - } - - GenerateHierarchy(pScene,output); - GenerateMaterials(pScene,output); -} - - -// ------------------------------------------------------------------------------------------------ -void DXFImporter::ExpandBlockReferences(DXF::Block& bl,const DXF::BlockMap& blocks_by_name) -{ - for (const DXF::InsertBlock& insert : bl.insertions) { - - // first check if the referenced blocks exists ... - const DXF::BlockMap::const_iterator it = blocks_by_name.find(insert.name); - if (it == blocks_by_name.end()) { - DefaultLogger::get()->error((Formatter::format("DXF: Failed to resolve block reference: "), - insert.name,"; skipping" - )); - continue; - } - - // XXX this would be the place to implement recursive expansion if needed. - const DXF::Block& bl_src = *(*it).second; - - for (std::shared_ptr<const DXF::PolyLine> pl_in : bl_src.lines) { - std::shared_ptr<DXF::PolyLine> pl_out = std::shared_ptr<DXF::PolyLine>(new DXF::PolyLine(*pl_in)); - - if (bl_src.base.Length() || insert.scale.x!=1.f || insert.scale.y!=1.f || insert.scale.z!=1.f || insert.angle || insert.pos.Length()) { - // manual coordinate system transformation - // XXX order - aiMatrix4x4 trafo, tmp; - aiMatrix4x4::Translation(-bl_src.base,trafo); - trafo *= aiMatrix4x4::Scaling(insert.scale,tmp); - trafo *= aiMatrix4x4::Translation(insert.pos,tmp); - - // XXX rotation currently ignored - I didn't find an appropriate sample model. - if (insert.angle != 0.f) { - DefaultLogger::get()->warn("DXF: BLOCK rotation not currently implemented"); - } - - for (aiVector3D& v : pl_out->positions) { - v *= trafo; - } - } - - bl.lines.push_back(pl_out); - } - } -} - - -// ------------------------------------------------------------------------------------------------ -void DXFImporter::GenerateMaterials(aiScene* pScene, DXF::FileData& /*output*/) -{ - // generate an almost-white default material. Reason: - // the default vertex color is GREY, so we are - // already at Assimp's usual default color. - // generate a default material - aiMaterial* pcMat = new aiMaterial(); - aiString s; - s.Set(AI_DEFAULT_MATERIAL_NAME); - pcMat->AddProperty(&s, AI_MATKEY_NAME); - - aiColor4D clrDiffuse(0.9f,0.9f,0.9f,1.0f); - pcMat->AddProperty(&clrDiffuse,1,AI_MATKEY_COLOR_DIFFUSE); - - clrDiffuse = aiColor4D(1.0f,1.0f,1.0f,1.0f); - pcMat->AddProperty(&clrDiffuse,1,AI_MATKEY_COLOR_SPECULAR); - - clrDiffuse = aiColor4D(0.05f,0.05f,0.05f,1.0f); - pcMat->AddProperty(&clrDiffuse,1,AI_MATKEY_COLOR_AMBIENT); - - pScene->mNumMaterials = 1; - pScene->mMaterials = new aiMaterial*[1]; - pScene->mMaterials[0] = pcMat; -} - - -// ------------------------------------------------------------------------------------------------ -void DXFImporter::GenerateHierarchy(aiScene* pScene, DXF::FileData& /*output*/) -{ - // generate the output scene graph, which is just the root node with a single child for each layer. - pScene->mRootNode = new aiNode(); - pScene->mRootNode->mName.Set("<DXF_ROOT>"); - - if (1 == pScene->mNumMeshes) { - pScene->mRootNode->mMeshes = new unsigned int[ pScene->mRootNode->mNumMeshes = 1 ]; - pScene->mRootNode->mMeshes[0] = 0; - } - else - { - pScene->mRootNode->mChildren = new aiNode*[ pScene->mRootNode->mNumChildren = pScene->mNumMeshes ]; - for (unsigned int m = 0; m < pScene->mRootNode->mNumChildren;++m) { - aiNode* p = pScene->mRootNode->mChildren[m] = new aiNode(); - p->mName = pScene->mMeshes[m]->mName; - - p->mMeshes = new unsigned int[p->mNumMeshes = 1]; - p->mMeshes[0] = m; - p->mParent = pScene->mRootNode; - } - } -} - - -// ------------------------------------------------------------------------------------------------ -void DXFImporter::SkipSection(DXF::LineReader& reader) -{ - for( ;!reader.End() && !reader.Is(0,"ENDSEC"); reader++); -} - - -// ------------------------------------------------------------------------------------------------ -void DXFImporter::ParseHeader(DXF::LineReader& reader, DXF::FileData& /*output*/) -{ - for( ;!reader.End() && !reader.Is(0,"ENDSEC"); reader++); -} - - -// ------------------------------------------------------------------------------------------------ -void DXFImporter::ParseBlocks(DXF::LineReader& reader, DXF::FileData& output) -{ - while( !reader.End() && !reader.Is(0,"ENDSEC")) { - if (reader.Is(0,"BLOCK")) { - ParseBlock(++reader,output); - continue; - } - ++reader; - } - - DefaultLogger::get()->debug((Formatter::format("DXF: got "), - output.blocks.size()," entries in BLOCKS" - )); -} - - -// ------------------------------------------------------------------------------------------------ -void DXFImporter::ParseBlock(DXF::LineReader& reader, DXF::FileData& output) -{ - // push a new block onto the stack. - output.blocks.push_back( DXF::Block() ); - DXF::Block& block = output.blocks.back(); - - while( !reader.End() && !reader.Is(0,"ENDBLK")) { - - switch(reader.GroupCode()) { - case 2: - block.name = reader.Value(); - break; - - case 10: - block.base.x = reader.ValueAsFloat(); - break; - case 20: - block.base.y = reader.ValueAsFloat(); - break; - case 30: - block.base.z = reader.ValueAsFloat(); - break; - } - - if (reader.Is(0,"POLYLINE")) { - ParsePolyLine(++reader,output); - continue; - } - - // XXX is this a valid case? - if (reader.Is(0,"INSERT")) { - DefaultLogger::get()->warn("DXF: INSERT within a BLOCK not currently supported; skipping"); - for( ;!reader.End() && !reader.Is(0,"ENDBLK"); ++reader); - break; - } - - else if (reader.Is(0,"3DFACE") || reader.Is(0,"LINE") || reader.Is(0,"3DLINE")) { - //http://sourceforge.net/tracker/index.php?func=detail&aid=2970566&group_id=226462&atid=1067632 - Parse3DFace(++reader, output); - continue; - } - ++reader; - } -} - - -// ------------------------------------------------------------------------------------------------ -void DXFImporter::ParseEntities(DXF::LineReader& reader, DXF::FileData& output) -{ - // push a new block onto the stack. - output.blocks.push_back( DXF::Block() ); - DXF::Block& block = output.blocks.back(); - - block.name = AI_DXF_ENTITIES_MAGIC_BLOCK; - - while( !reader.End() && !reader.Is(0,"ENDSEC")) { - if (reader.Is(0,"POLYLINE")) { - ParsePolyLine(++reader,output); - continue; - } - - else if (reader.Is(0,"INSERT")) { - ParseInsertion(++reader,output); - continue; - } - - else if (reader.Is(0,"3DFACE") || reader.Is(0,"LINE") || reader.Is(0,"3DLINE")) { - //http://sourceforge.net/tracker/index.php?func=detail&aid=2970566&group_id=226462&atid=1067632 - Parse3DFace(++reader, output); - continue; - } - - ++reader; - } - - DefaultLogger::get()->debug((Formatter::format("DXF: got "), - block.lines.size()," polylines and ", block.insertions.size() ," inserted blocks in ENTITIES" - )); -} - - -void DXFImporter::ParseInsertion(DXF::LineReader& reader, DXF::FileData& output) -{ - output.blocks.back().insertions.push_back( DXF::InsertBlock() ); - DXF::InsertBlock& bl = output.blocks.back().insertions.back(); - - while( !reader.End() && !reader.Is(0)) { - - switch(reader.GroupCode()) - { - // name of referenced block - case 2: - bl.name = reader.Value(); - break; - - // translation - case 10: - bl.pos.x = reader.ValueAsFloat(); - break; - case 20: - bl.pos.y = reader.ValueAsFloat(); - break; - case 30: - bl.pos.z = reader.ValueAsFloat(); - break; - - // scaling - case 41: - bl.scale.x = reader.ValueAsFloat(); - break; - case 42: - bl.scale.y = reader.ValueAsFloat(); - break; - case 43: - bl.scale.z = reader.ValueAsFloat(); - break; - - // rotation angle - case 50: - bl.angle = reader.ValueAsFloat(); - break; - } - reader++; - } -} - -#define DXF_POLYLINE_FLAG_CLOSED 0x1 -#define DXF_POLYLINE_FLAG_3D_POLYLINE 0x8 -#define DXF_POLYLINE_FLAG_3D_POLYMESH 0x10 -#define DXF_POLYLINE_FLAG_POLYFACEMESH 0x40 - -// ------------------------------------------------------------------------------------------------ -void DXFImporter::ParsePolyLine(DXF::LineReader& reader, DXF::FileData& output) -{ - output.blocks.back().lines.push_back( std::shared_ptr<DXF::PolyLine>( new DXF::PolyLine() ) ); - DXF::PolyLine& line = *output.blocks.back().lines.back(); - - unsigned int iguess = 0, vguess = 0; - while( !reader.End() && !reader.Is(0,"ENDSEC")) { - - if (reader.Is(0,"VERTEX")) { - ParsePolyLineVertex(++reader,line); - if (reader.Is(0,"SEQEND")) { - break; - } - continue; - } - - switch(reader.GroupCode()) - { - // flags --- important that we know whether it is a - // polyface mesh or 'just' a line. - case 70: - if (!line.flags) { - line.flags = reader.ValueAsSignedInt(); - } - break; - - // optional number of vertices - case 71: - vguess = reader.ValueAsSignedInt(); - line.positions.reserve(vguess); - break; - - // optional number of faces - case 72: - iguess = reader.ValueAsSignedInt(); - line.indices.reserve(iguess); - break; - - // 8 specifies the layer on which this line is placed on - case 8: - line.layer = reader.Value(); - break; - } - - reader++; - } - - //if (!(line.flags & DXF_POLYLINE_FLAG_POLYFACEMESH)) { - // DefaultLogger::get()->warn((Formatter::format("DXF: polyline not currently supported: "),line.flags)); - // output.blocks.back().lines.pop_back(); - // return; - //} - - if (vguess && line.positions.size() != vguess) { - DefaultLogger::get()->warn((Formatter::format("DXF: unexpected vertex count in polymesh: "), - line.positions.size(),", expected ", vguess - )); - } - - if (line.flags & DXF_POLYLINE_FLAG_POLYFACEMESH ) { - if (line.positions.size() < 3 || line.indices.size() < 3) { - DefaultLogger::get()->warn("DXF: not enough vertices for polymesh; ignoring"); - output.blocks.back().lines.pop_back(); - return; - } - - // if these numbers are wrong, parsing might have gone wild. - // however, the docs state that applications are not required - // to set the 71 and 72 fields, respectively, to valid values. - // So just fire a warning. - if (iguess && line.counts.size() != iguess) { - DefaultLogger::get()->warn((Formatter::format("DXF: unexpected face count in polymesh: "), - line.counts.size(),", expected ", iguess - )); - } - } - else if (!line.indices.size() && !line.counts.size()) { - // a polyline - so there are no indices yet. - size_t guess = line.positions.size() + (line.flags & DXF_POLYLINE_FLAG_CLOSED ? 1 : 0); - line.indices.reserve(guess); - - line.counts.reserve(guess/2); - for (unsigned int i = 0; i < line.positions.size()/2; ++i) { - line.indices.push_back(i*2); - line.indices.push_back(i*2+1); - line.counts.push_back(2); - } - - // closed polyline? - if (line.flags & DXF_POLYLINE_FLAG_CLOSED) { - line.indices.push_back(static_cast<unsigned int>(line.positions.size()-1)); - line.indices.push_back(0); - line.counts.push_back(2); - } - } -} - -#define DXF_VERTEX_FLAG_PART_OF_POLYFACE 0x80 -#define DXF_VERTEX_FLAG_HAS_POSITIONS 0x40 - -// ------------------------------------------------------------------------------------------------ -void DXFImporter::ParsePolyLineVertex(DXF::LineReader& reader, DXF::PolyLine& line) -{ - unsigned int cnti = 0, flags = 0; - unsigned int indices[4]; - - aiVector3D out; - aiColor4D clr = AI_DXF_DEFAULT_COLOR; - - while( !reader.End() ) { - - if (reader.Is(0)) { // SEQEND or another VERTEX - break; - } - - switch (reader.GroupCode()) - { - case 8: - // layer to which the vertex belongs to - assume that - // this is always the layer the top-level polyline - // entity resides on as well. - if(reader.Value() != line.layer) { - DefaultLogger::get()->warn("DXF: expected vertex to be part of a polyface but the 0x128 flag isn't set"); - } - break; - - case 70: - flags = reader.ValueAsUnsignedInt(); - break; - - // VERTEX COORDINATES - case 10: out.x = reader.ValueAsFloat();break; - case 20: out.y = reader.ValueAsFloat();break; - case 30: out.z = reader.ValueAsFloat();break; - - // POLYFACE vertex indices - case 71: - case 72: - case 73: - case 74: - if (cnti == 4) { - DefaultLogger::get()->warn("DXF: more than 4 indices per face not supported; ignoring"); - break; - } - indices[cnti++] = reader.ValueAsUnsignedInt(); - break; - - // color - case 62: - clr = g_aclrDxfIndexColors[reader.ValueAsUnsignedInt() % AI_DXF_NUM_INDEX_COLORS]; - break; - }; - - reader++; - } - - if (line.flags & DXF_POLYLINE_FLAG_POLYFACEMESH && !(flags & DXF_VERTEX_FLAG_PART_OF_POLYFACE)) { - DefaultLogger::get()->warn("DXF: expected vertex to be part of a polyface but the 0x128 flag isn't set"); - } - - if (cnti) { - line.counts.push_back(cnti); - for (unsigned int i = 0; i < cnti; ++i) { - // IMPORTANT NOTE: POLYMESH indices are ONE-BASED - if (indices[i] == 0) { - DefaultLogger::get()->warn("DXF: invalid vertex index, indices are one-based."); - --line.counts.back(); - continue; - } - line.indices.push_back(indices[i]-1); - } - } - else { - line.positions.push_back(out); - line.colors.push_back(clr); - } -} - -// ------------------------------------------------------------------------------------------------ -void DXFImporter::Parse3DFace(DXF::LineReader& reader, DXF::FileData& output) -{ - // (note) this is also used for for parsing line entities, so we - // must handle the vertex_count == 2 case as well. - - output.blocks.back().lines.push_back( std::shared_ptr<DXF::PolyLine>( new DXF::PolyLine() ) ); - DXF::PolyLine& line = *output.blocks.back().lines.back(); - - aiVector3D vip[4]; - aiColor4D clr = AI_DXF_DEFAULT_COLOR; - - bool b[4] = {false,false,false,false}; - while( !reader.End() ) { - - // next entity with a groupcode == 0 is probably already the next vertex or polymesh entity - if (reader.GroupCode() == 0) { - break; - } - switch (reader.GroupCode()) - { - - // 8 specifies the layer - case 8: - line.layer = reader.Value(); - break; - - // x position of the first corner - case 10: vip[0].x = reader.ValueAsFloat(); - b[2] = true; - break; - - // y position of the first corner - case 20: vip[0].y = reader.ValueAsFloat(); - b[2] = true; - break; - - // z position of the first corner - case 30: vip[0].z = reader.ValueAsFloat(); - b[2] = true; - break; - - // x position of the second corner - case 11: vip[1].x = reader.ValueAsFloat(); - b[3] = true; - break; - - // y position of the second corner - case 21: vip[1].y = reader.ValueAsFloat(); - b[3] = true; - break; - - // z position of the second corner - case 31: vip[1].z = reader.ValueAsFloat(); - b[3] = true; - break; - - // x position of the third corner - case 12: vip[2].x = reader.ValueAsFloat(); - b[0] = true; - break; - - // y position of the third corner - case 22: vip[2].y = reader.ValueAsFloat(); - b[0] = true; - break; - - // z position of the third corner - case 32: vip[2].z = reader.ValueAsFloat(); - b[0] = true; - break; - - // x position of the fourth corner - case 13: vip[3].x = reader.ValueAsFloat(); - b[1] = true; - break; - - // y position of the fourth corner - case 23: vip[3].y = reader.ValueAsFloat(); - b[1] = true; - break; - - // z position of the fourth corner - case 33: vip[3].z = reader.ValueAsFloat(); - b[1] = true; - break; - - // color - case 62: - clr = g_aclrDxfIndexColors[reader.ValueAsUnsignedInt() % AI_DXF_NUM_INDEX_COLORS]; - break; - }; - - ++reader; - } - - // the fourth corner may even be identical to the third, - // in this case we treat it as if it didn't exist. - if (vip[3] == vip[2]) { - b[1] = false; - } - - // sanity checks to see if we got something meaningful - if ((b[1] && !b[0]) || !b[2] || !b[3]) { - DefaultLogger::get()->warn("DXF: unexpected vertex setup in 3DFACE/LINE/FACE entity; ignoring"); - output.blocks.back().lines.pop_back(); - return; - } - - const unsigned int cnt = (2+(b[0]?1:0)+(b[1]?1:0)); - line.counts.push_back(cnt); - - for (unsigned int i = 0; i < cnt; ++i) { - line.indices.push_back(static_cast<unsigned int>(line.positions.size())); - line.positions.push_back(vip[i]); - line.colors.push_back(clr); - } -} - -#endif // !! ASSIMP_BUILD_NO_DXF_IMPORTER - |