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- DXF: improve polyline (2D) reading. 

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@907 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
pull/1/head
aramis_acg 2011-02-23 14:24:14 +00:00
parent f7eca27c1b
commit bee6884864
1 changed files with 54 additions and 31 deletions
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85
code/DXFLoader.cpp
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@ -267,7 +267,7 @@ void DXFImporter::ConvertMeshes(aiScene* pScene, DXF::FileData& output)
throw DeadlyImportError("DXF: this file contains no 3d data"); throw DeadlyImportError("DXF: this file contains no 3d data");
} }
pScene->mMeshes = new aiMesh*[ pScene->mNumMeshes ]; pScene->mMeshes = new aiMesh*[ pScene->mNumMeshes ] ();
BOOST_FOREACH(const LayerMap::value_type& elem, layers){ BOOST_FOREACH(const LayerMap::value_type& elem, layers){
aiMesh* const mesh = pScene->mMeshes[elem.second] = new aiMesh(); aiMesh* const mesh = pScene->mMeshes[elem.second] = new aiMesh();
@ -590,10 +590,10 @@ void DXFImporter::ParseInsertion(DXF::LineReader& reader, DXF::FileData& output)
} }
} }
#define DXF_POLYLINE_FLAG_CLOSED 0x1
#define DXF_POLYLINE_FLAG_3D_POLYLINE 0x8 #define DXF_POLYLINE_FLAG_3D_POLYLINE 0x8
#define DXF_POLYLINE_FLAG_3D_POLYMESH 0x10 #define DXF_POLYLINE_FLAG_3D_POLYMESH 0x10
#define DXF_POLYLINE_FLAG_POLYFACEMESH 0x40 #define DXF_POLYLINE_FLAG_POLYFACEMESH 0x40
// ------------------------------------------------------------------------------------------------ // ------------------------------------------------------------------------------------------------
void DXFImporter::ParsePolyLine(DXF::LineReader& reader, DXF::FileData& output) void DXFImporter::ParsePolyLine(DXF::LineReader& reader, DXF::FileData& output)
@ -645,31 +645,54 @@ void DXFImporter::ParsePolyLine(DXF::LineReader& reader, DXF::FileData& output)
reader++; reader++;
} }
if (!(line.flags & DXF_POLYLINE_FLAG_POLYFACEMESH)) { //if (!(line.flags & DXF_POLYLINE_FLAG_POLYFACEMESH)) {
DefaultLogger::get()->warn((Formatter::format("DXF: polyline not currently supported: "),line.flags)); // DefaultLogger::get()->warn((Formatter::format("DXF: polyline not currently supported: "),line.flags));
output.blocks.back().lines.pop_back(); // output.blocks.back().lines.pop_back();
return; // return;
} //}
if (line.positions.size() < 3 || line.indices.size() < 3) { if (vguess && line.positions.size() != vguess) {
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 (line.positions.size() != vguess) {
DefaultLogger::get()->warn((Formatter::format("DXF: unexpected vertex count in polymesh: "), DefaultLogger::get()->warn((Formatter::format("DXF: unexpected vertex count in polymesh: "),
line.positions.size(),", expected ", vguess line.positions.size(),", expected ", vguess
)); ));
} }
if (line.counts.size() != iguess) {
DefaultLogger::get()->warn((Formatter::format("DXF: unexpected face count in polymesh: "), if (line.flags & DXF_POLYLINE_FLAG_POLYFACEMESH ) {
line.counts.size(),", expected ", iguess 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(line.positions.size()-1);
line.indices.push_back(0);
line.counts.push_back(2);
}
} }
} }
@ -732,15 +755,11 @@ void DXFImporter::ParsePolyLineVertex(DXF::LineReader& reader, DXF::PolyLine& li
reader++; reader++;
} }
if (!(flags & DXF_VERTEX_FLAG_PART_OF_POLYFACE)) { 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"); DefaultLogger::get()->warn("DXF: expected vertex to be part of a polyface but the 0x128 flag isn't set");
} }
if (flags & DXF_VERTEX_FLAG_HAS_POSITIONS) { if (cnti) {
line.positions.push_back(out);
line.colors.push_back(clr);
}
else {
line.counts.push_back(cnti); line.counts.push_back(cnti);
for (unsigned int i = 0; i < cnti; ++i) { for (unsigned int i = 0; i < cnti; ++i) {
// IMPORTANT NOTE: POLYMESH indices are ONE-BASED // IMPORTANT NOTE: POLYMESH indices are ONE-BASED
@ -752,6 +771,10 @@ void DXFImporter::ParsePolyLineVertex(DXF::LineReader& reader, DXF::PolyLine& li
line.indices.push_back(indices[i]-1); line.indices.push_back(indices[i]-1);
} }
} }
else {
line.positions.push_back(out);
line.colors.push_back(clr);
}
} }
// ------------------------------------------------------------------------------------------------ // ------------------------------------------------------------------------------------------------