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# use a more or less heuristic approach to fix the face winding order automatically. Overall things look much better now and normals are 100% right for most models. 

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@987 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
pull/1/head
aramis_acg 2011-05-07 20:53:51 +00:00
parent 5ac47b9873
commit f3bd6ac49b
1 changed files with 20 additions and 0 deletions
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20
code/IFCLoader.cpp
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@ -734,8 +734,25 @@ void ProcessExtrudedAreaSolid(const IFC::IfcExtrudedAreaSolid& solid, TempMesh&
aiMatrix4x4 trafo; aiMatrix4x4 trafo;
ConvertAxisPlacement(trafo, solid.Position,conv); ConvertAxisPlacement(trafo, solid.Position,conv);
aiVector3D vavg;
BOOST_FOREACH(aiVector3D& v, result.verts) { BOOST_FOREACH(aiVector3D& v, result.verts) {
v *= trafo; v *= trafo;
vavg += v;
}
// fixup face orientation.
vavg /= static_cast<float>( result.verts.size() );
size_t c = 0;
BOOST_FOREACH(unsigned int cnt, result.vertcnt) {
if (cnt>2){
const aiVector3D& thisvert = result.verts[c];
const aiVector3D normal((thisvert-result.verts[c+1])^(thisvert-result.verts[c+2]));
if (normal*(thisvert-vavg) < 0) {
std::reverse(result.verts.begin()+c,result.verts.begin()+cnt+c);
}
}
c += cnt;
} }
IFCImporter::LogDebug("generate mesh procedurally by extrusion (IfcExtrudedAreaSolid)"); IFCImporter::LogDebug("generate mesh procedurally by extrusion (IfcExtrudedAreaSolid)");
@ -1188,6 +1205,7 @@ void ProcessSpatialStructures(ConversionData& conv)
} }
} }
for(;range.first != range.second; ++range.first) { for(;range.first != range.second; ++range.first) {
const IFC::IfcSpatialStructureElement* const prod = (*range.first).second->ToPtr<IFC::IfcSpatialStructureElement>(); const IFC::IfcSpatialStructureElement* const prod = (*range.first).second->ToPtr<IFC::IfcSpatialStructureElement>();
if(!prod) { if(!prod) {
@ -1215,6 +1233,8 @@ void ProcessSpatialStructures(ConversionData& conv)
} }
} }
} }
IFCImporter::ThrowException("Failed to determine primary site element"); IFCImporter::ThrowException("Failed to determine primary site element");
} }