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# IFC: fix potential crash during merging of polygon boundaries

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git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1016 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
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aramis_acg
2011-05-30 21:04:11 +00:00
parent 23ea1ac97d
commit 15565c4858
2 changed files with 7 additions and 5 deletions
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9
code/IFCLoader.cpp
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@@ -1047,17 +1047,20 @@ void MergePolygonBoundaries(TempMesh& result, const TempMesh& inmesh, size_t mas
// skip over extremely small boundaries - this is a workaround to fix cases
// in which the number of holes is so extremely large that the
// triangulation code fails.
#define IFC_VERTICAL_HOLE_SIZE_TRESHOLD 0.000001f
size_t vidx = 0, removed = 0, index = 0;
const float treshold = area_outer_polygon * 0.000001f;
const float treshold = area_outer_polygon * IFC_VERTICAL_HOLE_SIZE_TRESHOLD;
for(iit = begin; iit != end ;++index) {
const float sqlen = normals[index].SquareLength();
if (sqlen < treshold) {
std::vector<aiVector3D>::iterator inbase = in.begin()+vidx;
in.erase(inbase,inbase+*iit);
*iit++ = 0;
outer_polygon_start -= outer_polygon_start>vidx ? *iit : 0;
*iit++ = 0;
++removed;
IFCImporter::LogDebug("skip small hole below treshold");
}
else {
normals[index] /= sqrt(sqlen);