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Merge pull request #2044 from loebl/bug/keep_small_triangles_in_triangulation 

Keep small triangles in triangulation
pull/2045/head^2
Kim Kulling 2018-07-03 19:13:41 +02:00 committed by GitHub
parent eb21756eaa 1a0231f91e
commit 32abf9294a
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 20 additions and 16 deletions
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9
code/PostStepRegistry.cpp
View File

@ -164,9 +164,6 @@ void GetPostProcessingStepInstanceList(std::vector< BaseProcess* >& out)
#if (!defined ASSIMP_BUILD_NO_OPTIMIZEGRAPH_PROCESS)
out.push_back( new OptimizeGraphProcess());
#endif
#if (!defined ASSIMP_BUILD_NO_FINDDEGENERATES_PROCESS)
out.push_back( new FindDegeneratesProcess());
#endif
#ifndef ASSIMP_BUILD_NO_GENUVCOORDS_PROCESS
out.push_back( new ComputeUVMappingProcess());
#endif
@ -179,6 +176,12 @@ void GetPostProcessingStepInstanceList(std::vector< BaseProcess* >& out)
#if (!defined ASSIMP_BUILD_NO_TRIANGULATE_PROCESS)
out.push_back( new TriangulateProcess());
#endif
#if (!defined ASSIMP_BUILD_NO_FINDDEGENERATES_PROCESS)
//find degenerates should run after triangulation (to sort out small
//generated triangles) but before sort by p types (in case there are lines
//and points generated and inserted into a mesh)
out.push_back( new FindDegeneratesProcess());
#endif
#if (!defined ASSIMP_BUILD_NO_SORTBYPTYPE_PROCESS)
out.push_back( new SortByPTypeProcess());
#endif

27
code/TriangulateProcess.cpp
View File

@ -485,21 +485,22 @@ bool TriangulateProcess::TriangulateMesh( aiMesh* pMesh)
for(aiFace* f = last_face; f != curOut; ) {
unsigned int* i = f->mIndices;
// drop dumb 0-area triangles
if (std::fabs(GetArea2D(temp_verts[i[0]],temp_verts[i[1]],temp_verts[i[2]])) < 1e-5f) {
ASSIMP_LOG_DEBUG("Dropping triangle with area 0");
--curOut;
// drop dumb 0-area triangles - deactivated for now:
//FindDegenerates post processing step can do the same thing
//if (std::fabs(GetArea2D(temp_verts[i[0]],temp_verts[i[1]],temp_verts[i[2]])) < 1e-5f) {
// ASSIMP_LOG_DEBUG("Dropping triangle with area 0");
// --curOut;
delete[] f->mIndices;
f->mIndices = NULL;
// delete[] f->mIndices;
// f->mIndices = nullptr;
for(aiFace* ff = f; ff != curOut; ++ff) {
ff->mNumIndices = (ff+1)->mNumIndices;
ff->mIndices = (ff+1)->mIndices;
(ff+1)->mIndices = NULL;
}
continue;
}
// for(aiFace* ff = f; ff != curOut; ++ff) {
// ff->mNumIndices = (ff+1)->mNumIndices;
// ff->mIndices = (ff+1)->mIndices;
// (ff+1)->mIndices = nullptr;
// }
// continue;
//}
i[0] = idx[i[0]];
i[1] = idx[i[1]];