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Added ExtractPolygon quad support function

This commit is contained in:
mtarini 2009-06-26 13:05:52 +00:00
parent 2c8ecf8180
commit 92e3bf554f
1 changed files with 34 additions and 3 deletions
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37
vcg/complex/trimesh/polygon_support.h
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@ -141,7 +141,38 @@ namespace vcg
}
}
};
} // end namespace vcg
}
static void ExtractPolygon(typename TriMeshType::FacePointer tfi, std::vector<typename TriMeshType::VertexPointer> &vs){
vs.clear();
// find a non tagged edge
int se = -1;
for(int i=0; i<3; i++) if (!( tfi->IsF(i))) { se = i; break;}
assert(se!=-1); // else, all faux edges!
// initialize a pos on the first non faux edge
typename TriMeshType::VertexPointer v0 = tfi->V(se);
vcg::face::JumpingPos<typename TriMeshType::FaceType> p;
p.F() = tfi;
p.E() = se;
p.V() = p.F()->V(p.F()->Next(se));
p.FlipE();
vs.push_back(p.F()->V(se));
int guard = 0;
do{
while(p.F()->IsF(p.E())) { p.FlipF(); p.FlipE(); p.F()->SetV(); if (guard++>10) break;}
if (guard++>10) break;
vs.push_back(p.F()->V(p.E()));
p.FlipV();
p.FlipE();
} while( p.V() != v0 );
}
}; // end of struct
}} // end namespace vcg::tri
#endif // __VCGLIB_TRI_CLIP