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Added VertexBorderCorner sampling function (that returns all the vertices over the boundary and that are corners...

This commit is contained in:
Paolo Cignoni 2013-10-03 10:00:53 +00:00
parent 97f8b30adf
commit 41bced16bd
1 changed files with 34 additions and 1 deletions
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35
vcg/complex/algorithms/point_sampling.h
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@ -433,8 +433,41 @@ static void VertexUniform(MetroMesh & m, VertexSampler &ps, int sampleNum)
ps.AddVert(*vertVec[i]);
}
/// \brief Sample all the border corner vertices
///
/// It assumes that the border flag have been set over the mesh.
/// All the vertices on the border where the surface forms an angle smaller than the given threshold are sampled.
///
static void VertexBorderCorner(MetroMesh & m, VertexSampler &ps, float angleRad)
{
typename MetroMesh::template PerVertexAttributeHandle <float> angleSumH = tri::Allocator<MetroMesh>:: template GetPerVertexAttribute<float> (m);
for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi)
angleSumH[vi]=0;
for(FaceIterator fi=m.face.begin();fi!=m.face.end();++fi)
{
for(int i=0;i<3;++i)
{
angleSumH[fi->V(i)] += vcg::Angle(fi->P2(i) - fi->P0(i),fi->P1(i) - fi->P0(i));
}
}
for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi)
{
if(angleSumH[vi]<angleRad)
ps.AddVert(*vi);
}
tri::Allocator<MetroMesh>:: template DeletePerVertexAttribute<float> (m,angleSumH);
}
/// Sample all the crease vertices.
/// e.g. all the vertices where there are at least three non faux edges.
/// It assumes that the crease edges had been marked as non-faux edges
/// for example by using
/// tri::UpdateFlags<MeshType>::FaceFauxCrease(mesh,creaseAngleRad);
/// Then it chooses all the vertices where there are at least three non faux edges.
///
static void VertexCrease(MetroMesh & m, VertexSampler &ps)
{
typedef typename UpdateTopology<MetroMesh>::PEdge SimpleEdge;