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Added Edge Uniform sampling function that takes samples uniformly only on the mesh edges by regularly subdividing them

This commit is contained in:
Paolo Cignoni 2009-01-14 15:56:07 +00:00
parent 1f992d7929
commit 2497e3d286
1 changed files with 35 additions and 8 deletions
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43
vcg/complex/trimesh/point_sampling.h
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@ -286,15 +286,9 @@ static void AllEdge(MetroMesh & m, VertexSampler &ps)
// Edge sampling.
typedef typename UpdateTopology<MetroMesh>::PEdge SimpleEdge;
std::vector< SimpleEdge > Edges;
UpdateTopology<MetroMesh>::FillEdgeVector(m,Edges);
typename std::vector< SimpleEdge >::iterator ei;
UpdateTopology<MetroMesh>::FillUniqueEdgeVector(m,Edges);
sort(Edges.begin(), Edges.end()); // Lo ordino per vertici
typename std::vector< SimpleEdge>::iterator newEnd = unique(Edges.begin(), Edges.end());
typename std::vector<SimpleEdge>::iterator ei;
//qDebug("Edges %i (unique %i) ",(int)Edges.size(), (int)(newEnd-Edges.begin()) );
Edges.resize(newEnd-Edges.begin());
for(ei=Edges.begin(); ei!=Edges.end(); ++ei)
{
Point3f interp(0,0,0);
@ -303,6 +297,39 @@ static void AllEdge(MetroMesh & m, VertexSampler &ps)
ps.AddFace(*(*ei).f,interp);
}
}
static void EdgeUniform(MetroMesh & m, VertexSampler &ps,int sampleNum)
{
// Edge sampling.
typedef typename UpdateTopology<MetroMesh>::PEdge SimpleEdge;
std::vector< SimpleEdge > Edges;
UpdateTopology<MetroMesh>::FillUniqueEdgeVector(m,Edges);
// First loop compute total edge lenght;
float edgeSum=0;
typename std::vector< SimpleEdge >::iterator ei;
for(ei=Edges.begin(); ei!=Edges.end(); ++ei)
edgeSum+=Distance((*ei).v[0]->P(),(*ei).v[1]->P());
qDebug("Edges %i edge sum %f",Edges.size(),edgeSum);
float sampleLen = edgeSum/sampleNum;
qDebug("EdgesSamples %i Sampling Len %f",sampleNum,sampleLen);
float rest=0;
for(ei=Edges.begin(); ei!=Edges.end(); ++ei)
{
float len = Distance((*ei).v[0]->P(),(*ei).v[1]->P());
float samplePerEdge = floor((len+rest)/sampleLen);
rest = (len+rest) - samplePerEdge * sampleLen;
float step = 1.0/(samplePerEdge+1);
for(int i=0;i<samplePerEdge;++i)
{
Point3f interp(0,0,0);
interp[ (*ei).z ]=step*(i+1);
interp[((*ei).z+1)%3]=1.0-step*(i+1);
ps.AddFace(*(*ei).f,interp);
}
}
}
/*
// sample edges.
typename std::vector<pvv>::iterator ei;