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changed edge mesh uniform resampling

This commit is contained in:
Luigi Malomo 2018-05-11 18:56:46 +02:00
parent 8ce27cfcf8
commit 578a777245
1 changed files with 30 additions and 2 deletions
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32
vcg/complex/algorithms/point_sampling.h
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@ -755,6 +755,19 @@ static void VertexUniform(MeshType & m, VertexSampler &ps, int sampleNum)
}
///
/// \brief The EdgeSamplingStrategy enum determines the sampling strategy for edge meshes.
/// Given a sampling radius 'r', and the total length of the edge mesh 'L',
/// the number of generated samples is: op(L/r) (+ 1 if the mesh is not a loop)
/// where op is (floor | round | ceil)
///
enum EdgeSamplingStrategy
{
Floor = 0,
Round,
Ceil,
};
/// Perform an uniform sampling over an EdgeMesh.
///
/// It assumes that the mesh is 1-manifold.
@ -762,7 +775,7 @@ static void VertexUniform(MeshType & m, VertexSampler &ps, int sampleNum)
/// For each component of length <L> we place on it floor(L/radius)+1 samples.
/// (if conservative argument is false we place ceil(L/radius)+1 samples)
///
static void EdgeMeshUniform(MeshType &m, VertexSampler &ps, float radius, bool conservative = true)
static void EdgeMeshUniform(MeshType &m, VertexSampler &ps, float radius, SurfaceSampling::EdgeSamplingStrategy strategy = 0)
{
tri::RequireEEAdjacency(m);
tri::RequireCompactness(m);
@ -845,7 +858,22 @@ static void EdgeMeshUniform(MeshType &m, VertexSampler &ps, float radius, bool c
VertexPointer startVertex = ep.V();
// Third loop actually performs the sampling.
int sampleNum = conservative ? floor(totalLen / radius) : ceil(totalLen / radius);
int sampleNum = -1;
{
double div = double(totalLen) / radius;
switch (strategy) {
case Round:
sampleNum = int(round(div));
break;
case Ceil:
sampleNum = int(ceil(div));
break;
default: // Floor
sampleNum = int(floor(div));
break;
};
}
assert(sampleNum >= 0);
ScalarType sampleDist = totalLen / sampleNum;
// printf("Found a chain of %f with %i samples every %f (%f)\n", totalLen, sampleNum, sampleDist, radius);