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modify generatePoissonDisk taking into account spatial hash properties

This commit is contained in:
Massimiliano Corsini 2009-01-20 11:06:12 +00:00
parent f1ef838535
commit 226d111f9c
1 changed files with 5 additions and 20 deletions
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25
vcg/complex/trimesh/point_sampling.h
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@ -666,16 +666,13 @@ static CoordType RandomBox(vcg::Box3<ScalarType> box)
} }
// generate Poisson-disk sample using a set of pre-generated samples (with the Montecarlo algorithm) // generate Poisson-disk sample using a set of pre-generated samples (with the Montecarlo algorithm)
static bool generatePoissonDiskSample(Point3i *cell, MontecarloSHT & samplepool, vcg::Point3<ScalarType> & p) // It always return a point.
static vcg::Point3<ScalarType> generatePoissonDiskSample(Point3i *cell, MontecarloSHT & samplepool)
{ {
MontecarloSHTIterator cellBegin; MontecarloSHTIterator cellBegin;
MontecarloSHTIterator cellEnd; MontecarloSHTIterator cellEnd;
samplepool.Grid(*cell, cellBegin, cellEnd); samplepool.Grid(*cell, cellBegin, cellEnd);
return (*cellBegin)->P();
assert(cellBegin != cellEnd);
p = (*cellBegin)->P();
return true;
} }
// check the radius constrain // check the radius constrain
@ -795,8 +792,6 @@ static void Poissondisk(MetroMesh &origMesh, VertexSampler &ps, MetroMesh &monte
vcg::Box3<ScalarType> currentBox; vcg::Box3<ScalarType> currentBox;
vcg::Point3<ScalarType > s; // current sample vcg::Point3<ScalarType > s; // current sample
int level = 0; int level = 0;
bool validsample;
bool acceptedsample;
do do
{ {
@ -833,20 +828,10 @@ static void Poissondisk(MetroMesh &origMesh, VertexSampler &ps, MetroMesh &monte
currentCell = activeCells[i]; currentCell = activeCells[i];
// generate a sample chosen from the pre-generated one // generate a sample chosen from the pre-generated one
validsample = generatePoissonDiskSample(currentCell, montecarloSHT, s); s = generatePoissonDiskSample(currentCell, montecarloSHT);
samplesgenerated[level]++; samplesgenerated[level]++;
if (validsample) if (checkPoissonDisk(*ps.m, checkSHT, s, r))
{
// sample is valid
acceptedsample = checkPoissonDisk(*ps.m, checkSHT, s, r);
}
else
{
acceptedsample = false;
}
if (acceptedsample)
{ {
// add sample // add sample
tri::Allocator<MetroMesh>::AddVertices(supportMesh,1); tri::Allocator<MetroMesh>::AddVertices(supportMesh,1);