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restore deterministic poisson sampling

This commit is contained in:
alemuntoni 2021-08-23 16:24:23 +02:00
parent 95b376b648
commit aec8880e85
1 changed files with 18 additions and 4 deletions
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22
vcg/complex/algorithms/point_sampling.h
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@ -502,6 +502,18 @@ static unsigned int RandomInt(unsigned int i)
return (SamplingRandomGenerator().generate(i)); return (SamplingRandomGenerator().generate(i));
} }
class MarsenneTwisterURBG
{
public:
typedef unsigned int result_type;
MarsenneTwisterURBG(result_type max) : _max(max) {}
result_type min() const {return 0;}
result_type max() const {return _max;}
result_type operator()() {return SamplingRandomGenerator().generate(_max);}
private:
result_type _max;
};
// Returns a random number in the [0,1) real interval using the improved Marsenne-Twister method. // Returns a random number in the [0,1) real interval using the improved Marsenne-Twister method.
static double RandomDouble01() static double RandomDouble01()
{ {
@ -714,8 +726,9 @@ static void FillAndShuffleFacePointerVector(MeshType & m, std::vector<FacePointe
assert((int)faceVec.size()==m.fn); assert((int)faceVec.size()==m.fn);
//unsigned int (*p_myrandom)(unsigned int) = RandomInt; //unsigned int (*p_myrandom)(unsigned int) = RandomInt;
std::random_device rd; //std::random_device rd;
std::mt19937 g(rd()); //std::mt19937 g(rd());
MarsenneTwisterURBG g(faceVec.size());
std::shuffle(faceVec.begin(),faceVec.end(), g); std::shuffle(faceVec.begin(),faceVec.end(), g);
} }
static void FillAndShuffleVertexPointerVector(MeshType & m, std::vector<VertexPointer> &vertVec) static void FillAndShuffleVertexPointerVector(MeshType & m, std::vector<VertexPointer> &vertVec)
@ -726,8 +739,9 @@ static void FillAndShuffleVertexPointerVector(MeshType & m, std::vector<VertexPo
assert((int)vertVec.size()==m.vn); assert((int)vertVec.size()==m.vn);
//unsigned int (*p_myrandom)(unsigned int) = RandomInt; //unsigned int (*p_myrandom)(unsigned int) = RandomInt;
std::random_device rd; //std::random_device rd;
std::mt19937 g(rd()); //std::mt19937 g(rd());
MarsenneTwisterURBG g(vertVec.size());
std::shuffle(vertVec.begin(),vertVec.end(), g); std::shuffle(vertVec.begin(),vertVec.end(), g);
} }