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Added PerlinColor function and ColorNoise function

This commit is contained in:
Paolo Cignoni 2009-06-16 08:57:24 +00:00
parent 625497e788
commit 168ea81ca8
1 changed files with 35 additions and 1 deletions
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36
vcg/complex/trimesh/update/color.h
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@ -67,7 +67,8 @@ Changed name from plural to singular (normals->normal)
#include <vcg/space/color4.h> #include <vcg/space/color4.h>
#include <vcg/math/histogram.h> #include <vcg/math/histogram.h>
#include <vcg/complex/trimesh/stat.h> #include <vcg/complex/trimesh/stat.h>
#include <vcg/math/perlin_noise.h>
#include <vcg/math/random_generator.h>
namespace vcg { namespace vcg {
namespace tri { namespace tri {
@ -856,6 +857,39 @@ static Color4b ColorWhiteBalance(Color4b c, Color4b unbalancedWhite)
255); 255);
} }
static void PerlinColor(MeshType& m, Box3f bbox, float freq, Point3i channelOffsets)
{
typedef typename MeshType::ScalarType ScalarType;
Point3<ScalarType> p;
for(VertexIterator vi = m.vert.begin(); vi!=m.vert.end(); ++vi)
{
if(!(*vi).IsD()){
p = bbox.GlobalToLocal(m.Tr * (*vi).P()); //actual vertex position scaled to bbox
(*vi).C() = Color4b( int(255*math::Perlin::Noise(channelOffsets[0]+p[0]*freq,channelOffsets[0]+p[1]*freq,channelOffsets[0]+p[2]*freq)),
int(255*math::Perlin::Noise(channelOffsets[1]+p[0]*freq,channelOffsets[1]+p[1]*freq,channelOffsets[1]+p[2]*freq)),
int(255*math::Perlin::Noise(channelOffsets[2]+p[0]*freq,channelOffsets[2]+p[1]*freq,channelOffsets[2]+p[2]*freq)),
255 );
}
}
}
static void ColorNoise(MeshType& m, int noiseBits)
{
if(noiseBits>8) noiseBits = 8;
if(noiseBits<1) return;
math::SubtractiveRingRNG randomGen = math::SubtractiveRingRNG(time(NULL));
for(VertexIterator vi = m.vert.begin(); vi!=m.vert.end(); ++vi)
{
if(!(*vi).IsD()){
(*vi).C()[0] = math::Clamp<int>((*vi).C()[0] + randomGen.generate(int(2*pow(2.0f,noiseBits))) - int(pow(2.0f,noiseBits)),0,255);
(*vi).C()[1] = math::Clamp<int>((*vi).C()[1] + randomGen.generate(int(2*pow(2.0f,noiseBits))) - int(pow(2.0f,noiseBits)),0,255);
(*vi).C()[2] = math::Clamp<int>((*vi).C()[2] + randomGen.generate(int(2*pow(2.0f,noiseBits))) - int(pow(2.0f,noiseBits)),0,255);
}
}
}
}; };
}// end namespace }// end namespace