PerlinNoise
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/* -*-c++-*-
*
* OpenSceneGraph example, osgshaders.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/************************************************************************
* *
* Copyright (C) 2002 3Dlabs Inc. Ltd. *
* *
***********************************************************************/
/* Adapted from osgshaders example by Robert Osfield for use as part of osgUtil.*/
#ifndef PERLINENOISE_H
#define PERLINENOISE_H
#include <osg/Texture3D>
#include <osgUtil/Export>
namespace osgUtil
{
class OSGUTIL_EXPORT PerlinNoise
{
public:
PerlinNoise();
void SetNoiseFrequency(int frequency);
double noise1(double arg);
double noise2(double vec[2]);
double noise3(double vec[3]);
void normalize2(double vec[2]);
void normalize3(double vec[3]);
/*
In what follows "alpha" is the weight when the sum is formed.
Typically it is 2, As this approaches 1 the function is noisier.
"beta" is the harmonic scaling/spacing, typically 2.
*/
double PerlinNoise1D(double x,double alpha, double beta, int n);
double PerlinNoise2D(double x,double y,double alpha, double beta, int n);
double PerlinNoise3D(double x,double y,double z,double alpha, double beta, int n);
osg::Image* create3DNoiseImage(int texSize);
osg::Texture3D* create3DNoiseTexture(int texSize );
protected:
void initNoise(void);
enum { MAXB = 0x100 };
int p[MAXB + MAXB + 2];
double g3[MAXB + MAXB + 2][3];
double g2[MAXB + MAXB + 2][2];
double g1[MAXB + MAXB + 2];
int start;
int B;
int BM;
};
inline osg::Image* create3DNoiseImage(int texSize)
{
PerlinNoise pn;
return pn.create3DNoiseImage(texSize);
}
inline osg::Texture3D* create3DNoiseTexture(int texSize )
{
PerlinNoise pn;
return pn.create3DNoiseTexture(texSize);
}
}
#endif // PERLINENOISE_H
Texture3D
osgUtil::PerlinNoise
Definition PerlinNoise:40
osgUtil::PerlinNoise::noise2
double noise2(double vec[2])
osgUtil::PerlinNoise::MAXB
@ MAXB
Definition PerlinNoise:70
osgUtil::PerlinNoise::p
int p[MAXB+MAXB+2]
Definition PerlinNoise:72
osgUtil::PerlinNoise::noise1
double noise1(double arg)
osgUtil::PerlinNoise::initNoise
void initNoise(void)
osgUtil::PerlinNoise::SetNoiseFrequency
void SetNoiseFrequency(int frequency)
osgUtil::PerlinNoise::PerlinNoise2D
double PerlinNoise2D(double x, double y, double alpha, double beta, int n)
osgUtil::PerlinNoise::PerlinNoise
PerlinNoise()
osgUtil::PerlinNoise::PerlinNoise1D
double PerlinNoise1D(double x, double alpha, double beta, int n)
osgUtil::PerlinNoise::B
int B
Definition PerlinNoise:78
osgUtil::PerlinNoise::normalize2
void normalize2(double vec[2])
osgUtil::PerlinNoise::g1
double g1[MAXB+MAXB+2]
Definition PerlinNoise:75
osgUtil::PerlinNoise::g2
double g2[MAXB+MAXB+2][2]
Definition PerlinNoise:74
osgUtil::PerlinNoise::g3
double g3[MAXB+MAXB+2][3]
Definition PerlinNoise:73
osgUtil::PerlinNoise::create3DNoiseTexture
osg::Texture3D * create3DNoiseTexture(int texSize)
osgUtil::PerlinNoise::PerlinNoise3D
double PerlinNoise3D(double x, double y, double z, double alpha, double beta, int n)
osgUtil::PerlinNoise::normalize3
void normalize3(double vec[3])
osgUtil::PerlinNoise::create3DNoiseImage
osg::Image * create3DNoiseImage(int texSize)
osgUtil::PerlinNoise::start
int start
Definition PerlinNoise:77
osgUtil::PerlinNoise::BM
int BM
Definition PerlinNoise:79
osgUtil::PerlinNoise::noise3
double noise3(double vec[3])
osg::Image
Definition Image:179
osg::Texture3D
Definition Texture3D:25
osgUtil
Definition NodeVisitor:25
osgUtil::create3DNoiseTexture
osg::Texture3D * create3DNoiseTexture(int texSize)
Definition PerlinNoise:89
osgUtil::create3DNoiseImage
osg::Image * create3DNoiseImage(int texSize)
Definition PerlinNoise:83
Export
OSGUTIL_EXPORT
#define OSGUTIL_EXPORT
Definition osgUtil/Export:40