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git-svn-id: svn://ultimatepp.org/upp/trunk@599 f0d560ea-af0d-0410-9eb7-867de7ffcac7
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cxl 2008-11-05 08:55:40 +00:00
parent a907bee20e
commit a8f5eddbab
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uppdev/CtrlLibTest/PerlinNoise.h Normal file
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#ifndef _CtrlLibTest_PerlinNoise_h_
#define _CtrlLibTest_PerlinNoise_h_
#include <Core/Core.h>
using namespace Upp;
struct PerlinNoise
{
public:
PerlinNoise() : octaves(2), persistence(0.5f) {}
PerlinNoise &Octaves(int _octaves) { octaves = minmax(_octaves, 2, 31); return *this; }
PerlinNoise &Persistence(float _pers) { persistence = _pers; return *this; }
virtual float Noise(int x, int y) const;
float SmoothNoise1(int x, int y) const;
float InterpolatedNoise1(float x, float y) const;
float CosineInterpolate(float a, float b, float x) const;
float PerlinNoise2D(int x, int y) const;
float PerlinNoise2D(float x, float y) const;
float PerlinNoise3D(int x, int y, int z, int offset = 0x151) const
{ return PerlinNoise2D(x + offset*z, y + offset*z); }
float PerlinNoise3D(float x, float y, int z, int offset = 0x151) const
{ return PerlinNoise2D(x + offset*z, y + offset*z); }
protected:
int octaves;
float persistence;
};
class PerlinNoiseCache : private PerlinNoise, public Moveable<PerlinNoiseCache>
{
public:
PerlinNoiseCache() { Clear(); }
void Cache(int cx, int cy);
PerlinNoiseCache &Octaves(int _octaves) { octaves = minmax(_octaves, 2, 31); return *this; }
PerlinNoiseCache &Persistence(float _pers) { persistence = max(0.0f, _pers); return *this; }
Image AsImage() const;
void Clear();
Size GetXY() const { return sz; }
float Get(int x, int y) const { ASSERT(~cache); return cache[(x % sz.cx) + sz.cx * (y % sz.cy)]; }
float Get(int x, int y, int z) const;
float Get(float x, float y, int z) const;
virtual float operator()(int x, int y, int z) const { return Get(x, y, z); }
virtual float operator()(float x, float y, int z) const { return Get(x, y, z); }
private:
Size sz;
Buffer<float> cache;
Buffer<float> noise;
void InitNoise();
void DeinitNoise() { noise.Clear(); }
virtual float Noise(int x, int y) const;
};
#endif