61 lines
1.0 KiB
C++
61 lines
1.0 KiB
C++
//http://www.flipcode.com/archives/Perlin_Noise_Class.shtml
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#ifndef PERLIN_H_
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#define PERLIN_H_
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#include <stdlib.h>
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#define SAMPLE_SIZE 1024
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class Perlin
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{
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public:
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Perlin(int octaves,float freq,float amp,int seed);
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float Get(float x,float y)
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{
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float vec[2];
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vec[0] = x;
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vec[1] = y;
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return perlin_noise_2D(vec);
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};
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float Get(float x,float y, float z)
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{
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float vec[3];
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vec[0] = x;
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vec[1] = y;
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vec[2] = z;
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return perlin_noise_3D(vec);
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};
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private:
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void init_perlin(int n,float p);
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float perlin_noise_2D(float vec[2]);
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float perlin_noise_3D(float vec[3]);
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float noise1(float arg);
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float noise2(float vec[2]);
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float noise3(float vec[3]);
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void normalize2(float v[2]);
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void normalize3(float v[3]);
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void init(void);
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int mOctaves;
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float mFrequency;
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float mAmplitude;
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int mSeed;
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int p[SAMPLE_SIZE + SAMPLE_SIZE + 2];
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float g3[SAMPLE_SIZE + SAMPLE_SIZE + 2][3];
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float g2[SAMPLE_SIZE + SAMPLE_SIZE + 2][2];
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float g1[SAMPLE_SIZE + SAMPLE_SIZE + 2];
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bool mStart;
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};
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#endif
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