38 lines
744 B
C
38 lines
744 B
C
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/*
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* SimplexNoise.h
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*
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* Created on: 14.06.2013
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* Author: Felix
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*/
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#ifndef DG_SIMPLEXNOISE_H_
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#define DG_SIMPLEXNOISE_H_
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#include <array>
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#include <map>
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/**
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* Caching simplex noise generator.
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*
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* The actual simplex noise generator is simplexnoise1234.h/cpp
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* from http://staffwww.itn.liu.se/~stegu/aqsis/aqsis-newnoise/ . See
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* that implementation for more details.
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*/
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class SimplexNoise {
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public:
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SimplexNoise();
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float getNoise(int x, int y);
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private:
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float noise(float x, float y) const;
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float grad(int hash, float x, float y) const;
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int fastFloor(float f) const;
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private:
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std::array<unsigned char, 512> mPerm;
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std::map<int, std::map<int, float> > mCache;
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};
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#endif /* DG_SIMPLEXNOISE_H_ */
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