54 lines
1.2 KiB
C++
54 lines
1.2 KiB
C++
/**
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* =========================================================================
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* File : Noise.h
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* Project : 0 A.D.
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* Description : 2D and 3D seamless Perlin noise
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* =========================================================================
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*/
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// Based on http://www.cs.cmu.edu/~mzucker/code/perlin-noise-math-faq.html
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// and http://mrl.nyu.edu/~perlin/paper445.pdf.
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// Not optimized for speed yet.
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#ifndef INCLUDED_NOISE
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#define INCLUDED_NOISE
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#include "Vector2D.h"
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#include "Vector3D.h"
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#include "MathUtil.h"
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class Noise2D
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{
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/// Frequency in X and Y
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int freq;
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/// freq*freq random gradient vectors in the unit cube
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CVector2D_Maths** grads;
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public:
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Noise2D(int freq);
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~Noise2D();
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/// Evaluate the noise function at a given point
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float operator() (float x, float y);
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};
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class Noise3D
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{
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/// Frequency in X and Y
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int freq;
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/// Frequency in Z (vertical frequency)
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int vfreq;
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/// freq*freq*vfreq random gradient vectors in the unit cube
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CVector3D*** grads;
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public:
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Noise3D(int freq, int vfreq);
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~Noise3D();
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/// Evaluate the noise function at a given point
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float operator() (float x, float y, float z);
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};
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#endif
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