36 lines
1.3 KiB
C
36 lines
1.3 KiB
C
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//========= Copyright <20> 1996-2006, Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=====================================================================================//
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#ifndef NOISE_H
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#define NOISE_H
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#include <math.h>
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#include "basetypes.h"
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#include "mathlib/vector.h"
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#include "tier0/dbg.h"
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// The following code is the c-ification of Ken Perlin's new noise algorithm
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// "JAVA REFERENCE IMPLEMENTATION OF IMPROVED NOISE - COPYRIGHT 2002 KEN PERLIN"
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// as available here: http://mrl.nyu.edu/~perlin/noise/
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// it generates a single octave of noise in the -1..1 range
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// this should at some point probably replace SparseConvolutionNoise - jd
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float ImprovedPerlinNoise( Vector const &pnt );
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// get the noise value at a point. Output range is 0..1.
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float SparseConvolutionNoise( Vector const &pnt );
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// get the noise value at a point, passing a custom noise shaping function. The noise shaping
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// function should map the domain 0..1 to 0..1.
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float SparseConvolutionNoise(Vector const &pnt, float (*pNoiseShapeFunction)(float) );
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// returns a 1/f noise. more octaves take longer
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float FractalNoise( Vector const &pnt, int n_octaves );
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// returns a abs(f)*1/f noise i.e. turbulence
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float Turbulence( Vector const &pnt, int n_octaves );
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#endif // NOISE_H
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