First version of the SOurce SDK 2013

1 files changed, 35 insertions, 0 deletions

diff --git a/sp/src/public/mathlib/noise.h b/sp/src/public/mathlib/noise.h
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+++ b/sp/src/public/mathlib/noise.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//

+//

+// Purpose: 

+//

+//=====================================================================================//

+

+#ifndef NOISE_H

+#define NOISE_H

+

+#include <math.h>

+#include "basetypes.h"

+#include "mathlib/vector.h"

+#include "tier0/dbg.h"

+

+

+// The following code is the c-ification of Ken Perlin's new noise algorithm

+// "JAVA REFERENCE IMPLEMENTATION OF IMPROVED NOISE - COPYRIGHT 2002 KEN PERLIN"

+// as available here: http://mrl.nyu.edu/~perlin/noise/

+// it generates a single octave of noise in the -1..1 range

+// this should at some point probably replace SparseConvolutionNoise - jd

+float ImprovedPerlinNoise( Vector const &pnt );

+

+// get the noise value at a point. Output range is 0..1.

+float SparseConvolutionNoise( Vector const &pnt );

+

+// get the noise value at a point, passing a custom noise shaping function. The noise shaping

+// function should map the domain 0..1 to 0..1.

+float SparseConvolutionNoise(Vector const &pnt, float (*pNoiseShapeFunction)(float) );

+

+// returns a 1/f noise. more octaves take longer

+float FractalNoise( Vector const &pnt, int n_octaves );

+

+// returns a abs(f)*1/f noise i.e. turbulence

+float Turbulence( Vector const &pnt, int n_octaves );

+#endif // NOISE_H