Perlin.h

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// MH  16 May 1998

#include "Exports.h"

class Vector;

#define LERP(t, a, b) ( a + t * (b - a) )

PLUGINEXPORT void Perturb( const Vector &p, Vector &delta );
PLUGINEXPORT float Noise3( const Vector & );

PLUGINEXPORT float Contrast( float, float );
PLUGINEXPORT float Brighten( float, float );

PLUGINEXPORT void InitPerlinNoise( void );
PLUGINEXPORT void FreePerlinNoise( void );

PLUGINEXPORT float FractalTurb( const Vector &p, int octaves );

PLUGINEXPORT float Noise3ForSampling( const Vector & );

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