OgreVolumeSimplexNoise.h

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/*
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(Object-oriented Graphics Rendering Engine)
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*/
#ifndef __Ogre_Simplex_Noise_H__
#define __Ogre_Simplex_Noise_H__

#include "OgreVector3.h"

#include "OgreVolumePrerequisites.h"

namespace Ogre {
namespace Volume {

    class _OgreVolumeExport SimplexNoise
    {
    private:
        
        static Real F3;
        
        static Real G3;

        long mSeed;

        short perm[512];

        short permMod12[512];

        /* Gets a random long.
        @return
            A random long.
        */
        unsigned long random(void);
        
        inline Real dot(const Vector3 &g, Real x, Real y, Real z) const
        {
            return g.x * x + g.y * y + g.z * z;
        }
                
        void init(unsigned long definedSeed);

    public:

        SimplexNoise(void);

        SimplexNoise(unsigned long definedSeed);

        Real noise(Real xIn, Real yIn, Real zIn) const;
        
        long getSeed(void) const;

    };

}
}

#endif