PrecomputedRandom.h

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#ifndef G3D_PrecomputedRandom_h
#define G3D_PrecomputedRandom_h

#include "G3D/platform.h"
#include "G3D/Random.h"

namespace G3D {

class PrecomputedRandom : public Random {
public:
 class HemiUniformData {
 public:
 float cosHemiX;
 float cosHemiY;
 float cosHemiZ;
 float uniform;
 };

 class SphereBitsData {
 public:
 float sphereX;
 float sphereY;
 float sphereZ;
 uint32 bits;
 };

protected:

 const HemiUniformData* m_hemiUniform;
 const SphereBitsData* m_sphereBits;

 int m_modMask;

 int m_index;

 bool m_freeData;

public:

 /*
 \param dataSize Must be a power of 2
 \param data Will NOT be deleted by the destructor.
 */
 PrecomputedRandom(const HemiUniformData* data1, const SphereBitsData* data2, int dataSize, uint32 seed = 0xF018A4D2);

 PrecomputedRandom(int dataSize, uint32 seed = 0xF018A4D2);

 ~PrecomputedRandom();

 virtual uint32 bits();

 // integer is inherited

 virtual float uniform(float low, float high);

 virtual float uniform();

 // gaussian is inherited

 virtual void cosHemi(float& x, float& y, float& z);

 virtual void cosPowHemi(const float k, float& x, float& y, float& z);

 // hemi is inherited

 virtual void sphere(float& x, float& y, float& z);
};

}

#endif