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////////////////////////////////////////////////////////////////////////////////////////////////////

#ifndef __PLANE_H__

#define __PLANE_H__

#include "compute_math.h"

class Plane

{

public:

    Plane();

    Plane(const Plane &rfOther);

    Plane(const float3 &rfP0, const float3 &rfP1, const float3 &rfP2);

    Plane(const float3 &rkNormal, float fConstant);

    Plane(const float3 &rkPoint, const float3 &rkNormal);

    Plane& operator= (const Plane& rkOther);

    float dotNormal(const float3 &rkNormal) const;

    int side(const float3 &rkPoint) const;

    float distance(const float3 &rkPoint) const;

    bool findIntersection(

        float3 &rfIntersection,

        const float3 &rkPoint,

        const float3 &rkDir,

        float fZeroEpsilon = 1e-06f) const;

    bool findIntersection(

        float &rfT, 

        const float3 &rkPoint, 

        const float3 &rkDir, 

        float fZeroEpsilon = 1e-06f) const;

    bool intersects(

        const float3 &rkPoint, 

        const float3 &rkDir, 

        float fZeroEpsilon = 1e-06f) const;

    const float3 &getNormal() const                { return m_kNormal; }

    float getConstant()                            { return m_fConstant; }

protected:

    float3 m_kNormal;

    float m_fConstant;

};

#endif