mupen64plus-oldsvn/rice_video/math.h

#ifndef RMATH_H
#define RMATH_H

/******************************************************************************
 * 4x4 matrix
 ******************************************************************************/

typedef struct _MATRIX {
    union {
        struct {
            float        _11, _12, _13, _14;
            float        _21, _22, _23, _24;
            float        _31, _32, _33, _34;
            float        _41, _42, _43, _44;
        };
        float m[4][4];
    };
} MATRIX;

typedef struct XMATRIX : public MATRIX {
public:
    XMATRIX();
    XMATRIX( const float * );
    XMATRIX( const MATRIX & );
    XMATRIX( float _11, float _12, float _13, float _14,
                float _21, float _22, float _23, float _24,
                float _31, float _32, float _33, float _34,
                float _41, float _42, float _43, float _44 );

    float& operator () ( uint Row, uint Col );
    float  operator () ( uint Row, uint Col ) const;

    operator float* ();
    operator const float* () const;

	// assignment operators
    XMATRIX& operator *= ( const XMATRIX & );
    XMATRIX& operator += ( const XMATRIX & );
    XMATRIX& operator -= ( const XMATRIX & );
    XMATRIX& operator *= ( float );
    XMATRIX& operator /= ( float );

	// unary operators
    XMATRIX operator + () const;
    XMATRIX operator - () const;

	// binary operators
    XMATRIX operator * ( const XMATRIX & ) const;
    XMATRIX operator + ( const XMATRIX & ) const;
    XMATRIX operator - ( const XMATRIX & ) const;
    XMATRIX operator * ( float ) const;
    XMATRIX operator / ( float ) const;
    friend XMATRIX operator * ( float, const XMATRIX & );
    bool operator == ( const XMATRIX & ) const;
    bool operator != ( const XMATRIX & ) const;
} XMATRIX, *LPXMATRIX;

/******************************************************************************
 * 3d vector
 ******************************************************************************/

typedef struct _VECTOR3
{
	float x;
	float y;
	float z;
} VECTOR3;

class XVECTOR3 : public VECTOR3
{
public:
	XVECTOR3();
	XVECTOR3( const float *f );
	XVECTOR3( const VECTOR3 &v );
	XVECTOR3( float _x, float _y, float _z );

	// casting
	inline operator float* ();
	inline operator const float* () const;

	// assignment operators
	inline XVECTOR3& operator += ( const XVECTOR3 &op );
	inline XVECTOR3& operator -= ( const XVECTOR3 &op );
	inline XVECTOR3& operator *= ( float op );
        inline XVECTOR3& operator /= ( float op );

	// unary operators
	inline XVECTOR3 operator + () const;
	inline XVECTOR3 operator - () const;

	// binary operators
        inline XVECTOR3 operator + ( const XVECTOR3 &op ) const;
	inline XVECTOR3 operator - ( const XVECTOR3 &op ) const;
	inline XVECTOR3 operator * ( float op ) const;
	inline XVECTOR3 operator / ( float op ) const;


	friend XVECTOR3 operator * ( float, const XVECTOR3& );

	inline bool operator == ( const XVECTOR3 &op ) const;
	inline bool operator != ( const XVECTOR3 &op ) const;
};

/******************************************************************************
 * 4d vector
 ******************************************************************************/

typedef struct _VECTOR4
{
	float x;
	float y;
	float z;
	float w;
} VECTOR4;

class XVECTOR4 : public VECTOR4
{
public:
	XVECTOR4();
	XVECTOR4( const float *f );
	XVECTOR4( const VECTOR4 &v );
	XVECTOR4( float _x, float _y, float _z, float _w );

	// casting
        inline operator float* ();
	inline operator const float* () const;

	// assignment operators
	inline XVECTOR4& operator += ( const XVECTOR4 &op );
	inline XVECTOR4& operator -= ( const XVECTOR4 &op );
	inline XVECTOR4& operator *= ( float op );
	inline XVECTOR4& operator /= ( float op );

	// unary operators
	inline XVECTOR4 operator + () const;
	inline XVECTOR4 operator - () const;

	// binary operators
	inline XVECTOR4 operator + ( const XVECTOR4 &op ) const;
	inline XVECTOR4 operator - ( const XVECTOR4 &op ) const;
	inline XVECTOR4 operator * ( float op ) const;
	inline XVECTOR4 operator / ( float op ) const;

	friend XVECTOR4 operator * ( float, const XVECTOR4& );

	inline bool operator == ( const XVECTOR4 &op ) const;
	inline bool operator != ( const XVECTOR4 &op ) const;
};

XVECTOR4 Vec3Transform(XVECTOR4 *pOut, const XVECTOR3 *pV, const XMATRIX *pM);

XMATRIX* MatrixTranspose(XMATRIX* pOut, CONST XMATRIX* pM);

#endif