/*
 * Matrix.h
 *
 * Copyright (C) 1999 Stephen F. White
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program (see the file "COPYING" for details); if 
 * not, write to the Free Software Foundation, Inc., 675 Mass Ave, 
 * Cambridge, MA 02139, USA.
 */

#ifndef _MATRIX_H
#define _MATRIX_H

#include "Vec3f.h"

class Matrix {
public:
		    Matrix();
		    Matrix(float mat[4][4]);

    Matrix	    operator*(const Matrix &m) const;
    Vec3f	    operator*(const Vec3f &v) const;

    operator	    float *() { return (float *) _mat; }
    operator	    const float *() const { return (const float *) _mat; }
    float	   &operator[](int index) { return *((float*)_mat+index); }
    void	    getValue(float mat[4][4]) const;

    Matrix	    invert() const;

    static Matrix   identity();
    void	    swapRows(int i, int j);

private:
    float	    _mat[4][4];
};

#endif // _MATRIX_H