Matrix.hpp

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/*
 *  Copyright (C) 2005 L2TI Universite Paris-13
 *
 * 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; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#ifndef _Matrix_hpp
#define _Matrix_hpp

#include<ImLib3D/Vect3D.hpp>


class Matrix
{
    float data[3][3];
public:
    float Cofactor(int i,int j) const;
public:
    Vect3Df operator*(const Vect3Df &) const;
    Matrix  operator*( const Matrix &other) const;
    void    operator*=(const Matrix &other){*this=(*this)*other;}
    Matrix  operator+( const Matrix &other) const;
    Matrix  operator-( const Matrix &other) const;
    void Inverse();
    void Transpose();
    float MaxElement();
    float  operator()(int i,int j) const {return data[i][j];}
    float &operator()(int i,int j)       {return data[i][j];}
    void SetToIdentity(){SetToDiagonal(1,1,1);}
    void SetToZero();
    void SetToDiagonal(float x,float y,float z)
    {
        SetToZero();
        data[0][0]=x;
        data[1][1]=y;
        data[2][2]=z;
    }
    bool operator==(const Matrix &other);
    bool operator!=(const Matrix &other){return !operator==(other);}
    void operator=(const Matrix &other);
    Matrix(const Matrix &other);
    Matrix(const float *initArray);
    Matrix(float m00,float m01,float m02,
           float m10,float m11,float m12,
           float m20,float m21,float m22);
    Matrix(){SetToZero();}
};

Matrix operator*(float s,const Matrix &matrix);
ostream& operator<< (ostream& s, const Matrix& matrix);

inline float Matrix::Cofactor(int i,int j) const
{
    return 
        data[(i+2)%3][(j+2)%3]*data[(i+1)%3][(j+1)%3]-
        data[(i+2)%3][(j+1)%3]*data[(i+1)%3][(j+2)%3] ;
}

#endif // _Matrix_hpp

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