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git-svn-id: https://reactphysics3d.googlecode.com/svn/trunk@26 92aac97c-a6ce-11dd-a772-7fcde58d38e6
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chappuis.daniel
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/****************************************************************************
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* Copyright (C) 2009 Daniel Chappuis *
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****************************************************************************
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* This file is part of ReactPhysics3D. *
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* *
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* ReactPhysics3D is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* ReactPhysics3D is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with ReactPhysics3D. If not, see <http://www.gnu.org/licenses/>. *
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***************************************************************************/
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#ifndef MATRIX_H
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#define MATRIX_H
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// Libraries
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#include "exceptions.h"
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#include <stdexcept>
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#include <iostream>
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// ReactPhysics3D namespace
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namespace reactphysics3d {
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/* -------------------------------------------------------------------
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Class Matrix :
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This class represents a matrix.
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-------------------------------------------------------------------
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*/
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class Matrix {
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private :
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int nbRow; // Number of row in the matrix
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int nbColumn; // Number of colum in the matrix
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double** array; // Dynamic array that contains the values of the matrix
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public :
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Matrix(int nbRow, int nbColum) throw(std::invalid_argument); // Constructor of the class Matrix
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Matrix(const Matrix& matrix); // Copy constructor of the class Matrix
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virtual ~Matrix(); // Destructor of the class Matrix
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double getValue(int i, int j) const throw(std::invalid_argument); // Return a value in the matrix
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void setValue(int i, int j, double value) throw(std::invalid_argument); // Set a value in the matrix
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int getNbRow() const; // Return the number of row of the matrix
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int getNbColumn() const; // Return the number of column of the matrix
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Matrix getCofactor(int i, int j) const throw(std::invalid_argument); // Return the cofactor matrix by removing row i and column j
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Matrix getTranspose() const; // Return the transposed matrixs
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Matrix getInverse() const throw(MathematicsException); // Return the inverse of the matrix if there exists
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double getDeterminant() const throw(MathematicsException); // Return the determinant of the matrix
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double getTrace() const throw(MathematicsException); // Return the trace of a square matrix
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static Matrix identity(int dimension) throw(std::invalid_argument); // Return the identity matrix I of the given dimension
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void display() const; // TO DELETE
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// --- Overloaded operators --- //
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Matrix operator+(const Matrix& matrix2) const throw(MathematicsException); // Overloaded operator for addition
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Matrix operator-(const Matrix& matrix2) const throw(MathematicsException); // Overloaded operator for substraction
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Matrix operator*(double nb) const; // Overloaded operator for multiplication with a number
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Matrix operator*(const Matrix& matrix2) const throw(MathematicsException); // Overloaded operator for multiplication with a matrix
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Matrix& operator=(const Matrix& matrix2) throw(MathematicsException); // Overloaded operator for assignment
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bool operator==(const Matrix& matrix2) const throw(MathematicsException); // Overloaded operator for equality condition
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};
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// Function to get a value in the matrix (inline)
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inline double Matrix::getValue(int i, int j) const throw(std::invalid_argument) {
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if (0 <= i && i < nbRow && 0 <= j && j < nbColumn) {
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// get the value in the matrix
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return array[i][j];
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}
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else {
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// We Throw an out_of_range exception
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throw std::invalid_argument("Exception : The index i or j is outside the matrix size !");
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}
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}
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// Function to set a value in the matrix (inline)
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inline void Matrix::setValue(int i, int j, double value) throw(std::invalid_argument) {
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if (0 <= i && i < nbRow && 0 <= j && j < nbColumn) {
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// Set the value in the matrix
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this->array[i][j] = value;
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}
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else {
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// We Throw an out_of_range exception
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throw std::invalid_argument("Exception : The index i or j is outside the matrix size !");
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}
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}
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// Function that return the number of row of the matrix (inline)
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inline int Matrix::getNbRow() const {
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return nbRow;
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}
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// Function that return the number of colum of the matrix (inline)
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inline int Matrix::getNbColumn() const {
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return nbColumn;
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}
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// Overloaded operator for multiplication between a number and a Matrix (inline)
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inline Matrix operator*(double number, const Matrix& matrix) {
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// Return the result matrix
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return matrix * number;
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}
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} // End of the ReactPhysics3D namespace
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#endif
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