db5ff8ec4a
git-svn-id: https://reactphysics3d.googlecode.com/svn/trunk@392 92aac97c-a6ce-11dd-a772-7fcde58d38e6
130 lines
8.6 KiB
C++
130 lines
8.6 KiB
C++
/********************************************************************************
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* ReactPhysics3D physics library, http://code.google.com/p/reactphysics3d/ *
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* Copyright (c) 2010 Daniel Chappuis *
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*********************************************************************************
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy *
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* of this software and associated documentation files (the "Software"), to deal *
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* in the Software without restriction, including without limitation the rights *
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in *
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* all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, *
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN *
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* THE SOFTWARE. *
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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 "Matrix3x3.h"
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#include "Vector.h"
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#include <stdexcept>
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#include <iostream>
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// TODO : Replace the "int" by "unsigned int"
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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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unsigned int nbRow; // Number of row in the matrix
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unsigned 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(); // Constructor without argument
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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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Matrix(const Matrix3x3& matrix); // Conversion from Matrix3x3
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Matrix(const Vector& vector); // Conversion from Vector to 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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Matrix getSubMatrix(unsigned int i, unsigned int j,
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unsigned int nbRows, unsigned int nbColumns) const throw(std::invalid_argument); // Return a sub matrix of size of the current matrix
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Vector getVector() const;
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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 fillInSubMatrix(unsigned int i, unsigned int j, const Matrix& subMatrix); // Fill in a sub-matrix of the current matrix with another matrix
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void initWithValue(double value); // Initialize all the matrix with the given value
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void display() const; // TO DELETE
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void changeSize(uint nbRows, uint nbColumns);
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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 Vector& vector) const throw(MathematicsException); // Overloaded operator for multiplication with a vector
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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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