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matrix.cpp
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Wed, Jul 10, 14:21

matrix.cpp
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/*
*_________________________________________________________________________*
* POEMS: PARALLELIZABLE OPEN SOURCE EFFICIENT MULTIBODY SOFTWARE *
* DESCRIPTION: SEE READ-ME *
* FILE NAME: matrix.cpp *
* AUTHORS: See Author List *
* GRANTS: See Grants List *
* COPYRIGHT: (C) 2005 by Authors as listed in Author's List *
* LICENSE: Please see License Agreement *
* DOWNLOAD: Free at www.rpi.edu/~anderk5 *
* ADMINISTRATOR: Prof. Kurt Anderson *
* Computational Dynamics Lab *
* Rensselaer Polytechnic Institute *
* 110 8th St. Troy NY 12180 *
* CONTACT: anderk5@rpi.edu *
*_________________________________________________________________________*/
#include "matrix.h"
#include <iostream>
#include <cstdlib>
using namespace std;
Matrix::Matrix(){
numrows = numcols = 0;
rows = 0;
elements = 0;
}
Matrix::~Matrix(){
delete [] rows;
delete [] elements;
}
Matrix::Matrix(const Matrix& A){
numrows = numcols = 0;
rows = 0;
elements = 0;
Dim(A.numrows,A.numcols);
for(int i=0;i<numrows*numcols;i++)
elements[i] = A.elements[i];
}
Matrix::Matrix(const VirtualMatrix& A){
numrows = numcols = 0;
rows = 0;
elements = 0;
Dim(A.GetNumRows(),A.GetNumCols());
for(int i=0;i<numrows;i++)
for(int j=0;j<numcols;j++)
rows[i][j] = A.BasicGet(i,j);
}
Matrix::Matrix(int m, int n){
numrows = numcols = 0;
rows = 0;
elements = 0;
this->Dim(m,n);
}
double& Matrix::operator_2int(int i, int j){
if((i>numrows) || (j>numcols) || (i*j==0)){
cerr << "matrix index exceeded in operator ()" << endl;
exit(1);
}
return rows[i-1][j-1];
}
double Matrix::Get_2int(int i, int j) const {
if((i>numrows) || (j>numcols) || (i*j==0)){
cerr << "matrix index exceeded in Get" << endl;
exit(1);
}
return rows[i-1][j-1];
}
void Matrix::Set_2int(int i, int j, double value){
if((i>numrows) || (j>numcols) || (i*j==0)){
cerr << "matrix index exceeded in Set" << endl;
exit(1);
}
rows[i-1][j-1] = value;
}
double Matrix::BasicGet_2int(int i, int j) const {
return rows[i][j];
}
void Matrix::BasicSet_2int(int i, int j, double value){
rows[i][j] = value;
}
void Matrix::BasicIncrement_2int(int i, int j, double value){
rows[i][j] += value;
}
void Matrix::Const(double value){
int num = numrows*numcols;
for(int i=0;i<num;i++) elements[i] = value;
}
MatrixType Matrix::GetType() const{
return MATRIX;
}
istream& Matrix::ReadData(istream& c){
int n,m;
c >> n >> m;
Dim(n,m);
for(int i=0;i<numrows;i++)
for(int j=0;j<numcols;j++){
c >> rows[i][j];
}
return c;
}
ostream& Matrix::WriteData(ostream& c) const{ //output
c << numrows << ' ' << numcols << ' ';
for(int i=0;i<numrows;i++)
for(int j=0;j<numcols;j++){
c << rows[i][j] << ' ';
}
return c;
}
Matrix& Matrix::Dim(int m, int n){ // allocate size
numrows = m;
numcols = n;
delete [] rows;
delete [] elements;
elements = new double[n*m];
rows = new double*[m];
for(int i=0;i<m;i++)
rows[i] = &elements[i*numcols];
return *this;
}
void Matrix::AssignVM(const VirtualMatrix& A){
Dim( A.GetNumRows(), A.GetNumCols() );
for(int i=0;i<numrows;i++)
for(int j=0;j<numcols;j++)
rows[i][j] = A.BasicGet(i,j);
}
Matrix& Matrix::operator=(const Matrix& A){
Dim(A.numrows,A.numcols);
for(int i=0;i<numrows*numcols;i++)
elements[i] = A.elements[i];
return *this;
}
Matrix& Matrix::operator=(const VirtualMatrix& A){
Dim( A.GetNumRows(), A.GetNumCols() );
for(int i=0;i<numrows;i++)
for(int j=0;j<numcols;j++)
rows[i][j] = A.BasicGet(i,j);
return *this;
}
Matrix& Matrix::operator*=(double b){
for(int i=0;i<numrows;i++)
for(int j=0;j<numcols;j++)
rows[i][j] *= b;
return *this;
}

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