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lammps/lib/poems/mat6x6.cpp
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mat6x6.cpp
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/*
*_________________________________________________________________________*
* POEMS: PARALLELIZABLE OPEN SOURCE EFFICIENT MULTIBODY SOFTWARE *
* DESCRIPTION: SEE READ-ME *
* FILE NAME: mat6x6.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 "mat6x6.h"
#include <cstdlib>
using namespace std;
Mat6x6::Mat6x6(){
numrows = numcols = 6;
}
Mat6x6::~Mat6x6(){
}
Mat6x6::Mat6x6(const Mat6x6& A){
numrows = numcols = 6;
int i,j;
for(i=0;i<6;i++)
for(j=0;j<6;j++)
elements[i][j] = A.elements[i][j];
}
Mat6x6::Mat6x6(const VirtualMatrix& A){
numrows = numcols = 6;
// error check
if( (A.GetNumRows() != 6) || (A.GetNumCols() != 6) ){
cerr << "illegal matrix size" << endl;
exit(0);
}
for(int i=0;i<6;i++)
for(int j=0;j<6;j++)
elements[i][j] = A.BasicGet(i,j);
}
double& Mat6x6::operator_2int(int i, int j){ // array access
return elements[i-1][j-1];
}
double Mat6x6::Get_2int(int i, int j) const{
return elements[i-1][j-1];
}
void Mat6x6::Set_2int(int i, int j, double value){
elements[i-1][j-1] = value;
}
double Mat6x6::BasicGet_2int(int i, int j) const{
return elements[i][j];
}
void Mat6x6::BasicSet_2int(int i, int j, double value){
elements[i][j] = value;
}
void Mat6x6::BasicIncrement_2int(int i, int j, double value){
elements[i][j] += value;
}
void Mat6x6::Const(double value){
int i,j;
for(i=0;i<6;i++)
for(j=0;j<6;j++)
elements[i][j] = value;
}
MatrixType Mat6x6::GetType() const{
return MAT6X6;
}
istream& Mat6x6::ReadData(istream& c){ //input
for(int i=0;i<6;i++)
for(int j=0;j<6;j++)
c >> elements[i][j];
return c;
}
ostream& Mat6x6::WriteData(ostream& c) const{ //output
for(int i=0;i<6;i++)
for(int j=0;j<6;j++)
c << elements[i][j] << ' ';
return c;
}
void Mat6x6::AssignVM(const VirtualMatrix& A){
// error check
if( (A.GetNumRows() != 6) || (A.GetNumCols() != 6) ){
cerr << "illegal matrix size" << endl;
exit(0);
}
for(int i=0;i<6;i++)
for(int j=0;j<6;j++)
elements[i][j] = A.BasicGet(i,j);
}
Mat6x6& Mat6x6::operator=(const Mat6x6& A){ // assignment operator
int i,j;
for(i=0;i<6;i++)
for(j=0;j<6;j++)
elements[i][j] = A.elements[i][j];
return *this;
}
Mat6x6& Mat6x6::operator=(const VirtualMatrix& A){ // overloaded =
// error check
if( (A.GetNumRows() != 6) || (A.GetNumCols() != 6) ){
cerr << "illegal matrix size" << endl;
exit(0);
}
for(int i=0;i<6;i++)
for(int j=0;j<6;j++)
elements[i][j] = A.BasicGet(i,j);
return *this;
}
Mat6x6& Mat6x6::operator*=(double b){
int i,j;
for(i=0;i<6;i++)
for(j=0;j<6;j++)
elements[i][j] *= b;
return *this;
}
Mat6x6& Mat6x6::Identity(){
int i,j;
for(i=0;i<5;i++){
elements[i][i] = 1.0;
for(j=i+1;j<6;j++){
elements[i][j] = 0.0;
elements[j][i] = 0.0;
}
}
elements[i][i] = 1.0;
return *this;
}
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