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lammps/lib/poems/mat4x4.h
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mat4x4.h
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/*
*_________________________________________________________________________*
* POEMS: PARALLELIZABLE OPEN SOURCE EFFICIENT MULTIBODY SOFTWARE *
* DESCRIPTION: SEE READ-ME *
* FILE NAME: mat4x4.h *
* 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 *
*_________________________________________________________________________*/
#ifndef MAT4X4_H
#define MAT4X4_H
#include "virtualmatrix.h"
#include "matrix.h"
class Vect4;
class Mat4x4 : public VirtualMatrix {
double elements[4][4];
public:
Mat4x4();
~Mat4x4();
Mat4x4(const Mat4x4& A); // copy constructor
Mat4x4(const VirtualMatrix& A); // copy constructor
double& operator_2int (int i, int j); // array access
double Get_2int(int i, int j) const;
void Set_2int(int i, int j, double value);
double BasicGet_2int(int i, int j) const;
void BasicSet_2int(int i, int j, double value);
void BasicIncrement_2int(int i, int j, double value);
void Const(double value);
MatrixType GetType() const;
std::istream& ReadData(std::istream& c); // input
std::ostream& WriteData(std::ostream& c) const; // output
void AssignVM(const VirtualMatrix& A);
Mat4x4& operator=(const Mat4x4& A); // assignment operator
Mat4x4& operator=(const VirtualMatrix& A); // overloaded =
Mat4x4& operator*=(double b);
Mat4x4& Identity();
friend Mat4x4 T(const Mat4x4& A); // a wasteful transpose
friend Mat4x4 CrossMat(Vect4& a); // a wasteful cross matrix implementation
friend void FastLU(Mat4x4& A, Mat4x4& LU, int *indx);
friend void FastLUSubs(Mat4x4& LU, Matrix& B, Matrix& C, int *indx);
friend void FastMult(Mat4x4& A, Vect4& B, Vect4& C);
friend void FastTMult(Mat4x4& A, Vect4& B, Vect4& C);
friend void FastNegMult(Mat4x4& A, Vect4& B, Vect4& C);
friend void FastNegTMult(Mat4x4& A, Vect4& B, Vect4& C);
friend void FastMult(Mat4x4& A, Mat4x4& B, Mat4x4& C);
friend void FastMultT(Mat4x4& A, Mat4x4& B, Mat4x4& C);
friend void FastAssignT(Mat4x4& A, Mat4x4& C);
};
#endif
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