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/*****************************************************************************
** FILE IDENTIFICATION
**
** Name: sgp.h
** Purpose: Header file for Simple Graphics Package
** Author: Kevin Rosenberg
** Date Started: 1984
**
** This is part of the CTSim program
** Copyright (c) 1983-2001 Kevin Rosenberg
**
** $Id: transformmatrix.h 7061 2003-09-07 06:34:45Z kevin $
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License (version 2) as
** published by the Free Software Foundation.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
******************************************************************************/
#ifndef __H_TRANSFORMMATRIX
#define __H_TRANSFORMMATRIX
#include <iostream>
class TransformationMatrix2D {
public:
double mtx[3][3];
TransformationMatrix2D () {};
TransformationMatrix2D (double m[3][3]);
void setIdentity();
void setTranslate (double x, double y);
void setScale (double sx, double sy);
void setShear (double shrx, double shry);
void setRotate (double theta);
double determinant () const;
const TransformationMatrix2D invert () const;
void transformPoint (double *pX, double *pY) const;
void print (std::ostream& ostr) const;
friend const TransformationMatrix2D operator* (const TransformationMatrix2D& lhs, const TransformationMatrix2D& rhs);
};
const TransformationMatrix2D operator* (const TransformationMatrix2D& lhs, const TransformationMatrix2D& rhs);
#endif
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