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qsprojection2d.h

/***************************************************************************
                                qsprojection2d.h
                             -------------------                                         
    begin                : 01-January-2000
    copyright            : (C) 2000 by Kamil Dobkowski                         
    email                : kamildobk@poczta.onet.pl                                     
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   * 
 *                                                                         *
 ***************************************************************************/


#ifndef QSPROJECTION2D_H
#define QSPROJECTION2D_H

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include"qsprojection.h"

class QSProjection2D : public QSProjection  {

  public:
     typedef double Matrix[3][3];
     Matrix T;
     Matrix IT;
     QSProjection2D();
    virtual ~QSProjection2D();
    static void matrixI( Matrix m );
    static void multiply( Matrix A, Matrix B );
    static void copy( Matrix dst, const Matrix src );
    static void applyT( Matrix m, double dx, double dy );
    static void applyS( Matrix m, double sx, double sy );
    static void inv( Matrix result, const Matrix m );
    static void applyViewport( Matrix m, double x, double y, double w, double h );
    double world2DToCanvasX( double x ) const;
    double world2DToCanvasY( double y ) const;
    double world2DToCanvasZ( double z ) const;
    double canvasXToWorld2D( double x ) const;
    double canvasYToWorld2D( double y ) const;
    double canvasZToWorld2D( double z ) const;
    virtual QSPt2f world2DToCanvas( const QSPt2f& p ) const;
    virtual QSPt3f world2DToCanvas3( const QSPt2f& p ) const;
    virtual QSPt2f world3DToCanvas( const QSPt3f& p ) const;
    virtual QSPt3f world3DToCanvas3( const QSPt3f& p ) const;
    virtual QSPt3f canvas3ToWorld3D( const QSPt3f &p ) const;
    virtual QSPt2f worldTransformation( const Matrix m, const QSPt2f& p ) const;

    void setClipRect( double x1, double y1, double x2, double y2 );
    void getClipRect( double *x1, double *y1, double *x2, double *y2 ) const;

   private:
     // clip rectangle
     QSPt2f m_cmin;
     QSPt2f m_cmax;
  };


#endif

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