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qsprojection3d.h

/***************************************************************************
                                qsprojection3d.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 QSPROJECTION3D_H
#define QSPROJECTION3D_H

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


#include"qsprojection.h"

class QSProjection3D : public QSProjection {

    public:

        typedef double Matrix[4][4];
        Matrix M;
        Matrix P;
        Matrix T;
        QSPt3f lvector;
        QSPt3f dvector;
        QSPt3f eye;
       QSPt3f bmin;
       QSPt3f bmax;
        QSProjection3D();
       virtual ~QSProjection3D();
       static void matrix_to_stdout( const Matrix& m );
      static void matrixI( Matrix m );
      static void multiply( Matrix A, const Matrix B );
      static void inv( Matrix result, const Matrix m );
      static void copy( Matrix dst, const Matrix src );
      static void applyT( Matrix m, double dx, double dy, double dz );
      static void applyS( Matrix m, double sx, double sy, double sz );
      static void applyR( Matrix m, double alfay, double alfax, double alfaz = 0.0 );
      static void ortho( Matrix m, double l, double r, double b, double t, double n, double f );
      static void frustum( Matrix m, double l, double r, double b, double t, double n, double f );
      static void applyViewport( Matrix m, double x, double y, double w, double h, double n = 0.0, double f = 1.0 );
      static QSPt3f worldTransformation( const Matrix T, const QSPt3f &p );


      void setProjection( double  l, double  r, double  b, double  t, double  n, double  f, bool  perspective );
      void getProjection( double *l, double *r, double *b, double *t, double *n, double *f, bool *perspective ) const;
      void setViewport( double  x, double  y, double  w, double  h, double  n = 0.0, double  f = 0.0 );
      void getViewport( double *x, double *y, double *w, double *h, double *n, double *f  ) const;
      void fit( Matrix& S );
      virtual QSPt2f middle() const;
      virtual QSPt3f furthest() const;
      QSPt3f nearest() const;
      QSPt3f left() const;
      QSPt3f right() 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;

     private:

        bool m_perspective;

        double m_proj[6];
        double m_view[6];

       static void ludcmp( Matrix a, int indx[4], double *d );
       static void lubksb( Matrix a, int indx[4], double b[] );


     };

#endif

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