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qssurface.h

/***************************************************************************
                                 qssurface.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 __QSSURFACE_H
#define __QSSURFACE_H

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

#include"qsplot.h"
#include"qsaxes.h"



class QSSurface : public QSPlot3D
   {
    Q_OBJECT
    Q_PROPERTY( int xGridStep READ xGridStep WRITE setXGridStep )
    Q_PROPERTY( int yGridStep READ yGridStep WRITE setYGridStep )
    
    public:
        enum Channels   {
              XVector=0,
                          YVector=1,
              ZData = 2,
              VData  =3 };
    QSSurface(QSAxes* parent, const char * name=0);
    virtual ~QSSurface();
    void setXGridStep( int step );
    void setYGridStep( int step );
    int xGridStep() const { return m_x_grid_step; }
    int yGridStep() const { return m_y_grid_step; }
    virtual QString posInfo( QSPt2f& pos );
    virtual QSPt2f legendItemSize( QSDrv *drv );
    virtual void drawLegendItem( const QSPt2f& pos, QSDrv *drv );
    virtual void loadStateFromStream( QDataStream& stream, QSObjectFactory *factory );
    virtual void saveStateToStream( QDataStream& stream, QSObjectFactory *factory );
        virtual ColumnType columnType( int channel, int column ) const;
    virtual QString channelVariable( int channel ) const;

   protected:
      virtual void dataChanged( int channel = -1 );
      virtual void allocRuntimeData();
      virtual void freeRuntimeData();
      virtual bool getAxisRange( QSAxis *axis, double& min, double& max );
      virtual bool start();
      virtual bool step();
      virtual void end();

    private:
    struct surface_runtime_data;
    struct surface_runtime_data *d;
        bool   m_minmax_z_valid;
    bool   m_minmax_v_valid;
        double m_max_z;
        double m_min_z;
    double m_min_v;
    double m_max_v;
    int m_x_grid_step;
    int m_y_grid_step;

        void init_loops();  
    void prepare_quarter();
    void draw_polygon( const QSPt3f pts[], QSPt3f *norm, const double *values=NULL, const bool *edges=NULL );
   };

#endif

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