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/*
* surf - visualizing algebraic curves and algebraic surfaces
* Copyright (C) 1996-1997 Friedrich-Alexander-Universitaet
* Erlangen-Nuernberg
* 1997-2000 Johannes Gutenberg-Universitaet Mainz
* Authors: Stephan Endrass, Hans Huelf, Ruediger Oertel,
* Kai Schneider, Ralf Schmitt, Johannes Beigel
*
* 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.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef DRAWFUNCDATA_H
#define DRAWFUNCDATA_H
#include <assert.h>
//#include "polyarith.h"
#include "MultiVariatePolynom.h"
#include "WindowGeometry.h"
class Clip;
class Vector;
class Position;
class RationalHornerXY;
class HornergroupXY;
class HornergroupXYZ;
class float_buffer;
class RgbBuffer;
class DrawfuncData
{
private:
DrawfuncData(const DrawfuncData &);
void operator=(const DrawfuncData &);
public:
DrawfuncData( RgbBuffer *intensity, float_buffer *zbuff,
RationalHornerXY*, HornergroupXYZ*, HornergroupXY*,
Clip*, Position*,
double );
~DrawfuncData();
void SetBorders (int xmin, int xmax, int ymin, int ymax)
{
min[0]=xmin;
min[1]=ymin;
max[0]=xmax;
max[1]=ymax;
}
void setGeometry (const WindowGeometry &wg)
{
wingeo = wg;
Delta[VARIABLE_X] = wg.getDelta( VARIABLE_X );
Delta[VARIABLE_Y] = wg.getDelta( VARIABLE_Y );
};
// draw curves or cutlines working x/y direction
void PrintCurve( int );
// paint point if visible at user coordinates
void PaintPoint( double, double );
int DoRow( int, int, double, int, double, double, double* );
int DoPixel( int, int, double, double, int, double, double, double* );
private:
// set min and max pixel value
void GetBorders( int dir, int &vmin, int &vmax )
{
assert(dir==0||dir==1);
vmin = min[dir];
vmax = max[dir];
}
bool SetZbuffer (int x, int y, double val);
// {
// return mywindow->SetZbuffer(x,y,val);
// };
void SetCurvePixel (int x, int y, double val);
// {
// mywindow->SetCurvePixel(x,y,val);
// };
double ToUser (int dir, double pix)
{ return wingeo.pixelToUser(dir,pix);};
double ToPixel (int dir, double u)
{return wingeo.userToPixel(dir,u);};
double GetDelta (int dir)
{return wingeo.getDelta(dir);};
private:
RationalHornerXY* Plane; // rational equation for plane solved to z
HornergroupXYZ* Surface; // surface with derivates
HornergroupXY* Curve; // curve with orth derivative,
// xy and yx
Clip *clip; // clipping
// Mywindow *mywindow; // window
Position *position; // position : turn shift and scale
double PointWidth; // width of curve
double PointDiv; // 4*pointwidth
double MaxDist; // calculated from pointwidth
double Delta[2]; // distance between rows/cols
double WinSizeFactor; // for relative PointWidth (Size of Window)
WindowGeometry wingeo;
RgbBuffer *intensity;
float_buffer *zbuffer;
int min[2],max[2];
};
#endif
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