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/*************************************************************************
** TriangularPatch.h **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2015 Martin Gieseking <martin.gieseking@uos.de> **
** **
** 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 3 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, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#ifndef DVISVGM_TRIANGULARPATCH_H
#define DVISVGM_TRIANGULARPATCH_H
#include "Color.h"
#include "Pair.h"
#include "ShadingPatch.h"
class TriangularPatch : public ShadingPatch
{
public:
TriangularPatch ();
TriangularPatch (Color::ColorSpace cspace) : ShadingPatch(cspace) {}
TriangularPatch (const PointVec &points, const ColorVec &colors, Color::ColorSpace cspace, int edgeflag, TriangularPatch *patch);
int psShadingType() const {return 4;}
DPair valueAt (double u, double v) const;
Color colorAt (double u, double v) const;
Color averageColor() const;
void setPoints (const PointVec &points, int edgeflag, ShadingPatch *patch);
void setPoints (const DPair &p1, const DPair &p2, const DPair &p3);
void setColors (const ColorVec &colors, int edgeflag, ShadingPatch *patch);
void setColors (const Color &c1, const Color &c2, const Color &c3);
void approximate (int gridsize, bool overlap, double delta, Callback &listener) const;
void getBBox (BoundingBox &bbox) const;
void getBoundaryPath(GraphicPath<double> &path) const;
int numPoints (int edgeflag) const {return edgeflag == 0 ? 3 : 1;}
int numColors (int edgeflag) const {return edgeflag == 0 ? 3 : 1;}
protected:
Color averageColor (const Color &c1, const Color &c2, const Color &c3) const;
private:
DPair _points[3];
Color _colors[3];
};
class LatticeTriangularPatch : public TriangularPatch
{
public:
LatticeTriangularPatch (Color::ColorSpace cspace) : TriangularPatch(cspace) {}
int psShadingType() const {return 5;}
};
#endif
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