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/*************************************************************************
** Bezier.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2022 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 BEZIER_HPP
#define BEZIER_HPP
#include <vector>
#include "BoundingBox.hpp"
#include "Pair.hpp"
class Matrix;
class Bezier {
public:
Bezier ();
Bezier (const DPair &p0, const DPair &p1, const DPair &p2);
Bezier (const DPair &p0, const DPair &p1, const DPair &p2, const DPair &p3);
Bezier (const Bezier &source, double t0, double t1);
void setPoints (const DPair &p0, const DPair &p1, const DPair &p2, const DPair &p3);
void reverse ();
DPair valueAt (double t) const;
DPair blossomValue (double u, double v, double w) const;
void subdivide (double t, Bezier *bezier1, Bezier *bezier2) const;
Bezier& transform (const Matrix &matrix);
int approximate (double delta, std::vector<DPair> &p, std::vector<double> *t=nullptr) const;
const DPair& point (int i) const {return _points[i];}
int reduceDegree (double delta, std::vector<DPair> &p) const;
BoundingBox getBBox () const;
protected:
int approximate (double delta, double t0, double t1, std::vector<DPair> &p, std::vector<double> *t) const;
private:
DPair _points[4];
};
#endif
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