/************************************************************************* ** Bezier.hpp ** ** ** ** This file is part of dvisvgm -- a fast DVI to SVG converter ** ** Copyright (C) 2005-2019 Martin Gieseking ** ** ** ** 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 . ** *************************************************************************/ #ifndef BEZIER_HPP #define BEZIER_HPP #include #include "BoundingBox.hpp" #include "Pair.hpp" 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; int approximate (double delta, std::vector &p, std::vector *t=nullptr) const; const DPair& point (int i) const {return _points[i];} int reduceDegree (double delta, std::vector &p) const; void getBBox (BoundingBox &bbox) const; protected: int approximate (double delta, double t0, double t1, std::vector &p, std::vector *t) const; private: DPair _points[4]; }; #endif