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Diffstat (limited to '')
| -rw-r--r-- | include/2geom/solver.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/include/2geom/solver.h b/include/2geom/solver.h new file mode 100644 index 0000000..5b082cb --- /dev/null +++ b/include/2geom/solver.h @@ -0,0 +1,88 @@ +/** + * \file + * \brief Finding roots of Bernstein-Bezier polynomials + *//* + * Authors: + * ? <?@?.?> + * + * Copyright ?-? authors + * + * This library is free software; you can redistribute it and/or + * modify it either under the terms of the GNU Lesser General Public + * License version 2.1 as published by the Free Software Foundation + * (the "LGPL") or, at your option, under the terms of the Mozilla + * Public License Version 1.1 (the "MPL"). If you do not alter this + * notice, a recipient may use your version of this file under either + * the MPL or the LGPL. + * + * You should have received a copy of the LGPL along with this library + * in the file COPYING-LGPL-2.1; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * You should have received a copy of the MPL along with this library + * in the file COPYING-MPL-1.1 + * + * The contents of this file are subject to the Mozilla Public License + * Version 1.1 (the "License"); you may not use this file except in + * compliance with the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY + * OF ANY KIND, either express or implied. See the LGPL or the MPL for + * the specific language governing rights and limitations. + * + */ + +#ifndef LIB2GEOM_SEEN_SOLVER_H +#define LIB2GEOM_SEEN_SOLVER_H + +#include <2geom/point.h> +#include <2geom/sbasis.h> +#include <vector> + +namespace Geom { + + class Point; + class Bezier; + +unsigned +crossing_count(Geom::Point const *V, /* Control pts of Bezier curve */ + unsigned degree); /* Degree of Bezier curve */ +void +find_parametric_bezier_roots( + Geom::Point const *w, /* The control points */ + unsigned degree, /* The degree of the polynomial */ + std::vector<double> & solutions, /* RETURN candidate t-values */ + unsigned depth); /* The depth of the recursion */ + +unsigned +crossing_count(double const *V, /* Control pts of Bezier curve */ + unsigned degree, /* Degree of Bezier curve */ + double left_t, double right_t); + + +void +find_bernstein_roots( + double const *w, /* The control points */ + unsigned degree, /* The degree of the polynomial */ + std::vector<double> & solutions, /* RETURN candidate t-values */ + unsigned depth, /* The depth of the recursion */ + double left_t=0, double right_t=1, bool use_secant=true); + +}; + +void +find_bernstein_roots(std::vector<double> &solutions, /* RETURN candidate t-values */ + Geom::Bezier const& bz, + double left_t, double right_t); + +#endif +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : |