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Diffstat (limited to 'include/2geom/orphan-code/intersection-by-smashing.h')
| -rw-r--r-- | include/2geom/orphan-code/intersection-by-smashing.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/include/2geom/orphan-code/intersection-by-smashing.h b/include/2geom/orphan-code/intersection-by-smashing.h new file mode 100644 index 0000000..996ec99 --- /dev/null +++ b/include/2geom/orphan-code/intersection-by-smashing.h @@ -0,0 +1,78 @@ +/* + * Diffeomorphism-based intersector: given two curves + * M(t)=(x(t),y(t)) and N(u)=(X(u),Y(u)) + * and supposing M is a graph over the x-axis, we compute y(x) and the + * transformation: + * X <- X + * Y <- Y - y(X) + * smashes M on the x axis. The intersections are then given by the roots of: + * Y(u) - y(X(u)) = 0 + *//* + * Authors: + * J.-F. Barraud <jfbarraud at gmail.com> + * Copyright 2010 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 SEEN_LIB2GEOM_INTERSECTION_BY_SMASHING_H +#define SEEN_LIB2GEOM_INTERSECTION_BY_SMASHING_H + +#include <2geom/d2.h> +#include <2geom/interval.h> +#include <2geom/sbasis.h> +#include <2geom/sbasis-geometric.h> +#include <cstdlib> +#include <vector> +#include <algorithm> + + +namespace Geom{ + +struct SmashIntersection { + Rect times; + Rect bbox; +}; + +std::vector<SmashIntersection> smash_intersect( D2<SBasis> const &a, D2<SBasis> const &b, double tol); +std::vector<SmashIntersection> monotonic_smash_intersect( D2<SBasis> const &a, D2<SBasis> const &b, double tol); +//std::vector<Intersection> monotonic_smash_intersect( Curve const &a, double a_from, double a_to, +// Curve const &b, double b_from, double b_to, double tol); + +std::vector<Interval> monotonicSplit(D2<SBasis> const &p); + +} // end namespace Geom + +#endif // !SEEN_LIB2GEOM_INTERSECTION_BY_SMASHING_H + +/* + 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 : |