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/**
* \file
* \brief Path intersection
*//*
* 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_PATH_INTERSECTION_H
#define LIB2GEOM_SEEN_PATH_INTERSECTION_H
#include <2geom/crossing.h>
#include <2geom/path.h>
#include <2geom/sweep-bounds.h>
namespace Geom {
int winding(Path const &path, Point const &p);
bool path_direction(Path const &p);
inline bool contains(Path const & p, Point const &i, bool evenodd = true) {
return (evenodd ? winding(p, i) % 2 : winding(p, i)) != 0;
}
template<typename T>
Crossings curve_sweep(Path const &a, Path const &b) {
T t;
Crossings ret;
std::vector<Rect> bounds_a = bounds(a), bounds_b = bounds(b);
std::vector<std::vector<unsigned> > ixs = sweep_bounds(bounds_a, bounds_b);
for(unsigned i = 0; i < a.size(); i++) {
for(std::vector<unsigned>::iterator jp = ixs[i].begin(); jp != ixs[i].end(); ++jp) {
Crossings cc = t.crossings(a[i], b[*jp]);
offset_crossings(cc, i, *jp);
ret.insert(ret.end(), cc.begin(), cc.end());
}
}
return ret;
}
Crossings pair_intersect(Curve const & A, Interval const &Ad,
Curve const & B, Interval const &Bd);
Crossings mono_intersect(Curve const & A, Interval const &Ad,
Curve const & B, Interval const &Bd);
struct SimpleCrosser : public Crosser<Path> {
Crossings crossings(Curve const &a, Curve const &b);
Crossings crossings(Path const &a, Path const &b) override { return curve_sweep<SimpleCrosser>(a, b); }
CrossingSet crossings(PathVector const &a, PathVector const &b) override { return Crosser<Path>::crossings(a, b); }
};
struct MonoCrosser : public Crosser<Path> {
Crossings crossings(Path const &a, Path const &b) override { return crossings(PathVector(a), PathVector(b))[0]; }
CrossingSet crossings(PathVector const &a, PathVector const &b) override;
};
typedef SimpleCrosser DefaultCrosser;
std::vector<double> path_mono_splits(Path const &p);
CrossingSet crossings_among(PathVector const & p);
Crossings self_crossings(Path const & a);
inline Crossings crossings(Curve const & a, Curve const & b) {
DefaultCrosser c = DefaultCrosser();
return c.crossings(a, b);
}
inline Crossings crossings(Path const & a, Path const & b) {
DefaultCrosser c = DefaultCrosser();
return c.crossings(a, b);
}
inline CrossingSet crossings(PathVector const & a, PathVector const & b) {
DefaultCrosser c = DefaultCrosser();
return c.crossings(a, b);
}
}
#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 :
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