70 lines
1.5 KiB
C++
70 lines
1.5 KiB
C++
/*
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* cgal_helper.h - Conversions between poly2d and CGAL
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*
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* Written 2012, 2015 by Werner Almesberger
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* Copyright 2012, 2015 by Werner Almesberger
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*/
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#ifndef CGAL_HELPER_H
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#define CGAL_HELPER_H
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/*
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* References:
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* http://www.cgal.org/Manual/latest/examples/Straight_skeleton_2/
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* Create_saop_from_polygon_with_holes_2.cpp
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* http://www.cgal.org/Manual/latest/examples/Straight_skeleton_2/print.h
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*/
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extern "C" {
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#include <stdbool.h>
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#include "poly2d.h"
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}
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#include <vector>
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#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
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#include <CGAL/Polygon_with_holes_2.h>
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typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
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typedef CGAL::Polygon_2<K> Polygon_2;
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static inline Polygon_2 p2d_to_P2(const struct p2d *p, bool ccw)
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{
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const struct v2d *v;
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Polygon_2 np;
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v = p->v;
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do {
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np.push_back(K::Point_2(v->x, v->y));
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v = v->next;
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}
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while (v != p->v);
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if (p2d_is_cw(p) == ccw)
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np.reverse_orientation();
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return np;
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}
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static inline struct p2d *P2_to_p2d(Polygon_2 p)
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{
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struct p2d *np;
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np = p2d_new();
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for (Polygon_2::Vertex_iterator vit = p.vertices_begin();
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vit != p.vertices_end(); ++vit)
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p2d_append(np, v2d_new(vit->x(), vit->y()));
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p2d_close(np);
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return np;
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}
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#endif /* !CGAL_HELPER_H */
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