207d609b09b8568c888d0966e6a16b9b722680a5
1 /**
2 * \file geom.h
3 * \brief Various geometrical calculations
4 *
5 * Authors:
6 * Nathan Hurst <njh@mail.csse.monash.edu.au>
7 *
8 * Copyright (C) 1999-2002 authors
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it either under the terms of the GNU Lesser General Public
12 * License version 2.1 as published by the Free Software Foundation
13 * (the "LGPL") or, at your option, under the terms of the Mozilla
14 * Public License Version 1.1 (the "MPL"). If you do not alter this
15 * notice, a recipient may use your version of this file under either
16 * the MPL or the LGPL.
17 *
18 * You should have received a copy of the LGPL along with this library
19 * in the file COPYING-LGPL-2.1; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * You should have received a copy of the MPL along with this library
22 * in the file COPYING-MPL-1.1
23 *
24 * The contents of this file are subject to the Mozilla Public License
25 * Version 1.1 (the "License"); you may not use this file except in
26 * compliance with the License. You may obtain a copy of the License at
27 * http://www.mozilla.org/MPL/
28 *
29 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
30 * OF ANY KIND, either express or implied. See the LGPL or the MPL for
31 * the specific language governing rights and limitations.
32 *
33 */
34 #ifndef LIB2GEOM_SEEN_GEOM_H
35 #define LIB2GEOM_SEEN_GEOM_H
37 //TODO: move somewhere else
39 #include <vector>
40 #include <2geom/point.h>
42 namespace Geom {
44 enum IntersectorKind {
45 intersects = 0,
46 parallel,
47 coincident,
48 no_intersection
49 };
51 int
52 intersector_ccw(const Geom::Point& p0, const Geom::Point& p1,
53 const Geom::Point& p2);
55 /* intersectors */
57 IntersectorKind
58 line_intersection(Geom::Point const &n0, double const d0,
59 Geom::Point const &n1, double const d1,
60 Geom::Point &result);
62 IntersectorKind
63 segment_intersect(Geom::Point const &p00, Geom::Point const &p01,
64 Geom::Point const &p10, Geom::Point const &p11,
65 Geom::Point &result);
67 IntersectorKind
68 line_twopoint_intersect(Geom::Point const &p00, Geom::Point const &p01,
69 Geom::Point const &p10, Geom::Point const &p11,
70 Geom::Point &result);
72 int centroid(std::vector<Geom::Point> p, Geom::Point& centroid, double &area);
74 }
76 #endif
78 /*
79 Local Variables:
80 mode:c++
81 c-file-style:"stroustrup"
82 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
83 indent-tabs-mode:nil
84 fill-column:99
85 End:
86 */
87 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :