1 /**
2 * \file
3 * \brief \todo brief description
4 *
5 * Authors:
6 * ? <?@?.?>
7 *
8 * Copyright ?-? 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 */
35 #include <vector>
36 #include <cassert>
38 #include <2geom/d2.h>
40 namespace Geom{
42 class Quad{
43 public:
44 Quad* children[4];
45 std::vector<int> data;
46 Quad() {
47 for(int i = 0; i < 4; i++)
48 children[i] = 0;
49 }
50 typedef std::vector<int>::iterator iterator;
51 Rect bounds(unsigned i, double x, double y, double d) {
52 double dd = d/2;
53 switch(i % 4) {
54 case 0:
55 return Rect(Interval(x, x+dd), Interval(y, y+dd));
56 case 1:
57 return Rect(Interval(x+dd, x+d), Interval(y, y+dd));
58 case 2:
59 return Rect(Interval(x, x+dd), Interval(y+dd, y+d));
60 case 3:
61 return Rect(Interval(x+dd, x+d), Interval(y+dd, y+d));
62 default:
63 /* just to suppress warning message
64 * this case should be never reached */
65 assert(false);
66 }
67 }
68 };
70 class QuadTree{
71 public:
72 Quad* root;
73 double scale;
74 double bx0, bx1;
75 double by0, by1;
77 QuadTree() : root(0), scale(1) {}
79 Quad* search(double x0, double y0, double x1, double y1);
80 void insert(double x0, double y0, double x1, double y1, int shape);
81 Quad* search(Geom::Rect const &r);
82 void insert(Geom::Rect const &r, int shape);
83 void erase(Quad *q, int shape);
84 private:
85 bool clean_root();
86 };
88 };
90 /*
91 Local Variables:
92 mode:c++
93 c-file-style:"stroustrup"
94 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
95 indent-tabs-mode:nil
96 fill-column:99
97 End:
98 */
99 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :