1 /*
2 * PathVector - std::vector containing Geom::Path
3 * This file provides a set of operations that can be performed on PathVector,
4 * e.g. an affine transform.
5 *
6 * Authors:
7 * Johan Engelen <goejendaagh@zonnet.nl>
8 *
9 * Copyright 2008 authors
10 *
11 * This library is free software; you can redistribute it and/or
12 * modify it either under the terms of the GNU Lesser General Public
13 * License version 2.1 as published by the Free Software Foundation
14 * (the "LGPL") or, at your option, under the terms of the Mozilla
15 * Public License Version 1.1 (the "MPL"). If you do not alter this
16 * notice, a recipient may use your version of this file under either
17 * the MPL or the LGPL.
18 *
19 * You should have received a copy of the LGPL along with this library
20 * in the file COPYING-LGPL-2.1; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * You should have received a copy of the MPL along with this library
23 * in the file COPYING-MPL-1.1
24 *
25 * The contents of this file are subject to the Mozilla Public License
26 * Version 1.1 (the "License"); you may not use this file except in
27 * compliance with the License. You may obtain a copy of the License at
28 * http://www.mozilla.org/MPL/
29 *
30 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
31 * OF ANY KIND, either express or implied. See the LGPL or the MPL for
32 * the specific language governing rights and limitations.
33 */
35 #ifndef SEEN_GEOM_PATHVECTOR_CPP
36 #define SEEN_GEOM_PATHVECTOR_CPP
38 #include <2geom/pathvector.h>
40 #include <2geom/path.h>
41 #include <2geom/matrix.h>
43 namespace Geom {
45 // TODO: see which of these functions can be inlined for optimization
47 /**
48 * Reverses all Paths and the order of paths in the vector as well
49 **/
50 PathVector reverse_paths_and_order (PathVector const & path_in)
51 {
52 PathVector path_out;
53 for (PathVector::const_reverse_iterator it = path_in.rbegin(); it != path_in.rend(); ++it) {
54 path_out.push_back( (*it).reverse() );
55 }
56 return path_out;
57 }
59 OptRect bounds_fast( PathVector const& pv )
60 {
61 typedef PathVector::const_iterator const_iterator;
63 OptRect bound;
64 if (pv.empty()) return bound;
66 bound = (pv.begin())->boundsFast();
67 for (const_iterator it = ++(pv.begin()); it != pv.end(); ++it)
68 {
69 bound.unionWith(it->boundsFast());
70 }
71 return bound;
72 }
74 OptRect bounds_exact( PathVector const& pv )
75 {
76 typedef PathVector::const_iterator const_iterator;
78 OptRect bound;
79 if (pv.empty()) return bound;
81 bound = (pv.begin())->boundsExact();
82 for (const_iterator it = ++(pv.begin()); it != pv.end(); ++it)
83 {
84 bound.unionWith(it->boundsExact());
85 }
86 return bound;
87 }
89 /* Note: undefined for empty pathvectors or pathvectors with empty paths.
90 * */
91 boost::optional<PathVectorPosition> nearestPoint(PathVector const & path_in, Point const& _point, double *distance_squared)
92 {
93 boost::optional<PathVectorPosition> retval;
95 double mindsq = infinity();
96 unsigned int i = 0;
97 for (Geom::PathVector::const_iterator pit = path_in.begin(); pit != path_in.end(); ++pit) {
98 double dsq;
99 double t = pit->nearestPoint(_point, &dsq);
100 //std::cout << t << "," << dsq << std::endl;
101 if (dsq < mindsq) {
102 mindsq = dsq;
103 retval = PathVectorPosition(i, t);
104 }
106 ++i;
107 }
109 if (distance_squared) {
110 *distance_squared = mindsq;
111 }
112 return retval;
113 }
115 std::vector<PathVectorPosition> allNearestPoints(PathVector const & path_in, Point const& _point, double *distance_squared)
116 {
117 std::vector<PathVectorPosition> retval;
119 double mindsq = infinity();
120 unsigned int i = 0;
121 for (Geom::PathVector::const_iterator pit = path_in.begin(); pit != path_in.end(); ++pit) {
122 double dsq;
123 double t = pit->nearestPoint(_point, &dsq);
124 if (dsq < mindsq) {
125 mindsq = dsq;
126 retval.push_back(PathVectorPosition(i, t));
127 }
129 ++i;
130 }
132 if (distance_squared) {
133 *distance_squared = mindsq;
134 }
135 return retval;
137 }
139 } // namespace Geom
141 #endif // SEEN_GEOM_PATHVECTOR_CPP
143 /*
144 Local Variables:
145 mode:c++
146 c-file-style:"stroustrup"
147 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
148 indent-tabs-mode:nil
149 fill-column:99
150 End:
151 */
152 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :