/src/geos/src/operation/valid/PolygonRingSelfNode.cpp
Line | Count | Source |
1 | | /********************************************************************** |
2 | | * |
3 | | * GEOS - Geometry Engine Open Source |
4 | | * http://geos.osgeo.org |
5 | | * |
6 | | * Copyright (C) 2021 Paul Ramsey <pramsey@cleverelephant.ca> |
7 | | * Copyright (C) 2021 Martin Davis |
8 | | * |
9 | | * This is free software; you can redistribute and/or modify it under |
10 | | * the terms of the GNU Lesser General Public Licence as published |
11 | | * by the Free Software Foundation. |
12 | | * See the COPYING file for more information. |
13 | | * |
14 | | **********************************************************************/ |
15 | | |
16 | | #include <geos/algorithm/PolygonNodeTopology.h> |
17 | | #include <geos/operation/valid/PolygonRingSelfNode.h> |
18 | | |
19 | | |
20 | | namespace geos { // geos |
21 | | namespace operation { // geos.operation |
22 | | namespace valid { // geos.operation.valid |
23 | | |
24 | | using geos::algorithm::PolygonNodeTopology; |
25 | | |
26 | | /* public */ |
27 | | bool |
28 | | PolygonRingSelfNode::isExterior(bool isInteriorOnRight) const |
29 | 0 | { |
30 | 0 | (void)e11; // unused variable |
31 | | /** |
32 | | * Note that either corner and either of the other edges could be used to test. |
33 | | * The situation is fully symmetrical. |
34 | | */ |
35 | 0 | bool bIsInteriorSeg = PolygonNodeTopology::isInteriorSegment(&nodePt, e00, e01, e10); |
36 | 0 | bool bIsExterior = isInteriorOnRight ? ! bIsInteriorSeg : bIsInteriorSeg; |
37 | 0 | return bIsExterior; |
38 | 0 | } |
39 | | |
40 | | |
41 | | } // namespace geos.operation.valid |
42 | | } // namespace geos.operation |
43 | | } // namespace geos |