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PointBuilder.h
1 /**********************************************************************
2 * $Id: PointBuilder.h 2757 2009-12-01 15:39:41Z mloskot $
3 *
4 * GEOS - Geometry Engine Open Source
5 * http://geos.refractions.net
6 *
7 * Copyright (C) 2006 Refractions Research Inc.
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 * Last port: operation/overlay/PointBuilder.java rev. 1.16 (JTS-1.10)
17 *
18 **********************************************************************/
19
20 #ifndef GEOS_OP_OVERLAY_POINTBUILDER_H
21 #define GEOS_OP_OVERLAY_POINTBUILDER_H
22
23 #include <geos/export.h>
24
25 #include <geos/geom/GeometryFactory.h> // for inlines
26 #include <geos/operation/overlay/OverlayOp.h> // for OpCode enum
27 #include <geos/util.h>
28
29 #include <vector>
30
31 // Forward declarations
32 namespace geos {
33 namespace geom {
34 class GeometryFactory;
35 class Point;
36 }
37 namespace geomgraph {
38 class Node;
39 }
40 namespace algorithm {
41 class PointLocator;
42 }
43 namespace operation {
44 namespace overlay {
45 class OverlayOp;
46 }
47 }
48 }
49
50 namespace geos {
51 namespace operation { // geos::operation
52 namespace overlay { // geos::operation::overlay
53
57 class GEOS_DLL PointBuilder {
58 private:
59
60 OverlayOp *op;
61 const geom::GeometryFactory *geometryFactory;
62 void extractNonCoveredResultNodes(OverlayOp::OpCode opCode);
63
64 /*
65 * Converts non-covered nodes to Point objects and adds them to
66 * the result.
67 *
68 * A node is covered if it is contained in another element Geometry
69 * with higher dimension (e.g. a node point might be contained in
70 * a polygon, in which case the point can be eliminated from
71 * the result).
72 *
73 * @param n the node to test
74 */
75 void filterCoveredNodeToPoint(const geomgraph::Node *);
76
80 std::vector<geom::Point*> *resultPointList;
81
82 public:
83
84 PointBuilder(OverlayOp *newOp,
85 const geom::GeometryFactory *newGeometryFactory,
86 algorithm::PointLocator *newPtLocator=NULL)
87 :
88 op(newOp),
89 geometryFactory(newGeometryFactory),
90 resultPointList(new std::vector<geom::Point *>())
91 {
92 ::geos::ignore_unused_variable_warning(newPtLocator);
93 }
94
99 std::vector<geom::Point*>* build(OverlayOp::OpCode opCode);
100 };
101
102
103 } // namespace geos::operation::overlay
104 } // namespace geos::operation
105 } // namespace geos
106
107 #endif // ndef GEOS_OP_OVERLAY_POINTBUILDER_H
108
109 /**********************************************************************
110 * $Log$
111 * Revision 1.2 2006/06/05 15:36:34 strk
112 * Given OverlayOp funx code enum a name and renamed values to have a lowercase prefix. Drop all of noding headers from installed header set.
113 *
114 * Revision 1.1 2006/03/17 13:24:59 strk
115 * opOverlay.h header splitted. Reduced header inclusions in operation/overlay implementation files. ElevationMatrixFilter code moved from own file to ElevationMatrix.cpp (ideally a class-private).
116 *
117 **********************************************************************/
118