GEOS: PointBuilder.h Source File

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PointBuilder.h
1 /**********************************************************************
2 *
3 * GEOS - Geometry Engine Open Source
4 * http://geos.osgeo.org
5 *
6 * Copyright (C) 2006 Refractions Research Inc.
7 *
8 * This is free software; you can redistribute and/or modify it under
9 * the terms of the GNU Lesser General Public Licence as published
10 * by the Free Software Foundation.
11 * See the COPYING file for more information.
12 *
13 ***********************************************************************
14 *
15 * Last port: operation/overlay/PointBuilder.java rev. 1.16 (JTS-1.10)
16 *
17 **********************************************************************/
18
19 #ifndef GEOS_OP_OVERLAY_POINTBUILDER_H
20 #define GEOS_OP_OVERLAY_POINTBUILDER_H
21
22 #include <geos/export.h>
23
24 #include <geos/geom/GeometryFactory.h> // for inlines
25 #include <geos/operation/overlay/OverlayOp.h> // for OpCode enum
26 #include <geos/util.h>
27
28 #include <vector>
29
30 // Forward declarations
31 namespace geos {
32 namespace geom {
33 class GeometryFactory;
34 class Point;
35 }
36 namespace geomgraph {
37 class Node;
38 }
39 namespace algorithm {
40 class PointLocator;
41 }
42 namespace operation {
43 namespace overlay {
44 class OverlayOp;
45 }
46 }
47 }
48
49 namespace geos {
50 namespace operation { // geos::operation
51 namespace overlay { // geos::operation::overlay
52
56 class GEOS_DLL PointBuilder {
57 private:
58
59 OverlayOp *op;
60 const geom::GeometryFactory *geometryFactory;
61 void extractNonCoveredResultNodes(OverlayOp::OpCode opCode);
62
63 /*
64 * Converts non-covered nodes to Point objects and adds them to
65 * the result.
66 *
67 * A node is covered if it is contained in another element Geometry
68 * with higher dimension (e.g. a node point might be contained in
69 * a polygon, in which case the point can be eliminated from
70 * the result).
71 *
72 * @param n the node to test
73 */
74 void filterCoveredNodeToPoint(const geomgraph::Node *);
75
79 std::vector<geom::Point*> *resultPointList;
80
81 public:
82
83 PointBuilder(OverlayOp *newOp,
84 const geom::GeometryFactory *newGeometryFactory,
85 algorithm::PointLocator *newPtLocator=NULL)
86 :
87 op(newOp),
88 geometryFactory(newGeometryFactory),
89 resultPointList(new std::vector<geom::Point *>())
90 {
91 ::geos::ignore_unused_variable_warning(newPtLocator);
92 }
93
98 std::vector<geom::Point*>* build(OverlayOp::OpCode opCode);
99 };
100
101
102 } // namespace geos::operation::overlay
103 } // namespace geos::operation
104 } // namespace geos
105
106 #endif // ndef GEOS_OP_OVERLAY_POINTBUILDER_H
geos::operation::overlay::OverlayOp::OpCode
OpCode
The spatial functions supported by this class.
Definition: OverlayOp.h:77
geos::operation::overlay::OverlayOp
Computes the geometric overlay of two Geometry.
Definition: OverlayOp.h:68
geos::algorithm::PointLocator
Computes the topological relationship (Location) of a single point to a Geometry. ...
Definition: PointLocator.h:57
geos::operation::overlay::PointBuilder
Constructs geom::Point s from the nodes of an overlay graph.
Definition: PointBuilder.h:56
geos::geom::GeometryFactory
Supplies a set of utility methods for building Geometry objects from CoordinateSequence or other Geom...
Definition: GeometryFactory.h:67
geos
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:25
geos::geomgraph::Node
Definition: geomgraph/Node.h:62