GEOS  3.11.0beta2
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 #pragma once
20 
21 #include <geos/export.h>
22 
23 #include <geos/geom/GeometryFactory.h> // for inlines
24 #include <geos/operation/overlay/OverlayOp.h> // for OpCode enum
25 
26 #include <vector>
27 
28 // Forward declarations
29 namespace geos {
30 namespace geom {
31 class GeometryFactory;
32 class Point;
33 }
34 namespace geomgraph {
35 class Node;
36 }
37 namespace algorithm {
38 class PointLocator;
39 }
40 namespace operation {
41 namespace overlay {
42 class OverlayOp;
43 }
44 }
45 }
46 
47 namespace geos {
48 namespace operation { // geos::operation
49 namespace overlay { // geos::operation::overlay
50 
54 class GEOS_DLL PointBuilder {
55 private:
56 
57  OverlayOp* op;
58  const geom::GeometryFactory* geometryFactory;
59  void extractNonCoveredResultNodes(OverlayOp::OpCode opCode);
60 
61  /*
62  * Converts non-covered nodes to Point objects and adds them to
63  * the result.
64  *
65  * A node is covered if it is contained in another element Geometry
66  * with higher dimension (e.g. a node point might be contained in
67  * a polygon, in which case the point can be eliminated from
68  * the result).
69  *
70  * @param n the node to test
71  */
72  void filterCoveredNodeToPoint(const geomgraph::Node*);
73 
77  std::vector<geom::Point*>* resultPointList;
78 
79  PointBuilder(const PointBuilder&) = delete;
80  PointBuilder& operator=(const PointBuilder&) = delete;
81 
82 public:
83 
84  PointBuilder(OverlayOp* newOp,
85  const geom::GeometryFactory* newGeometryFactory,
86  algorithm::PointLocator* newPtLocator = nullptr)
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 
Computes the topological relationship (Location) of a single point to a Geometry.
Definition: PointLocator.h:56
Supplies a set of utility methods for building Geometry objects from CoordinateSequence or other Geom...
Definition: GeometryFactory.h:66
The node component of a geometry graph.
Definition: geomgraph/Node.h:59
Computes the geometric overlay of two Geometry.
Definition: OverlayOp.h:69
OpCode
The spatial functions supported by this class.
Definition: OverlayOp.h:78
Constructs geom::Point s from the nodes of an overlay graph.
Definition: PointBuilder.h:54
std::vector< geom::Point * > * build(OverlayOp::OpCode opCode)
Basic namespace for all GEOS functionalities.
Definition: Angle.h:25