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110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
1 month ago
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/**********************************************************************
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*
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* GEOS - Geometry Engine Open Source
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* http://geos.osgeo.org
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*
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* Copyright (C) 2006 Refractions Research Inc.
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU Lesser General Public Licence as published
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* by the Free Software Foundation.
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* See the COPYING file for more information.
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*
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***********************************************************************
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*
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* Last port: operation/overlay/PointBuilder.java rev. 1.16 (JTS-1.10)
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*
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**********************************************************************/
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#ifndef GEOS_OP_OVERLAY_POINTBUILDER_H
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#define GEOS_OP_OVERLAY_POINTBUILDER_H
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#include <geos/export.h>
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#include <geos/geom/GeometryFactory.h> // for inlines
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#include <geos/operation/overlay/OverlayOp.h> // for OpCode enum
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#include <geos/util.h>
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#include <vector>
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// Forward declarations
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namespace geos {
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namespace geom {
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class GeometryFactory;
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class Point;
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}
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namespace geomgraph {
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class Node;
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}
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namespace algorithm {
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class PointLocator;
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}
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namespace operation {
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namespace overlay {
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class OverlayOp;
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}
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}
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}
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namespace geos {
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namespace operation { // geos::operation
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namespace overlay { // geos::operation::overlay
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/** \brief
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* Constructs geom::Point s from the nodes of an overlay graph.
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*/
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class GEOS_DLL PointBuilder {
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private:
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OverlayOp* op;
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const geom::GeometryFactory* geometryFactory;
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void extractNonCoveredResultNodes(OverlayOp::OpCode opCode);
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/*
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* Converts non-covered nodes to Point objects and adds them to
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* the result.
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*
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* A node is covered if it is contained in another element Geometry
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* with higher dimension (e.g. a node point might be contained in
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* a polygon, in which case the point can be eliminated from
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* the result).
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*
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* @param n the node to test
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*/
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void filterCoveredNodeToPoint(const geomgraph::Node*);
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/// Allocated a construction time, but not owned.
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/// Make sure you take ownership of it, getting
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/// it from build()
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std::vector<geom::Point*>* resultPointList;
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PointBuilder(const PointBuilder&) = delete;
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PointBuilder& operator=(const PointBuilder&) = delete;
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public:
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PointBuilder(OverlayOp* newOp,
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const geom::GeometryFactory* newGeometryFactory,
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algorithm::PointLocator* newPtLocator = nullptr)
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:
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op(newOp),
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geometryFactory(newGeometryFactory),
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resultPointList(new std::vector<geom::Point *>())
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{
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::geos::ignore_unused_variable_warning(newPtLocator);
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}
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/**
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* @return a list of the Points in the result of the specified
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* overlay operation
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*/
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std::vector<geom::Point*>* build(OverlayOp::OpCode opCode);
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};
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} // namespace geos::operation::overlay
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} // namespace geos::operation
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} // namespace geos
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#endif // ndef GEOS_OP_OVERLAY_POINTBUILDER_H
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