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