LineBuilder.h

00001 /**********************************************************************
00002  *
00003  * GEOS - Geometry Engine Open Source
00004  * http://geos.osgeo.org
00005  *
00006  * Copyright (C) 2006 Refractions Research Inc.
00007  *
00008  * This is free software; you can redistribute and/or modify it under
00009  * the terms of the GNU Lesser General Public Licence as published
00010  * by the Free Software Foundation. 
00011  * See the COPYING file for more information.
00012  *
00013  ***********************************************************************
00014  *
00015  * Last port: operation/overlay/LineBuilder.java rev. 1.15 (JTS-1.10)
00016  *
00017  **********************************************************************/
00018 
00019 #ifndef GEOS_OP_OVERLAY_LINEBUILDER_H
00020 #define GEOS_OP_OVERLAY_LINEBUILDER_H
00021 
00022 #include <geos/export.h>
00023 
00024 #include <geos/operation/overlay/OverlayOp.h> // for OverlayOp::OpCode enum 
00025 
00026 #include <vector>
00027 
00028 #ifdef _MSC_VER
00029 #pragma warning(push)
00030 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
00031 #endif
00032 
00033 // Forward declarations
00034 namespace geos {
00035         namespace geom {
00036                 class GeometryFactory;
00037                 class CoordinateSequence;
00038                 class LineString;
00039         }
00040         namespace geomgraph {
00041                 class DirectedEdge;
00042                 class Edge;
00043         }
00044         namespace algorithm {
00045                 class PointLocator;
00046         }
00047         namespace operation {
00048                 namespace overlay {
00049                         class OverlayOp;
00050                 }
00051         }
00052 }
00053 
00054 namespace geos {
00055 namespace operation { // geos::operation
00056 namespace overlay { // geos::operation::overlay
00057 
00063 class GEOS_DLL LineBuilder {
00064 
00065 public:
00066 
00067         LineBuilder(OverlayOp *newOp,
00068                         const geom::GeometryFactory *newGeometryFactory,
00069                         algorithm::PointLocator *newPtLocator);
00070 
00071         ~LineBuilder();
00072 
00076         std::vector<geom::LineString*>* build(OverlayOp::OpCode opCode);
00077 
00089         void collectLineEdge(geomgraph::DirectedEdge *de,
00090                         OverlayOp::OpCode opCode,
00091                         std::vector<geomgraph::Edge*>* edges);
00092 
00093 private:
00094         OverlayOp *op;
00095         const geom::GeometryFactory *geometryFactory;
00096         algorithm::PointLocator *ptLocator;
00097         std::vector<geomgraph::Edge*> lineEdgesList;
00098         std::vector<geom::LineString*>* resultLineList;
00099         void findCoveredLineEdges();
00100         void collectLines(OverlayOp::OpCode opCode);
00101         void buildLines(OverlayOp::OpCode opCode);
00102         void labelIsolatedLines(std::vector<geomgraph::Edge*> *edgesList);
00103 
00114         void collectBoundaryTouchEdge(geomgraph::DirectedEdge *de,
00115                         OverlayOp::OpCode opCode,
00116                         std::vector<geomgraph::Edge*>* edges);
00117 
00121         void labelIsolatedLine(geomgraph::Edge *e, int targetIndex);
00122 
00123         /*
00124          * If the given CoordinateSequence has mixed 3d/2d vertexes
00125          * set Z for all vertexes missing it.
00126          * The Z value is interpolated between 3d vertexes and copied
00127          * from a 3d vertex to the end.
00128          */
00129         void propagateZ(geom::CoordinateSequence *cs);
00130 };
00131 
00132 } // namespace geos::operation::overlay
00133 } // namespace geos::operation
00134 } // namespace geos
00135 
00136 #ifdef _MSC_VER
00137 #pragma warning(pop)
00138 #endif
00139 
00140 #endif // ndef GEOS_OP_OVERLAY_LINEBUILDER_H

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