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LineBuilder.h

00001 /**********************************************************************
00002  * $Id: LineBuilder.h 2565 2009-06-08 16:26:36Z strk $
00003  *
00004  * GEOS - Geometry Engine Open Source
00005  * http://geos.refractions.net
00006  *
00007  * Copyright (C) 2006 Refractions Research Inc.
00008  *
00009  * This is free software; you can redistribute and/or modify it under
00010  * the terms of the GNU Lesser General Public Licence as published
00011  * by the Free Software Foundation. 
00012  * See the COPYING file for more information.
00013  *
00014  ***********************************************************************
00015  *
00016  * Last port: operation/overlay/LineBuilder.java rev. 1.15 (JTS-1.10)
00017  *
00018  **********************************************************************/
00019 
00020 #ifndef GEOS_OP_OVERLAY_LINEBUILDER_H
00021 #define GEOS_OP_OVERLAY_LINEBUILDER_H
00022 
00023 #include <geos/export.h>
00024 
00025 #include <geos/operation/overlay/OverlayOp.h> // for OverlayOp::OpCode enum 
00026 
00027 #include <vector>
00028 
00029 // Forward declarations
00030 namespace geos {
00031         namespace geom {
00032                 class GeometryFactory;
00033                 class CoordinateSequence;
00034                 class LineString;
00035         }
00036         namespace geomgraph {
00037                 class DirectedEdge;
00038                 class Edge;
00039         }
00040         namespace algorithm {
00041                 class PointLocator;
00042         }
00043         namespace operation {
00044                 namespace overlay {
00045                         class OverlayOp;
00046                 }
00047         }
00048 }
00049 
00050 namespace geos {
00051 namespace operation { // geos::operation
00052 namespace overlay { // geos::operation::overlay
00053 
00059 class GEOS_DLL LineBuilder {
00060 
00061 public:
00062 
00063         LineBuilder(OverlayOp *newOp,
00064                         const geom::GeometryFactory *newGeometryFactory,
00065                         algorithm::PointLocator *newPtLocator);
00066 
00067         ~LineBuilder();
00068 
00072         std::vector<geom::LineString*>* build(OverlayOp::OpCode opCode);
00073 
00085         void collectLineEdge(geomgraph::DirectedEdge *de,
00086                         OverlayOp::OpCode opCode,
00087                         std::vector<geomgraph::Edge*>* edges);
00088 
00089 private:
00090         OverlayOp *op;
00091         const geom::GeometryFactory *geometryFactory;
00092         algorithm::PointLocator *ptLocator;
00093         std::vector<geomgraph::Edge*> lineEdgesList;
00094         std::vector<geom::LineString*>* resultLineList;
00095         void findCoveredLineEdges();
00096         void collectLines(OverlayOp::OpCode opCode);
00097         void buildLines(OverlayOp::OpCode opCode);
00098         void labelIsolatedLines(std::vector<geomgraph::Edge*> *edgesList);
00099 
00110         void collectBoundaryTouchEdge(geomgraph::DirectedEdge *de,
00111                         OverlayOp::OpCode opCode,
00112                         std::vector<geomgraph::Edge*>* edges);
00113 
00117         void labelIsolatedLine(geomgraph::Edge *e, int targetIndex);
00118 
00119         /*
00120          * If the given CoordinateSequence has mixed 3d/2d vertexes
00121          * set Z for all vertexes missing it.
00122          * The Z value is interpolated between 3d vertexes and copied
00123          * from a 3d vertex to the end.
00124          */
00125         void propagateZ(geom::CoordinateSequence *cs);
00126 };
00127 
00128 
00129 } // namespace geos::operation::overlay
00130 } // namespace geos::operation
00131 } // namespace geos
00132 
00133 #endif // ndef GEOS_OP_OVERLAY_LINEBUILDER_H
00134 
00135 /**********************************************************************
00136  * $Log$
00137  * Revision 1.2  2006/06/05 15:36:34  strk
00138  * Given OverlayOp funx code enum a name and renamed values to have a lowercase prefix. Drop all of noding headers from installed header set.
00139  *
00140  * Revision 1.1  2006/03/17 13:24:59  strk
00141  * opOverlay.h header splitted. Reduced header inclusions in operation/overlay implementation files. ElevationMatrixFilter code moved from own file to ElevationMatrix.cpp (ideally a class-private).
00142  *
00143  **********************************************************************/
00144 

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