LineBuilder.h

00001 /**********************************************************************
00002  * $Id: LineBuilder.h 1820 2006-09-06 16:54:23Z mloskot $
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 #ifndef GEOS_OP_OVERLAY_LINEBUILDER_H
00017 #define GEOS_OP_OVERLAY_LINEBUILDER_H
00018 
00019 #include <geos/operation/overlay/OverlayOp.h> // for OverlayOp::OpCode enum 
00020 
00021 #include <vector>
00022 
00023 // Forward declarations
00024 namespace geos {
00025         namespace geom {
00026                 class GeometryFactory;
00027                 class CoordinateSequence;
00028                 class LineString;
00029         }
00030         namespace geomgraph {
00031                 class DirectedEdge;
00032                 class Edge;
00033         }
00034         namespace algorithm {
00035                 class PointLocator;
00036         }
00037         namespace operation {
00038                 namespace overlay {
00039                         class OverlayOp;
00040                 }
00041         }
00042 }
00043 
00044 namespace geos {
00045 namespace operation { // geos::operation
00046 namespace overlay { // geos::operation::overlay
00047 
00053 class LineBuilder {
00054 
00055 public:
00056 
00057         LineBuilder(OverlayOp *newOp,
00058                         const geom::GeometryFactory *newGeometryFactory,
00059                         algorithm::PointLocator *newPtLocator);
00060 
00061         ~LineBuilder();
00062 
00066         std::vector<geom::LineString*>* build(OverlayOp::OpCode opCode);
00067 
00075         void collectLineEdge(geomgraph::DirectedEdge *de,
00076                         OverlayOp::OpCode opCode,
00077                         std::vector<geomgraph::Edge*>* edges);
00078 
00089         void collectBoundaryTouchEdge(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 
00107         void labelIsolatedLine(geomgraph::Edge *e, int targetIndex);
00108 
00109         /*
00110          * If the given CoordinateSequence has mixed 3d/2d vertexes
00111          * set Z for all vertexes missing it.
00112          * The Z value is interpolated between 3d vertexes and copied
00113          * from a 3d vertex to the end.
00114          */
00115         void propagateZ(geom::CoordinateSequence *cs);
00116 };
00117 
00118 
00119 } // namespace geos::operation::overlay
00120 } // namespace geos::operation
00121 } // namespace geos
00122 
00123 #endif // ndef GEOS_OP_OVERLAY_LINEBUILDER_H
00124 
00125 /**********************************************************************
00126  * $Log$
00127  * Revision 1.2  2006/06/05 15:36:34  strk
00128  * Given OverlayOp funx code enum a name and renamed values to have a lowercase prefix. Drop all of noding headers from installed header set.
00129  *
00130  * Revision 1.1  2006/03/17 13:24:59  strk
00131  * 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).
00132  *
00133  **********************************************************************/
00134 

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