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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