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# RightmostEdgeFinder.h

    00001 /**********************************************************************
    00002  * $Id: RightmostEdgeFinder.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  * Last port: operation/buffer/RightmostEdgeFinder.java rev. 1.13 (JTS-1.7)
    00017  *
    00018  **********************************************************************/
    00019
    00020 #ifndef GEOS_OP_BUFFER_RIGHTMOSTEDGEFINDER_H
    00021 #define GEOS_OP_BUFFER_RIGHTMOSTEDGEFINDER_H
    00022
    00023 #include <geos/geom/Coordinate.h> // for composition
    00024
    00025 #include <vector>
    00026
    00027 // Forward declarations
    00028 namespace geos {
    00029         namespace geom {
    00030         }
    00031         namespace geomgraph {
    00032                 class DirectedEdge;
    00033         }
    00034 }
    00035
    00036 namespace geos {
    00037 namespace operation { // geos.operation
    00038 namespace buffer { // geos.operation.buffer
    00039
    00046 class RightmostEdgeFinder {
    00047
    00048 private:
    00049
    00050         int minIndex;
    00051
    00052         geom::Coordinate minCoord;
    00053
    00054         geomgraph::DirectedEdge *minDe;
    00055
    00056         geomgraph::DirectedEdge *orientedDe;
    00057
    00058         void findRightmostEdgeAtNode();
    00059
    00060         void findRightmostEdgeAtVertex();
    00061
    00062         void checkForRightmostCoordinate(geomgraph::DirectedEdge *de);
    00063
    00064         int getRightmostSide(geomgraph::DirectedEdge *de, int index);
    00065
    00066         int getRightmostSideOfSegment(geomgraph::DirectedEdge *de, int i);
    00067
    00068 public:
    00069
    00077         RightmostEdgeFinder();
    00078
    00079         geomgraph::DirectedEdge* getEdge();
    00080
    00081         geom::Coordinate& getCoordinate();
    00082
    00084         void findEdge(std::vector<geomgraph::DirectedEdge*>* dirEdgeList);
    00085 };
    00086
    00087 /*public*/
    00088 inline geomgraph::DirectedEdge*
    00089 RightmostEdgeFinder::getEdge()
    00090 {
    00091         return orientedDe;
    00092 }
    00093
    00094 /*public*/
    00095 inline geom::Coordinate&
    00096 RightmostEdgeFinder::getCoordinate()
    00097 {
    00098         return minCoord;
    00099 }
    00100
    00101
    00102
    00103
    00104 } // namespace geos::operation::buffer
    00105 } // namespace geos::operation
    00106 } // namespace geos
    00107
    00108 #endif // ndef GEOS_OP_BUFFER_RIGHTMOSTEDGEFINDER_H
    00109
    00110 /**********************************************************************
    00111  * $Log$
    00112  * Revision 1.3  2006/05/04 12:19:59  strk
    00113  * Added note about findEdge() only scanning for forward DirectedEdges
    00114  *
    00115  * Revision 1.2  2006/04/05 09:20:25  strk
    00116  * Added port informations and many assertion checking.
    00117  * Fixed bug in getRightmostSide() method ( a "testing-only" corner case )
    00118  *
    00119  * Revision 1.1  2006/03/14 00:19:40  strk
    00120  * opBuffer.h split, streamlined headers in some (not all) files in operation/buffer/
    00121  *
    00122  **********************************************************************/
    00123