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/**********************************************************************
* $Id: LineMergeDirectedEdge.cpp 1820 2006-09-06 16:54:23Z mloskot $
*
* GEOS - Geometry Engine Open Source
* http://geos.refractions.net
*
* Copyright (C) 2005-2006 Refractions Research Inc.
* Copyright (C) 2001-2002 Vivid Solutions Inc.
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU Lesser General Public Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
**********************************************************************/
#include <geos/operation/linemerge/LineMergeDirectedEdge.h>
#include <geos/planargraph/DirectedEdge.h>
#include <geos/planargraph/Node.h>
#include <cassert>
//using namespace geos::planargraph;
using namespace geos::geom;
namespace geos {
namespace operation { // geos.operation
namespace linemerge { // geos.operation.linemerge
LineMergeDirectedEdge::LineMergeDirectedEdge(
planargraph::Node *newFrom,
planargraph::Node *newTo,
const Coordinate& newDirectionPt,
bool nEdgeDirection)
:
planargraph::DirectedEdge(newFrom, newTo,
newDirectionPt, nEdgeDirection)
{}
/**
* Returns the directed edge that starts at this directed edge's end point,
* or null if there are zero or multiple directed edges starting there.
* @return
*/
LineMergeDirectedEdge*
LineMergeDirectedEdge::getNext()
{
if (getToNode()->getDegree()!=2) {
return NULL;
}
if (getToNode()->getOutEdges()->getEdges()[0]==getSym()) {
return (LineMergeDirectedEdge*) getToNode()->getOutEdges()->getEdges()[1];
}
assert(getToNode()->getOutEdges()->getEdges()[1]==getSym());
LineMergeDirectedEdge* nextedge = dynamic_cast<LineMergeDirectedEdge*>(getToNode()->getOutEdges()->getEdges()[0]);
assert(nextedge);
return nextedge;
}
} // namespace geos.operation.linemerge
} // namespace geos.operation
} //namespace geos
/**********************************************************************
* $Log$
* Revision 1.8 2006/03/22 10:13:54 strk
* opLinemerge.h split
*
* Revision 1.7 2006/03/21 21:42:54 strk
* planargraph.h header split, planargraph:: classes renamed to match JTS symbols
*
**********************************************************************/
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