polygonizedirectededge.cpp

来自「一个很好的vc底层代码」· C++ 代码 · 共 123 行

/**********************************************************************
 * $Id: PolygonizeDirectedEdge.cpp,v 1.4 2004/10/19 19:51:14 strk Exp $
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.refractions.net
 *
 * 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/opPolygonize.h>

namespace geos {

/**
 * Constructs a directed edge connecting the <code>from</code> node to the
 * <code>to</code> node.
 *
 * @param directionPt
 *        specifies this DirectedEdge's direction (given by an imaginary
 *        line from the <code>from</code> node to <code>directionPt</code>)
 *
 * @param edgeDirection
 *        whether this DirectedEdge's direction is the same as or
 *        opposite to that of the parent Edge (if any)
 */
PolygonizeDirectedEdge::PolygonizeDirectedEdge(planarNode *newFrom,
	planarNode *newTo, const Coordinate& newDirectionPt,
	bool nEdgeDirection): planarDirectedEdge(newFrom, newTo,
		newDirectionPt, nEdgeDirection)
{
	edgeRing=NULL;
	next=NULL;
	label=-1;
}

/*
 * Returns the identifier attached to this directed edge.
 */
long
PolygonizeDirectedEdge::getLabel() const
{ 
	return label;
}

/*
 * Attaches an identifier to this directed edge.
 */
void PolygonizeDirectedEdge::setLabel(long newLabel) { 
	label=newLabel;
}

/*
 * Returns the next directed edge in the EdgeRing that this directed
 * edge is a member of.
 */
PolygonizeDirectedEdge *
PolygonizeDirectedEdge::getNext() const
{
	return next;
}

/*
 * Sets the next directed edge in the EdgeRing that this directed
 * edge is a member of.
 */
void
PolygonizeDirectedEdge::setNext(PolygonizeDirectedEdge *newNext)
{
	next=newNext;
}

/*
 * Returns the ring of directed edges that this directed edge is
 * a member of, or null if the ring has not been set.
 * @see #setRing(EdgeRing)
 */
bool
PolygonizeDirectedEdge::isInRing() const
{ 
	return edgeRing!=NULL;
}

/*
 * Sets the ring of directed edges that this directed edge is
 * a member of.
 */
void
PolygonizeDirectedEdge::setRing(polygonizeEdgeRing *newEdgeRing)
{
	edgeRing=newEdgeRing;
}

}

/**********************************************************************
 * $Log: PolygonizeDirectedEdge.cpp,v $
 * Revision 1.4  2004/10/19 19:51:14  strk
 * Fixed many leaks and bugs in Polygonizer.
 * Output still bogus.
 *
 * Revision 1.3  2004/10/13 10:03:02  strk
 * Added missing linemerge and polygonize operation.
 * Bug fixes and leaks removal from the newly added modules and
 * planargraph (used by them).
 * Some comments and indentation changes.
 *
 * Revision 1.2  2004/07/02 13:28:29  strk
 * Fixed all #include lines to reflect headers layout change.
 * Added client application build tips in README.
 *
 * Revision 1.1  2004/04/08 04:53:56  ybychkov
 * "operation/polygonize" ported from JTS 1.4
 *
 *
 **********************************************************************/