128 lines
3.2 KiB
C
128 lines
3.2 KiB
C
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/**********************************************************************
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*
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* GEOS - Geometry Engine Open Source
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* http://geos.osgeo.org
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*
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* Copyright (C) 2006 Refractions Research Inc.
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* Copyright (C) 2001-2002 Vivid Solutions Inc.
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU Lesser General Public Licence as published
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* by the Free Software Foundation.
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* See the COPYING file for more information.
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*
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**********************************************************************
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*
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* Last port: operation/polygonize/PolygonizeDirectedEdge.java rev. 1.4 (JTS-1.10)
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*
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**********************************************************************/
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#pragma once
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#include <geos/export.h>
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#include <geos/planargraph/DirectedEdge.h> // for inheritance
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// Forward declarations
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namespace geos {
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namespace geom {
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//class LineString;
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}
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namespace planargraph {
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class Node;
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}
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namespace operation {
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namespace polygonize {
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class EdgeRing;
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}
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}
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}
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namespace geos {
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namespace operation { // geos::operation
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namespace polygonize { // geos::operation::polygonize
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/** \brief
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* A DirectedEdge of a PolygonizeGraph, which represents
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* an edge of a polygon formed by the graph.
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*
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* May be logically deleted from the graph by setting the
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* <code>marked</code> flag.
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*/
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class GEOS_DLL PolygonizeDirectedEdge: public planargraph::DirectedEdge {
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private:
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EdgeRing* edgeRing;
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PolygonizeDirectedEdge* next;
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long label;
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public:
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/*
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* \brief
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* Constructs a directed edge connecting the <code>from</code> node
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* to the <code>to</code> node.
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*
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* @param directionPt
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* specifies this DirectedEdge's direction (given by an imaginary
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* line from the <code>from</code> node to <code>directionPt</code>)
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*
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* @param edgeDirection
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* whether this DirectedEdge's direction is the same as or
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* opposite to that of the parent Edge (if any)
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*/
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PolygonizeDirectedEdge(planargraph::Node* newFrom,
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planargraph::Node* newTo,
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const geom::Coordinate& newDirectionPt,
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bool nEdgeDirection);
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/*
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* Returns the identifier attached to this directed edge.
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*/
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long getLabel() const;
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/*
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* Attaches an identifier to this directed edge.
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*/
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void setLabel(long newLabel);
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/*
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* Returns the next directed edge in the EdgeRing that this
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* directed edge is a member of.
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*/
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PolygonizeDirectedEdge* getNext() const;
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/*
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* Gets the EdgeRing this edge is a member of.
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*/
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EdgeRing* getRing() const {
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return edgeRing;
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}
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/*
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* Sets the next directed edge in the EdgeRing that this
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* directed edge is a member of.
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*/
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void setNext(PolygonizeDirectedEdge* newNext);
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/*
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* Returns the ring of directed edges that this directed edge is
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* a member of, or null if the ring has not been set.
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* @see #setRing(EdgeRing)
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*/
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bool isInRing() const;
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/*
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* Sets the ring of directed edges that this directed edge is
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* a member of.
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*/
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void setRing(EdgeRing* newEdgeRing);
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};
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} // namespace geos::operation::polygonize
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} // namespace geos::operation
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} // namespace geos
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