Class RelateNode

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4	/*
5	* Copyright (c) 2016 Vivid Solutions.
6	*
7	* All rights reserved. This program and the accompanying materials
8	* are made available under the terms of the Eclipse Public License 2.0
9	* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
10	* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v20.html
11	* and the Eclipse Distribution License is available at
12	*
13	* http://www.eclipse.org/org/documents/edl-v10.php.
14	*/
15	package org.locationtech.jts.operation.relate;
16
17	import org.locationtech.jts.geom.Coordinate;
18	import org.locationtech.jts.geom.IntersectionMatrix;
19	import org.locationtech.jts.geomgraph.EdgeEndStar;
20	import org.locationtech.jts.geomgraph.Node;
21
22	/**
23	* Represents a node in the topological graph used to compute spatial relationships.
24	*
25	* @version 1.7
26	*/
27	public class RelateNode
28	extends Node
29	{
30
31	public RelateNode(Coordinate coord, EdgeEndStar edges)
32	{
33	super(coord, edges);
34	}
35
36	/**
37	* Update the IM with the contribution for this component.
38	* A component only contributes if it has a labelling for both parent geometries
39	*/
40	protected void computeIM(IntersectionMatrix im)
41	{
42	im.setAtLeastIfValid(label.getLocation(0), label.getLocation(1), 0);
43	}
44	/**
45	* Update the IM with the contribution for the EdgeEnds incident on this node.
46	*/
47	void updateIMFromEdges(IntersectionMatrix im)
48	{
49	((EdgeEndBundleStar) edges).updateIM(im);
50	}
51
52	}
53