Class EdgeEndBundleStar

1
2
3
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 java.util.Iterator;
18
19	import org.locationtech.jts.geom.IntersectionMatrix;
20	import org.locationtech.jts.geomgraph.EdgeEnd;
21	import org.locationtech.jts.geomgraph.EdgeEndStar;
22
23	/**
24	* An ordered list of {@link EdgeEndBundle}s around a {@link RelateNode}.
25	* They are maintained in CCW order (starting with the positive x-axis) around the node
26	* for efficient lookup and topology building.
27	*
28	* @version 1.7
29	*/
30	public class EdgeEndBundleStar
31	extends EdgeEndStar
32	{
33	/**
34	* Creates a new empty EdgeEndBundleStar
35	*/
36	public EdgeEndBundleStar() {
37	}
38
39	/**
40	* Insert a EdgeEnd in order in the list.
41	* If there is an existing EdgeStubBundle which is parallel, the EdgeEnd is
42	* added to the bundle. Otherwise, a new EdgeEndBundle is created
43	* to contain the EdgeEnd.
44	* <br>
45	*/
46	public void insert(EdgeEnd e)
47	{
48	EdgeEndBundle eb = (EdgeEndBundle) edgeMap.get(e);
49	if (eb == null) {
50	eb = new EdgeEndBundle(e);
51	insertEdgeEnd(e, eb);
52	}
53	else {
54	eb.insert(e);
55	}
56	}
57
58	/**
59	* Update the IM with the contribution for the EdgeStubs around the node.
60	*/
61	void updateIM(IntersectionMatrix im)
62	{
63	for (Iterator it = iterator(); it.hasNext(); ) {
64	EdgeEndBundle esb = (EdgeEndBundle) it.next();
65	esb.updateIM(im);
66	}
67	}
68
69	}
70