RelateNode.java
/*
* Copyright (c) 2016 Vivid Solutions.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v20.html
* and the Eclipse Distribution License is available at
*
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.locationtech.jts.operation.relate;
import org.locationtech.jts.geom.Coordinate;
import org.locationtech.jts.geom.IntersectionMatrix;
import org.locationtech.jts.geomgraph.EdgeEndStar;
import org.locationtech.jts.geomgraph.Node;
/**
* Represents a node in the topological graph used to compute spatial relationships.
*
* @version 1.7
*/
public class RelateNode
extends Node
{
public RelateNode(Coordinate coord, EdgeEndStar edges)
{
super(coord, edges);
}
/**
* Update the IM with the contribution for this component.
* A component only contributes if it has a labelling for both parent geometries
*/
protected void computeIM(IntersectionMatrix im)
{
im.setAtLeastIfValid(label.getLocation(0), label.getLocation(1), 0);
}
/**
* Update the IM with the contribution for the EdgeEnds incident on this node.
*/
void updateIMFromEdges(IntersectionMatrix im)
{
((EdgeEndBundleStar) edges).updateIM(im);
}
}