com.vividsolutions.jts.noding.SimpleNoder Maven / Gradle / Ivy
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/*
* The JTS Topology Suite is a collection of Java classes that
* implement the fundamental operations required to validate a given
* geo-spatial data set to a known topological specification.
*
* Copyright (C) 2001 Vivid Solutions
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* For more information, contact:
*
* Vivid Solutions
* Suite #1A
* 2328 Government Street
* Victoria BC V8T 5G5
* Canada
*
* (250)385-6040
* www.vividsolutions.com
*/
package com.vividsolutions.jts.noding;
import java.util.*;
import com.vividsolutions.jts.geom.*;
/**
* Nodes a set of {@link SegmentString}s by
* performing a brute-force comparison of every segment to every other one.
* This has n^2 performance, so is too slow for use on large numbers
* of segments.
*
* @version 1.7
*/
public class SimpleNoder
extends SinglePassNoder
{
private Collection nodedSegStrings;
public SimpleNoder() {
}
public Collection getNodedSubstrings()
{
return NodedSegmentString.getNodedSubstrings(nodedSegStrings);
}
public void computeNodes(Collection inputSegStrings)
{
this.nodedSegStrings = inputSegStrings;
for (Iterator i0 = inputSegStrings.iterator(); i0.hasNext(); ) {
SegmentString edge0 = (SegmentString) i0.next();
for (Iterator i1 = inputSegStrings.iterator(); i1.hasNext(); ) {
SegmentString edge1 = (SegmentString) i1.next();
computeIntersects(edge0, edge1);
}
}
}
private void computeIntersects(SegmentString e0, SegmentString e1)
{
Coordinate[] pts0 = e0.getCoordinates();
Coordinate[] pts1 = e1.getCoordinates();
for (int i0 = 0; i0 < pts0.length - 1; i0++) {
for (int i1 = 0; i1 < pts1.length - 1; i1++) {
segInt.processIntersections(e0, i0, e1, i1);
}
}
}
}