/*
* 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.io.PrintStream;
import com.vividsolutions.jts.geom.Coordinate;
/**
* Represents an intersection point between two {@link SegmentString}s.
*
* @version 1.7
*/
public class SegmentNode
implements Comparable
{
private final NodedSegmentString segString;
public final Coordinate coord; // the point of intersection
public final int segmentIndex; // the index of the containing line segment in the parent edge
private final int segmentOctant;
private final boolean isInterior;
public SegmentNode(NodedSegmentString segString, Coordinate coord, int segmentIndex, int segmentOctant) {
this.segString = segString;
this.coord = new Coordinate(coord);
this.segmentIndex = segmentIndex;
this.segmentOctant = segmentOctant;
isInterior = ! coord.equals2D(segString.getCoordinate(segmentIndex));
}
public boolean isInterior() { return isInterior; }
public boolean isEndPoint(int maxSegmentIndex)
{
if (segmentIndex == 0 && ! isInterior) return true;
if (segmentIndex == maxSegmentIndex) return true;
return false;
}
/**
* @return -1 this SegmentNode is located before the argument location
* @return 0 this SegmentNode is at the argument location
* @return 1 this SegmentNode is located after the argument location
*/
public int compareTo(Object obj)
{
SegmentNode other = (SegmentNode) obj;
if (segmentIndex < other.segmentIndex) return -1;
if (segmentIndex > other.segmentIndex) return 1;
if (coord.equals2D(other.coord)) return 0;
return SegmentPointComparator.compare(segmentOctant, coord, other.coord);
//return segment.compareNodePosition(this, other);
}
public void print(PrintStream out)
{
out.print(coord);
out.print(" seg # = " + segmentIndex);
}
}