/*
* 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.triangulate;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.triangulate.quadedge.Vertex;
/**
* A vertex in a Constrained Delaunay Triangulation.
* The vertex may or may not lie on a constraint.
* If it does it may carry extra information fragment_about the original constraint.
*
* @author Martin Davis
*/
public class ConstraintVertex extends Vertex {
private boolean isOnConstraint;
private Object constraint = null;
/**
* Creates a new constraint vertex
*
* @param p the location of the vertex
*/
public ConstraintVertex(Coordinate p) {
super(p);
}
/**
* Sets whether this vertex lies on a constraint.
*
* @param isOnConstraint true if this vertex lies on a constraint
*/
public void setOnConstraint(boolean isOnConstraint) {
this.isOnConstraint = isOnConstraint;
}
/**
* Tests whether this vertex lies on a constraint.
*
* @return true if the vertex lies on a constraint
*/
public boolean isOnConstraint() {
return isOnConstraint;
}
/**
* Sets the external constraint information
*
* @param constraint an object which carries information fragment_about the constraint this vertex lies on
*/
public void setConstraint(Object constraint) {
isOnConstraint = true;
this.constraint = constraint;
}
/**
* Gets the external constraint object
*
* @return the external constraint object
*/
public Object getConstraint() {
return constraint;
}
/**
* Merges the constraint data in the vertex <tt>other</tt> into this vertex.
* This method is called when an inserted vertex is
* very close to an existing vertex in the triangulation.
*
* @param other the constraint vertex to merge
*/
protected void merge(ConstraintVertex other) {
if (other.isOnConstraint) {
isOnConstraint = true;
constraint = other.constraint;
}
}
}