root / trunk / libraries / libTopology / src / org / gvsig / jts / SnapCoordinateList.java @ 23048
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/*
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* Created on 19-sep-2007
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*
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* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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/* CVS MESSAGES:
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*
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* $Id: SnapCoordinateList.java 23048 2008-09-01 15:06:47Z azabala $
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* $Log: SnapCoordinateList.java,v $
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* Revision 1.1 2007/09/19 16:37:49 azabala
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* first version in cvs
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*
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*
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*/
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package org.gvsig.jts; |
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import com.vividsolutions.jts.algorithms.SnapCGAlgorithms; |
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import com.vividsolutions.jts.geom.Coordinate; |
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import com.vividsolutions.jts.geom.CoordinateList; |
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/**
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* JTS coordinate list that uses snap to avoid consecutives coordinates at a
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* distance lower than the cluster tolerance.
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*
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*
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* FIXME There could be coordinates non consecutives at a distance slower than
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* snap tolerance.
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*
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* @author azabala
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*
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*/
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public class SnapCoordinateList extends CoordinateList { |
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private static final long serialVersionUID = 8784078431309170433L; |
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private double snapTolerance; |
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public SnapCoordinateList(double snapTolerance) { |
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super();
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this.snapTolerance = snapTolerance;
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} |
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public SnapCoordinateList(Coordinate[] coord, double snapTolerance) { |
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super();
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this.snapTolerance = snapTolerance;
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add(coord, false);//by default doesnt allow repeated coords |
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} |
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public SnapCoordinateList(Coordinate[] coord, |
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double snapTolerance,
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boolean allowRepeated) {
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super();
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this.snapTolerance = snapTolerance;
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add(coord, allowRepeated); |
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} |
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/**
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* Add a coordinate
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*
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* @param coord
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* The coordinates
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* @param allowRepeated
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* if set to false, repeated coordinates are collapsed
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*/
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public void add(Coordinate coord, boolean allowRepeated) { |
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// don't add duplicate coordinates
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if (!allowRepeated) {
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// with this code we only filter consecutive snapped points
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// if (size() >= 1) {
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// Coordinate last = (Coordinate) get(size() - 1);
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// if(SnapCGAlgorithms.snapEquals2D(last, coord, snapTolerance))
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// return;
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// }//if
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int size = size();
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/*
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If size == 1, we check the existing point,
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if size > 1, we dont check the first point (because closed geometries
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musnt snap the first and last point
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* */
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if(size > 1){ |
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for(int i = 1; i < size; i++){ |
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Coordinate coordinate = (Coordinate) get(i); |
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if(SnapCGAlgorithms.snapEquals2D(coordinate, coord, snapTolerance))
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return;
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} |
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}else if(size == 1){ |
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Coordinate last = (Coordinate) get(0);
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if(SnapCGAlgorithms.snapEquals2D(last, coord, snapTolerance))
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return;
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} |
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}//if
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super.add(coord);
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} |
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} |