Application: gvSIG desktop

/*

 * Created on 03-oct-2006

 *

 * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

*

* $Id: SnappingOverlayOperationTest.java 9178 2006-12-04 19:30:23Z azabala $

* $Log$

* Revision 1.1  2006-12-04 19:30:23  azabala

* *** empty log message ***

*

* Revision 1.1  2006/10/19 16:06:48  azabala

* *** empty log message ***

*

* Revision 1.1  2006/10/17 18:25:53  azabala

* *** empty log message ***

*

* Revision 1.3  2006/10/10 18:50:57  azabala

* *** empty log message ***

*

* Revision 1.2  2006/10/09 19:10:56  azabala

* First version in CVS

*

* Revision 1.1  2006/10/05 19:20:57  azabala

* first version in cvs

*

*

*/

package com.vividsolutions.jts.operation.overlay;

import junit.framework.TestCase;

import com.vividsolutions.jts.geom.Coordinate;

import com.vividsolutions.jts.geom.Geometry;

import com.vividsolutions.jts.geom.GeometryCollection;

import com.vividsolutions.jts.geom.GeometryFactory;

import com.vividsolutions.jts.geom.Polygon;

import com.vividsolutions.jts.operation.overlay.OverlayOp;

public class SnappingOverlayOperationTest extends TestCase {

        //test 1

        Geometry a,b;

        GeometryFactory factory ;

        com.vividsolutions.jts.io.WKTReader reader;

        //test 2

        Geometry c,d;

        //test 4

        Geometry f;

        //test 5

        Geometry g, h;

        //test 6

        Geometry pol1, pol2;

        public static void main(String[] args) {

        }

        public SnappingOverlayOperationTest(String name) {

                super(name);

        }

        protected void setUp() throws Exception {

                super.setUp();

                factory = new GeometryFactory();

                reader = new com.vividsolutions.jts.io.WKTReader(factory);

                a = reader.read("LINESTRING(0.001 0.001, 5.001 5.001)");

                b = reader.read("LINESTRING(2.1 -3, 0.0 -0.001, -2.22 4.88, 10.0 10.0, 5.002 5.002)");

                c = reader.read("LINESTRING(0 0, 5 0, 10 0.001)");

                d = reader.read("LINESTRING(0 0.01, 5 0.002, 10 0.002)");

                f = reader.read("LINESTRING(0 0.11, 5 0.12, 10 0.14)");

                g = reader.read("LINESTRING(1 0, 3 2)");

                h = reader.read("LINESTRING(3.05 2.01, 5 1.25, 0.25 1.75)");

                pol1 = reader.read("POLYGON((0 0, -5 0, -10 5, 0 10,  10 5, 5 0, 0 0))");

                pol2 = reader.read("POLYGON((10.01 0, 5 5, 5 10, 10 10, 10.01 0))");

        }

        protected void tearDown() throws Exception {

                super.tearDown();

                factory = null;

                reader = null;

                a = null;

                b = null;

        }

        /*

         * Test method for 'com.iver.cit.gvsig.fmap.topology.SnappingOverlayOperation.SnappingOverlayOperation(Geometry, Geometry, double)'

         */

        public void testSnappingOverlayOperation() {

                //test 1: dos lineas que intersectan en dos puntos: uno Nodo y otro vertice

                Geometry geom = SnappingOverlayOperation.overlayOp(a, b, 

                                                                        OverlayOp.INTERSECTION, 0.01);

                assertTrue(geom.toString().equals("MULTIPOINT (0.001 0.001, 5.001 5.001)"));

                //test 2: dos lineas paralelas separadas por una distancia inferior a la

                //de snap

                geom = SnappingOverlayOperation.overlayOp(c, d, 

                                OverlayOp.INTERSECTION, 0.1);

                assertTrue(geom.toString().equals("MULTILINESTRING ((0 0, 5 0), (5 0, 10 0.001))"));

                //test 3: identicas l?neas pero reducimos la distancia de snap

                geom = SnappingOverlayOperation.overlayOp(c, d, 

                                OverlayOp.INTERSECTION, 0.0001);

                assertTrue(geom.toString().equals("GEOMETRYCOLLECTION EMPTY"));

                //test 4: identicas l?neas, pero se separan un poco mas

                geom = SnappingOverlayOperation.overlayOp(c, f, OverlayOp.INTERSECTION, 0.1);

                assertTrue(geom.toString().equals("GEOMETRYCOLLECTION EMPTY"));

                //test 5: interseccion de dos lineas, la solucion son dos puntos:

                //uno con snap y el otro normal. Presentan cambios de orientacion

                geom = SnappingOverlayOperation.overlayOp(g, h, OverlayOp.INTERSECTION, 0.1);

                assertTrue(geom instanceof GeometryCollection);

                assertTrue(geom.toString().equals("MULTIPOINT (2.511904761904762 1.5119047619047619, 3 2)"));

                geom = SnappingOverlayOperation.overlayOp(pol1, 

                                                                                                  pol2, 

                                                                                        OverlayOp.INTERSECTION, 

                                                                                        0.01);

                assertTrue(geom instanceof Polygon);

                assertTrue(geom.toString().equals("POLYGON ((5 7.5, 10 5, 7.502497502497502 2.5024975024975022, 5 5, 5 7.5))"));

        }

}