svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.geometry / org.gvsig.fmap.geometry.impl / src / main / java / org / gvsig / fmap / geom / aggregate / impl / MultiSurface2D.java @ 41590
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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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 3
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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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.fmap.geom.aggregate.impl; |
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import java.util.ArrayList; |
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import java.util.List; |
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import com.vividsolutions.jts.geom.GeometryFactory; |
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import com.vividsolutions.jts.geom.LineString; |
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import com.vividsolutions.jts.geom.LinearRing; |
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import com.vividsolutions.jts.geom.MultiPolygon; |
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import com.vividsolutions.jts.geom.Polygon; |
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import com.vividsolutions.jts.geom.PrecisionModel; |
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import com.vividsolutions.jts.geom.TopologyException; |
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import com.vividsolutions.jts.precision.GeometryPrecisionReducer; |
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import org.cresques.cts.IProjection; |
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import org.gvsig.fmap.geom.Geometry; |
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import org.gvsig.fmap.geom.aggregate.MultiSurface; |
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import org.gvsig.fmap.geom.exception.CreateGeometryException; |
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import org.gvsig.fmap.geom.operation.GeometryOperationException; |
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import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException; |
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import org.gvsig.fmap.geom.primitive.Primitive; |
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import org.gvsig.fmap.geom.primitive.Surface; |
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import org.gvsig.fmap.geom.primitive.impl.surface.polygon.Polygon2D; |
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import org.gvsig.fmap.geom.type.GeometryType; |
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import org.gvsig.fmap.geom.util.Converter; |
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/**
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* @author Jorge Piera Llodr? (jorge.piera@iver.es)
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*/
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public class MultiSurface2D extends BaseMultiPrimitive implements MultiSurface { |
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private static final long serialVersionUID = 625054010696136925L; |
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/**
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* The constructor with the GeometryType like and argument
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* is used by the {@link GeometryType}{@link #create()}
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* to create the geometry
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* @param type
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* The geometry type
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*/
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public MultiSurface2D(GeometryType geomType) {
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super(geomType);
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} |
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MultiSurface2D(GeometryType geomType, String id, IProjection projection) {
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super(geomType, id, projection);
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} |
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MultiSurface2D(GeometryType geomType, String id, IProjection projection,
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Polygon2D[] polygons) {
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super(geomType, id, projection, polygons);
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} |
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/*
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* (non-Javadoc)
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*
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* @see com.iver.cit.gvsig.fmap.core.FGeometryCollection#cloneGeometry()
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*/
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public Geometry cloneGeometry() {
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MultiSurface2D auxSurface = new MultiSurface2D(geometryType, id, projection);
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for (int i = 0; i < getPrimitivesNumber(); i++) { |
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auxSurface.addSurface((Surface)((Surface) geometries.get(i)).cloneGeometry()); |
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} |
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return auxSurface;
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} |
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/* (non-Javadoc)
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* @see org.gvsig.fmap.geom.aggregate.MultiSurface#addSurface(org.gvsig.fmap.geom.primitive.Surface)
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*/
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public void addSurface(Surface surface) { |
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geometries.add(surface); |
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} |
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public void addPrimitive(Primitive primitive) { |
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addSurface((Surface)primitive); |
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} |
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/* (non-Javadoc)
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* @see org.gvsig.fmap.geom.aggregate.MultiSurface#getSurfaceAt(int)
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*/
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public Surface getSurfaceAt(int index) { |
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return (Surface)getPrimitiveAt(index);
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} |
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public Geometry union(Geometry other)
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throws GeometryOperationNotSupportedException,
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GeometryOperationException { |
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com.vividsolutions.jts.geom.Geometry this_jts, other_jts, union_jts; |
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Geometry resp = null;
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try {
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this_jts = getJTS(); |
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other_jts = Converter.geometryToJts(other); |
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union_jts = this_jts.union(other_jts); |
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if (union_jts instanceof Polygon) { |
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double tole = union_jts.getArea();
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tole = tole * 1e-12;
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union_jts = removeInvalidHoles((Polygon) union_jts, tole);
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} else {
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if (union_jts instanceof MultiPolygon) { |
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double tole = union_jts.getArea();
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tole = tole * 1e-12;
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union_jts = |
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removeInvalidHoles((MultiPolygon) union_jts, tole); |
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} |
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} |
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resp = Converter.jtsToGeometry(union_jts); |
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return resp;
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} catch (CreateGeometryException e) {
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throw new GeometryOperationException(e); |
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} catch (TopologyException e) {
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/*
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* If JTS throws this, we'll try to simplify them
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*/
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try {
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this_jts = getJTS(); |
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other_jts = Converter.geometryToJts(other); |
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PrecisionModel pm = new PrecisionModel(1000000); |
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GeometryPrecisionReducer gpr = new GeometryPrecisionReducer(pm);
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this_jts = gpr.reduce(this_jts); |
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other_jts = gpr.reduce(other_jts); |
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union_jts = this_jts.union(other_jts); |
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if (union_jts instanceof Polygon) { |
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double tole = union_jts.getArea();
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tole = tole * 1e-12;
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union_jts = removeInvalidHoles((Polygon) union_jts, tole);
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} else {
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if (union_jts instanceof MultiPolygon) { |
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double tole = union_jts.getArea();
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tole = tole * 1e-12;
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union_jts = |
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removeInvalidHoles((MultiPolygon) union_jts, tole); |
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} |
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} |
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resp = Converter.jtsToGeometry(union_jts); |
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return resp;
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} catch (Exception exc) { |
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throw new GeometryOperationException(exc); |
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} |
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} |
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} |
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private com.vividsolutions.jts.geom.Geometry getJTS() {
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return Converter.geometryToJts(this); |
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} |
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private MultiPolygon removeInvalidHoles(MultiPolygon mpo, double tol) { |
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GeometryFactory gf = new GeometryFactory(mpo.getPrecisionModel());
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int npo = mpo.getNumGeometries();
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Polygon[] pos = new Polygon[npo]; |
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for (int i=0; i<npo; i++) { |
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pos[i] = removeInvalidHoles((Polygon) mpo.getGeometryN(i), tol);
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} |
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return gf.createMultiPolygon(pos);
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} |
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private Polygon removeInvalidHoles(Polygon po, double tol) { |
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GeometryFactory gf = new GeometryFactory(po.getPrecisionModel());
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int nholes = po.getNumInteriorRing();
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List validholes = new ArrayList(); |
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for (int i=0; i<nholes; i++) { |
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LineString ls = po.getInteriorRingN(i); |
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LinearRing lr = toLinearRing(ls, gf); |
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if (getLinearRingArea(lr, gf) > tol) {
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validholes.add(lr); |
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} |
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} |
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if (validholes.size() < nholes) {
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LinearRing[] holes = (LinearRing[]) validholes.toArray(new LinearRing[0]); |
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return gf.createPolygon(
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toLinearRing(po.getExteriorRing(), gf), holes); |
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} else {
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return po;
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} |
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} |
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private double getLinearRingArea(LinearRing lr, GeometryFactory gf) { |
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Polygon po = gf.createPolygon(lr);
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double resp = po.getArea();
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return resp;
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} |
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private LinearRing toLinearRing(LineString ls, GeometryFactory gf) {
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return gf.createLinearRing(ls.getCoordinateSequence());
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} |
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} |