Application: gvSIG desktop » gvSIG tools: Vector editing

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright ? 2007-2014 gvSIG Association

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.vectorediting.lib.prov.splitline.operation;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.exception.CreateGeometryException;

import org.gvsig.fmap.geom.operation.GeometryOperationException;

import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException;

import org.gvsig.fmap.geom.primitive.Arc;

import org.gvsig.fmap.geom.primitive.Curve;

import org.gvsig.fmap.geom.primitive.Point;

/**

 * @author llmarques

 *

 */

public class ArcSplitLineOperation implements SplitLineOperation {

    public Curve[] split(Geometry geometry, Point projectedPoint)

        throws CreateGeometryException, GeometryOperationNotSupportedException,

        GeometryOperationException {

        GeometryManager geoManager = GeometryLocator.getGeometryManager();

        int subtype = geometry.getGeometryType().getSubType();

        Arc arcToSplit = (Arc) geometry;

        Point center = arcToSplit.getCenterPoint();

        //Si center es null es porque dos de los puntos coinciden.

        if(arcToSplit.getInitPoint().equals(arcToSplit.getEndPoint())){

            //Si son el inicial y el final es porque es una circunferencia completa, tomamos como "center" el centro del Envelope

            if (center==null){

                center = geoManager.createPoint(arcToSplit.getEnvelope().getCenter(0), arcToSplit.getEnvelope().getCenter(1), subtype);

            }

        }

        Point firstPoint = arcToSplit.getInitPoint();

        Point endPoint = arcToSplit.getEndPoint();

        double startAngle =

            SplitLineOperationUtils.getAngle(center, firstPoint);

        double splitAngle =

            SplitLineOperationUtils.getAngle(center, projectedPoint);

        double endAngle = SplitLineOperationUtils.getAngle(center, endPoint);

        double radius = center.distance(firstPoint);

        Arc arcSplitted1 = (Arc) geoManager.create(Geometry.TYPES.ARC, subtype);

        Arc arcSplitted2 = (Arc) geoManager.create(Geometry.TYPES.ARC, subtype);

        arcSplitted1.setPointsStartEnd(center, radius, startAngle, splitAngle);

        arcSplitted2.setPointsStartEnd(center, radius, splitAngle, endAngle);

        return new Curve[] { arcSplitted1, arcSplitted2 };

    }

}