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.GeometryException;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

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

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

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

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

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

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

import org.gvsig.tools.locator.LocatorException;

/**

 * @author llmarques

 *

 */

public class SplineSplitLineOperation implements SplitLineOperation {

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

        throws LocatorException,

        GeometryOperationNotSupportedException, GeometryOperationException, GeometryException {

        Spline splineToSplit = (Spline) geometry;

        Line lineToSplit = (Line) ((Spline) geometry).toLines().getPrimitiveAt(0);

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

        GeometryManager geoManager = GeometryLocator.getGeometryManager();

        Spline splittedLine1 =

            (Spline) GeometryLocator.getGeometryManager().create(Geometry.TYPES.SPLINE, subtype);

        int index = 0;

        Point originalVertex = splineToSplit.getVertex(index);

        int pointer = 0;

        for (; pointer < lineToSplit.getNumVertices() - 1; pointer++) {

            Point vertex = lineToSplit.getVertex(pointer);

            if(vertex.equals(originalVertex)){

                splittedLine1.addVertex(vertex);

                index++;

                originalVertex = splineToSplit.getVertex(index);

            }

            Curve segment = geoManager.createLine(subtype);

            segment.setPoints(lineToSplit.getVertex(pointer),

                lineToSplit.getVertex(pointer + 1));

            if (SplitLineOperationUtils.intersects(segment, projectedPoint)) {

                splittedLine1.addVertex(projectedPoint);

                pointer++;

                break;

            }

        }

        Spline splittedLine2 =

            (Spline) GeometryLocator.getGeometryManager().create(Geometry.TYPES.SPLINE, subtype);

        splittedLine2.addVertex(projectedPoint);

        for (; index < splineToSplit.getNumVertices(); index++) {

            splittedLine2.addVertex(splineToSplit.getVertex(index));

        }

        return new Curve[] { splittedLine1, splittedLine2 };

    }

}