Application: gvSIG desktop » gvSIG tools: Vector editing

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright ? 2007-2015 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.extendline.operation;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.feature.FeatureSelection;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.Geometry.TYPES;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.GeometryUtils;

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 ArcExtendLineOperation implements ExtendLineOperation {

    public Curve extendLine(Curve lineToExtend, Point insertedPoint,

            FeatureSelection boundaryObjects)

            throws GeometryOperationNotSupportedException,

            GeometryOperationException, DataException, CreateGeometryException {

        Arc arcToBeExtend = (Arc) lineToExtend;

        GeometryManager geoManager = GeometryLocator.getGeometryManager();

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

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

        Point startVertex = arcToBeExtend.getInitPoint();

        Point endVertex = arcToBeExtend.getEndPoint();

        Point startIntersectionPoint = null;

        Point endIntersectionPoint = null;

        if (insertedPoint.distance(startVertex) < insertedPoint

                .distance(endVertex)) {

            startIntersectionPoint

                    = ExtendLineOperationUtils.arcIntersection(arcToBeExtend,

                            ExtendLineOperationUtils.START_SIDE, boundaryObjects);

        } else {

            endIntersectionPoint

                    = ExtendLineOperationUtils.arcIntersection(arcToBeExtend,

                            ExtendLineOperationUtils.END_SIDE, boundaryObjects);

        }

        if (startIntersectionPoint == null) {

            startIntersectionPoint = arcToBeExtend.getInitPoint();

        }

        if (endIntersectionPoint == null) {

            endIntersectionPoint = arcToBeExtend.getEndPoint();

        }

        Point center = arcToBeExtend.getCenterPoint();

        double radius = center.distance(arcToBeExtend.getInitPoint());

        double startAngle

                = GeometryUtils.calculateAngle(center, startIntersectionPoint);

        double endAngle

                = GeometryUtils.calculateAngle(center, endIntersectionPoint);

        extendedArc.setPointsStartEnd(center, radius, startAngle, endAngle);

        return extendedArc;

    }

    @Override

    public Curve extendLine(Curve lineToExtend, Point insertedPoint,

            Geometry boundaryObject)

            throws GeometryOperationNotSupportedException,

            GeometryOperationException, DataException, CreateGeometryException {

        Arc arcToBeExtend = (Arc) lineToExtend;

        GeometryManager geoManager = GeometryLocator.getGeometryManager();

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

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

        Point startVertex = arcToBeExtend.getInitPoint();

        Point endVertex = arcToBeExtend.getEndPoint();

        Point midVertex = arcToBeExtend.getMiddlePoint();

        Point startIntersectionPoint = null;

        Point endIntersectionPoint = null;

        if (insertedPoint.distance(startVertex) < insertedPoint

                .distance(endVertex)) {

            startIntersectionPoint

                    = ExtendLineOperationUtils.arcIntersection(arcToBeExtend,

                            ExtendLineOperationUtils.START_SIDE, boundaryObject);

        } else {

            endIntersectionPoint

                    = ExtendLineOperationUtils.arcIntersection(arcToBeExtend,

                            ExtendLineOperationUtils.END_SIDE, boundaryObject);

        }

        if (startIntersectionPoint == null) {

            startIntersectionPoint = arcToBeExtend.getInitPoint();

        }

        if (endIntersectionPoint == null) {

            endIntersectionPoint = arcToBeExtend.getEndPoint();

        }

          extendedArc.setPoints(startIntersectionPoint, midVertex, endIntersectionPoint);

        return extendedArc;

    }

}