Application: gvSIG desktop

/* 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.fmap.geom.jts.primitive.curve.arc;

import java.awt.geom.PathIterator;

import com.vividsolutions.jts.geom.Coordinate;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.jts.primitive.point.Point2D;

import org.gvsig.fmap.geom.jts.primitive.point.PointJTS;

import org.gvsig.fmap.geom.jts.util.ArrayListCoordinateSequence;

import org.gvsig.fmap.geom.jts.util.JTSUtils;

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

/**

 * @author fdiaz

 *

 */

public class Arc2D extends AbstractArc {

    /**

     *

     */

    private static final long serialVersionUID = 3414562338763885954L;

    /**

     * @param subtype

     */

    protected Arc2D() {

        super(Geometry.SUBTYPES.GEOM2D);

    }

    /* (non-Javadoc)

     * @see org.gvsig.fmap.geom.primitive.Arc#setPoints(org.gvsig.fmap.geom.primitive.Point, double, double, double)

     */

    public void setPoints(Point center, double radius, double startAngle, double angleExt) {

        double x;

        double y;

        double w;

        double h;

        double start;

        double extent;

        double angleOffset;

        final double pi2 = Math.PI*2;

        angleOffset = 0;

        if( angleExt<0 ) {

            angleOffset = pi2 + angleExt;

            angleExt = Math.abs(angleExt);

        }

        x = center.getX() - radius;

        y = center.getY() - radius;

        w = radius * 2;

        h = w; // Son siempre arcos de circunferencia

        if( angleExt > 0 && (angleExt % pi2) == 0  ) {

            start = 0;

            extent = 360;

        } else {

            angleExt = angleExt % pi2; //Asumimos que aqui angleExt es siempre positivo

            startAngle = Math.abs(startAngle) % pi2;

            start = Math.toDegrees( pi2 - startAngle + angleOffset) ;

            extent = - Math.toDegrees(pi2 - angleExt);

        }

        double angleStart = Math.toRadians(-start);

        double initX = x + (Math.cos(angleStart) * 0.5 + 0.5) * radius*2;

        double initY = y + (Math.sin(angleStart) * 0.5 + 0.5) * radius*2;

        init = new Point2D(initX, initY);

        double angleEnd = Math.toRadians(-start - extent);

        double endX = x + (Math.cos(angleEnd) * 0.5 + 0.5) * radius*2;

        double endY = y + (Math.sin(angleEnd) * 0.5 + 0.5) * radius*2;

        end =  new Point2D(endX, endY);

        double angleMiddle = Math.toRadians(-start - extent)/2;

        double middleX = x + (Math.cos(angleMiddle) * 0.5 + 0.5) * radius*2;

        double middleY = y + (Math.sin(angleMiddle) * 0.5 + 0.5) * radius*2;

        end =  new Point2D(middleX, middleY);

}

    /* (non-Javadoc)

     * @see org.gvsig.fmap.geom.primitive.Arc#getCenterPoint()

     */

    public Point getCenterPoint() {

        ((PointJTS)init).getJTS();

        Point2D center = new Point2D(JTSUtils.getCircumcentre(init, middle, end));

        return center;

    }

    /* (non-Javadoc)

     * @see org.gvsig.fmap.geom.Geometry#cloneGeometry()

     */

    public Geometry cloneGeometry() {

        Arc2D arc2D = new Arc2D();

        arc2D.setPoints(init, middle, end);

        return arc2D;

    }

    /*

     * (non-Javadoc)

     *

     * @see

     * org.gvsig.fmap.geom.jts.primitive.curve.line.AbstractLine#fixPoint(org

     * .gvsig.fmap.geom.primitive.Point)

     */

    @Override

    protected Point fixPoint(Point point) {

        if (point instanceof Point2D) {

            return point;

        } else {

            return new Point2D(point.getX(), point.getY());

        }

    }

    /* (non-Javadoc)

     * @see org.gvsig.fmap.geom.jts.GeometryJTS#getJTS()

     */

    public com.vividsolutions.jts.geom.Geometry getJTS() {

        PathIterator pi = getPathIterator(null);

        ArrayListCoordinateSequence coordinates = new ArrayListCoordinateSequence();

        double coords[] = new double[6];

        while (!pi.isDone()) {

            switch (pi.currentSegment(coords)) {

            case PathIterator.SEG_MOVETO:

                coordinates.add(new Coordinate(coords[0], coords[1]));

                break;

            case PathIterator.SEG_LINETO:

                coordinates.add(new Coordinate(coords[0], coords[1]));

                break;

            case PathIterator.SEG_QUADTO:

                coordinates.add(new Coordinate(coords[0], coords[1]));

                coordinates.add(new Coordinate(coords[2], coords[3]));

                break;

            case PathIterator.SEG_CUBICTO:

                coordinates.add(new Coordinate(coords[0], coords[1]));

                coordinates.add(new Coordinate(coords[2], coords[3]));

                coordinates.add(new Coordinate(coords[4], coords[5]));

                break;

            case PathIterator.SEG_CLOSE:

                coordinates.add(coordinates.get(0));

                break;

            }

            pi.next();

        }

        return JTSUtils.createJTSLinearRing(coordinates);

    }

}