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.ring;

import java.awt.geom.AffineTransform;

import java.awt.geom.PathIterator;

import com.vividsolutions.jts.geom.Coordinate;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.jts.gputils.GeneralPathXIterator;

import org.gvsig.fmap.geom.jts.primitive.curve.line.Line3D;

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

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

/**

 * @author fdiaz

 *

 */

public class Ring3D extends Line3D implements Ring {

    /**

     *

     */

    private static final long serialVersionUID = 9116088317343114306L;

    /**

     */

    protected Ring3D() {

        super();

    }

    /**

     * @param coordinates

     */

    public Ring3D(Coordinate[] coordinates) {

        super(coordinates);

    }

    /* (non-Javadoc)

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

     */

    public Geometry cloneGeometry() {

        return new Ring3D((Coordinate[]) coordinates.clone());

    }

    /*

     * (non-Javadoc)

     *

     * @see

     * org.gvsig.fmap.geom.Geometry#getPathIterator(java.awt.geom.AffineTransform

     * )

     */

    public PathIterator getPathIterator(AffineTransform at) {

        RingIterator pi = new RingIterator(at);

        return pi;

    }

    private class RingIterator extends GeneralPathXIterator {

        /** Transform applied on the coordinates during iteration */

        private AffineTransform at;

        /** True when the point has been read once */

        private boolean done;

        private int index = 0;

        /**

         * Creates a new PointIterator object.

         *

         * @param p

         *            The polygon

         * @param at

         *            The affine transform applied to coordinates during

         *            iteration

         */

        public RingIterator(AffineTransform at) {

            super(new GeneralPathX());

            if (at == null) {

                at = new AffineTransform();

            }

            this.at = at;

            done = false;

        }

        /**

         * Return the winding rule for determining the interior of the path.

         *

         * @return <code>WIND_EVEN_ODD</code> by default.

         */

        public int getWindingRule() {

            return PathIterator.WIND_EVEN_ODD;

        }

        /**

         * @see java.awt.geom.PathIterator#next()

         */

        public void next() {

            if(isClosed()){

                done = (coordinates.size() == index++);

            } else {

                done = ((coordinates.size()+1) == index++);

            }

        }

        /**

         * @see java.awt.geom.PathIterator#isDone()

         */

        public boolean isDone() {

            return done;

        }

        /**

         * @see java.awt.geom.PathIterator#currentSegment(double[])

         */

        public int currentSegment(double[] coords) {

            if(!isClosed() && index==coordinates.size()){

                coords[0] = coordinates.getX(0);

                coords[1] = coordinates.getY(0);

                at.transform(coords, 0, coords, 0, 1);

                return PathIterator.SEG_LINETO;

            }

            coords[0] = coordinates.getX(index);

            coords[1] = coordinates.getY(index);

            at.transform(coords, 0, coords, 0, 1);

            if (index == 0) {

                return PathIterator.SEG_MOVETO;

            } else {

                return PathIterator.SEG_LINETO;

            }

        }

        /*

         * (non-Javadoc)

         *

         * @see java.awt.geom.PathIterator#currentSegment(float[])

         */

        public int currentSegment(float[] coords) {

            if(!isClosed() && index==coordinates.size()){

                coords[0] = (float) coordinates.getX(0);

                coords[1] = (float) coordinates.getY(0);

                at.transform(coords, 0, coords, 0, 1);

                return PathIterator.SEG_LINETO;

            }

            coords[0] = (float) coordinates.getX(index);

            coords[1] = (float) coordinates.getY(index);

            at.transform(coords, 0, coords, 0, 1);

            if (index == 0) {

                return PathIterator.SEG_MOVETO;

            } else {

                return PathIterator.SEG_LINETO;

            }

        }

    }

}