Application: gvSIG desktop

/*

 * Cresques Mapping Suite. Graphic Library for constructing mapping applications.

 * 

 * Copyright (C) 2004-5. 

 *

 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 * 

 * cresques@gmail.com

 */

package org.cresques.geo;

import java.awt.Graphics2D;

import java.awt.geom.GeneralPath;

import java.awt.geom.Point2D;

import java.util.Iterator;

import java.util.Vector;

/**

 * Clase que representa un pol?gono 2D

 * @author "Luis W. Sevilla" <sevilla_lui@gva.es>

 */

public class Polygon2D extends Vector {

        GeneralPath gp = null;

        public Polygon2D() {

                super();

                gp = null;

        }

        /**

         * A?ade un vertice al po??gono

         * @param pt        punto 2D que representa el vertice a?adido

         */

        public void addPoint(Point2D pt) {super.add(pt);}

        /**

         * Dibuja el pol?gono

         * @param g        Graphics sobre el que dibuja 

         * @param vp        ViewPort con la vista

         */

        public void draw(Graphics2D g, ViewPortData vp) {

                newGP(vp);

                g.draw(gp);

                //g.draw(new Line2D.Double(pt,pt0));

        }

        /**

         * 

         * @param g

         * @param vp

         */

        public void fill(Graphics2D g, ViewPortData vp) {

                newGP(vp);

                g.fill(gp);

        }

        /**

         * 

         * @param vp

         */

        private void newGP(ViewPortData vp) {

                //if (gp != null) return;

                gp = new GeneralPath();

                Point2D pt0 = null, pt=null, pt1=null;

                Point2D.Double ptTmp = new Point2D.Double(0.0, 0.0);

                Iterator iter = iterator();

                while (iter.hasNext()) {

                        pt1 = (Point2D) iter.next();

                        vp.mat.transform(pt1, ptTmp);

                        if (pt0 == null) { 

                                pt0 = ptTmp;

                                gp.moveTo((float)ptTmp.getX(), (float)ptTmp.getY());

                        } else {

                                gp.lineTo((float)ptTmp.getX(), (float)ptTmp.getY());

                        }

                }

                gp.closePath();

        }

}