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.impl.geo;

import java.awt.Graphics2D;

import java.awt.geom.GeneralPath;

import java.awt.geom.Point2D;

import java.util.Iterator;

import java.util.Vector;

import org.cresques.geo.ViewPortData;

/**

 * 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;

        Point2D pt = null;

        Point2D 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();

    }

}