| gvSIG desktop 1

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2007 IVER T.I. and Generalitat Valenciana.

 *

 * 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.

 */

package org.gvsig.raster.beans.canvas.layers.functions;

import java.awt.Color;

import java.awt.Graphics;

import org.gvsig.raster.beans.canvas.GCanvas;

/**

 * Representa una linea con incremento exponencial.

 *

 * 14-oct-2007

 * @author Nacho Brodin (nachobrodin@gmail.com)

 */

public class ExponentialLine extends BaseFunction {

        int[]                    xPoints = null;

        int[]                    yPoints = null;

        /**

         * Constructor. Asigna el color

         * @param c

         */

        public ExponentialLine(Color c) {

                setColor(c);

        }

        /*

         *  (non-Javadoc)

         * @see org.gvsig.gui.beans.canvas.DrawableElement#firstDraw()

         */

        public void firstDrawActions() {

                xPoints = new int[canvas.getCanvasWidth()];

                yPoints = new int[canvas.getCanvasHeight()];

                double pos = Math.log(canvas.getCanvasMinY());

                double max = Math.log(canvas.getCanvasMaxY());

                double increase =  (max - pos) / canvas.getCanvasHeight();

                for (int i = canvas.getCanvasMinY(); i < canvas.getCanvasMaxY(); i++) {

                        try {

                        //yPoints[i] = value - (int)(value * Math.exp((double)i / 64) / Math.exp(3));

                        yPoints[i - canvas.getCanvasMinY()] = canvas.getCanvasHeight() - (int)Math.round(Math.exp(pos));

                        xPoints[i - canvas.getCanvasMinX()] = i;

                        //System.out.println(xPoints[i] + " " + yPoints[i]);

                        //System.out.println(Math.exp((double)i/85));

                        System.out.println(xPoints[i - canvas.getCanvasMinX()] + " : " + pos + " : " + yPoints[i - canvas.getCanvasMinY()]);

                        pos += increase;

                        } catch(ArrayIndexOutOfBoundsException e) {}

                }

        }

        /**

         * Dibujado de la l?nea de incremento exponencial sobre el canvas.

         */

        protected void paint(Graphics g) {

                g.setColor(color);

                g.drawPolyline(xPoints, yPoints, xPoints.length);

        }

        /**

         * Asigna el objeto JComponent donde se pintan los elementos. Inicializa los puntos

         * de inicio y fin de l?nea y asigna los listener

         * @param canvas

         */

        public void setCanvas(GCanvas canvas) {

                super.setCanvas(canvas);

        }

        public void firstActions() {}

}