| gvSIG desktop 1

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

*

* Copyright (C) 2005 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 com.iver.cit.gvsig.animation.interpolator;

import java.awt.geom.Rectangle2D;

import java.util.List;

import com.iver.cit.gvsig.animation.keyFrame.KeyFrame2D;

import com.iver.cit.gvsig.animation.keyframe.IKeyFrame;

import com.iver.cit.gvsig.animation.keyframe.interpolator.IInterpolator;

import com.iver.cit.gvsig.animation.keyframe.interpolator.IInterpolatorTimeFuntion;

import com.iver.cit.gvsig.project.ProjectExtent;

import com.iver.utiles.XMLEntity;

/**

 * @author ?ngel Fraile Gri??n  e-mail: angel.fraile@iver.es

 * @since 1.1

 * 

 */

public class Interpolator2D implements IInterpolator {

        private String description = "Interpolaci?n basada en encuadres";

        private String name = "Interpolator2D";

        private IInterpolatorTimeFuntion funtion; 

        /**

         *         Calculating the new positions in the movement animation

         */

        public IKeyFrame interpolate(List<IKeyFrame> kfList, int index, double time) {

                KeyFrame2D KF = new KeyFrame2D();

                if (kfList == null)

                        return null;

                switch (kfList.size()) {

                // this case when there are only has 2 keyframes

                case 2:

                        // getting the keyframes

                        KeyFrame2D kf1 = (KeyFrame2D) kfList.get(0);

                        KeyFrame2D kf2 = (KeyFrame2D) kfList.get(1);

                        if (index == 1) {

                                KeyFrame2D kaux = kf1;

                                kf1 = kf2;

                                kf2 = kaux;

                        }

                        ProjectExtent vp1 = (ProjectExtent) kf1.getAnimatedObject();

                        ProjectExtent vp2 = (ProjectExtent) kf2.getAnimatedObject();

                        double min1 = vp1.getExtent().getMinX();

                        double time1 = kf1.getTime();

                        double min2 = vp2.getExtent().getMinX();

                        double time2 = kf2.getTime();

                        double left = linearInterpolate(min1, min2, time1, time2, time);

                        min1 = vp1.getExtent().getMinY();

                        min2 = vp2.getExtent().getMinY();

                        double top = linearInterpolate(min1, min2, time1, time2, time);

                        min1 = vp1.getExtent().getWidth();

                        min2 = vp2.getExtent().getWidth();

                        double right = linearInterpolate(min1, min2, time1, time2, time);

                        min1 = vp1.getExtent().getHeight();

                        min2 = vp2.getExtent().getHeight();

                        double bottom = linearInterpolate(min1, min2, time1, time2, time);

                        Rectangle2D newExtent = new Rectangle2D.Double(left, top, right,

                                        bottom);

                        ProjectExtent pe = new ProjectExtent();

                        pe.setExtent(newExtent);

                        KF.setAnimatedObject(pe);

                        break;

                }

                return KF;

        }

        /**

         * Return a value interpolate 

         * 

         * @param minX: initial x value in the 2D extent

         * @param minX2: final x value in the 2D extent

         * @param timePos: initial time value

         * @param timePos2: final time value

         * @param time: total time

         * @return

         */

        private double linearInterpolate(double minX, double minX2, double timePos,

                        double timePos2, double time) {

                // P1 + (P2-P1)*((t-t1)/(t2-t1))

                return (minX + (minX2 - minX)

                                * ((time - timePos) / (timePos2 - timePos)));

        }

        public IInterpolatorTimeFuntion getFuntion() {

                return this.funtion;

        }

        public void setFuntion(IInterpolatorTimeFuntion funtion) {

                this.funtion = funtion;

        }

        public String getClassName() {

                return this.getClass().getName();

        }

        public String getDescription() {

                return this.description;

        }

        public String getName() {

                return this.name;

        }

        public XMLEntity getXMLEntity() {

                XMLEntity xml = new XMLEntity();        

                xml.putProperty("className", this.getClassName());

                xml.putProperty("description", this.description);

                return xml;

        }

        public void setXMLEntity(XMLEntity xml) {

                if (xml.contains("description"))

                        this.description = xml.getStringProperty("description");

        }

}