Application: gvSIG desktop

package com.iver.cit.gvsig.animation;

import java.util.List;

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.IInterpolatorFuntion;

import com.iver.cit.gvsig.fmap.layers.FLyrDefault;

import com.iver.cit.gvsig.project.documents.view.gui.BaseView;

/**

 *  Class to interpolate the transparency of a activated layer.

 */

public class InterpolatorTransparency implements IInterpolator {

        public BaseView view;

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

                KeyFrameTransparency KF = new KeyFrameTransparency();

                // if the list of keyframes is empty.

                if (kfList == null)

                        return null;

                switch (kfList.size()) {

                // this case when there are only has 2 keyframes

                case 2:

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

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

                        if (index == 1) {

                                KeyFrameTransparency kaux = kf1;

                                kf1 = kf2;

                                kf2 = kaux;

                        }

                        if ((kf1 == null) ||(kf2 == null))

                                return null;

                        //initial transparency level.

                        double transparencia1 = kf1.getLevelTransparency();

                        //final transparency level.

                        double transparencia2 = kf2.getLevelTransparency();

                        // Object to animate getting the keyframe.

                        FLyrDefault fd1 = (FLyrDefault) kf1.getAnimatedObject();

                        //FLyrDefault fd2 = (FLyrDefault) kf2.getAnimatedObject();

                        double time1 = kf1.getTime();//initial time.

                        double time2 = kf2.getTime();//final time.

                        double valorTrans = linearInterpolate(transparencia1, transparencia2, time1, time2, time);

                        System.out.println("valor interpolado " + valorTrans);

                        //Creating the keyframe KF to return.

                                try {

                                        KF.setLevelTransparency((int)valorTrans);

                                        KF.setAnimatedObject(fd1);// keyframe with the layer and the new transparecy to apply.

                                } catch (Exception e) {

                                        // TODO Auto-generated catch block

                                        e.printStackTrace();

                                }

                }

                return KF;

        }

        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 Object getAnimatedObject() {

                return null;

        }

        public void setAnimatedObject(Object ani) {

        }

        public IInterpolatorFuntion getFuntion() {

                // TODO Auto-generated method stub

                return null;

        }

        public void setFuntion(IInterpolatorFuntion arg0) {

                // TODO Auto-generated method stub

        }

}