samer@0: /* Credit: got this from Particles java 3d demo app
samer@0:    by Jeff White (jsw@cs.brown.edu)
samer@0:  */
samer@0: 
samer@0: package samer.j3d;
samer@0: 
samer@0: import javax.media.j3d.*;
samer@0: import javax.vecmath.*;
samer@0: import java.util.Enumeration;
samer@0: 
samer@0: final class FPS extends Behavior {
samer@0: 
samer@0:     protected int nFrames;
samer@0:     protected long startTime;
samer@0:     protected final WakeupCondition w;
samer@0: 
samer@0:     public FPS(int nFrames){
samer@0:         this.nFrames=nFrames;
samer@0:         w=new WakeupOnElapsedFrames(nFrames);        
samer@0:     }
samer@0: 
samer@0:     public FPS(){
samer@0:         this(100);
samer@0:     }
samer@0: 
samer@0:     public void initialize(){
samer@0:         setSchedulingBounds(new BoundingSphere(new Point3d(),1000));
samer@0:         startTime=System.currentTimeMillis();
samer@0:         wakeupOn(w);
samer@0:     }
samer@0: 
samer@0:     public void processStimulus(Enumeration criteria){
samer@0:         long time=System.currentTimeMillis();
samer@0:         System.err.println("fps: "+ 1000 * (double) nFrames / (double) (time-startTime));
samer@0:         startTime=time;
samer@0:         wakeupOn(w);
samer@0:     }
samer@0: }