samer@1: import javax.media.j3d.*;
samer@1: import javax.vecmath.*;
samer@1: import java.util.Enumeration;
samer@1: 
samer@1: final class FPS extends Behavior {
samer@1: 
samer@1:     protected int nFrames;
samer@1:     protected long startTime;
samer@1:     protected final WakeupCondition w;
samer@1: 
samer@1:     public FPS(int nFrames){
samer@1:         this.nFrames=nFrames;
samer@1:         w=new WakeupOnElapsedFrames(nFrames);        
samer@1:     }
samer@1: 
samer@1:     public FPS(){
samer@1:         this(100);
samer@1:     }
samer@1: 
samer@1:     public void initialize(){
samer@1:         setSchedulingBounds(new BoundingSphere(new Point3d(),1000));
samer@1:         startTime=System.currentTimeMillis();
samer@1:         wakeupOn(w);
samer@1:     }
samer@1: 
samer@1:     public void processStimulus(Enumeration criteria){
samer@1:         long time=System.currentTimeMillis();
samer@1:         System.err.println("fps: "+ 1000 * (double) nFrames / (double) (time-startTime));
samer@1:         startTime=time;
samer@1:         wakeupOn(w);
samer@1:     }
samer@1: }