Hi Bob,
As for your first question, here is a little piece of code I wrote to test
instantaneous and average frame rate. It is a behavior that wakes up on
every frame and calculates the amount of time that has passed. There are
other ways to calculate frame rate (possibly more accurately) but this was
simple.
BTW, just add it to somewhere in the scene graph, ie:
root.addChild(new FPS());
Evan
-----Original Message-----
From: Bob Gray <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Date: Thursday, March 16, 2000 11:55 AM
Subject: [JAVA3D] Basic Questions
>1) I see people talk about the frame rate they can achieve. How do you
> measure the frame rate in Java 3D? Is there some code you put some
> place in your Java 3D program? If so, can someone post that code so I
>can
> determine my frame rate?
>
>2) What is meant by "full screen mode." I think I read someplace (here?)
> that some opengl graphics cards only do hardware rendering when in "full
>screen
> mode". Does running the Java 3D program in an applet window mean it is
>or is not
> in full screen mode? How do you force a Java 3D program to render in
> "full screen mode"??
>
>3) I think someone here mentioned that when their Voodoo 3dfx 2000 card
>switches to
> full screen mode, there is a spinning 3dfx logo which appears for a
>moment.
> Is that true? (I never see this and I've always suspected that I never
>really
> get into full screen mode nor use the hardware opengl rendering of my
>graphics card.)
>
>4) How do you tell if your graphics card is "turned on" and being used by
>Java 3D?
> (Particular the second part of the question: How do you *know* when Java
>3D is
> using hardware opengl rendering?) (I have a Voodoo 3 2000 card in case
it
>makes
> a difference.)
>
>
>Bob Gray
>
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import javax.media.j3d.*;
import javax.vecmath.*;
class FPS extends Behavior
{
WakeupOnElapsedFrames FPSwakeup = new WakeupOnElapsedFrames(1);
long lastMillis=0; // current time
int curFrames = 0; // current elapsed frames
long totalTime = 0; // total time
long totalFrames = 0; // total frames
public FPS()
{
setSchedulingBounds(new BoundingSphere(new Point3d(0,0,0),1000));
setEnable(true);
}
// Called to init the behavior
public void initialize()
{
// Set the trigger for the interpolator
wakeupOn(FPSwakeup);
}
// Called every time the behavior is activated
public void processStimulus(java.util.Enumeration critera)
{
long curTime;
long et;
// See if any time has elapsed
if (lastMillis==0)
{
lastMillis = System.currentTimeMillis();
wakeupOn(FPSwakeup);
return;
}
totalFrames++;
// Check current time, get elapsed time
curTime = System.currentTimeMillis();
et = curTime - lastMillis;
if (et >= 1000)
{
totalTime+=et;
System.out.println((curFrames+1) + " frames in " + et + "ms Avg: " + ((float) 1000*totalFrames / totalTime) + " FPS");
lastMillis = curTime;
curFrames=0;
}
else
curFrames++;
// Set the trigger for the interpolator
wakeupOn(FPSwakeup);
}
}
