Thanks, I'll FPSCounter when I get a chance and we'll see.
> Be careful with what you do in the behavior. That might be the reason to
> slow down the application. I don't think that calculating frame rate will
> do that though.
Humm? Is there some bug with WakeupOnElapsedFrames? I'm running a behavior to
extrapolate and update positions of remote players and collision detect each frame, I
tacked the fps counter onto this behavior since it ran each frame and I was checking
the running time of the various methods. (BTW, that series of calculations ended up
being very short and is not the slowdown).
In what ways should I be careful?
Chad Zalkin
>>> Chien Yang <[EMAIL PROTECTED]> 06/21 12:47 PM >>>
In Java 3D 1.3 beta, we did ship with a FPSCounterDemo in our demo.
The FPSCounterDemo uses a FPSCounter behavior to measure the frame rate
of the scene. FPSCounter is easy to use, and all you need is to add
roughly the following 3 lines to your code :
private FPSCounter fpsCounter = new FPSCounter();
// Create the Framecounter behavior
fpsCounter.setSchedulingBounds(bounds);
objRoot.addChild(fpsCounter);
FPSCounter is our prefer method of measuring frame rate. Any comment
and suggestion to improve FPSCounter will be greatly appreciated.
- Chien Yang.
Java 3D Team.
> Date: Fri, 21 Jun 2002 13:18:46 -0400
> From: Lan Wu-Cavener <[EMAIL PROTECTED]>
> Subject: Re: [JAVA3D] Performance Experience
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> To: [EMAIL PROTECTED]
> MIME-version: 1.0
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>
> At 11:25 AM 6/21/2002 -0500, you wrote:
> >I'm basically having a behavior wake up on every frame and marking the
> >time and comparing. I randomly choose frames and average the times and do
> >1/time = fps.
> >
> Thanks!
>
> Be careful with what you do in the behavior. That might be the reason to
> slow down the application. I don't think that calculating frame rate will
> do that though.
>
>
> > >>> Lan Wu-Cavener <[EMAIL PROTECTED]> 06/21 11:01 AM >>>
> >your note reminded me of a question I had related to the performance. I was
> >running my j3d program on w2k. I found that adjusting the processes
> >priority through task management tool can change the j3d program
> >performance although it is not recommended to change the process priority.
> >I wondered if there is similar problem with XP OS (which I don't have any
> >experience). Just a thought for you to check out.
> >
> >Using geometry byRef will improve the performance in terms of changing
> >Shape3d's geometry. But it will not have big impact on the scene rendering.
> >The latter can be improved by occlusion culling.
> >Oh, how do you test the number of frame per second?
> >
> >
> >At 05:21 PM 6/21/2002 +0200, you wrote:
> > >Hi,
> > >
> > >will using the same geometry object along several shape3d nodes
> > >reduce the memory usage IN THE VIDEO CARD memory
> > >or only the SYSTEM memory used by J3D for java objects ?
> > >
> > >
> > > >-----Original Message-----
> > > >From: Discussion list for Java 3D API
> > > >[mailto:[EMAIL PROTECTED]] On Behalf Of Shawn Kendall
> > > >Sent: Freitag, 21. Juni 2002 06:14
> > > >To: [EMAIL PROTECTED]
> > > >Subject: Re: [JAVA3D] Performance Experience
> > > >
> > > >
> > > >Chad Zalkin wrote:
> > > >
> > > >> My application runs really slow with my current scene. When
> > > >I removed
> > > >> textures, I went from < 10 fps to ~30 fps. When I killed a lot of
> > > >> geometery but added some textures, I went to ~60 fps.
> > > >That's with no
> > > >> atmospherics and no lights and no sound.
> > > >>
> > > >> My system sure should be able to handle this:
> > > >>
> > > >> Dual Athlon MP 1700+
> > > >> 512 MB Ram
> > > >> ATI Radeon 7000 (64 mb vid ram)
> > > >> JDK 1.4
> > > >> Java3d 1.3 beta 2
> > > >> WindowsXP Pro
> > > >>
> > > >> Any Ideas why this would run so slow? I don't think I have
> > > >any thread
> > > >> blocking/locking or otherwise obviously bad code.
> > > >>
> > > >> Thanks
> > > >> Chad Zalkin
> > > >
> > > >Not knowing anything else about the size of your apps textures
> > > >and amount of geometry, one possiblity is that you are going
> > > >over your video card memory limit. The behavior you describe
> > > >is typical of that. Whenever you go over the amount of
> > > >available memory, the render system will have to page in and
> > > >out the geometry and textures in your scene. That paging
> > > >across the AGP port will dramatically reduce render
> > > >performance the moment it happens.
> > > >
> > > >Remember, a large part of your video memory is use for frame
> > > >buffer, then the rest can be used for geometrry and textures.
> > > >Also, any other applications can be holding on to video memory
> > > >as well, making it less for your J3D app.
> > > >
> > > >Shawn Kendall
> > > >Java3D Game Tech Developer
> > > >
> > > >===============================================================
> > > >============
> > > >To unsubscribe, send email to [EMAIL PROTECTED] and
> > > >include in the body of the message "signoff JAVA3D-INTEREST".
> > > >For general help, send email to [EMAIL PROTECTED] and
> > > >include in the body of the message "help".
> > > >
> > >
> > >===========================================================================
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> >
> >Lan Wu-Cavener
> >Dept. of Landscape Architecture
> >
> >===========================================================================
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> >
> >ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
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>
> Lan Wu-Cavener
> Dept. of Landscape Architecture
>
> ==========================================================================To
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