I am using a animation behavior which works this way
take initial time value from J3DTimer before start the animation
at each elapsed frame
{
calculate the delta time (current - initial time);
do the animation with that delta time value
(optionally you can multiply delta time by a factor for slowmotion or fast
motion porpuse)
}
This allows very smooth animation under Win98.
You can also extend Alpha class, and force it to use J3DTimer instead
System.currentTimeMillis.
I did it for this demo :
http://www.cpm2002.hpg.ig.com.br/alessandro/gearbox/AlphaGTDemo.html
source code available there.
Another and more complex solution is create your own Timer class based on
J3DTimer, as well a Alpha extension to use it. So you can reset, pause, go
fast or slower as you wish.
Alessandro
----- Original Message -----
From: "Vladimir Vernikovski" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, June 13, 2003 6:05 AM
Subject: Re: [JAVA3D] Animation Tips?
> 1. Unfortunately, I havn't right timemer for the still... And we have in
> WinXP timer with mistake 5 ms and this not good for animation :(
> 2. I'm using J3D Behavior framework, mixed mode but it needs for some
> modification.
>
> If you are interested for results (best run in NVidia Geforce and later
> cards):
> http://homepages.nsys.by:8101/~yvgtest/NewHouse/WebStart/
>
> Vladimir A. Vernikovski
> Programmer
> -------------------------------------------
> JPROOF Technologies Ltd.
> ----- Original Message -----
> From: "Smith, David" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Thursday, June 12, 2003 7:53 PM
> Subject: [JAVA3D] Animation Tips?
>
>
> > Does anyone have any tips or heads-up on developing
> > your own animation system in Java3D? A couple requirements
> > are the ability to animate at all levels, object, geometric,
> > and geometry attributes. Also, I want to be able to
> > control the playback rate/frame rate.
> >
> > I have browsed the archives and some of the issues
> > seem to be :
> >
> > 1) Finding the right timer. System.currentTimeMillis is
> > OS dependent. Others created JNI to the OS(Windows for example
> > to call QueryPerformanceTimer()). Some were saying look at
> > JMF, Timer. So is there a final verdict on what is the
> > best cross-platform timer to use?
> >
> > 2) To use or not to use the J3D Behavior framework, or just
> > do it yourself in Mixed/Immediate mode rendering.
> >
> > 3) <Insert your concerns & questions here>
> >
> > Thanks,
> > -DaveS
> >
> > 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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