We've seen similar problem on Ultra80 with Elite3d-m3,m6 using
OpenInventor. It is an OpenGL problem. We reinstalled OpenGL a couple
of times with Sun's latest patches. This solved the problem. You might
want to try that.
Karen
Blair MacIntyre wrote:
>
> We recently got some Ultra60s with both Elite-m6 and Expert3D cards in
> them. We're now trying out some of our Java-3D programs that use large
> textures (the Expert3D is the first card for the sun that may have
> decent texture performance for our apps).
>
> However, we are seeing a disturbing artifact we didn't see on (slower) NT
> machines.
>
> The simple program we tried creates a simple polygon with a large-ish
> (512x512) texture on it, and spins it in the center of the screen.
>
> On the NT machines, it's nice and smooth. On the Elite-3D, it
> "stutters" occasionally. Surprisingly, on the Expert-3D, the polygon
> motion has a lot more stutter in it.
>
> By stutter, I mean that it pauses occasionally (short pauses), and then
> jumps when it starts (since this is a time-based animation). This is the
> kind of thing I was used to seeing when I used Modula-3 with a
> non-incremental garbage collector or with non-native threads. But, we are
> using Hotspot, have incremental GC enabled, and are using native threads.
>
> We tried the verbose heap debugging and there is no global collections
> happening. Our program is not generating any garbage itself (of course,
> who knows what J3D is doing).
>
> We are using the newest software: 1.3 beta of Java2, and 1.2 Java3D.
>
> Any ideas what might be causing the non-smooth performance? There is
> nothing running on the machine that would cause it: my own Modula-3
> programs (which use garbage collection, threads and opengl, but not
> native threads) run perfectly smoothly.
>
> thanks for any pointers.
>
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--
_______________________________________________________________
Hong-Qian (Karen) Lu, Ph.D.
Schlumberger Austin Technology Center email: [EMAIL PROTECTED]
8311 North FM 620 Road voice: (512) 331 3350
Austin, TX 78726 fax: (512) 331 3075
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