David,
Have you tried playing with the folowing property flag ?
- Space versus time property
By default, Java3d only builds display list for by-copy geometry. If
an application wishes to have display list build for by-ref geometry
to improve performance at the expense of memory, it can instruct Java3d
by disable the j3d.optimizeForSpace property to false. For example :
java -Dj3d.optimizeForSpace=false MyProgram
This will cause Java3d to build display list for by-ref geometry and
infrequently changing geometry.
See also : Part II - isFrequent bits, and Part IV - Geometry by
reference.
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> Date: Fri, 4 Jan 2002 23:36:38 -0500
> From: David Yazel <[EMAIL PROTECTED]>
> Subject: [JAVA3D] setCapabilityIsFrequent
> To: [EMAIL PROTECTED]
>
> I was wondering if we could get a bit of information on how this nice piece
> of optimization works. There is one critical place where we need to use
> this. Our skin and bones animation system uses some metrics to determine
> how often to recalculate skins of all avatars. One thing that we found in
> 1.2.1 is that no matter how seldomly we actually updated the skins the
> performance degraded with each avatar added to the scene. Our metrics
> reduces the frequency of updates based on the number of avatars in the
> scene, and how close each one is to the view and the current framerate. So
> we give higher priority to avatars closer to the view and less priority to
> the avatars farther away. This means when we have 10 avatars, with 3 very
> close and 7 fairly distant that the farther ones might be redrawn every 200
> ms, but the closer ones might be redrawn every 25 ms.
>
> If use clearCapabailityIsFrequent(GeometryArray.ALLOW_REF_DATA_WRITE) on the
> avatars being updated 4 times a second is there a chance they will be
> rendered with a display list? In this scenario should we be using this
> technique to improve performance?
>
> Sincerely,
>
> Dave Yazel
> Cosm Development Team
>
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