Are these really big shapes? You are talking rendering times in seconds...
thats scary. Are you running on really low end equipment, or do you have
super high density shapes? We are running at 10 ms a frame with hundreds of
shapes. If you are using really high density shapes then its doubtful that
the viewer can distinquish the difference. You might want to consider using
an edge collapse algorithm or level of detail or something to cut the amount
of geometry down.
Dave Yazel
-----Original Message-----
From: Joachim Diepstraten
[mailto:[EMAIL PROTECTED]]
Sent: Friday, July 06, 2001 8:01 AM
To: [EMAIL PROTECTED]
Subject: Re: [JAVA3D] How to improve performance with GeometryUpdate?
Hi David
> So you set up the geometry by-ref and then just change those vertices
> directly without using a GeometryUpdater?
Yep
> 1. To my knowledge this is a big no-no. What if Java3d is in the middle
of
> reading those data elements and you are half way into changeing them?
Hmm yes this would explain some certain effects I'll get that it somehow
seems to stall. I changed the methods to synchronize still no effect.
> 2. I don't understand why it would be that much faster. The
GeometryUpdater
> is just a basic sychonization protection.
Hmm I don't know either. But fact is that scenes containing over 300
shapes take 30-40 seconds to update. The same scene with optimized shape
nrs containing 11 shapes but the same ammount of polygons takes less than
a second. The same scene with the same nr of shapes not using
GeometryUpdate takes also less than a second.
> 3. I still don't understand why you find it slow in the first place. We
> have found geometry updater to be pretty fast. We are doing many things
> using it including skin and bones animation, 5 nested skydomes, particle
> systems, water, etc. In fact when we went from static sky domes to using
> the by-ref geometry and GeometryUpdater our frame rate improved
> dramatically.
Hmm maybe I'm doing something wrong. Here what I do.
I've got a scene. And some simple GUI containing a button. When I press a
button an event is invoked and on all shapes in the scene a transform
method is called. This method instances the GeometryUpdate for all it's
geometries. This GeometryUpdate just transfers the data to another object
which does the real transformation.
EOF,
J.D.
--
Jmark2k+1 (http://www.antiflash.net/jmark)
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