Fouad,
I ran six different tests on my platform, which is described below, with
the following results:
Screen @ 16-bpp:
OGL App: 16 FPS (selected 16-bpp, 640x480, windowed)
J3D On OGL: 11 FPS
J3D On D3D: 38 FPS
Screen @ 32-bpp:
OGL App: 11.5 FPS (selected 32-bpp, 640x480, windowed)
J3D OGL: 9.8 FPS
J3D D3D: 30 FPS
My configuration is:
- Compaq Armada Laptop, Win2K, 192MB, Rage Mobility-P
- JDK 1.3
- J3D 1.2 OGL, J3D D3D 1.2 Beta
I think the performance you are not seeing with J3D on OGL is likely due to
J3D selected a configuration which is not utilizing your graphics hardware
driver (as opposed to rendering in software). I know with J3D D3D you can
find out if J3D is actually using hardware but I don't think you can do
this with J3D on OGL.
I still would like to see someone from the J3D team respond to your
setTransform() question.
--Mark
At 05:33 PM 8/25/2000 +0200, you wrote:
>I downloaded last week an C++ OpenGL written particle system demo and i
>decided to write a particle system in Java 3D. The C++ OpenGL demo is using
>about 150 to 200 particles and getting by 640x480 at 32bpp 210 FPS. The one
>i tried to make in Java3D is making 40 FPS in the same system with 135
>particles (without doing any scales on the particles or any transparency
>manipulation). This is a huge difference.
>
>I profiled the example and the result was: 1000 Frames took about 26
>seconds. 14 seconds were spent in the TransformGroup.setTransform(...) of
>the particles update method. I think this is too much and it looks like the
>method blocks because of some synchronisation. Maby I am interpreting or
>doing something wrong ? so feel free to comment.
>
>I attached a zip file with both the OpenGL and the Java3D examples. I hope
>that no one is upset about that. If you have any suggestions to make the
>JAVA3D example faster or any comments I will be delighted to hear from you.
>
>In the OpenGL demo you can switch between the demos pressing the keys 1-8.
>Number 2 is the one close to what the Java3D demo does.
>
>Thank you
>
>Fouad.
>
> <<particleSystem.zip>>
>
>
>
Mark Ferneau 240-462-6262 (cell)
Director of Adv. Technology 801-437-4608 (efax)
Xtivia Technologies, Inc. 732-469-5954 x629 (NJ office)
[EMAIL PROTECTED] 301-279-5703 (home office)
http://www.xtivia.com/ [EMAIL PROTECTED] (wireless email)
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