>Date: Tue, 16 Jul 2002 08:08:41 -0700 >From: Zoran Krunic <[EMAIL PROTECTED]> >Subject: Re: [JAVA3D] Performance Experience >To: [EMAIL PROTECTED] >MIME-version: 1.0 >X-MIMEOLE: Produced By Microsoft MimeOLE V5.50.4807.1700 >Content-transfer-encoding: 8BIT >X-Priority: 3 >X-MSMail-priority: Normal >Delivered-to: [EMAIL PROTECTED] > >Thanks! > >Last night I tried similar code that I got from another member, with some >mods. Looks >similar to this one though. I am getting about 10 FPS - way low for the >hardware I just installed - >DELL 2GHz / 1GB RAM / GeForce 4600 128 MB ?? The CPU is running at 50-60% >with or without >FPS behavior. But as I added FPS behavior ( I also have another more >elaborate behavior for >picking ) it shoots up to 100% - but the speed of the rotations (and thus I >believe the FPS itself) is >not visibly affected. > >I upgraded from the old system - DELL 500 MHz / 256 RAM with old graphics >card where I was getting >one jerky move every 2-3 seconds - so it seems like a good 10-20x >improvement in speed. Current rotation >is real-time, but not smooth. > >After searching through the old emails and FAQs I found the >"java -Dj3d.debug=true" which I added to the >command line - but I still do not get any info on the hardware/software >acceleration from the card.
This is only valid for DirectX version of Java3D. Nothing is output for OpenGL version. > Is there a >sure way to tell what the card is doing ? My scene has some 5000 quads (not >triangles) with indexed geometry, >no textures. Is there a issue with card not supporting quads, but only >triangles in hardware acceleration mode ?? I >think I read that somewhere that it could be an issue ... > >I am also getting strange white line in the middle of the scene - which I >did not have on the old machine. > If you are using v1.2.1_0x directx version, performance of QuadArray is slow. Switching to v1.3 Directx version would get better performance. However in both case using QuadArray in Polygon line mode will seriously affect performance. Quad is not support by DirectX and we can't use two triangles to draw Quad in polygon line mode without showing the diagonal line. We can't use line array either without showing the back face together. As a result we evaluate each face to to cull the back face and use line array in current release for this particular polygon mode. - Kelvin ------------ Java 3D Team Sun Microsystems Inc. =========================================================================== 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".
