Have you tried using the MeshOptimizers in osgUtil ? I can rememeber a report that using them could result in very large performance improvements on verty large models. From memory the vertex data is organised to reduce cache misses etc on the video card.
Cheers, Brad -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mo Flanders Sent: Thursday, 3 November 2011 10:47 PM To: [email protected] Subject: [osg-users] loading and rendering large objects Hi, I'm trying to render Lucy (form the Stanford repository) stable. This model has about 28-million tris. I wrote an offline spatializer to improve culling. Every geode has after the spatializer process about 1-million tris. The size of the model is 2.4 GB - Memory on my NV Quadro 5000 is about 2.5 GB. Sync to VBlank is on. Here my problem: When I'm start the osgviewer it took about 30-40 seconds - that's okay. The viewer also ran with an acceptable frame rate. Everything fine. (Stats: Draw 2.3 GPU: 27.2). If I move Lucy so that only a half or a fourth of the model is displayed the frame rate increased (culling active). BUT if I move the model back - that everything is visible again the frame rate is not that I was expected. (Stats: Draw: 2.68 GPU: 1000.0). Any suggestions? I thought - through the culling process the culled geodes could be deleted on the GPUs memory and they have to reload - but after waiting 120-500 seconds the frame rate doesn't get better. Again any suggestions? ... Thank you! Cheers, Mo ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=43703#43703 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ------------------------------------------------------------------------- DISCLAIMER: This e-mail transmission and any documents, files and previous e-mail messages attached to it are private and confidential. They may contain proprietary or copyright material or information that is subject to legal professional privilege. They are for the use of the intended recipient only. Any unauthorised viewing, use, disclosure, copying, alteration, storage or distribution of, or reliance on, this message is strictly prohibited. No part may be reproduced, adapted or transmitted without the written permission of the owner. If you have received this transmission in error, or are not an authorised recipient, please immediately notify the sender by return email, delete this message and all copies from your e-mail system, and destroy any printed copies. Receipt by anyone other than the intended recipient should not be deemed a waiver of any privilege or protection. Thales Australia does not warrant or represent that this e-mail or any documents, files and previous e-mail messages attached are error or virus free. ------------------------------------------------------------------------- _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
