Also be aware that on some architectures display lists are just plain faster for static geometry in many cases. I've certainly seen that on NVIDIA.
Glenn Waldron / @glennwaldron On Tue, Feb 28, 2012 at 8:29 AM, Luc Frauciel <luc.frauc...@star-apic.com>wrote: > Hi Martin, > > Be aware that for some combinaison of driver/hardware, VBO just don't work > properly. > I've encoutered the case on some Intel/ATI chipsets. > A simple terrain created with VPB couldn't be loaded. > With VBO OFF, everything was OK. > > Be also aware that if you use small geometries, there is a high overhead > with VBO at initialization. > > It could be a good idea to make VBO you default implementation, but don't > forget to have fallbacks when things will go wrong (especially if you have > no control over target hardware) > > > http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2011-July/052968.html > > http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2008-August/015543.html > > Luc > > > De :"Martin Großer" <grosser.mar...@gmx.de>A :OpenSceneGraph Users < > osg-users@lists.openscenegraph.org>Date:28/02/2012 13:01Objet :Re: > [osg-users] Slow rendering with displaylist.Envoyé par : > osg-users-boun...@lists.openscenegraph.org > ------------------------------ > > > > Hello, > > thanks to you, it was very helpful. Now I will only use VBOs. > > Greetings, > Martin > > > -------- Original-Nachricht -------- > > Datum: Tue, 28 Feb 2012 12:44:15 +0100 > > Von: Daniel Trstenjak <daniel.trsten...@science-computing.de> > > An: OpenSceneGraph Users <osg-users@lists.openscenegraph.org> > > Betreff: Re: [osg-users] Slow rendering with displaylist. > > > > > Hi Martin, > > > > > That is basically true. I want to get a feeling about DisplayLists and > > > VBOs. I know that the display list is a precompiled sequence of OpenGL > > > commands. That is the reason that I tought the display lists should be > > > faster. But the question isn't the comparison, but the slow render > > > performance when I want to use display lists. I think everything is > > > wrong in my implementation. But I don't know what. > > > > My point about system/graphics card memory is wrong. I thought > > about glVertexPointer, but this call isn't even compiled into > > a display list and shouldn't be used with one. > > > > So OSG will most likely use glBegin/glEnd to put the vertex data into > > the display list. > > > > It boils down to what Mathias ;) said, it's an implementation issue, > > dirty corner cases and driver developers don't optimize the > > display lists anymore, because they're deprecated and just not used > > that much anymore. > > > > > > Greetings, > > Daniel > > > > -- > > > > > > > Daniel Trstenjak Tel : +49 (0)7071-9457-264 > > science + computing ag FAX : +49 (0)7071-9457-511 > > Hagellocher Weg 73 mailto: daniel.trsten...@science-computing.de > > D-72070 Tübingen WWW : http://www.science-computing.de/ > > > > -- > > Vorstand/Board of Management: > > Dr. Bernd Finkbeiner, Michael Heinrichs, > > Dr. Roland Niemeier, Dr. Arno Steitz, Dr. Ingrid Zech > > Vorsitzender des Aufsichtsrats/ > > Chairman of the Supervisory Board: > > Philippe Miltin > > Sitz/Registered Office: Tuebingen > > Registergericht/Registration Court: Stuttgart > > Registernummer/Commercial Register No.: HRB 382196 > > > > _______________________________________________ > > osg-users mailing list > > osg-users@lists.openscenegraph.org > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > -- > NEU: FreePhone 3-fach-Flat mit kostenlosem Smartphone! > > Jetzt informieren: http://mobile.1und1.de/?ac=OM.PW.PW003K20328T7073a > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >
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