On Sat, 2003-07-12 at 13:42, Dieter Nützel wrote: > Am Samstag, 12. Juli 2003 12:29 schrieb Doug Rabson: > > On Wed, 2003-07-09 at 16:10, Michel Dänzer wrote: > > > On Wed, 2003-07-09 at 14:11, Martin Spott wrote: > > > > Rupert Levene <[EMAIL PROTECTED]> wrote: > > > > > On Thu, Jul 03, 2003 at 01:07:28AM +0200, Michel Dnzer wrote: > > > > >> PS: http://levene.dyndns.org/invisible-text/normal.png does show a > > > > >> driver problem - the lighting is wrong with HW TCL - but you didn't > > > > >> report that... ;) > > > > > > > > > > Well I'd assumed that _this_ was a software problem since it's a new > > > > > in the latest version =) Is this a known driver problem? > > > > > > Yes. HW TCL seems to be severely broken in general in the Radeon > > > drivers, which can be worked around by setting the R200_NO_TCL (or > > > RADEON_TCL_FORCE_DISABLE) environment variable. > > > > > > > If the scene looks to be too dark, then you can assume it's a driver > > > > problem. > > > > > > Why don't you just take a look at the screenshot? The red tiles aren't > > > supposed to be red. This particular problem seems to be caused (or at > > > least amplified) by many light sources. > > > > I see this kind of thing with my own 3D software (see > > http://qdn.qubesoft.com) running on the r200 dri driver. I have a > > feeling that its something to do with modifying light parameters. In my > > 3D scenes, we render large numbers of objects, potentially each with > > different lighting configurations, depending on which light objects are > > in range of a given object. We call glLightX to modify the parameters of > > the GL lights many times in a single frame. This appears to be the main > > problem with the r200 rendering errors. FWIW, my software works very > > nicely with nvidia hardware/drivers. > > You are free to test with the ATI binary drivers, too. > Can you please try it?
The ATI OpenGL drivers on windows are pretty broken and I think we also tried their linux drivers with similar results. As far as I can remember, depth buffering was quite broken for some obscure reason. I didn't look into it in any detail because it works fine under DX8 on ATI hardware. > > BTW Q looks very cool. > Are there any plans for Unix versions of Q2Demo? I'm currently in the process of testing an alpha-quality version of Q for linux. I've been using RedHat 9 with nvidia hardware as a reference platform but it ought to work on any rpm-based distribution with gcc-3.2.x and recent versions of libjpeg, libpng, libfreetype2, libxml2 and libqt-3.1. Hopefully I should have something ready for downloading next week sometime. ------------------------------------------------------- This SF.Net email sponsored by: Parasoft Error proof Web apps, automate testing & more. Download & eval WebKing and get a free book. www.parasoft.com/bulletproofapps1 _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
