Hi, On Thursday 23 April 2009 14:16, Robert Osfield wrote: > As an another little aside, in testing on my ATI card I found that the > original hack that was introduced into osg::PolygonOffset, to try and > cope with implementations differences of glPolygonOffset between ATI > and NVidia, now is doing more harm than good. Commenting out this > hack so that glPolygonOffset values are passed identically produces > the best results for me. I never got to try out the hack first hand > before I got this ATI card, and I never got really definitive feedback > on how the previous settings were working. It does seem appropriate > to now revert this old hack though, looks like ATI cards/drivers are > behaving much more similar to NVidia now which is a good thing.
Hmm, I remember that thing. There were some subtle problems with a ATI card where this scaling factors were introduced. My personal feeling at that point in time was that this was a singular bug in the fglrx driver at that time. Solving that a temporary driver problem with a persistent scaling factor is IMO something we should rethink. I personally have resetted *all* these factors explicitly to 1 in *every* application I have some revision control access for - including flightgear. Also note that I do work on ATI gpu's on a regular basis without any problems with these factors equal to one and with huge z buffer problems with the defaults. Greetings Mathias -- Dr. Mathias Fröhlich, science + computing ag, Software Solutions Hagellocher Weg 71-75, D-72070 Tuebingen, Germany Phone: +49 7071 9457-268, Fax: +49 7071 9457-511 -- Vorstand/Board of Management: Dr. Bernd Finkbeiner, Dr. Roland Niemeier, Dr. Arno Steitz, Dr. Ingrid Zech Vorsitzender des Aufsichtsrats/ Chairman of the Supervisory Board: Michel Lepert Sitz/Registered Office: Tuebingen Registergericht/Registration Court: Stuttgart Registernummer/Commercial Register No.: HRB 382196 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
