Am Freitag, 11. Oktober 2002 19:07 schrieb Felix Kühling: > On Fri, 11 Oct 2002 18:00:18 +0100 > > Keith Whitwell <[EMAIL PROTECTED]> wrote: > > Felix Kühling wrote: > > > On 11 Oct 2002 18:15:08 +0200 > > > > > > Michel Dänzer <[EMAIL PROTECTED]> wrote: > > >>I was looking into the lighting issues Felix reported with the > > >>xscreensaver pulsar hack (when running it with the -light option). One > > >>side of the planes looks good, the other one is black, so I thought it > > >>might be related to two-sided primitives. > > >> > > >>Indeed, the hardware TCL code has a fallback for this if the material > > >> is different on both sides. If I hardcode that to always trigger (in > > >> check_twoside_fallback() in radeon_state.c), pulsar looks good with > > >> lighting. > > > > I think this is effectively the same as setting 'R200_NO_TCL=t'. > > > > >>So I thought I'd see if this was related to some lighting oddities in > > >>bzflag, and I made another interesting discovery: with this fallback, > > >> it locks up the chip when connecting to a server, like I reported > > >> before for software TCL. > > >> > > >>In summary, there seem to be multiple problems related to two-sided > > >>lighting in the radeon driver, both with hardware and software TCL. > > >> I'll keep looking into them, but I hope this information will help > > >> someone else find them more quickly. > > > > > > One observation which confused me was that it looked good if I set the > > > alpha channel of global ambient to something other than 1.0 (or was it > > > 0.0?) > > > > Which makes me wonder if it's a codegen/vtxfmt problem -- what happens > > with R200_NO_VTXFMT=t ? > > Neither RADEON_NO_VTXFMT nor RADEON_NO_CODEGEN make any difference.
Even "setenv LIBGL_ALWAYS_INDIRECT" do _NOT_ help with all of my VTK apps in "wire frame mode". So I point at Mesa. And my older Voodoo5 5500 (tdfx) had the same symptoms. Textures only on one side (the outer). But "setenv LIBGL_ALWAYS_INDIRECT" or "setenv R200_NO_TCL 1" help with texturing of the outer side for the r200 case. It is broken since the TCL merge. graphics/examplesCxx> setenv R200_NO_TCL 1 graphics/examplesCxx> ./ColorSph & [1] 9584 graphics/examplesCxx> r200CreateScreen disabling TCL support [1] Fertig ./ColorSph See both snapshots. -Dieter
ColorSph-with-TCL.png
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ColorSph-without-TCL.png
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