Am Freitag, den 14.12.2007, 17:09 +0000 schrieb Keith Whitwell:
> Ben Skeggs wrote:
> > Am Dienstag, den 11.12.2007, 12:47 +1100 schrieb Ben Skeggs:
> >> Hello,
> >>
> >> On nv40 hardware, fixed-function glClipPlane must be implemented in a
> >> vertex program.
> >>
> >> Attached is a patch which adds support for the clip distance vtxprog
> >> outputs as described in GL_NV_vertex_program{2,3,4}. The patch also
> >> allows the driver to configure whether it wants the fixed-function vp
> >> generator to insert clip planes, and the style of matrix multiplications
> >> it prefers.
> >>
> >> If there's no objection I'd like to commit this as it's required for
> >> implementing clip planes in the nv40 gallium driver.
> > No objections then? :) If not I'll commit this tomorrow night after I
> > finish work.
> >
>
> Ben, sorry I missed this the first time round.
>
> I think there's a bit of thinking needed on clip planes generally - I'm
> playing around a little with the i965 driver that also performs the
> cliptesting in a post-amble to the vertex shader. The software draw/
> module would also ideally work this way...
>
> Can you give me a couple of days to look at the issue & maybe work
> through it a bit more with you?
Sounds good. There's also the case of "hw supports vtxprogs, but does
clip planes through other means" to take care of, the current interface
would probably have to stay for this case?
Ben.
>
> Keith
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