Re: [Mesa3d-dev] Fog still different

[Brian P. <br...@va...>]

Brian Paul wrote:
> 
> Klaus Niederkrueger wrote:
> >
> > On Fri, 16 Feb 2001, Keith Whitwell wrote:
> >
> > > Klaus Niederkrueger wrote:
> > > >
> > > > Hi,
> > > >
> > > > I have compared again the software-fog in the 'fire'-demo with Mesa-3.4
> > > > and Mesa-3.5 and in Mesa-3.5 it is still a lot denser than in the old one.
> > > >
> > > > I don't know if this is important or not and if was a bug, I have no idea
> > > > if it is now or it was before.
> > > >
> > > > I haven't try though Mesa-3.4.1.
> > >
> > > On what driver?
> > >
> > > I've got the two X11 drivers running side by side & they look identical.
> > >
> > > Keith
> > >
> >
> > Just normal software-rendering.
> > 24bit TrueColor
> > Frame buffer: 24bit R8:G8:B8:A0
> >
> > I don't know what else could help.
> 
> I'm seeing denser fog with 3.5 than 3.4.x too.  Strange thing is,
> I think it looked OK the first time I ran it but subsequent runs
> look different.  Might be an uninitialized variable somewhere.
> I'm looking into it.
> 
> The fire demo seems to be the only demo w/ fog that looks different.
> Tunnel, for example, looks identical with 3.5 and 3.4.x.

There's a call to glHint(GL_FOG_HINT, GL_NICEST) which is only
compiled in if FX is defined.  If the hint is GL_NICEST fog is OK.
But if the hint is GL_FASTEST or GL_DONT_CARE the fog is extra
dense.  That narrows it down...

-Brian