From: Angus Dorbie (dorbie++at++sgi.com)
Date: 07/07/2000 13:45:32
Although back faces are normally not visible they would still affect
fill unless you back face cull them. The stats gathered should have used
the geostate information w.r.t. face culling. This may have been a bug,
perhaps you could have explicitly set your face culling mode in the
geostates as a workaround.
CHeers,Angus.
"Schmidt, Rudolf" wrote:
>
> Angus:
>
> I do remember that there are cases when the pixel-fill stats are not 100 %
> reliable.
> We had a case half a year ago, when the values shown in pfStats were to high
> !
>
> Reason was as follows: if we chose a visual that did not have 8 bit stencil
> for sampling the z-hits, an OpenGL windows was automatically opened by
> Performer in the background for accumulating the samples.
> However, by default this window had backface removal off ! Thus, additional
> draw-hits came from the backsides of surfaces (which are normally not
> visible, of course).
>
> Is this already corrected in the current Performer versions ?
>
> -- Rudi
>
> > -------------------------------------------------------
> > Rudolf Schmidt Krauss-Maffei Wegmann GmbH & Co.KG
> > Exec Engineering & Research Dept. W-AS 2
> > Training and Training Systems Krauss-Maffei-Str. 11
> > Tel: ++49 (89) 8140 - 4509 80997 Muenchen
> > Fax: ++49 (89) 8140 - 4912 Germany
> > mailto:Rudolf.Schmidt++at++KMWeg.de http://www.kmwsim.de
> > -------------------------------------------------------
> >
>
> -----Ursprüngliche Nachricht-----
> Von: Angus Dorbie [mailto:dorbie++at++sgi.com]
> Gesendet: Dienstag, 4. Juli 2000 03:49
> An: Alexander Knob
> Cc: Info Performer
> Betreff: Re: Computing depth complexity
>
> > Alexander Knob wrote:
> >
> > Hi,
> >
> > Somebody of your Gurus has a code snippet to compute depth complexity
> > of a given scene ?
> >
> > Thanx for your help.
> >
> > Alexander.
> >
> >
>
> Performer statistics can already do this.
> See the perfly sample code, if you run perfly you can select "Fill"
> stats using the gui.
>
> Cheers,Angus.
>
> --
> For Performer+OpenGL tutorials http://www.dorbie.com/
>
> "In the middle of difficulty lies opportunity."
> --Albert Einstein
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