Re: Q: pfLayerModes

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Angus Dorbie (dorbie++at++multipass.asd.sgi.com)
Fri, 13 Jun 1997 16:57:05 -0700

Do you have a visual with stencil bits?

Cheers,Angus.

On Jun 13, 1:57pm, Mark Baranowski wrote:
> Subject: Re: Q: pfLayerModes
>
> [ plain text
> Encoded with "quoted-printable" ] :
On Thu, 12 Jun 1997 09:29:46 -0700, Angus wrote:
>
> >This 'poke throuch' is a classic symptom of the polygon offset method
> >for decals.
>
> >You need to use the STENCIL method which is fast on iR, I'd have
> >expected high quality to be equivalent to this but apparently not.
>
> As far as I can see it is, because the effect is exactly the same
> whether I use PFDECAL_BASE_STENCIL or PFDECAL_BASE_HIGH_QUALITY.
> Neither gives the desired result in my case. Has anyone successfully
> used STENCIL mode in pf2.x for pfLayers?
>
> >There's also a plane equation method in performer 2.2.
>
> Roll on 2.2 then (release date?). Is there any particular reason why
> the Z buffer algorithm in the article "The hidden charms of the Z
> buffer" is not provided as one of the Performer modes for rendering
> decals?
>
> >In summary, use PFDECAL_BASE_STENCIL,
> >don't use PFDECAL_BASE_DISPLACE or PFDECAL_LAYER_OFFSET
> >
> >Cheers,Angus.
> >
> <snip>
>
> Regards,
>
> Mark.
> --
> Mark Baranowski at work (baranowski++at++marklynn.demon.co.uk)
> Pera, VR Division. Melton Mowbray, Leics. LE13 0PB. UK.
> Tel: +44 (0)1664 501501, Fax: +44 (0)1664 501553
> All opinions expressed are my own and should not be viewed
> as representing my employer unless stated otherwise.
> List Archives, FAQ, FTP: http://www.sgi.com/Technology/Performer/
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> SGI DevForum 97 info: http://www.sgi.com/Forum97/
>-- End of excerpt from Mark Baranowski

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