Re: Clipmapping on Onyx2 Reality

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From: Andreas Ekstrand (Andreas.Ekstrand++at++saab.se)
Date: 08/18/2000 00:27:18

Luis,

Is the texture memory on Reality always smaller than on iR2? Our
customer has put 64Mb in a Reality pipe. Won't this mean that the clip
region will be the same as in an iR2 pipe with 64Mb?

/Andreas

Luis Ignacio Miranda wrote:
>
> Hi Andreas,
>
> Clipmapping is possible on Reality as well as on iRX (iR, iR2, iR3).
>
> The difference is that since the performances of Reality are not as good as
> the iRX, you have less time to draw, so it means that if you spend some of
> these restricted miliseconds for clipmapping, you have even less time for
> drawing.
>
> In addition to this, the texture memory on Reality is smaller than on iRX,
> so the clipregion will be smaller.
>
> Hope to help,
>
> Nacho
>
> Andreas Ekstrand wrote:
>
> > Hi!
> >
> > In previous messages on this list (e.g. 03 Sep 1999) there has been said
> > that clipmapping is only supported in IR hardware. "Onyx2 Reality and
> > Onyx2 InfiniteReality2 Technical Report" says that both Onyx2 Reality
> > and Onyx2 InfiniteReality2 systems support clipmapping in hardware.
> >
> > So what's really the case here? When mentioning the term IR, does one
> > also refer to Onyx2 Reality because this is a budget version of IR or
> > what? We would like to use clipmapping on a Onyx2 Reality - what will be
> > the difference comparing to the IR2?
> >
> > Regards,
> > Andreas Ekstrand
> > --
> > ------------------------------------------------------------
> > Andreas Ekstrand, FGA-AE |E-mail: Andreas.Ekstrand++at++saab.se
> > Saab AB - Simulation Center|Phone: +46 (0)13 - 18 40 42
> > SE-581 88 Linkoping |Fax: +46 (0)13 - 18 41 77
> > SWEDEN |
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-- 
------------------------------------------------------------
Andreas Ekstrand, FGA-AE   |E-mail: Andreas.Ekstrand++at++saab.se
Saab AB - Simulation Center|Phone:  +46 (0)13 - 18 40 42
SE-581 88 Linkoping        |Fax:    +46 (0)13 - 18 41 77
SWEDEN                     |
------------------------------------------------------------

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