One triangle in ram? 2004-05-27 - By Bernard Lebel
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Thanks Andras.
Bernard
-- -- Original Message -- --
From: "Andras Ikladi" <kodiak@(protected)>
To: <XSI@(protected)>
Sent: Thursday, May 27, 2004 9:43 AM
Subject: Re: One triangle in ram?
> Bernard Lebel wrote:
>
> >Hello,
> >
> >Does anyone know how much in ram a single triangle takes up? Is this
> >quantifyable?
> >
> >
> >
> It is, but i wouldn`t say it has a linear relationship with scene memory
> requirements (even if we only consider geometry).
>
> Based on the mental ray rendering book:
> A triangle takes about 42 bytes including it`s position vector +
> additional 12bytes for additional vector type data attached (normal
> vector, motion vector, texture vectors..etc). This is for triangle as a
> rendering primitive (ie. after tessellation).
>
> But the real cost also depends on the algorithm to be used (like storing
> the sorted point list for visibility calculations in case of some
> scanline engines vs. raytracing..etc)..and of course other not geometry
> related factors.
>
> Andras
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