Balloon 3D performance
Raab, Andreas
Andreas.Raab at disney.com
Tue Feb 16 18:59:51 UTC 1999
> At 06:37 PM 2/15/99 -0800, Raab, Andreas wrote:
> >ObSqueak: I just got about 20,000 triangles per second on a P166 with
> >Balloon 3D ;^)
>
> Can you say more about the test conditions. Are these texture mapped,
> z-buffered, perspective correct, 3D triangles?
>
No, yes, no ;-) The entire test was just to see if the primitive level code
is working as expected. No performance measures intended.
> To define a bit of 3-D performance perspective, the low cost ($150) 3D
> accelerator (NVidia Rage 128) in the PC I'm on is rated at about 5
> million,
> texture mapped, z-buffered, perspective correct, 3D triangles per second.
>
These are *theoretical* throughputs. You'll never get them in practice.
Usually, it's quite a good idea to divide these numbers by ten and take this
value for average applications (but 500k is still a lot more than 20k).
> I'm not sure the processor (Pentium II-266) can come up with 15 million
> vertex values/sec though, so actual milage may vary.
>
BTW, there ain't no need for the processor to transfer 15 million vertices,
12 bytes each. Given indexed triangle meshes you may have something between
3-5 million vertices plus 15M 32bit words.
Andreas
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