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From: rthomson@mesa.dsd.es.com (Rich Thomson)
Newsgroups: comp.graphics
Subject: Re: Rendering performance
Message-ID: <1991May6.234927.17724@dsd.es.com>
Date: 6 May 91 23:49:27 GMT
References: <1991Apr29.162712.1905@canon.co.uk> <1991May3.190648.13574@ucunix.san.uc.edu> <1991May3.224900.12807@dsd.es.com> <1991May6.114747.12681@canon.co.uk>
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In article <1991May6.114747.12681@canon.co.uk>
	laukee@canon.co.uk writes:
>The VGX does 1.1 million *GOURAUD* shaded, *PHONG* lighted, Z-buffered,
>100 pixel, 3-sided polgons (triangle meshes) per second.

The quotations I've all seen refer to flat shaded polygons and not
Gouraud shaded polygons with regards to the 1.1 Mp/s.  Here are the
numbers posted by Kurt Akeley of SGI to comp.benchmarks a while back:

:   size=8, offset=4, zbuffer(1), events=500000, lighting=1
:   running on cashew, GL4DVGX-4.0, Fri Mar 29 15:22:58 1991
:   Triangle mesh performance (lighted):
:      1 triangles per mesh: 189393 triangles per second
:      2 triangles per mesh: 304878 triangles per second
:      3 triangles per mesh: 299400 triangles per second
:      4 triangles per mesh: 387596 triangles per second
:      5 triangles per mesh: 471698 triangles per second
:     10 triangles per mesh: 574712 triangles per second
:     20 triangles per mesh: 641025 triangles per second
:     30 triangles per mesh: 675648 triangles per second
:     62 triangles per mesh: 714240 triangles per second
:   Display listed triangle mesh (lighted):
:     62 triangles per mesh: 769181 triangles per second
:   Display listed triangle mesh (colored):
:     62 triangles per mesh: 1020342 triangles per second
:   Quadrilateral strip performance (lighted):
:     31 quads per mesh: 342465 quads per second
:   Independent triangle performance (lighted):
:      1 triangles per mesh: 192307 triangles per second
:   Triangle mesh performance (flat shaded):
:     10 triangles per mesh: 943396 triangles per second
:     20 triangles per mesh: 925925 triangles per second
:     30 triangles per mesh: 1063787 triangles per second
:     62 triangles per mesh: 1086886 triangles per second
:   Quadrilateral strip performance (flat shaded):
:     31 quads per mesh: 420167 quads per second
:   Independent triangle performance (flat shaded):
:      1 triangles per mesh: 280898 triangles per second

The 1.1 number is for flat shaded triangle meshes and not Gouraud
shaded triangle meshes (which come in at 770K p/s).  I don't believe
they are phong lighted, either; I believe a simple lighting model was
used (the code that generated these numbers was also posted, but I
omit it here).

I noticed also that you edited out my question asking for information
on your claim of 3 Mp/s for the IBM RS6K/730.

						-- Rich
-- 
  ``Read my MIPS -- no new VAXes!!'' -- George Bush after sniffing freon
	    Disclaimer: I speak for myself, except as noted.
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