Question about Personal IRIS

[Jim Bennett]

In article <1990Sep4.194719.8646 at Solbourne.COM> yagi at unknown.Solbourne.COM (Yukio Yagi) writes:
>
>I am interested in the performance numbers of the Personal IRIS.
>In the "Periodic Table of the IRIS's" dated April 2, 1990 the
>following numbers are given:
>
>        Personal IRIS 4D/25G has performance of 5.1K Polygons/sec.
>        Personal IRIS 4D/25TG has performance of 24K Polygons/sec.
>
>According to the comments, "polygon" numbers are for 10x10 (100pixel),
>full 24-bit color, Lighted, Gouraud-shaded, Z-buffered polygons with
>arbitrary orientation.
>
>What I want to know is:
>
>        1. What's the meaning of "Lighted"?  Is the lighting calculation at
>           each vertex pre-computed or computed at display time?

The normals are sent down with the vertices and the color values are
computed at display time.

>        2. How many and what kind of light sources are used?  What
>           reflection model is used?

Single light source, and the default reflection model (infinite viewer).

Jim Bennett			(bennett at esd.sgi.com)