yagi@unknown.Solbourne.COM (Yukio Yagi) (09/05/90)
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?
2. How many and what kind of light sources are used? What
reflection model is used?
Any information is helpful. Please e-mail or post to this group.
Thanks in advance.
Yukio Yagi
Solbourne Computer Inc.
yagi@solbourne.com or
uunet!stan!yagibennett@sgi.com (Jim Bennett) (09/05/90)
In article <1990Sep4.194719.8646@Solbourne.COM> yagi@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@esd.sgi.com)