Path: chuka.playstation.co.uk!news
From: "Graeme Evans" <evans@fourny.demon.co.uk>
Newsgroups: scea.yaroze.programming.2d_graphics
Subject: Re: GPU Packets...
Date: Tue, 24 Feb 1998 19:39:01 -0000
Organization: Yaloozer
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I found an interesting page on the internet that had a big list of the
primitives. It seems like all our 3D tmds and stuff have 3D calculations
done on them (by the library assisted by the  GTE?) and get turned into 2D
GPU packets which are for things like triangles and quadrangles. These
packets are what we have the 'packet area' for.

Anyway block fills are about 12 bytes long, going up to 36 bytes for a flat
shaded textured quadrangle, so I guess 24 or 26 must be an 'intelligent
average'. Sprites go in either a free size sprite (16 bytes) or a 16x16
sprite(12 byte) packet which has stuff like colour, an x and y coordinate,
and x and y texture page coordinate, clut ID and height and width

interesting stuff, or maybe its just Sony misinformation, y'never can tell..
Someday I'm going to try this out and fill the packet area with packets of
my own and see what happens (<sound of big crash>) (if i can really be
bothered).

gr