Acwruecmp.89
net.games
utzoo!decvax!cwruecmp!pearlmut
Sun Apr 25 20:19:22 1982
Re: ucbarpa.1221: Atari arcade graphics.
The graphics used in "Tempest" (I haven't seen "Space Duel") \are/ vector
graphics.  Atari has a system they call QuadraScan, which was first used
in a b/w version for Asteroids.  A color vector display sounds hard to do,
but the only actual problem you have to deal with is the beam convergence
(how much the red, green, and blue electron beams separate near the edges
of the tube).  The same type of hardware is used as in a b/w vector display
but you have to keep track of three intensities at a time instead of one.