computer graphics in the 1950s
eric at brouhaha.com
Fri Oct 17 13:50:34 CDT 2008
Bryan Pope wrote:
> The Star Wars vector arcade game from 1983 is just beautiful IMHO.. :-)
> Absolutely no jaggies at all!
That's true of many (but not all) the B&W vector games, such as
Battlezone and Red Baron, but not of the color vector games. In the
color vector games, the CRT itself introduces pixelization, because of
the holes in the shadow mask and the discrete phosphor dots. The
resolution isn't really all that great.
There was a color vector display technology that didn't use a shadow
mask or phosphor dots, but it was very uncommon. It used two layers of
phosphor with different activation energies, and the high-voltage supply
was actually switched between two voltages. The lower voltage only
activated one phosphor, but the higer voltage activated both, so two
different colors were available. This was used in the DEC VR20 monitor,
of which few units were believed to have been sold.
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