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From: laser-lovers@uw-beaver.UUCP
Newsgroups: fa.laser-lovers
Subject: Re: Imagen Tektronix Emulation
Message-ID: <2080@uw-beaver>
Date: Fri, 2-Nov-84 01:45:46 EST
Article-I.D.: uw-beave.2080
Posted: Fri Nov  2 01:45:46 1984
Date-Received: Sat, 3-Nov-84 01:42:23 EST
Sender: yenbut@uw-beave
Organization: U of Washington Computer Science
Lines: 25

From: pur-ee!malcolm@Berkeley (Malcolm Slaney)
I ran into two problems with the Tektronix Emulation mode on the Imagen.  One
we were able to get around and the other I wasn't.  Imagen has fixed both 
problems in a later version of the software.  Now if I can just get Purdue
to buy (and run) the new firmware....

The first problem is that the Imagen didn't always grok the Tek commands.
Tek's understand a funky command format that lets you default the most
significant bits of a coordinate to the current drawing coordinate.  This
was done to speed up transmission time.

I was able to get around the problem by always sending the full position.
I think this fixes the first problem you describe.

The other problem I wasn't able to get around is that the Imagen can't
draw a vector of length 0 (just one point.)  As I said before Imagen has
fixed both of these problems.

I'm not sure what you mean by "missing scan lines".  I often send very
complicated 3-d plots (thousands of vectors) to our Imagen and it never 
loses any of it.  I have seen missing scan lines when I tried to use a 
half tone font but that is another problem.

							Malcolm
							Purdue EE Dept.