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From: cetron%utah-ced@UTAH-CS.ARPA (Ed Cetron)
Newsgroups: mod.computers.vax
Subject: Re:  microVAX GPX
Message-ID: <8701082011.AA08329@utah-ced.ARPA>
Date: Thu, 8-Jan-87 15:11:01 EST
Article-I.D.: utah-ced.8701082011.AA08329
Posted: Thu Jan  8 15:11:01 1987
Date-Received: Fri, 9-Jan-87 04:48:03 EST
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Approved: info-vax@sri-kl.arpa

sorry for the delay, I took off for winter vacation and its has taken a week
to catch up.....

we have one GPX running vms and I love it (so far...)

1. At what speed are vectors drawn by the GPX?  (How was this measured?)
	fast, but what slows things down is not the drawing speed per se, but
	the speed at which the display list (in vax memory space) can be
	updated, with 100k vectors, this can slow significantly, and modifying
	the display list can take forever.  You CAN turn of the display list
	for animation, but you then lose the capability to move objects, 
	transform objects, repaint the screen etc...

2. What transformations are done in hardware?  Rotation,Scaling,etc.
	I recall that move region (as distinct from move object), rotate region
	and scale region

3. Are namelists supported?
	not sure exactly what you mean... display lists are...

4. Shading and 3-D are not supported?
	nope - big lose.....I am writing my own 3-d and shading stuff now.

5. Software support? (GKS, highlevel packages)
	gks is supported as are several language interfaces (X-windows and
UIS)


	Let me know if you have any more questions.

-ed cetron
Univ of Utah
cetron@ced.utah.edu  or cetron%utah-ced@utah-cs.arpa