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Re: Plotting a long vector on PV-WAVE [message #10459]

Tue, 02 December 1997 00:00

mgs
Messages: 144
Registered: March 1995

Senior Member

In article <3482A196.500F@astro.ufl.edu>, Christos Siopis
<siopis@astro.ufl.edu> wrote:

...
> snap = tvrd(0,0,640,512)
...

David Fanning already replied with the Device, Copy command.

> What's also funny is that the "TV, snap" command worked
> instantaneously on a low-end Sun workstation but it would need half a
> second or more to "unroll" on a much faster DEC Alpha machine. Could
> it be that the Alpha's display holds more information?

This could be due to the video to system bus attributes, which are beyond
IDL's control. If the low-end Sun workstation is using the S24 video, you
should be getting excellent video throughput. I can't recall the specifics
of the white paper I read about five years ago (I wonder what I used to
kill those brain cells), but the basics were that the video and memory bus
were shared, allowing much better performance.

--
Mike Schienle Interactive Visuals
mgs@sd.cybernex.net http://ww2.sd.cybernex.net/~mgs/

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		Re: Plotting a long vector on PV-WAVE By: mgs on Tue, 02 December 1997 00:00
		Re: Plotting a long vector on PV-WAVE By: davidf on Mon, 01 December 1997 00:00

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