| Re: IDL causes color table flashing on SGI with Irix 6.0.1 [message #3458] |
Wed, 01 February 1995 09:37  |
ian
Messages: 26
Registered: February 1992
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Junior Member |
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Word has it that Liam Gumley <liamg@ssec.wisc.edu> may have said:
[stuff deleted]
> The images displayed in the demo look quite normal *until* the cursor
> is moved inside the draw window. At this point the color table for the
> whole screen abruptly changes, and then changes back to the original
> table when the cursor is removed from the draw window. I have seen this
> happen before on a PC running an X server, but never on a Unix box.
[snip]
That's an effect of IDL using more colors than are currently available
(as in not being used by other apps). When this happens, IDL makes
a local colormap that is only in effect when the cursor is in the image
windows. I use this effect to get 256 colors regardless of what's
running on my 8-bit X terminal. In your case, you might be able to
get around it by setting IDL*colors to a negative number in your
.Xdefaults file, or by saying "window, colors = 200" or some such as the
first command in your IDL session.
+-Ian Novack (Particle Man and Comatose Reader)-------ian@gomez.jpl.nasa.gov--+
| "Press 8 for psychotic silence." -- Wanda Coleman's Jet Propulsion Lab |
| column, Los Angeles Times Magazine, 12/18/94 Pasadena, CA |
+--Disclaimer: Had this been an actual opinion, it would still be mine.-------+
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| Re: IDL causes color table flashing on SGI with Irix 6.0.1 [message #3536 is a reply to message #3458] |
Thu, 02 February 1995 11:17  |
pellet
Messages: 12
Registered: October 1994
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Junior Member |
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H. Ian Novack (ian@gomez.Jpl.Nasa.Gov) wrote:
: Word has it that Liam Gumley <liamg@ssec.wisc.edu> may have said:
: [stuff deleted]
: >The images displayed in the demo look quite normal *until* the cursor
: >is moved inside the draw window. At this point the color table for the
: >whole screen abruptly changes, and then changes back to the original
: >table when the cursor is removed from the draw window. I have seen this
: >happen before on a PC running an X server, but never on a Unix box.
: [snip]
: That's an effect of IDL using more colors than are currently available
: (as in not being used by other apps). When this happens, IDL makes
: a local colormap that is only in effect when the cursor is in the image
: windows. I use this effect to get 256 colors regardless of what's
: running on my 8-bit X terminal. In your case, you might be able to
: get around it by setting IDL*colors to a negative number in your
: .Xdefaults file, or by saying "window, colors = 200" or some such as the
: first command in your IDL session.
I use to run IDL on a SGI Iris and I had a similar problem. I reduced
the number of colors reserved for IDL, as suggested above, but the
problem still showed when the mouse went over either an icon or any GL
graphic windows. I also recall that RSI was unable to fix this.
Other than that, it worked great.
Jeff
pellet@inrs-ener.uquebec.ca
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| Re: IDL causes color table flashing on SGI with Irix 6.0.1 [message #3544 is a reply to message #3458] |
Thu, 02 February 1995 06:41 |
Liam Gumley
Messages: 473
Registered: November 1994
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Senior Member |
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ian@gomez.Jpl.Nasa.Gov (H. Ian Novack) wrote:
>> The images displayed in the demo look quite normal *until* the cursor
>> is moved inside the draw window. At this point the color table for the
>> whole screen abruptly changes, and then changes back to the original
>> table when the cursor is removed from the draw window.
>
> In your case, you might be able to
> get around it by setting IDL*colors to a negative number in your
> ..Xdefaults file, or by saying "window, colors = 200"
In fact the problem was solved by placing the line
Idl*visual: PseudoColor
in my .Xdefaults file (when the pseudocolor visual is active).
Now everything works just fine.
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