| Re: peculiar things with Z-device [message #30986 is a reply to message #30985] |
Fri, 31 May 2002 05:21  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Sverre Solberg (sso@nilu.no) writes:
> I am plotting data points on maps using the map functions in idl and
> using the Z-device. When the points are close to the plot boundary,
> the program occasionally crashes and complains about too few valid
> data points. It crashes when trying to call the 'oplot' procedure (for
> each individual point). The peculiar thing is that this works
> perfectly using other devices (as 'x', 'cgm'). And the even more
> peculiar thing is that this depends on the value of oplot's keyword
> 'symsize'. For example if I use symsize=0.4 it crashes, whereas
> symsize = 0.38 or 0.42 works without problems...
>
> I must admit this belongs to the more weird things I have experienced
> with idl.
>
> When I use the 'convert_coord' function, it doesnt seem though as the
> problematic points are outside the plotting area (device coordinates
> are larger than 0).
>
> Has anybody any similar experiences?
I've seen weird things with the Z-buffer, too.
One of the things I do as a rule is set !P.Charsize to 1
when I enter the Z-buffer. This seems to make the buffer
environment consistent with my display device. Since the problem
you describe seems to have something to do with sizes,
I would give this a try. Couldn't hurt. :-)
Cheers,
David
--
David W. Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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