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Re: Weird error with SURFACE and log axes. [message #38874]

Wed, 07 April 2004 14:21

K. Bowman
Messages: 330
Registered: May 2000

Senior Member

In article <c51p43$hrq$1@news.nems.noaa.gov>,
Paul Van Delst <paul.vandelst@noaa.gov> wrote:

> http://cimss.ssec.wisc.edu/~paulv/tmp/logarithmic.gif

This seems vaguely familiar. I think it may have to do with hidden-line
removal for high-resolution wire meshes. Have you tried rotating the
plot in XSURFACE or using a rendered surface instead of wiremesh?

Ken Bowman

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Re: Weird error with SURFACE and log axes. [message #39067 is a reply to message #38874]

Thu, 08 April 2004 10:17

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

Kenneth Bowman wrote:
> In article <c51p43$hrq$1@news.nems.noaa.gov>,
> Paul Van Delst <paul.vandelst@noaa.gov> wrote:
>
>
>> http://cimss.ssec.wisc.edu/~paulv/tmp/logarithmic.gif
>
>
> This seems vaguely familiar. I think it may have to do with hidden-line
> removal for high-resolution wire meshes. Have you tried rotating the
> plot in XSURFACE or using a rendered surface instead of wiremesh?

Hello,

This is what I get when I use SHADE_SURF instead of SURFACE:

http://cimss.ssec.wisc.edu/~paulv/tmp/logarithmic_shade_surf .gif

Pretty crappy looking. Going back to the wire mesh, if I rotate around the Z axis by 50
degrees I get the following:

http://cimss.ssec.wisc.edu/~paulv/tmp/logarithmic_az50.gif

Yuck. IDL apparently cannot handle logarithmic axes for its surfacing procedures at all.

Would this be considered a bug in the hidden-line removal algorithm, or an oversight?

paulv

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