comp.lang.idl-pvwave archive: archive » Weird error with SURFACE and log axes.

Home » Public Forums » archive » Weird error with SURFACE and log axes.

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Weird error with SURFACE and log axes. [message #38875]

Wed, 07 April 2004 13:28

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

Senior Member

Hello,

IDL> print, !version
{ x86 linux unix linux 6.0.3 Feb 26 2004 32 64}

I'm noticing a weird effect when I use log axes in the SURFACE command. Using a linear
X-axis I get the following:

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

Everything is honky dory... except that the data is all smushed up at the lower pressures.
I changed the X(pressure) axis to a log one and I now get:

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

with the weird cutout (corresponds to a vertical line).

Anyone seen this before and know how to fix it?

Thanks,

paulv

Report message to a moderator

Re: Weird error with SURFACE and log axes. [message #39059 is a reply to message #38875]

Thu, 08 April 2004 18:29

Kenneth P. Bowman
Messages: 585
Registered: May 2000

Senior Member

In article <c542al$a3c$1@news.nems.noaa.gov>,
Paul Van Delst <paul.vandelst@noaa.gov> wrote:

> 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
>

I'd call it a bug. But what do I know? :-)

Ken

Report message to a moderator

Previous Topic:	Read & write data files b/w IDL & Fortran 90
Next Topic:	resolve_all errors

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 15:11:39 PDT 2025

Total time taken to generate the page: 0.00534 seconds