Re: transparency line label issue

Hi Derek,

This is indeed a bug :-( I'll file an issue ticket on this. I think I know what's going on. As a work-around, try moving the "pvid = gsn_csm_contour(…)" statement *after* the other two.

Thanks for reporting this.
Rick

On Jul 5, 2012, at 1:11 PM, Derek Mallia wrote:

> Hello,
>
>
> First off, I want to thank you guys for providing NCL to the meteorologist community as it is a great program to work with!
>
> I am sending this email in regards to an issue I am have while trying to plot GFS data. I have been using the new transparency option that was added in the latest release of NCL. Overall, the newest functions have been working great, however I am having a minor issue when plotting line labels. When I'm using the cnFillOpacityF function for a certain variable it has a habit of making my line labels for a different variable somewhat transparent.
>
> For example, I am plotting potential vorticity and I am making the first value fully transparent, while making the rest of the above values with a opacity of ".7". I am then overlaying this over CAPE (which is fine). I am also overlaying height contours. The contour themselves are not transparent, however, the height line labels appear to be transparent (you can see it in my attached png file). I am puzzled why it affects the line label but not the contour line... Granted I don't want the line or the label to be transparent at all.
>
> Considering that I am still in the process of learning NCL I am guessing that I must be overlooking something. I tried changing the overlay issues and changing the line label options but nothing seems to work. Perhaps, its how I am overlaying the PV fill values? I have also looked at some of the example but had limited luck with resolving this specific issue.
>
> I noted in my code where I THINK the issue is.
>
>
> My ncl version and computer information...
>
> 6.1.0-beta
>
> And I am running it on a mac with the lion OS (latest version)
>
> Darwin <comp_name> 11.4.0 Darwin Kernel Version 11.4.0: Mon Apr 9 19:32:15 PDT 2012; root:xnu-1699.26.8~1/RELEASE_X86_64 x86_64
>
>
> Any help would be appreciated!
>
>
>
>
> P.S Attached to this email is a sample output file, my script, and I put the sample gfs file that I have been using on your FTP server in the incoming directory under the name "gfs_4_20111106_1200_000.grb2"
>
>
>
> Derek Mallia
> <cape_300heights_pv.ncl><testpv.png>_______________________________________________
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Received on Thu Jul 5 16:50:20 2012