[ncl-talk] Odd Reference Vector Opacity Issue

[Rick Brownrigg]

Hi Nick,

I unfortunately am not able to duplicate this issue (?)  I've used 6.3.0,
and I cobbled together a plot that uses, in order

gsn_csm_contour_map
gsn_add_text to the contour
gsn_csn_vector
...
overlay(plot, vector)

and I've tried to used the same resources everywhere.  Are any other
opacity resources getting set in the script?

I'm not sure what to tell you...
Rick


On Fri, Jun 9, 2017 at 2:03 PM, Rick Brownrigg <brownrig at ucar.edu> wrote:

> Hi Nick,
>
> That likely is indeed a bug and I will look into it and let you know.
>
> That's a nice looking animation BTW!
>
> Rick
>
> On Fri, Jun 9, 2017 at 1:01 PM, Bassill, Nicholas <nbassill at albany.edu>
> wrote:
>
>> Hi All,
>>  I *think* I may have found a bug. For reference, I'm using NCL 6.3. Long
>> story short, I make a complex plot in real time with lots of overlays of
>> various variables, mostly for aid in severe weather prediction/detection,
>> using NY Mesonet data. I denote strong wind gusts, and change their opacity
>> to reflect how long ago they occurred. Here is a sample loop from today:
>> http://www.atmos.albany.edu/facstaff/nbassill/live/NCLexample.gif
>>
>> You'll notice the winds gusts (properly) change their opacity with time.
>> The weird thing is that the reference vector changes its opacity with time
>> as well, despite the fact I'm not instructing it to. The code is very long,
>> so I'll just send the important parts of the script, below:
>>
>>
>> ....
>>
>> ;;;; this part plots the site winds, and determines opacity based on time
>>
>>
>> size = dimsizes(sitewindtime)-1
>> tres                      = True
>> tres at tfPolyDrawOrder  = "PostDraw"
>> tres at txFont = "helvetica-bold"
>> tres at txFontHeightF        = 0.013
>> ;tres at txFontThicknessF = 3
>> do n=0,size(0)-1,1
>>       if sitewinds(n).gt.25
>>       tres at txFontOpacityF = 1-(sitewindtime(n)/35)
>>       stationtext  =     gsn_add_text(wks,plot,round(si
>> tewinds(n),3),sitewindlons(n),sitewindlats(n),tres)
>>       end if
>> end do
>>
>> ....
>>
>>
>> ;;;; vector stuff
>>
>>         res_vc                            = res
>>
>>         res_vc at vcGlyphStyle               = "LineArrow"
>>         res_vc at vcLineArrowThicknessF      = 5
>>         res_vc at vcMinDistanceF             = 0.01
>>         res_vc at vcRefLengthF               = 0.03
>>         res_vc at vcRefAnnoOn               = True
>>         res_vc at vcRefMagnitudeF           = 25
>>         res_vc at vcRefAnnoString1          = "25 mph"
>>         res_vc at vcRefAnnoSide             = "Top"
>>         res_vc at vcRefAnnoString2On        = False
>>         res_vc at vcRefAnnoPerimOn          = False
>>         res_vc at vcRefAnnoOrthogonalPosF   = -0.76    ; more positive
>> moves up
>>         res_vc at vcRefAnnoParallelPosF     = 0.94    ; more positive moves
>> to right
>>         res_vc at vcRefAnnoBackgroundColor  = "SkyBlue"
>>         res_vc at vcVectorDrawOrder         = "PreDraw"
>>         res_vc at vcMinAnnoFontHeightF      = .012
>>         res_vc at vcGlyphOpacityF   = 1
>>         res_vc at txFontOpacityF = 1
>>         vector  = gsn_csm_vector(wks,udata,vdata,res_vc)
>>
>>         overlay(plot,vector)
>>
>> ....
>>
>>
>> ;;; next two lines were my attempt to try resetting things before drawing
>> tres                      = True
>> tres at txFontHeightF        = 0.01
>>
>> draw(plot)
>>
>> -----------------
>>
>>
>> If anyone has any suggestions, please let me know.
>>
>>
>> Nick Bassill, PhD
>>
>> Modeler & Meteorologist, New York State Mesonet
>>
>> LC SB-28, 1400 Washington Ave.,
>>
>> SUNY, University at Albany, NY 12222
>> (518) 442-6375
>>
>> http://nysmesonet.org/
>>
>> _______________________________________________
>> ncl-talk mailing list
>> ncl-talk at ucar.edu
>> List instructions, subscriber options, unsubscribe:
>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20170612/a48d1b91/attachment.html