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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
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Hi Ken-I was hoping someone else would answer your question. ;-) I think the main issue is anti-aliasing. The vector is just 3 lines (2 for the arrow head, 1 for the arrow shaft). You could also try setting the line width so the aliasing is not as much of a factor.
An alternative to changing the VisAD code would be to create your own DataRenderer and override the getDataRenderer method of ucar.visad.display.FlowDisplayable. That's what I did to change the default behavior of WindBarbDisplayable.
There are examples of other flow DataRenderers (e.g. SwellRendererJ3D()) in the visad.bom class.
Don On 7/31/13 12:16 PM, Ken Ellinwood wrote:
Answering my own question... the relevant code appears to be in visad.ShadowType.makeFlow(). I'll switch to the visad mailing list for anything else on this issue. Ken ________________________________ From: Ken Ellinwood <kellinwood@xxxxxxxxx> To: "idvusers@xxxxxxxxxxxxxxxx" <idvusers@xxxxxxxxxxxxxxxx> Sent: Friday, July 26, 2013 3:32 PM Subject: [idvusers] Better flow vector arrow rendering, how? See the attached image which shows wind speed in a colored filled contour display and the wind direction via a vector plan view. I'm hoping to get better quality arrow rendering in the vector plan view. When the arrows are oriented horizontally the arrow heads disappear and I'm hoping to fix this somehow, even if it means modifying the code. I've got the IDV, Visad, and NetCDF code for the the 4.0u1 release loaded into my IDE. I've been searching and setting breakpoints hoping to figure out where the arrows are rendered, but haven't stubled up on it yet. Any clues? Thanks, Ken _______________________________________________ idvusers mailing list idvusers@xxxxxxxxxxxxxxxx For list information, to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/ _______________________________________________ idvusers mailing list idvusers@xxxxxxxxxxxxxxxx For list information, to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/
-- Don Murray NOAA/ESRL/PSD and CIRES 303-497-3596 http://www.esrl.noaa.gov/psd/people/don.murray/
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