Don,
Thanks for the tips, I'll look into using another renderer or creating my own.
Ken
________________________________
From: Don Murray (NOAA Affiliate) <don.murray@xxxxxxxx>
To: idvusers@xxxxxxxxxxxxxxxx
Sent: Wednesday, July 31, 2013 8:54 AM
Subject: Re: [idvusers] Better flow vector arrow rendering, how?
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
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--
Don Murray
NOAA/ESRL/PSD and CIRES
303-497-3596
http://www.esrl.noaa.gov/psd/people/don.murray/
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