Hi Don, Brendon, et al.:
Re: virtual X server and IDV:
I've been investigating the TurboVNC/VirtualGL packages to see if I can get IDV
to work properly on a server that does not run a real X server ... still in the
preliminary stages. If anyone else has tried, though, do let us know!
--Kevin
_____________________________________________
Kevin Tyle, Systems Administrator
Dept. of Atmospheric & Environmental Sciences
University at Albany
Earth Science 235, 1400 Washington Avenue
Albany, NY 12222
Email: ktyle@xxxxxxxxxx
Phone: 518-442-4578
_____________________________________________
-----Original Message-----
From: idvusers-bounces@xxxxxxxxxxxxxxxx
[mailto:idvusers-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Don Murray
Sent: Wednesday, August 28, 2013 3:46 PM
To: idvusers@xxxxxxxxxxxxxxxx
Subject: Re: [idvusers] ISL script examples please? (and dreams)
Thanks for the clarifications, Brendon! Nice work!
Don
On 8/28/13 1:44 PM, Brendon Hoch wrote:
> Don Murray wrote:
>> Hi Brendon-
>>
>> Thanks for this information. Hopefully it will help others along. A
>> couple of questions/comments:
>>
>> - did you have to install the old Java 3D library to get this to work
>> with Xvfb? Kevin Tyle has been looking at this for supporting the
>> IDV image generation in RAMADDA, so if you've found a solution
>> without that, we should chat offline.
>
> I believe I used the "legacy" Java 3D library during the IDV install
> process as recommended by previous users. Nothing else special...
>
>> - You could do the annotation in ISL as well - it supports image and
>> text overlays with the <overlay> tag. You can control the font and
>> background color of the text. Is there a reason you are using
>> convert instead?
>
> We use convert to caption much of our other image generation from
> Gempak, so it was easier to recycle existing code.
>
>> - you can also create animated gifs with convert using the -loop option.
>
> Generating gifs (or animated gifs) didn't work with idv + Xvfb, only png.
>
> Another issue was a limitation based on our mapwall configuration.
> Previously, we used Imagemagick's "display" command for showing
> imagery on a screen with the "-window root" option (clean, full screen
> image without window borders). This works fine with older flavors of
> Linux that treat a quad-head graphics card with multiple monitors as
> separate screens (0.0, 0.1, 0.2, etc). Newer versions of Linux treat
> multiple monitors as one big screen, so an alternative was needed.
> I'm now using "feh" to display individual images in a multi-screen
> environment. It allows you to set exactly on your "screen" where you
> want the image by specifying a size & offset using the -g option.
> Based on our setup, feh worked better with individual gifs than animated gifs.
>
> Cheers,
> Brendon
>>
>> As Jeff McWhirter used to say - ISL is the most fully documented code
>> in IDV. Glad you found it worked for you.
>>
>> Don
>>
>>
>>
>> On 8/28/13 6:31 AM, Brendon Hoch wrote:
>>> Brian,
>>>
>>> I've attached an isl script, shell script, and bundle that I've been
>>> using for the past few months to generate a real time satellite
>>> imagery loop for our mapwall display. Some notes:
>>>
>>> - We're using Centos 5.8 64 bit with plans to move to CentOS 6.x in
>>> the near future.
>>> - Script is scheduled for generation every 30 minutes at :14 & :44
>>> to give enough time for satellite images to populate on ADDE servers.
>>> - We're using stock Xvfb for a display buffer. Xvfb runs all the
>>> time, you might need to create a startup script, which you should be
>>> able to find examples of by searching the web based on your linux flavor.
>>> - Historically, 64 bit IDV has had issues generating gifs with Xvfb.
>>> But, it seemed to work ok for generating png files. So, I convert
>>> from png to gif using Imagemagick's convert command. I also use
>>> Imagemagick to add nice labels to the image. I use gifsicle to
>>> generate an animated gif.
>>> - I haven't tried generating .mov files because our mapwall display
>>> doesn't use them, but the process should be similar. The ISL
>>> documentation is actually quite good (the hardest part is finding
>>> it!)
>>>
>>> Hope this helps,
>>> Brendon
>>>
>>>
>>>
>>> _______________________________________________
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>>> 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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