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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.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 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 >>> >>> >>> >>> _______________________________________________ >>> 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/ _______________________________________________ idvusers mailing list idvusers@xxxxxxxxxxxxxxxx For list information, to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/
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