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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Hi Randy- > can you explain what "fast rendering is" and how it is different from having > the option turned off. It turns off checking for data that crosses a projection seam which is an expensive computation. If you are displaying your data in the native projection, there is no need to check. See: http://www.unidata.ucar.edu/software/idv/release/nightly/docs/userguide/misc/PerformanceTuning.html#fastrender for more info. Don Murray > ----- Original Message ---- > From: Unidata IDV Support <address@hidden> > To: address@hidden > Cc: address@hidden > Sent: Tuesday, March 24, 2009 3:03:17 PM > Subject: [IDV #SUD-184603]: problem loading polar stereographic data into idv > > Randy- > > This is Don. Jeff and Yuan are both away this week. > > > Katie and I are both working this, thus her response below. To clarify > > alittle. > > > > 1) run IDV 2.6u2 and load 0.5 deg Global GFS. all raw data and formula > > computed loads correctly. > > 2) run IDV 2.7a1 and load 0.5 deg Global GFS. all raw data loads correctly > > but an isosurface of total winds does not display correctly. > > Turn on Fast Rendering and you'll see the other half. A change was > made between 2.6 and 2.7 on how projections are handled. We may > back out of that eventually, but you should have Fast Rendering turned > on by default anyway with the grids you are using. > > > We definetly see up to 800% CPU on the activity monitor now as it reads the > > data in. Before your email below i thought it was parrallelizing the > > formula computations. > > No, just reading and rendering. We'll look into computations later. > > > Katie will be trying volume rendering next. > > That will be an interesting experiment. > > Don Murray > > > > > > ----- Original Message ---- > > From: northrop grumman <address@hidden> > > To: address@hidden > > Sent: Tuesday, March 24, 2009 11:29:42 AM > > Subject: Re: [IDV #SUD-184603]: problem loading polar stereographic data > > into idv > > > > Hi there. So we played around with the thread count, using 2, 4, and 8 for > > both rendering and data reading. It works fine unless we do an isosurface. > > Then, only the left half of the data appears (the right half is missing). > > If I visualize the same thing in an older version of IDV, all the data is > > there. Also, plan views give us full (global) data but isosurfaces don't > > (only half, and no the data is not smushed, it's to the correct scale but > > the right half is not appearing). Any ideas of what is causing this? Screen > > shot attached so you get a better idea of the issue. > > > > Thanks! > > > > > > ----- Original Message ---- > > From: Unidata IDV Support <address@hidden> > > To: address@hidden > > Cc: address@hidden > > Sent: Monday, March 23, 2009 11:38:41 AM > > Subject: [IDV #SUD-184603]: problem loading polar stereographic data into > > idv > > > > > > > > Ok we'll give it a spin. do you think there will be a speed up when > > > applying a formula to the data for example calculating the total wind > > > from the u and v wind components? > > > > > > > Right we we don't parallelize the formula computations, just the final > > display rendering and the remote data reading. > > We will be looking at doing that in the future though. > > > > -Jeff > > > > > > Ticket Details > > =================== > > Ticket ID: SUD-184603 > > Department: Support IDV > > Priority: Emergency > > Status: Closed > > > > > > > > > > > > > Ticket Details > =================== > Ticket ID: SUD-184603 > Department: Support IDV > Priority: Emergency > Status: Open > > > > > Ticket Details =================== Ticket ID: SUD-184603 Department: Support IDV Priority: Emergency Status: Open