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[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