Re: Masking data

Hi Renaud,

We've implemented some "resolution switching" logic that enables
a display to automatically downgrade its displayed data when
the user is actively manipulating it.  When the display sits idle
for a second or two, the full-resolution version of the data gets
swapped back in.

Run "java visad.util.ResSwitcher data" where "data" is the name
of a data file you'd like to see displayed.

See visad/util/'s main() method to see how to
link a ResSwitcher object to your display.  I'm curious to hear
how well it improves performance of your large 3-D cloud data.


At 03:05 AM 4/23/2002, you wrote:
>I'm displaying a cloud through a 3D display: 
>something like ( index -> (x,y,z,color) ) in Visad notation. 
>When you have more than 20000 vertices displayed , operations like rescaling 
>an axis are very slow. To deal with this issue, I had the idea to mask some 
>vertices. For example, with 50000 vertices, I would temporarily (during the 
>rescaling operation) display  only 1 out of 4 vertices. Does someone know an 
>efficient way to do that, i.e. without removing the reference data, and 
>creating a new one with only 12500 vertices ? 
>Thanks by advance. 
>Renaud DAÏAN

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