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Why are iTools so slow? [message #41133]

Wed, 29 September 2004 17:05

Mark Hadfield
Messages: 783
Registered: May 1995

Senior Member

The subject line says it, really.

I kind of like the idea of iTools, and I'd like to tap into the
framework for my own tools. (I've started to use property-sheet widgets,
but nothing else.) If I do

IDL> fsc_surface, dist(100)

or

IDL> mgh_new, 'mgh_surface', dist(100)

I can rotate the surface with the mouse smooth and fast (I'm guessing 20
or more redraws per second). But if I do

IDL> isurface, dist(100)

and choose the little rotate button then rotate the surface, each redraw
takes ~ 1 second. A surface with more points than that is unusable.
(Actually, cancel that last thought, I'm not sure if iTool speed
generally does deteriorate very fast with the number of vertices or
pixels in the graphic. Which is interesting.)

I thought it might be something to do with drag quality, so I reduced
the "Default Drag Quality" (in "File/Preferences") to "Low". So now the
surface goes wire-frame when I drag it. But it's still really slow.

Is it slow for you too?

Why?

--
Mark Hadfield "Ka puwaha te tai nei, Hoea tatou"
m.hadfield@niwa.co.nz
National Institute for Water and Atmospheric Research (NIWA)

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[Message index]

		Why are iTools so slow? By: Mark Hadfield on Wed, 29 September 2004 17:05
		Re: Why are iTools so slow? By: Mark Hadfield on Mon, 04 October 2004 17:29
		Re: Why are iTools so slow? By: Rick Towler on Mon, 04 October 2004 14:24

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