| Re: FG-arithmetic error and moving objects [message #90457 is a reply to message #90454] |
Tue, 03 March 2015 06:28   |
Yngvar Larsen
Messages: 134
Registered: January 2010
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Senior Member |
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Sounds like some kind of event loop bug in combination with the FG equivalent of this:
http://www.exelisvis.com/docs/DEVICE_Procedure.html#devices_ 517620971_499029
On Tuesday, 3 March 2015 15:00:15 UTC+1, David Fanning wrote:
> What it does do, and this made me think I was either going crazy or the
> coffee was especially strong this morning, is cause faint (you might say
> subliminal) yellow copies of the circle to appear at random locations in
> the window, even when I stop moving the mouse! It is one of the
> damnedest things I've ever seen in IDL. :-)
>
> Oh, now as I stare at the window, I occasionally see a cyan version of
> the line popping into momentary existence, too. This must be what it is
> like to chase subatomic particles in a bubble chamber. I thought at
> first this must have something to do with my glasses, but it happens
> when I hold my head completely still. It is like a memory of the two
> objects flickering into and out of existence. Fascinating!
--
Yngvar
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