On Tue, Dec 6, 2011 at 9:00 PM, Vivian Meazza <vivian.mea...@lineone.net> wrote:
>
> I'm not sure that this is correct. Nasal listeners don't mind if a property
> is tied or not - this must be true or else weather-utility.nas wouldn't work
> to "untie" properties for use by effects. Effects use c++ listeners, and
> these do care if a property is tied.

Nasal listeners are built on top of c++ listeners. The nasal wrapper
even logs a debug message if you attach a listener to a tied property,
presumably intended as a warning.
weather-utility.nas uses a timer loop triggered each frame to copy the
tied properties over. For some obscure reason it also uses a listener
coupled to one of the untied property nodes it updates in the loop. It
does not use listeners on tied properties.

-- 
Csaba/Jester

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