Hi Python community.
I know the question has surely be asked before but I can't find
information about this...
I've read the documentation there:
http://docs.thefoundry.co.uk/nuke/63/pythondevguide/metadata.html#createmetadatcam
The given example create a camera animated (baked) using metadatas.
This in interesting so I've tried to use expression to set camera
position directly from metadatas without bake them, just "on the fly".
I've created a lttle sequence of frame with a "exr/pos" calue wich is
the frame number. So test.0001.exr has "exr/pos" value of 1,
test.0002.exr has "exr/pos" value of 2, etc...
There is my camera translateX expression:
ret=float(nuke.toNode("Read1").metadata()["exr/pos"])
print ret, nuke.frame()
The problem is the "ret" value isn't always the value it should be.
Manytime, my expresion print: 3.0 4 or even 3.0 5
And once a bad value has been setted, I suppose this value is stored in
a cache because my expression is not evaluated again when I change
frame... :(
So I ask you guys, is there a way to make expressions work?
Thanks in advance for any suggestion.
Regards,
Dorian
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