That definitely sounds like an issue worth reporting.
-Nathan
From: Richard Bobo
Sent: Friday, November 22, 2013 7:48 PM
To: Nuke Python discussion
Subject: [Nuke-python] Re: Python Expression in Switch node not updating...
OK, I think I found a way to make sure that the “ret” value gets used… I added
another line to explicitly set the “which” knob value to “ret":
if 'SE_Preferred' in nuke.thisView():
ret = 0
nuke.thisKnode.knob(‘which’).setValue(ret)
elif 'Sport' in nuke.thisView():
ret = 1
nuke.thisKnode.knob(‘which’).setValue(ret)
elif 'Limited_Tech' in nuke.thisView():
ret = 2
nuke.thisKnode.knob(‘which’).setValue(ret)
In any case, just using the “ret” variable did not work very well at all.
Setting the knob explicitly with thisNode.knob worked while switching views in
Nuke. And rendering on the farm…? Well, that worked too! ...Except for one
frame, which was still wrong. Go figure...
So, on Monday, I think I will add one more setValue command to each section and
see if hitting it with a hammer twice makes it work 100% of the time for
rendering… Maybe I need a bigger hammer… (8^\
Happy Weekend,
Rich
On Nov 22, 2013, at 3:32 PM, Richard Bobo <richb...@mac.com> wrote:
Hi,
I'm having a problem with getting an expression-driven Switch node to
reliably update. And, I'm wondering if this a known problem or if I need to do
something different with my expression...?
-- In my Switch node, I have an expression on the "which" knob like this:
if 'SE_Preferred' in nuke.thisView():
ret = 0
elif 'Sport' in nuke.thisView():
ret = 1
elif 'Limited_Tech' in nuke.thisView():
ret = 2
(Yes, I have all of the expression option buttons turned on for multi-line,
Python mode and using the "ret" variable...)
So, based on my selected view, the switch should change the knob - and it
does... sort of. For example, if I use the views hotkeys to go through all the
views, one by one, it switches, but it is always one view change behind. The
updating seems to lag - like maybe the Python is being evaluated, but the
switch is not updating until the next time around. And, when I render my script
on the farm, the switch does not seem to be evaluating correctly at all.
Is there some way to force an update on the switch or is this just a bug...?
Thanks for any help,
Rich
Rich Bobo
Senior VFX Compositor
Armstrong-White
http://armstrong-white.com/
Email: richb...@mac.com
Mobile: (248) 840-2665
Web: http://richbobo.com/
"The world stands aside to let anyone pass who knows where he is going."
- David Starr Jordan
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