Well, if you already have keys, you don’t need to bake anything. You just need
to set keys on the Tracker at each frame.
One possible approach (somewhat crude and completely untested):
fr = nuke.root().frameRange()
dest = tracker['tracks']
for i in range(1, 5):
baseOffset = 31 * i + 1
curves = cornerpin['to%d' % i].animations()
for ci, curve in enumerate(curves):
curveOffset = baseOffset + ci
for f in fr:
dest.setValueAt(curve.evaluate(f), f, curveOffset)
Note that this relies on the corner-pin being animated. If there’s a chance
they may not be, you should check .isAnimated(index) on each corner and set a
static value if not.
-Nathan
From: Greg Radcliffe
Sent: Tuesday, March 05, 2013 7:27 AM
To: Nuke Python discussion
Subject: Re: [Nuke-python] Python in new tracker node.
Ah, that explains why those methods aren't working. In order to copy over a
curve, I have to loop bake the keys then loop copy per frame the key's over to
the new tracker?
That's seems excessive for a fairly simple task, is there any plans to make the
new Tracker more programming friendly?
On Mon, Mar 4, 2013 at 1:30 PM, Nathan Rusch <[email protected]> wrote:
Because the 'tracks' knob isn’t exposed as an Array_Knob (or a subclass
thereof), it doesn’t have .copyAnimation()/.copyAnimations() methods. And
because there isn’t another Python interface to the new Tracker, you’ll need to
loop through your CornerPin keys and manually set keys at the cell indices
you’re interested in (x pos = index 2, y pos = index 3 for the first track).
-Nathan
From: Greg Radcliffe
Sent: Monday, March 04, 2013 9:03 AM
To: [email protected]
Subject: [Nuke-python] Python in new tracker node.
Hello! I was am trying to copy over cornerpin data into a new tracker node
w/ 4 tracks that have the copied animations. I'm running into issues trying to
python with the new Tracker node. I finally figured out how to add a track
with .execute() but now I need to copy over an animation curve into the newly
created tracks.
Here's the code I am working on. How do I get python to assign the added
track to a variable? then How do I copy that animation over? I couldn't fine
any documentation about working with the new Tracker node.
cornerPin = nuke.selectedNode()
c1 = cornerPin['to1']
tracker = nuke.createNode('Tracker4')
tracker['add_track'].execute()
t = tracker['tracks']
c1.copyAnimations(t.animations(t['track_2']))
Thanks.
--
Greg Radcliffe
Compositor
www.phosphenefx.com
www.gregradcliffe.com
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--
Greg Radcliffe
Compositor
www.phosphenefx.com
www.gregradcliffe.com
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