Many of us have been fighting this for years.
One of the quick& (very) dirty workarounds is to create a dummy node
that can be executed (i.e. CurveTool), execute it to force Nuke to
re-evaluate the stream, then delete it. Do this for every
iteration/frame and you should get the correct values if I remember
correctly.
I don't think the dummy node has to be connected to the nodes you are
working with but haven't done this in a while myself.
Afterwards don't forget to log a bug report to get this resolved
finally. Maybe we could ask for a flag to set that forces Nuke to
re-evaluate during a python loop, then set another flag to turn off that
behaviour again if it means staying more efficient.
Cheers,
frank
On 27/02/14 06:35, Elias Ericsson Rydberg wrote:
Maybe you could force it by adding a writegeo downstream. I would imagine that
would make nuke evaluate geometry positions upstream?
Maybe adding the positions as metadata in the stream could be a valid
alternative.
Cheers,
Elias
26 feb 2014 kl. 12:56 skrev Carl Schröter <ad...@l-rac.de>:
Hi guys,
I've been experimenting with vertexSelection lately (in nuke7) and noticed
something strange (at least it seems strange to me).
When I run the code below on selected vertices of an animated abc file, Nuke
does not update the vertex-position values in the loop. However, if gives me
the correct position when I execute it on single frames. To make it even
stranger: when I connect a scene-node to the ReadGeo, the code outputs 2 points
for the same selection on different positions in space.
##########
temp = nuke.nodes.CurveTool()
for frame in range(1100,1150):
nuke.execute(temp, frame, frame)
nuke.frame(frame)
selectedVertexInfo = nukescripts.snap3d.selectedVertexInfos() #it's the
same for selectedPoints()
print nuke.frame()
for point in selectedVertexInfo:
print point.index, point.objnum, point.position, point.value
print
nuke.delete(temp)
##########
To make my confusion complete: it sometimes (very rarely) just works as
expected...
Is there something I am missing here? A way to force update the 3d-system?
Also is there a way to get the geo containing node from selected points (so I
could temporarily disconnect the scene node downstream)?
Any help is greatly appreciated!
Cheers,
Carl
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