So I have this node that adds attributes to geo, specifically "size" and
"type", so that this geo can be rendered as some sort of particles,
downstream.
This node used to be derived from GeoOp, so geometry_engine() was called
by Nuke and added/modified these attributes.
But GeoOp being the base had the side effect that particle nodes
wouldn't accept it as an input. So now the node is derived from
ParticleBehavior. The problem is now that geometry_engine() is not
called anymore, when the downstream node is a ParticleOp of some sort.
Interestingly, geometry_engine() is still called when the node is
directly connected to a Scene (this is probably a bug in Nuke but it is
great because we want this to happen!)
What I want is a callback, like geometry_engine(), that allows me to
modify/add attributes on the incoming particles.
There is applyBehavior() and I use that successfully for "size" if the
input is particles. But if the input is geo, this doesn't work as the
geo doesn't have any size attribute. Also there seems to be no way to
add custom attributes in applyBehavior().
Any suggestions? I tried deriving the node from both bases but this gave
me lots of ambiguity errors that I could never completely get rid of.
I also think it wouldn't solve it because if the downstream node was a
ParticleOp, geometry_engine() wouldn't get called in any case, innit?
In short: how do I make a node that allows me to add attributes to
particles and which works as an input to Nuke particle nodes?
.mm
_______________________________________________
Nuke-dev mailing list
[email protected], http://forums.thefoundry.co.uk/
http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-dev
