Okay, I don't know how to script with python but figured I'd better try.

I have a simple rig with a switch sop that is controlling which LOD of geometry I wish to display.
The switch has a range of 0-2, with the default at 1. The 0 setting shows no geometry, just bones. However I've turned off the visibility of some of the bones, when I'm displaying the geometry.
What I'd like to do is set a callback script so that when I change the switch to 0 all the bone display flags are turned on.

So I'm thinking it will be something like,

if switch < 1, setDisplayFlag on “bones”, 0

I don't know the correct syntax.

Who can help me?

but you want to put this callback script in HDA definition, right?
If so, this should be put to PythonModule script section of HDA:

def switchDisplay(self):

def childrenFlags(self, val, type='bone'):
for child in self.children():
if child.type().name() == type:
child.setDisplayFlag(val)


if self.parm('switch').eval() == 0: childrenFlags(self, 0, ‘bone’)
else: childrenFlags(self, 1, ‘bone’)


Then in callback field of your parameter called ‘switch’ (like integer):

hou.pwd().hdaModule().switchDisplay(hou.pwd())

This switches display flags Off and On for all bones in subnetwork.

I think something has changed in callback area in 9.1 but I'm not sure what.

hope this help,
sy.

EDIT:
fixed type().name() method

Hey, that works like a charm. Thanks Sy.

I reversed the display values since I want the bones visible on 0.

I need to modify the code to act on node names rather than type.