I need to create some dynamically named functions (defs) for an adaptable creature setup. Those functions are OnChanged Event PPG functions of a customProp inside a plugin. So they need to be callable as “%s_%s_OnChanged” % (customProp.Name, dynamicParameter.Name). I’ve downloaded your plugin and have tried to understand it but as you know I’m not a pro when it comes to classes and I’m still a bit lost. :S

I am wondering how to hack your code:

1- Which function do I need to modify to be able to pass customProp.Name and dynamicParameter.Name as arguments and it would give me back a callable function named: “%s_%s_OnChanged” % (customProp.Name, dynamicParameter.Name) ?

2- Which function I have to put my actual code into (the code that the properly renamed function would use – this function would need to know it’s own dynamicParameter.Name to be able to find some parts of the Rig it’s controlling) ?

3- What is the best way to create and organise these functions so that I can have different code (some FK/IK switching code and some completely different code for Elbow Locking as an example) depending on different dynamicParameter.Name?

Thanks for any help!

niko

As for the third, I don’t know if it is a COM thing or an XSI thing but the callbacks in XSI Plugins can’t just be callable items as defined by Python, they have to be methods or functions. If the callbacks could have been any callable we could have changed the call method in the Wrapper object to __call__ and we could have implemented the decorator as follows:

1
2

def dynamic(func):
    return Wrapper(func)

By doing it this way, the callback would have been the wrapper object itself and it would have eliminated the need to use im_self to go from the bound method to the instance.

In my opinion, if we could have done it that way, it would have made for cleaner code.

Hope this helps.

about im_self:

“Special read-only attributes: im_self is the class instance object, im_func is the function object; im_class is the class of im_self for bound methods, or the class that asked for the method for unbound methods);”

See User-defined method -> http://www.python.org/doc/2.2.3/ref/types.html

sys._getframe:

“- A new function (python 2.1) sys._getframe(), returns the stack frame pointer of
the caller. This is intended only as a building block for
higher-level mechanisms such as string interpolation.
”
http://www.python.org/download/releases/2.1/NEWS.txt