Heeeelp! Questions about model data monitoring and callbacks?

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1

I am interested in utilizing the X coordinates of a model to drive a list of Shape keys, but I am unsure about how to implement this functionality.
For instance, if I create a combination of shapekeys for a smiling expression (using a list), how can I make Blender actively monitor changes in the X coordinate and trigger the corresponding shapekey combination?

2

Welcome :tada:…

There are vast posibilties to control almost anything via drivers, python and geometry nodes. Controlling the facial expression via the x-coordinate of a model… seems a bit weird… or do you mean by “any” controlling object ??

You may have to elaborate this to get a more suited answer.

3

I am not very familiar with geometric nodes, so I may not be able to articulate my thoughts clearly. Currently, I can only manipulate one expression at a time using a single controller, such as the eyes, mouth, and eyebrows. However, I would like to control multiple shapekeys with just one controller. My initial idea was to encapsulate the desired combination of ShapeKeys in Python using a List and then utilize model displacement for control. However, I am unsure how changes in the model’s shift would trigger corresponding changes in all the ShapeKeys within this list. If you have any better solutions or suggestions, please kindly enlighten me.

4

You do not have to know anything about geometry nodes to clearify your goals…

You may look up something like custom facial (or body) controller (rig)…

…for example this ( is even not using any shapekeys…)

:interrobang:

5

I aim to utilize a singular controller to govern the amalgamation of multiple components within the expression, however, I am currently unable to discern the appropriate methodology. With further familiarity with Blender’s mechanics, perhaps my desired outcome can be attained.

Actually, I specialize in cartoon animation as a means of convenience, but your plan has motivated me to reconsider. Although I am capable of using emoticon capture, I find that it falls short compared to manual production. Thank you for your thoughtful response.