Hello,I want to know how you define the muscle path, and are there any methods or principles for defining the muscle path? How can I determine the path of a specific shaped muscle?

How to determine these coordinate values of the path point ? How to determine these path point coordinates based on the existing muscle shape ?

I'm using Python to realize the simulation of human skeletal muscle model, but in the process of muscle processing, I don't know how to get the specific position of muscle force line? Can you tell me how to get the coordinates? Thank you.