In this chapter, we saw how different animated properties can be linked together and how we could constrain the spatial properties of objects to complex limitations. We have learned how to:
- Drive one IPO from another by a Python expression
- Work around some limitations inherent in pydrivers
- Restrict the motion of objects and bones by adding constraints
- Write a constraint in Python that will snap an object to the closest vertex on another object
Next we take a look at how to perform some action every time we advance a frame in our animation.
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