A skeleton tree gives a complete description of a rigid skeleton. It describes a tree structure over a list of nodes with their names indicat

@brief: a class to make sure the format could be used

An abstract plotter which deals with a plotting task. The children class needs to implement the functions to create/update the objects according t

Special json encoder for numpy types

Implementation to read/write to file. All class the is inherited from this class needs to implement to_dict() and from_dict()

A skeleton state contains all the information needed to describe a static state of a skeleton. It requires a skeleton tree, local/global rota