| animator | The Animator evaluating the state machine. |
| stateMachinePathHash | The hash of the full path to the state machine. |
Invoked on the first update frame when taking a transition into a state machine. Implement this message to influence the entry transition into the sub-state machine.
Notes:
- This message will only be invoked when a State Machine entry transition is taken. It will not be invoked if a direct transition to a state machine sub-state is taken.
- Since this message is invoked during the evaluation of the state machine and can influence the transitions taken, implementing this message in your state machine prevents multithreaded state machine evaluation and may be a performance concern.