Version: 2017.3
public void OnStateMachineEnter (Animator animator, int stateMachinePathHash);

Parameters

animator The Animator playing this state machine.
stateMachinePathHash The full path hash for this state machine.

Description

Called on the first Update frame when making a transition to a StateMachine. This is not called when making a transition into a StateMachine sub-state.

The evaluation flow must pass by an Entry node to actually get this callback.