Unity3D: Broadcast message to all object in state machine behaviour.

AnimationBroadcastStateMachineBehaviour.cs

using System.Text.RegularExpressions;

using UnityEngine;

public class AnimationBroadcastStateMachineBehaviour : StateMachineBehaviour {

	// Could not find the way to get current state name.
	// So end up with this. Define variable again.
	public string stateName;

	// Clean up white space before use.
	public string StateName {
		get {
			return Regex.Replace(stateName, @"\s+", "");
		}
	}

	public bool onStateEnter;

	public bool onStateExit;

	public bool onStateMove;

	public bool onStateUpdate;

	public bool onStateMachineEnter;

	public bool onStateMachineExit;

	public override void OnStateEnter(Animator animator, AnimatorStateInfo stateInfo, int layerIndex) {
		if (!string.IsNullOrEmpty(StateName)) {
			Broadcast(string.Format("On{0}StateEnter", StateName), new StateMachineBehaviourArgs(animator, stateInfo, layerIndex, StateName));
		}
	}

	public override void OnStateExit(Animator animator, AnimatorStateInfo stateInfo, int layerIndex) {
		if (!string.IsNullOrEmpty(StateName)) {
			Broadcast(string.Format("On{0}StateExit", StateName), new StateMachineBehaviourArgs(animator, stateInfo, layerIndex, StateName));
		}
	}

	public override void OnStateMove(Animator animator, AnimatorStateInfo stateInfo, int layerIndex) {
		if (!string.IsNullOrEmpty(StateName)) {
			Broadcast(string.Format("On{0}StateMove", StateName), new StateMachineBehaviourArgs(animator, stateInfo, layerIndex, StateName));
		}
	}

	public override void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex) {
		if (!string.IsNullOrEmpty(StateName)) {
			Broadcast(string.Format("On{0}StateUpdate", StateName), new StateMachineBehaviourArgs(animator, stateInfo, layerIndex, StateName));
		}
	}

	public override void OnStateMachineEnter(Animator animator, int stateMachinePathHash) {
		if (!string.IsNullOrEmpty(StateName)) {
			Broadcast(string.Format("On{0}StateMachineEnter", StateName), new StateMachineBehaviourArgs(animator, stateMachinePathHash, StateName));
		}
	}

	public override void OnStateMachineExit(Animator animator, int stateMachinePathHash) {
		if (!string.IsNullOrEmpty(StateName)) {
			Broadcast(string.Format("On{0}StateMachineExit", StateName), new StateMachineBehaviourArgs(animator, stateMachinePathHash, StateName));
		}
	}

	private void Broadcast(string functionName, object arg = null) {
		var gameObjects = GameObject.FindObjectsOfType<GameObject>();
		foreach (var go in gameObjects) {
			// Only root game object.
			if (go && go.transform.parent == null) {
				go.BroadcastMessage(functionName, arg, SendMessageOptions.DontRequireReceiver);
			}
		}
	}

}