FinalIK head-turning

This script allows characters to rely on FinalIK's Look At IK component when turning their head. To use it, add the Look At IK component to your character's base and configure it. Then, add the following code to the character, and assign the two fields.

FinalIKHeadTurn.cs

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using AC;

using RootMotion.FinalIK;



public class FinalIKHeadTurn : MonoBehaviour

{



	#region Variables



	[SerializeField] private LookAtIK lookAtIK;

	[SerializeField] private Char character;



	private Transform headTurnTarget;

	private LerpUtils.FloatLerp headWeightLerp = new LerpUtils.FloatLerp (true);

	private Vector3 offset;

	private float headWeight = 0f;

	private const float headTurnSpeed = 5f;



	#endregion





	#region UnityStandards



	private void OnEnable ()

	{

		EventManager.OnSetHeadTurnTarget += SetLookAtTarget;

		EventManager.OnClearHeadTurnTarget += ClearLookAtTarget;

	}





	private void OnDisable ()

	{

		EventManager.OnSetHeadTurnTarget -= SetLookAtTarget;

		EventManager.OnClearHeadTurnTarget -= ClearLookAtTarget;

	}





	private void Update ()

	{

		headWeight = headWeightLerp.Update (headWeight, (headTurnTarget != null) ? 1f : 0f, headTurnSpeed);

	}





	private void LateUpdate ()

	{

		if (lookAtIK)

		{

			if (headTurnTarget)

			{

				lookAtIK.solver.IKPosition = headTurnTarget.position + offset;

			}

			lookAtIK.solver.IKPositionWeight = headWeight;

		}

	}



	#endregion





	#region PublicFunctions



	public void SetLookAtTarget (Char character, Transform headTurnTarget, Vector3 offset, bool isInstant)

	{

		if (headTurnTarget != null && character == this.character)

		{

			this.headTurnTarget = headTurnTarget;

			this.offset = offset;



			if (isInstant)

			{

				headWeight = 1f;

				headWeightLerp.Update (1f, 1f, headTurnSpeed);

			}

		}

	}





	public void ClearLookAtTarget (Char character, bool isInstant)

	{

		if (character == this.character)

		{

			headTurnTarget = null;



			if (isInstant)

			{

				headWeight = 0f;

				headWeightLerp.Update (0f, 0f, headTurnSpeed);

			}

		}

	}





	public void ClearLookAtTarget (Transform _headTurnTarget)

	{

		if (headTurnTarget == _headTurnTarget)

		{

			headTurnTarget = null;

		}

	}



	#endregion



}