Unity使用Animator实现人物头部朝向鼠标

using UnityEngine;using System.Collections;public class LookAtTest : MonoBehaviour {private Animator _animator;private Vector3 _pos ;// Use this for initializationvoid Start () {_animator = GetComponent<Animator>();}void OnAnimatorIK(int layer){if (layer == 1) {Vector3 pos =  Camera.main.ScreenToWorldPoint (new Vector3(Input.mousePosition.x,Input.mousePosition.y,Camera.main.transform.position.z));_pos = Vector3.Lerp (_pos, pos, 0.075f);_animator.SetLookAtPosition (_pos);_animator.SetLookAtWeight (0.25f,0.5f,1f,1f,0.6f);}}}

说明：需要在动画的Layers上新建立一层，开启IK，这一层的Weight设置为1，Blending设置为Override。 因为如果直接在默认层设置，会影响之前的动画。