[Unity动画]04.Avatar Mask

参考链接：

https://www.cnblogs.com/hammerc/p/4832637.html

Avatar Mask主要用于动画层融合。例如说，边跑边举起东西，这个实际上就是下半身播放跑步动画，上半身播放举起动画，所谓的Avatar Mask就是播放动画时让身体的某些部位不起作用(即不播放动画)

1.添加一个新的动画层

其中Empty是一个空的动画，同时添加一个Trigger型参数wave

TestAnimator.cs

using UnityEngine;

public class TestAnimator : MonoBehaviour {

    //------------------------------------------外部
    public float Move = 0;
    public bool IsDying = false;

    //------------------------------------------内部
    private Animator animator;

    //常数
    private int baseLayerIndex;
    private int idleStateHash;
    private int runStateHash;
    private int dyingStateHash;
    private string movePara;
    private string isDyingPara;
    private string wavePara;

    void Start ()
    {
        animator = GetComponent<Animator>();

        baseLayerIndex = animator.GetLayerIndex("Base Layer");
        idleStateHash = Animator.StringToHash("Base Layer.Idle");
        runStateHash = Animator.StringToHash("Base Layer.Run");
        dyingStateHash = Animator.StringToHash("Base Layer.Dying");
        movePara = "move";
        isDyingPara = "isDying";
        wavePara = "wave";
    }
    
    void Update ()
    {
        //------------------------------------------播放动作
        animator.SetFloat(movePara, Move);
        if (IsDying)
        {
            animator.SetBool(isDyingPara, true);
            IsDying = false;
        }

        //------------------------------------------动作恢复
        AnimatorStateInfo stateInfo;
        int fullPathHash;

        //BaseLayer
        stateInfo = animator.GetCurrentAnimatorStateInfo(baseLayerIndex);
        if (!animator.IsInTransition(baseLayerIndex) && stateInfo.normalizedTime >= 1)
        {
            fullPathHash = stateInfo.fullPathHash;
            if (fullPathHash == dyingStateHash)
            {
                animator.SetBool(isDyingPara, false);
            }
        }
    }

    public void SetDying(bool state)
    {
        if (animator)
        {
            animator.SetBool(isDyingPara, state);
        }
    }

    public void TriggerWave()
    {
        if (animator)
        {
            animator.SetTrigger(wavePara);
        }
    }

    public void ActionCallBack(string s)
    {
        if (s == "dyingStart")
        {
            Debug.Log("111");
        }
        else if (s == "dying")
        {
            Debug.LogWarning("222");
        }
        else if (s == "dyingEnd")
        {
            Debug.LogError("333");
        }
    }
}

NewBehaviourScript.cs

using UnityEngine;

public class NewBehaviourScript : MonoBehaviour {

    public TestAnimator testAnimator;
        
    void Update ()
    {
        if (Input.GetKeyDown(KeyCode.Q))
        {
            testAnimator.Move = 1;
        }
        if (Input.GetKeyDown(KeyCode.W))
        {
            testAnimator.TriggerWave();
        }
    }
}

效果如下。按下Q，播跑步动画，再按下W，覆盖为招手动画。可以试着将这两个层的位置换一下。可以看出，动画层越后优先级越高；同时还受动画层的权重影响。

2.创建一个Avatar Mask并添加到动画层中

如下图2，表示该动画层中只有上半身起作用

效果如下。按下Q，播跑步动画，再按下W，上半身播招手动画。