Animator工具函数收集

1) 获取AnimationClip

public static bool TryGetAnimatorClip(Animator animator, string clipName, out AnimationClip outClip)
{
    var clips = animator.runtimeAnimatorController.animationClips;
    for (var i = 0; i < clips.Length; ++i)
    {
        var clip = clips[i];
        if (clip.name == clipName)
        {
            outClip = clip;
            return true;
        }
    }

    outClip = null;
    return false;
}

2) 另一种获取AnimationClip

public static bool TryGetAnimatorClip(Animator animator, int layerIndex, string clipName, out AnimationClip outClip)
{
    var clipInfo = animator.GetCurrentAnimatorClipInfo(layerIndex);
    for (var i = 0; i < clipInfo.Length; ++i)
    {
        var clip = clipInfo[i].clip;
        if (clip.name == clipName)
        {
            outClip = clip;
            return true;
        }
    }

    outClip = null;
    return false;
}

3) 状态切换

public static void ForceCrossFade(Animator animator, string name, float transitionDuration, int layer = 0, float normalizedTime = float.NegativeInfinity)
{
    if (animator.GetNextAnimatorStateInfo(layer).fullPathHash == 0)
    {
        animator.CrossFade(name, transitionDuration, layer, normalizedTime);
    }
    else
    {
        animator.Play(animator.GetNextAnimatorStateInfo(layer).fullPathHash, layer);
        animator.Update(0);
        animator.CrossFade(name, transitionDuration, layer, normalizedTime);
    }
}

4) 状态机中是否有某个状态

public static bool HasState(Animator animator, string stateName, int layerIndex = 0)
{
    var stateId = Animator.StringToHash(stateName);
    return animator.HasState(layerIndex, stateId);
}