private void Update()
{
    float angleCamUnit = Vector3.Angle(trCamera.forward, trUnit.forward);
    AvatarDirection avatar = avatarConfig.GetAvatarByAngle(angleCamUnit);

    bool isFlip = false;
    if(avatar.IsCanFlip)
    {
        Vector3 cross = Vector3.Cross(trCamera.forward, trUnit.forward);
        isFlip = cross.y < 0;
    }

    rendererModel.sprite = avatar.Idle;
    rendererModel.flipX = isFlip;
}

public AvatarDirection GetAvatarByAngle(float directionAngleDeg)
{
    float smallestLengVel = float.MaxValue;
    AvatarDirection best = avatarDirections[0];
    foreach(var item in avatarDirections)
    {
        float angleDiff = Mathf.Abs(Mathf.DeltaAngle(directionAngleDeg, item.AngleDeg));

        if(angleDiff < smallestLengVel)
        {
            best = item;
            smallestLengVel = angleDiff;
        }
    }

    return best;
}