void OnTriggerEnterAXE(Collider other)
    {
        GroupObject obj = other.GetComponent <GroupObject>();

        if (obj && obj.tag == "tree")
        {
            FBParticleManager.PlayEffect(FBParticleManager.HIT_ANIMAL, 2, other.ClosestPoint(this.transform.position));
            FBSoundManager.Play(FBSoundManager.HIT_SOFT);
            obj.UpdateHP(-AXE_DAMAGE);
        }
    }
    public void OnTriggerEnterGunBullet(Collider other)
    {
        //check collide with animal group Object
        GroupObject obj = other.GetComponent <GroupObject>();

        if (obj && obj.tag == "animal")
        {
            FBSoundManager.Play(FBSoundManager.HIT_SOFT);
            obj.UpdateHP(-BULLET_DAMAGE);
        }
        else if (obj)
        {
            PopupManager.ShowWrongSignal(this.transform.position);
        }
        FBPoolManager.instance.returnObjectToPool(this.gameObject);
    }