スクリーンから出たかどうかチェックする

CheckExitScreen.cs

void CheckExitScreen(){
		if (Mathf.Abs(_Rigidbody.position.x) > Camera.main.orthographicSize * Camera.main.aspect)	{
		    _Rigidbody.position = new Vector3(-Mathf.Sign(_Rigidbody.position.x) * Camera.main.orthographicSize * Camera.main.aspect, 0, _Rigidbody.position.z);
			  _Rigidbody.position -= _Rigidbody.position.normalized * 0.1f; // 反対側に移動
		}

		if (Mathf.Abs(_Rigidbody.position.z) > Camera.main.orthographicSize) {
			  _Rigidbody.position = new Vector3(_Rigidbody.position.x , _Rigidbody.position.y, -Mathf.Sign(_Rigidbody.position.z) * Camera.main.orthographicSize);
		  	_Rigidbody.position -= _Rigidbody.position.normalized * 0.1f; // 反対側に移動
		}
}