Offset between the position we touched in the screen and the torpedo initial location
Offset between the position we touched in the screen and the torpedo initial location

domenicosolazzo/practice-swift,hanhailong/practice-swift,nguyenantinhbk77/practice-swift,nguyenantinhbk77/practice-swift,hanhailong/practice-swift,domenicosolazzo/practice-swift,nguyenantinhbk77/practice-swift,domenicosolazzo/practice-swift,domenicosolazzo/practice-swift,hanhailong/practice-swift,nguyenantinhbk77/practice-swift,hanhailong/practice-swift