A game apparatus stores input positions detected by the input device at predetermined time intervals, in order of detection, into a memory of the game apparatus. Next, a trail vector indicating at least a portion of a trail drawn by the player on the input surface is calculated from the input positions....http://www.google.fr/patents/US7641551?utm_source=gb-gplus-shareBrevet US7641551 - Game program and game apparatus using input to pointing device
Game program and game apparatus using input to pointing device
