III. INTERFACE DESIGN
Fig. 2. The schematic of the system. The PC screen displays anexecuting PC-based FPS game. The smart phone is the controller of thePC game in this system.
We use the devices on the smart phone to implement the interface. Other than the basic functions, key-in, and mouse control, we will include different functions into the design of the game control interface by combining several devices on the smart phone according to the game. In our experiment, we use a first person shooting game (FPS) and a massive multiplayer online role-player game (MMORPG) as the test PC games. The devices may be used and their functions are as below:
A. G-sensor
Generally, we can use it to control the mouse cursor on the PC screen. In a game, we can use it to control motions such as moving forward, moving backward, and rotation as a player wishes, so that an analog joystick is not required.
B. Touch screen
Generally, we use it to input words and present some buttons with functions corresponding to the buttons on a
normal mouse. Besides, we use it to manipulate pages on a PC screen. In a game, it can display some buttons to execute commands such as attacking, reloading, and others. And also a menu can be displayed on it. [3]
C. Speaker
The speaker can play some sound effects, such as sounds of control or item actions.
D. Microphone
The microphone can be used for voice recognition, so some game commands will be given orally by players. It also works as a communicating radio. [4]
E. Camera
The front camera of the smart phone provides the function of video communication in a multiplayer game. It can also be used to take players’ photos so that they can use these photos in the game as their avatars.
F. Vibrator
The vibrator is triggered by certain actions or events, such as firing or getting hit.