Sports : Tennis

Using math, java, OpenCV, OpenGL3D, and so on to build up this game

Brief descriptions and operations of this game are as follows:

(1)This game uses buttons, motion sensor, and front camera to control the swing, movement, and rotation of racket. This isn't an easy game but full of variety. It needs to practice all the time for knowing the operations well. This game is absolutely full of entertainment.

(2)There are 88 levels. By touching the panel, a popup menu will show up. The "Start" item can start to play this game. Don't block the front camera because this game need camera to detect the motion of palm. The illumination of environment can affect the detection.

(3)In the left side of panel, the first button can switch among moving, rotating, and ready mode for controlling the racket. The moving mode can automatically move the racket to right position by shaking the device to indicated direction.

The rotating mode can automatically rotate racket by shaking the device up or down. Before rotating the racket, player can fine-tuning the racket position by clicking the direction buttons.

Under rotating mode, clicking this button can switch to ready mode which can stop the rotation and ready for swinging. Moving palm to right, left, up, or down in front of camera can rotate the racket face up, down, left, or right, respectively. The flying direction of ball can be controlled by the direction of racket face.

(4)The middle button can swing the racket and increase the speed of swing. The bottom one can switch between forehand and backhand.

(5)There are 3 different court fields, e.g., red soil, grass, and cement. The different court fields contain different ball's bouncing coefficient.

There are 3 major levels, e.g., basic practice(4 levels), tennis wall(48 levels), and pitch machine(36 levels).

(6)A ball's landing spot will be displayed on the ground when the ball hits the wall or is pitched by pitch machine. Likewise, the other spot on the ground represents the racket's position. These spots may help player to choose the right position for hitting ball.