Object to represent a ball that bounces off walls. More...
#include <TUM_Ball.h>
Data Fields | |
| signed short | x |
| signed short | y |
| float | f_x |
| float | f_y |
| float | dx |
| float | dy |
| float | max_speed |
| unsigned int | colour |
| signed short | radius |
| callback_t | callback |
| void * | args |
Detailed Description
Object to represent a ball that bounces off walls.
A ball is created with a starting X and Y location (center of the ball), initial X and Y axis speeds (dx and dy respectively), as well as a limiting maximum speed, a colour and a radius. A callback function can be passed to the ball creation function createBall with the form void (*callback)(void), which is called each time the ball collides with a wall.
The absolute location of the ball is stored in the floats f_x and f_y, this is to avoid situation where the ball is moving so slowly that it cannot escape its current pixel as the rounding performed during integer mathematics is causing the ball to become trapped on a pixel.
The colour of the ball is a 24bit hex colour code of the format RRGGBB.
A ball is created with initial speeds (dx and dy) of zero. The speed of the ball must be set to a non-zero value using setBallSpeed before the ball will start to move.
Field Documentation
◆ args
| void* ball::args |
Collision callback args
◆ callback
| callback_t ball::callback |
Collision callback
◆ colour
| unsigned int ball::colour |
Hex RGB colour of the ball
◆ dx
| float ball::dx |
X axis speed in pixels/second
◆ dy
| float ball::dy |
Y axis speed in pixels/second
◆ f_x
| float ball::f_x |
Absolute X location of ball
◆ f_y
| float ball::f_y |
Absolute Y location of ball
◆ max_speed
| float ball::max_speed |
Maximum speed the ball is able to achieve in pixels/second
◆ radius
| signed short ball::radius |
Radius of the ball in pixels
◆ x
| signed short ball::x |
X pixel coord of ball on screen
◆ y
| signed short ball::y |
Y pixel coord of ball on screen
The documentation for this struct was generated from the following file:
