get_mouse_mickeys - How far the mouse has moved since the last call to this
function. Allegro game programming library.
#include <allegro.h>
void get_mouse_mickeys(int *mickeyx, int *mickeyy);
Measures how far the mouse has moved since the last call to this function. The
values of mickeyx and mickeyy will become negative if the mouse is moved left
or up, respectively. The mouse will continue to generate movement mickeys even
when it reaches the edge of the screen, so this form of input can be useful
for games that require an infinite range of mouse movement.
Note that the infinite movement may not work in windowed mode,
since under some platforms the mouse would leave the window, and may not
work at all if the hardware cursor is in use.
install_mouse(3), exmouse(3)