NAME
calibrate_joystick - Calibrates the specified joystick. Allegro game
programming library.
SYNOPSIS
#include <allegro.h>
int calibrate_joystick(int n);
DESCRIPTION
Most joysticks need to be calibrated before they can provide full
analogue input. This function performs the next operation in the
calibration series for the specified stick, assuming that the joystick
has been positioned in the manner described by a previous call to
calibrate_joystick_name(), returning zero on success. For example, a
simple routine to fully calibrate all the joysticks might look like:
int i;
for (i=0; i<;num_joysticks; i++) {
while (joy[i].flags & JOYFLAG_CALIBRATE) {
char *msg = calibrate_joystick_name(i);
textprintf_ex(..., "%s, and press a key\n", msg);
readkey();
if (calibrate_joystick(i) != 0) {
textprintf_ex(..., "oops!\n");
readkey();
exit(1);
}
}
}
RETURN VALUE
Returns zero on success, non-zero if the calibration could not be
performed successfully.
SEE ALSO
install_joystick(3alleg), calibrate_joystick_name(3alleg), joy(3alleg),
num_joysticks(3alleg), exjoy(3alleg)