calibrate_joystick(3alleg4) Allegro manual calibrate_joystick(3alleg4)
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 calibra-
tion series for the specified stick, assuming that the joystick has been positioned in the manner described by a previous call to cali-
brate_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
", msg);
readkey();
if (calibrate_joystick(i) != 0) {
textprintf_ex(..., "oops!
");
readkey();
exit(1);
}
}
}
RETURN VALUE
Returns zero on success, non-zero if the calibration could not be performed successfully.
SEE ALSO
install_joystick(3alleg4), calibrate_joystick_name(3alleg4), joy(3alleg4), num_joysticks(3alleg4), exjoy(3alleg4)
Allegro version 4.4.2 calibrate_joystick(3alleg4)
