bionic (3) calibrate_joystick.3alleg4.gz

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(3alleg4),   calibrate_joystick_name(3alleg4),   joy(3alleg4),    num_joysticks(3alleg4),
       exjoy(3alleg4)