calibrate_joystick(3alleg4)

💖 calibrate_joystick — the Allegro manual, but make it make sense 💖

okay bestie, so this page is from the Allegro manual and it's all about calibrate_joystick(3alleg4). yeah, that's the man page name up there in the corner. sit down, grab a strawberry 🍓, we're doing joysticks.

✨ NAME ✨

calibrate_joystick — calibrates the specified joystick. it's part of the Allegro game programming library, no cap. 🎮

🦋 SYNOPSIS 🦋

#include <allegro.h>

int calibrate_joystick(int n);

that's it. one include, one function, one int. we love a minimal era. 💅

🌸 DESCRIPTION 🌸

so here's the tea: most joysticks need to be calibrated before they can actually give you full analogue input. like, they're out here raw and unready until you do this. 😭

calibrate_joystick performs the next operation in the calibration series for the stick you name — and it assumes you already moved the joystick the way a previous call to calibrate_joystick_name() told you to. so it's a little back-and-forth, a little dance, we love a two-step. 🧚

it returns zero on success. zero is the good number here, iykyk.

so like, a simple routine to fully calibrate all the joysticks might look like this:

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);
      }
   }
}

the way that loop just keeps going until JOYFLAG_CALIBRATE stops being set?? iconic. and if the calibration fails it literally prints "oops!\n" and bails out with exit(1). dramatic, but honestly? valid. 💀

ngl this is the verbatim snippet from the original page, typo in the loop condition and all. do not come for me, I am simply the messenger. 🙈

🔥 RETURN VALUE 🔥

• returns zero on success 🫶
• returns non-zero if the calibration could not be performed successfully 😭

that's it. that's the whole vibe check.

👑 SEE ALSO 👑

go read these next, bestie, they're the rest of the squad:

• install_joystick(3alleg4)
• calibrate_joystick_name(3alleg4)
• joy(3alleg4)
• num_joysticks(3alleg4)
• exjoy(3alleg4)

okay that's the whole page, mwah. 💋 this lil number is Allegro version 4.4.3, and yeah, the page name is still calibrate_joystick(3alleg4) — now go calibrate something and slay. 🌈✨