install_joystick(3alleg4)

✨ install_joystick — the "wake up, joystick bestie" ritual ✨

okay so this is a page from the Allegro manual (yes, that Allegro, the game programming library 👑) and it's all about install_joystick, the little function that gets your joystick awake, centred, and ready to vibe. Manual section 3alleg4, iykyk 💅

🌸 NAME 🌸

install_joystick — initialises the joystick. Allegro game programming library. That's it, that's the whole job description, and she does it well 🫶

🎀 SYNOPSIS 🎀

#include <allegro.h>

int install_joystick(int type);

💖 DESCRIPTION 💖

So basically: this installs Allegro's joystick handler, and it calibrates the centre position values. Two things. One call. Slay.

The type parameter should usually be JOY_TYPE_AUTODETECT — like, just let Allegro figure it out, she's smart. Or, if you're feeling extra, go check the platform specific documentation for a list of the available drivers 👀

🚨 Real talk, bestie: you must call this routine before using any other joystick functions. No exceptions. And you should make sure that all joysticks are in the middle position at the time — like, hands off, let them sit in the centre, they're meditating 🧘‍♀️

Here's the little example, verbatim, no cap:

textout_centre_ex(screen, font,
                  "Center the joystick and press a key",
                  SCREEN_W/2, SCREEN_H/2, red_color, -1);
readkey();
if (install_joystick(JOY_TYPE_AUTODETECT) != 0)
   abort_on_error("Error initialising joystick!");

See how she politely asks the player to centre the stick and press a key first? That's the vibe check. Then install_joystick(JOY_TYPE_AUTODETECT) does her thing, and if she returns something that isn't zero, abort_on_error("Error initialising joystick!") shows up like 😭

⭐ RETURN VALUE ⭐

Returns zero on success — periodt 💚

And here's the fun part: as soon as you have installed the joystick module, you'll be able to read the button state and the digital (on/off toggle) direction information, which honestly may be enough for some games. Not everything needs to be fancy!

But if you want the full analogue input, you're gonna need the calibrate_joystick() functions to measure the exact range of the inputs. See below. Go get that precision, queen 👑

🦋 SEE ALSO 🦋

• remove_joystick(3alleg4)
• num_joysticks(3alleg4)
• load_joystick_data(3alleg4)
• calibrate_joystick(3alleg4)
• calibrate_joystick_name(3alleg4)
• poll_joystick(3alleg4)
• exjoy(3alleg4)

mwah 💋 that's the whole page — brought to you by Allegro, version 4.4.3, in the manual as install_joystick(3alleg4). Go centre that stick and press a key, bestie 🌈💖✨