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install_joystick(3) Allegro manual install_joystick(3) NAME install_joystick - Initialises the joystick. Allegro game programming library. SYNOPSIS #include <allegro.h> int install_joystick(int type); DESCRIPTION Installs Allegro's joystick handler, and calibrates the centre position values. The type parameter should usually be JOY_TYPE_AUTODETECT, or see the platform specific documentation for a list of the available drivers. You must call this routine before using any other joystick functions, and you should make sure that all joysticks are in the mid- dle position at the time. Example: 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!"); RETURN VALUE Returns zero on success. As soon as you have installed the joystick module, you will be able to read the button state and digital (on/off toggle) direction information, which may be enough for some games. If you want to get full analogue input, though, you need to use the cali- brate_joystick() functions to measure the exact range of the inputs: see below. SEE ALSO remove_joystick(3), num_joysticks(3), load_joystick_data(3), cali- brate_joystick(3), calibrate_joystick_name(3), poll_joystick(3), exjoy(3) Allegro version 4.4.3 install_joystick(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO
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