.TH joystick_update 3 "14 April 1998" "Svgalib 1.3.0" "Svgalib User Manual"
.SH NAME
joystick_update \- query joysticks for status changes
.SH SYNOPSIS

.B "#include <vgajoystick.h>"

.BI "int joystick_update(void);

.SH DESCRIPTION
queries all currently opened joysticks for position changes and calls the appropriate
event handlers.

A non-zero value is returned if and only if any joystick reported a position change. In more
detail the logical and of the return value and
.BI "(1 << " joydev )
is non-zero if this joystick status changed.

.SH CAVEATS
This function is only available in ELF versions of svgalib. Due to backwards
compatibility issues it cannot be used with shared a.out libs.

.SH SEE ALSO

.BR svgalib (7),
.BR vgagl (7),
.BR libvga.config (5),
.BR joytest (6),
.BR mjoytest (6),
.BR joystick_init (3),
.BR joystick_close (3),
.BR joystick_sethandler (3),
.BR joystick_setdefaulthandler (3),
.BR joystick_getnumaxes (3),
.BR joystick_getnumbuttons (3),
.BR joystick_getaxis (3),
.BR joystick_getbutton (3),
.BR joystick_button1 (3),
.BR joystick_getb1 (3),
.BR joystick_x (3),
.BR joystick_getx (3).

.SH AUTHOR

The svgalib joystick handler was mostly done by Daniel Engstr\\"om <daniel.engstrom@riksnett.no>.
Multiple joystick, VC switching support and code to glue it into svgalib by Michael Weller
<eowmob@exp-math.uni-essen.de>. Part of the code is based on code from C. Smith and
Vojtech Pavlik.