Mercurial > sdl-ios-xcode
view docs/man3/SDL_JoystickGetBall.3 @ 4368:4c088d2b29eb SDL-1.2
Fixed bug #861
C.W. Betts 2009-10-19 19:16:41 PDT
In 64-bit libraries, the fork reference is a different size than in 32-bit.
Apple has tried to help this transition by making a typedef called FSIORefNum,
but it is only available in Mac OS X 10.5 headers or later. I first noticed
this bug in Mac OS X's CD player code, and the patch is set to fix it
accordingly. This might also be an issue in SDL_QuartzVideo.m
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 20 Oct 2009 03:45:06 +0000 |
| parents | 1238da4a7112 |
| children |
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.TH "SDL_JoystickGetBall" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference" .SH "NAME" SDL_JoystickGetBall \- Get relative trackball motion .SH "SYNOPSIS" .PP \fB#include "SDL\&.h" .sp \fBint \fBSDL_JoystickGetBall\fP\fR(\fBSDL_Joystick *joystick, int ball, int *dx, int *dy\fR); .SH "DESCRIPTION" .PP Get the \fBball\fR axis change\&. .PP Trackballs can only return relative motion since the last call to \fBSDL_JoystickGetBall\fP, these motion deltas a placed into \fBdx\fR and \fBdy\fR\&. .SH "RETURN VALUE" .PP Returns \fB0\fR on success or \fB-1\fR on failure .SH "EXAMPLES" .PP .PP .nf \f(CWint delta_x, delta_y; SDL_Joystick *joy; \&. \&. \&. SDL_JoystickUpdate(); if(SDL_JoystickGetBall(joy, 0, &delta_x, &delta_y)==-1) printf("TrackBall Read Error! "); printf("Trackball Delta- X:%d, Y:%d ", delta_x, delta_y);\fR .fi .PP .SH "SEE ALSO" .PP \fI\fBSDL_JoystickNumBalls\fP\fR .\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00