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Bug 430

Summary: Mac OS X joystick code is busted...
Product: SDL Reporter: Ryan C. Gordon <icculus>
Component: joystickAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED DUPLICATE QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: HG 1.2   
Hardware: PowerPC   
OS: Mac OS X (All)   

Description Ryan C. Gordon 2007-05-28 20:51:53 UTC 
Date: Sun, 22 Apr 2007 17:18:16 -0600
From: "mike stedman"
To: sdl@libsdl.org
Subject: [SDL] Analogue joystick "sticks" on OS X

Hey all,

When working with analogue joysticks on Mac OS X (Logitech Wingman
Rumblepad, Microsoft Xbox360 wired controller) I notice that the stick gets
wedged in one direction at program initialization after I push it initially.

After I do a full circle on the stick it becomes "unstuck" but this looks
very unprofessional. Does anyone know what's going on here? I have deadzone
code, but the wedging seems to be near 100% in the direction opposite what I
just pressed.

>From what I can tell, if I start my program and push up-left on the
joystick, the game will respond to that slightly, but then repeatedly emit
down-right motion when I release the stick until I do a full circle with the
stick, after which point it acts normally.

Is SDL doing some kind of adaptive re-calibration, or is this the fault of
the OS X joystick driver? I haven't encountered this issue on Windows or
Linux and can't see anything in the archives about it. I am using the
SDL_Joystick code instead of the event interface, but will change over if
the bug is fixed there.

Any insight would be great, particularly if there's some sort of "hidden"
SDL_Joystick function to force recalibration.
-- 
Mike
http://rav.realitybytes.tk
Comment 1 Ryan C. Gordon 2007-05-28 20:52:15 UTC 
I can confirm this here. Looking into it...

--ryan.
Comment 2 Ryan C. Gordon 2007-05-28 22:32:56 UTC 
Whoops, this is a dupe, someone reported this a long time ago...

--ryan.



*** This bug has been marked as a duplicate of bug 344 ***