mirror of
https://github.com/encounter/SDL.git
synced 2025-05-18 13:21:27 +00:00
5697089d98
Denis Bernard Background information: http://developer.android.com/reference/android/hardware/SensorEvent.html#values Steps to reproduce: compile testjoystick.c as an android app (change screen size according to your device). While running the app, also run: adb logcat -c; adb logcat -s 'SDL:*' 'SDL/APP:*' When tilting the device left/right, the joystick moves in the opposite direction of what one would expect. Or at least, the behaviour is not consistent with the Y axis. Also when the device sits on a table (obviously not moving), the Z axis value oscillates between -32000 and +32000 (by overflow): I/SDL/APP ( 1994): Joystick 0 axis 2 value: 32511 I/SDL/APP ( 1994): Joystick 0 axis 2 value: 32575 I/SDL/APP ( 1994): Joystick 0 axis 2 value: 32383 I/SDL/APP ( 1994): Joystick 0 axis 2 value: -32386 I/SDL/APP ( 1994): Joystick 0 axis 2 value: -32450 I/SDL/APP ( 1994): Joystick 0 axis 2 value: -32578 This is caused by the accelerometer yielding a constant value around 9.81 for Z and feeding something like 0.9 to 1.1 to the joystick driver, resulting in the overflow. Proposed fix in SDLActivity.java (swap X and subtract G from Z reading)
Simple DirectMedia Layer
(SDL)
Version 2.0
---
http://www.libsdl.org/
Simple DirectMedia Layer is a cross-platform development library designed
to provide low level access to audio, keyboard, mouse, joystick, and graphics
hardware via OpenGL and Direct3D. It is used by video playback software,
emulators, and popular games including Valve's award winning catalog
and many Humble Bundle games.
SDL officially supports Windows, Mac OS X, Linux, iOS, and Android.
Support for other platforms may be found in the source code.
SDL is written in C, works natively with C++, and there are bindings
available for several other languages, including C# and Python.
This library is distributed under the zlib license, which can be found
in the file "COPYING.txt".
The best way to learn how to use SDL is to check out the header files in
the "include" subdirectory and the programs in the "test" subdirectory.
The header files and test programs are well commented and always up to date.
More documentation and FAQs are available online at:
http://wiki.libsdl.org/
If you need help with the library, or just want to discuss SDL related
issues, you can join the developers mailing list:
http://www.libsdl.org/mailing-list.php
Enjoy!
Sam Lantinga (slouken@libsdl.org)