Sam Lantinga 7a56a51b0d Fixed bug: SDL2 Xinput joystick axis jumps from positive to negative
Franz Schrober

Attached is my patch. It ensures that the values are correctly limitted between -32767 and 32767 (otherwise the negator - and the conversion to sint16 would corrupt the result)

I am using Motioninjoy (Dualshock 3 Sixaxxis controller on Windows 7)  together with a recent SDL2 (post rc1) and noticed with the testjoystick binary that the axis 3 (left analog up/down) jumps when going in down direction from 32257 to -32768. This seems obviously wrong and I have never seen this before. In my games the people are now going backwards before they start to sprint forward when the player actually wants to run as fast as possible backwards. This also happens on the axis 2 (right analog stick up/down)

This problem doesn't happen in DX mode
2013-06-27 11:21:37 -07:00
2013-06-07 21:50:29 -07:00
2013-03-17 20:07:02 +08:00

                         Simple DirectMedia Layer

                                  (SDL)

                                Version 2.0

---
http://www.libsdl.org/

This is the Simple DirectMedia Layer, a general API that provides low
level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL,
and 2D framebuffer across multiple platforms.

The current version supports Windows, Mac OS X, Linux, FreeBSD,
NetBSD, OpenBSD, BSD/OS, Solaris, iOS, and Android. The code contains
support for other operating systems but those are not officially supported.

SDL is written in C, but works with C++ natively, and has bindings to
several other languages, including Ada, C#, Eiffel, Erlang, Euphoria,
Go, Guile, Haskell, Java, Lisp, Lua, ML, Objective C, Pascal, Perl, PHP,
Pike, Pliant, Python, Ruby, and Smalltalk.

This library is distributed under the zlib license, which can be found
in the file "COPYING".

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)

Description
SDL2 for the Nintendo Wii U (build with "cmake [SDL source path] -DCMAKE_TOOLCHAIN_FILE=$WUT_ROOT/share/wut.toolchain.cmake -DCMAKE_INSTALL_PREFIX=$DEVKITPRO/portlibs/wiiu")
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