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# relabsd
Duplicates an input device to convert its relative axis into absolute ones.
## Why would you do that?
The main purpose of this program is to bypass an issue of 3DConnexion's SpaceNavigator (but other devices might also suffer from this issue).
Indeed, this device reports having relatives axis despite sending absolute values.
Here are some people having issues because of this:
* http://www.3dconnexion.com/forum/viewtopic.php?t=2688
* http://www.osculator.net/forum/archive/index.php/t-708.html
* http://www.gimpusers.com/forums/gimp-developer/6231-adding-spacenavigator-support#message29509
Relative axis make Simple DirectMedia Layer (SDL) consider the device as 2 dimentional track ball, whereas absolute ones are understood to be a 6 axis joystick (which, at least to me, seems about right).
## How?
### Dependencies
* CMake
* libevdev
### Compiling
```
$ mkdir build
$ cd build
$ cmake ..
```
### Running
```
# ./relabsd /dev/input/spacenavigator ../conf/space_navigator.conf
```
### Results
(Using [Grumper's sdl-jstest](https://github.com/Grumbel/sdl-jstest))
**SDL 1:**
```
$ ./sdl-jstest --list
Found 1 joystick(s)
Joystick Name: 'relabsd device'
Joystick Number: 0
Number of Axes: 6
Number of Buttons: 2
Number of Hats: 0
Number of Balls: 0
```
**SDL 2:**
```
$ ./sdl2-jstest --list
Found 2 joystick(s)
Joystick Name: '3Dconnexion SpaceNavigator'
Joystick GUID: 030000006d04000026c6000011010000
Joystick Number: 0
Number of Axes: 0
Number of Buttons: 2
Number of Hats: 0
Number of Balls: 1
GameController:
not a gamepad
Joystick Name: 'relabsd device'
Joystick GUID: 030000006d04000026c6000011010000
Joystick Number: 1
Number of Axes: 6
Number of Buttons: 2
Number of Hats: 0
Number of Balls: 0
GameController:
not a gamepad
```
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