leapDriver

leapDriver is a small userspace driver for the Leap Motion. The driver uses the uinput interface of the Linux kernel.

leapDriver is at the moment just able to simulate relative movements (like a mouse) and no absolute ones (like a touchpad)

License

leapDriver is licensed under the GPLv3. However, please be aware that the software under external has different licenses.

Compilation

To compile leapDriver you need the Leap Motion SDK. You can download it from:

https://developer.leapmotion.com/v2

You need to install the provided 64 bit Debian package (I haven't tested with 32bit).

Next you need to put the "LeapSDK" folder under "external/"

Now please type:

  mkdir build
  cd build
  cmake ../
  make

Installation

leapDriver supports Systemd. The files should work with an Ubuntu 16.04. I haven‘t tested for other Linux distributions.

To install type

  sudo make install

The leapDriver should work now. If not, please create a ticket at guthub.

Run

If you installed the driver with "make install" this is not necessary.

  sudo chmod a+rw /dev/uinput
  sudo leapd &
  ./leapdriver -c ../leap_driver_config.json

How to use the driver

Please place the Leap Motion in fornt of you. Now:

using one finger is interpreted as usual mouse movement. If you move your finger forward, the mouse pointer will lock. If you move your finger further, a click will be send.
using two fingers will be interpreted as a mouse wheel action (usual scrolling). You need to move your fingers wide enough forward to get an effect.

How to modify the behaviour

If you installed the leapDriver, you need to modify ´/etc/leap_driver_config.json´. Otherwise you need to modify the json you pass to leapDriver.

{
    "mouse_move_multipyer":3,
    "mouse_scroll_multipyer":0.75,
    "mouse_move_smooth_value":5,
    "mouse_scroll_smooth_value":3,
    "mouse_move_threashold":20,
    "mouse_click_prepare_value":-40,
    "mouse_click_value":-50,
    "mouse_click_release_value":-40,
    "mouse_wheel_thresold":-40,
    "vol_up_thr":30
}

mouse_move_multipyer factor for the speed of the mouse movement (float)
mouse_scroll_multipyer factor for the speed of the mouse scrolling (float)
mouse_move_smooth_value modifies the smoothing. More is smoother (int)
mouse_scroll_smooth_value modifies the smoothing. More is smoother (int)
mouse_move_threashold modifies the value when mouse action is triggered at all
mouse_click_prepare_value value when the mouse starts to lock
mouse_click_value value when a click happens
mouse_click_release_value value when the mouse click is released
mouse_wheel_thresold value when a scrolling is kicked off.
vol_up_thr not used at the moment.

Questions, Feadback and Bugs

Please be aware that this is a spare time project. Therefore, it might happen that I decide to put this project aside, not implement feature requests or not to fix bugs. However, feedback is still welcome.

If you do have any questions, feedback or a bug, pleas fill in a request on github, or send a mail to:

andreas . gocht + leapDriver [at] gmail.com

AndreasGocht/leapDriver