EyeGaze Edge

LC Technologies' EyeGaze Edge is a hardware-based eye-tracking solution. This is the source for an executable that can be compiled to communicate with the hardware and pass the data along to a listener.

Installation and Usage

The vendor can provided needed libraries and dlls that will need to be included. After that open build/EdgeTracker.sln and build as a Release target for a 32-bit architecture.

# install eyegaze_edge
npm install https://github.com/coughdrop/eyegaze_edge.git
md edge
cp node_modules/eyegaze_edge/build/Release/EdgeTracker.exe edge/EdgeTracker.exe
cp lc_libraries/*.dll edge/*.dll

var edge = require('eyegaze_edge');

edge.setup(function(state) {
  if(state.ready) {
    edge.listen();
    setInterval(function() {
      console.log(edge.ping());
    }, 50);
  }
});

setTimeout(function() {
  edge.stop_listening();
}, 10000);

Technical Notes

We use this library as part of our Electron app for CoughDrop. In order for it to work, it needs to be in the edge folder within the application, along with the required dlls provided by the vendor ([http://www.eyegaze.com]). As of publishing, the needed SDKs and documentation are available here: http://www2.eyegaze.com/updates/

Note that the init function of _eyegaze_edge.cc defines the method names that will be available to be called from JavaScript via a node import, as well as their mapping to internal methods. While additional methods may be available from the SDK, we keep the method called to a minimum here to keep consistency across libraries, and because this code is not fun to maintain.

When this library is installed, it should automatically be used by gazelinger.js if also installed.

Also note, the dlls have only been tested with the x86, not x64 which was not available at time of testing.

License

MIT