The part that might not work

Bauble

https://github.com/whiteoctober/bauble

var b = new Bauble({worker:'lib/js/bauble-worker.js'})
b.getUserMedia()
    .attach('body')
    .on('point', function(x,y){
    	// do something awesome!!
    });

// click #mybutton to calibrate
mybutton.onclick = function(){
  bauble.setCalibrating(false);
}