node-red-contrib-leap-motion/swips.js

Node-Red nodes for leap motion

var Leap=require('leapjs');
var RED = require(process.env.NODE_RED_HOME+"/red/red");
module.exports = function (RED) {
  function Constructor (config) {
    RED.nodes.createNode(this, config);
    var node = this;


    var controller = Leap.loop({enableGestures: true}, function(frame){
      if (frame.gestures.length > 0) {
        for (var i = 0; i < frame.gestures.length; i++) {
          var gesture = frame.gestures[i];

          if(gesture.type == "swipe") {
              //Classify swipe as either horizontal or vertical
              var isHorizontal = Math.abs(gesture.direction[0]) > Math.abs(gesture.direction[1]);
              //Classify as right-left or up-down
              if(isHorizontal){
                  if(gesture.direction[0] > 0){
                      swipeDirection = "right";
                      node.send({payload:"swipright"});
                  } else {
                      swipeDirection = "left";
                      node.send({payload:"swipleft"});
                  }
              } else { //vertical
                  if(gesture.direction[1] > 0){
                      swipeDirection = "up";
                      node.send({payload:"swipup"});
                  } else {
                      swipeDirection = "down";
                      node.send({payload:"swipdown"});
                  }
              }

           }
         }
      }
    });
  }
  RED.nodes.registerType('swips', Constructor)
}