Leap JS

This is the js framework for working with the Leap.

Installation

Either grab the js file in the root of the project. There is a minified version there too.

If you're using npm, you can use npm install leapjs.

Usage

Using the javascript event loop

Leap.loop(function(frame) {
  // ... your code here
})

WARNING

Leap.loop uses requestAnimationFrame internally, which will not run inside the background page of a Chrome extension, due to Chrome's implementation of it.

In general, browsers optimize the load of requestAnimationFrame based on load, element visibility, battery status, etc. Chrome has chosen to optimize this by omitting the functionality altogether in the background.js of its extensions.

So, if you're hacking on a Chrome extension, and you need to receive frames inside background.js, the best solution for now is to use the "Do-it-yourself loop" described below.

Do-it-yourself loop

To use the leap motion api do the following...

var controller = new Leap.Controller();
controller.onFrame(function() {
  console.log("hello")
  console.log(controller.frame().id)
  console.log(controller.frame().fingers.length)
  console.log(controller.frame().finger(0))
})
controller.connect()

Examples

Inside the examples directory are a few great examples. To get them running, do the following:

• Run npm install
• Run ./node_modules/.bin/static .
• Point your browser at http://localhost:8080/examples and enjoy

Tests

There are currently rudamentary tests. To get them running, do the following:

• Run npm install
• Run rake test