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📲 multi-device hardware data synchronization for mobile browsers

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nunchuck.js

A library for mobile web-based control of browser applications.

Overview

We provide a library that easily allows developers to integrate mobile browser controls into desktop browser-based javascript games with very few (<15) lines of code.

Made with ❤️ at YCHacks 2014!

Pull requests and feature suggestions are welcome.

Demo

Plane Game

You can play our multiplayer fighter plane demo by navigating to http://nunchuckjs.com in any desktop browser.

Use your phone as a controller by navigating to http://nunchuckjs.com on a mobile browser, then selecting "CONNECT." Then, choose a username and enter the room ID on the screen of the desktop browser. You will see a plane spawn in the screen that responds to your phone's movements.

Tilt left or right to steer. Tilt forward to accelerate or backwards to decelerate. Press A to fire bullets. Don't run into other planes or bullets, or your plane will crash! Press start to respawn.

Mario Kart

You can play our multiplayer MarioKart demo by navigating to http://nunchuckjs.com/snes in any desktop browser.

Use your phone as a controller by navigating to http://nunchuckjs.com on a mobile browser, then selecting "GAMEPAD." You will then be able to use the arrowkeys to select a character. Tilt your phone down or press "B" to select.

Tilt left or right to steer, and tilt forwards and backwards to accelerate and decelerate, respectively. Press A to use items.

Quickstart

Download nunchuck.js and refer to it in any html file to get started!

// Socket code in app.js
require('./server/nunchuck-server')(io);
// Web browser view
<script src="path/to/nunchuck.js"></script>
<script>
	var socket = io();
	var n = nunchuck.init('host', socket);
    n.onJoin(function(data){
        // do something with data from sender

        n.receive(function(data){
        	// do something with data from sender
        })
    });
</script>

Documentation

Buttons

nunchuck.js responds to both acceleration and button push events. You can customize the buttons in the mobile browser view. Assign each button a class "nunchuck-button." Also assign each button a unique ID (e.g. "LEFT", "RIGHT", etc.) that will be sent to the receiver (the desktop browser) when that button is pressed.

Sample Usage:

<div class="d-pad">
    <button class="nunchuck-button horizontal" id="LEFT"></button>
    <button class="nunchuck-button vertical" id="DOWN"></button>
    <button class="nunchuck-button vertical" id="UP"></button>
    <button class="nunchuck-button horizontal" id="RIGHT"></button>
</div>
<div class="left commands">
    <button class="nunchuck-button" id="START">START</button>
    <button class="nunchuck-button" id="SELECT">SELECT</button>
</div>
<div class="right commands">
	<button class="nunchuck-button" id="B">B</button>
	<button class="nunchuck-button" id="A">A</button>
</div>

nunchuck.onJoin(callback)

Fired when a phone connects to a channel corresponding to this particular web browser view.

The phone sends a JSON object with the following spec:

{
  username: "ksiegel",
  id: "1234",
  success: true,
  msg: ""
}
Data Description
username (string) inputted username of player
id (integer) generated ID of player
success (boolean) whether or not the controller successfully joined a room
msg (string) error message if success was false

Sample Usage:

n.receive(function(data){
	var user_id = data.id;
})

nunchuck.receive(callback)

Fired on a phone acceleration, button press, or button release event.

The phone sends a JSON object with the following spec:

{
  username: "ksiegel",
  id: "1234",
  buttons: ["A"],
  orientation: 
  {
    alpha : 0.0, // float - x axis orientation
    beta : 0.0, // float - y axis orientation
    gamma : 0.0, // float - z axis orientation
  },
  timestamp: "1407091145"
}
Data Description
username (string) inputted username of player
id (integer) generated ID of player
buttons (array) array of button IDs of buttons currently pressed by player
orientation.alpha (float) degree/radian value for direction the device is
orientation.beta (float) degree/radian value for device's front-back tilt
orientation.gamma (float) degree/radian value for device's left-right tilt
timestamp (long) seconds since epoch

Sample Usage:

var socket = io();
var n = nunchuck.init('host', socket);
n.onJoin(function(data){
	var username = data.username;
});

Run Locally

To start the demo site locally:

$ npm install
$ npm start

License

Available under the MIT License

Copyright (c) 2014 ehzhang, ankushg, anubhav94, kathrynsiegel

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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