// PARALLAX.JS : Copyright (C) 2014 Matthew Wagerfield - @wagerfield
;(function($, window, document, undefined) {
// Strict Mode
'use strict';
// Constants
var NAME = 'parallax';
var MAGIC_NUMBER = 30;
var DEFAULTS = {
relativeInput: false,
clipRelativeInput: false,
calibrationThreshold: 100,
calibrationDelay: 500,
supportDelay: 500,
calibrateX: false,
calibrateY: true,
invertX: true,
invertY: true,
limitX: false,
limitY: false,
scalarX: 10.0,
scalarY: 10.0,
frictionX: 0.1,
frictionY: 0.1,
originX: 0.5,
originY: 0.5
};
function Plugin(element, options) {
// DOM Context
this.element = element;
// Selections
this.$context = $(element).data('api', this);
this.$layers = this.$context.find('.layer');
// Data Extraction
var data = {
calibrateX: this.$context.data('calibrate-x') || null,
calibrateY: this.$context.data('calibrate-y') || null,
invertX: this.$context.data('invert-x') || null,
invertY: this.$context.data('invert-y') || null,
limitX: parseFloat(this.$context.data('limit-x')) || null,
limitY: parseFloat(this.$context.data('limit-y')) || null,
scalarX: parseFloat(this.$context.data('scalar-x')) || null,
scalarY: parseFloat(this.$context.data('scalar-y')) || null,
frictionX: parseFloat(this.$context.data('friction-x')) || null,
frictionY: parseFloat(this.$context.data('friction-y')) || null,
originX: parseFloat(this.$context.data('origin-x')) || null,
originY: parseFloat(this.$context.data('origin-y')) || null
};
// Delete Null Data Values
for (var key in data) {
if (data[key] === null) delete data[key];
}
// Compose Settings Object
$.extend(this, DEFAULTS, options, data);
// States
this.calibrationTimer = null;
this.calibrationFlag = true;
this.enabled = false;
this.depths = [];
this.raf = null;
// Element Bounds
this.bounds = null;
this.ex = 0;
this.ey = 0;
this.ew = 0;
this.eh = 0;
// Element Center
this.ecx = 0;
this.ecy = 0;
// Element Range
this.erx = 0;
this.ery = 0;
// Calibration
this.cx = 0;
this.cy = 0;
// Input
this.ix = 0;
this.iy = 0;
// Motion
this.mx = 0;
this.my = 0;
// Velocity
this.vx = 0;
this.vy = 0;
// Callbacks
this.onMouseMove = this.onMouseMove.bind(this);
this.onDeviceOrientation = this.onDeviceOrientation.bind(this);
this.onOrientationTimer = this.onOrientationTimer.bind(this);
this.onCalibrationTimer = this.onCalibrationTimer.bind(this);
this.onAnimationFrame = this.onAnimationFrame.bind(this);
this.onWindowResize = this.onWindowResize.bind(this);
// Initialise
this.initialise();
}
Plugin.prototype.transformSupport = function(value) {
var element = document.createElement('div');
var propertySupport = false;
var propertyValue = null;
var featureSupport = false;
var cssProperty = null;
var jsProperty = null;
for (var i = 0, l = this.vendors.length; i < l; i++) {
if (this.vendors[i] !== null) {
cssProperty = this.vendors[i][0] + 'transform';
jsProperty = this.vendors[i][1] + 'Transform';
} else {
cssProperty = 'transform';
jsProperty = 'transform';
}
if (element.style[jsProperty] !== undefined) {
propertySupport = true;
break;
}
}
switch(value) {
case '2D':
featureSupport = propertySupport;
break;
case '3D':
if (propertySupport) {
var body = document.body || document.createElement('body');
var documentElement = document.documentElement;
var documentOverflow = documentElement.style.overflow;
if (!document.body) {
documentElement.style.overflow = 'hidden';
documentElement.appendChild(body);
body.style.overflow = 'hidden';
body.style.background = '';
}
body.appendChild(element);
element.style[jsProperty] = 'translate3d(1px,1px,1px)';
propertyValue = window.getComputedStyle(element).getPropertyValue(cssProperty);
featureSupport = propertyValue !== undefined && propertyValue.length > 0 && propertyValue !== "none";
documentElement.style.overflow = documentOverflow;
body.removeChild(element);
}
break;
}
return featureSupport;
};
Plugin.prototype.ww = null;
Plugin.prototype.wh = null;
Plugin.prototype.wcx = null;
Plugin.prototype.wcy = null;
Plugin.prototype.wrx = null;
Plugin.prototype.wry = null;
Plugin.prototype.portrait = null;
Plugin.prototype.desktop = !navigator.userAgent.match(/(iPhone|iPod|iPad|Android|BlackBerry|BB10|mobi|tablet|opera mini|nexus 7)/i);
Plugin.prototype.vendors = [null,['-webkit-','webkit'],['-moz-','Moz'],['-o-','O'],['-ms-','ms']];
Plugin.prototype.motionSupport = !!window.DeviceMotionEvent;
Plugin.prototype.orientationSupport = !!window.DeviceOrientationEvent;
Plugin.prototype.orientationStatus = 0;
Plugin.prototype.transform2DSupport = Plugin.prototype.transformSupport('2D');
Plugin.prototype.transform3DSupport = Plugin.prototype.transformSupport('3D');
Plugin.prototype.propertyCache = {};
Plugin.prototype.initialise = function() {
// Configure Styles
if (this.$context.css('position') === 'static') {
this.$context.css({
position:'relative'
});
}
// Hardware Accelerate Context
this.accelerate(this.$context);
// Setup
this.updateLayers();
this.updateDimensions();
this.enable();
this.queueCalibration(this.calibrationDelay);
};
Plugin.prototype.updateLayers = function() {
// Cache Layer Elements
this.$layers = this.$context.find('.layer');
this.depths = [];
// Configure Layer Styles
this.$layers.css({
position:'absolute',
display:'block',
left: 0,
top: 0
});
this.$layers.first().css({
position:'relative'
});
// Hardware Accelerate Layers
this.accelerate(this.$layers);
// Cache Depths
this.$layers.each($.proxy(function(index, element) {
this.depths.push($(element).data('depth') || 0);
}, this));
};
Plugin.prototype.updateDimensions = function() {
this.ww = window.innerWidth;
this.wh = window.innerHeight;
this.wcx = this.ww * this.originX;
this.wcy = this.wh * this.originY;
this.wrx = Math.max(this.wcx, this.ww - this.wcx);
this.wry = Math.max(this.wcy, this.wh - this.wcy);
};
Plugin.prototype.updateBounds = function() {
this.bounds = this.element.getBoundingClientRect();
this.ex = this.bounds.left;
this.ey = this.bounds.top;
this.ew = this.bounds.width;
this.eh = this.bounds.height;
this.ecx = this.ew * this.originX;
this.ecy = this.eh * this.originY;
this.erx = Math.max(this.ecx, this.ew - this.ecx);
this.ery = Math.max(this.ecy, this.eh - this.ecy);
};
Plugin.prototype.queueCalibration = function(delay) {
clearTimeout(this.calibrationTimer);
this.calibrationTimer = setTimeout(this.onCalibrationTimer, delay);
};
Plugin.prototype.enable = function() {
if (!this.enabled) {
this.enabled = true;
if (this.orientationSupport) {
this.portrait = null;
window.addEventListener('deviceorientation', this.onDeviceOrientation);
setTimeout(this.onOrientationTimer, this.supportDelay);
} else {
this.cx = 0;
this.cy = 0;
this.portrait = false;
window.addEventListener('mousemove', this.onMouseMove);
}
window.addEventListener('resize', this.onWindowResize);
this.raf = requestAnimationFrame(this.onAnimationFrame);
}
};
Plugin.prototype.disable = function() {
if (this.enabled) {
this.enabled = false;
if (this.orientationSupport) {
window.removeEventListener('deviceorientation', this.onDeviceOrientation);
} else {
window.removeEventListener('mousemove', this.onMouseMove);
}
window.removeEventListener('resize', this.onWindowResize);
cancelAnimationFrame(this.raf);
}
};
Plugin.prototype.calibrate = function(x, y) {
this.calibrateX = x === undefined ? this.calibrateX : x;
this.calibrateY = y === undefined ? this.calibrateY : y;
};
Plugin.prototype.invert = function(x, y) {
this.invertX = x === undefined ? this.invertX : x;
this.invertY = y === undefined ? this.invertY : y;
};
Plugin.prototype.friction = function(x, y) {
this.frictionX = x === undefined ? this.frictionX : x;
this.frictionY = y === undefined ? this.frictionY : y;
};
Plugin.prototype.scalar = function(x, y) {
this.scalarX = x === undefined ? this.scalarX : x;
this.scalarY = y === undefined ? this.scalarY : y;
};
Plugin.prototype.limit = function(x, y) {
this.limitX = x === undefined ? this.limitX : x;
this.limitY = y === undefined ? this.limitY : y;
};
Plugin.prototype.origin = function(x, y) {
this.originX = x === undefined ? this.originX : x;
this.originY = y === undefined ? this.originY : y;
};
Plugin.prototype.clamp = function(value, min, max) {
value = Math.max(value, min);
value = Math.min(value, max);
return value;
};
Plugin.prototype.css = function(element, property, value) {
var jsProperty = this.propertyCache[property];
if (!jsProperty) {
for (var i = 0, l = this.vendors.length; i < l; i++) {
if (this.vendors[i] !== null) {
jsProperty = $.camelCase(this.vendors[i][1] + '-' + property);
} else {
jsProperty = property;
}
if (element.style[jsProperty] !== undefined) {
this.propertyCache[property] = jsProperty;
break;
}
}
}
element.style[jsProperty] = value;
};
Plugin.prototype.accelerate = function($element) {
for (var i = 0, l = $element.length; i < l; i++) {
var element = $element[i];
this.css(element, 'transform', 'translate3d(0,0,0)');
this.css(element, 'transform-style', 'preserve-3d');
this.css(element, 'backface-visibility', 'hidden');
}
};
Plugin.prototype.setPosition = function(element, x, y) {
x += 'px';
y += 'px';
if (this.transform3DSupport) {
this.css(element, 'transform', 'translate3d('+x+','+y+',0)');
} else if (this.transform2DSupport) {
this.css(element, 'transform', 'translate('+x+','+y+')');
} else {
element.style.left = x;
element.style.top = y;
}
};
Plugin.prototype.onOrientationTimer = function(event) {
if (this.orientationSupport && this.orientationStatus === 0) {
this.disable();
this.orientationSupport = false;
this.enable();
}
};
Plugin.prototype.onCalibrationTimer = function(event) {
this.calibrationFlag = true;
};
Plugin.prototype.onWindowResize = function(event) {
this.updateDimensions();
};
Plugin.prototype.onAnimationFrame = function() {
this.updateBounds();
var dx = this.ix - this.cx;
var dy = this.iy - this.cy;
if ((Math.abs(dx) > this.calibrationThreshold) || (Math.abs(dy) > this.calibrationThreshold)) {
this.queueCalibration(0);
}
if (this.portrait) {
this.mx = this.calibrateX ? dy : this.iy;
this.my = this.calibrateY ? dx : this.ix;
} else {
this.mx = this.calibrateX ? dx : this.ix;
this.my = this.calibrateY ? dy : this.iy;
}
this.mx *= this.ew * (this.scalarX / 100);
this.my *= this.eh * (this.scalarY / 100);
if (!isNaN(parseFloat(this.limitX))) {
this.mx = this.clamp(this.mx, -this.limitX, this.limitX);
}
if (!isNaN(parseFloat(this.limitY))) {
this.my = this.clamp(this.my, -this.limitY, this.limitY);
}
this.vx += (this.mx - this.vx) * this.frictionX;
this.vy += (this.my - this.vy) * this.frictionY;
for (var i = 0, l = this.$layers.length; i < l; i++) {
var depth = this.depths[i];
var layer = this.$layers[i];
var xOffset = this.vx * depth * (this.invertX ? -1 : 1);
var yOffset = this.vy * depth * (this.invertY ? -1 : 1);
this.setPosition(layer, xOffset, yOffset);
}
this.raf = requestAnimationFrame(this.onAnimationFrame);
};
Plugin.prototype.onDeviceOrientation = function(event) {
// Validate environment and event properties.
if (!this.desktop && event.beta !== null && event.gamma !== null) {
// Set orientation status.
this.orientationStatus = 1;
// Extract Rotation
var x = (event.beta || 0) / MAGIC_NUMBER; // -90 :: 90
var y = (event.gamma || 0) / MAGIC_NUMBER; // -180 :: 180
// Detect Orientation Change
var portrait = window.innerHeight > window.innerWidth;
if (this.portrait !== portrait) {
this.portrait = portrait;
this.calibrationFlag = true;
}
// Set Calibration
if (this.calibrationFlag) {
this.calibrationFlag = false;
this.cx = x;
this.cy = y;
}
// Set Input
this.ix = x;
this.iy = y;
}
};
Plugin.prototype.onMouseMove = function(event) {
// Cache mouse coordinates.
var clientX = event.clientX;
var clientY = event.clientY;
// Calculate Mouse Input
if (!this.orientationSupport && this.relativeInput) {
// Clip mouse coordinates inside element bounds.
if (this.clipRelativeInput) {
clientX = Math.max(clientX, this.ex);
clientX = Math.min(clientX, this.ex + this.ew);
clientY = Math.max(clientY, this.ey);
clientY = Math.min(clientY, this.ey + this.eh);
}
// Calculate input relative to the element.
this.ix = (clientX - this.ex - this.ecx) / this.erx;
this.iy = (clientY - this.ey - this.ecy) / this.ery;
} else {
// Calculate input relative to the window.
this.ix = (clientX - this.wcx) / this.wrx;
this.iy = (clientY - this.wcy) / this.wry;
}
};
var API = {
enable: Plugin.prototype.enable,
disable: Plugin.prototype.disable,
updateLayers: Plugin.prototype.updateLayers,
calibrate: Plugin.prototype.calibrate,
friction: Plugin.prototype.friction,
invert: Plugin.prototype.invert,
scalar: Plugin.prototype.scalar,
limit: Plugin.prototype.limit,
origin: Plugin.prototype.origin
};
$.fn[NAME] = function (value) {
var args = arguments;
return this.each(function () {
var $this = $(this);
var plugin = $this.data(NAME);
if (!plugin) {
plugin = new Plugin(this, value);
$this.data(NAME, plugin);
}
if (API[value]) {
plugin[value].apply(plugin, Array.prototype.slice.call(args, 1));
}
});
};
})(window.jQuery || window.Zepto, window, document);
/**
* Request Animation Frame Polyfill.
* @author Tino Zijdel
* @author Paul Irish
* @see https://gist.github.com/paulirish/1579671
*/
;(function() {
var lastTime = 0;
var vendors = ['ms', 'moz', 'webkit', 'o'];
for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame'];
}
if (!window.requestAnimationFrame) {
window.requestAnimationFrame = function(callback, element) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var id = window.setTimeout(function() { callback(currTime + timeToCall); },
timeToCall);
lastTime = currTime + timeToCall;
return id;
};
}
if (!window.cancelAnimationFrame) {
window.cancelAnimationFrame = function(id) {
clearTimeout(id);
};
}
}());
//------------------------------------------------
$('#scene').parallax();
!
