Giters

wagerfield / parallax

Parallax Engine that reacts to the orientation of a smart device

Home Page:http://wagerfield.github.io/parallax/

Geek Repo:Geek Repo

Github PK Tool:Github PK Tool

i am a newbie but ..i tried with the repo posted it didn't work when i was trying out the first time ..so i searched for the old repo it worked!

nischalmudennavar opened this issue · comments

commented

`/**

  • Parallax.js
  • @author Matthew Wagerfield - @wagerfield
  • @description Creates a parallax effect between an array of layers,
  •          driving the motion from the gyroscope output of a smartdevice.

  •          If no gyroscope is available, the cursor position is used.

*/
;(function(window, document, undefined) {

// Strict Mode
'use strict';

// Constants
var NAME = 'Parallax';
var MAGIC_NUMBER = 10;
var DEFAULTS = {
relativeInput: false,
clipRelativeInput: false,
calibrationThreshold: 100,
calibrationDelay: 500,
supportDelay: 500,
calibrateX: false,
calibrateY: true,
invertX: false,
invertY: true,
limitX: false,
limitY: false,
scalarX: 10.0,
scalarY: 10.0,
frictionX: 0.1,
frictionY: 0.1,
originX: 0.5,
originY: 0.5,
pointerEvents: true,
precision: 1
};

function Parallax(element, options) {

// DOM Context
this.element = element;
this.layers = element.getElementsByClassName('layer');

// Data Extraction
var data = {
  calibrateX: this.data(this.element, 'calibrate-x'),
  calibrateY: this.data(this.element, 'calibrate-y'),
  invertX: this.data(this.element, 'invert-x'),
  invertY: this.data(this.element, 'invert-y'),
  limitX: this.data(this.element, 'limit-x'),
  limitY: this.data(this.element, 'limit-y'),
  scalarX: this.data(this.element, 'scalar-x'),
  scalarY: this.data(this.element, 'scalar-y'),
  frictionX: this.data(this.element, 'friction-x'),
  frictionY: this.data(this.element, 'friction-y'),
  originX: this.data(this.element, 'origin-x'),
  originY: this.data(this.element, 'origin-y'),
  pointerEvents: this.data(this.element, 'pointer-events'),
  precision: this.data(this.element, 'precision')
};

// Delete Null Data Values
for (var key in data) {
  if (data[key] === null) delete data[key];
}

// Compose Settings Object
this.extend(this, DEFAULTS, options, data);

// States
this.calibrationTimer = null;
this.calibrationFlag = true;
this.enabled = false;
this.depthsX = [];
this.depthsY = [];
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();

}

Parallax.prototype.extend = function() {
if (arguments.length > 1) {
var master = arguments[0];
for (var i = 1, l = arguments.length; i < l; i++) {
var object = arguments[i];
for (var key in object) {
master[key] = object[key];
}
}
}
};

Parallax.prototype.data = function(element, name) {
return this.deserialize(element.getAttribute('data-'+name));
};

Parallax.prototype.deserialize = function(value) {
if (value === 'true') {
return true;
} else if (value === 'false') {
return false;
} else if (value === 'null') {
return null;
} else if (!isNaN(parseFloat(value)) && isFinite(value)) {
return parseFloat(value);
} else {
return value;
}
};

Parallax.prototype.camelCase = function(value) {
return value.replace(/-+(.)?/g, function(match, character){
return character ? character.toUpperCase() : '';
});
};

Parallax.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;
var isCreatedBody = false;
if (!document.body) {
isCreatedBody = true;
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);
if ( isCreatedBody ) {
body.removeAttribute('style');
body.parentNode.removeChild(body);
}
}
break;
}
return featureSupport;
};

Parallax.prototype.ww = null;
Parallax.prototype.wh = null;
Parallax.prototype.wcx = null;
Parallax.prototype.wcy = null;
Parallax.prototype.wrx = null;
Parallax.prototype.wry = null;
Parallax.prototype.portrait = null;
Parallax.prototype.desktop = !navigator.userAgent.match(/(iPhone|iPod|iPad|Android|BlackBerry|BB10|mobi|tablet|opera mini|nexus 7)/i);
Parallax.prototype.vendors = [null,['-webkit-','webkit'],['-moz-','Moz'],['-o-','O'],['-ms-','ms']];
Parallax.prototype.motionSupport = !!window.DeviceMotionEvent;
Parallax.prototype.orientationSupport = !!window.DeviceOrientationEvent;
Parallax.prototype.orientationStatus = 0;
Parallax.prototype.motionStatus = 0;
Parallax.prototype.propertyCache = {};

Parallax.prototype.initialise = function() {

if (Parallax.prototype.transform2DSupport === undefined) {
  Parallax.prototype.transform2DSupport = Parallax.prototype.transformSupport('2D');
  Parallax.prototype.transform3DSupport = Parallax.prototype.transformSupport('3D');
}

// Configure Context Styles
if (this.transform3DSupport) this.accelerate(this.element);
var style = window.getComputedStyle(this.element);
if (style.getPropertyValue('position') === 'static') {
  this.element.style.position = 'relative';
}

// Pointer events
if(!this.pointerEvents){
  this.element.style.pointerEvents = 'none';
}

// Setup
this.updateLayers();
this.updateDimensions();
this.enable();
this.queueCalibration(this.calibrationDelay);

};

Parallax.prototype.updateLayers = function() {

// Cache Layer Elements
this.layers = this.element.getElementsByClassName('layer');
this.depthsX = [];
this.depthsY = [];

// Configure Layer Styles
for (var i = 0, l = this.layers.length; i < l; i++) {
  var layer = this.layers[i];
  if (this.transform3DSupport) this.accelerate(layer);
  layer.style.position = i ? 'absolute' : 'relative';
  layer.style.display = 'block';
  layer.style.left = 0;
  layer.style.top = 0;

  // Cache Layer Depth
  //Graceful fallback on depth if depth-x or depth-y is absent
  var depth = this.data(layer, 'depth') || 0;
  this.depthsX.push(this.data(layer, 'depth-x') || depth);
  this.depthsY.push(this.data(layer, 'depth-y') || depth);
}

};

Parallax.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);
};

Parallax.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);
};

Parallax.prototype.queueCalibration = function(delay) {
clearTimeout(this.calibrationTimer);
this.calibrationTimer = setTimeout(this.onCalibrationTimer, delay);
};

Parallax.prototype.enable = function() {
if (!this.enabled) {
this.enabled = true;
if (!this.desktop && this.orientationSupport) {
this.portrait = null;
window.addEventListener('deviceorientation', this.onDeviceOrientation);
setTimeout(this.onOrientationTimer, this.supportDelay);
}
else if (!this.desktop && this.motionSupport) {
this.portrait = null;
window.addEventListener('devicemotion', this.onDeviceMotion);
setTimeout(this.onMotionTimer, 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);
}
};

Parallax.prototype.disable = function() {
if (this.enabled) {
this.enabled = false;
if (this.orientationSupport) {
window.removeEventListener('deviceorientation', this.onDeviceOrientation);
}
else if (this.motionSupport) {
window.removeEventListener('devicemotion', this.onDeviceMotion);
}
else {
window.removeEventListener('mousemove', this.onMouseMove);
}
window.removeEventListener('resize', this.onWindowResize);
cancelAnimationFrame(this.raf);
}
};

Parallax.prototype.calibrate = function(x, y) {
this.calibrateX = x === undefined ? this.calibrateX : x;
this.calibrateY = y === undefined ? this.calibrateY : y;
};

Parallax.prototype.invert = function(x, y) {
this.invertX = x === undefined ? this.invertX : x;
this.invertY = y === undefined ? this.invertY : y;
};

Parallax.prototype.friction = function(x, y) {
this.frictionX = x === undefined ? this.frictionX : x;
this.frictionY = y === undefined ? this.frictionY : y;
};

Parallax.prototype.scalar = function(x, y) {
this.scalarX = x === undefined ? this.scalarX : x;
this.scalarY = y === undefined ? this.scalarY : y;
};

Parallax.prototype.limit = function(x, y) {
this.limitX = x === undefined ? this.limitX : x;
this.limitY = y === undefined ? this.limitY : y;
};

Parallax.prototype.origin = function(x, y) {
this.originX = x === undefined ? this.originX : x;
this.originY = y === undefined ? this.originY : y;
};

Parallax.prototype.clamp = function(value, min, max) {
value = Math.max(value, min);
value = Math.min(value, max);
return value;
};

Parallax.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 = this.camelCase(this.vendors[i][1] + '-' + property);
} else {
jsProperty = property;
}
if (element.style[jsProperty] !== undefined) {
this.propertyCache[property] = jsProperty;
break;
}
}
}
element.style[jsProperty] = value;
};

Parallax.prototype.accelerate = function(element) {
this.css(element, 'transform', 'translate3d(0,0,0) rotate(0.0001deg)');
this.css(element, 'transform-style', 'preserve-3d');
this.css(element, 'backface-visibility', 'hidden');
};

Parallax.prototype.setPosition = function(element, x, y) {
x = x.toFixed(this.precision) + 'px';
y = y.toFixed(this.precision) + '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;
}
};

Parallax.prototype.onOrientationTimer = function() {
if (this.orientationSupport && this.orientationStatus === 0) {
this.disable();
this.orientationSupport = false;
this.enable();
}
};

Parallax.prototype.onMotionTimer = function() {
if (this.motionSupport && this.motionStatus === 0) {
this.disable();
this.motionSupport = false;
this.enable();
}
};

Parallax.prototype.onCalibrationTimer = function() {
this.calibrationFlag = true;
};

Parallax.prototype.onWindowResize = function() {
this.updateDimensions();
};

Parallax.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 layer = this.layers[i];
var depthX = this.depthsX[i];
var depthY = this.depthsY[i];
var xOffset = this.vx * (depthX * (this.invertX ? -1 : 1));
var yOffset = this.vy * (depthY * (this.invertY ? -1 : 1));
this.setPosition(layer, xOffset, yOffset);
}
this.raf = requestAnimationFrame(this.onAnimationFrame);
};

Parallax.prototype.rotate = function(beta,gamma){
// 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 = this.wh > this.ww;
  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;

}
Parallax.prototype.onDeviceOrientation = function(event) {
// Validate environment and event properties.
var beta = event.beta;
var gamma = event.gamma;
if (!this.desktop && beta !== null && gamma !== null) {
// Set orientation status.
this.orientationStatus = 1;
this.rotate(beta,gamma);
}
};

Parallax.prototype.onDeviceMotion = function(event) {
// Validate environment and event properties.
var beta = event.rotationRate.beta;
var gamma = event.rotationRate.gamma;
if (!this.desktop && beta !== null && gamma !== null) {
// Set motion status.
this.motionStatus = 1;
this.rotate(beta,gamma);
}
};

Parallax.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;
}

};

// Expose Parallax
window[NAME] = Parallax;

})(window, document);
`