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Direktori : /proc/self/root/home2/selectio/www/tnpsctestbatch.com/js/ |
Current File : //proc/self/root/home2/selectio/www/tnpsctestbatch.com/js/anm.js |
// Anm © 2014-2015 Andrey Polischuk // github.com/andrepolischuk/anm !function() { 'use strict'; /** * Object classes */ var elementClass = document.body.getAttribute('data-anm'); /** * Base options undefined */ if (!elementClass) { return; } /** * IE lt 9 detection */ var msie = /MSIE.\d+\./gi.test(navigator.userAgent) && +navigator.userAgent.replace(/.*MSIE.(\d+)\..*/gi, "$1") < 9; /** * Event name */ var eventName = 'ontouchstart' in window || 'onmsgesturechange' in window ? 'touchmove' : 'mousemove'; /** * Pause flag */ var pause; /** * Effects */ var effects = [ 'x', 'y', 'scale', 'opacity', 'rotate' ]; /** * Transform map */ var transformMap = { 'webkitTransform' : 'translate3d', 'MozTransform' : 'translate3d', 'msTransform' : 'translate3d', 'OTransform' : 'translate', 'transform' : 'translate3d' }; /** * Anm * @api public */ function anm() { } /** * Elements * @api public */ var elements = anm.elements = document.querySelectorAll(elementClass); /** * On animation * @api public */ anm.on = function() { pause = false; }; /** * Off animation * @api public */ anm.off = function() { pause = true; }; /** * Toggle animation * @api public */ anm.toggle = function() { pause = !pause; }; /** * Calculate cursor position * @param {Object} e * @return {Object} * @api private */ function calculatePosition(e) { var pos = {}; pos.x = e.clientX - window.innerWidth / 2 || 0; pos.y = e.clientY - window.innerHeight / 2 || 0; pos.fi = (Math.atan(pos.x === 0 ? Infinity : -pos.y / pos.x) + (pos.x < 0 ? Math.PI : (-pos.y < 0 ? 2 * Math.PI : 0))); pos.s = 45 * Math.sin(2 * pos.fi) / 100; pos.x /= 100; pos.y /= 100; pos.r = Math.sqrt(Math.pow(pos.x, 2) + Math.pow(pos.y, 2)) / Math.sqrt(Math.pow(window.innerWidth, 2) + Math.pow(window.innerHeight, 2)) * 2; return pos; } /** * Calculate element factors * @param {Object} el * @return {Object} * @api private */ function calculateFactors(el) { var fact = {}; for (var i = 0; i < effects.length; i++) { fact[effects[i]] = +el.getAttribute('data-speed-' + effects[i]) || 0; } return fact; } /** * Calculate element transforms * @param {Object} pos * @param {Object} fact * @return {Object} * @api private */ function calculateTransforms(pos, fact) { var transform = {}; transform.x = pos.x * fact.x + 'px'; transform.y = pos.y * fact.y + 'px'; transform.scale = 1 + (pos.r * fact.scale); transform.opacity = 1 - (pos.r * Math.abs(fact.opacity)); transform.rotate = -pos.s * pos.r * 100 * fact.rotate + 'deg'; return transform; } /** * Set element transform styles * @param {Object} el * @param {Object} transform * @return {Object} * @api private */ function setElementStyle(el, transform) { if (msie) { el.style.marginLeft = transform.x; el.style.marginTop = transform.y; } else { for (var m in transformMap) { if (transformMap.hasOwnProperty(m)) { el.style[m] = [ transformMap[m], '(', transform.x + ',' + transform.y, transformMap[m] === 'translate' ? '' : ',0', ') scale(', transform.scale, ') rotate(', transform.rotate, ')' ].join(''); } } el.style.opacity = transform.opacity; el.style.MozOpacity = transform.opacity; } } /** * Set elements positions * @api private */ function position(e) { if (pause) { return; } e = e.type === 'touchmove' ? e.changedTouches[0] : e; var fact, transform, pos = calculatePosition(e); for (var i = 0, el; i < elements.length; i++) { el = elements[i]; fact = calculateFactors(el); transform = calculateTransforms(pos, fact); setElementStyle(el, transform); } } /** * Set start position */ position({}); /** * Set move event handler */ if (window.addEventListener) { window.addEventListener(eventName, position, false); } else { window.attachEvent('onmousemove', function() { position.call(window, window.event); }); } /** * Module exports */ if (typeof define === 'function' && define.amd) { define([], function() { return anm; }); } else if (typeof module !== 'undefined' && module.exports) { module.exports = anm; } else { this.anm = anm; } }.call(this);