Schnee Script

von Zuckerpuppe Mo 12 Dez 2011 - 12:41

Hallo

da hier jedes Jahr um die Weihnachtszeit nach Scripten gefragt wird, die Schneefall erzeugen, hab ich für euch ein Script, das ihr über die Scriptverwaltung im Adminbereich einsetzen könnt.
Da dieses Script ohne Grafiken auskommt, hat es auch nicht so lange Ladezeiten.

HINWEIS! Jedoch gilt immer:
Solche Scripte können den Aufbau eurer Seite stark verlangsamen, sofern die Rechnerleistung des betrachtenden Users nicht ausreichend ist!

Hier nun das Script, welches ihr im Adminbereich einsetzen könnt:

Module - HTML und Javascript - Javascript Codes Verwaltung

dort auf "ein neues Javascript erstellen" klicken und den folgenden Code einfügen.

Code:: /** @license * DHTML Snowstorm! JavaScript-based Snow for web pages * -------------------------------------------------------- * Version 1.41.20101113 (Previous rev: 1.4.20091115) * Copyright (c) 2007, Scott Schiller. All rights reserved. * Code provided under the BSD License: * http://schillmania.com/projects/snowstorm/license.txt */ /*global window, document, navigator, clearInterval, setInterval */ /*jslint white: false, onevar: true, plusplus: false, undef: true, nomen: true, eqeqeq: true, bitwise: true, regexp: true, newcap: true, immed: true */ var snowStorm = (function(window, document) { // --- common properties --- this.flakesMax = 128; // Limit total amount of snow made (falling + sticking) this.flakesMaxActive = 64; // Limit amount of snow falling at once (less = lower CPU use) this.animationInterval = 33; // Theoretical "miliseconds per frame" measurement. 20 = fast + smooth, but high CPU use. 50 = more conservative, but slower this.excludeMobile = true; // Snow is likely to be bad news for mobile phones' CPUs (and batteries.) By default, be nice. this.flakeBottom = null; // Integer for Y axis snow limit, 0 or null for "full-screen" snow effect this.snowColor = '#fff'; // Don't eat (or use?) yellow snow. this.snowCharacter = '*'; // • = bullet, · is square on some systems etc. this.snowStick = true; // Whether or not snow should "stick" at the bottom. When off, will never collect. this.targetElement = null; // element which snow will be appended to (null = document.body) - can be an element ID eg. 'myDiv', or a DOM node reference this.useMeltEffect = true; // When recycling fallen snow (or rarely, when falling), have it "melt" and fade out if browser supports it this.useTwinkleEffect = false; // Allow snow to randomly "flicker" in and out of view while falling this.usePositionFixed = false; // true = snow does not shift vertically when scrolling. May increase CPU load, disabled by default - if enabled, used only where supported // --- less-used bits --- this.freezeOnBlur = true; // Only snow when the window is in focus (foreground.) Saves CPU. this.flakeLeftOffset = 0; // Left margin/gutter space on edge of container (eg. browser window.) Bump up these values if seeing horizontal scrollbars. this.flakeRightOffset = 0; // Right margin/gutter space on edge of container this.flakeWidth = 8; // Max pixel width reserved for snow element this.flakeHeight = 8; // Max pixel height reserved for snow element this.vMaxX = 5; // Maximum X velocity range for snow this.vMaxY = 4; // Maximum Y velocity range for snow this.zIndex = 0; // CSS stacking order applied to each snowflake // --- End of user section --- var s = this, storm = this, i, // UA sniffing and backCompat rendering mode checks for fixed position, etc. isIE = navigator.userAgent.match(/msie/i), isIE6 = navigator.userAgent.match(/msie 6/i), isWin98 = navigator.appVersion.match(/windows 98/i), isMobile = navigator.userAgent.match(/mobile/i), isBackCompatIE = (isIE && document.compatMode === 'BackCompat'), noFixed = (isMobile || isBackCompatIE || isIE6), screenX = null, screenX2 = null, screenY = null, scrollY = null, vRndX = null, vRndY = null, windOffset = 1, windMultiplier = 2, flakeTypes = 6, fixedForEverything = false, opacitySupported = (function(){ try { document.createElement('div').style.opacity = '0.5'; } catch(e) { return false; } return true; }()), didInit = false, docFrag = document.createDocumentFragment(); this.timers = []; this.flakes = []; this.disabled = false; this.active = false; this.meltFrameCount = 20; this.meltFrames = []; this.events = (function() { var old = (window.attachEvent), slice = Array.prototype.slice, evt = { add: (old?'attachEvent':'addEventListener'), remove: (old?'detachEvent':'removeEventListener') }; function getArgs(oArgs) { var args = slice.call(oArgs), len = args.length; if (old) { args[1] = 'on' + args[1]; // prefix if (len > 3) { args.pop(); // no capture } } else if (len === 3) { args.push(false); } return args; } function apply(args, sType) { var oFunc = args.shift()[evt[sType]]; if (old) { oFunc(args[0], args[1]); } else { oFunc.apply(this, args); } } function addEvent() { apply(getArgs(arguments), 'add'); } function removeEvent() { apply(getArgs(arguments), 'remove'); } return { add: addEvent, remove: removeEvent }; }()); function rnd(n,min) { if (isNaN(min)) { min = 0; } return (Math.random()*n)+min; } function plusMinus(n) { return (parseInt(rnd(2),10)===1?n*-1:n); } this.randomizeWind = function() { vRndX = plusMinus(rnd(s.vMaxX,0.2)); vRndY = rnd(s.vMaxY,0.2); if (this.flakes) { for (var i=0; i<this.flakes.length; i++) { if (this.flakes[i].active) { this.flakes[i].setVelocities(); } } } }; this.scrollHandler = function() { // "attach" snowflakes to bottom of window if no absolute bottom value was given scrollY = (s.flakeBottom?0:parseInt(window.scrollY||document.documentElement.scrollTop||document.body.scrollTop,10)); if (isNaN(scrollY)) { scrollY = 0; // Netscape 6 scroll fix } if (!fixedForEverything && !s.flakeBottom && s.flakes) { for (var i=s.flakes.length; i--;) { if (s.flakes[i].active === 0) { s.flakes[i].stick(); } } } }; this.resizeHandler = function() { if (window.innerWidth || window.innerHeight) { screenX = window.innerWidth-(!isIE?16:2)-s.flakeRightOffset; screenY = (s.flakeBottom?s.flakeBottom:window.innerHeight); } else { screenX = (document.documentElement.clientWidth||document.body.clientWidth||document.body.scrollWidth)-(!isIE?8:0)-s.flakeRightOffset; screenY = s.flakeBottom?s.flakeBottom:(document.documentElement.clientHeight||document.body.clientHeight||document.body.scrollHeight); } screenX2 = parseInt(screenX/2,10); }; this.resizeHandlerAlt = function() { screenX = s.targetElement.offsetLeft+s.targetElement.offsetWidth-s.flakeRightOffset; screenY = s.flakeBottom?s.flakeBottom:s.targetElement.offsetTop+s.targetElement.offsetHeight; screenX2 = parseInt(screenX/2,10); }; this.freeze = function() { // pause animation if (!s.disabled) { s.disabled = 1; } else { return false; } for (var i=s.timers.length; i--;) { clearInterval(s.timers[i]); } }; this.resume = function() { if (s.disabled) { s.disabled = 0; } else { return false; } s.timerInit(); }; this.toggleSnow = function() { if (!s.flakes.length) { // first run s.start(); } else { s.active = !s.active; if (s.active) { s.show(); s.resume(); } else { s.stop(); s.freeze(); } } }; this.stop = function() { this.freeze(); for (var i=this.flakes.length; i--;) { this.flakes[i].o.style.display = 'none'; } s.events.remove(window,'scroll',s.scrollHandler); s.events.remove(window,'resize',s.resizeHandler); if (s.freezeOnBlur) { if (isIE) { s.events.remove(document,'focusout',s.freeze); s.events.remove(document,'focusin',s.resume); } else { s.events.remove(window,'blur',s.freeze); s.events.remove(window,'focus',s.resume); } } }; this.show = function() { for (var i=this.flakes.length; i--;) { this.flakes[i].o.style.display = 'block'; } }; this.SnowFlake = function(parent,type,x,y) { var s = this, storm = parent; this.type = type; this.x = x||parseInt(rnd(screenX-20),10); this.y = (!isNaN(y)?y:-rnd(screenY)-12); this.vX = null; this.vY = null; this.vAmpTypes = [1,1.2,1.4,1.6,1.8]; // "amplification" for vX/vY (based on flake size/type) this.vAmp = this.vAmpTypes[this.type]; this.melting = false; this.meltFrameCount = storm.meltFrameCount; this.meltFrames = storm.meltFrames; this.meltFrame = 0; this.twinkleFrame = 0; this.active = 1; this.fontSize = (10+(this.type/5)*10); this.o = document.createElement('div'); this.o.innerHTML = storm.snowCharacter; this.o.style.color = storm.snowColor; this.o.style.position = (fixedForEverything?'fixed':'absolute'); this.o.style.width = storm.flakeWidth+'px'; this.o.style.height = storm.flakeHeight+'px'; this.o.style.fontFamily = 'arial,verdana'; this.o.style.overflow = 'hidden'; this.o.style.fontWeight = 'normal'; this.o.style.zIndex = storm.zIndex; docFrag.appendChild(this.o); this.refresh = function() { if (isNaN(s.x) || isNaN(s.y)) { // safety check return false; } s.o.style.left = s.x+'px'; s.o.style.top = s.y+'px'; }; this.stick = function() { if (noFixed || (storm.targetElement !== document.documentElement && storm.targetElement !== document.body)) { s.o.style.top = (screenY+scrollY-storm.flakeHeight)+'px'; } else if (storm.flakeBottom) { s.o.style.top = storm.flakeBottom+'px'; } else { s.o.style.display = 'none'; s.o.style.top = 'auto'; s.o.style.bottom = '0px'; s.o.style.position = 'fixed'; s.o.style.display = 'block'; } }; this.vCheck = function() { if (s.vX>=0 && s.vX<0.2) { s.vX = 0.2; } else if (s.vX<0 && s.vX>-0.2) { s.vX = -0.2; } if (s.vY>=0 && s.vY<0.2) { s.vY = 0.2; } }; this.move = function() { var vX = s.vX*windOffset, yDiff; s.x += vX; s.y += (s.vY*s.vAmp); if (s.x >= screenX || screenX-s.x < storm.flakeWidth) { // X-axis scroll check s.x = 0; } else if (vX < 0 && s.x-storm.flakeLeftOffset < 0-storm.flakeWidth) { s.x = screenX-storm.flakeWidth-1; // flakeWidth; } s.refresh(); yDiff = screenY+scrollY-s.y; if (yDiff<storm.flakeHeight) { s.active = 0; if (storm.snowStick) { s.stick(); } else { s.recycle(); } } else { if (storm.useMeltEffect && s.active && s.type < 3 && !s.melting && Math.random()>0.998) { // ~1/1000 chance of melting mid-air, with each frame s.melting = true; s.melt(); // only incrementally melt one frame // s.melting = false; } if (storm.useTwinkleEffect) { if (!s.twinkleFrame) { if (Math.random()>0.9) { s.twinkleFrame = parseInt(Math.random()*20,10); } } else { s.twinkleFrame--; s.o.style.visibility = (s.twinkleFrame && s.twinkleFrame%2===0?'hidden':'visible'); } } } }; this.animate = function() { // main animation loop // move, check status, die etc. s.move(); }; this.setVelocities = function() { s.vX = vRndX+rnd(storm.vMaxX*0.12,0.1); s.vY = vRndY+rnd(storm.vMaxY*0.12,0.1); }; this.setOpacity = function(o,opacity) { if (!opacitySupported) { return false; } o.style.opacity = opacity; }; this.melt = function() { if (!storm.useMeltEffect || !s.melting) { s.recycle(); } else { if (s.meltFrame < s.meltFrameCount) { s.meltFrame++; s.setOpacity(s.o,s.meltFrames[s.meltFrame]); s.o.style.fontSize = s.fontSize-(s.fontSize*(s.meltFrame/s.meltFrameCount))+'px'; s.o.style.lineHeight = storm.flakeHeight+2+(storm.flakeHeight*0.75*(s.meltFrame/s.meltFrameCount))+'px'; } else { s.recycle(); } } }; this.recycle = function() { s.o.style.display = 'none'; s.o.style.position = (fixedForEverything?'fixed':'absolute'); s.o.style.bottom = 'auto'; s.setVelocities(); s.vCheck(); s.meltFrame = 0; s.melting = false; s.setOpacity(s.o,1); s.o.style.padding = '0px'; s.o.style.margin = '0px'; s.o.style.fontSize = s.fontSize+'px'; s.o.style.lineHeight = (storm.flakeHeight+2)+'px'; s.o.style.textAlign = 'center'; s.o.style.verticalAlign = 'baseline'; s.x = parseInt(rnd(screenX-storm.flakeWidth-20),10); s.y = parseInt(rnd(screenY)*-1,10)-storm.flakeHeight; s.refresh(); s.o.style.display = 'block'; s.active = 1; }; this.recycle(); // set up x/y coords etc. this.refresh(); }; this.snow = function() { var active = 0, used = 0, waiting = 0, flake = null, i; for (i=s.flakes.length; i--;) { if (s.flakes[i].active === 1) { s.flakes[i].move(); active++; } else if (s.flakes[i].active === 0) { used++; } else { waiting++; } if (s.flakes[i].melting) { s.flakes[i].melt(); } } if (active<s.flakesMaxActive) { flake = s.flakes[parseInt(rnd(s.flakes.length),10)]; if (flake.active === 0) { flake.melting = true; } } }; this.mouseMove = function(e) { if (!s.followMouse) { return true; } var x = parseInt(e.clientX,10); if (x<screenX2) { windOffset = -windMultiplier+(x/screenX2*windMultiplier); } else { x -= screenX2; windOffset = (x/screenX2)*windMultiplier; } }; this.createSnow = function(limit,allowInactive) { for (var i=0; i<limit; i++) { s.flakes[s.flakes.length] = new s.SnowFlake(s,parseInt(rnd(flakeTypes),10)); if (allowInactive || i>s.flakesMaxActive) { s.flakes[s.flakes.length-1].active = -1; } } storm.targetElement.appendChild(docFrag); }; this.timerInit = function() { s.timers = (!isWin98?[setInterval(s.snow,s.animationInterval)]:[setInterval(s.snow,s.animationInterval*3),setInterval(s.snow,s.animationInterval)]); }; this.init = function() { for (var i=0; i<s.meltFrameCount; i++) { s.meltFrames.push(1-(i/s.meltFrameCount)); } s.randomizeWind(); s.createSnow(s.flakesMax); // create initial batch s.events.add(window,'resize',s.resizeHandler); s.events.add(window,'scroll',s.scrollHandler); if (s.freezeOnBlur) { if (isIE) { s.events.add(document,'focusout',s.freeze); s.events.add(document,'focusin',s.resume); } else { s.events.add(window,'blur',s.freeze); s.events.add(window,'focus',s.resume); } } s.resizeHandler(); s.scrollHandler(); if (s.followMouse) { s.events.add(isIE?document:window,'mousemove',s.mouseMove); } s.animationInterval = Math.max(20,s.animationInterval); s.timerInit(); }; this.start = function(bFromOnLoad) { if (!didInit) { didInit = true; } else if (bFromOnLoad) { // already loaded and running return true; } if (typeof s.targetElement === 'string') { var targetID = s.targetElement; s.targetElement = document.getElementById(targetID); if (!s.targetElement) { throw new Error('Snowstorm: Unable to get targetElement "'+targetID+'"'); } } if (!s.targetElement) { s.targetElement = (!isIE?(document.documentElement?document.documentElement:document.body):document.body); } if (s.targetElement !== document.documentElement && s.targetElement !== document.body) { s.resizeHandler = s.resizeHandlerAlt; // re-map handler to get element instead of screen dimensions } s.resizeHandler(); // get bounding box elements s.usePositionFixed = (s.usePositionFixed && !noFixed); // whether or not position:fixed is supported fixedForEverything = s.usePositionFixed; if (screenX && screenY && !s.disabled) { s.init(); s.active = true; } }; function doStart() { if ((this.excludeMobile && !isMobile) || !this.excludeMobile) { window.setTimeout(function() { s.start(true); }, 20); } // event cleanup s.events.remove(window, 'load', doStart); } // hooks for starting the snow s.events.add(window, 'load', doStart, false); return this; }(window, document));

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