81 lines
2.6 KiB
JavaScript
81 lines
2.6 KiB
JavaScript
(function(window,document,undefined){
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var hearts = [];
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window.requestAnimationFrame = (function(){
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return window.requestAnimationFrame ||
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window.webkitRequestAnimationFrame ||
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window.mozRequestAnimationFrame ||
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window.oRequestAnimationFrame ||
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window.msRequestAnimationFrame ||
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function (callback){
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setTimeout(callback,1000/60);
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}
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})();
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init();
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function init(){
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css(".heart{width: 10px;height: 10px;position: fixed;background: #f00;transform: rotate(45deg);-webkit-transform: rotate(45deg);-moz-transform: rotate(45deg);}.heart:after,.heart:before{content: '';width: inherit;height: inherit;background: inherit;border-radius: 50%;-webkit-border-radius: 50%;-moz-border-radius: 50%;position: absolute;}.heart:after{top: -5px;}.heart:before{left: -5px;}");
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attachEvent();
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gameloop();
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}
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function gameloop(){
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for(var i=0;i<hearts.length;i++){
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if(hearts[i].alpha <=0){
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document.body.removeChild(hearts[i].el);
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hearts.splice(i,1);
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continue;
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}
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hearts[i].y--;
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hearts[i].scale += 0.004;
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hearts[i].alpha -= 0.013;
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hearts[i].el.style.cssText = "left:"+hearts[i].x+"px;top:"+hearts[i].y+"px;opacity:"+hearts[i].alpha+";transform:scale("+hearts[i].scale+","+hearts[i].scale+") rotate(45deg);background:"+hearts[i].color;
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}
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requestAnimationFrame(gameloop);
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}
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function attachEvent(){
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var old = typeof window.onclick==="function" && window.onclick;
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window.onclick = function(event){
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old && old();
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createHeart(event);
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}
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}
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function createHeart(event){
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var d = document.createElement("div");
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d.className = "heart";
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hearts.push({
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el : d,
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x : event.clientX - 5,
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y : event.clientY - 5,
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scale : 1,
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alpha : 1,
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color : randomColor()
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});
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document.body.appendChild(d);
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}
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function css(css){
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var style = document.createElement("style");
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style.type="text/css";
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try{
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style.appendChild(document.createTextNode(css));
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}
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catch(ex){
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style.styleSheet.cssText = css;
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}
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document.getElementsByTagName('head')[0].appendChild(style);
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}
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function randomColor(){
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return "rgb("+(~~(Math.random()*255))+","+(~~(Math.random()*255))+","+(~~(Math.random()*255))+")";
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}
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})(window,document);
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