Canvas实现放射线动画效果       本文主要分享了Canvas实现放射线动画的示例代码。具有很好的参考价值，下面跟着小编一起来看下吧

效果如下：

代码如下：

 !DOCTYPE html 
 html 
 head 
 meta charset="UTF-8" 
 title /title 
 style 
 body {background: #000;overflow: hidden;margin: 0;padding: 0;}
 #canv {width: 45%;margin: 5% 30%;animation: wheel-rotate 30s linear infinite;}
 @keyframes wheel-rotate {
 from {
 transform: rotate(0deg);
 to {
 transform: rotate(360deg);
 /style 
 /head 
 body 
 canvas id="canv" width="600" height="600" /canvas 
 script type="text/javascript" 
 var c;
 var $;
 var w = 600;
 var h = 600;
 constant = 15;
 var rad = 300;
 var timeout = 0;
 c = document.getElementById("canv");
 $ = c.getContext("2d");
 drawLines();
 function drawLines() {
 $.fillRect(0,0,w,h);
 $.translate(w/2,h/2);
 for (var i = 0; i i++) {
 for (var n = -45; n = 45; n+=constant) {
 setTimeout("draw("+n+");",100 * timeout);
 timeout++;
 function draw(n){
 $.beginPath();
 $.moveTo(0,rad);
 var radians = Math.PI/180*n;
 var x = (rad * Math.sin(radians)) / Math.sin(Math.PI/2 - radians);
 $.lineTo(x,0);
 if (Math.abs(n) == 45) {
 $.stroke "rgb(200,200,200)";
 $.lineWidth=.5;
 } else {
 $.stroke ;
 $.lineWidth=.5;
 $.stroke();
 $.rotate((Math.PI/180)*15);
 function rndColor() {
 var r = 255*Math.random()|0,
 g = 255*Math.random()|0,
 b = 255*Math.random()|0;
 return 'rgb(' + r + ',' + g + ',' + b + ')';
 function myrefresh(){
 //window.location.reload();
 //drawLines()
 //setTimeout('myrefresh()',100*175);
 /script 
 /body 
 /html 

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