canvas七彩太阳光晕效果 JavaScript canvas实现七彩太阳光晕效果

时间:2021-05-20 bling flower 人气:0

想了解JavaScript canvas实现七彩太阳光晕效果的相关内容吗，bling flower在本文为您仔细讲解canvas七彩太阳光晕效果的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：canvas七彩太阳光晕,canvas七彩太阳,canvas太阳光晕，下面大家一起来学习吧。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        window.onload=function(){
            var canvas=document.getElementById('canvas');
            var cx=canvas.getContext("2d");
            cx.fillStyle='pink';
            cx.strokeStyle='pink';
            for(var i=0;i<10;i++){
                var g=cx.createLinearGradient(0,0,290,290);
                g.addColorStop(0,'rgba(255,0,0,1)');
                g.addColorStop(0.1,'rgba(255,0,0,0.5)');
                g.addColorStop(0.2,'rgba(255,165,0,0.4)');
                g.addColorStop(0.4,'rgba(205,255,0,0.5)');
                g.addColorStop(0.6,'rgba(230,145,0,0.5)');
                g.addColorStop(0.8,'rgba(0,127,255,0.5)');
                g.addColorStop(0.9,'rgba(100,200,205,0.9)');
                g.addColorStop(1,'rgba(0,255,255,0.5)');;
                cx.fillStyle=g;
                cx.beginPath();
                cx.arc(i*25,i*25,i*10,0,Math.PI*2,true);
                cx.closePath();
                cx.fill();
            }
        }
    </script>
</head>
<body>
    <canvas id="canvas" width="600px" height="600px" style="background-color: #ccc;"></canvas>
    
</body>
</html>

效果图如下：

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