您好,登錄后才能下訂單哦!
效果圖
html結(jié)構(gòu)
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>canvas15</title>
<link rel="stylesheet" href="">
</head>
<body>
<canvas id="canvas" style ="border:1px solid #aaa;diplay:block;margin:50px auto;">
當(dāng)前瀏覽器不支持canvas,請(qǐng)更換瀏覽器后再試
</canvas>
</body>
</html>
js腳本
<script>
window.onload = function(){
var canvas = document.getElementById("canvas");
canvas.width = 800;
canvas.height = 800;
var context = canvas.getContext("2d");
drawStar(context,80,200,400,400,50,10,"#058");
}
function drawStar(context,r,R,x,y,rot,lineWidth,strokeStyle){
context.beginPath();
for(var i = 0;i<5;i++){
context.lineTo(Math.cos((18+i*72 - rot)/180 * Math.PI) * R + x,-Math.sin((18+i*72 - rot)/180*Math.PI)*R + y);
context.lineTo(Math.cos((54+i*72 - rot)/180 * Math.PI) * r + x,-Math.sin((54+i*72 - rot)/180*Math.PI)*r + y);
}
context.closePath();
context.lineWidth = lineWidth;
context.strokeStyle = strokeStyle;
context.stroke();
}
</script>
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng),如果涉及侵權(quán)請(qǐng)聯(lián)系站長(zhǎng)郵箱:is@yisu.com進(jìn)行舉報(bào),并提供相關(guān)證據(jù),一經(jīng)查實(shí),將立刻刪除涉嫌侵權(quán)內(nèi)容。