求大神找错误

源自：3-3 线条的连接：lineJoin和miterLimit

<html>

<head>

<title>canvas02</title>

window.onload=function(){

var canvas=document.getElementById("canvas");

canvas.width=800;

canvas.height=800;

var context=canvas.getContext("2d");

context.lineWidth=10;

drawStar(contxet,150,300,400,400,15);

}

function drawStar(cxt,r,R,x,y,rot){

cxt.beginPath();

for(var i=0;i<5;i++){

cxt.lineTo(Math.cos((18+i*72-rot)/180*Math.PI)*R+x,

-Math.sin((18+i*72-rot)/180*Math.PI)*R+y);

cxt.lineTo(Math.cos((54+i*72-rot)/180*Math.PI)*r+x

,-Math.sin((54+i*72-rot)/180*Math.PI)*r+y);

}

cxt.closePath();

cxt.stroke();

}

</script>

</head>

<body>

</body>

</html>

提问者：qq_T_T若是人间四月天_0 2016-03-20 18:15