JS画5角星方法介绍_javascript技巧

function create5StarClip(context)
{
var n = 0;
var dx = 100;
var dy = 0;
var s = 150;
context.beginPath();
context.translate(100,150);
var x = Math.sin(0);
var y = Math.cos(0);
var dig = Math.PI / 5 * 4;
for(var i = 0; i {
var x = Math.sin(i * dig);
var y = Math.cos(i * dig);
context.lineTo( dx + x * s,dy + y * s);
}
context.clip();
}