## Canvas绘制曲线 ### 圆弧绘制 ~~~ ctx.arc(100,100,50,0,Math.PI / 2, true); ctx.stroke(); ~~~ ### 二次样条曲线绘制 ~~~ ctx.moveTo(91,332); ctx.quadraticCurveTo(287,142,401,357); ctx.stroke(); ~~~ ### 贝塞尔曲线绘制 ~~~ ctx.moveTo(175,375); ctx.quadraticCurveTo(297,182,468,252,517,380); ctx.stroke(); ~~~