以下是用HTML5画布绘制的弧形。我该如何使弧形外部更加平滑,减少像素化或增加抗锯齿效果?
下面是创建上述弧形所使用的代码:
![一个在HTML5画布中绘制的弧形](https://istack.dev59.com/tFBFt.webp)
var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');
var img = new Image();
var x = canvas.width / 2;
var y = canvas.height / 2;
var radius = 100;
var startAngle = Math.PI;
var endAngle = 2 * Math.PI;
var counterClockwise = false;
var outX = x
var outY = y
var vari1 = .1;
var endAngle = startAngle + vari1 * Math.PI;
context.beginPath();
context.arc(outX, outY, radius, startAngle, endAngle, counterClockwise);
context.lineWidth = 25;
context.strokeStyle = '#FA603D';
context.stroke();
context.closePath();
<canvas id="myCanvas"></canvas>