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我有这个脚本和标记。浏览器无法渲染圆形
<canvas id="myCanvas" style="width:100px; height:100px; background-color:aqua" >
</canvas>
<script>
var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');
var centerX = canvas.width/2;
var centerY = canvas.height/2;
var radius = 10;
context.beginPath();
context.arc(centerX, centerY, radius, 0, 2 * Math.PI, false);
context.fillStyle = 'green';
context.fill();
context.lineWidth = 5;
context.strokeStyle = '#003300';
context.stroke();
</script>
问题是,浏览器描绘了一个日食而不是圆圈。为什么?
Thanks @apsillers。所以你的意思是画布有不同的坐标系,可以由这些坐标系设置? – Jami