我尝试在画布上绘制多个圆圈,在绘制第一个圆圈后,会出现一条水平线。这是一个打印屏幕: https://imgur.com/a/IwP6l。
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
var distance_x_circle = 20;
var distance_y_circle = 20;
for (var i = 0; i < 8; i++) {
context.arc(distance_x_circle, 20, 15, 0, 2 * Math.PI);
context.stroke();
distance_x_circle += 40;
}
答案 0 :(得分:0)
您的所有圈子都被视为一条路径,这就是您获得该路线的原因。您可以使用CanvasRenderingContext2D.beginPath()
为每个圈子开始一条新路径。
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
var distance_x_circle = 20;
var distance_y_circle = 20;
for (var i = 0; i < 8; i++) {
context.beginPath();
context.arc(distance_x_circle, 20, 15, 0, 2 * Math.PI);
context.stroke();
distance_x_circle += 40;
}
<canvas id="canvas" width=500 height=100></canvas>