使用Python和matplotlib库
导入绘图库
```python
import matplotlib.pyplot as plt
```
创建画布
```python
fig, ax = plt.subplots()
```
绘制圆环
```python
circle = plt.Circle((0, 0), 5, fill=False)
ax.add_artist(circle)
```
设置坐标轴范围和标签
```python
ax.set_xlim([10, 10])
ax.set_ylim([10, 10])
ax.set_xlabel('X')
ax.set_ylabel('Y')
```
显示图表
```python
plt.show()
```
使用Go语言
```go
package main
import (
"math"
"time"
)
func main() {
p := NewPainter()
p.up()
p.size(4)
for i := 0; i < 361; i++ {
p.c(1)
p.move(100*math.Cos(3.1415626*float64(i)/180), 100*math.Sin(3.1415926*float64(i)/180))
p.down()
p.line(100*math.Cos(3.1415626*float64(i)/180), 100*math.Sin(3.1415926*float64(i)/180))
}
p.up()
for j := 0; j < 20; j++ {
p.c(2)
p.move(100*math.Cos(3.1415626*float64(i)/180)+20*math.Cos(3.1415926*float64(j)/180), 20*math.Sin(3.1415926*float64(j)/180)+100*math.Sin(3.1415926*float64(i)/180))
p.down()
p.line(100*math.Cos(3.1415626*float64(i)/180)+20*math.Cos(3.1415926*float64(j)/180), 20*math.Sin(3.1415926*float64(j)/180)+100*math.Sin(3.1415926*float64(i)/180))
y++
}
}
```
使用JavaScript和HTML5 Canvas
设置画布
```html
```
获取绘图上下文
```javascript
var canvas = document.getElementById('myCanvas');
var ctx = canvas.getContext('2d');
```
绘制圆环
```javascript
var centerX = canvas.width / 2;
var centerY = canvas.height / 2;
var rad = Math.PI * 2 / 100;
var speed = 10;
canvas.onclick = function() {
window.open('flightHour.html');
};
function blueCircle(n) {
ctx.save();
ctx.strokeStyle = "A757A8";
ctx.lineCap = "round";
ctx.lineWidth = 30;
ctx.beginPath();
ctx.arc(centerX, centerY, 30, 0, 2 * Math.PI, false);
ctx.stroke();
ctx.closePath();
ctx.restore();
}
```
使用turtle库