<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
body {
margin: 0;
padding: 0;
text-align: center;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<script>
let canvasWidth = 600;
let canvasHeight = 600;
let centerX = canvasWidth / 2;
let centerY = canvasHeight / 2;
let r = canvasWidth / 2 - 4;
let canvas = document.getElementById('canvas');
canvas.width = canvasWidth;
canvas.height = canvasHeight;
let ctx = canvas.getContext('2d');
function setCanvasStrokeStyle() {
}
function drawClock() {
ctx.beginPath();
ctx.strokeStyle = "orange";
ctx.lineWidth = 4;
ctx.arc(centerX, centerY, r, 0, Math.PI * 2, true);
ctx.stroke()
}
function drawHours() {
let rad = 2 * Math.PI / 12
for (let i = 1; i <= 12; i++) {
ctx.save();
ctx.beginPath();
ctx.translate(centerX, centerY);
ctx.rotate(rad * i)
ctx.translate(-centerX, -centerY);
ctx.strokeStyle = "orange";
ctx.lineWidth = 4;
ctx.moveTo(centerX, centerY - r);
ctx.lineTo(centerX, centerY - r + 24);
ctx.font = "26px Arial";
ctx.textAlign = "center";
ctx.fillStyle = "orange";
ctx.fillText(i, centerX, centerY - r + 54);
ctx.stroke();
ctx.restore()
}
}
function drawMinutes() {
let rad = 2 * Math.PI / 60
for (let i = 1; i <= 60; i++) {
ctx.save();
ctx.beginPath();
ctx.translate(centerX, centerY);
ctx.rotate(rad * i)
ctx.translate(-centerX, -centerY);
ctx.strokeStyle = "orange";
ctx.lineWidth = 2;
ctx.moveTo(centerX, centerY - r);
ctx.lineTo(centerX, centerY - r + 16);
ctx.stroke();
ctx.restore()
}
}
// 画时针 分针 秒针
function drawTimeLine() {
ctx.beginPath();
ctx.arc(centerX, centerY, 20, 0, Math.PI * 2, true);
ctx.fillStyle = "orange";
ctx.fill();
// 时针
ctx.save()
ctx.beginPath();
ctx.lineWidth = 10;
ctx.translate(centerX, centerY);
ctx.rotate(Math.PI / 4)
ctx.translate(-centerX, -centerY);
ctx.moveTo(centerX, centerY);
ctx.lineTo(centerX, centerY - r + 148);
ctx.stroke();
ctx.restore()
// 分针
ctx.save()
ctx.beginPath();
ctx.translate(centerX, centerY);
ctx.rotate(Math.PI / 2)
ctx.translate(-centerX, -centerY);
ctx.lineWidth = 6;
ctx.moveTo(centerX, centerY);
ctx.lineTo(centerX, centerY - r + 108);
ctx.stroke();
ctx.restore()
// 秒针
ctx.beginPath();
ctx.lineWidth = 4;
ctx.moveTo(centerX, centerY);
ctx.lineTo(centerX, centerY - r + 68);
ctx.stroke();
}
drawClock();
drawHours();
drawMinutes();
drawTimeLine();
</script>
</body>
</html>