<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Canvas图形密集动画特效</title>
<style>
body {
margin: 0;
padding: 0;
overflow: hidden;
background: #000;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
font-family: Arial, sans-serif;
}
canvas {
display: block;
position: fixed;
top: 0;
left: 0;
z-index: 1;
}
.controls {
position: fixed;
bottom: 20px;
left: 20px;
z-index: 2;
display: flex;
gap: 10px;
}
button {
padding: 8px 15px;
background: rgba(255,255,255,0.1);
color: white;
border: 1px solid rgba(255,255,255,0.3);
border-radius: 4px;
cursor: pointer;
transition: all 0.3s ease;
}
button:hover {
background: rgba(255,255,255,0.2);
}
/* 插入的链接样式 */
.custom-link {
position: fixed;
bottom: 20px;
right: 20px;
color: rgba(255,255,255,0.7);
text-decoration: none;
font-size: 14px;
background: rgba(0,0,0,0.3);
padding: 8px 15px;
border-radius: 20px;
z-index: 10;
transition: all 0.3s ease;
}
.custom-link:hover {
color: white;
background: rgba(0,0,0,0.5);
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<div class="controls">
<button id="addShapes">增加图形</button>
<button id="changePattern">变换模式</button>
</div>
<script>
document.addEventListener('DOMContentLoaded', function() {
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
const addBtn = document.getElementById('addShapes');
const changeBtn = document.getElementById('changePattern');
// 设置canvas尺寸为窗口大小
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
// 图形数组
let shapes = [];
let patternType = 1;
const colors = [
'#FF5252', '#FF4081', '#E040FB',
'#7C4DFF', '#536DFE', '#448AFF',
'#40C4FF', '#18FFFF', '#64FFDA',
'#69F0AE', '#B2FF59', '#EEFF41',
'#FFFF00', '#FFD740', '#FFAB40'
];
// 图形类
class Shape {
constructor(type) {
this.type = type;
this.x = Math.random() * canvas.width;
this.y = Math.random() * canvas.height;
this.size = Math.random() * 30 + 10;
this.color = colors[Math.floor(Math.random() * colors.length)];
this.speedX = Math.random() * 2 - 1;
this.speedY = Math.random() * 2 - 1;
this.rotation = Math.random() * Math.PI * 2;
this.rotationSpeed = Math.random() * 0.02 - 0.01;
this.points = this.generatePoints();
}
generatePoints() {
const points = [];
const sides = this.type === 1 ? Math.floor(Math.random() * 3) + 3 :
this.type === 2 ? Math.floor(Math.random() * 4) + 4 :
Math.floor(Math.random() * 5) + 5;
for (let i = 0; i < sides; i++) {
const angle = i * (Math.PI * 2 / sides);
const distance = this.size * (0.8 + Math.random() * 0.4);
points.push({
x: Math.cos(angle) * distance,
y: Math.sin(angle) * distance
});
}
return points;
}
update() {
this.x += this.speedX;
this.y += this.speedY;
this.rotation += this.rotationSpeed;
// 边界检测
if (this.x < -this.size * 2) this.x = canvas.width + this.size;
if (this.x > canvas.width + this.size) this.x = -this.size * 2;
if (this.y < -this.size * 2) this.y = canvas.height + this.size;
if (this.y > canvas.height + this.size) this.y = -this.size * 2;
}
draw() {
ctx.save();
ctx.translate(this.x, this.y);
ctx.rotate(this.rotation);
ctx.fillStyle = this.color;
ctx.beginPath();
ctx.moveTo(this.points[0].x, this.points[0].y);
for (let i = 1; i < this.points.length; i++) {
ctx.lineTo(this.points[i].x, this.points[i].y);
}
ctx.closePath();
ctx.fill();
ctx.restore();
}
}
// 初始化图形
function initShapes(count = 50) {
for (let i = 0; i < count; i++) {
shapes.push(new Shape(patternType));
}
}
// 动画循环
function animate() {
requestAnimationFrame(animate);
// 半透明填充制造拖尾效果
ctx.fillStyle = 'rgba(0, 0, 0, 0.05)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
// 更新和绘制所有图形
shapes.forEach(shape => {
shape.update();
shape.draw();
});
}
// 初始化并开始动画
initShapes();
animate();
// 点击按钮增加图形
addBtn.addEventListener('click', function() {
initShapes(20);
});
// 点击按钮变换模式
changeBtn.addEventListener('click', function() {
patternType = patternType < 3 ? patternType + 1 : 1;
shapes = [];
initShapes();
});
// 窗口大小改变时调整canvas尺寸
window.addEventListener('resize', function() {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
});
});
</script>
</body>
</html>
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