使用JavaScript + HTML5 Canvas实现互动爱心雨完整代码
作者：jackzhuoa
canvas是HTML5中推出的新功能,可以在页面上生成一个画布,使用js可以在画布上绘制一些图形,这篇文章主要介绍了使用JavaScript + HTML5 Canvas实现互动爱心雨的相关资料,需要的朋友可以参考下
实例代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>情人节快乐！</title>
<style>
body {
margin: 0;
overflow: hidden;
}
canvas {
display: block;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<script>
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
// 爱心类
class Heart {
constructor() {
this.x = Math.random() * canvas.width;
this.y = Math.random() * -canvas.height;
this.size = Math.random() * 10 + 10;
this.speed = Math.random() * 2 + 1;
}
draw() {
ctx.beginPath();
const t = Date.now() / 1000;
const x = 16 * Math.pow(Math.sin(t), 3);
const y = 13 * Math.cos(t) - 5 * Math.cos(2 * t) - 2 * Math.cos(3 * t) - Math.cos(4 * t);
const scaledX = this.x + x * this.size;
const scaledY = this.y - y * this.size;
ctx.moveTo(scaledX, scaledY);
ctx.bezierCurveTo(scaledX + this.size, scaledY - this.size, scaledX + 2 * this.size, scaledY + this.size, scaledX, scaledY + 2 * this.size);
ctx.bezierCurveTo(scaledX - 2 * this.size, scaledY + this.size, scaledX - this.size, scaledY - this.size, scaledX, scaledY);
ctx.fillStyle = 'red';
ctx.fill();
}
move() {
this.y += this.speed;
if (this.y > canvas.height) {
this.y = -this.size;
this.x = Math.random() * canvas.width;
}
}
}
// 创建爱心数组
const hearts = [];
for (let i = 0; i < 100; i++) {
hearts.push(new Heart());
}
// 动画循环
function animate() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
hearts.forEach(heart => {
heart.draw();
heart.move();
});
requestAnimationFrame(animate);
}
animate();
// 鼠标互动
canvas.addEventListener('mousemove', (e) => {
const mouseX = e.clientX;
const mouseY = e.clientY;
hearts.forEach(heart => {
const dx = mouseX - heart.x;
const dy = mouseY - heart.y;
const distance = Math.sqrt(dx * dx + dy * dy);
if (distance < 100) {
const angle = Math.atan2(dy, dx);
heart.x -= Math.cos(angle) * 2;
heart.y -= Math.sin(angle) * 2;
}
});
});
</script>
</body>
</html>效果图
总结
到此这篇关于使用JavaScript + HTML5 Canvas实现互动爱心雨的文章就介绍到这了,更多相关JS+HTML5 Canvas实现互动爱心雨内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！