vs粒子爱心跳动源代码
时间: 2023-11-21 13:57:28 浏览: 123
以下是使用VS Code编辑器实现粒子爱心跳动的源代码:
```html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Particle Heart</title>
<style>
body {
margin: 0;
padding: 0;
background-color: #000;
}
canvas {
display: block;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<script>
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
var W = window.innerWidth;
var H = window.innerHeight;
canvas.width = W;
canvas.height = H;
var particles = [];
var mouse = {};
var particle_count = 100;
for (var i = 0; i < particle_count; i++) {
particles.push(new particle());
}
canvas.addEventListener('mousemove', track_mouse, false);
function track_mouse(e) {
mouse.x = e.pageX;
mouse.y = e.pageY;
}
function particle() {
this.speed = { x: -2.5 + Math.random() * 5, y: -15 + Math.random() * 10 };
if (mouse.x && mouse.y) {
this.location = { x: mouse.x, y: mouse.y };
}
else {
this.location = { x: W / 2, y: H / 2 };
}
this.radius = 10 + Math.random() * 20;
this.life = 20 + Math.random() * 10;
this.remaining_life = this.life;
this.r = Math.round(Math.random() * 255);
this.g = Math.round(Math.random() * 255);
this.b = Math.round(Math.random() * 255);
}
function draw() {
ctx.globalCompositeOperation = "source-over";
ctx.fillStyle = "black";
ctx.fillRect(0, 0, W, H);
ctx.globalCompositeOperation = "lighter";
for (var i = 0; i < particles.length; i++) {
var p = particles[i];
ctx.beginPath();
p.opacity = Math.round(p.remaining_life / p.life * 100) / 100
var gradient = ctx.createRadialGradient(p.location.x, p.location.y, 0, p.location.x, p.location.y, p.radius);
gradient.addColorStop(0, "rgba(" + p.r + ", " + p.g + ", " + p.b + ", " + p.opacity + ")");
gradient.addColorStop(0.5, "rgba(" + p.r + ", " + p.g + ", " + p.b + ", " + p.opacity + ")");
gradient.addColorStop(1, "rgba(" + p.r + ", " + p.g + ", " + p.b + ", 0)");
ctx.fillStyle = gradient;
ctx.arc(p.location.x, p.location.y, p.radius, Math.PI * 2, false);
ctx.fill();
p.remaining_life--;
p.radius--;
p.location.x += p.speed.x;
p.location.y += p.speed.y;
if (p.remaining_life < 0 || p.radius < 0) {
particles[i] = new particle();
}
}
}
setInterval(draw, 33);
</script>
</body>
</html>
```
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