html代码烟花特效python,烟花的编程代码html

要在网页上实现烟花特效，可以使用HTML、CSS和JavaScript来创建。以下是一个简单的烟花特效的实现，你可以将这些代码嵌入到你的HTML文件中，通过浏览器查看效果。




<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>烟花特效</title>
<style>
  canvas {
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
  }
</style>
</head>
<body>
<canvas></canvas>
 
<script>
  const canvas = document.querySelector('canvas');
  const ctx = canvas.getContext('2d');
  const width = canvas.width = window.innerWidth;
  const height = canvas.height = window.innerHeight;
  const particles = [];
 
  function random(min, max) {
    return Math.random() * (max - min) + min;
  }
 
  function Particle() {
    this.x = random(0, width);
    this.y = random(0, height);
    this.coordLast = [this.x, this.y];
    this.angle = random(0, 2 * Math.PI);
    this.speed = random(0.1, 1);
    this.radius = random(1, 5);
    this.alpha = 0.5;
    this.decay = random(0.015, 0.03);
  }
 
  Particle.prototype.update = function(timeDelta) {
    this.coordLast[0] = this.x;
    this.coordLast[1] = this.y;
    this.angle += random(-0.1, 0.1);
    this.x += Math.cos(this.angle) * this.speed * timeDelta;
    this.y += Math.sin(this.angle) * this.speed * timeDelta;
    this.alpha -= this.decay;
  };
 
  Particle.prototype.draw = function() {
    ctx.save();
    ctx.globalAlpha = this.alpha;
    ctx.beginPath();
    ctx.arc(this.x, this.y, this.radius, 0, 2 * Math.PI);
    ctx.closePath();
    ctx.fill();
    ctx.restore();
  };
 
  function loop() {
    ctx.fillStyle = 'rgba(0, 0, 0, 0.1)';
    ctx.fillRect(0, 0, width, height);
 
    particles.push(new Particle());
 
    let i = particles.length;
    while (i--) {
      particles[i].update(0.016);
      particles[i].draw();
      if (particles[i].alpha <= 0) {
        particles.splice(i, 1);
      }
    }
    requestAnimationFrame(loop);
  }
 
  loop();
</script>
</body>
</html>

这段代码会在网页上创建一个烟花特效，使用了canvas元素来绘制烟花的粒子，并使用JavaScript来更新和渲染每个粒子的状态。你可以将这段代码保存为.html文件，然后用浏览器打开查看烟花特效。

html代码烟花特效python,烟花的编程代码html

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