星际穿越粒子特效-html代码-BFW代码库

星际穿越粒子特效

代码语言：html

所属分类：粒子

代码描述：星际穿越粒子特效，按住左键出现粒子放大

代码标签：特效

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">

<style>
/********************
  Common
********************/

html, body {
  height: 100%;
  width: 100%;
  font-family: Helvetica, verdana, monospace;
  color: #FFF;
  font-size: 100%;
  padding: 0;
  margin: 0;
  letter-spacing: 0.2rem;
  overflow: hidden;
  background: #000;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
}

a {
  color: #FFF;
  text-decoration: none;
}

h1 {
  font-size: 1.6rem;
}

p {
  padding: 0.8rem 0;
  font-size: 0.8rem;
}

header#header {
  position: absolute;
  top: 0;
  left: 0;
  padding: 1.6rem;
}

/********************
  Contents
********************/

canvas#canvas {
  background: #000;
}
</style>

</head>
<body translate="no">

<header id="header">
<h1>goToTheMoon</h1>
<p>Created date / April 19, 2020</p>
</header>

<main id="main">
<canvas id="canvas">This browser cannot use a canvas.</canvas>
</main>

<script>
(function () {
  'use strict';
  window.addEventListener('load', function () {
    var canvas = document.getElementById('canvas');

    if (!canvas || !canvas.getContext) {
      return false;
    }

    /********************
        Random Number
      ********************/

    function rand(min, max) {
      return Math.floor(Math.random() * (max - min + 1) + min);
    }

    /********************
        Var
      ********************/

    // canvas 
    var ctx = canvas.getContext('2d');
    var X = canvas.width = window.innerWidth;
    var Y = canvas.height = window.innerHeight;
    var mouseX = X / 2;
    var mouseY = Y / 2;

    /********************
                          Animation
                        ********************/

    window.requestAnimationFrame =
    window.requestAnimationFrame ||
    window.mozRequestAnimationFrame ||
    window.webkitRequestAnimationFrame ||
    window.msRequestAnimationFrame ||
    function (cb) {
      setTimeout(cb, 17);
    };

    /********************
         Moon
       ********************/

    var moonNum = 1;
    var moons = [];
    var radius = X / 2;

    if (X < 768) {
      radius = X / 2;
    }

    function Moon(ctx, x, y) {
      this.ctx = ctx;
      this.init(x, y);
    }

    Moon.prototype.init = function (x, y) {
      this.x = x;
      this.y = y;
      this.c = '255, 255, 255';
      this.r = radius;
    };

    Moon.prototype.resize = function () {
      this.x = X / 2;
      this.y = Y / 2;
      this.r = radius;
    };

    Moon.prototype.render = function () {
      this.draw();
    };

    Moon.prototype.draw = function () {
      ctx.save();
      ctx.beginPath();
      ctx.globalAlpha = 0.8;
      var col = this.c;
      var g = ctx.createRadialGradient(this.x, this.y, this.r, X / 2 - this.r, Y / 2, 0);
      g.addColorStop(0, "rgba(" + col + ", " + 1 * 1 + ")");
      g.addColorStop(0.5, "rgba(" + col + ", " + 1 * 0.2 + ")");
      g.addColorStop(1, "rgba(" + col + ", " + 1 * 0 + ")");
      ctx.fillStyle = g;
      ctx.arc(this.x, this.y, this.r, Math.PI * 2, false);
      ctx.fill();
      ctx.restore();
    };

    for (var i = 0; i < moonNum; i++) {
      var moon = new Moon(ctx, 0, 0);
      moons.push(moon);
    }

    /********************
        Particle
      ********************/

    var particleNum = 2000;
    var particles = [];
    var maxParticles = 1;

    var colors = ['rgb(54, 38, 112)', 'rgb(98, 98, 159)', 'rgb(0, 137, 190)', 'rgb(0, 108, 154)'];

    if (X < 768) {
      particleNum = 1000;
    }

    function Particle(ctx, x, y, r) {
      this.ctx = ctx;
      this.init(x, y, r);
    }

    Particle.prototype.init = function (x, y, r) {
      this.x = x;
      this.y = y;
      this.r = r;
      this.s = 0.1;
      this.ga = rand(0, 1) + 0.1;
      this.v = {
        x: 0,
        y: 0 };

      /*
                this.c = {
                  r: rand(0, 255),
      .........完整代码请登录后点击上方下载按钮下载查看