情人节表白爱心动画-html代码-BFW代码库

情人节表白爱心动画

代码语言：html

所属分类：表白

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>
html, body {
  height: 100%;
  width: 100%;
  background: #ee9ca7;
  padding: 0;
  margin: 0;
  overflow: hidden;
}

canvas#canvas {
  background: #ee9ca7;  /* fallback for old browsers */
  background: -webkit-linear-gradient(to bottom, #ffdde1, #ee9ca7);  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to bottom, #ffdde1, #ee9ca7); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
</style>

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

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

<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;

    // heart
    var heartNum = 1;
    var hearts = [];
    var miniHeartNum = 100;
    var miniHearts = [];

    var rad = Math.PI / 180;
    var GRAVITY = 0.01;

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

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

    /********************
         MiniHeart
       ********************/

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

    MiniHeart.prototype.init = function (x, y, r) {
      this.ctx = ctx;
      this.r = r;
      this.x1 = x;
      this.y1 = y;
      this.a = rand(0, 360);
      this.num = 22.5;
      this.v = {
        x: rand(-3, 3),
        y: rand(-3, 3) };

      this.x2 = this.x1 + this.r * Math.cos(this.a * rad);
      this.y2 = this.y1 + this.r * Math.sin(this.a * rad);
      this.cx1 = this.x1 + this.r * Math.cos((this.a + this.num) * rad);
      this.cy1 = this.y1 + this.r * Math.sin((this.a + this.num) * rad);
      this.cx2 = this.x1 + this.r * Math.cos((this.a - this.num) * rad);
      this.cy2 = this.y1 + this.r * Math.sin((this.a - this.num) * rad);
      this.chord = 2 * this.r * Math.sin(this.num * rad / 2);
    };

    MiniHeart.prototype.draw = function () {
      ctx = this.ctx;
      ctx.restore();
      ctx.fillStyle = '#fb7daf';
      ctx.beginPath();
      ctx.moveTo(this.x2, this.y2);
      ctx.arc(this.cx1, this.cy1, this.chord, (270 + this.a) * rad, (270 + this.a + 225) * rad);
      ctx.lineTo(this.x1, this.y1);
      ctx.moveTo(this.x2, this.y2);
      ctx.arc(this.cx2, this.cy2, this.chord, (90 + this.a) * rad, (90 + this.a + 135) * rad, true);
      ctx.lineTo(this.x1, this.y1);
      ctx.fill();
    };

    MiniHeart.prototype.wrapPosition = function () {
      if (this.y1 > Y) {
        this.init(X / 2, Y / 2, rand(5, 30));
      }
    };

    MiniHeart.prototype.updatePosition = function () {
      this.v.y += GRAVITY;
      this.x1 += this.v.x;
      this.x2 += this.v.x;
      this.cx1 += this.v.x;
      this.cx2 += thi.........完整代码请登录后点击上方下载按钮下载查看