互动三角形圈堆叠动画效果-html代码-BFW代码库

互动三角形圈堆叠动画效果

代码语言：html

所属分类：动画

代码描述：互动三角形圈堆叠动画效果

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>
* {
  margin: 0;
  padding: 0;
  color: #FFF;
}

p.count {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 1.6rem;
}

canvas#canvas {
  display: block;
  background: #000;
}

ul#navigation {
  position: absolute;
  height: 100%;
  top: 0;
  right: 0;
  -webkit-writing-mode: vertical-rl;
  -ms-writing-mode: tb-rl;
  writing-mode: vertical-rl;
  text-align: center;
  margin-right: 1.6rem;
  font-size: 0.8rem;
}

ul#navigation>li {
  display: inline-block;
}
</style>

</head>
<body translate="no">
<canvas id="canvas">Canvas not supported.</canvas>
<ul id="navigation">
<li>Scroll up, down and click.</li>
</ul>
<p class="count"><input type="range" id="range" min="1" max="36" step="1" value="12"></p>

<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
      ********************/

    var range = document.getElementById('range');
    var ctx = canvas.getContext('2d');
    var X = canvas.width = window.innerWidth;
    var Y = canvas.height = window.innerHeight;
    var mouseX = null;
    var mouseY = null;
    var triangles = [];
    var triangleNum = range.value;
    var angle = 120;
    var radian = angle * Math.PI / 180;
    var ease = 0.5;
    var friction = 0.5;
    var flg = true;

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

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

    /********************
         Triangle
       ********************/

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

    Triangle.prototype.init = function (x, y, i) {
      this.x = x;
      this.y = y;
      this.x1;
      this.y1;
      this.r = 50;
      this.lw = 5;
      this.a = 30 * i;
      this.rad = this.a * Math.PI / 180;
      this.points = [];
      this.getPoints();
      this.closestIndex = 0;
      this.v = {
        x: 0,
        y: 0 };

      this.c = {
        r: rand(0, 255),
        g: rand(0, 255),
        b: rand(200, 255) };

    };

    Triangle.prototype.getPoints = function () {
      for (var i = 0; i < 3; i++) {
        var x = Math.cos(radian * i) * this.r + this.x;
        var y = Math.sin(radian * i) * this.r + this.y;
        var a = rand(0, 360);
        var rad = a * Math.PI / 180;
        var point = [x, y, rad];
        this.points.push(point);
      }
    };

    var dist = 50;
    Triangle.prototype.draw = function () {
      var ctx = this.ctx;
      ctx.save();
      ctx.lineWidth = this.lw;
      ctx.globalCompositeOperation = 'lighter';
      ctx.strokeStyle = 'rgb(' + this.c.r + ', ' + this.c.g + ', ' + this.c.b + ')';
      if (flg === true) {
        ctx.translate(this.x, this.y);
        ctx.scale(Math.cos(this.rad) * 2, Math.sin(this.rad) * 2);
     .........完整代码请登录后点击上方下载按钮下载查看