div+css+js实现鼠标跟随光线产生影子交互动画效果代码-html代码-BFW代码库

div+css+js实现鼠标跟随光线产生影子交互动画效果代码

代码语言：html

所属分类：动画

代码描述：div+css+js实现鼠标跟随光线产生影子交互动画效果代码

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{
  height: 100%;
}
body{
		margin: 0;
		padding: 0;
		height: 100%;
		overflow: hidden;
		cursor: none;
}
#canvas{
		background-color: #2c343f;
		width: 100%;
		height: 100%;		
}
</style>
</head>
<body>
<!-- partial:index.partial.html -->
<canvas id="canvas"></canvas>
<!-- partial -->
  <script >
      
      var c = document.getElementById("canvas");
var ctx = c.getContext("2d");

function resize() {
    var box = c.getBoundingClientRect();
    c.width = box.width;
    c.height = box.height;
}

var light = {
    x: 160,
    y: 200
}

var colors = ["#f5c156", "#e6616b", "#5cd3ad"];

function drawLight() {
    ctx.beginPath();
    ctx.arc(light.x, light.y, 1000, 0, 2 * Math.PI);
    var gradient = ctx.createRadialGradient(light.x, light.y, 0, light.x, light.y, 1000);
    gradient.addColorStop(0, "#3b4654");
    gradient.addColorStop(1, "#2c343f");
    ctx.fillStyle = gradient;
    ctx.fill();

    ctx.beginPath();
    ctx.arc(light.x, light.y, 20, 0, 2 * Math.PI);
    gradient = ctx.createRadialGradient(light.x, light.y, 0, light.x, light.y, 5);
    gradient.addColorStop(0, "#fff");
    gradient.addColorStop(1, "#3b4654");
    ctx.fillStyle = gradient;
    ctx.fill();
}

function Box() {
    this.half_size = Math.floor((Math.random() * 50) + 1);
    this.x = Math.floor((Math.random() * c.width) + 1);
    this.y = Math.floor((Math.random() * c.height) + 1);
    this.r = Math.random() * Math.PI;
    this.shadow_length = 2000;
    this.color = colors[Math.floor((Math.random() * colors.length))];
  
    this.getDots = function() {

        var full = (Math.PI * 2) / 4;


        var p1 = {
            x: this.x + this.half_size * Math.sin(this.r),
            y: this.y + this.half_size * Math.cos(this.r)
        };
        var p2 = {
            x: this.x + this.half_size * Math.sin(this.r + full),
            y: this.y + this.half_size * Math.cos(this.r + full)
        };
        var p3 = {
            x: this.x + this.half_size * Math.sin(this.r + full * 2),
            y: this.y + this.half_size * Math.cos(this.r + full * 2)
        };
        var p4 = {
            x: this.x + this.half_size * Math.sin(this.r + full * 3),
            y: this.y + this.half_size * Math.cos(this.r + full * 3)
        };

        return {
            p1: p1,
            p2: p2,
            p3: p3,
            p4: p4
        };
    }
    this.rotate = function() {
        var speed = (60 - this.half_size) / 20;
        this.r += speed * 0.002;
        this.x += speed;
        this.y += speed;
    }
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