tuanfeng-pc-settle/static/js/canvas-nest.min.js

/*
 * @Author: aliyun0758874076 2300202994@qq.com
 * @Date: 2023-08-30 11:07:46
 * @LastEditors: aliyun0758874076 2300202994@qq.com
 * @LastEditTime: 2023-09-14 17:28:02
 * @FilePath: \公司发展事件时间轴js特效\js\canvas-nest.min.js
 * @Description: 这是默认设置,请设置`customMade`, 打开koroFileHeader查看配置 进行设置: https://github.com/OBKoro1/koro1FileHeader/wiki/%E9%85%8D%E7%BD%AE
 */
!(function () {
    function o (w, v, i) {
        return w.getAttribute(v) || i
    }

    function j (i) {
        return document.getElementsByTagName(i)
    }

    function l () {
        var i = j('script'),
            w = i.length,
            v = i[w - 1]
        return {
            l: w,
            z: o(v, 'zIndex', 999),
            o: o(v, 'opacity', 1), // 控制透明度
            c: o(v, 'color', '255,255,255'),
            n: o(v, 'count', 299) // 控制数量
        }
    }

    function k () {
        r = u.width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth, n = u.height = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight
    }

    function b () {
        e.clearRect(0, 0, r, n)
        var w = [f].concat(t)
        var x, v, A, B, z, y
        t.forEach(function (i) {
            i.x += i.xa, i.y += i.ya, i.xa *= i.x > r || i.x < 0 ? -1 : 1, i.ya *= i.y > n || i.y < 0 ? -1 : 1, e.fillRect(i.x - 0.5, i.y - 0.5, 1, 1)
            for (v = 0; v < w.length; v++) {
                x = w[v]
                if (i !== x && x.x !== null && x.y !== null) {
                    B = i.x - x.x, z = i.y - x.y, y = B * B + z * z
                    y < x.max && (x === f && y >= x.max / 2 && (i.x -= 0.03 * B, i.y -= 0.03 * z), A = (x.max - y) / x.max, e.beginPath(), e.lineWidth = A / 2, e.strokeStyle = 'rgba(' + s.c + ',' + (A + 0.2) + ')', e.moveTo(i.x, i.y), e.lineTo(x.x, x.y), e.stroke())
                }
            }
            w.splice(w.indexOf(i), 1)
        }), m(b)
    }
    var u = document.createElement('canvas'),
        s = l(),
        c = 'c_n' + s.l,
        e = u.getContext('2d'),
        r, n, m = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (i) {
            window.setTimeout(i, 1000 / 45)
        },
        a = Math.random,
        f = {
            x: null,
            y: null,
            max: 20000
        }
    u.id = c
    u.style.cssText = 'position:fixed;top:0;pointer-events:none;left:0;z-index:' + s.z + ';opacity:' + s.o
    j('body')[0].appendChild(u)
    k(), window.onresize = k
    window.onmousemove = function (i) {
        i = i || window.event, f.x = i.clientX, f.y = i.clientY
    }, window.onmouseout = function () {
        f.x = null, f.y = null
    }
    for (var t = [], p = 0; s.n > p; p++) {
        var h = a() * r,
            g = a() * n,
            q = 2 * a() - 1,
            d = 2 * a() - 1
            // console.log(r,n) // 屏幕的大小
            // console.log(q,d) // 初始的位置偏移量
        t.push({
            x: h,
            y: g,
            xa: q,
            ya: d,
            max: 9000
        })
    }
    setTimeout(function () {
        b()
    }, 10)
}())