随鼠标移动的线条

<script type="text/javascript" src="https://cdn.bootcss.com/canvas-nest.js/1.0.1/canvas-nest.min.js">
    /**
     * Copyright (c) 2016 hustcc
     * License: MIT
     * Version: v1.0.1
     * GitHub: https://github.com/hustcc/canvas-nest.js
     **/
    !
        function() {
            function n(n, e, t) {
                return n.getAttribute(e) || t
            }
            function e(n) {
                return document.getElementsByTagName(n)
            }
            function t() {
                var t = e("script"),
                    o = t.length,
                    i = t[o - 1];
                return {
                    l: o,
                    z: n(i, "zIndex", -1),
                    o: n(i, "opacity", .5),
                    c: n(i, "color", "0,0,0"),
                    n: n(i, "count", 99)
                }
            }
            function o() {
                a = m.width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
                    c = m.height = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight
            }
            function i() {
                r.clearRect(0, 0, a, c);
                var n, e, t, o, m, l;
                s.forEach(function(i, x) {
                    for (i.x += i.xa, i.y += i.ya, i.xa *= i.x > a || i.x < 0 ? -1 : 1, i.ya *= i.y > c || i.y < 0 ? -1 : 1, r.fillRect(i.x - .5, i.y - .5, 1, 1), e = x + 1; e < u.length; e++) n = u[e],
                    null !== n.x && null !== n.y && (o = i.x - n.x, m = i.y - n.y, l = o * o + m * m, l < n.max && (n === y && l >= n.max / 2 && (i.x -= .03 * o, i.y -= .03 * m), t = (n.max - l) / n.max, r.beginPath(), r.lineWidth = t / 2, r.strokeStyle = "rgba(" + d.c + "," + (t + .2) + ")", r.moveTo(i.x, i.y), r.lineTo(n.x, n.y), r.stroke()))
                }),
                    x(i)
            }
            var a, c, u, m = document.createElement("canvas"),
                d = t(),
                l = "c_n" + d.l,
                r = m.getContext("2d"),
                x = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame ||
                    function(n) {
                        window.setTimeout(n, 1e3 / 45)
                    },
                w = Math.random,
                y = {
                    x: null,
                    y: null,
                    max: 2e4
                };
            m.id = l,
                m.style.cssText = "position:fixed;top:0;left:0;z-index:" + d.z + ";opacity:" + d.o,
                e("body")[0].appendChild(m),
                o(),
                window.onresize = o,
                window.onmousemove = function(n) {
                    n = n || window.event,
                        y.x = n.clientX,
                        y.y = n.clientY
                },
                window.onmouseout = function() {
                    y.x = null,
                        y.y = null
                };
            for (var s = [], f = 0; d.n > f; f++) {
                var h = w() * a,
                    g = w() * c,
                    v = 2 * w() - 1,
                    p = 2 * w() - 1;
                s.push({
                    x: h,
                    y: g,
                    xa: v,
                    ya: p,
                    max: 6e3
                })
            }
            u = s.concat([y]),
                setTimeout(function() {
                        i()
                    },
                    100)
        } ();
</script> 

猜你喜欢

转载自blog.csdn.net/weixin_41650839/article/details/79496539