vue背景悬浮动画

背景悬浮动画"/>

vue背景悬浮动画

loginAnimation.js

const animation  =()=> {//封装方法，压缩之后减少文件大小function get_attribute(node, attr, default_value) {return node.getAttribute(attr) || default_value;}//封装方法，压缩之后减少文件大小function get_by_tagname(name) {return document.getElementsByTagName(name);}//获取配置参数function get_config_option() {var scripts = get_by_tagname("script"),script_len = scripts.length,script = scripts[script_len - 1]; //当前加载的scriptreturn {l: script_len, //长度，用于生成id用z: get_attribute(script, "zIndex", -1), //z-indexo: get_attribute(script, "opacity", 1), //opacityc: get_attribute(script, "color", "0,0,0"), //colorn: get_attribute(script, "count", 100), //count};}//设置canvas的高宽function set_canvas_size() {(canvas_width = the_canvas.width =window.innerWidth ||document.documentElement.clientWidth ||document.body.clientWidth),(canvas_height = the_canvas.height =window.innerHeight ||document.documentElement.clientHeight ||document.body.clientHeight);}//绘制过程function draw_canvas() {context.clearRect(0, 0, canvas_width, canvas_height);//随机的线条和当前位置联合数组var e, i, d, x_dist, y_dist, dist; //临时节点//遍历处理每一个点random_lines.forEach(function (r, idx) {(r.x += r.xa),(r.y += r.ya), //移动(r.xa *= r.x > canvas_width || r.x < 0 ? -1 : 1),(r.ya *= r.y > canvas_height || r.y < 0 ? -1 : 1), //碰到边界，反向反弹context.fillRect(r.x - 0.5, r.y - 0.5, 1, 1); //绘制一个宽高为1的点//从下一个点开始for (i = idx + 1; i < all_array.length; i++) {e = all_array[i];//不是当前点if (null !== e.x && null !== e.y) {(x_dist = r.x - e.x), //x轴距离 l(y_dist = r.y - e.y), //y轴距离 n(dist = x_dist * x_dist + y_dist * y_dist); //总距离, mdist < e.max &&(e === current_point &&dist >= e.max / 2 &&((r.x -= 0.03 * x_dist), (r.y -= 0.03 * y_dist)), //靠近的时候加速(d = (e.max - dist) / e.max),context.beginPath(),(context.lineWidth = d / 2),(context.strokeStyle = "rgba(" + config.c + "," + (d + 0.9) + ")"),context.moveTo(r.x, r.y),context.lineTo(e.x, e.y),context.stroke());}}}),frame_func(draw_canvas);}//创建画布，并添加到body中var the_canvas = document.createElement("canvas"), //画布config = get_config_option(), //配置canvas_id = "c_n" + config.l, //canvas idcontext = the_canvas.getContext("2d"),canvas_width,canvas_height,frame_func =window.requestAnimationFrame ||window.webkitRequestAnimationFrame ||window.mozRequestAnimationFrame ||window.oRequestAnimationFrame ||window.msRequestAnimationFrame ||function (func) {window.setTimeout(func, 1000 / 45);},random = Math.random,current_point = {x: null, //当前鼠标xy: null, //当前鼠标ymax: 20000,},all_array;the_canvas.id = canvas_id;the_canvas.style.cssText ="position:fixed;top:0;left:0;z-index:" + config.z + ";opacity:" + config.o;get_by_tagname("body")[0].appendChild(the_canvas);//初始化画布大小set_canvas_size(), (window.onresize = set_canvas_size);//当时鼠标位置存储，离开的时候，释放当前位置信息(window.onmousemove = function (e) {(e = e || window.event),(current_point.x = e.clientX),(current_point.y = e.clientY);}),(window.onmouseout = function () {(current_point.x = null), (current_point.y = null);});//随机生成config.n条线位置信息for (var random_lines = [], i = 0; config.n > i; i++) {var x = random() * canvas_width, //随机位置y = random() * canvas_height,xa = 2 * random() - 1, //随机运动方向ya = 2 * random() - 1;random_lines.push({x: x,y: y,xa: xa,ya: ya,max: 6000, //沾附距离});}all_array = random_lines.concat([current_point]);//0.1秒后绘制setTimeout(function () {draw_canvas();}, 100);}export default animation

demo.vue引入

<script>
import animation from "./loginAnimation.js";
export default {data() {return {};},created() {animation();},methods: {},
};
</script>