您的位置:首页 > 其它

随机线条特效

2016-12-13 16:28 190 查看
一次偶然在网上看到一个随机线条页面,看起来狂拽炫酷,今日得空先记录下来~

随机线条

废话不多说,上图:





如上图所示,在登陆界面用到了随机线条作为背景,点击登陆后跳转到自定义的404界面。实现方式如下:

方法1:

引入外部Js:

<script src="http://open.sojson.com/common/js/canvas-nest.min.js" count="200" zindex="-2" opacity="0.5" color="47,135,193" type="text/javascript">
</script>


可以直接使用,open.sojson.com是公开sdn域名,sojson工具站提供流量支持,嘻嘻~

温馨提示:需要将引入的Js放到body里面。



方式二:自己新建js,将js拷贝过去,同样可以使用,引用方式和上面的一样

js代码

! function() {
//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script
return {
l: script_len, //长度,用于生成id用
z: get_attribute(script, "zIndex", -1), //层级
o: get_attribute(script, "opacity", 0.5), //透明度
c: get_attribute(script, "color", "0,0,0"), //线条颜色,最好使用RGB颜色
n: get_attribute(script, "count", 99) //线条数量
};
}
//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 all_array = [current_point].concat(random_lines);
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) {
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
for (i = 0; i < all_array.length; i++) {
e = all_array[i];
//不是当前点
if (r !== e && 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, m
dist < 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 + 0.2) + ")",
context.moveTo(r.x, r.y),
context.lineTo(e.x, e.y),
context.stroke());
}
}
all_array.splice(all_array.indexOf(r), 1);

}), 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 id
context = 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x
y: null, //当前鼠标y
max: 20000
};
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
});
}
//0.1秒后绘制
setTimeout(function() {
draw_canvas();
}, 100);
}();


加载页面

New Add2016.12.22

我的博客------ 首页加载界面实现方式(采用HTML+CSS)

HTML代码

<div class="loading">
<img src="http://images.cnblogs.com/cnblogs_com/zhangxiaoyong/770736/o_zoro.gif" />
<span>永不停歇,向上人生路!</span>
</div>


CSS代码:

.loading {
position: fixed;
top: 0;
z-index: 999;
height: 100%;
width: 100%;
text-align: center;
background: #ffffff;
font-size: 18px;
visibility: hidden;
opacity: 0;
-webkit-animation: loading 3s linear; /**此处是3秒消失,可根据自行需要调整时间**/
}
.loading img {
margin-top: 100px;
}
@-webkit-keyframes loading {
0%{opacity: 1;visibility: visible;}
90%{opacity: 1;}
100%{opacity: 0;visibility: visible;}
}


加载效果

内容来自用户分享和网络整理,不保证内容的准确性,如有侵权内容,可联系管理员处理 点击这里给我发消息
标签: