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particle-canvas.html
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<!DOCTYPE html>
<html style="display: none;" lang="zh">
<head>
<meta charset="utf-8">
<!--
© Material Theme
https://github.com/viosey/hexo-theme-material
Version: 1.5.2 -->
<script>
window.materialVersion = "1.5.2"
// Delete localstorage with these tags
window.oldVersion = [
'codestartv1',
'1.3.4',
'1.4.0',
'1.4.0b1',
'1.5.0'
]
</script>
<!-- dns prefetch -->
<meta http-equiv="x-dns-prefetch-control" content="on">
<link rel="dns-prefetch" href="https://cdn1.lncld.net"/>
<!-- Meta & Info -->
<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1">
<meta name="renderer" content="webkit">
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
<!-- Title -->
<title>
canvas粒子背景 |
黄明照--一个在路上慢慢行走的前端人
</title>
<!-- Favicons -->
<link rel="icon shortcut" type="image/ico" href="/img/favicon.png">
<link rel="icon" href="/img/favicon.png">
<meta name="format-detection" content="telephone=no"/>
<meta name="description" itemprop="description" content="根据网上的思路用canvas实现之前知乎的粒子背景。
github 地址example
">
<meta name="keywords" content="黄明照、黄明照的个人博客、黄明照的个人网站、一个在路上慢慢行走的前端人,Canvas">
<meta name="theme-color" content="#0097A7">
<!-- Disable Fucking Bloody Baidu Tranformation -->
<meta http-equiv="Cache-Control" content="no-transform" />
<meta http-equiv="Cache-Control" content="no-siteapp" />
<!--[if lte IE 9]>
<link rel="stylesheet" href="/css/ie-blocker.css">
<script src="/js/ie-blocker.zhCN.js"></script>
<![endif]-->
<!-- Import lsloader -->
<script>(function(){window.lsloader={jsRunSequence:[],jsnamemap:{},cssnamemap:{}};lsloader.removeLS=function(a){try{localStorage.removeItem(a)}catch(b){}};lsloader.setLS=function(a,c){try{localStorage.setItem(a,c)}catch(b){}};lsloader.getLS=function(a){var c="";try{c=localStorage.getItem(a)}catch(b){c=""}return c};versionString="/*"+(window.materialVersion||"unknownVersion")+"*/";lsloader.clean=function(){try{var b=[];for(var a=0;a<localStorage.length;a++){b.push(localStorage.key(a))}b.forEach(function(e){var f=lsloader.getLS(e);if(window.oldVersion){var d=window.oldVersion.reduce(function(g,h){return g||f.indexOf("/*"+h+"*/")!==-1},false);if(d){lsloader.removeLS(e)}}})}catch(c){}};lsloader.clean();lsloader.load=function(f,a,b,d){if(typeof b==="boolean"){d=b;b=undefined}d=d||false;b=b||function(){};var e;e=this.getLS(f);if(e&&e.indexOf(versionString)===-1){this.removeLS(f);this.requestResource(f,a,b,d);return}if(e){var c=e.split(versionString)[0];if(c!=a){console.log("reload:"+a);this.removeLS(f);this.requestResource(f,a,b,d);return}e=e.split(versionString)[1];if(d){this.jsRunSequence.push({name:f,code:e});this.runjs(a,f,e)}else{document.getElementById(f).appendChild(document.createTextNode(e));b()}}else{this.requestResource(f,a,b,d)}};lsloader.requestResource=function(b,e,a,c){var d=this;if(c){this.iojs(e,b,function(h,f,g){d.setLS(f,h+versionString+g);d.runjs(h,f,g)})}else{this.iocss(e,b,function(f){document.getElementById(b).appendChild(document.createTextNode(f));d.setLS(b,e+versionString+f)},a)}};lsloader.iojs=function(d,b,g){var a=this;a.jsRunSequence.push({name:b,code:""});try{var f=new XMLHttpRequest();f.open("get",d,true);f.onreadystatechange=function(){if(f.readyState==4){if((f.status>=200&&f.status<300)||f.status==304){if(f.response!=""){g(d,b,f.response);return}}a.jsfallback(d,b)}};f.send(null)}catch(c){a.jsfallback(d,b)}};lsloader.iocss=function(f,c,h,a){var b=this;try{var g=new XMLHttpRequest();g.open("get",f,true);g.onreadystatechange=function(){if(g.readyState==4){if((g.status>=200&&g.status<300)||g.status==304){if(g.response!=""){h(g.response);a();return}}b.cssfallback(f,c,a)}};g.send(null)}catch(d){b.cssfallback(f,c,a)}};lsloader.iofonts=function(f,c,h,a){var b=this;try{var g=new XMLHttpRequest();g.open("get",f,true);g.onreadystatechange=function(){if(g.readyState==4){if((g.status>=200&&g.status<300)||g.status==304){if(g.response!=""){h(g.response);a();return}}b.cssfallback(f,c,a)}};g.send(null)}catch(d){b.cssfallback(f,c,a)}};lsloader.runjs=function(f,c,e){if(!!c&&!!e){for(var b in this.jsRunSequence){if(this.jsRunSequence[b].name==c){this.jsRunSequence[b].code=e}}}if(!!this.jsRunSequence[0]&&!!this.jsRunSequence[0].code&&this.jsRunSequence[0].status!="failed"){var a=document.createElement("script");a.appendChild(document.createTextNode(this.jsRunSequence[0].code));a.type="text/javascript";document.getElementsByTagName("head")[0].appendChild(a);this.jsRunSequence.shift();if(this.jsRunSequence.length>0){this.runjs()}}else{if(!!this.jsRunSequence[0]&&this.jsRunSequence[0].status=="failed"){var d=this;var a=document.createElement("script");a.src=this.jsRunSequence[0].path;a.type="text/javascript";this.jsRunSequence[0].status="loading";a.onload=function(){d.jsRunSequence.shift();if(d.jsRunSequence.length>0){d.runjs()}};document.body.appendChild(a)}}};lsloader.tagLoad=function(b,a){this.jsRunSequence.push({name:a,code:"",path:b,status:"failed"});this.runjs()};lsloader.jsfallback=function(c,b){if(!!this.jsnamemap[b]){return}else{this.jsnamemap[b]=b}for(var a in this.jsRunSequence){if(this.jsRunSequence[a].name==b){this.jsRunSequence[a].code="";this.jsRunSequence[a].status="failed";this.jsRunSequence[a].path=c}}this.runjs()};lsloader.cssfallback=function(e,c,b){if(!!this.cssnamemap[c]){return}else{this.cssnamemap[c]=1}var d=document.createElement("link");d.type="text/css";d.href=e;d.rel="stylesheet";d.onload=d.onerror=b;var a=document.getElementsByTagName("script")[0];a.parentNode.insertBefore(d,a)};lsloader.runInlineScript=function(c,b){var a=document.getElementById(b).innerText;this.jsRunSequence.push({name:c,code:a});this.runjs()}})();</script>
<!-- Import queue -->
<script>function Queue(){this.dataStore=[];this.offer=b;this.poll=d;this.execNext=a;this.debug=false;this.startDebug=c;function b(e){if(this.debug){console.log("Offered a Queued Function.")}if(typeof e==="function"){this.dataStore.push(e)}else{console.log("You must offer a function.")}}function d(){if(this.debug){console.log("Polled a Queued Function.")}return this.dataStore.shift()}function a(){var e=this.poll();if(e!==undefined){if(this.debug){console.log("Run a Queued Function.")}e()}}function c(){this.debug=true}}var queue=new Queue();</script>
<!-- Import CSS -->
<style id="material_css"></style><script>if(typeof window.lsLoadCSSMaxNums === "undefined")window.lsLoadCSSMaxNums = 0;window.lsLoadCSSMaxNums++;lsloader.load("material_css","/css/material.min.css?Z7a72R1E4SxzBKR/WGctOA==",function(){if(typeof window.lsLoadCSSNums === "undefined")window.lsLoadCSSNums = 0;window.lsLoadCSSNums++;if(window.lsLoadCSSNums == window.lsLoadCSSMaxNums)document.documentElement.style.display="";}, false)</script>
<style id="style_css"></style><script>if(typeof window.lsLoadCSSMaxNums === "undefined")window.lsLoadCSSMaxNums = 0;window.lsLoadCSSMaxNums++;lsloader.load("style_css","/css/style.min.css?MKetZV3cUTfDxvMffaOezg==",function(){if(typeof window.lsLoadCSSNums === "undefined")window.lsLoadCSSNums = 0;window.lsLoadCSSNums++;if(window.lsLoadCSSNums == window.lsLoadCSSMaxNums)document.documentElement.style.display="";}, false)</script>
<!-- Config CSS -->
<!-- Other Styles -->
<style>
body, html {
font-family: Roboto, "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
overflow-x: hidden !important;
}
code {
font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
}
a {
color: #00838F;
}
.mdl-card__media,
#search-label,
#search-form-label:after,
#scheme-Paradox .hot_tags-count,
#scheme-Paradox .sidebar_archives-count,
#scheme-Paradox .sidebar-colored .sidebar-header,
#scheme-Paradox .sidebar-colored .sidebar-badge{
background-color: #0097A7 !important;
}
/* Sidebar User Drop Down Menu Text Color */
#scheme-Paradox .sidebar-colored .sidebar-nav>.dropdown>.dropdown-menu>li>a:hover,
#scheme-Paradox .sidebar-colored .sidebar-nav>.dropdown>.dropdown-menu>li>a:focus {
color: #0097A7 !important;
}
#post_entry-right-info,
.sidebar-colored .sidebar-nav li:hover > a,
.sidebar-colored .sidebar-nav li:hover > a i,
.sidebar-colored .sidebar-nav li > a:hover,
.sidebar-colored .sidebar-nav li > a:hover i,
.sidebar-colored .sidebar-nav li > a:focus i,
.sidebar-colored .sidebar-nav > .open > a,
.sidebar-colored .sidebar-nav > .open > a:hover,
.sidebar-colored .sidebar-nav > .open > a:focus,
#ds-reset #ds-ctx .ds-ctx-entry .ds-ctx-head a {
color: #0097A7 !important;
}
.toTop {
background: #757575 !important;
}
.material-layout .material-post>.material-nav,
.material-layout .material-index>.material-nav,
.material-nav a {
color: #757575;
}
#scheme-Paradox .MD-burger-layer {
background-color: #757575;
}
#scheme-Paradox #post-toc-trigger-btn {
color: #757575;
}
.post-toc a:hover {
color: #00838F;
text-decoration: underline;
}
</style>
<!-- Theme Background Related-->
<style>
body{
background-color: #fff;
}
/* blog_info bottom background */
#scheme-Paradox .material-layout .something-else .mdl-card__supporting-text{
background-color: #fff;
}
</style>
<!-- Fade Effect -->
<style>
.fade {
transition: all 800ms linear;
-webkit-transform: translate3d(0,0,0);
-moz-transform: translate3d(0,0,0);
-ms-transform: translate3d(0,0,0);
-o-transform: translate3d(0,0,0);
transform: translate3d(0,0,0);
opacity: 1;
}
.fade.out{
opacity: 0;
}
</style>
<!-- Import Font -->
<!-- Import Roboto -->
<link href="https://fonts.googleapis.com/css?family=Roboto:300,400,500" rel="stylesheet">
<!-- Import Material Icons -->
<style id="material_icons"></style><script>if(typeof window.lsLoadCSSMaxNums === "undefined")window.lsLoadCSSMaxNums = 0;window.lsLoadCSSMaxNums++;lsloader.load("material_icons","/css/material-icons.css?pqhB/Rd/ab0H2+kZp0RDmw==",function(){if(typeof window.lsLoadCSSNums === "undefined")window.lsLoadCSSNums = 0;window.lsLoadCSSNums++;if(window.lsLoadCSSNums == window.lsLoadCSSMaxNums)document.documentElement.style.display="";}, false)</script>
<!-- Import jQuery -->
<script>lsloader.load("jq_js","/js/jquery.min.js?qcusAULNeBksqffqUM2+Ig==", true)</script>
<!-- WebAPP Icons -->
<meta name="mobile-web-app-capable" content="yes">
<meta name="application-name" content="黄明照--一个在路上慢慢行走的前端人">
<meta name="msapplication-starturl" content="http://www.huangmingzhao.cn/particle-canvas.html">
<meta name="msapplication-navbutton-color" content="#0097A7">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-title" content="黄明照--一个在路上慢慢行走的前端人">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<link rel="apple-touch-icon" href="/img/favicon.png">
<!-- Site Verification -->
<!-- RSS -->
<!-- The Open Graph protocol -->
<meta property="og:url" content="http://www.huangmingzhao.cn/particle-canvas.html">
<meta property="og:type" content="blog">
<meta property="og:title" content="canvas粒子背景 | 黄明照--一个在路上慢慢行走的前端人">
<meta property="og:image" content="/img/favicon.png">
<meta property="og:description" content="根据网上的思路用canvas实现之前知乎的粒子背景。
github 地址example
">
<meta property="og:article:tag" content="Canvas">
<meta property="article:published_time" content="Wed Feb 28 2018 10:31:01 GMT+0800">
<meta property="article:modified_time" content="Fri Mar 02 2018 15:24:41 GMT+0800">
<!-- The Twitter Card protocol -->
<meta name="twitter:card" content="summary_large_image">
<!-- Add canonical link for SEO -->
<link rel="canonical" href="http://www.huangmingzhao.cn/particle-canvas.html" />
<!-- Structured-data for SEO -->
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "BlogPosting",
"mainEntityOfPage": "http://www.huangmingzhao.cn/particle-canvas.html",
"headline": "canvas粒子背景",
"datePublished": "Wed Feb 28 2018 10:31:01 GMT+0800",
"dateModified": "Fri Mar 02 2018 15:24:41 GMT+0800",
"author": {
"@type": "Person",
"name": "黄明照",
"image": {
"@type": "ImageObject",
"url": "/img/avatar1.jpg"
},
"description": "Be A Hero To Myself"
},
"publisher": {
"@type": "Organization",
"name": "黄明照--一个在路上慢慢行走的前端人",
"logo": {
"@type":"ImageObject",
"url": "/img/favicon.png"
}
},
"keywords": ",Canvas黄明照、黄明照的个人博客、黄明照的个人网站、一个在路上慢慢行走的前端人",
"description": "根据网上的思路用canvas实现之前知乎的粒子背景。
github 地址example
",
}
</script>
<!-- Analytics -->
<script>
var _hmt = _hmt || [];
(function() {var hm = document.createElement('script');
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<ol class="post-toc"><li class="post-toc-item post-toc-level-2"><a class="post-toc-link" href="#主要思路"><span class="post-toc-number">1.</span> <span class="post-toc-text">主要思路</span></a><ol class="post-toc-child"><li class="post-toc-item post-toc-level-4"><a class="post-toc-link" href="#需要一张-Canvas-画布"><span class="post-toc-number">1.0.1.</span> <span class="post-toc-text">需要一张 Canvas 画布</span></a></li><li class="post-toc-item post-toc-level-4"><a class="post-toc-link" href="#在画布上绘制许多个小点"><span class="post-toc-number">1.0.2.</span> <span class="post-toc-text">在画布上绘制许多个小点</span></a></li><li class="post-toc-item post-toc-level-4"><a class="post-toc-link" href="#小点会来回移动-amp-边界回弹"><span class="post-toc-number">1.0.3.</span> <span class="post-toc-text">小点会来回移动 & 边界回弹</span></a></li><li class="post-toc-item post-toc-level-4"><a class="post-toc-link" href="#每两个小点之间在一定距离之内，绘制线"><span class="post-toc-number">1.0.4.</span> <span class="post-toc-text">每两个小点之间在一定距离之内，绘制线</span></a></li><li class="post-toc-item post-toc-level-4"><a class="post-toc-link" href="#当鼠标移入的时候，让内部的小点跟随鼠标的移动"><span class="post-toc-number">1.0.5.</span> <span class="post-toc-text">当鼠标移入的时候，让内部的小点跟随鼠标的移动</span></a></li></ol></li></ol></li><li class="post-toc-item post-toc-level-2"><a class="post-toc-link" href="#Basic-Usage"><span class="post-toc-number">2.</span> <span class="post-toc-text">Basic Usage</span></a></li></ol>
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<strong>黄明照</strong>
<span>2月 28, 2018</span>
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<p>根据网上的思路用canvas实现之前知乎的粒子背景。 </p>
<blockquote>
<p><a href="https://github.com/ishareme/Particle/" target="_blank" rel="noopener">github 地址</a><br><a href="https://github.com/ishareme/ParticleCanvas/" target="_blank" rel="noopener">example</a></p>
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<h2 id="主要思路"><a href="#主要思路" class="headerlink" title="主要思路"></a>主要思路</h2><ul>
<li>需要一张 Canvas 画布</li>
<li>在画布上绘制许多个小点</li>
<li>小点会来回移动</li>
<li>小点移动到边框的时候需要回弹</li>
<li>每两个小点之间在一定距离之内，绘制线</li>
<li>当鼠标移入的时候，让内部的小点跟随鼠标的移动</li>
</ul>
<h4 id="需要一张-Canvas-画布"><a href="#需要一张-Canvas-画布" class="headerlink" title="需要一张 Canvas 画布"></a>需要一张 Canvas 画布</h4><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">this</span>.ctx = <span class="keyword">this</span>.canvas.getContext(<span class="string">'2d'</span>);</span><br><span class="line"><span class="keyword">this</span>.canvas.width = <span class="built_in">window</span>.innerWidth || <span class="built_in">document</span>.documentElement.clientWidth || <span class="built_in">document</span>.body.clientWidth;</span><br><span class="line"><span class="keyword">this</span>.canvas.height = <span class="built_in">window</span>.innerHeight || <span class="built_in">document</span>.documentElement.clientHeight || <span class="built_in">document</span>.body.clientHeight;</span><br><span class="line"><span class="keyword">this</span>.drawBackground();</span><br></pre></td></tr></table></figure>
<h4 id="在画布上绘制许多个小点"><a href="#在画布上绘制许多个小点" class="headerlink" title="在画布上绘制许多个小点"></a>在画布上绘制许多个小点</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line">for(let i = 0; i < this.options.particleNum; i++){</span><br><span class="line"> let circleX = utils.randomNumber(this.canvas.width);</span><br><span class="line"> let circleY = utils.randomNumber(this.canvas.height);</span><br><span class="line"> let circleVX = utils.randomNumber(this.options.particleSpeed, this.options.particleSpeed * -1) / 20;</span><br><span class="line"> let circleVY = utils.randomNumber(this.options.particleSpeed, this.options.particleSpeed * -1) / 20;</span><br><span class="line"> let circleR = this.options.particleR;</span><br><span class="line"> let circleColor = utils.randomColor();</span><br><span class="line"> this.circleArr.push(new Circle(circleX, circleY, circleVX, circleVY, circleR, circleColor));</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> //包括鼠标的位置</span><br><span class="line"> this.circleArrAll = [this.mousePoint].concat(this.circleArr);</span><br></pre></td></tr></table></figure>
<h4 id="小点会来回移动-amp-边界回弹"><a href="#小点会来回移动-amp-边界回弹" class="headerlink" title="小点会来回移动 & 边界回弹"></a>小点会来回移动 & 边界回弹</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">item.x += item.vx;</span><br><span class="line"> item.y += item.vy;</span><br><span class="line"> //圆点移动到边框的时候需要回弹</span><br><span class="line"> item.vx *= (item.x <= 0 || item.x >= (this.canvas.width - item.r)) ? -1 : 1;</span><br><span class="line"> item.vy *= (item.y <= 0 || item.y >= (this.canvas.height - item.r)) ? -1 : 1;</span><br></pre></td></tr></table></figure>
<h4 id="每两个小点之间在一定距离之内，绘制线"><a href="#每两个小点之间在一定距离之内，绘制线" class="headerlink" title="每两个小点之间在一定距离之内，绘制线"></a>每两个小点之间在一定距离之内，绘制线</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><span class="line">this.circleArr.forEach((item) => {</span><br><span class="line"> this.ctx.fillStyle = item.color;</span><br><span class="line"> this.ctx.beginPath();</span><br><span class="line"></span><br><span class="line"> //圆点移动</span><br><span class="line"> this.circleMove(item);</span><br><span class="line"></span><br><span class="line"> this.ctx.arc(item.x, item.y, item.r, 0, 2 * Math.PI, true);</span><br><span class="line"> this.ctx.fill();</span><br><span class="line"></span><br><span class="line"> for (var i=0; i < this.circleArrAll.length; i++){</span><br><span class="line"> var currCircle = this.circleArrAll[i];</span><br><span class="line"> //如果是同项 或者 当 mousePoint 还未赋值就跳过</span><br><span class="line"> if (item === currCircle || currCircle.x === null || currCircle.y === null) continue;</span><br><span class="line"> //每两个圆点之间在一定距离(this.options.lineLength)之内，绘制线</span><br><span class="line"> if (utils.dis(item, currCircle) < this.options.lineLength){</span><br><span class="line"> //当鼠标移入的时候，让内部的圆点跟随鼠标的移动</span><br><span class="line"> //在 距离(utils.dis2(item, currCircle) > (this.options.lineLength * this.options.lineLength) /2)内 圆点跟随鼠标的移动</span><br><span class="line"> if (currCircle === this.mousePoint && utils.dis2(item, currCircle) > (this.options.lineLength * this.options.lineLength) /2){</span><br><span class="line"> //圆点跟随鼠标的移动</span><br><span class="line"> this.moveToMousePoint(item, currCircle);</span><br><span class="line"> }</span><br><span class="line"> //绘制线</span><br><span class="line"> this.drawLine(item, currCircle);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> });</span><br></pre></td></tr></table></figure>
<h4 id="当鼠标移入的时候，让内部的小点跟随鼠标的移动"><a href="#当鼠标移入的时候，让内部的小点跟随鼠标的移动" class="headerlink" title="当鼠标移入的时候，让内部的小点跟随鼠标的移动"></a>当鼠标移入的时候，让内部的小点跟随鼠标的移动</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line">if (utils.dis(item, currCircle) < this.options.lineLength){</span><br><span class="line"> //当鼠标移入的时候，让内部的圆点跟随鼠标的移动</span><br><span class="line"> //在 距离(utils.dis2(item, currCircle) > (this.options.lineLength * this.options.lineLength) /2)内 圆点跟随鼠标的移动</span><br><span class="line"> if (currCircle === this.mousePoint && utils.dis2(item, currCircle) > (this.options.lineLength * this.options.lineLength) /2){</span><br><span class="line"> //圆点跟随鼠标的移动</span><br><span class="line"> this.moveToMousePoint(item, currCircle);</span><br><span class="line"> }</span><br><span class="line"> //绘制线</span><br><span class="line"> this.drawLine(item, currCircle);</span><br><span class="line"> }</span><br><span class="line"> </span><br><span class="line">moveToMousePoint(item, currCircle){</span><br><span class="line"> // 小圆点的向鼠标点移动</span><br><span class="line"> item.x -= (item.x - currCircle.x) * 0.03;</span><br><span class="line"> item.y -= (item.y - currCircle.y) * 0.03;</span><br><span class="line"> },</span><br></pre></td></tr></table></figure>
<h2 id="Basic-Usage"><a href="#Basic-Usage" class="headerlink" title="Basic Usage"></a>Basic Usage</h2><figure class="highlight sh"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br></pre></td><td class="code"><pre><span class="line">Particle</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"> //参数一 canvas的id, class 或 canvas [必填]</span><br><span class="line"> //参数二 配置项 [可选]</span><br><span class="line"> new Particle(<span class="string">'#test'</span>,{</span><br><span class="line"> //画布背景(默认 <span class="comment">#FFF)[可选]</span></span><br><span class="line"> background: <span class="string">'#000'</span>,</span><br><span class="line"> //粒子数(默认 300)[可选]</span><br><span class="line"> particleNum: 300,</span><br><span class="line"> //粒子半径(默认 1)[可选]</span><br><span class="line"> particleR: 1,</span><br><span class="line"> //粒子移动速度(默认 10)[可选]</span><br><span class="line"> particleSpeed: 10,</span><br><span class="line"> //线长度(默认 70)[可选]</span><br><span class="line"> lineLength: 30,</span><br><span class="line"> //线宽度(默认 0.5)[可选]</span><br><span class="line"> lineWidth: 0.5,</span><br><span class="line"> //鼠标心颜色(默认 <span class="comment">#000)[可选]</span></span><br><span class="line"> mousePointColor: <span class="string">'#FFF'</span></span><br><span class="line"> })</span><br></pre></td></tr></table></figure>
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<a href="https://github.com/ishareme" target="_blank" title="Github">
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<a class="sidebar_archives-link" href="/archives/2018/10/">十月 2018<span class="sidebar_archives-count">1</span></a></li><li><a class="sidebar_archives-link" href="/archives/2018/08/">八月 2018<span class="sidebar_archives-count">2</span></a></li><li><a class="sidebar_archives-link" href="/archives/2018/03/">三月 2018<span class="sidebar_archives-count">3</span></a></li><li><a class="sidebar_archives-link" href="/archives/2018/02/">二月 2018<span class="sidebar_archives-count">6</span></a></li><li><a class="sidebar_archives-link" href="/archives/2018/01/">一月 2018<span class="sidebar_archives-count">1</span></a></li><li><a class="sidebar_archives-link" href="/archives/2017/10/">十月 2017<span class="sidebar_archives-count">3</span></a></li><li><a class="sidebar_archives-link" href="/archives/2017/08/">八月 2017<span class="sidebar_archives-count">3</span></a></li><li><a class="sidebar_archives-link" href="/archives/2017/07/">七月 2017<span class="sidebar_archives-count">2</span></a>
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<a class="sidebar_archives-link" href="/categories/渣技术/">渣技术<span class="sidebar_archives-count">18</span></a></li><li><a class="sidebar_archives-link" href="/categories/闲言语/">闲言语<span class="sidebar_archives-count">1</span></a>
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<a href="https://github.com/ishareme" title="Github">
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</a>
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文章总数
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I'm glad you use this theme, the development is no so easy, I hope you can keep the copyright, I will thank you so much.
If you still want to delete the copyrights, could you still retain the first one? Which namely "Theme Material"
It will not impact the appearance and can give developers a lot of support :)
很高兴您使用并喜欢该主题，开发不易 十分谢谢与希望您可以保留一下版权声明。
如果您仍然想删除的话 能否只保留第一项呢？即 "Theme Material"
它不会影响美观并可以给开发者很大的支持和动力。 :)
-->
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Copyright © 2017 -<script type="text/javascript">var fd = new Date();document.write(" " + fd.getFullYear() + " ");</script>黄明照--一个在路上慢慢行走的前端人
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<!--
I am glad you use this theme, the development is no so easy, I hope you can keep the copyright.
It will not impact the appearance and can give developers a lot of support :)
很高兴您使用该主题，开发不易，希望您可以保留一下版权声明。
它不会影响美观并可以给开发者很大的支持。 :)
-->
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