ParticlesJS的使用详解
particles.js
A lightweight JavaScript library for creating particles.
一个轻量级的创建粒子背景的 JavaScript 库
那么,下面将介绍如何使用 particles.js 。
particlesJS 开源在Github上:https://github.com/VincentGarreau/particles.js
这个项目中有提供demo,可以直接下载这个项目,打开demo里面的index.html文件,即可看到效果。
那么,如果我们要构建自己的项目,该如何引入文件呢?
建议如下:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>particles.js</title> <meta name="description" content="particles.js is a lightweight JavaScript library for creating particles."> <meta name="author" content="Vincent Garreau" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"> <link rel="stylesheet" media="screen" href="css/style.css" rel="external nofollow" > </head> <body> <p id="particles-js"></p> <!-- scripts --> <script src="js/particles.js"></script> <script src="js/app.js"></script> </body> </html>
particles.js 是它的库,我们肯定是要引入的,app.js 是参数配置文件,我们也要引入,而 demo 中的 stats.js 就没有必要引入了。
style.css 我们也可以引入,背景颜色是在css中设置的。
基于这个模板,我们可以在上面添加我们想要实现的功能,比如说注册登录功能,需要注意的是:
用 p 来封装我们要实现的功能代码块,并且在 css 中为这个 p 设置绝对定位。
下面介绍参数配置文件 app.js 文件的使用:
particles.number.value : 粒子的数量
particles.number.density : 粒子的稀密程度
particles.number.density.enable : 启用粒子的稀密程度 (true 或 false)
particles.number.density.value_area : 每一个粒子占据的空间(启用粒子密度,才可用)
particles.color.value : 粒子的颜色 (支持16进制”#b61924”,rgb”{r:182, g:25, b:36}”,hsl,以及random)
particles.shape.type: 粒子的形状 (”circle” “edge” “triangle” “polygon” “star” “image”)
particles.opacity.value: 粒子的透明度
particles.size.anim.enable: 是否启用粒子速度(true/false)
particles.size.anim.speed: 粒子动画频率
particles.size.anim.sync: 粒子运行速度与动画是否同步
particles.move.speed: 粒子移动速度
大家可以根据这些配置文件,配置自己喜欢的背景出来,下面提供两份完整配置文件 app.js。
配置文件一(经典背景):
{ "particles": { "number": { "value": 80, "density": { "enable": true, "value_area": 800 } }, "color": { "value": "#ffffff" }, "shape": { "type": "polygon", "stroke": { "width": 0, "color": "#000000" }, "polygon": { "nb_sides": 5 }, "image": { "src": "img/github.svg", "width": 100, "height": 100 } }, "opacity": { "value": 0.5, "random": false, "anim": { "enable": false, "speed": 1, "opacity_min": 0.1, "sync": false } }, "size": { "value": 3, "random": true, "anim": { "enable": false, "speed": 40, "size_min": 0.1, "sync": false } }, "line_linked": { "enable": true, "distance": 150, "color": "#ffffff", "opacity": 0.4, "width": 1 }, "move": { "enable": true, "speed": 6, "direction": "none", "random": false, "straight": false, "out_mode": "out", "bounce": false, "attract": { "enable": false, "rotateX": 600, "rotateY": 1200 } } }, "interactivity": { "detect_on": "canvas", "events": { "onhover": { "enable": true, "mode": "repulse" }, "onclick": { "enable": true, "mode": "push" }, "resize": true }, "modes": { "grab": { "distance": 400, "line_linked": { "opacity": 1 } }, "bubble": { "distance": 400, "size": 40, "duration": 2, "opacity": 8, "speed": 3 }, "repulse": { "distance": 200, "duration": 0.4 }, "push": { "particles_nb": 4 }, "remove": { "particles_nb": 2 } } }, "retina_detect": false }
配置文件二(星空背景):
{ "particles": { "number": { "value": 160, "density": { "enable": true, "value_area": 800 } }, "color": { "value": "#ffffff" }, "shape": { "type": "circle", "stroke": { "width": 0, "color": "#000000" }, "polygon": { "nb_sides": 5 }, "image": { "src": "img/github.svg", "width": 100, "height": 100 } }, "opacity": { "value": 1, "random": true, "anim": { "enable": true, "speed": 1, "opacity_min": 0, "sync": false } }, "size": { "value": 3, "random": true, "anim": { "enable": false, "speed": 4, "size_min": 0.3, "sync": false } }, "line_linked": { "enable": false, "distance": 150, "color": "#ffffff", "opacity": 0.4, "width": 1 }, "move": { "enable": true, "speed": 1, "direction": "none", "random": true, "straight": false, "out_mode": "out", "bounce": false, "attract": { "enable": false, "rotateX": 600, "rotateY": 600 } } }, "interactivity": { "detect_on": "canvas", "events": { "onhover": { "enable": true, "mode": "bubble" }, "onclick": { "enable": true, "mode": "repulse" }, "resize": true }, "modes": { "grab": { "distance": 400, "line_linked": { "opacity": 1 } }, "bubble": { "distance": 250, "size": 0, "duration": 2, "opacity": 0, "speed": 3 }, "repulse": { "distance": 400, "duration": 0.4 }, "push": { "particles_nb": 4 }, "remove": { "particles_nb": 2 } } }, "retina_detect": true }
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