绚丽的3D星空动画效果(纯CSS)
(3D星空动画可以用作网页背景，Gary为文本文字)
<!doctype html><html lang="zh"><head> ???<meta charset="UTF-8"> ???<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> ????<meta name="viewport" content="width=device-width, initial-scale=1.0"> ???<title>jQuery和CSS3超绚丽的3D星空动画特效</title> ???<script src="http://www.jq22.com/jquery/jquery-1.10.2.js"></script> ???<script src=‘js/prefixfree.min.js‘></script> ???<style class="cp-pen-styles"> ???????p { ?????????position: fixed; ?????????top: 50%; ?????????left: 0; ?????????right: 0; ?????????text-align: center; ?????????transform: translateY(-50%); ?????????font-size: 40px; ?????????font-weight: 900; ?????????color: white; ?????????text-shadow: 0 0 50px black; ?????????text-transform: capitalize; ?????????font-family: ‘Roboto‘,‘Helvetica‘,‘Arial‘,sans-serif; ?????????letter-spacing: 5px; ???} ???????body { ?????background: radial-gradient(200% 100% at bottom center, #0070aa, #0b2570, #000035, #000); ?????background: radial-gradient(220% 105% at top center, #000 10%, #000035 40%, #0b2570 65%, #0070aa); ?????background-attachment: fixed; ?????overflow: hidden; ???} ???????????@keyframes rotate { ?????0% { ???????transform: perspective(400px) rotateZ(20deg) rotateX(-40deg) rotateY(0); ?????} ?????100% { ???????transform: perspective(400px) rotateZ(20deg) rotateX(-40deg) rotateY(-360deg); ?????} ???} ???.stars { ?????transform: perspective(500px); ?????transform-style: preserve-3d; ?????position: absolute; ?????bottom: 0; ?????perspective-origin: 50% 100%; ?????left: 50%; ?????animation: rotate 90s infinite linear; ???} ???.star { ?????width: 2px; ?????height: 2px; ?????background: #F7F7B6; ?????position: absolute; ?????top: 0; ?????left: 0; ?????transform-origin: 0 0 -300px; ?????transform: translate3d(0, 0, -300px); ?????backface-visibility: hidden; ???} ???</style></head><body> ???????<p>Gary</p> ???<div class="stars"> ?????????????</div> ???<script src=‘js/stopExecutionOnTimeout.js‘></script> ???????<script> ???$(document).ready(function () { ???????var stars = 800; ???????var $stars = $(‘.stars‘); ???????var r = 800; ???????for (var i = 0; i < stars; i++) { ???????????if (window.CP.shouldStopExecution(1)) { ???????????????break; ???????????} ???????????var $star = $(‘<div/>‘).addClass(‘star‘); ???????????$stars.append($star); ???????} ???????window.CP.exitedLoop(1); ???????$(‘.star‘).each(function () { ???????????var cur = $(this); ???????????var s = 0.2 + Math.random() * 1; ???????????var curR = r + Math.random() * 300; ???????????cur.css({ ???????????????transformOrigin: ‘0 0 ‘ + curR + ‘px‘, ???????????????transform: ‘ translate3d(0,0,-‘ + curR + ‘px) rotateY(‘ + Math.random() * 360 + ‘deg) rotateX(‘ + Math.random() * -50 + ‘deg) scale(‘ + s + ‘,‘ + s + ‘)‘ ???????????}); ???????}); ???}); ???</script></body></html>(使用了三个框架)
jquery.min
prefixfree.min
stopExecutionOnTimeout
实现过程
CSS
星空渐变背景
???body { ?????background: radial-gradient(200% 100% at bottom center, #0070aa, #0b2570, #000035, #000); ?????background: radial-gradient(220% 105% at top center, #000 10%, #000035 40%, #0b2570 65%, #0070aa); ?????background-attachment: fixed; ?????overflow: hidden; ???}background：设置星空夜晚渐变效果(也不知道他们是怎么测试出来的)
background-attachment :指定一个固定的背景图像
fixed 背景图像是固定的
星空(一颗)
???.star { ?????width: 2px; ?????height: 2px; ?????background: #F7F7B6; ?????position: absolute; ?????top: 0; ?????left: 0; ?????transform-origin: 0 0 -300px; ?????transform: translate3d(0, 0, -300px); ?????backface-visibility: hidden; ???}transform-origin:设置旋转元素的基点位置 传送门
x-axis:定义视图被置于 X 轴的何处
y-axis:定义视图被置于 Y 轴的何处
z-axis:定义视图被置于 Z 轴的何处
backface-visibility：隐藏被旋转的 div 元素的背面(影藏星星在星空下)
动态星空(多颗)
???.stars { ?????transform: perspective(500px); ?????transform-style: preserve-3d; ?????position: absolute; ?????bottom: 0; ?????perspective-origin: 50% 100%; ?????left: 50%; ?????animation: rotate 90s infinite linear; ???}perspective 定义 3D 元素距视图的距离(星星在星空中的距离)
制作星空动画
???@keyframes rotate { ?????0% { ???????transform: perspective(400px) rotateZ(20deg) rotateX(-40deg) rotateY(0); ?????} ?????100% { ???????transform: perspective(400px) rotateZ(20deg) rotateX(-40deg) rotateY(-360deg); ?????} ???}perspective()：为 星星转换元素定义透视视图
rotateZ() ：定义星星沿着 Z 轴的 3D 旋转 20deg
rotateX()： 定义星星沿着 X 轴的 3D 旋转 -40deg
rotateY()： 定义星星沿着 Y 轴的 3D 旋转
DOM
???<script> ???????$(document).ready(function () { ???????var stars = 800; ???????var $stars = $(‘.stars‘); ???????var r = 800; ???????for (var i = 0; i < stars; i++) { ???????????if (window.CP.shouldStopExecution(1)) { ???????????????break; ???????????} ???????????var $star = $(‘<div/>‘).addClass(‘star‘); ???????????$stars.append($star); ???????} ???????????????window.CP.exitedLoop(1); ???????$(‘.star‘).each(function () { ???????????var cur = $(this); ???????????var s = 0.2 + Math.random() * 1; ???????????var curR = r + Math.random() * 300; ???????????cur.css({ ???????????????transformOrigin: ‘0 0 ‘ + curR + ‘px‘, ???????????????transform: ‘ translate3d(0,0,-‘ + curR + ‘px) rotateY(‘ + Math.random() * 360 + ‘deg) rotateX(‘ + Math.random() * -50 + ‘deg) scale(‘ + s + ‘,‘ + s + ‘)‘ ???????????}); ???????}); ???}); ???</script>当 DOM（文档对象模型） 已经加载，并且页面（包括图像）已经完全呈现时，会发生 ready 事件
星星遍布夜空
addClass() ：向被选元素添加一个或多个类名
append() ：用于在列表末尾添加新的对象
transform-origin ：设置旋转元素的基点位置
???????????????transformOrigin: ‘0 0 ‘ + curR + ‘px‘, ???????????????transform: ‘ translate3d(0,0,-‘ + curR + ‘px) rotateY(‘ + Math.random() * 360 + ‘deg) rotateX(‘ + Math.random() * -50 + ‘deg) scale(‘ + s + ‘,‘ + s + ‘)‘
transformOrigin：星空每次都绕着字体中间旋转
transform:随机出现新的星星
暂时不知道
window.CP.shouldStopExecution(1)
window.CP.exitedLoop(1)
有什么用。。。
O(∩_∩)O留着
JS框架_(JQuery.js)绚丽的3D星空动画
原文地址：https://www.cnblogs.com/1138720556Gary/p/9416956.html