效果预览
在线演示
按下右侧的“点击预览”按钮可以在当前页面预览,点击链接可以全屏预览。
https://codepen.io/comehope/pen/RyvgMZ
可交互视频教程
此视频是可以交互的,你可以随时暂停视频,编辑视频中的代码。
请用 chrome, safari, edge 打开观看。
https://scrimba.com/c/czPkasr
源代码下载
本地下载
每日前端实战系列的全部源代码请从 github 下载:
https://github.com/comehope/front-end-daily-challenges
代码解读
定义 dom,一个容器中包含 3 个 <span>:
<div class="penrose"> ???<span></span> ???<span></span> ???<span></span></div>
居中显示:
html,body { ???height: 100%; ???display: flex; ???align-items: center; ???justify-content: center; ???background-color: black;}
定义容器尺寸:
.penrose { ???width: 20em; ???height: 20em;}
画出包含 3 条边的容器:
.penrose { ???position: relative;}.penrose span { ???position: absolute; ???width: 100%; ???height: 100%;}.penrose span:nth-child(1) { ???transform: rotate(0deg);}.penrose span:nth-child(2) { ???transform: rotate(120deg);}.penrose span:nth-child(3) { ???transform: rotate(240deg);}
为 3 条边所属的容器上色:
.penrose { ???color: red;}.penrose span { ???background-color: currentColor;}.penrose span:nth-child(1) { ???filter: brightness(1);}.penrose span:nth-child(2) { ???filter: brightness(0.66);}.penrose span:nth-child(3) { ???filter: brightness(0.33);}
用遮罩切出每一条边,组成彭罗斯三角形:
.penrose span { ???clip-path: polygon(57% 0, 75% 0, 26% 85%, 89.5% 85%, 98.4% 100%, 0 100%);}.penrose span:nth-child(2) { ???top: 18.3%; ???left: 43.3%;}.penrose span:nth-child(3) { ???top: 46.5%; ???left: 5.9%;}
定义旋转动画效果:
.penrose { ???animation: rotating 30s linear infinite; ???transform-origin: 66% 66%;}@keyframes rotating { ???0% { ???????transform: rotate(0deg); ???} ???100% { ???????transform: rotate(360deg); ???}}
最后,增加旋转时变色的效果:
@keyframes rotating { ???0% { ???????color: red; ???????transform: rotate(0deg); ???} ???20% { ???????color: yellow; ???} ???40% { ???????color: lime; ???} ???60% { ???????color: blue; ???} ???80% { ???????color: fuchsia; ???} ???100% { ???????color: red; ???????transform: rotate(720deg); ???}}
大功告成!
原文地址:https://segmentfault.com/a/1190000014946883
如何用纯 CSS 绘制一个世界上不存在的彭罗斯三角形
原文地址:https://www.cnblogs.com/datiangou/p/9994285.html