问题描述
我想弄清楚是否有任何方法可以使用 3D CSS 变换/平移或动画使其看起来像打开和关闭翅膀,但不必将图像分成几部分(它可以是一个div 的背景图片,如果有帮助的话)。
解决方法
是的,使用应用于两个元素的背景,其中每个元素只显示一半,然后您只需在 Y 轴上旋转它们。
.box {
width:300px;
margin:20px;
display:flex;
perspective:500px;
}
.box::before,.box::after{
content:"";
padding-top:56%; /* ratio based on your image */
flex:1; /* half the main element size */
background-image:url(https://i.imgur.com/DgMoHC5.jpg);
background-size:200% 100%; /* twice bigger than the pseudo element to get half the image*/
animation:left 1s linear infinite alternate;
transform-origin:right;
}
.box::after {
background-position:right; /* get the right part of the image */
animation-name:right;
transform-origin:left;
}
@keyframes left{
to {transform:rotateY(60deg)}
}
@keyframes right{
to {transform:rotateY(-60deg)}
}
<div class="box"></div>
带有一些翻译的更逼真的动画:
.box {
width: 300px;
margin: 20px;
display: flex;
perspective: 500px;
}
.box::before,.box::after {
content: "";
padding-top: 56%;
flex: 1;
background-image: url(https://i.imgur.com/DgMoHC5.jpg);
background-size: 200% 100%;
animation: left 0.5s linear infinite alternate;
transform-origin: right;
}
.box::after {
background-position: right;
animation-name: right;
transform-origin: left;
}
@keyframes left {
from {
transform: translateZ(80px) rotateY(-30deg)
}
to {
transform:translateZ(0px) rotateY(50deg)
}
}
@keyframes right {
from {
transform: translateZ(80px) rotateY(30deg)
}
to {
transform:translateZ(0px) rotateY(-50deg)
}
}
<div class="box"></div>