html - 在 3D 空间中垂直于父 div 旋转子 div

Question

html {
  font-size: 0.7rem;
}
div div {
  top: 5rem;
  background-color: #444;
  transform-origin: top center;
}

.rotate_x {
  animation-name: rotate_x;
}
@keyframes rotate_x {
  0% {
    transform: rotateX( 0deg );
  }
  100% {
    transform: rotateX( 360deg );
  }
}

.rotate_y {
  animation-name: rotate_y;
}
@keyframes rotate_y {
  0% {
    transform: rotateY( 0deg );
  }
  100% {
    transform: rotateY( 180deg );
  }
}

<style>
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    animation-duration: 5s;
    animation-iteration-count: infinite;
    animation-timing-function: linear;
  }
  html, body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    width: 100%;
  }
  body {
    perspective: 5rem;
  }
  div {
    position: relative;
    top: -1.5rem;
    width: 5rem;
    height: 5rem;
    background-color: #222;
    border-radius: 0.5rem;
  }
</style>

<div class='rotate_y'>
  <div class='rotate_x'>
  </div>
</div>

灰底 div似乎没有垂直于黑色顶部旋转出去 div如预期。相反，底部灰色 div 似乎缩小，直到它具有负值并被反转。所需的结果是底部灰色 div像在铰链上一样向上旋转；在 3D 空间中制作“L”形
在它一直向上并翻转以在另一侧做同样的事情之前。随着父 div 旋转 360 度。
我怎样才能做底部 div创建一个“L”形，因为它与它的父 div 连接？

Answer 1

您需要设置transform-style并使视 Angular 更大一点:

html {
  font-size: 0.7rem;
}
div div {
  top: 5rem;
  background-color: #444;
  transform-origin: top center;
}

.rotate_x {
  animation-name: rotate_x;
}
@keyframes rotate_x {
  0% {
    transform: rotateX( 0deg );
  }
  100% {
    transform: rotateX( 360deg );
  }
}

.rotate_y {
  animation-name: rotate_y;
  transform-style:preserve-3d; /* HERE */
}
@keyframes rotate_y {
  0% {
    transform: rotateY( 0deg );
  }
  100% {
    transform: rotateY( 180deg );
  }
}

<style>
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    animation-duration: 5s;
    animation-iteration-count: infinite;
    animation-timing-function: linear;
  }
  html, body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    width: 100%;
  }
  body {
    perspective: 15rem;
  }
  div {
    position: relative;
    top: -1.5rem;
    width: 5rem;
    height: 5rem;
    background-color: #222;
    border-radius: 0.5rem;
  }
</style>

<div class='rotate_y'>
  <div class='rotate_x'>
  </div>
</div>