CSS只有3D旋转文字

Question

我有一个带有文字旋转的div.如何获得文本深度以提供更好的3D效果？为了澄清,在90deg文本变得1px厚实,因为我们只能从侧面看到它 - 我如何制作它,例如,10px厚？此外,应显示适当的深度 - 即0deg我们看不到深度; 在45deg我们看到5px的深度; 在90deg我们看到完整的10px深度; 等等

我是一个CSS唯一的解决方案.

#spinner {
  animation-name: spinner;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  animation-duration: 3s;
  transform-style: preserve-3d;
  text-align:center;
}
@keyframes spinner {
  from {
    transform: rotateY(0deg);
  }
  to {
    transform: rotateY(-360deg);
  }
}

<p id="spinner">Stop, I'm getting dizzy!</p>

Answer 1

简单text-shadow可以做到这一点:

body {
  perspective: 500px;
}
#spinner {
  text-align: center;
  animation-name: spin, depth;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  animation-duration: 3s;
}
@keyframes spin {
  from { transform: rotateY(0deg); }
  to { transform: rotateY(-360deg); }
}
@keyframes depth {
  0% { text-shadow: 0 0 black; }
  25% { text-shadow: 1px 0 black, 2px 0 black, 3px 0 black, 4px 0 black, 5px 0 black; }
  50% { text-shadow: 0 0 black; }
  75% { text-shadow: -1px 0 black, -2px 0 black, -3px 0 black, -4px 0 black, -5px 0 black; }
  100% { text-shadow: 0 0 black; }
}

<p id="spinner">Stop, I'm getting dizzy!</p>

另一个改进可能是使用::before和::after伪类克隆文本:

body {
  perspective: 1000px;
}
#spinner {
  font-size: 50px;
  text-align: center;
  animation-name: spin, depth;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  animation-duration: 3s;
  transform-style: preserve-3d;
  position: relative;
}
#spinner::before,
#spinner::after {
  content: "Stop, I'm getting dizzy!";
  display: block;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  transform: rotateY(0.5deg);
  transform-origin: 0 50%;
}
#spinner::after {
  transform: rotateY(-0.5deg);
  transform-origin: 100% 50%;
}
@keyframes spin {
  from { transform: rotateY(0deg); }
  to { transform: rotateY(-360deg); }
}
@keyframes depth {
  0% { text-shadow: 0 0 black; }
  25% { text-shadow: 1px 0 black, 2px 0 black, 3px 0 black, 4px 0 black, 5px 0 black, 6px 0 black; }
  50% { text-shadow: 0 0 black; }
  75% { text-shadow: -1px 0 black, -2px 0 black, -3px 0 black, -4px 0 black, -5px 0 black, -6px 0 black; }
  100% { text-shadow: 0 0 black; }
}

<p id="spinner">Stop, I'm getting dizzy!</p>

Answer 2

纯CSS解决方案看起来不太好.要获得真正的3D效果,请使用JS.我建议使用three.js,因为它包含一个相当容易使用的textGeometry功能.

我编写了一个脚本,用类替换元素的内容和rotatingTextwebGL场景,其中元素内的文本正在旋转.

你当然可以使用three.js做各种很酷的效果,以使你的文字看起来更好.有关文本格式,请参见textGeometry doc.查看three.js文档以获取更多详细信息.

我在代码的注释中添加了一些注释.

.rotatingText {
  width: 100%;
  height: 200px;
}

<!--your rotating text, just give it class rotatingText-->
<div class="rotatingText">Stop, I'm getting dizzy!</div>


<!--three.js library-->
<script src="https://ajax.googleapis.com/ajax/libs/threejs/r69/three.min.js"></script>
<!--the default font for three.js-->
<script src="http://threejs.org/examples/fonts/helvetiker_regular.typeface.js"></script>
<!--the script that converts each .rotatingText element into 3D -->
<script>
  function rotateText(container,i){
    var t = THREE;
    var containerW = container.offsetWidth;
    var containerH = container.offsetHeight;
    var theText = container.innerHTML; //grab the text from the element...
    container.innerHTML = ""; // ...and clear it
    var renderer = new t.WebGLRenderer({
      alpha: true,
      antialiasing: true
    });
    renderer.setSize(containerW, containerH);
    renderer.setClearColor(0x000000, 0);
    container.appendChild(renderer.domElement);
    var scene = new t.Scene();
    var camera = new t.PerspectiveCamera(
      75, //vertical field of view
      containerW / containerH, //aspect ratio
      0.1, //near plane
      1000 //far plane
    );
    scene.add(camera);
    camera.position.set(0, 0, 100);
    // This is your 3D text:
    var geometry = new t.TextGeometry(theText, { //insert the text we grabbed earlier here
      size: 10, //your font size
      height: 1 //your font depth
    });
    var material = new t.MeshLambertMaterial({
      color: 0x000000 //your font color
    });
    var text = new t.Mesh(geometry, material); //this is your 3D text object
    //I created a pivot object to act as the center point for rotation:
    geometry.computeBoundingBox();
    var textWidth = geometry.boundingBox.max.x - geometry.boundingBox.min.x;
    text.position.set(-0.5 * textWidth, 0, 0);
    scene.add(text);
    var pivot = new t.Object3D();
    pivot.add(text);
    scene.add(pivot);
    //Then just render your scene and request for new frames
    this.render = function() {
      pivot.rotation.y += .02; //how much you want your text to rotate per frame
      requestAnimationFrame(render);
      renderer.render(scene, camera);
    }
    render();
  }

  var rotatingTextElements = document.getElementsByClassName("rotatingText");
  for (var i = 0; i < rotatingTextElements.length; i++) {
    rotateText(rotatingTextElements[i]);
  }
</script>