Question

我在鼠标移动后处理3D bloc。我正在更新CSS值以创建3D效果。基地看起来像：

＆＃13;

document.addEventListener('DOMContentLoaded', function() {
  let mouseMove = function (e) {
    let el = e.currentTarget;
    let delta_x = parseFloat(e.offsetX / el.offsetWidth).toFixed(3)
    let delta_y = parseFloat(e.offsetY / el.offsetHeight).toFixed(3)

    var transform = "rotateY(" + ((delta_x - 0.5) * 50) + "deg) " +
        "rotateX(" + (-(delta_y - 0.5) * 50) + "deg)"
    var boxShadow = parseInt(-(delta_x - 0.5) * 8) +"px " + 
        parseInt(-((delta_y - 0.5) * 8) + 2) + 
        "px 4px rgba(34, 25, 25, 0.4);"

    el.setAttribute('style', 
                    "transform: " + transform + "; " + 
                    "box-shadow: " + boxShadow);
  }

  let els = document.getElementsByClassName("el")
  let len = els.length
  for(let i=0; i<len; i++) {
    let el = els[i]
    el.addEventListener("mousemove", mouseMove)
  }
}, false);

＆＃13;

html, body, #wrapper { 
  height: 100%; 
  margin: 0; 
  padding: 0; 
}
#wrapper {
  background: #a4d24b;
  /*font-family: 'Open Sans', sans-serif; */
  font-weight: 400;
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  perspective: 500px;
}
.container {
  position: relative;
  margin: auto;
  width: 20%;
  height: 40%;
  transition: all .25s;
  transform-origin: 50% 50%;
}
.container:hover {
  transform: translateZ(25px);
}
.el {
  height: 100%;
  background: #FFF; color: #000;
  box-shadow: 0 2px 4px rgba(34, 25, 25, 0.4);
}
.el:not(:hover) {
  transform: rotateY(0deg) rotateX(0deg) !important;
  box-shadow: 0 2px 4px rgba(34, 25, 25, 0.4) !important;
}

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<div id="wrapper">
  <div class="container">
    <div class="el"></div>
  </div>
</div>

＆＃13;

JS概念很简单：当鼠标在集团上移动时，我得到鼠标在 x 和 y

对于 x （0 - ＆gt; 1），我将transform属性从rotate: rotateY(-12deg)移至rotate: rotateY(12deg)

y （0 - ＆gt; 1）从rotate: rotateX(-12deg)到rotate: rotateX(12deg)
的情况相同
我还移动了盒子阴影（带有x和y）来帮助实现可视化。

结果看起来不错，但是如果我在这个bloc中添加一个背景，结果看起来很奇怪。

（与背景相同的代码）

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document.addEventListener('DOMContentLoaded', function() { let mouseMove = function (e) { let el = e.currentTarget; let delta_x = parseFloat(e.offsetX / el.offsetWidth).toFixed(3) let delta_y = parseFloat(e.offsetY / el.offsetHeight).toFixed(3) var transform = "rotateY(" + ((delta_x - 0.5) * 50) + "deg) " + "rotateX(" + (-(delta_y - 0.5) * 50) + "deg)" var boxShadow = parseInt(-(delta_x - 0.5) * 8) +"px " + parseInt(-((delta_y - 0.5) * 8) + 2) + "px 4px rgba(34, 25, 25, 0.4);" el.setAttribute('style', "transform: " + transform + "; " + "box-shadow: " + boxShadow); } let els = document.getElementsByClassName("el") let len = els.length for(let i=0; i<len; i++) { let el = els[i] el.addEventListener("mousemove", mouseMove) } }, false);
＆＃13;
html, body, #wrapper { height: 100%; margin: 0; padding: 0; } #wrapper { background: #a4d24b; /*font-family: 'Open Sans', sans-serif; */ font-weight: 400; font-size: 14px; display: flex; flex-wrap: wrap; perspective: 500px; } .container { position: relative; margin: auto; width: 20%; height: 40%; transition: all .25s; transform-origin: 50% 50%; } .container:hover { transform: translateZ(25px); } .el { height: 100%; background: #FFF url(https://images-na.ssl-images-amazon.com/images/M/MV5BMjQyODg5Njc4N15BMl5BanBnXkFtZTgwMzExMjE3NzE@._V1_SY1000_SX686_AL_.jpg); background-size: cover; background-position: 50% 50%; color: #000; box-shadow: 0 2px 4px rgba(34, 25, 25, 0.4); } .el:not(:hover) { transform: rotateY(0deg) rotateX(0deg) !important; box-shadow: 0 2px 4px rgba(34, 25, 25, 0.4) !important; }
＆＃13;
<div id="wrapper"> <div class="container"> <div class="el"></div> </div> </div>
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现在，它看起来只有顶部工作，而底部并没有向好的方向发展。（当鼠标从左上角移动到右下角时，最佳再现。）

我犯了错误吗？或者它是一个透视问题？

更新有些浏览器并不喜欢CSS，如果白色框在你移动鼠标时没有移动，只需删除它即可。

.el:not(:hover) { transform: rotateY(0deg) rotateX(0deg) !important; box-shadow: 0 2px 4px rgba(34, 25, 25, 0.4) !important; }

Answer 1

您需要在已转换元素的直接父级上应用透视。

我解决了使用perspective：inherit

＆＃13;

document.addEventListener('DOMContentLoaded', function() {
  let mouseMove = function (e) {
    let el = e.currentTarget;
    let delta_x = parseFloat(e.offsetX / el.offsetWidth).toFixed(3)
    let delta_y = parseFloat(e.offsetY / el.offsetHeight).toFixed(3)

    var transform = "rotateY(" + ((delta_x - 0.5) * 50) + "deg) " +
        "rotateX(" + (-(delta_y - 0.5) * 50) + "deg)"
    var boxShadow = parseInt(-(delta_x - 0.5) * 8) +"px " + 
        parseInt(-((delta_y - 0.5) * 8) + 2) + 
        "px 4px rgba(34, 25, 25, 0.4);"

    el.setAttribute('style', 
                    "transform: " + transform + "; " + 
                    "box-shadow: " + boxShadow);
  }

  let els = document.getElementsByClassName("el")
  let len = els.length
  for(let i=0; i<len; i++) {
    let el = els[i]
    el.addEventListener("mousemove", mouseMove)
  }
}, false);

＆＃13;

html, body, #wrapper { 
  height: 100%; 
  margin: 0; 
  padding: 0; 
}
#wrapper {
  background: #a4d24b;
  /*font-family: 'Open Sans', sans-serif; */
  font-weight: 400;
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  perspective: 500px;
}
.container {
  position: relative;
  margin: auto;
  width: 20%;
  height: 40%;
  transition: all .25s;
  transform-origin: 50% 50%;
  perspective: inherit;
}
.container:hover {
  transform: translateZ(25px);
}
.el {
  height: 100%;
  background: #FFF url(https://images-na.ssl-images-amazon.com/images/M/MV5BMjQyODg5Njc4N15BMl5BanBnXkFtZTgwMzExMjE3NzE@._V1_SY1000_SX686_AL_.jpg);
  background-size: cover;
  background-position: 50% 50%; 
  color: #000;
  box-shadow: 0 2px 4px rgba(34, 25, 25, 0.4);
}
.el:not(:hover) {
  transform: rotateY(0deg) rotateX(0deg) !important;
  box-shadow: 0 2px 4px rgba(34, 25, 25, 0.4) !important;
}

＆＃13;

<div id="wrapper">
  <div class="container">
    <div class="el"></div>
  </div>
</div>

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CSS3 3D旋转：透视如何工作？

1 个答案: