Take you to play with 3D of CSS3!
Without further ado, let’s start with the demo
Cool css3 revolving lantern/cube animation: https://bupt-hjm.github.io/css3-3d/
Github source code address: https://github.com/BUPT-HJM/css3-3d
Cool css3 page flip animation: https://bupt-hjm.github.io/css3-flip-book/
Github source code address: https://github.com/BUPT-HJM/css3-flip-book
The above are all implemented in pure css3 without using any js code. I hope you can get your star~
Getting started with 3D with css3
To play with 3D in CSS3, you must understand a few words, namely perspective, rotate and translate. Perspective means looking at 2D things on the screen from a realistic perspective to show the 3D effect. Rotation is no longer a rotation on a 2D plane, but a rotation of a three-dimensional coordinate system, including rotation on the X-axis, Y-axis, and Z-axis. The same goes for panning.
Of course, I’ll explain it theoretically, but I guess you still don’t understand it. Below are 3 gifs:
Rotate along the X-axis
Rotate along the Y axis
Rotate along the Z axis
Rotation should be no problem, then it will be easier to understand translation, which means moving on the X-axis, Y-axis, and Z-axis.
You may say that perspective is difficult to understand. Let me introduce several properties of perspective.
perspective
The English name of perspective is perspective. Without this thing, there is no way to create a 3D effect. But how does this thing allow our browser to create a 3D effect? You can look at the picture below. In fact, those who have studied painting should know the perspective relationship, and This is the truth here.
But in CSS, it has a numerical value. For example, what does perspective: 1000px mean? We can understand it this way. If we look directly at an object, the object will be super large and occupy our line of sight. As we get farther and farther away from it, it will become smaller and the three-dimensional feeling will come out, right? In fact, this numerical structure By determining the distance between our eyes and the screen, a virtual 3D illusion is constructed.
perspective-origin
From the above we understand perspective, and add what this origin is. What we mentioned earlier is the distance between the eye and the object, and this is the line of sight of the eye. The different positions of our viewpoints determine the different scenes we see. , the default is the center, is perspective-origin: 50% 50%, the first value is the X-axis on which the 3D element is based, and the second one is defined as the position on the y-axis
When you define the perspective-origin attribute for an element, its child elements will get the perspective effect, not the element itself. Must be used with the perspective attribute, and only affects 3D transform elements. (W3school)
transform-style
Perspective is here again, yes, it is the key to 3D in CSS. The default transform-style is flat. If you want to have a 3D effect on the element, you must use transform-style: preserve-3d, otherwise it will just be flat. Transformation, not 3D transformation
Take you step by step to play with css3-3d
Above we have a little understanding of the concept, let’s start the actual practice!
Let’s take a look at an effect, isn’t it cool~
If the image cannot be loaded, just visit https://bupt-hjm.github.io/css3-3d/. If you think it is possible, remember to star it hh
The first step: html structure
A very simple container wrapped in a piece-box containing 6 pieces
<p class="container">
<p class="piece-box">
<p class="piece piece-1"></p>
<p class="piece piece-2"></p>
<p class="piece piece-3"></p>
<p class="piece piece-4"></p>
<p class="piece piece-5"></p>
<p class="piece piece-6"></p>
</p>
</p>Step 2: Add necessary 3D attributes and enter the 3D world
Through the above explanation, you should be familiar with perspective,
/*容器*/
.container {
-webkit-perspective: 1000px;
-moz-perspective: 1000px;
-ms-perspective: 1000px;
perspective: 1000px;
}
/*piece盒子*/
.piece-box {
perspective-origin: 50% 50%;
-webkit-transform-style: preserve-3d;
-moz-transform-style: preserve-3d;
-ms-transform-style: preserve-3d;
transform-style: preserve-3d;
}Step 3: Add necessary styles
/*容器*/
.container {
-webkit-perspective: 1000px;
-moz-perspective: 1000px;
-ms-perspective: 1000px;
perspective: 1000px;
}
/*piece盒子*/
.piece-box {
position: relative;
width: 200px;
height: 200px;
margin: 300px auto;
perspective-origin: 50% 50%;
-webkit-transform-style: preserve-3d;
-moz-transform-style: preserve-3d;
-ms-transform-style: preserve-3d;
transform-style: preserve-3d;
}
/*piece通用样式*/
.piece {
position: absolute;
width: 200px;
height: 200px;
background: red;
opacity: 0.5;
}
.piece-1 {
background: #FF6666;
}
.piece-2 {
background: #FFFF00;
}
.piece-3 {
background: #006699;
}
.piece-4 {
background: #009999;
}
.piece-5 {
background: #FF0033;
}
.piece-6 {
background: #FF6600;
}Of course, after you complete this step, you will still only see one square, which is our piece-6, because our 3Dtransform has not started yet
Step 4: 3D transformation is coming
The first thing is to realize the revolving lantern. Let’s not let it go first. Let’s realize the light part first.
如何实现呢？因为要构成一个圆，圆是360度，而我们有6个piece，那么，很容易想到，我们需要把每一个piece以递增60度的方式rotateY，就变成如下
如何把他们从中心拉开呢？
这里我们还要注意一点，在我们使元素绕Y轴旋转以后，其实X轴和Z轴也会跟着旋转，所所以正方体的每个面的垂直线还是Z轴，我们就只需要改变下translateZ的值,而当translateZ为正的时候，就朝着我们的方向走来，这样就可以拉开了
但是拉开的距离如何衡量？
是不是一目了然了~
下面我们再修改下css
.piece-1 {
background: #FF6666;
-webkit-transform: rotateY(0deg) translateZ(173.2px);
-ms-transform: rotateY(0deg) translateZ(173.2px);
-o-transform: rotateY(0deg) translateZ(173.2px);
transform: rotateY(0deg) translateZ(173.2px);
}
.piece-2 {
background: #FFFF00;
-webkit-transform: rotateY(60deg) translateZ(173.2px);
-ms-transform: rotateY(60deg) translateZ(173.2px);
-o-transform: rotateY(60deg) translateZ(173.2px);
transform: rotateY(60deg) translateZ(173.2px);
}
.piece-3 {
background: #006699;
-webkit-transform: rotateY(120deg) translateZ(173.2px);
-ms-transform: rotateY(120deg) translateZ(173.2px);
-o-transform: rotateY(120deg) translateZ(173.2px);
transform: rotateY(120deg) translateZ(173.2px);
}
.piece-4 {
background: #009999;
-webkit-transform: rotateY(180deg) translateZ(173.2px);
-ms-transform: rotateY(180deg) translateZ(173.2px);
-o-transform: rotateY(180deg) translateZ(173.2px);
transform: rotateY(180deg) translateZ(173.2px);
}
.piece-5 {
background: #FF0033;
-webkit-transform: rotateY(240deg) translateZ(173.2px);
-ms-transform: rotateY(240deg) translateZ(173.2px);
-o-transform: rotateY(240deg) translateZ(173.2px);
transform: rotateY(240deg) translateZ(173.2px);
}
.piece-6 {
background: #FF6600;
-webkit-transform: rotateY(300deg) translateZ(173.2px);
-ms-transform: rotateY(300deg) translateZ(173.2px);
-o-transform: rotateY(300deg) translateZ(173.2px);
transform: rotateY(300deg) translateZ(173.2px);
}是不是已经实现了走马灯了？
第五步：animation让3D动起来
要实现走马灯动，其实很简单，我们只要在piece-box上加上旋转动画就行了,5s完成动画，从0度旋转到360度
/*piece盒子*/
.piece-box {
position: relative;
width: 200px;
height: 200px;
margin: 300px auto;
perspective-origin: 50% 50%;
-webkit-transform-style: preserve-3d;
-moz-transform-style: preserve-3d;
-ms-transform-style: preserve-3d;
transform-style: preserve-3d;
animation: pieceRotate 5s;
-moz-animation: pieceRotate 5s; /* Firefox */
-webkit-animation: pieceRotate 5s; /* Safari and Chrome */
-o-animation: pieceRotate 5s ; /* Opera */
}
/*走马灯动画*/
@keyframes pieceRotate
{
0% {-webkit-transform: rotateY(0deg);
-ms-transform: rotateY(0deg);
-o-transform: rotateY(0deg);
transform: rotateY(0deg);}
100% {-webkit-transform: rotateY(360deg);
-ms-transform: rotateY(360deg);
-o-transform: rotateY(360deg);
transform: rotateY(360deg);}
}
/* Firefox */
@-moz-keyframes pieceRotate
{
0% {-webkit-transform: rotateY(0deg);
-ms-transform: rotateY(0deg);
-o-transform: rotateY(0deg);
transform: rotateY(0deg);}
100% {-webkit-transform: rotateY(360deg);
-ms-transform: rotateY(360deg);
-o-transform: rotateY(360deg);
transform: rotateY(360deg);}
}
/* Safari and Chrome */
@-webkit-keyframes pieceRotate
{
0% {-webkit-transform: rotateY(0deg);
-ms-transform: rotateY(0deg);
-o-transform: rotateY(0deg);
transform: rotateY(0deg);}
100% {-webkit-transform: rotateY(360deg);
-ms-transform: rotateY(360deg);
-o-transform: rotateY(360deg);
transform: rotateY(360deg);}
}
/* Opera */
@-o-keyframes pieceRotate
{
0% {-webkit-transform: rotateY(0deg);
-ms-transform: rotateY(0deg);
-o-transform: rotateY(0deg);
transform: rotateY(0deg);}
100% {-webkit-transform: rotateY(360deg);
-ms-transform: rotateY(360deg);
-o-transform: rotateY(360deg);
transform: rotateY(360deg);}
}这里就不放gif了~hhh是不是实现了酷炫的效果，还没结束哦~更酷炫的正方体组装
正方体，其实也不难实现，我这里就不很详细说了，你首先可以想象一个面，然后去拓展其他面如何去实现，比如我们把正方体的前面translateZ(100px）让它靠近我们100px,然后后面translateZ(-100px）让它远离我们100px,左边是先translateX(-100px再rotateY(90deg),右边就是translateX(100px)再rotateY(90deg),上面是先translateY(-100px)，rotateX(90deg)，下面是先translateY(100px)，rotateX(90deg)，只要我们写进动画，一切就大功告成。
css就为如下，以下就只放piece1，其他读者可以自己类比实现，或者看我github的源码
.piece-1 {
background: #FF6666;
-webkit-transform: rotateY(0deg) translateZ(173.2px);
-ms-transform: rotateY(0deg) translateZ(173.2px);
-o-transform: rotateY(0deg) translateZ(173.2px);
transform: rotateY(0deg) translateZ(173.2px);
animation: piece1Rotate 5s 5s;
-moz-animation: piece1Rotate 5s 5s; /* Firefox */
-webkit-animation: piece1Rotate 5s 5s; /* Safari and Chrome */
-o-animation: piece1Rotate 5s 5s; /* Opera */
-webkit-animation-fill-mode: forwards; /* Chrome, Safari, Opera */
animation-fill-mode: forwards;
}
/*front*/
@keyframes piece1Rotate
{
0% {-webkit-transform: rotateY(0deg) translateZ(173.2px);
-ms-transform: rotateY(0deg) translateZ(173.2px);
-o-transform: rotateY(0deg) translateZ(173.2px);
transform: rotateY(0deg) translateZ(173.2px);}
100% {-webkit-transform: rotateY(0deg) translateZ(100px);
-ms-transform: rotateY(0deg) translateZ(100px);
-o-transform: rotateY(0deg) translateZ(100px);
transform: rotateY(0deg) translateZ(100px);}
}
/* Firefox */
@-moz-keyframes piece1Rotate
{
0% {-webkit-transform: rotateY(0deg) translateZ(173.2px);
-ms-transform: rotateY(0deg) translateZ(173.2px);
-o-transform: rotateY(0deg) translateZ(173.2px);
transform: rotateY(0deg) translateZ(173.2px);}
100% {-webkit-transform: rotateY(0deg) translateZ(100px);
-ms-transform: rotateY(0deg) translateZ(100px);
-o-transform: rotateY(0deg) translateZ(100px);
transform: rotateY(0deg) translateZ(100px);}
}
/* Safari and Chrome */
@-webkit-keyframes piece1Rotate
{
0% {-webkit-transform: rotateY(0deg) translateZ(173.2px);
-ms-transform: rotateY(0deg) translateZ(173.2px);
-o-transform: rotateY(0deg) translateZ(173.2px);
transform: rotateY(0deg) translateZ(173.2px);}
100% {-webkit-transform: rotateY(0deg) translateZ(100px);
-ms-transform: rotateY(0deg) translateZ(100px);
-o-transform: rotateY(0deg) translateZ(100px);
transform: rotateY(0deg) translateZ(100px);}
}
/* Opera */
@-o-keyframes piece1Rotate
{
0% {-webkit-transform: rotateY(0deg) translateZ(173.2px);
-ms-transform: rotateY(0deg) translateZ(173.2px);
-o-transform: rotateY(0deg) translateZ(173.2px);
transform: rotateY(0deg) translateZ(173.2px);}
100% {-webkit-transform: rotateY(0deg) translateZ(100px);
-ms-transform: rotateY(0deg) translateZ(100px);
-o-transform: rotateY(0deg) translateZ(100px);
transform: rotateY(0deg) translateZ(100px);}
}细心的读者可以发现我用了一个animation-fill-mode: forwards;,这个其实就是让这些piece保持动画最后的效果，也就是正方体的效果，读者可以不加试试看，那还是会恢复原样。
最后就是正方体的旋转了，前面我们的容器已经用过animation了,读者可能会想我再加个class放animaiton不就行了，hhh，animaiton会覆盖掉前面的，那前面的走马灯的动画就没了，所以在html结构中，我再加了一个box包裹piece, 如下
<p class="container">
<p class="piece-box">
<p class="piece-box2"><!--新加的容器-->
<p class="piece piece-1"></p>
<p class="piece piece-2"></p>
<p class="piece piece-3"></p>
<p class="piece piece-4"></p>
<p class="piece piece-5"></p>
<p class="piece piece-6"></p>
</p>
</p>
</p>在动画上我们可以控制正方体动画的延时时间，就是等到正方体组装完成后再开始动画
animation: boxRotate 5s 10s infinite;第一个5s是动画时长，第二个10s是延时时间，然后我们让正方体的旋转，绕X轴从0度到360度,绕Y轴也0到Y轴360度。
.piece-box2 {
-webkit-transform-style: preserve-3d;
-moz-transform-style: preserve-3d;
-ms-transform-style: preserve-3d;
transform-style: preserve-3d;
animation: boxRotate 5s 10s infinite;
-moz-animation: boxRotate 5s 10s infinite; /* Firefox */
-webkit-animation: boxRotate 5s 10s infinite; /* Safari and Chrome */
-o-animation: boxRotate 5s 10s infinite; /* Opera */
}
/*正方体旋转动画*/
@keyframes boxRotate
{
0% {-webkit-transform: rotateX(0deg) rotateY(0deg););
-ms-transform: rotateX(0deg) rotateY(0deg););
-o-transform: rotateX(0deg) rotateY(0deg););
transform: rotateX(0deg) rotateY(0deg););}
100% {-webkit-transform: rotateX(360deg) rotateY(360deg);
-ms-transform: rotateX(360deg) rotateY(360deg);
-o-transform: rotateX(360deg) rotateY(360deg);
transform: rotateX(360deg) rotateY(360deg);}
}
/* Firefox */
@-moz-keyframes boxRotate
{
0% {-webkit-transform: rotateX(0deg) rotateY(0deg););
-ms-transform: rotateX(0deg) rotateY(0deg););
-o-transform: rotateX(0deg) rotateY(0deg););
transform: rotateX(0deg) rotateY(0deg););}
100% {-webkit-transform: rotateX(360deg) rotateY(360deg);
-ms-transform: rotateX(360deg) rotateY(360deg);
-o-transform: rotateX(360deg) rotateY(360deg);
transform: rotateX(360deg) rotateY(360deg);}
}
/* Safari and Chrome */
@-webkit-keyframes boxRotate
{
0% {-webkit-transform: rotateX(0deg) rotateY(0deg););
-ms-transform: rotateX(0deg) rotateY(0deg););
-o-transform: rotateX(0deg) rotateY(0deg););
transform: rotateX(0deg) rotateY(0deg););}
100% {-webkit-transform: rotateX(360deg) rotateY(360deg);
-ms-transform: rotateX(360deg) rotateY(360deg);
-o-transform: rotateX(360deg) rotateY(360deg);
transform: rotateX(360deg) rotateY(360deg);}
}
/* Opera */
@-o-keyframes boxRotate
{
0% {-webkit-transform: rotateX(0deg) rotateY(0deg););
-ms-transform: rotateX(0deg) rotateY(0deg););
-o-transform: rotateX(0deg) rotateY(0deg););
transform: rotateX(0deg) rotateY(0deg););}
100% {-webkit-transform: rotateX(360deg) rotateY(360deg);
-ms-transform: rotateX(360deg) rotateY(360deg);
-o-transform: rotateX(360deg) rotateY(360deg);
transform: rotateX(360deg) rotateY(360deg);}
}最后效果，大功告成！
你是不是也实现了酷炫的css-3d效果呢？
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