preface

Today I would like to share with my friends how to use CSS to achieve a cube. This article covers some of the less commonly used CSS properties: Perspective, Perspective-Origin, and transform-style.

  • Perspective: Specifies the distance between the observer and the z=0 plane, creating perspective for elements with 3d position transitions. Three dimensional elements with z>0 are larger than normal, while those with z<0 are smaller than normal.
  • Perspective-origin: Specifies the position of the observer, which is used as the vanishing point for the Perspective property.
  • Transform-style: Sets whether the element’s children reside in 3D space or in a plane.

structure

<div class="container">
    <div class="cube">
        <div class="back">back</div>
        <div class="down">down</div>
        <div class="up">up</div>
        <div class="right">right</div>
        <div class="left">left</div>
        <div class="front">front</div>
    </div>
</div>
Copy the code

The method I adopted was to use positioning to overlap the six faces of the cube. You can also design the DOM structure as one of the 11 cube plans shown below.

style

* {
    margin: 0;
    padding: 0;
}

.container {
    perspective: 800px;
    perspective-origin: center -200px;
}

.cube {
    position: relative;
    width: 150px;
    height: 150px;
    margin: calc(50vh - 75px) auto;
    /* Set child elements in 3D space */
    transform-style: preserve-3d;
    transform: rotateY(-45deg);
}

/* Overlap */
.cube div {
    position: absolute;
    top: 0;
    left: 0;
    width: 150px;
    height: 150px;
    line-height: 150px;
    text-align: center;
    font-size: 30px;
    color: #FFF;
}

.front {
    background: rgba(255.0.0.0.5);
    animation: front .5s ease .5s forwards;
}

.left {
    background: rgba(255.251.0.0.5);
    animation: left .5s ease 1.5s forwards;
}

.right {
    background: rgba(72.255.0.0.5);
    animation: right .5s ease 2s forwards;
}

.up {
    background: rgba(0.195.255.0.5);
    animation: up .5s ease 2.5s forwards;
}

.down {
    background: rgba(255.0.221.0.5);
    animation: down .5s ease 3s forwards;
}

.back {
    background: rgba(255.0.221.0.5);
    animation: back .5s ease 1s forwards;
}

/* Break down animation */
@keyframes front {
    0% {
        transform: translateZ(0);
    }

    100% {
        transform: translateZ(75px);
    }
}

@keyframes left {
    0% {
        transform: translateX(0) rotateY(0);
    }

    100% {
        transform: translateX(-75px) rotateY(-90deg);
    }
}

@keyframes right {
    0% {
            transform: translateX(0) rotateY(0);
    }

    100% {
            transform: translateX(75px) rotateY(90deg);
    }
}

@keyframes up {
    0% {
        transform: translateY(0) rotateX(0);
    }

    100% {
        transform: translateY(-75px) rotateX(90deg);
    }
}

@keyframes down {
    0% {
        transform: translateY(0) rotateX(0);
    }

    100% {
        transform: translateY(75px) rotateX(-90deg);
    }
}

@keyframes back {
    0% {
        transform: translateZ(0);
    }
    
    100% {
        transform: translateZ(-75px); }}Copy the code

Demo: jsdemo. Codeman. Top/HTML/cube. H…