點評：今天讀了篇關于如何使用css3創建3d四面體的文章，覺的相當不錯，所以拿出來和大家分享一下，如何使用div+css創建三角形。在這里我先把相關代碼粘貼出來，然后再為大家講解原理

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<div>
<div></div>
</div>

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<style type="text/css">
#pyramid {
position: relative;
margin: 100px auto;
height: 500px;
width: 100px;
}
#pyramid > div {
position: absolute;
border-style: solid;
border-width: 200px 0 200px 346px;
}
#pyramid > div:after {
position: absolute;
content: "Triangle";
color: #fff;
left: -250px;
text-align: center;
}
#pyramid > div:first-child {
border-color: #ff0000 transparent #ff0000 rgba(50, 50, 50, 0.6);
}
</style>

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#pyramid > div:first-child {
border-color: transparent transparent transparent rgba(50, 50, 50, 0.6);
}

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<div>
<div></div>
<div></div>
<div></div>
<div></div>
</div>

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<style type="text/css">
#pyramid {
position: relative;
margin: 100px auto;
height: 500px;
width: 100px;
-webkit-transform-style: preserve-3d;
-webkit-animation: spin 10s linear infinite;
-webkit-transform-origin: 116px 200px 116px;
-moz-transform-style: preserve-3d;
-moz-animation: spin 10s linear infinite;
-moz-transform-origin: 116px 200px 116px;
-ms-transform-style: preserve-3d;
-ms-animation: spin 10s linear infinite;
-ms-transform-origin: 116px 200px 116px;
transform-style: preserve-3d;
animation: spin 10s linear infinite;
transform-origin: 116px 200px 116px;
}
@-webkit-keyframes spin {
from {
-webkit-transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg);
}
to {
-webkit-transform: rotateX(360deg) rotateY(360deg) rotateZ(360deg);
}
}
@-moz-keyframes spin {
from {
-moz-transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg);
}
to {
-moz-transform: rotateX(360deg) rotateY(360deg) rotateZ(360deg);
}
}
@-ms-keyframes spin {
from {
-ms-transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg);
}
to {
-ms-transform: rotateX(360deg) rotateY(360deg) rotateZ(360deg);
}
}
@keyframes spin {
from {
transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg);
}
to {
transform: rotateX(360deg) rotateY(360deg) rotateZ(360deg);
}
}
#pyramid > div {
position: absolute;
border-style: solid;
border-width: 200px 0 200px 346px;
-webkit-transform-origin: 0 0;
-moz-transform-origin: 0 0;
-ms-transform-origin: 0 0;
transform-origin: 0 0;
}
#pyramid > div:after {
position: absolute;
content: "Triangle";
color: #fff;
left: -250px;
text-align: center;
}
#pyramid > div:first-child {
border-color: transparent transparent transparent rgba(50, 50, 50, 0.6);
-webkit-transform: rotateY(-19.5deg) rotateX(180deg) translateY(-400px);
-moz-transform: rotateY(-19.5deg) rotateX(180deg) translateY(-400px);
-ms-transform: rotateY(-19.5deg) rotateX(180deg) translateY(-400px);
transform: rotateY(-19.5deg) rotateX(180deg) translateY(-400px);
}
#pyramid > div:nth-child(2) {
border-color: transparent transparent transparent rgba(50, 50, 50, 0.6);
-webkit-transform: rotateY(90deg) rotateZ(60deg) rotateX(180deg) translateY(-400px);
-moz-transform: rotateY(90deg) rotateZ(60deg) rotateX(180deg) translateY(-400px);
-ms-transform: rotateY(90deg) rotateZ(60deg) rotateX(180deg) translateY(-400px);
transform: rotateY(90deg) rotateZ(60deg) rotateX(180deg) translateY(-400px);
}
#pyramid > div:nth-child(3) {
border-color: transparent transparent transparent rgba(50, 50, 50, 0.9);
-webkit-transform: rotateX(60deg) rotateY(19.5deg);
-moz-transform: rotateX(60deg) rotateY(19.5deg);
-ms-transform: rotateX(60deg) rotateY(19.5deg);
transform: rotateX(60deg) rotateY(19.5deg);
}
#pyramid > div:nth-child(4) {
border-color: transparent transparent transparent rgba(50, 50, 50, 0.8);
-webkit-transform: rotateX(-60deg) rotateY(19.5deg) translateX(-116px) translateY(-200px) translateZ(326px);
-moz-transform: rotateX(-60deg) rotateY(19.5deg) translateX(-116px) translateY(-200px) translateZ(326px);
-ms-transform: rotateX(-60deg) rotateY(19.5deg) translateX(-116px) translateY(-200px) translateZ(326px);
transform: rotateX(-60deg) rotateY(19.5deg) translateX(-116px) translateY(-200px) translateZ(326px);
}
</style>