Sass/CSS folding triangles in hexagon - html

Question

I'm trying to create a folding effect in a hexagon composed of triangles. So far I've only managed to make the triangles translate instead of folding over. I want to make
this http://jsfiddle.net/zn6jbhr6/
Relevant SCSS
#mixin hexTranslateKeyFrames($name, $degree) {
#keyframes #{$name} {
#content;
}
}
$hex-degree: 0deg;
#for $idx from 1 through 6 {
$hex-degree: $hex-degree + 60;
#include hexTranslateKeyFrames(hexTranslate#{$idx}, $hex-degree) {
0% { transform: rotateZ(0deg) rotate($hex-degree); }
54.55%, 100% { transform: rotateZ(360deg) rotate($hex-degree); }
}
}
$order2: (0s, 0.2s, 0.4s, 0.6s, 0.8s, 1s);
.folding-hex {
#include hexagon();
#for $i from 1 through 6 {
.triangle:nth-child(#{$i}) {
animation: hexTranslate#{$i} 2.2s infinite #{nth($order2, $i)} linear;
}
}
}
more like this http://jsfiddle.net/wvm15yL4/
Relevant CSS
.sk-folding-cube .sk-cube {
float: left;
width: 50%;
height: 50%;
position: relative;
-webkit-transform: scale(1.1);
-ms-transform: scale(1.1);
transform: scale(1.1);
}
.sk-folding-cube .sk-cube:before {
content: '';
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: #333;
-webkit-animation: sk-foldCubeAngle 2.4s infinite linear both;
animation: sk-foldCubeAngle 2.4s infinite linear both;
-webkit-transform-origin: 100% 100%;
-ms-transform-origin: 100% 100%;
transform-origin: 100% 100%;
}
.sk-folding-cube .sk-cube2 {
-webkit-transform: scale(1.1) rotateZ(90deg);
transform: scale(1.1) rotateZ(90deg);
}
.sk-folding-cube .sk-cube3 {
-webkit-transform: scale(1.1) rotateZ(180deg);
transform: scale(1.1) rotateZ(180deg);
}
.sk-folding-cube .sk-cube4 {
-webkit-transform: scale(1.1) rotateZ(270deg);
transform: scale(1.1) rotateZ(270deg);
}
.sk-folding-cube .sk-cube2:before {
-webkit-animation-delay: 0.3s;
animation-delay: 0.3s;
}
.sk-folding-cube .sk-cube3:before {
-webkit-animation-delay: 0.6s;
animation-delay: 0.6s;
}
.sk-folding-cube .sk-cube4:before {
-webkit-animation-delay: 0.9s;
animation-delay: 0.9s;
}
#-webkit-keyframes sk-foldCubeAngle {
0%, 10% {
-webkit-transform: perspective(140px) rotateX(-180deg);
transform: perspective(140px) rotateX(-180deg);
opacity: 0;
} 25%, 75% {
-webkit-transform: perspective(140px) rotateX(0deg);
transform: perspective(140px) rotateX(0deg);
opacity: 1;
} 90%, 100% {
-webkit-transform: perspective(140px) rotateY(180deg);
transform: perspective(140px) rotateY(180deg);
opacity: 0;
}
}
#keyframes sk-foldCubeAngle {
0%, 10% {
-webkit-transform: perspective(140px) rotateX(-180deg);
transform: perspective(140px) rotateX(-180deg);
opacity: 0;
} 25%, 75% {
-webkit-transform: perspective(140px) rotateX(0deg);
transform: perspective(140px) rotateX(0deg);
opacity: 1;
} 90%, 100% {
-webkit-transform: perspective(140px) rotateY(180deg);
transform: perspective(140px) rotateY(180deg);
opacity: 0;
}
}

Answer 1

You need to create an animation that rotates in 3D.
Since it is a little hard, I have done it only once, and reused it for the other elements setting an intermediate element in the DOM that does the rotation in the plane
The first 2 parameters in the rotate3D are sin(60deg) and cos(60deg), to make the rotation axis be at 60 deg
#keyframes flip {
0% { transform: rotate3d( 0.5, 0.866, 0, 90deg);
opacity: 0;}
0.1% { transform: rotate3d( 0.5, 0.866, 0, 90deg);
opacity: 1;}
14% { transform: rotate3d( 0.5, 0.866, 0, 0deg); }
50% { transform: rotate3d(-0.5, 0.866, 0, 0deg); }
63.99% { transform: rotate3d(-0.5, 0.866, 0, -90deg);
opacity: 1;}
64%, 100% { transform: rotate3d(-0.5, 0.866, 0, -90deg);
opacity: 0}
}
.folding-hex {
height: 69.28px;
width: 80px;
position: relative;
margin: 0 auto;
transform-origin: 0 0;
transform: translateX(40px) rotate(30deg); }
.rotator {
transform-origin: 20px 37.64px;
}
.rotator:nth-child(1) {
transform: rotate(0deg);
}
.rotator:nth-child(2) {
transform: rotate(60deg);
}
.rotator:nth-child(3) {
transform: rotate(120deg);
}
.rotator:nth-child(4) {
transform: rotate(180deg);
}
.rotator:nth-child(5) {
transform: rotate(240deg);
}
.rotator:nth-child(6) {
transform: rotate(300deg);
}
.triangle {
position: absolute;
width: 0;
height: 0;
border-style: solid;
border-width: 34.64px 20px 0;
transform-origin: 20px 37.64px;
border-color: #E50C4E transparent;
animation: flip 3s linear infinite;
}
.rotator:nth-child(2) .triangle {
border-color: #b5093d transparent;
animation-delay: -2.5s;
}
.rotator:nth-child(3) .triangle {
border-color: #b5093d transparent;
animation-delay: -2.0s;
}
.rotator:nth-child(4) .triangle {
animation-delay: -1.5s;
}
.rotator:nth-child(5) .triangle {
border-color: #f8799f transparent;
animation-delay: -1.0s;
}
.rotator:nth-child(6) .triangle {
border-color: #f8799f transparent;
animation-delay: -0.5s;
}
<div class="folding-hex">
<div class="rotator">
<div class="triangle"></div>
</div>
<div class="rotator">
<div class="triangle"></div>
</div>
<div class="rotator">
<div class="triangle"></div>
</div>
<div class="rotator">
<div class="triangle"></div>
</div>
<div class="rotator">
<div class="triangle"></div>
</div>
<div class="rotator">
<div class="triangle"></div>
</div>
</div>