$('.box-container .box').each(function() {
$(this).on('mouseenter mouseleave', function(e) {
var $this = $(this),
width = $this.width(),
height = $this.height();
var x = (e.pageX - $this.offset().left - (width / 2)) * (width > height ? (height / width) : 1),
y = (e.pageY - $this.offset().top - (height / 2)) * (height > width ? (width / height) : 1);
// top = 0, right = 1, bottom = 2, left = 3
var dir_num = Math.round((((Math.atan2(y, x) * (180 / Math.PI)) + 180) / 90) + 3) % 4,
directions = ['top', 'right', 'bottom', 'left'];
// If mouse enter
if (e.type === 'mouseenter') {
// Remove all hover out classes
$this.removeClass(function(index, css) {
return (css.match(/(^|\s)hover-out-\S+/g) || []).join(' ');
});
// Add in direction class
$this.addClass('hover-in-' + directions[dir_num]);
}
// If mouse leave
if (e.type === 'mouseleave') {
// Remove all hover in classes
$this.removeClass(function(index, css) {
return (css.match(/(^|\s)hover-in-\S+/g) || []).join(' ');
});
// Add out direction class
$this.addClass('hover-out-' + directions[dir_num]);
}
});
});
* {
box-sizing: border-box;
}
.box-container {
padding: 20px;
width: 600px;
}
.box-container:after {
content: '';
display: block;
clear: both;
}
.box-container .box {
float: left;
width: 50%;
height: 200px;
position: relative;
perspective: 600px;
border: 1px solid transparent;
}
.box-container .box .front, .box-container .box .back {
float: none;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
transform-style: preserve-3d;
backface-visibility: hidden;
transition: all 1s ease-in-out;
color: white;
font-size: 60px;
}
.box-container .box .front {
background: blue;
transform: rotateX(0) rotateY(0);
z-index: 900;
}
.box-container .box .back {
background: red;
z-index: 800;
}
.box-container .box:hover .front {
z-index: 900;
}
.box-container .box:hover .back {
z-index: 1000;
transform: rotateX(180) rotateY(0);
}
.box-container .box.hover-in-top .front,
.box-container .box.hover-out-bottom .back {
transform: rotateX(-179deg) rotateY(0);
}
.box-container .box.hover-in-top .back,
.box-container .box.hover-out-bottom .front {
animation: Xminus 1s ease-in-out;
}
@keyframes Xminus {
from {transform: rotateX(179deg) rotateY(0);}
to {transform: rotateX( 0deg) rotateY(0);}
}
.box-container .box.hover-in-bottom .front,
.box-container .box.hover-out-top .back {
transform: rotateX(179deg);
}
.box-container .box.hover-in-bottom .back,
.box-container .box.hover-out-top .front {
animation: Xplus 1s ease-in-out;
}
@keyframes Xplus {
from {transform: rotateX(-179deg) rotateY(0);}
to {transform: rotateX( 0deg) rotateY(0);}
}
.box-container .box.hover-in-right .front,
.box-container .box.hover-out-left .back {
transform: rotateY(-179deg);
}
.box-container .box.hover-in-right .back,
.box-container .box.hover-out-left .front {
animation: Yminus 1s ease-in-out;
}
@keyframes Yminus {
from {transform: rotateX(0deg) rotateY(179deg);}
to {transform: rotateX(0deg) rotateY( 0deg);}
}
.box-container .box.hover-in-left .front,
.box-container .box.hover-out-right .back {
transform: rotateY(179deg);
}
.box-container .box.hover-in-left .back,
.box-container .box.hover-out-right .front {
animation: Yplus 1s ease-in-out;
}
@keyframes Yplus {
from {transform: rotateX(0deg) rotateY(-179deg);}
to {transform: rotateX(0deg) rotateY( 0deg);}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="box-container">
<div class="box">
<div class="front">FRONT</div>
<div class="back">BACK</div>
</div>
<div class="box">
<div class="front">FRONT</div>
<div class="back">BACK</div>
</div>
<div class="box">
<div class="front">FRONT</div>
<div class="back">BACK</div>
</div>
<div class="box">
<div class="front">FRONT</div>
<div class="back">BACK</div>
</div>
</div>