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experiment07b.html
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<!DOCTYPE HTML>
<html>
<head>
<title>CSS Experiment 06b</title>
<!-- https://codepen.io/desandro/pen/jxwELK -->
<style>
* { box-sizing: border-box; }
body {
font-family: sans-serif;
text-align: center;
}
.scene {
border: 1px solid #CCC;
margin: 40px 0;
position: relative;
width: 210px;
height: 140px;
margin: 80px auto;
perspective: 1000px;
}
.carousel {
width: 100%;
height: 100%;
position: absolute;
transform: translateZ(-288px);
transform-style: preserve-3d;
transition: transform 1s;
}
.carousel__cell {
position: absolute;
width: 190px;
height: 120px;
left: 10px;
top: 10px;
border: 2px solid black;
line-height: 116px;
font-size: 80px;
font-weight: bold;
color: white;
text-align: center;
transition: transform 1s, opacity 1s;
}
.carousel__cell:nth-child(9n+1) { background: hsla( 0, 100%, 50%, 0.8); }
.carousel__cell:nth-child(9n+2) { background: hsla( 40, 100%, 50%, 0.8); }
.carousel__cell:nth-child(9n+3) { background: hsla( 80, 100%, 50%, 0.8); }
.carousel__cell:nth-child(9n+4) { background: hsla(120, 100%, 50%, 0.8); }
.carousel__cell:nth-child(9n+5) { background: hsla(160, 100%, 50%, 0.8); }
.carousel__cell:nth-child(9n+6) { background: hsla(200, 100%, 50%, 0.8); }
.carousel__cell:nth-child(9n+7) { background: hsla(240, 100%, 50%, 0.8); }
.carousel__cell:nth-child(9n+8) { background: hsla(280, 100%, 50%, 0.8); }
.carousel__cell:nth-child(9n+0) { background: hsla(320, 100%, 50%, 0.8); }
.carousel__cell:nth-child(1) { transform: rotateY( 0deg) translateZ(288px); }
.carousel__cell:nth-child(2) { transform: rotateY( 40deg) translateZ(288px); }
.carousel__cell:nth-child(3) { transform: rotateY( 80deg) translateZ(288px); }
.carousel__cell:nth-child(4) { transform: rotateY(120deg) translateZ(288px); }
.carousel__cell:nth-child(5) { transform: rotateY(160deg) translateZ(288px); }
.carousel__cell:nth-child(6) { transform: rotateY(200deg) translateZ(288px); }
.carousel__cell:nth-child(7) { transform: rotateY(240deg) translateZ(288px); }
.carousel__cell:nth-child(8) { transform: rotateY(280deg) translateZ(288px); }
.carousel__cell:nth-child(9) { transform: rotateY(320deg) translateZ(288px); }
.carousel-options {
text-align: center;
position: relative;
z-index: 2;
background: hsla(0, 0%, 100%, 0.8);
}
</style>
</head>
<body>
<div class="scene">
<div class="carousel">
<div class="carousel__cell">1</div>
<div class="carousel__cell">2</div>
<div class="carousel__cell">3</div>
<div class="carousel__cell">4</div>
<div class="carousel__cell">5</div>
<div class="carousel__cell">6</div>
<div class="carousel__cell">7</div>
<div class="carousel__cell">8</div>
<div class="carousel__cell">9</div>
<div class="carousel__cell">10</div>
<div class="carousel__cell">11</div>
<div class="carousel__cell">12</div>
<div class="carousel__cell">13</div>
<div class="carousel__cell">14</div>
<div class="carousel__cell">15</div>
</div>
</div>
<div class="carousel-options">
<p>
<label>
Cells
<input class="cells-range" type="range" min="3" max="15" value="9" />
</label>
</p>
<p>
<button class="previous-button">Previous</button>
<button class="next-button">Next</button>
</p>
<p>
Orientation:
<label>
<input type="radio" name="orientation" value="horizontal" checked />
horizontal
</label>
<label>
<input type="radio" name="orientation" value="vertical" />
vertical
</label>
</p>
</div>
<script>
var carousel = document.querySelector('.carousel');
var cells = carousel.querySelectorAll('.carousel__cell');
var cellCount; // cellCount set from cells-range input value
var selectedIndex = 0;
var cellWidth = carousel.offsetWidth;
var cellHeight = carousel.offsetHeight;
var isHorizontal = true;
var rotateFn = isHorizontal ? 'rotateY' : 'rotateX';
var radius, theta;
// console.log( cellWidth, cellHeight );
function rotateCarousel() {
var angle = theta * selectedIndex * -1;
carousel.style.transform = 'translateZ(' + -radius + 'px) ' +
rotateFn + '(' + angle + 'deg)';
}
var prevButton = document.querySelector('.previous-button');
prevButton.addEventListener( 'click', function() {
selectedIndex--;
rotateCarousel();
});
var nextButton = document.querySelector('.next-button');
nextButton.addEventListener( 'click', function() {
selectedIndex++;
rotateCarousel();
});
var cellsRange = document.querySelector('.cells-range');
cellsRange.addEventListener( 'change', changeCarousel );
cellsRange.addEventListener( 'input', changeCarousel );
function changeCarousel() {
cellCount = cellsRange.value;
theta = 360 / cellCount;
var cellSize = isHorizontal ? cellWidth : cellHeight;
radius = Math.round( ( cellSize / 2) / Math.tan( Math.PI / cellCount ) );
for ( var i=0; i < cells.length; i++ ) {
var cell = cells[i];
if ( i < cellCount ) {
// visible cell
cell.style.opacity = 1;
var cellAngle = theta * i;
cell.style.transform = rotateFn + '(' + cellAngle + 'deg) translateZ(' + radius + 'px)';
} else {
// hidden cell
cell.style.opacity = 0;
cell.style.transform = 'none';
}
}
rotateCarousel();
}
var orientationRadios = document.querySelectorAll('input[name="orientation"]');
( function() {
for ( var i=0; i < orientationRadios.length; i++ ) {
var radio = orientationRadios[i];
radio.addEventListener( 'change', onOrientationChange );
}
})();
function onOrientationChange() {
var checkedRadio = document.querySelector('input[name="orientation"]:checked');
isHorizontal = checkedRadio.value == 'horizontal';
rotateFn = isHorizontal ? 'rotateY' : 'rotateX';
changeCarousel();
}
// set initials
onOrientationChange();
</script>
</body>
</html>