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Last active September 30, 2015 03:14
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Movie Countdown with Greensock
Raw
Readme.md

Simple countdown using Greensock. You could add an "onComplete" to the Tweenlite to trigger an event when the countdown ends.

Raw
index.html
<!DOCTYPE html>
<html>
<head>
<style>
body {
background: #000;
}
.dial-wrapper {
font-size: 72px;
margin: auto;
position: relative;
width: 2em;
height: 2em;
border-radius: 2em;
background: rgba(255,255,255,0.1);
}
.dial-counter {
display: block;
width: 2em;
line-height: 2em;
text-align: center;
color: rgba(255,255,255,0.5);
}
.dial-wrapper:after {
content: '';
position: absolute;
display: block;
top: -4px;
right: -4px;
bottom: -4px;
left: -4px;
border-radius: 2em;
border: 2px solid rgba(255,255,255,0.2);
}
.dial-container {
position: absolute;
top: 0;
bottom: 0;
overflow: hidden;
width: 50%;
}
.dial-wedge {
background: rgba(255,255,255,0.2);
height: 100%;
width: 100%;
}
.dial-container1 {
left: 50%;
}
.dial-container1 .dial-wedge {
border-radius: 0 1em 1em 0;
}
.dial-container2 {
left: 0;
}
.dial-container2 .dial-wedge {
border-radius: 1em 0 0 1em;
}
.dial-hand {
position: absolute;
top: 0;
left: 0;
width: 50%;
height: 50%;
border-right: 3px solid rgba(255,255,255,0.5);
}
</style>
</head>
<body>
<div class="dial-wrapper">
<div class="dial-counter">5</div>
<div class="dial-container dial-container1">
<div class="dial-wedge"></div>
</div>
<div class="dial-container dial-container2">
<div class="dial-wedge"></div>
</div>
<div class="dial-hand"></div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/1.18.0/plugins/CSSPlugin.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/1.18.0/TweenLite.min.js"></script>
<script>
(function (control) {
var counter = document.querySelector('.dial-counter'),
hand = document.querySelector('.dial-hand'),
container1 = document.querySelector('.dial-container1 .dial-wedge'),
container2 = document.querySelector('.dial-container2 .dial-wedge'),
count = ~~counter.textContent;
TweenLite.set(hand, { transformOrigin: '100% 100%' });
TweenLite.set(container1, { transformOrigin: '0 50%' });
TweenLite.set(container2, { transformOrigin: '100% 50%' });
TweenLite.to(control, count, {
t: count,
onUpdate: function () {
var t = control.t;
TweenLite.set(hand, { rotation: t*360 });
TweenLite.set(container1, { rotation: (t % 1 > 0.5) ? 180 : t*360 });
TweenLite.set(container2, { rotation: (t % 1 < 0.5) ? 0 : t*360 + 180 });
counter.textContent = Math.ceil(count - t);
},
ease:Linear.easeNone
});
})({t: 0});
</script>
</body>
</html>
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