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D3 arc clock
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<!DOCTYPE html> | |
<html> | |
<head> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<style type="text/css"> | |
path.overlay { | |
fill: orange; | |
} | |
path.base{ | |
fill: #f3f3f3; | |
} | |
</style> | |
</head> | |
<body> | |
<script type="text/javascript"> | |
var w = 960, | |
h = w*0.5625, // 16:9 aspect ratio | |
x = d3.scale.ordinal().domain(d3.range(5)).rangePoints([0, w], 0), | |
r = 2 * Math.PI | |
var fields = [ | |
{name: "hours", value: 0, size: 12}, | |
{name: "minutes", value: 0, size: 60}, | |
{name: "seconds", value: 0, size: 60} | |
]; | |
var arc = d3.svg.arc() | |
.innerRadius(w/12) | |
.outerRadius(w/12*1.15) | |
.startAngle(0) | |
.endAngle(function(d) { | |
return (d.value / d.size) * r; | |
}); | |
var basearc = d3.svg.arc() | |
.innerRadius(w/12) | |
.outerRadius(w/12*1.15) | |
.startAngle(0) | |
.endAngle(function(d) { | |
return 1 * r; | |
}); | |
var svg = d3.select("body").append("svg") | |
.attr("width", w) | |
.attr("height", h) | |
.append("g") | |
.attr("transform", "translate( 0," + (h / 2) + ")"); | |
var base = svg.selectAll(".base") | |
.data(fields); | |
base.enter().append("path") | |
.attr("transform", function(d, i) {return "translate(" + x(i+1) + ",0)"; }) | |
.attr("class",'base') | |
.attr("d",basearc) | |
setInterval(function() { | |
var now = new Date(); | |
fields[0].previous = fields[0].value; fields[0].value = changeto12(now.getHours()); | |
fields[1].previous = fields[1].value; fields[1].value = now.getMinutes(); | |
fields[2].previous = fields[2].value; fields[2].value = now.getSeconds(); | |
var path = svg.selectAll(".overlay") | |
.data(fields); | |
path.enter().append("path") | |
.attr("transform", function(d, i) {return "translate(" + x(i+1) + ",0)"; }) | |
.attr("class",'overlay') | |
.transition() | |
.duration(1000) | |
.attrTween("d", arcTween); | |
path.transition() | |
.duration(1000) | |
.attrTween("d", arcTween); | |
}, 1000); | |
function changeto12(num){ | |
if(num>12){return num-12;} | |
return num | |
} | |
function arcTween(b,i) { | |
if(b.value == 0) {b.value = b.size} | |
var i = d3.interpolate({value: b.previous}, b); | |
return function(t) { | |
return arc(i(t)); | |
}; | |
} | |
</script> | |
</body> | |
</html> |
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