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jfourmond/.block

Created October 30, 2017 10:35
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Loading Circle V0 - Movement
Raw
.block
license: mit
Raw
index.html
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v4.min.js"></script>
<style>
body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
</style>
</head>
<body>
<script>
const width = 960;
const height = 500;
const midWidth = Math.floor(width/2);
const midHeight = Math.floor(height/2);
const color = d3.scaleOrdinal(d3.schemeCategory10);
let colorVar = 0;
function rotateClockwise(transition) {
transition
.duration(5000)
.ease(d3.easeLinear)
.attrTween("cx", function() {
let that = d3.select(this);
return function(t) {
return(midWidth + 50 * Math.cos(2 * Math.PI * t));
}
})
.attrTween("cy", function() {
let that = d3.select(this);
return function(t) {
return(midHeight + 50 * Math.sin(2 * Math.PI * t));
}
}).on("end", function() {
d3.select(this).transition().call(rotateClockwise);
});;
}
const svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
const circle = svg.append("circle")
.attr("cx", midWidth)
.attr("cy", midHeight)
.attr("r", 20)
.attr("fill", color(colorVar++));
circle.transition().call(rotateClockwise);
</script>
</body>
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