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headwinds/.block

Last active August 18, 2016 18:49
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Arc Sentiment SVG
Raw
.block
license: gpl-3.0
Raw
index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.paths--straight {
fill: none;
stroke: transparent;
}
.paths--round {
fill: #ccc;
opacity: 0.5;
}
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>
var sentimentData = [{label: "positive", value:35, color:"#009900"}, {label: "negative", color:"#990000", value:10}, {label: "neutral", value:55, color:"#CCC"}];
/*
I'm creating two arrays here because I have no idea how
to update the length of each arc - hmmmm....
I'm thinking it has to do with arc(d) somewhere in here...
roundPath.data(arcs).attr("d", arc.cornerRadius(cornerRadius));
maybe
roundPath.data(arcs).attr("d", function(d){return d.value});
*/
let getSentimentValues = () => {
return sentimentData.map( function(node){return node.value});
};
let getSentimentColor = () => {
return sentimentData.map( function(node){return node.color});
};
let sentimentValues = getSentimentValues();
let sentimentColors = getSentimentColor();
var width = 960,
height = 500,
outerRadius = height / 2 - 30,
cornerRadius = 5;
var pie = d3.layout.pie();
var arc = d3.svg.arc()
.outerRadius(outerRadius);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
let getFill = (i) => {
return sentimentColors[i];
};
var roundPath = svg.append("g")
.attr("class", "path--round")
.selectAll("path")
.data(sentimentValues)
.enter().append("path")
.attr("opacity", 0.5)
.attr("fill", function(d,i){return getFill(i)});
var ease = d3.ease("cubic-in-out"),
duration = 2500;
d3.timer(function(elapsed) {
var t = ease(1 - Math.abs((elapsed % duration) / duration - .5) * 2);
let sentimentValues = sentimentData.map( function(node){return node.value});
var arcs = pie.padAngle(t * .01)(sentimentValues);
arc.innerRadius(outerRadius / (2 - t));
roundPath.data(arcs).attr("d", arc.cornerRadius(cornerRadius));
if ( t > 0.8 ) return true;
//return true;
});
</script>
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