The avatar for @cs7290
cs7290
Public
Edited
Oct 24, 2022
Fork of Radial Area Chart with Brush
•
1 fork
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brushArea = d3.areaRadial()
.angle(d => x(d))
.innerRadius(innerRadius)
.outerRadius(outerRadius);
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drag = {

function dragged(e) {
const theta = Math.PI - Math.atan2(...d3.pointer(e));
set(viewof Theta, theta);
set(viewof brushStop, x.invert(theta));
d3.select(chart).selectAll("#brush-area")
.data([Array(100).fill(1).map( (d, i) => i * (x.invert(theta) - brushStart) / 100 + brushStart)])
.join("path")
.attr("d", d => brushArea(d))
.attr("fill", "grey")
.attr("stroke", "black")
.attr("opacity", 0.5)
.attr("id", "brush-area");
}

return d3.drag()
.on("start drag end", dragged);
}
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{
let svg = d3.select(chart);
svg.on("mousedown", (e) => {
svg.selectAll("#brush-area").remove();
const theta = Math.PI - Math.atan2(...d3.pointer(e));
set(viewof brushStart, x.invert(theta));
});
svg.call(drag)
}

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viewof Theta = Inputs.range([0,6.5], { label: "theta" })
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chart
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import {chart, x, innerRadius, outerRadius} from "@d3/radial-area-chart"
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d3 = require("d3@7")
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