Curious human. Interested in the mechanics of how things work.
getPointsForDates = {
const {width, height, margin } = sizes;
const scaleAngle = d3.scaleTime().domain(extentDays).range(extentAngles);
const scaleXByAngle = d3.scaleLinear().domain(extentAngles).range([margin, width - margin]);
const scaleYBySin = d3.scaleLinear().domain([-1,1]).range([height - margin, margin]);
return function(start, stop){
return d3.timeDay.range(start, d3.timeDay.offset(stop,1)).map(day => {
const angle = scaleAngle(day);
const x = scaleXByAngle(angle);
const y = scaleYBySin(Math.sin(angle));
const deltaX = -Math.sin(angle*2) * width / 40;
return [x + deltaX,y];
});
}
}
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