Function generateLinearTicks

packages/core/src/scales/ticks.ts:4–28

({
  count = 5,
  domain = [0, 1]
}: LinearTickOptions = {})

import type { LinearTickOptions, TimeTickOptions, TimeTickUnit } from "./types";

export const generateLinearTicks = ({
  count = 5,
  domain = [0, 1]
}: LinearTickOptions = {}): number[] => {
  const [start, stop] = domain;
  const reverse = stop < start;
  const min = reverse ? stop : start;
  const max = reverse ? start : stop;
  const step = tickStep(min, max, Math.max(1, count));

  if (step === 0) {
    return [start];
  }

  const first = Math.ceil(min / step) * step;
  const ticks: number[] = [];

  const epsilon = step * 1e-10;

  for (let value = first; value <= max + epsilon; value += step) {
    ticks.push(Number(value.toPrecision(12)));
  }

  return reverse ? ticks.reverse() : ticks;
};

const timeUnitMs: Record<TimeTickUnit, number> = {
  millisecond: 1,