Function createPointScale

packages/core/src/scales/band.ts:42–64

({
  domain,
  range,
  padding = 0
}: CreatePointScaleOptions<TValue>)

};

export const createPointScale = <TValue extends string | number>({
  domain,
  range,
  padding = 0
}: CreatePointScaleOptions<TValue>): PointScale<TValue> => {
  const count = domain.length;
  const rangeSpan = range[1] - range[0];
  const step =
    count <= 1 ? 0 : rangeSpan / Math.max(1, count - 1 + padding * 2);
  const offset = count <= 1 ? rangeSpan / 2 : step * padding;
  const positions = new Map<TValue, number>();

  domain.forEach((value, index) => {
    positions.set(value, range[0] + offset + step * index);
  });

  return {
    domain,
    range,
    step,
    scale: (value: TValue) => positions.get(value)
  };
};