Function getRoughScale

apps/chart/src/scale/coordinateScaleCalculator.ts:131–150

(scale: Required<Scale>, offsetSize: number, minStepSize = 1)

}

function getRoughScale(scale: Required<Scale>, offsetSize: number, minStepSize = 1): ScaleData {
  const { min, max } = scale;
  const limitSize = Math.abs(max - min);
  const valuePerPixel = limitSize / offsetSize;

  let stepCount = Math.ceil(offsetSize / DEFAULT_PIXELS_PER_STEP);

  const pixelsPerStep = offsetSize / stepCount;
  let stepSize = valuePerPixel * pixelsPerStep;

  if (hasStepSize(scale.stepSize)) {
    stepSize = scale.stepSize;
    stepCount = limitSize / stepSize;
  } else if (isNumber(minStepSize) && stepSize < minStepSize) {
    stepSize = minStepSize;
    stepCount = limitSize / stepSize;
  }

  return { limit: { min, max }, stepSize, stepCount };
}

export function makeScaleOption(dataRange: ValueEdge, scaleOptions?: Scale): Required<Scale> {
  return {