Function findPoint

src/plugins/plugin.filler/filler.target.stack.js:87–109

* @param {LineElement} line * @param {PointElement} sourcePoint * @param {string} property * @returns {{point?: PointElement, first?: boolean, last?: boolean}}

(line, sourcePoint, property)

 * @returns {{point?: PointElement, first?: boolean, last?: boolean}}
 */
function findPoint(line, sourcePoint, property) {
  const point = line.interpolate(sourcePoint, property);
  if (!point) {
    return {};
  }

  const pointValue = point[property];
  const segments = line.segments;
  const linePoints = line.points;
  let first = false;
  let last = false;
  for (let i = 0; i < segments.length; i++) {
    const segment = segments[i];
    const firstValue = linePoints[segment.start][property];
    const lastValue = linePoints[segment.end][property];
    if (_isBetween(pointValue, firstValue, lastValue)) {
      first = pointValue === firstValue;
      last = pointValue === lastValue;
      break;
    }
  }
  return {first, last, point};
}