Function sortedKeys

src/parsers/colmapWriterUtils.ts:30–37

(map: Map<K, unknown>)

 * Sort map keys numerically. COLMAP sorts entries by ID before writing.
 */
export function sortedKeys<K extends number | bigint>(map: Map<K, unknown>): K[] {
  return Array.from(map.keys()).sort((a, b) => {
    if (typeof a === 'bigint' && typeof b === 'bigint') {
      return a < b ? -1 : a > b ? 1 : 0;
    }
    return Number(a) - Number(b);
  });
}

export function toBinaryPoint3DId(id: Point3DId): bigint {
  return id === UNMATCHED_POINT3D_ID ? COLMAP_INVALID_POINT3D_ID : id;