import type { Vec3 } from '../math';
import type { AnyStructure } from './index';
export type Pbc = readonly [boolean, boolean, boolean];
export declare const wrap_frac_coord: (coord: number) => number;
export declare const wrap_to_unit_cell: (frac: Vec3) => Vec3;
export declare function find_image_atoms(structure: AnyStructure): [number, Vec3, Vec3, boolean?][];
export declare function get_pbc_image_sites(structure: AnyStructure): AnyStructure;