/**
 * @param {BufferAttribute} attribute
 * @return {BufferAttribute}
 */
export function deepCloneAttribute(attribute: BufferAttribute): BufferAttribute;
export function deinterleaveAttribute(attribute: any): BufferAttribute;
export function deinterleaveGeometry(geometry: any): void;
import { BufferAttribute } from 'three';
export function computeMikkTSpaceTangents(geometry: any, MikkTSpace: any, negateSign?: boolean): any;
/**
 * @param  {Array<BufferGeometry>} geometries
 * @param  {boolean} useGroups
 * @return {BufferGeometry}
 */
export function mergeGeometries(geometries: Array<BufferGeometry>, useGroups?: boolean): BufferGeometry;
/**
 * @param {Array<BufferAttribute>} attributes
 * @return {BufferAttribute}
 */
export function mergeAttributes(attributes: Array<BufferAttribute>): BufferAttribute;
/**
 * @param {Array<BufferAttribute>} attributes
 * @return {Array<InterleavedBufferAttribute>}
 */
export function interleaveAttributes(attributes: Array<BufferAttribute>): Array<InterleavedBufferAttribute>;
/**
 * @param {BufferGeometry} geometry
 * @return {number}
 */
export function estimateBytesUsed(geometry: BufferGeometry): number;
/**
 * @param {BufferGeometry} geometry
 * @param {number} tolerance
 * @return {BufferGeometry}
 */
export function mergeVertices(geometry: BufferGeometry, tolerance?: number): BufferGeometry;
/**
 * @param {BufferGeometry} geometry
 * @param {number} drawMode
 * @return {BufferGeometry}
 */
export function toTrianglesDrawMode(geometry: BufferGeometry, drawMode: number): BufferGeometry;
/**
 * Calculates the morphed attributes of a morphed/skinned BufferGeometry.
 * Helpful for Raytracing or Decals.
 * @param {Mesh | Line | Points} object An instance of Mesh, Line or Points.
 * @return {Object} An Object with original position/normal attributes and morphed ones.
 */
export function computeMorphedAttributes(object: Mesh | Line | Points): Object;
export function mergeGroups(geometry: any): any;
/**
 * Modifies the supplied geometry if it is non-indexed, otherwise creates a new,
 * non-indexed geometry. Returns the geometry with smooth normals everywhere except
 * faces that meet at an angle greater than the crease angle.
 *
 * @param {BufferGeometry} geometry
 * @param {number} [creaseAngle]
 * @return {BufferGeometry}
 */
export function toCreasedNormals(geometry: BufferGeometry, creaseAngle?: number): BufferGeometry;
import { BufferGeometry } from 'three';
import { InterleavedBufferAttribute } from 'three';