import { BufferAttribute, BufferGeometry, Float32BufferAttribute, InterleavedBufferAttribute } from 'three';
declare function computeMikkTSpaceTangents(geometry: any, MikkTSpace: any, negateSign?: boolean): any;
/**
 * @param  {Array<BufferGeometry>} geometries
 * @param  {Boolean} useGroups
 * @return {BufferGeometry}
 */
declare function mergeGeometries(geometries: any, useGroups?: boolean): BufferGeometry<import("three").NormalBufferAttributes> | null;
/**
 * @param {Array<BufferAttribute>} attributes
 * @return {BufferAttribute}
 */
declare function mergeAttributes(attributes: any): BufferAttribute | null;
/**
 * @param {BufferAttribute}
 * @return {BufferAttribute}
 */
export declare function deepCloneAttribute(attribute: any): BufferAttribute;
/**
 * @param {Array<BufferAttribute>} attributes
 * @return {Array<InterleavedBufferAttribute>}
 */
declare function interleaveAttributes(attributes: any): InterleavedBufferAttribute[] | null;
export declare function deinterleaveAttribute(attribute: any): BufferAttribute;
export declare function deinterleaveGeometry(geometry: any): void;
/**
 * @param {Array<BufferGeometry>} geometry
 * @return {number}
 */
declare function estimateBytesUsed(geometry: any): number;
/**
 * @param {BufferGeometry} geometry
 * @param {number} tolerance
 * @return {BufferGeometry}
 */
declare function mergeVertices(geometry: any, tolerance?: number): any;
/**
 * @param {BufferGeometry} geometry
 * @param {number} drawMode
 * @return {BufferGeometry}
 */
declare function toTrianglesDrawMode(geometry: any, drawMode: any): any;
/**
 * 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.
 */
declare function computeMorphedAttributes(object: any): {
    positionAttribute: any;
    normalAttribute: any;
    morphedPositionAttribute: Float32BufferAttribute;
    morphedNormalAttribute: Float32BufferAttribute;
};
declare 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}
 */
declare function toCreasedNormals(geometry: any, creaseAngle?: number): any;
declare function mergeBufferGeometries(geometries: any, useGroups?: boolean): BufferGeometry<import("three").NormalBufferAttributes> | null;
declare function mergeBufferAttributes(attributes: any): BufferAttribute | null;
export { computeMikkTSpaceTangents, mergeGeometries, mergeBufferGeometries, mergeAttributes, mergeBufferAttributes, interleaveAttributes, estimateBytesUsed, mergeVertices, toTrianglesDrawMode, computeMorphedAttributes, mergeGroups, toCreasedNormals, };