import { MeshStandardMaterial } from 'three';
/**
 * 贴图是否 png 格式
 * @param textureUrl
 * @returns
 */
export declare const isPNG: (textureUrl?: string) => boolean;
export declare const getTextureName: (dataView: DataView, texnamelen: number, offset: number) => string;
/**
 * 获取材质贴图路径
 * @param modelUrl 模型资源路径
 * @param name     贴图名称
 */
export declare const getTextureUrl: (url: string, path: string) => string;
/**
 * 生成 sbm 纹理
 * @param url
 */
export declare const generateSbmTexture: (material: MeshStandardMaterial, textureUrl: string) => void;
/**
 * 生成 sbm 材质
 * @param materialId
 * @param arr
 * @param png
 */
export declare const generateSbmMaterial: (materialId: string, arr: number[], png: boolean) => MeshStandardMaterial;