import { BufferGeometry, Mesh } from "three";
export declare class GeometryUtils {
    static merge(geometriesByMaterial: BufferGeometry[][], splitByBlocks?: boolean): BufferGeometry;
    static mergeGltfMeshes(meshes: Mesh[]): Promise<BufferGeometry>;
    private static getMeshesAttributes;
    private static getMeshesIndices;
    private static getMeshGroup;
    private static cleanUpMesh;
    private static getIndicesOfMesh;
    private static cleanUp;
    private static setupMaterialGroups;
    private static mergeGeomsOfSameMaterial;
    private static splitByBlocks;
    private static checkAllGeometriesAreIndexed;
}