import React from 'react';
import * as THREE from 'three';
declare type ArcInstance = THREE.Group & {
    radius: number;
    tubeRadius: number;
    angularLength: number;
};
export declare const getCylBB: () => THREE.Box3;
export declare const getSphereBB: () => THREE.Box3;
export declare const getArcBB: (mesh: ArcInstance) => THREE.Box3;
export declare const MeshContext: React.Context<{
    MockCylinder: any;
    MockSphere: any;
    MockArc: any;
}>;
/**
 * Component which implements InstancedMesh from three.js.
 * Merged component from drei takes globaly created meshes and then passes corresponding "mocked" components via function props (MockCylinder and MockSphere) to children.
 * "mocked" components are used for saying drei where to draw instances.
 */
export declare const MergedWrapper: React.FC<{
    children?: React.ReactNode;
}>;
export {};