/**
 * Helper class, provides mesh visibility methods.
 */
export class VisibilityHelper {
    constructor(world?: World);
    world: World;
    scene: any;
    dispose(): void;
    /**
     * Returns true if target mesh is visible, performs least expensive checks first, then more expensive ones.
     * It's supposed to test multiple points of the mesh, tests only one for the time being.
     * Calls this.isClosestMesh to determine visibility.
     * @param target babylonjs mesh to test for visibility
     * @param {number} [confidence=1] minimum number of points required to be visible
     * @param {Vector3} [offset=new BABYLON.Vector3(0,0,0)] offset to add to mesh position before testing
     */
    isVisible(target: any, confidence?: number, offset?: Vector3): boolean;
    /**
     * Casts a ray from the camera to the point, and returns true if the mesh is hit.
     * Mesh may be root node of the scene, or any mesh in the scene.
     */
    isClosestMesh(camera: any, mesh: any, point: any): boolean;
    /**
     * Traverses VRObject scene, and returns visible avatars.
     */
    getVisibleAvatars(confidence?: number): any[];
    /**
     * Traverses all VRObjects in the scene, and returns avatars out of active camera frustrum
     */
    getAvatarsOutOfView(): any;
    /**
     * Traverses scene root nodes, and returns visible objects.
     */
    getVisibleObjects(confidence?: number): any[];
    /** Traverses give babyolonjs node array, and returns visible nodes */
    getVisibleOf(nodeArray: any, confidence?: number): any[];
    /** Traverses given User array, and returns array of visible User objects */
    getVisibleUsers(userArray: any, confidence?: number): any[];
}
import { World } from "./world.js";