import { ControllerExtensionBase } from '../ControllerExtensionBase';
import { MOUSE, Vector3 } from 'three';
/**
 * Fly extension options for initial extension state.
 */
export declare class FlyExtensionOptions {
    leftMouseButton: MOUSE | undefined;
    rightMouseButton: MOUSE | undefined;
    middleMouseButton: MOUSE | undefined;
}
/**
 * Fly controller extension for camera. Provides walk/fly movement and rotation actions.
 */
export declare class FlyControllerExtension extends ControllerExtensionBase {
    static getName: () => string;
    minPolarAngle: number;
    maxPolarAngle: number;
    pointerSpeed: number;
    movementSpeed: number;
    /** Min and max movement speed clamps. */
    private minSpeed;
    private maxSpeed;
    private isActive;
    private isLocked;
    private isMiddleDragging;
    private moveDown;
    private moveBackward;
    private moveUp;
    private moveLeft;
    private moveRight;
    private moveForward;
    private isCollisionBypassActive;
    private distanceToTarget;
    private mouseButtons;
    deleted(): void;
    constructor(viewerName: string, options: FlyExtensionOptions);
    setMouseButtonsActions(left?: MOUSE, right?: MOUSE, middle?: MOUSE): void;
    selected(): void;
    unselected(): void;
    private onMouseWheel;
    private lock;
    private unlock;
    private onMouseDown;
    private onMouseUp;
    private onMouseMove;
    private onKeyDown;
    private onKeyUp;
    private onPointerLockChange;
    private onPointerLockError;
    updated(delta: number): void;
    getTargetClone(): Vector3;
    added(): void;
    cameraModeChanged(perspective: boolean): boolean;
}