import { Behavior, ContextManager, Observable } from '@zcomponent/core';
import { Object3D } from '../components/Object3D';
/**
 * An enum of orbit actions.
 */
export declare enum OrbitAction {
    /**
     * No action.
     */
    None = "None",
    /**
     * Pan the camera.
     */
    Pan = "Pan",
    /**
     * Rotate the camera.
     */
    Rotate = "Rotate",
    /**
     * Dolly the camera.
     */
    Dolly = "Dolly"
}
/**
 * A base class for orbit behaviors.
 */
export declare class Orbit extends Behavior<Object3D> {
    /**
     * The acton to perform when the left mouse button is pressed.
     * @zprop
     * @zdefault [0, 0, 0]
     */
    initialTarget: Observable<never, [number, number, number]>;
    /**
     * The rotation speed of the orbit.
     * @zprop
     * @zdefault 1
     * @zgroup Settings
     * @zgrouppriority 4
     */
    rotationSpeed: Observable<number, never>;
    /**
     * The pan speed of the orbit.
     * @zprop
     * @zdefault 1
     * @zgroup Settings
     * @zgrouppriority 4
     */
    panSpeed: Observable<number, never>;
    /**
     * The zoom speed of the orbit.
     * @zprop
     * @zdefault 1
     * @zgroup Settings
     * @zgrouppriority 4
     */
    zoomSpeed: Observable<number, never>;
    /**
     * The damping factor of the orbit.
     * @zprop
     * @zdefault 0.05
     * @zgroup Settings
     * @zgrouppriority 4
     */
    dampingFactor: Observable<number, never>;
    /**
     * The minimum polar angle of the orbit.
     * @zprop
     * @zdefault 0
     * @zgroup Limits
     * @zgrouppriority 3
     */
    minPolarAngle: Observable<number, never>;
    /**
     * The maximum polar angle of the orbit.
     * @zprop
     * @zdefault 3.141592
     * @zgroup Limits
     * @zgrouppriority 3
     */
    maxPolarAngle: Observable<number, never>;
    private _sphericalDelta;
    private _panOffset;
    private _scale;
    /**
     * Constructs a new Orbit Behavior.
     * @param contextManager - The context manager.
     * @param instance - The Object3D instance.
     */
    constructor(contextManager: ContextManager, instance: Object3D);
    private _frame;
    protected _rotate(x: number, y: number): void;
    protected _pan(x: number, y: number): void;
    protected _getZoomScale(): number;
    private _panLeft;
    private _panUp;
    protected _dollyOut(n: number): void;
    protected _dollyIn(n: number): void;
}