import { ConstructorProps, Component, ContextManager, Observable } from '@zcomponent/core';
import * as THREE from 'three';
import { Sky } from 'three/examples/jsm/objects/Sky';
/**
 * Represents the properties required to construct a SkyEnvironment.
 */
export interface SkyEnvironmentConstructorProps extends ConstructorProps {
    /**
     * If true, the sky environment will be shown at runtime.
     * @zprop
     * @zdefault false
     */
    showAtRunTime: boolean;
}
/**
 * A sky environment component.
 *
 * It renders a sky environment map that can be used as the scene's environment map.
 *
 * @see https://threejs.org/docs/#api/en/scenes/Scene.environment
 * @zcomponent
 * @zgroup Environment
 * @zicon environment
 * @ztag three/Environment/SkyEnvironment
 * @zparents three/Object3D/Group/**
 */
export declare class SkyEnvironment extends Component {
    private target?;
    private skyScene;
    private pmrem;
    element: Sky;
    environmentMapSkyElement: Sky;
    private sun;
    private uniforms;
    useEnvironmentMap: Observable<boolean, never>;
    /**
     * Whether to use the environment map in the scene.
     * @zprop
     * @zgroup Environment Map
     * @zgrouppriority 5
     * @zdefault true
     */
    setSceneEnvironmentMap: Observable<boolean, never>;
    /**
     * The rayleigh of the sky.
     * @zprop
     * @zgroup Sky Appearance
     * @zgrouppriority 5
     * @ztype proportion
     * @zdefault 0.75
     */
    rayleigh: Observable<number, never>;
    /**
     * The mieCoefficient of the sky.
     * @zprop
     * @zgroup Sky Appearance
     * @zgrouppriority 5
     * @ztype proportion
     * @zdefault 0.05
     */
    mieCoefficient: Observable<number, never>;
    /**
     * The Sky mieDirectionalG of the sky.
     * @zprop
     * @zgroup Sky Appearance
     * @zgrouppriority 5
     * @ztype proportion
     * @zdefault 0.7
     */
    mieDirectionalG: Observable<number, never>;
    /**
     * The elevation of the sun.
     * @zprop
     * @zgroup Sky Appearance
     * @zgrouppriority 5
     * @ztype proportion
     * @zdefault 0.022
     */
    elevation: Observable<number, never>;
    /**
     * The azimuth of the sun.
     * @zprop
     * @zgroup Sky Appearance
     * @zgrouppriority 5
     * @ztype proportion
     * @zdefault 0.5
     */
    azimuth: Observable<number, never>;
    /**
     * Sets the visibility of the sky.
     * This does not affect the environment map.
     * @zprop
     * @zgroup Appearance
     * @zgrouppriority 5
     * @zdefault true
     */
    visible: Observable<boolean, never>;
    /**
     * Constructs a new SkyEnvironment.
     * @param contextManager - The context manager.
     * @param props - The properties required to construct a SkyEnvironment.
     */
    constructor(contextManager: ContextManager, props: SkyEnvironmentConstructorProps);
    /**
     * The environment map.
     */
    get environmentMap(): THREE.Texture | undefined;
    private updateSky;
    /**
     * Disposes the SkyEnvironment.
     */
    dispose(): never;
}