/**
 * Callback used by {@link AppBase#configure} when configuration file is loaded and parsed (or an
 * error occurs).
 */
export type ConfigureAppCallback = (err: string | null) => void;
/**
 * Callback used by {@link AppBase#preload} when all assets (marked as 'preload') are loaded.
 */
export type PreloadAppCallback = () => void;
/**
 * Callback used by {@link AppBase#start} and itself to request the rendering of a new animation
 * frame.
 */
export type MakeTickCallback = (timestamp?: number, frame?: XRFrame) => void;
/**
 * @import { AppOptions } from './app-options.js'
 * @import { BatchManager } from '../scene/batching/batch-manager.js'
 * @import { ElementInput } from './input/element-input.js'
 * @import { GamePads } from '../platform/input/game-pads.js'
 * @import { GraphicsDevice } from '../platform/graphics/graphics-device.js'
 * @import { Keyboard } from '../platform/input/keyboard.js'
 * @import { Lightmapper } from './lightmapper/lightmapper.js'
 * @import { Material } from '../scene/materials/material.js'
 * @import { MeshInstance } from '../scene/mesh-instance.js'
 * @import { Mesh } from '../scene/mesh.js'
 * @import { Mouse } from '../platform/input/mouse.js'
 * @import { SoundManager } from '../platform/sound/manager.js'
 * @import { Texture } from '../platform/graphics/texture.js'
 * @import { TouchDevice } from '../platform/input/touch-device.js'
 * @import { XrManager } from './xr/xr-manager.js'
 */
/**
 * @callback ConfigureAppCallback
 * Callback used by {@link AppBase#configure} when configuration file is loaded and parsed (or an
 * error occurs).
 * @param {string|null} err - The error message in the case where the loading or parsing fails.
 * @returns {void}
 */
/**
 * @callback PreloadAppCallback
 * Callback used by {@link AppBase#preload} when all assets (marked as 'preload') are loaded.
 * @returns {void}
 */
/**
 * @callback MakeTickCallback
 * Callback used by {@link AppBase#start} and itself to request the rendering of a new animation
 * frame.
 * @param {number} [timestamp] - The timestamp supplied by requestAnimationFrame.
 * @param {XRFrame} [frame] - XRFrame from requestAnimationFrame callback.
 * @returns {void}
 */
/**
 * Gets the current application, if any.
 *
 * @type {AppBase|null}
 * @ignore
 */
export let app: AppBase | null;
/**
 * AppBase represents the base functionality for all PlayCanvas applications. It is responsible for
 * initializing and managing the application lifecycle. It coordinates core engine systems such
 * as:
 *
 * - The graphics device - see {@link GraphicsDevice}.
 * - The asset registry - see {@link AssetRegistry}.
 * - The component system registry - see {@link ComponentSystemRegistry}.
 * - The scene - see {@link Scene}.
 * - Input devices - see {@link Keyboard}, {@link Mouse}, {@link TouchDevice}, and {@link GamePads}.
 * - The main update/render loop.
 *
 * Using AppBase directly requires you to register {@link ComponentSystem}s and
 * {@link ResourceHandler}s yourself. This facilitates
 * [tree-shaking](https://developer.mozilla.org/en-US/docs/Glossary/Tree_shaking) when bundling
 * your application.
 */
export class AppBase extends EventHandler {
    static _applications: {};
    /**
     * Get the current application. In the case where there are multiple running applications, the
     * function can get an application based on a supplied canvas id. This function is particularly
     * useful when the current Application is not readily available. For example, in the JavaScript
     * console of the browser's developer tools.
     *
     * @param {string} [id] - If defined, the returned application should use the canvas which has
     * this id. Otherwise current application will be returned.
     * @returns {AppBase|undefined} The running application, if any.
     * @example
     * const app = pc.AppBase.getApplication();
     */
    static getApplication(id?: string): AppBase | undefined;
    static cancelTick(app: any): void;
    /**
     * Create a new AppBase instance.
     *
     * @param {HTMLCanvasElement | OffscreenCanvas} canvas - The canvas element.
     * @example
     * const app = new pc.AppBase(canvas);
     *
     * const options = new AppOptions();
     * app.init(options);
     *
     * // Start the application's main loop
     * app.start();
     */
    constructor(canvas: HTMLCanvasElement | OffscreenCanvas);
    /**
     * The application's batch manager.
     *
     * @type {BatchManager|null}
     * @private
     */
    private _batcher;
    /** @private */
    private _destroyRequested;
    /** @private */
    private _inFrameUpdate;
    /** @private */
    private _librariesLoaded;
    /** @private */
    private _fillMode;
    /** @private */
    private _resolutionMode;
    /** @private */
    private _allowResize;
    /**
     * @type {Asset|null}
     * @private
     */
    private _skyboxAsset;
    /**
     * @type {SoundManager}
     * @private
     */
    private _soundManager;
    /** @private */
    private _visibilityChangeHandler;
    /**
     * Stores all entities that have been created for this app by guid.
     *
     * @type {Object<string, Entity>}
     * @ignore
     */
    _entityIndex: {
        [x: string]: Entity;
    };
    /**
     * @type {boolean}
     * @ignore
     */
    _inTools: boolean;
    /**
     * @type {string}
     * @ignore
     */
    _scriptPrefix: string;
    /** @ignore */
    _time: number;
    /**
     * Set this to false if you want to run without using bundles. We set it to true only if
     * TextDecoder is available because we currently rely on it for untarring.
     *
     * @type {boolean}
     * @ignore
     */
    enableBundles: boolean;
    /**
     * A request id returned by requestAnimationFrame, allowing us to cancel it.
     *
     * @ignore
     */
    frameRequestId: any;
    /**
     * Scales the global time delta. Defaults to 1.
     *
     * @type {number}
     * @example
     * // Set the app to run at half speed
     * this.app.timeScale = 0.5;
     */
    timeScale: number;
    /**
     * Clamps per-frame delta time to an upper bound. Useful since returning from a tab
     * deactivation can generate huge values for dt, which can adversely affect game state.
     * Defaults to 0.1 (seconds).
     *
     * @type {number}
     * @example
     * // Don't clamp inter-frame times of 200ms or less
     * this.app.maxDeltaTime = 0.2;
     */
    maxDeltaTime: number;
    /**
     * The total number of frames the application has updated since start() was called.
     *
     * @type {number}
     * @ignore
     */
    frame: number;
    /**
     * The frame graph.
     *
     * @type {FrameGraph}
     * @ignore
     */
    frameGraph: FrameGraph;
    /**
     * The forward renderer.
     *
     * @type {ForwardRenderer}
     * @ignore
     */
    renderer: ForwardRenderer;
    /**
     * Scripts in order of loading first.
     *
     * @type {string[]}
     */
    scriptsOrder: string[];
    /**
     * The application's performance stats.
     *
     * @type {ApplicationStats}
     * @ignore
     */
    stats: ApplicationStats;
    /**
     * When true, the application's render function is called every frame. Setting autoRender to
     * false is useful to applications where the rendered image may often be unchanged over time.
     * This can heavily reduce the application's load on the CPU and GPU. Defaults to true.
     *
     * @type {boolean}
     * @example
     * // Disable rendering every frame and only render on a keydown event
     * this.app.autoRender = false;
     * this.app.keyboard.on('keydown', (event) => {
     *     this.app.renderNextFrame = true;
     * });
     */
    autoRender: boolean;
    /**
     * Set to true to render the scene on the next iteration of the main loop. This only has an
     * effect if {@link autoRender} is set to false. The value of renderNextFrame is set back to
     * false again as soon as the scene has been rendered.
     *
     * @type {boolean}
     * @example
     * // Render the scene only while space key is pressed
     * if (this.app.keyboard.isPressed(pc.KEY_SPACE)) {
     *     this.app.renderNextFrame = true;
     * }
     */
    renderNextFrame: boolean;
    /**
     * The graphics device used by the application.
     *
     * @type {GraphicsDevice}
     */
    graphicsDevice: GraphicsDevice;
    /**
     * The root entity of the application.
     *
     * @type {Entity}
     * @example
     * // Return the first entity called 'Camera' in a depth-first search of the scene hierarchy
     * const camera = this.app.root.findByName('Camera');
     */
    root: Entity;
    /**
     * The scene managed by the application.
     *
     * @type {Scene}
     * @example
     * // Set the fog type property of the application's scene
     * this.app.scene.fog.type = pc.FOG_LINEAR;
     */
    scene: Scene;
    /**
     * The run-time lightmapper.
     *
     * @type {Lightmapper|null}
     */
    lightmapper: Lightmapper | null;
    /**
     * The resource loader.
     *
     * @type {ResourceLoader}
     */
    loader: ResourceLoader;
    /**
     * The asset registry managed by the application.
     *
     * @type {AssetRegistry}
     * @example
     * // Search the asset registry for all assets with the tag 'vehicle'
     * const vehicleAssets = this.app.assets.findByTag('vehicle');
     */
    assets: AssetRegistry;
    /**
     * The bundle registry managed by the application.
     *
     * @type {BundleRegistry}
     * @ignore
     */
    bundles: BundleRegistry;
    /**
     * The scene registry managed by the application.
     *
     * @type {SceneRegistry}
     * @example
     * // Search the scene registry for a item with the name 'racetrack1'
     * const sceneItem = this.app.scenes.find('racetrack1');
     *
     * // Load the scene using the item's url
     * this.app.scenes.loadScene(sceneItem.url);
     */
    scenes: SceneRegistry;
    /**
     * The application's script registry.
     *
     * @type {ScriptRegistry}
     */
    scripts: ScriptRegistry;
    /**
     * The application's component system registry.
     *
     * @type {ComponentSystemRegistry}
     * @example
     * // Set global gravity to zero
     * this.app.systems.rigidbody.gravity.set(0, 0, 0);
     * @example
     * // Set the global sound volume to 50%
     * this.app.systems.sound.volume = 0.5;
     */
    systems: ComponentSystemRegistry;
    /**
     * Handles localization.
     *
     * @type {I18n}
     */
    i18n: I18n;
    /**
     * The keyboard device.
     *
     * @type {Keyboard|null}
     */
    keyboard: Keyboard | null;
    /**
     * The mouse device.
     *
     * @type {Mouse|null}
     */
    mouse: Mouse | null;
    /**
     * Used to get touch events input.
     *
     * @type {TouchDevice|null}
     */
    touch: TouchDevice | null;
    /**
     * Used to access GamePad input.
     *
     * @type {GamePads|null}
     */
    gamepads: GamePads | null;
    /**
     * Used to handle input for {@link ElementComponent}s.
     *
     * @type {ElementInput|null}
     */
    elementInput: ElementInput | null;
    /**
     * The XR Manager that provides ability to start VR/AR sessions.
     *
     * @type {XrManager|null}
     * @example
     * // check if VR is available
     * if (app.xr.isAvailable(pc.XRTYPE_VR)) {
     *     // VR is available
     * }
     */
    xr: XrManager | null;
    /**
     * Initialize the app.
     *
     * @param {AppOptions} appOptions - Options specifying the init parameters for the app.
     */
    init(appOptions: AppOptions): void;
    defaultLayerWorld: Layer;
    defaultLayerDepth: Layer;
    defaultLayerSkybox: Layer;
    defaultLayerUi: Layer;
    defaultLayerImmediate: Layer;
    _hiddenAttr: string;
    tick: MakeTickCallback;
    /** @private */
    private _initDefaultMaterial;
    /** @private */
    private _initProgramLibrary;
    /**
     * @type {SoundManager}
     * @ignore
     */
    get soundManager(): SoundManager;
    /**
     * The application's batch manager. The batch manager is used to merge mesh instances in
     * the scene, which reduces the overall number of draw calls, thereby boosting performance.
     *
     * @type {BatchManager}
     */
    get batcher(): BatchManager;
    /**
     * The current fill mode of the canvas. Can be:
     *
     * - {@link FILLMODE_NONE}: the canvas will always match the size provided.
     * - {@link FILLMODE_FILL_WINDOW}: the canvas will simply fill the window, changing aspect ratio.
     * - {@link FILLMODE_KEEP_ASPECT}: the canvas will grow to fill the window as best it can while
     * maintaining the aspect ratio.
     *
     * @type {string}
     */
    get fillMode(): string;
    /**
     * The current resolution mode of the canvas, Can be:
     *
     * - {@link RESOLUTION_AUTO}: if width and height are not provided, canvas will be resized to
     * match canvas client size.
     * - {@link RESOLUTION_FIXED}: resolution of canvas will be fixed.
     *
     * @type {string}
     */
    get resolutionMode(): string;
    /**
     * Load the application configuration file and apply application properties and fill the asset
     * registry.
     *
     * @param {string} url - The URL of the configuration file to load.
     * @param {ConfigureAppCallback} callback - The Function called when the configuration file is
     * loaded and parsed (or an error occurs).
     */
    configure(url: string, callback: ConfigureAppCallback): void;
    /**
     * Load all assets in the asset registry that are marked as 'preload'.
     *
     * @param {PreloadAppCallback} callback - Function called when all assets are loaded.
     */
    preload(callback: PreloadAppCallback): void;
    _preloadScripts(sceneData: any, callback: any): void;
    _parseApplicationProperties(props: any, callback: any): void;
    _width: any;
    _height: any;
    /**
     * @param {string[]} urls - List of URLs to load.
     * @param {Function} callback - Callback function.
     * @private
     */
    private _loadLibraries;
    /**
     * Insert scene name/urls into the registry.
     *
     * @param {*} scenes - Scenes to add to the scene registry.
     * @private
     */
    private _parseScenes;
    /**
     * Insert assets into registry.
     *
     * @param {*} assets - Assets to insert.
     * @private
     */
    private _parseAssets;
    /**
     * Start the application. This function does the following:
     *
     * 1. Fires an event on the application named 'start'
     * 2. Calls initialize for all components on entities in the hierarchy
     * 3. Fires an event on the application named 'initialize'
     * 4. Calls postInitialize for all components on entities in the hierarchy
     * 5. Fires an event on the application named 'postinitialize'
     * 6. Starts executing the main loop of the application
     *
     * This function is called internally by PlayCanvas applications made in the Editor but you
     * will need to call start yourself if you are using the engine stand-alone.
     *
     * @example
     * app.start();
     */
    start(): void;
    _alreadyStarted: boolean;
    /**
     * Update all input devices managed by the application.
     *
     * @param {number} dt - The time in seconds since the last update.
     * @private
     */
    private inputUpdate;
    /**
     * Update the application. This function will call the update functions and then the postUpdate
     * functions of all enabled components. It will then update the current state of all connected
     * input devices. This function is called internally in the application's main loop and does
     * not need to be called explicitly.
     *
     * @param {number} dt - The time delta in seconds since the last frame.
     */
    update(dt: number): void;
    /**
     * Render the application's scene. More specifically, the scene's {@link LayerComposition} is
     * rendered. This function is called internally in the application's main loop and does not
     * need to be called explicitly.
     *
     * @ignore
     */
    render(): void;
    renderComposition(layerComposition: any): void;
    /**
     * @param {number} now - The timestamp passed to the requestAnimationFrame callback.
     * @param {number} dt - The time delta in seconds since the last frame. This is subject to the
     * application's time scale and max delta values.
     * @param {number} ms - The time in milliseconds since the last frame.
     * @private
     */
    private _fillFrameStatsBasic;
    /** @private */
    private _fillFrameStats;
    /**
     * Controls how the canvas fills the window and resizes when the window changes.
     *
     * @param {string} mode - The mode to use when setting the size of the canvas. Can be:
     *
     * - {@link FILLMODE_NONE}: the canvas will always match the size provided.
     * - {@link FILLMODE_FILL_WINDOW}: the canvas will simply fill the window, changing aspect ratio.
     * - {@link FILLMODE_KEEP_ASPECT}: the canvas will grow to fill the window as best it can while
     * maintaining the aspect ratio.
     *
     * @param {number} [width] - The width of the canvas (only used when mode is {@link FILLMODE_NONE}).
     * @param {number} [height] - The height of the canvas (only used when mode is {@link FILLMODE_NONE}).
     */
    setCanvasFillMode(mode: string, width?: number, height?: number): void;
    /**
     * Change the resolution of the canvas, and set the way it behaves when the window is resized.
     *
     * @param {string} mode - The mode to use when setting the resolution. Can be:
     *
     * - {@link RESOLUTION_AUTO}: if width and height are not provided, canvas will be resized to
     * match canvas client size.
     * - {@link RESOLUTION_FIXED}: resolution of canvas will be fixed.
     *
     * @param {number} [width] - The horizontal resolution, optional in AUTO mode, if not provided
     * canvas clientWidth is used.
     * @param {number} [height] - The vertical resolution, optional in AUTO mode, if not provided
     * canvas clientHeight is used.
     */
    setCanvasResolution(mode: string, width?: number, height?: number): void;
    /**
     * Queries the visibility of the window or tab in which the application is running.
     *
     * @returns {boolean} True if the application is not visible and false otherwise.
     */
    isHidden(): boolean;
    /**
     * Called when the visibility state of the current tab/window changes.
     *
     * @private
     */
    private onVisibilityChange;
    /**
     * Resize the application's canvas element in line with the current fill mode.
     *
     * - In {@link FILLMODE_KEEP_ASPECT} mode, the canvas will grow to fill the window as best it
     * can while maintaining the aspect ratio.
     * - In {@link FILLMODE_FILL_WINDOW} mode, the canvas will simply fill the window, changing
     * aspect ratio.
     * - In {@link FILLMODE_NONE} mode, the canvas will always match the size provided.
     *
     * @param {number} [width] - The width of the canvas. Only used if current fill mode is {@link FILLMODE_NONE}.
     * @param {number} [height] - The height of the canvas. Only used if current fill mode is {@link FILLMODE_NONE}.
     * @returns {object} A object containing the values calculated to use as width and height.
     */
    resizeCanvas(width?: number, height?: number): object;
    /**
     * Updates the {@link GraphicsDevice} canvas size to match the canvas size on the document
     * page. It is recommended to call this function when the canvas size changes (e.g on window
     * resize and orientation change events) so that the canvas resolution is immediately updated.
     */
    updateCanvasSize(): void;
    /**
     * Event handler called when all code libraries have been loaded. Code libraries are passed
     * into the constructor of the Application and the application won't start running or load
     * packs until all libraries have been loaded.
     *
     * @private
     */
    private onLibrariesLoaded;
    /**
     * Apply scene settings to the current scene. Useful when your scene settings are parsed or
     * generated from a non-URL source.
     *
     * @param {object} settings - The scene settings to be applied.
     * @param {object} settings.physics - The physics settings to be applied.
     * @param {number[]} settings.physics.gravity - The world space vector representing global
     * gravity in the physics simulation. Must be a fixed size array with three number elements,
     * corresponding to each axis [ X, Y, Z ].
     * @param {object} settings.render - The rendering settings to be applied.
     * @param {number[]} settings.render.global_ambient - The color of the scene's ambient light.
     * Must be a fixed size array with three number elements, corresponding to each color channel
     * [ R, G, B ].
     * @param {string} settings.render.fog - The type of fog used by the scene. Can be:
     *
     * - {@link FOG_NONE}
     * - {@link FOG_LINEAR}
     * - {@link FOG_EXP}
     * - {@link FOG_EXP2}
     *
     * @param {number[]} settings.render.fog_color - The color of the fog (if enabled). Must be a
     * fixed size array with three number elements, corresponding to each color channel [ R, G, B ].
     * @param {number} settings.render.fog_density - The density of the fog (if enabled). This
     * property is only valid if the fog property is set to {@link FOG_EXP} or {@link FOG_EXP2}.
     * @param {number} settings.render.fog_start - The distance from the viewpoint where linear fog
     * begins. This property is only valid if the fog property is set to {@link FOG_LINEAR}.
     * @param {number} settings.render.fog_end - The distance from the viewpoint where linear fog
     * reaches its maximum. This property is only valid if the fog property is set to {@link FOG_LINEAR}.
     * @param {number} settings.render.gamma_correction - The gamma correction to apply when
     * rendering the scene. Can be:
     *
     * - {@link GAMMA_NONE}
     * - {@link GAMMA_SRGB}
     *
     * @param {number} settings.render.tonemapping - The tonemapping transform to apply when
     * writing fragments to the frame buffer. Can be:
     *
     * - {@link TONEMAP_LINEAR}
     * - {@link TONEMAP_FILMIC}
     * - {@link TONEMAP_HEJL}
     * - {@link TONEMAP_ACES}
     * - {@link TONEMAP_ACES2}
     * - {@link TONEMAP_NEUTRAL}
     *
     * @param {number} settings.render.exposure - The exposure value tweaks the overall brightness
     * of the scene.
     * @param {number|null} [settings.render.skybox] - The asset ID of the cube map texture to be
     * used as the scene's skybox. Defaults to null.
     * @param {number} settings.render.skyboxIntensity - Multiplier for skybox intensity.
     * @param {number} settings.render.skyboxLuminance - Lux (lm/m^2) value for skybox intensity when physical light units are enabled.
     * @param {number} settings.render.skyboxMip - The mip level of the skybox to be displayed.
     * Only valid for prefiltered cubemap skyboxes.
     * @param {number[]} settings.render.skyboxRotation - Rotation of skybox.
     * @param {number} settings.render.lightmapSizeMultiplier - The lightmap resolution multiplier.
     * @param {number} settings.render.lightmapMaxResolution - The maximum lightmap resolution.
     * @param {number} settings.render.lightmapMode - The lightmap baking mode. Can be:
     *
     * - {@link BAKE_COLOR}: single color lightmap
     * - {@link BAKE_COLORDIR}: single color lightmap + dominant light direction (used for bump/specular)
     *
     * @param {boolean} settings.render.ambientBake - Enable baking ambient light into lightmaps.
     * @param {number} settings.render.ambientBakeNumSamples - Number of samples to use when baking ambient light.
     * @param {number} settings.render.ambientBakeSpherePart - How much of the sphere to include when baking ambient light.
     * @param {number} settings.render.ambientBakeOcclusionBrightness - Brightness of the baked ambient occlusion.
     * @param {number} settings.render.ambientBakeOcclusionContrast - Contrast of the baked ambient occlusion.
     * @param {number} settings.render.ambientLuminance - Lux (lm/m^2) value for ambient light intensity.
     *
     * @param {boolean} settings.render.clusteredLightingEnabled - Enable clustered lighting.
     * @param {boolean} settings.render.lightingShadowsEnabled - If set to true, the clustered lighting will support shadows.
     * @param {boolean} settings.render.lightingCookiesEnabled - If set to true, the clustered lighting will support cookie textures.
     * @param {boolean} settings.render.lightingAreaLightsEnabled - If set to true, the clustered lighting will support area lights.
     * @param {number} settings.render.lightingShadowAtlasResolution - Resolution of the atlas texture storing all non-directional shadow textures.
     * @param {number} settings.render.lightingCookieAtlasResolution - Resolution of the atlas texture storing all non-directional cookie textures.
     * @param {number} settings.render.lightingMaxLightsPerCell - Maximum number of lights a cell can store.
     * @param {number} settings.render.lightingShadowType - The type of shadow filtering used by all shadows. Can be:
     *
     * - {@link SHADOW_PCF1_32F}
     * - {@link SHADOW_PCF3_32F}
     * - {@link SHADOW_PCF5_32F}
     * - {@link SHADOW_PCF1_16F}
     * - {@link SHADOW_PCF3_16F}
     * - {@link SHADOW_PCF5_16F}
     *
     * @param {Vec3} settings.render.lightingCells - Number of cells along each world space axis the space containing lights
     * is subdivided into.
     *
     * Only lights with bakeDir=true will be used for generating the dominant light direction.
     * @example
     *
     * const settings = {
     *     physics: {
     *         gravity: [0, -9.8, 0]
     *     },
     *     render: {
     *         fog_end: 1000,
     *         tonemapping: 0,
     *         skybox: null,
     *         fog_density: 0.01,
     *         gamma_correction: 1,
     *         exposure: 1,
     *         fog_start: 1,
     *         global_ambient: [0, 0, 0],
     *         skyboxIntensity: 1,
     *         skyboxRotation: [0, 0, 0],
     *         fog_color: [0, 0, 0],
     *         lightmapMode: 1,
     *         fog: 'none',
     *         lightmapMaxResolution: 2048,
     *         skyboxMip: 2,
     *         lightmapSizeMultiplier: 16
     *     }
     * };
     * app.applySceneSettings(settings);
     */
    applySceneSettings(settings: {
        physics: {
            gravity: number[];
        };
        render: {
            global_ambient: number[];
            fog: string;
            fog_color: number[];
            fog_density: number;
            fog_start: number;
            fog_end: number;
            gamma_correction: number;
            tonemapping: number;
            exposure: number;
            skybox?: number | null;
            skyboxIntensity: number;
            skyboxLuminance: number;
            skyboxMip: number;
            skyboxRotation: number[];
            lightmapSizeMultiplier: number;
            lightmapMaxResolution: number;
            lightmapMode: number;
            ambientBake: boolean;
            ambientBakeNumSamples: number;
            ambientBakeSpherePart: number;
            ambientBakeOcclusionBrightness: number;
            ambientBakeOcclusionContrast: number;
            ambientLuminance: number;
            clusteredLightingEnabled: boolean;
            lightingShadowsEnabled: boolean;
            lightingCookiesEnabled: boolean;
            lightingAreaLightsEnabled: boolean;
            lightingShadowAtlasResolution: number;
            lightingCookieAtlasResolution: number;
            lightingMaxLightsPerCell: number;
            lightingShadowType: number;
            lightingCells: Vec3;
        };
    }): void;
    /**
     * Sets the area light LUT tables for this app.
     *
     * @param {number[]} ltcMat1 - LUT table of type `array` to be set.
     * @param {number[]} ltcMat2 - LUT table of type `array` to be set.
     */
    setAreaLightLuts(ltcMat1: number[], ltcMat2: number[]): void;
    /**
     * Sets the skybox asset to current scene, and subscribes to asset load/change events.
     *
     * @param {Asset} asset - Asset of type `skybox` to be set to, or null to remove skybox.
     */
    setSkybox(asset: Asset): void;
    /** @private */
    private _firstBake;
    /** @private */
    private _firstBatch;
    /**
     * Provide an opportunity to modify the timestamp supplied by requestAnimationFrame.
     *
     * @param {number} [timestamp] - The timestamp supplied by requestAnimationFrame.
     * @returns {number|undefined} The modified timestamp.
     * @ignore
     */
    _processTimestamp(timestamp?: number): number | undefined;
    /**
     * Draws a single line. Line start and end coordinates are specified in world space. The line
     * will be flat-shaded with the specified color.
     *
     * @param {Vec3} start - The start world space coordinate of the line.
     * @param {Vec3} end - The end world space coordinate of the line.
     * @param {Color} [color] - The color of the line. It defaults to white if not specified.
     * @param {boolean} [depthTest] - Specifies if the line is depth tested against the depth
     * buffer. Defaults to true.
     * @param {Layer} [layer] - The layer to render the line into. Defaults to {@link LAYERID_IMMEDIATE}.
     * @example
     * // Render a 1-unit long white line
     * const start = new pc.Vec3(0, 0, 0);
     * const end = new pc.Vec3(1, 0, 0);
     * app.drawLine(start, end);
     * @example
     * // Render a 1-unit long red line which is not depth tested and renders on top of other geometry
     * const start = new pc.Vec3(0, 0, 0);
     * const end = new pc.Vec3(1, 0, 0);
     * app.drawLine(start, end, pc.Color.RED, false);
     * @example
     * // Render a 1-unit long white line into the world layer
     * const start = new pc.Vec3(0, 0, 0);
     * const end = new pc.Vec3(1, 0, 0);
     * const worldLayer = app.scene.layers.getLayerById(pc.LAYERID_WORLD);
     * app.drawLine(start, end, pc.Color.WHITE, true, worldLayer);
     */
    drawLine(start: Vec3, end: Vec3, color?: Color, depthTest?: boolean, layer?: Layer): void;
    /**
     * Renders an arbitrary number of discrete line segments. The lines are not connected by each
     * subsequent point in the array. Instead, they are individual segments specified by two
     * points. Therefore, the lengths of the supplied position and color arrays must be the same
     * and also must be a multiple of 2. The colors of the ends of each line segment will be
     * interpolated along the length of each line.
     *
     * @param {Vec3[]} positions - An array of points to draw lines between. The length of the
     * array must be a multiple of 2.
     * @param {Color[] | Color} colors - An array of colors or a single color. If an array is
     * specified, this must be the same length as the position array. The length of the array
     * must also be a multiple of 2.
     * @param {boolean} [depthTest] - Specifies if the lines are depth tested against the depth
     * buffer. Defaults to true.
     * @param {Layer} [layer] - The layer to render the lines into. Defaults to {@link LAYERID_IMMEDIATE}.
     * @example
     * // Render a single line, with unique colors for each point
     * const start = new pc.Vec3(0, 0, 0);
     * const end = new pc.Vec3(1, 0, 0);
     * app.drawLines([start, end], [pc.Color.RED, pc.Color.WHITE]);
     * @example
     * // Render 2 discrete line segments
     * const points = [
     *     // Line 1
     *     new pc.Vec3(0, 0, 0),
     *     new pc.Vec3(1, 0, 0),
     *     // Line 2
     *     new pc.Vec3(1, 1, 0),
     *     new pc.Vec3(1, 1, 1)
     * ];
     * const colors = [
     *     // Line 1
     *     pc.Color.RED,
     *     pc.Color.YELLOW,
     *     // Line 2
     *     pc.Color.CYAN,
     *     pc.Color.BLUE
     * ];
     * app.drawLines(points, colors);
     */
    drawLines(positions: Vec3[], colors: Color[] | Color, depthTest?: boolean, layer?: Layer): void;
    /**
     * Renders an arbitrary number of discrete line segments. The lines are not connected by each
     * subsequent point in the array. Instead, they are individual segments specified by two
     * points.
     *
     * @param {number[]} positions - An array of points to draw lines between. Each point is
     * represented by 3 numbers - x, y and z coordinate.
     * @param {number[]|Color} colors - A single color for all lines, or an array of colors to color
     * the lines. If an array is specified, number of colors it stores must match the number of
     * positions provided.
     * @param {boolean} [depthTest] - Specifies if the lines are depth tested against the depth
     * buffer. Defaults to true.
     * @param {Layer} [layer] - The layer to render the lines into. Defaults to {@link LAYERID_IMMEDIATE}.
     * @example
     * // Render 2 discrete line segments
     * const points = [
     *     // Line 1
     *     0, 0, 0,
     *     1, 0, 0,
     *     // Line 2
     *     1, 1, 0,
     *     1, 1, 1
     * ];
     * const colors = [
     *     // Line 1
     *     1, 0, 0, 1,  // red
     *     0, 1, 0, 1,  // green
     *     // Line 2
     *     0, 0, 1, 1,  // blue
     *     1, 1, 1, 1   // white
     * ];
     * app.drawLineArrays(points, colors);
     */
    drawLineArrays(positions: number[], colors: number[] | Color, depthTest?: boolean, layer?: Layer): void;
    /**
     * Draws a wireframe sphere with center, radius and color.
     *
     * @param {Vec3} center - The center of the sphere.
     * @param {number} radius - The radius of the sphere.
     * @param {Color} [color] - The color of the sphere. It defaults to white if not specified.
     * @param {number} [segments] - Number of line segments used to render the circles forming the
     * sphere. Defaults to 20.
     * @param {boolean} [depthTest] - Specifies if the sphere lines are depth tested against the
     * depth buffer. Defaults to true.
     * @param {Layer} [layer] - The layer to render the sphere into. Defaults to {@link LAYERID_IMMEDIATE}.
     * @example
     * // Render a red wire sphere with radius of 1
     * const center = new pc.Vec3(0, 0, 0);
     * app.drawWireSphere(center, 1.0, pc.Color.RED);
     * @ignore
     */
    drawWireSphere(center: Vec3, radius: number, color?: Color, segments?: number, depthTest?: boolean, layer?: Layer): void;
    /**
     * Draws a wireframe axis aligned box specified by min and max points and color.
     *
     * @param {Vec3} minPoint - The min corner point of the box.
     * @param {Vec3} maxPoint - The max corner point of the box.
     * @param {Color} [color] - The color of the sphere. It defaults to white if not specified.
     * @param {boolean} [depthTest] - Specifies if the sphere lines are depth tested against the
     * depth buffer. Defaults to true.
     * @param {Layer} [layer] - The layer to render the sphere into. Defaults to {@link LAYERID_IMMEDIATE}.
     * @param {Mat4} [mat] - Matrix to transform the box before rendering.
     * @example
     * // Render a red wire aligned box
     * const min = new pc.Vec3(-1, -1, -1);
     * const max = new pc.Vec3(1, 1, 1);
     * app.drawWireAlignedBox(min, max, pc.Color.RED);
     * @ignore
     */
    drawWireAlignedBox(minPoint: Vec3, maxPoint: Vec3, color?: Color, depthTest?: boolean, layer?: Layer, mat?: Mat4): void;
    /**
     * Draw meshInstance at this frame
     *
     * @param {MeshInstance} meshInstance - The mesh instance
     * to draw.
     * @param {Layer} [layer] - The layer to render the mesh instance into. Defaults to
     * {@link LAYERID_IMMEDIATE}.
     * @ignore
     */
    drawMeshInstance(meshInstance: MeshInstance, layer?: Layer): void;
    /**
     * Draw mesh at this frame.
     *
     * @param {Mesh} mesh - The mesh to draw.
     * @param {Material} material - The material to use to render the mesh.
     * @param {Mat4} matrix - The matrix to use to render the mesh.
     * @param {Layer} [layer] - The layer to render the mesh into. Defaults to {@link LAYERID_IMMEDIATE}.
     * @ignore
     */
    drawMesh(mesh: Mesh, material: Material, matrix: Mat4, layer?: Layer): void;
    /**
     * Draw quad of size [-0.5, 0.5] at this frame.
     *
     * @param {Mat4} matrix - The matrix to use to render the quad.
     * @param {Material} material - The material to use to render the quad.
     * @param {Layer} [layer] - The layer to render the quad into. Defaults to {@link LAYERID_IMMEDIATE}.
     * @ignore
     */
    drawQuad(matrix: Mat4, material: Material, layer?: Layer): void;
    /**
     * Draws a texture at [x, y] position on screen, with size [width, height]. The origin of the
     * screen is top-left [0, 0]. Coordinates and sizes are in projected space (-1 .. 1).
     *
     * @param {number} x - The x coordinate on the screen of the center of the texture.
     * Should be in the range [-1, 1].
     * @param {number} y - The y coordinate on the screen of the center of the texture.
     * Should be in the range [-1, 1].
     * @param {number} width - The width of the rectangle of the rendered texture. Should be in the
     * range [0, 2].
     * @param {number} height - The height of the rectangle of the rendered texture. Should be in
     * the range [0, 2].
     * @param {Texture} texture - The texture to render.
     * @param {Material} material - The material used when rendering the texture.
     * @param {Layer} [layer] - The layer to render the texture into. Defaults to {@link LAYERID_IMMEDIATE}.
     * @param {boolean} [filterable] - Indicate if the texture can be sampled using filtering.
     * Passing false uses unfiltered sampling, allowing a depth texture to be sampled on WebGPU.
     * Defaults to true.
     * @ignore
     */
    drawTexture(x: number, y: number, width: number, height: number, texture: Texture, material: Material, layer?: Layer, filterable?: boolean): void;
    /**
     * Draws a depth texture at [x, y] position on screen, with size [width, height]. The origin of
     * the screen is top-left [0, 0]. Coordinates and sizes are in projected space (-1 .. 1).
     *
     * @param {number} x - The x coordinate on the screen of the center of the texture.
     * Should be in the range [-1, 1].
     * @param {number} y - The y coordinate on the screen of the center of the texture.
     * Should be in the range [-1, 1].
     * @param {number} width - The width of the rectangle of the rendered texture. Should be in the
     * range [0, 2].
     * @param {number} height - The height of the rectangle of the rendered texture. Should be in
     * the range [0, 2].
     * @param {Layer} [layer] - The layer to render the texture into. Defaults to {@link LAYERID_IMMEDIATE}.
     * @ignore
     */
    drawDepthTexture(x: number, y: number, width: number, height: number, layer?: Layer): void;
    /**
     * Destroys application and removes all event listeners at the end of the current engine frame
     * update. However, if called outside of the engine frame update, calling destroy() will
     * destroy the application immediately.
     *
     * @example
     * app.destroy();
     */
    destroy(): void;
    controller: any;
    context: any;
    /**
     * Get entity from the index by guid.
     *
     * @param {string} guid - The GUID to search for.
     * @returns {Entity} The Entity with the GUID or null.
     * @ignore
     */
    getEntityFromIndex(guid: string): Entity;
    /**
     * @param {Scene} scene - The scene.
     * @private
     */
    private _registerSceneImmediate;
}
import { EventHandler } from '../core/event-handler.js';
import { Entity } from './entity.js';
import { FrameGraph } from '../scene/frame-graph.js';
import { ForwardRenderer } from '../scene/renderer/forward-renderer.js';
import { ApplicationStats } from './stats.js';
import type { GraphicsDevice } from '../platform/graphics/graphics-device.js';
import { Scene } from '../scene/scene.js';
import type { Lightmapper } from './lightmapper/lightmapper.js';
import { ResourceLoader } from './handlers/loader.js';
import { AssetRegistry } from './asset/asset-registry.js';
import { BundleRegistry } from './bundle/bundle-registry.js';
import { SceneRegistry } from './scene-registry.js';
import { ScriptRegistry } from './script/script-registry.js';
import { ComponentSystemRegistry } from './components/registry.js';
import { I18n } from './i18n/i18n.js';
import type { Keyboard } from '../platform/input/keyboard.js';
import type { Mouse } from '../platform/input/mouse.js';
import type { TouchDevice } from '../platform/input/touch-device.js';
import type { GamePads } from '../platform/input/game-pads.js';
import type { ElementInput } from './input/element-input.js';
import type { XrManager } from './xr/xr-manager.js';
import type { AppOptions } from './app-options.js';
import { Layer } from '../scene/layer.js';
import type { SoundManager } from '../platform/sound/manager.js';
import type { BatchManager } from '../scene/batching/batch-manager.js';
import { Vec3 } from '../core/math/vec3.js';
import { Asset } from './asset/asset.js';
import { Color } from '../core/math/color.js';
import { Mat4 } from '../core/math/mat4.js';
import type { MeshInstance } from '../scene/mesh-instance.js';
import type { Mesh } from '../scene/mesh.js';
import type { Material } from '../scene/materials/material.js';
import type { Texture } from '../platform/graphics/texture.js';