import ExtensionsRegistry from './extensions/Registry';
import type Accessor from './elements/Accessor';
import type BufferView from './elements/BufferView';
import type Buffer from './elements/Buffer';
import type Animation from './elements/Animation';
import type Node from './elements/Node';
import type { IMaterial } from './elements/Material';
import type Mesh from './elements/Mesh';
import type Skin from './elements/Skin';
import type Camera from './elements/Camera';
import NanoCamera from 'nanogl-camera';
import { GLContext } from 'nanogl/types';
import NanoglNode from 'nanogl-node';
import { ISemantics } from './Semantics';
import { IExtensionFactory } from './extensions/IExtension';
import GltfTypes from './types/GltfTypes';
import { AnyElement, ElementOfType } from './types/Elements';
import IRenderConfig from './IRenderConfig';
import Primitive from './elements/Primitive';
import Texture from './elements/Texture';
import DepthPass from 'nanogl-pbr/DepthPass';
import MeshRenderer from './renderer/MeshRenderer';
import { LightCollection } from './extensions/KHR_lights_punctual';
import { AbortSignal } from '@azure/abort-controller';
import type Scene from './elements/Scene';
/**
 * Collection of elements of a given type
 */
export declare class ElementCollection<T extends AnyElement = AnyElement> {
    /**
     * Array of elements order by specified index
     */
    indexed: T[];
    /**
     * Array of elements ordered by push order
     */
    list: T[];
    /**
     * Add an element to the collection
     * @param element Element to add
     * @param index Index of the element, if -1 or not specified, will not be pushed to indexed array
     */
    addElement(element: T, index?: number): void;
}
/**
 * Extras property of a Gltf (custom additional data that can be added to every gltf property).
 * Lights can be stored in the extras property of the Gltf with the KHR_lights_punctual extension.
 */
export declare type GltfExtras = {
    [key: string]: any;
} & {
    lights?: LightCollection;
};
/**
 * Gltf file representation
 */
export default class Gltf {
    /**
     * Static registry of activated extensions for all Gltf instances
     */
    private static _extensionsRegistry;
    /**
     * Static GLSL semantics' resolver for all Gltf instances
     */
    private static _semantics;
    /**
     * Static render config for all Gltf instances
     */
    private static _renderConfig;
    /**
     * Add an extension to the static Gltf's extensions registry
     * @param ext Extension to add
     */
    static addExtension(ext: IExtensionFactory): void;
    /**
     * Get the static Gltf's semantics resolver
     */
    static getSemantics(): ISemantics;
    /**
     * Set a custom static Gltf's semantics resolver
     * @param semantics Custom semantics resolver
     */
    static setSemantics(semantics: ISemantics): void;
    /**
     * Set the static Gltf's render config
     */
    static getRenderConfig(): IRenderConfig;
    /**
     * Get the static Gltf's extensions registry
     */
    static getExtensionsRegistry(): ExtensionsRegistry;
    /**
     * Array of all elements of this Gltf, unordered
     */
    private _elements;
    /**
     * Map of all elements of this Gltf, ordered in typed collections
     */
    private _collections;
    /**
     * Root node of this Gltf
     */
    readonly root: NanoglNode;
    /**
     * GL context of this Gltf
     */
    gl: GLContext;
    /**
     * Array of all renderables of this Gltf, created as MeshRenderer
     */
    renderables: MeshRenderer[];
    /**
     * Array of all cameras of this Gltf, created as Camera from nanogl-camera
     */
    cameraInstances: NanoCamera[];
    /**
     * Depth pass of this Gltf
     */
    depthPass: DepthPass;
    /**
     * Extras property of this Gltf (custom additional data that can be added to every gltf property)
     */
    extras: GltfExtras;
    constructor();
    /**
     * Get the Gltf ready to be used in a WebGL context.
     * Generally the first method called after loading the Gltf.
     * This will allocate all the needed textures to the GPU, create the renderables, cameras, initialize buffers for primitives,
     * and create Cameras from nanogl-camera.
     * @param gl GL context
     * @param abortSignal Abort signal if you want to be able to cancel the request at any time
     */
    allocate(gl: GLContext, abortSignal?: AbortSignal): Promise<void>;
    /**
     * Filter all gltf Nodes to get only the ones that are cameras, and create a Camera from nanogl-camera for each of them,
     * added as child of the Node, storing them in cameraInstances
     */
    createCameras(): void;
    get buffers(): Buffer[];
    get bufferViews(): BufferView[];
    get accessors(): Accessor[];
    get animations(): Animation[];
    get meshes(): Mesh[];
    get nodes(): Node[];
    get materials(): IMaterial[];
    get cameras(): Camera[];
    get skins(): Skin[];
    get primitives(): Primitive[];
    get textures(): Texture[];
    get scenes(): Scene[];
    /**
     * Get all elements of this Gltf, unordered and unfiltered
     */
    getAllElements(): AnyElement[];
    /**
     * Get element by his type and index
     * @param type Element's type
     * @param index Element's index
     */
    getElement<T extends GltfTypes>(type: T, index: number): ElementOfType<T>;
    /**
     * Get element by his type and name
     * @param type Element's type
     * @param name Element's name
     */
    getElementByName<T extends GltfTypes>(type: T, name: string): ElementOfType<T>;
    /**
     * Get all elements of a specific type with a specific name
     * @param type Elements' type
     * @param name Elements' name
     */
    getElementsByName<T extends GltfTypes>(type: T, name: string): ElementOfType<T>[];
    getNode(name: string): Node;
    getMesh(name: string): Mesh;
    getMaterial(name: string): IMaterial;
    getAnimation(name: string): Animation;
    getScene(name: string): Scene;
    /**
     * Get full collection of a specific type
     * @param type Type of targeted collection
     */
    private _getCollection;
    /**
     * Add an element to the Gltf
     * @param element Element to add
     * @param index Index of the element, if -1 or not specified, will not be pushed to indexed array (only the unordered one)
     */
    addElement(element: AnyElement, index?: number): void;
}