import { Plane, Vector3, Curve3, ILoadingScreen } from "@babylonjs/core";
export declare function initArray<T>(length: number, initializer: (i: number) => T): T[];
export declare function range(start: number, end: number, step: number): number[];
export declare function linspace(start: number, end: number, div: number): number[];
export declare function objectFlip(obj: any): any;
export declare const rangeCap: (v: number, min: number, max: number) => number;
export declare const remapRange: (v: number, src_low: number, src_high: number, dst_low: number, dst_high: number) => number;
export declare const remapRangeWithCap: (v: number, src_low: number, src_high: number, dst_low: number, dst_high: number) => number;
export declare const remapRangeNoCap: (v: number, src_low: number, src_high: number, dst_low: number, dst_high: number) => number;
export declare function validVector3(v: Vector3): boolean;
export type KeysMatching<T, V> = {
    [K in keyof T]-?: T[K] extends V ? K : never;
}[keyof T];
export type IfEquals<X, Y, A = X, B = never> = (<T>() => T extends X ? 1 : 2) extends (<T>() => T extends Y ? 1 : 2) ? A : B;
export type ReadonlyKeys<T> = {
    [P in keyof T]-?: IfEquals<{
        [Q in P]: T[P];
    }, {
        -readonly [Q in P]: T[P];
    }, never, P>;
}[keyof T];
export declare function setEqual<T>(as: Set<T>, bs: Set<T>): boolean;
export declare function projectVectorOnPlane(projPlane: Plane, vec: Vector3): Vector3;
export declare function round(value: number, precision: number): number;
/**
 * Simple fixed length FIFO queue.
 */
export declare class fixedLengthQueue<T> {
    readonly size: number;
    private _values;
    get values(): T[];
    constructor(size: number);
    push(v: T): void;
    concat(arr: T[]): void;
    pop(): T | undefined;
    first(): T | null;
    last(): T | null;
    reset(): void;
    length(): number;
}
export declare function findPoint(curve: Curve3, x: number, eps?: number): number;
export declare const LR: string[];
export declare class CustomLoadingScreen implements ILoadingScreen {
    private readonly renderingCanvas;
    private loadingDiv;
    loadingUIBackgroundColor: string;
    loadingUIText: string;
    constructor(renderingCanvas: HTMLCanvasElement, loadingDiv: HTMLDivElement);
    displayLoadingUI(): void;
    hideLoadingUI(): void;
}
export declare function pointLineDistance(point: Vector3, lineEndA: Vector3, lineEndB: Vector3): number;