export declare function assert(condition: boolean, msg: string | Function): void;
export declare function format(value: number, decimals?: number): string;
export declare function bind(id: string, initialValue: any, onInput: Function, suffix?: string, decimals?: number): void;
export declare function setOptions(obj: any, options: any): void;
export declare function getElement(selector: any): Element;
export declare function clamp(value: number, min: number | null, max: number | null): number;
export declare function isNumber(val: any): boolean;
export interface IPoint {
    x: number;
    y: number;
    z?: number;
}
export declare class Point implements IPoint {
    x: number;
    y: number;
    z: number;
    constructor(x?: number, y?: number, z?: number);
    static clone(p: IPoint): IPoint;
    static copy(dst: IPoint, src: IPoint): IPoint;
    static distance(p1: IPoint, p2: IPoint): number;
    static interpolate(p1: IPoint, p2: IPoint, t: number): IPoint;
    static angle(p1: IPoint, p2: IPoint, radians?: boolean): number;
}