import { Quaternion } from "./Quaternion";
import type { XMLNode } from 'xmlbuilder';
export declare class Vector4 {
    x: number;
    y: number;
    z: number;
    w: number;
    constructor(buf?: Buffer | number[] | Vector4 | number, pos?: number, double?: boolean | number, w?: number);
    static getXML(doc: XMLNode, v?: Vector4): void;
    static getZero(): Vector4;
    writeToBuffer(buf: Buffer, pos: number, double?: boolean): void;
    toString(): string;
    getBuffer(double?: boolean): Buffer;
    compareApprox(vec: Vector4): boolean;
    toArray(): number[];
    equals(vec: Vector4, epsilon?: number): boolean;
    dot(vec: Vector4): number;
    distance(vec: Vector4): number;
    squaredDistance(vec: Vector4): number;
    direction(vec: Vector4): Vector4;
    mix(vec: Vector4, t: number): Vector4;
    sum(vec: Vector4): Vector4;
    difference(vec: Vector4): Vector4;
    product(vec: Vector4): Vector4;
    quotient(vec: Vector4): Vector4;
    reset(): void;
    copy(): Vector4;
    toJSON(): object;
    negate(): Vector4;
    length(): number;
    squaredLength(): number;
    add(vec: Vector4): this;
    subtract(vec: Vector4): this;
    multiply(value: number | Vector4): this;
    divide(value: number | Vector4): this;
    scale(scalar: number): this;
    normalize(): this;
    toQuaternion(): Quaternion;
}