/** 4D vector with x, y, z, w components. */
export declare class Vector4 {
    #private;
    /** Computes the dot product of the given components against a target vector. */
    static dot(x: number, y: number, z: number, w: number, target?: Vector4): number;
    constructor(x?: number, y?: number, z?: number, w?: number);
    get x(): number;
    set x(v: number);
    get y(): number;
    set y(v: number);
    get z(): number;
    set z(v: number);
    get w(): number;
    set w(v: number);
    get length(): number;
    get lengthSq(): number;
    clone(): Vector4;
    copy(v: Vector4): this;
    divScalar(s: number): this;
    fromArray(a: number[]): this;
    set(x: number, y: number, z: number, w: number): this;
    /** Normalizes this vector to unit length. */
    normalize(): this;
    [Symbol.iterator](): Generator<number>;
}
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