export declare class Vec3 extends Array<number> {
    constant: number;
    constructor(x?: number, y?: number, z?: number);
    get x(): number;
    get y(): number;
    get z(): number;
    set x(v: number);
    set y(v: number);
    set z(v: number);
    set(x: number | Array<number>, y?: number | number[], z?: number | number[]): this;
    copy(v: any): this;
    add(va: any, vb?: Vec3): this;
    sub(va: any, vb?: Vec3): this;
    multiply(v: any): this;
    divide(v: any): this;
    inverse(v?: this): this;
    len(): number;
    distance(v?: Vec3): number;
    squaredLen(): number;
    squaredDistance(v?: Vec3): number;
    negate(v?: this): this;
    cross(va: any, vb?: any): this;
    scale(v: any): this;
    normalize(): this;
    dot(v: any): number;
    equals(v: any): boolean;
    applyMatrix4(mat4: any): this;
    scaleRotateMatrix4(mat4: any): this;
    applyQuaternion(q: any): this;
    angle(v: any): number;
    lerp(v: any, t: any): this;
    clone(): Vec3;
    fromArray(a: any, o?: number): this;
    toArray(a?: Float32Array | Array<number>, o?: number): number[] | Float32Array;
    transformDirection(mat4: any): this;
}