/** Spherical coordinate (radius, phi, theta). */
export declare class Spherical {
    #private;
    constructor(radius?: number, phi?: number, theta?: number);
    get radius(): number;
    set radius(value: number);
    get phi(): number;
    set phi(value: number);
    get theta(): number;
    set theta(value: number);
    set(radius: number, phi: number, theta: number): this;
    clone(): Spherical;
    copy(s: Spherical): this;
    /**
     * Restricts phi to [EPS, PI - EPS] to avoid singularities at poles.
     */
    makeSafe(): this;
    /** Sets from a Vector3 in Cartesian coordinates. */
    setFromVector3(v: {
        x: number;
        y: number;
        z: number;
    }): this;
    setFromCartesianCoords(x: number, y: number, z: number): this;
}
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