scale( s ) {

		for ( let i = 0; i < 9; i ++ ) {

			this.coefficients[ i ].multiplyScalar( s );

		}

		return this;

	}
Scales this SH by the given scale factor.

@param {number} s - The scale factor.
@return {SphericalHarmonics3} A reference to this spherical harmonics.