multiplyVectors( a, b ) {

		this.x = a.x * b.x;
		this.y = a.y * b.y;
		this.z = a.z * b.z;

		return this;

	}
Multiplies the given vectors and stores the result in this instance.

@param {Vector3} a - The first vector.
@param {Vector3} b - The second vector.
@return {Vector3} A reference to this vector.