Multiply the components of this Vector3d by the given scalar values and store the result in <code>this</code>.
@param x
the x component to multiply this vector by
@param y
the y component to multiply this vector by
@param z
the z component to multiply this vector by
@return this
Multiply the components of this Vector3d by the given scalar values and store the result in <code>this</code>.
@param x the x component to multiply this vector by @param y the y component to multiply this vector by @param z the z component to multiply this vector by @return this