Each party shall file with the court and serve upon the other party within the time prescribed by rule any affidavits and points and authorities intended to be relied upon at the hearing. At the hearing, the court shall make its determinations upon the basis of the pleadings and other papers in the record; but, upon good cause shown, the court may receive and consider additional evidence and authority produced at the hearing or may continue the hearing for the production of such additional evidence, oral or documentary, or the filing of other affidavits or points and authorities.