CDECK  ID>, HWULOR.

*CMZ :-        -26/04/91  11.11.56  by  Bryan Webber

*-- Author :    Giovanni Abbiendi & Luca Stanco

C-----------------------------------------------------------------------

      SUBROUTINE HWULOR (TRANSF,PI,PF)

C-----------------------------------------------------------------------

C     Makes the HWULOR transformation specified by TRANSF on the

C     quadrivector PI(5), giving PF(5).

C-----------------------------------------------------------------------

      DOUBLE PRECISION TRANSF(4,4),PI(5),PF(5)

      INTEGER I,J

      DO 1 I=1,5

        PF(I)=0.D0

    1 CONTINUE

      DO 3 I=1,4

       DO 2 J=1,4

         PF(I) = PF(I) + TRANSF(I,J) * PI(J)

    2  CONTINUE

    3 CONTINUE

      PF(5) = PI(5)

      RETURN

      END