mt01cc.f

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!                   *****************
                    SUBROUTINE mt01cc
!                   *****************
!
     &( a11 , a12 , a13 , a14 , a15 , a16 ,
     &        a22 , a23 , a24 , a25 , a26 ,
     &              a33 , a34 , a35 , a36 ,
     &                    a44 , a45 , a46 ,
     &                          a55 , a56 ,
     &                                a66 ,
     &  xmul,surfac,nelem,nelmax )
!
!***********************************************************************
! BIEF   V6P1                                   21/08/2010
!***********************************************************************
!
!brief    BUILDS THE MASS MATRIX FOR P2 TRIANGLES.
!
!warning  THE JACOBIAN MUST BE POSITIVE
!
!history  ALGIANE FROEHLY (MATMECA)
!+        29/02/08
!+        V5P9
!+
!
!history  N.DURAND (HRW), S.E.BOURBAN (HRW)
!+        13/07/2010
!+        V6P0
!+   Translation of French comments within the FORTRAN sources into
!+   English comments
!
!history  N.DURAND (HRW), S.E.BOURBAN (HRW)
!+        21/08/2010
!+        V6P0
!+   Creation of DOXYGEN tags for automated documentation and
!+   cross-referencing of the FORTRAN sources
!
!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!| A11            |<--| ELEMENTS OF MATRIX
!| A12            |<--| ELEMENTS OF MATRIX
!| A13            |<--| ELEMENTS OF MATRIX
!| A14            |<--| ELEMENTS OF MATRIX
!| A15            |<--| ELEMENTS OF MATRIX
!| A16            |<--| ELEMENTS OF MATRIX
!| A22            |<--| ELEMENTS OF MATRIX
!| A23            |<--| ELEMENTS OF MATRIX
!| A24            |<--| ELEMENTS OF MATRIX
!| A25            |<--| ELEMENTS OF MATRIX
!| A26            |<--| ELEMENTS OF MATRIX
!| A33            |<--| ELEMENTS OF MATRIX
!| A34            |<--| ELEMENTS OF MATRIX
!| A35            |<--| ELEMENTS OF MATRIX
!| A36            |<--| ELEMENTS OF MATRIX
!| A44            |<--| ELEMENTS OF MATRIX
!| A45            |<--| ELEMENTS OF MATRIX
!| A46            |<--| ELEMENTS OF MATRIX
!| A55            |<--| ELEMENTS OF MATRIX
!| A56            |<--| ELEMENTS OF MATRIX
!| A66            |<--| ELEMENTS OF MATRIX
!| NELEM          |-->| NUMBER OF ELEMENTS
!| NELMAX         |-->| MAXIMUM NUMBER OF ELEMENTS
!| SURFAC         |-->| AREA OF TRIANGLES
!| XMUL           |-->| MULTIPLICATION FACTOR
!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!
      USE bief !, EX_MT01CC => MT01CC
!
      USE declarations_special
      IMPLICIT NONE
!
!+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
!
      INTEGER, INTENT(IN) :: NELEM,NELMAX
!
      DOUBLE PRECISION, INTENT(INOUT) :: A11(*),A12(*),A13(*),A14(*)
      DOUBLE PRECISION, INTENT(INOUT) :: A15(*),A16(*)
      DOUBLE PRECISION, INTENT(INOUT) ::        A22(*),A23(*),A24(*)
      DOUBLE PRECISION, INTENT(INOUT) :: A25(*),A26(*)
      DOUBLE PRECISION, INTENT(INOUT) :: A33(*),A34(*),A35(*),A36(*)
      DOUBLE PRECISION, INTENT(INOUT) :: A44(*),A45(*),A46(*)
      DOUBLE PRECISION, INTENT(INOUT) :: A55(*),A56(*),A66(*)
!
      DOUBLE PRECISION, INTENT(IN) :: XMUL
!
      DOUBLE PRECISION, INTENT(IN) :: SURFAC(nelmax)
!
!+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
!
!     DECLARATIONS SPECIFIC TO THIS SUBROUTINE
!
      INTEGER IELEM
      DOUBLE PRECISION XSUR180
!
!=======================================================================
!
      xsur180 = xmul / 180.d0
!
      DO ielem = 1 , nelem
!
!  EXTRADIAGONAL TERMS
!
        a12(ielem) = - surfac(ielem) * xsur180
        a13(ielem) =          a12(ielem)
        a14(ielem) =   0.d0
        a15(ielem) =   4.d0 * a12(ielem)
        a16(ielem) =   0.d0
        a23(ielem) =          a12(ielem)
        a24(ielem) =   0.d0
        a25(ielem) =   0.d0
        a26(ielem) =          a15(ielem)
        a34(ielem) =          a15(ielem)
        a35(ielem) =   0.d0
        a36(ielem) =   0.d0
        a45(ielem) = - 4.d0 * a15(ielem)
        a46(ielem) =          a45(ielem)
        a56(ielem) =          a45(ielem)
!
!  DIAGONAL TERMS
!
        a11(ielem) = - 6.d0 * a12(ielem)
        a22(ielem) =          a11(ielem)
        a33(ielem) =          a11(ielem)
        a44(ielem) = - 8.d0 * a15(ielem)
        a55(ielem) =          a44(ielem)
        a66(ielem) =          a44(ielem)
!
      ENDDO
!
!-----------------------------------------------------------------------
!
      RETURN
      END