a3invdp_v.F

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!||====================================================================
!||    a3invdp_v   ../engine/source/elements/shell/coquez/a3invdp_v.F
!||--- called by ------------------------------------------------------
!||    czcorp5     ../engine/source/elements/shell/coquez/czcorp5.F
!||====================================================================
        SUBROUTINE a3invdp_v(D,DI,NEL,PLAT)
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include "implicit_f.inc"
 
#include "mvsiz_p.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
        INTEGER, INTENT(IN) :: NEL !< number of element of the group
        LOGICAL, DIMENSION(NEL), INTENT(INOUT) :: PLAT
        my_real, DIMENSION(MVSIZ,6), INTENT(IN) :: d(mvsiz,6)
        my_real, DIMENSION(MVSIZ,6), INTENT(INOUT) :: di(mvsiz,6)
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
        INTEGER :: I
        DOUBLE PRECISION :: ABC,XXYZ2,YYXZ2,ZZXY2,DETA
C-----------------------------------------------
        DO i=1,nel
            IF(.NOT.plat(i)) THEN
                abc = d(i,1)*d(i,2)*d(i,3)
                xxyz2 = d(i,1)*d(i,6)*d(i,6)
                yyxz2 = d(i,2)*d(i,5)*d(i,5)
                zzxy2 = d(i,3)*d(i,4)*d(i,4)
                deta = abs(abc+two*d(i,4)*d(i,5)*d(i,6)-xxyz2-yyxz2-zzxy2)
                deta = one/max(deta,em20)
                di(i,1) = (abc-xxyz2)*deta/max(d(i,1),em20)
                di(i,2) = (abc-yyxz2)*deta/max(d(i,2),em20)
                di(i,3) = (abc-zzxy2)*deta/max(d(i,3),em20)
                di(i,4) = (d(i,5)*d(i,6)-d(i,4)*d(i,3))*deta
                di(i,5) = (d(i,6)*d(i,4)-d(i,5)*d(i,2))*deta
                di(i,6) = (d(i,4)*d(i,5)-d(i,6)*d(i,1))*deta
            ENDIF
        ENDDO
C
        RETURN
        END SUBROUTINE a3invdp_v