cneveci.F

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!||====================================================================
!||    cneveci           ../starter/source/elements/shell/coqueba/cneveci.F
!||--- called by ------------------------------------------------------
!||    cbafint_reg_ini   ../starter/source/elements/shell/coqueba/cbafint_reg_ini.F
!||    cbainit3          ../starter/source/elements/shell/coqueba/cbainit3.F
!||    cnepsini          ../starter/source/elements/shell/coqueba/cnepsini.F
!||--- calls      -----------------------------------------------------
!||    clskew3           ../starter/source/elements/shell/coque/clskew.F
!||====================================================================
      SUBROUTINE cneveci(JFT ,JLT ,AREA,
     .           X1  ,X2  ,X3  ,X4  ,Y1  ,Y2  ,
     .           Y3  ,Y4  ,Z1  ,Z2  ,Z3  ,Z4  ,
     .           E1X, E2X, E3X, E1Y, E2Y, E3Y ,E1Z, E2Z, E3Z )
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C-----------------------------------------------
C   G l o b a l   P a r a m e t e r s
C-----------------------------------------------
#include      "mvsiz_p.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER JFT,JLT
      my_real, DIMENSION(MVSIZ), INTENT(IN)  :: 
     .                           X1,X2,X3,X4,Y1,Y2,Y3,Y4,Z1,Z2,Z3,Z4
      my_real, DIMENSION(MVSIZ), INTENT(OUT) :: area,
     .                   e1x, e2x, e3x, e1y, e2y, e3y ,e1z, e2z, e3z
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER I,I1
      my_real, DIMENSION(MVSIZ)  :: X21,Y21,Z21,X31,Y31,Z31,X42,Y42,Z42,
     .                              RX, RY, RZ, SX, SY, SZ,SUM
C=======================================================================
      DO i=jft,jlt
        x21(i)=x2(i)-x1(i)
        y21(i)=y2(i)-y1(i)
        z21(i)=z2(i)-z1(i)
        x31(i)=x3(i)-x1(i)
        y31(i)=y3(i)-y1(i)
        z31(i)=z3(i)-z1(i)
        x42(i)=x4(i)-x2(i)
        y42(i)=y4(i)-y2(i)
        z42(i)=z4(i)-z2(i)
      ENDDO
C
      DO i=jft,jlt
        rx(i)=x31(i)-x42(i)
        ry(i)=y31(i)-y42(i)
        rz(i)=z31(i)-z42(i)
        sx(i)=x31(i)+x42(i)
        sy(i)=y31(i)+y42(i)
        sz(i)=z31(i)+z42(i)
      ENDDO
C----------------------------
C     LOCAL SYSTEM
C----------------------------
      i1 = 0
      CALL clskew3(jft,jlt,i1,
     .   rx, ry, rz, 
     .   sx, sy, sz, 
     .   e1x,e2x,e3x,e1y,e2y,e3y,e1z,e2z,e3z,sum)
C
      DO i=jft,jlt
        area(i) = fourth*sum(i)
      ENDDO
c-----------
      RETURN
      END