peveci.F

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!||====================================================================
!||    peveci   ../starter/source/elements/beam/peveci.F
!||--- called by ------------------------------------------------------
!||    pinit3   ../starter/source/elements/beam/pinit3.F
!||====================================================================
      SUBROUTINE peveci(RLOC, X1,X3,Y1,Y3,Z1,Z3,X2,Y2,Z2,NC2,NC3,
     .                  IVECT,VECT) 
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 , DIMENSION(MVSIZ), INTENT(IN) :: NC2,NC3,IVECT
      my_real , DIMENSION(MVSIZ), INTENT(IN) :: x2,y2,z2
      my_real , INTENT(IN) :: vect(3,mvsiz)
 
C     REAL
      my_real
     .   rloc(3,*),
     .   x1(mvsiz), x3(mvsiz), 
     .   y1(mvsiz), y3(mvsiz),
     .   z1(mvsiz), z3(mvsiz), 
     .   e2x(mvsiz), e2y(mvsiz), e2z(mvsiz)
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
#include      "vect01_c.inc"
C-----------------------------------------------
C   L o c a l   V a r i a b l e s 
C-----------------------------------------------
      INTEGER I
      my_real
     .   sum,e1x,e1y,e1z
C---------------------------------------------------------------------
      DO i=lft,llt
        IF (ivect(i) > 0) THEN
C         Plane XY defined by input vector          
          e2x(i)=vect(1,i)
          e2y(i)=vect(2,i)
          e2z(i)=vect(3,i)
        ELSEIF ((ivect(i) < 0).OR.(nc3(i)==nc2(i))) THEN
C         Input vector or N1-N3 colinear with beam axis - Y or Z global are used           
          e1x=x2(i)-x1(i)
          e1y=y2(i)-y1(i)
          e1z=z2(i)-z1(i)
          sum = e1x*e1x + e1z*e1z
          IF (sum < em20) THEN
            e2x(i)=zero
            e2y(i)=zero
            e2z(i)=one
          ELSE
            e2x(i)=zero
            e2y(i)=one
            e2z(i)=zero
          END IF
        ELSE
C         Plane XY defined by N1-N3      
          e2x(i)=x3(i)-x1(i)
          e2y(i)=y3(i)-y1(i)
          e2z(i)=z3(i)-z1(i)
C         ERROR MESSAGE IN PCOORI
          IF (sqrt(e2x(i)**2 + e2y(i)**2 + e2z(i)**2) < em20) RETURN
        END IF
      ENDDO
C
      DO i=lft,llt
        IF (nc3(i)==nc2(i)) cycle
        sum   =sqrt(e2x(i)*e2x(i)+e2y(i)*e2y(i)+e2z(i)*e2z(i))
        e2x(i)=e2x(i)/sum
        e2y(i)=e2y(i)/sum
        e2z(i)=e2z(i)/sum
      ENDDO
C
      DO i=lft,llt
        rloc(1,i)=e2x(i)
        rloc(2,i)=e2y(i)
        rloc(3,i)=e2z(i)
      ENDDO
C-----------
      RETURN
      END