sgetdir3.F

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!||====================================================================
!||    sgetdir3   ../engine/source/elements/thickshell/solidec/sgetdir3.F
!||--- called by ------------------------------------------------------
!||    s6cforc3   ../engine/source/elements/thickshell/solide6c/s6cforc3.F
!||    scforc3    ../engine/source/elements/thickshell/solidec/scforc3.F
!||====================================================================
      SUBROUTINE sgetdir3(NEL,RX, RY, RZ, TX, TY, TZ,
     .                    E1X,E1Y,E1Z,E2X,E2Y,E2Z,DIR,DIRB,IREP)
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 :: NEL,IREP
C
      my_real
     .   rx(*),ry(*),rz(*),tx(*),ty(*),tz(*),dir(nel,6),dirb(mvsiz,2),
     .   e1x(*),e1y(*),e1z(*),e2x(*),e2y(*),e2z(*)
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER I
C
      my_real 
     .   v1,v2,v3,vr,vs,aa,bb,suma
C-----------------------------------------------
      IF (irep == 0) THEN                   
        DO i=1,nel                        
          dirb(i,1) = dir(i,1)              
          dirb(i,2) = dir(i,2)              
        ENDDO                               
      ELSE                                  
        DO i=1,nel                        
          aa = dir(i,1)                     
          bb = dir(i,2)                     
          v1 = aa*tx(i) + bb*rx(i)          
          v2 = aa*ty(i) + bb*ry(i)          
          v3 = aa*tz(i) + bb*rz(i)          
          vr=v1*e1x(i)+v2*e1y(i)+v3*e1z(i)  
          vs=v1*e2x(i)+v2*e2y(i)+v3*e2z(i)  
          suma=sqrt(vr*vr + vs*vs)          
          suma=one/max(em20,suma)            
          dirb(i,1) = vr*suma               
          dirb(i,2) = vs*suma               
        ENDDO                               
      ENDIF                                 
C-----------
      RETURN
      END