i6impact.F

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!||====================================================================
!||    i6ipmact   ../engine/source/interfaces/inter3d/i6impact.F
!||--- called by ------------------------------------------------------
!||    i6main     ../engine/source/interfaces/inter3d/i6main.F
!||====================================================================
      SUBROUTINE i6ipmact(
     1   LOLD,    IRTL,    IRTLO,   CST,
     2   IRECT,   MSR,     NSV,     V,
     3   VNI,     VNT,     N1,      N2,
     4   N3,      SSC,     TTC,     H1,
     5   H2,      H3,      H4,      XFACE,
     6   LFT,     LLT,     NFT)
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, INTENT(INOUT) :: LFT
      INTEGER, INTENT(INOUT) :: LLT
      INTEGER, INTENT(INOUT) :: NFT
      INTEGER IRECT(4,*),MSR(*),NSV(*), IRTL(*), IRTLO(*), LOLD(*)
C     REAL
      my_real
     .   v(3,*),cst(2,*),vni(*),vnt(*)
      my_real, DIMENSION(MVSIZ), INTENT(IN) ::  n1,n2,n3,ssc,ttc,xface
      my_real, DIMENSION(MVSIZ), INTENT(IN) :: h1,h2,h3,h4
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER I,L,IL,IG,NN
C     REAL
      my_real
     .   VPX(LLT),VPY(LLT),VPZ(LLT),VIX(LLT),VIY(LLT),VIZ(LLT),
     .   VX1(LLT),VY1(LLT),VZ1(LLT),VX2(LLT),VY2(LLT),VZ2(LLT),
     .   VX3(LLT),VY3(LLT),VZ3(LLT),VX4(LLT),VY4(LLT),VZ4(LLT)
      my_real
     .   dvx,dvy,dvz,vtx,vty,vtz
C-----------------------------------------------
      DO i=lft,llt
        il = i+nft
c
        IF (xface(i) == zero) THEN            ! no impact     
          irtlo(il) = 0
          lold(i)   = 0                  
        ELSE
          lold(i) = iabs(irtlo(il))
          IF (lold(i) == 0) THEN              ! first time impact
            irtlo(il) = irtl(il)*xface(i)
            cst(1,il) = ssc(i)
            cst(2,il) = ttc(i)
          ENDIF
        ENDIF
      ENDDO
c-----------------------------
      DO i=lft,llt
        il = i+nft
        IF (lold(i) == 0) THEN              ! first time impact
          vni(i) = zero
          vnt(i) = zero
        ELSE
          ig = nsv(il)     
          l  = irtl(il)
c
          vix(i) = v(1,ig) 
          viy(i) = v(2,ig) 
          viz(i) = v(2,ig) 
c
          nn = msr(irect(1,lold(i)))   
          vx1(i) = v(1,nn) 
          vy1(i) = v(2,nn) 
          vz1(i) = v(2,nn) 
          nn = msr(irect(2,lold(i))) 
          vx2(i) = v(1,nn) 
          vy2(i) = v(2,nn) 
          vz2(i) = v(2,nn) 
          nn = msr(irect(3,lold(i))) 
          vx3(i) = v(1,nn) 
          vy3(i) = v(2,nn) 
          vz3(i) = v(2,nn) 
          nn = msr(irect(4,lold(i))) 
          vx4(i) = v(1,nn) 
          vy4(i) = v(2,nn) 
          vz4(i) = v(2,nn) 
c
          vpx(i) = h1(i)*vx1(i)+h2(i)*vx2(i)+h3(i)*vx3(i)+h4(i)*vx4(i)
          vpy(i) = h1(i)*vy1(i)+h2(i)*vy2(i)+h3(i)*vy3(i)+h4(i)*vy4(i)
          vpz(i) = h1(i)*vz1(i)+h2(i)*vz2(i)+h3(i)*vz3(i)+h4(i)*vz4(i)
          dvx = vix(i)-vpx(i)
          dvy = viy(i)-vpy(i)
          dvz = viz(i)-vpz(i)
c
          vni(i) = n1(i) * dvx + n2(i) * dvy + n3(i) * dvz
          
          vtx = dvx - vni(i)*n1(i)
          vty = dvy - vni(i)*n2(i)
          vtz = dvz - vni(i)*n3(i)
          vnt(i) = sqrt(vtx**2 +  vty**2 +  vtz**2)        
        ENDIF
      ENDDO
C-----------
      RETURN
      END