count3.F

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C
!||====================================================================
!||    count3      ../starter/source/interfaces/interf1/count3.F
!||--- called by ------------------------------------------------------
!||    inslin      ../starter/source/interfaces/interf1/inslin.F
!||    insurf      ../starter/source/interfaces/interf1/insurf.F
!||    insurf23    ../starter/source/interfaces/interf1/insurf23.F
!||--- calls      -----------------------------------------------------
!||====================================================================
      SUBROUTINE count3(IRECT,MNN,N,NRT,NTAG)
C-----------------------------------------------------------------------
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER N, NRT
      INTEGER IRECT(*), MNN(*)
      INTEGER, DIMENSION(0:2*NUMNOD), INTENT(INOUT) ::  NTAG
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
#include      "com04_c.inc"
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER IWORK(70000)
      INTEGER I, NN, K,NINDEX0
        INTEGER, DIMENSION(:), ALLOCATABLE ::  INDEX0
C-----------------------------------------------
C
      ALLOCATE(index0(2*numnod))
      ntag(0) = 1      ! special case IRECT=0
      n = 0
      nindex0 = 0
      DO i=1,nrt*4     ! 4 : size of IRECT
        nn = irect(i)
        IF(ntag(nn) == 0) THEN
          n=n+1
          mnn(n)=nn
          ntag(nn)=1
          nindex0 = nindex0 + 1
          index0(nindex0) = nn
        END IF            
      ENDDO
C Need to sort MNM but avoid treatment over NUMNOD if too big
      IF(n>numnod/10)THEN  ! test to check which treatment is best
        n=0
        DO i=1,numnod
          IF(ntag(i) /= 0) THEN
            n=n+1
            mnn(n)=i
            ntag(i) = 0
          END IF
        END DO
      ELSE   ! N needs to be at least < NUMNOD/2
        CALL my_orders(0,iwork,mnn,ntag(1),n,1)
        DO i=1,n
          ntag(n+i)=mnn(i)
        END DO
        DO i=1,n
          mnn(i)=ntag(n+ntag(i))
        END DO
        DO i=1,n
          ntag(n+ntag(i)) = 0
        ENDDO
        DO i=1,n
          ntag(n+i) = 0
          ntag(i) = 0
        ENDDO
      END IF
 
#include "vectorize.inc"
      DO k = 1,nindex0
        ntag(index0(k)) = 0
      ENDDO        
 
      DEALLOCATE(index0)
C
      RETURN
      END