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90 lines
2.7 KiB
90 lines
2.7 KiB
2 years ago
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C Copyright(C) 1999-2020 National Technology & Engineering Solutions
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C of Sandia, LLC (NTESS). Under the terms of Contract DE-NA0003525 with
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C NTESS, the U.S. Government retains certain rights in this software.
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C
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C See packages/seacas/LICENSE for details
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SUBROUTINE SRTNBC (MXNFLG, NPNBC, NNN, NNFLG, NNLEN, NNPTR,
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& NODES, LSTNBC, IHERE, NNNBC, NBCNOD, NNLIST)
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C***********************************************************************
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C SUBROUTINE SRTNBC = SORTS THE LIST OF NODAL BOUNDARY FLAGS
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C***********************************************************************
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C VARIABLES USED:
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C IHERE = AN ATTENDANCE ARRAY TO SEE IF A NODE HAS BEEN FLAGGED
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C NNFLG = THE ARRAY OF FLAG VALUES
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C NNLEN = NUMBER OF NODES IN THE NODE LIST ASSOCIATED WITH EACH
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C FLAG
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C NNPTR = POINTER TO THE FIRST NODE IN LIST FOR EACH FLAG
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C NODES = THE NODE LIST
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C NNN = THE NUMBER OF NODES IN THE MESH
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C MXNFLG = THE NUMBER OF ENTRIES IN THE BOUNDARY LIST
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C ENTER = .TRUE. IF THE FOLLOWING NODES ARE TO BE CHECKED "HERE"
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C FOUND = .TRUE. IF A NEW UNIQUE FLAG HAS BEEN FOUND
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C***********************************************************************
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DIMENSION NNFLG (MXNFLG), NNLEN (MXNFLG), NNPTR (MXNFLG)
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DIMENSION NODES (NPNBC), LSTNBC (NPNBC), IHERE (NNN)
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LOGICAL ENTER, FOUND
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NNLIST = 0
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IHOLD = 1
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NBCNOD = 0
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100 CONTINUE
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ISTART = IHOLD
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IHOLD = NNNBC
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ENTER = .FALSE.
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FOUND = .FALSE.
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DO 110 I = 1, NNN
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IHERE (I) = 0
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110 CONTINUE
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DO 120 I = ISTART, NNNBC
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IF (LSTNBC (I) .LT. 0) THEN
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IF (FOUND) THEN
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IF (ENTER)IHOLD = MIN0 (IHOLD, I - 1)
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ITEST = ABS (LSTNBC (I))
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IF (ITEST .EQ. NNFLG (NBCNOD)) THEN
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ENTER = .TRUE.
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LSTNBC (I) = 0
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ELSE
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ENTER = .FALSE.
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ENDIF
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ELSE
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FOUND = .TRUE.
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ENTER = .TRUE.
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NBCNOD = NBCNOD + 1
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NNFLG (NBCNOD) = ABS (LSTNBC (I))
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NNLEN (NBCNOD) = 0
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NNPTR (NBCNOD) = NNLIST + 1
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LSTNBC (I) = 0
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ENDIF
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ELSEIF (LSTNBC (I) .GT. 0) THEN
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IF (ENTER) THEN
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IHERE (LSTNBC (I)) = 1
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LSTNBC (I) = 0
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ENDIF
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ENDIF
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120 CONTINUE
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IF (FOUND) THEN
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DO 130 I = 1, NNN
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IF (IHERE (I) .EQ. 1) THEN
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NNLIST = NNLIST + 1
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NNLEN (NBCNOD) = NNLEN (NBCNOD) + 1
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NODES (NNLIST) = I
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ENDIF
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130 CONTINUE
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GOTO 100
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ELSE
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RETURN
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ENDIF
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END
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