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78 lines
2.5 KiB
78 lines
2.5 KiB
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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C=======================================================================
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SUBROUTINE FIXELB (IELBST, LENF, IF2EL, IF2EL2, IE2ELB, NEWELB)
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C=======================================================================
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C --*** FIXELB *** (MESH) Turn on/off element blocks (3D)
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C -- Written by Amy Gilkey - revised 03/10/88
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C --
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C --FIXELB adjusts the face array to reflect the new ON element blocks.
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C --Faces in OFF element blocks are moved to the LENF(NELBLK+4) set.
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C --
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C --Parameters:
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C -- IELBST - IN - the element block status (>=0 if ON)
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C -- LENF - IN - the cumulative face counts by element block (3D only)
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C -- IF2EL - IN - the element number of each face
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C -- IF2EL2 - IN - the secondary element number of each face
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C -- IE2ELB - IN - the element block for each element
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C -- NEWELB - OUT - size = LENF(NELBLK+1)
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C --
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C --Common Variables:
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C -- Uses NELBLK of /DBNUMS/
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include 'dbnums.blk'
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COMMON /D3NUMS/ IS3DIM, NNPSUR, NUMNPF, LLNSET
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LOGICAL IS3DIM
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INTEGER IELBST(NELBLK)
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INTEGER LENF(0:NELBLK+4)
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INTEGER IF2EL(*), IF2EL2(*)
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INTEGER IE2ELB(NUMEL)
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INTEGER NEWELB(*)
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C --Check each face by its defining elements, and move face if necessary
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DO 110 IELB = 1, NELBLK+4
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DO 100 IFAC = LENF(IELB-1)+1, LENF(IELB)
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C --Determine the number of elements with ON element blocks
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NON = 0
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IF (IELBST(IE2ELB(IF2EL(IFAC))) .GE. 0) NON = NON + 1
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IEL = IF2EL2(IFAC)
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IF (IEL .GT. 0) THEN
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IF (IELBST(IE2ELB(IEL)) .GE. 0) NON = NON + 1
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END IF
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IF (NON .EQ. 0) THEN
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C --If none ON, change to an OFF face
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NEWELB(IFAC) = NELBLK+4
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ELSE IF (NON .EQ. 1) THEN
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C --If one face ON, change to a surface face
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IF (IELBST(IE2ELB(IF2EL(IFAC))) .GE. 0) THEN
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NEWELB(IFAC) = IE2ELB(IF2EL(IFAC))
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ELSE
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C --Swap nodes to simulate surface being defined by facing element
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NEWELB(IFAC) = - IE2ELB(IF2EL2(IFAC))
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END IF
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ELSE
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C --If both element blocks ON, change to an interior face
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NEWELB(IFAC) = NELBLK+1
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END IF
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100 CONTINUE
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110 CONTINUE
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RETURN
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END
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