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89 lines
2.9 KiB
89 lines
2.9 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 FIXAL3 (ALIVE, LENF, IF2EL, IF2EL2, IE2ELB, NEWELB)
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C=======================================================================
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C --*** FIXAL3 *** (MESH) Adjust for element birth/death (3D)
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C -- Written by Amy Gilkey - revised 03/10/88
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C --
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C --FIXAL3 adjusts the face array to reflect the new element
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C --states. Faces that are dead are moved to LENF(NELBLK+2).
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C --
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C --An element death causes all the faces of the element to be moved
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C --as follows:
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C -- Surface -> dead
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C -- Interior -> surface
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C --An element birth causes all the faces of the element to be moved
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C --as follows:
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C -- Dead -> surface (if one alive element for face) or
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C -- interior (if two alive elements)
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C -- Surface -> interior
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C --
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C --Parameters:
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C -- ALIVE - IN - true iff element i is alive
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C -- LENF - IN - the cumulative face counts by element block
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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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LOGICAL ALIVE(NUMEL)
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INTEGER LENF(0:NELBLK+2)
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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+2
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DO 100 IFAC = LENF(IELB-1)+1, LENF(IELB)
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C --Determine the number of elements which are alive for this face
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NALIVE = 0
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IF (ALIVE(IF2EL(IFAC))) NALIVE = NALIVE + 1
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IEL = IF2EL2(IFAC)
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IF (IEL .GT. 0) THEN
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IF (ALIVE(IEL)) NALIVE = NALIVE + 1
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END IF
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IF (NALIVE .EQ. 0) THEN
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C --If none alive, change to a DEAD face
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NEWELB(IFAC) = NELBLK+2
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ELSE IF (NALIVE .EQ. 1) THEN
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C --If only one alive, change to a SURFACE face
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IF (ALIVE(IF2EL(IFAC))) 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 IF (NALIVE .EQ. 2) THEN
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C --If both elements are alive, 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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