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170 lines
5.4 KiB
170 lines
5.4 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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SUBROUTINE FILSMO (MXND, MLN, XN, YN, ZN, LXK, KXL, NXL, LXN,
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& LLL, NNN, NNN2, LNODES, BNSIZE, NLOOP, XMIN, XMAX, YMIN, YMAX,
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& ZMIN, ZMAX, DEV1, KREG)
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C***********************************************************************
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C SUBROUTINE FILSMO = MESH SMOOTHING DONE BY ISOPARAMETRIC/EQUAL
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C ANGULAR SMOOTHING OF THE ADDED INTERIOR (FREE)
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C BOUNDARY ROW AND THEN A LENGTH-WEIGHTED/EQUAL
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C ANGULAR BOUNDARY LAPLACIAN OF THE INTERIOR NODES.
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C THE FREE BOUNDARY IS FINALLY SMOOTHED AGAIN.
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C***********************************************************************
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C VARIABLES USED:
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C WFAC = WEIGHT (0. = LAPLACIAN, 1. = ISOPARAMETRIC)
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C NIT = THE MAX NUMBER OF ITERATIONS TO DO.
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C EPS = MINIMUM DISTANCE NODES MUST MOVE TO CONTINUE ITERATIONS
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C RO = AN UNDER- OR OVER-RELAXATION FACTOR (NORMALLY 1.0)
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C***********************************************************************
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COMMON /TIMING/ TIMEA, TIMEP, TIMEC, TIMEPC, TIMEAJ, TIMES
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DIMENSION XN(MXND), YN(MXND), ZN(MXND)
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DIMENSION LXN(4, MXND), NXL(2, 3*MXND)
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DIMENSION LXK(4, MXND), KXL(2, 3*MXND)
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DIMENSION LINES(20), LNODES (MLN, MXND), BNSIZE (2, MXND)
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LOGICAL BIG, ERR, GRAPH, DONE
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CHARACTER*3 DEV1
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CALL GETIME (TIME1)
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GRAPH = .FALSE.
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DONE = .FALSE.
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WT = 10.
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NIT = MAX0 (5 * NLOOP, 40)
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TOL = .03
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VRO = 1.
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RO = 1.
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WFAC = 1.0
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WFAC2 = .5
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CALL MNORM (MXND, XN, YN, NXL, LLL, STDLEN)
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EPS = TOL * STDLEN
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IF (RO .LT. 0.01) RO = 1.
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EPS2 = (EPS * RO)**2
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C FIRST SMOOTH THE ADDED ROW
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IF (NLOOP .GT. 0) THEN
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CALL ROWSMO (MXND, MLN, XN, YN, ZN, LXK, KXL, NXL, LXN, NNN,
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& WFAC, WFAC2, NIT, EPS, RO, NNN2, LNODES, BNSIZE, LLL,
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& GRAPH, XMIN, XMAX, YMIN, YMAX, ZMIN, ZMAX, DEV1, KREG)
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ENDIF
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C NOW SMOOTH THE INTERIOR NODES
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C ITERATION LOOP
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DO 140 IT = 1, NIT
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BIG = .FALSE.
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C NODE LOOP
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DO 130 NODE = 1, NNN
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IF ( (LXN (1, NODE) .GT. 0) .AND.
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& (LXN (2, NODE) .GT. 0) .AND.
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& (LNODES (4, NODE) .EQ. - 2) ) THEN
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DONE = .TRUE.
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FX = 0.
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FY = 0.
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SL = 0.
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VL = 0.
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C LOOP THROUGH ALL LINES CONNECTED TO NODE
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CALL GETLXN (MXND, LXN, NODE, LINES, KOUNT, ERR)
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IF (ERR) GOTO 150
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DO 100 IL = 1, KOUNT
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L = LINES (IL)
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NEND = NXL (1, L) + NXL (2, L) - NODE
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DX = XN (NEND) - XN (NODE)
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DY = YN (NEND) - YN (NODE)
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AL = SQRT (DX * DX + DY * DY)
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C CHECK FOR A BOUNDARY NODE AT THE OTHER END
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C OF THE LINE - TRY TO AVERAGE ANGULAR ERRORS WITH THE BOUNDARY WHERE
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C POSSIBLE - THIS MEANS ADDING IN AN EXTRA VECTOR TO PULL THE NODE
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C BACK TO WHERE IT OUGHT TO BE TO BE AT EQUAL ANGLES
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IF (LXN (2, NEND) .LT. 0) THEN
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CALL SETN02 (MXND, NXL, LXK, KXL, L, NEND, NODE,
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& N0, N2)
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CALL EQLANG (MXND, XN, YN, LXN, NODE, N0, N2,
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& NEND, AL, VRO, VXDEL, VYDEL)
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VL = SQRT (VXDEL * VXDEL + VYDEL * VYDEL)
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FX = FX + (VXDEL * WT * VL)
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FY = FY + (VYDEL * WT * VL)
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SL = SL + VL * WT
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ENDIF
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FX = FX + DX * AL
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FY = FY + DY * AL
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SL = SL + AL
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100 CONTINUE
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C MOVE THE NODE
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DELX = RO * FX/SL
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DELY = RO * FY/SL
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C ERASE THE NODE'S LINES IF GRAPH IS ON
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IF (GRAPH) THEN
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CALL LCOLOR('BLACK')
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DO 110 II = 1, KOUNT
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IDRAW = LINES(II)
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NODE1 = NXL (1, IDRAW)
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NODE2 = NXL (2, IDRAW)
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CALL D2NODE (MXND, XN, YN, NODE1, NODE2)
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110 CONTINUE
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CALL LCOLOR ('WHITE')
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ENDIF
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XN (NODE) = XN (NODE)+DELX
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YN (NODE) = YN (NODE)+DELY
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C REPLOT THE NODE'S LINES IF GRAPH IS ON
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IF (GRAPH) THEN
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DO 120 II = 1, KOUNT
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IDRAW = LINES(II)
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NODE1 = NXL (1, IDRAW)
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NODE2 = NXL (2, IDRAW)
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CALL D2NODE (MXND, XN, YN, NODE1, NODE2)
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120 CONTINUE
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CALL SFLUSH
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ENDIF
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IF (DELX ** 2 + DELY ** 2 .GT. EPS2) BIG = .TRUE.
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ENDIF
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130 CONTINUE
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IF (.NOT.BIG) GOTO 150
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140 CONTINUE
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150 CONTINUE
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C NOW RESMOOTH THE ADDED ROW IF THE MESH HAS CHANGED INTERNALLY
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IF ((NLOOP .GT. 0) .AND. (DONE)) THEN
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CALL ROWSMO (MXND, MLN, XN, YN, ZN, LXK, KXL, NXL, LXN, NNN,
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& WFAC, WFAC2, NIT, EPS, RO, NNN2, LNODES, BNSIZE, LLL,
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& GRAPH, XMIN, XMAX, YMIN, YMAX, ZMIN, ZMAX, DEV1, KREG)
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ENDIF
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C NOW RESET ALL THE NODES AS BEING SMOOTHED
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DO 160 I = 1, NNN
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LNODES (4, I) = IABS (LNODES (4, I))
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160 CONTINUE
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CALL GETIME (TIME2)
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TIMES = TIMES + TIME2 - TIME1
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RETURN
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END
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