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158 lines
4.9 KiB
158 lines
4.9 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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C=======================================================================
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SUBROUTINE HIDZM (ZOOM, XZMMIN, XZMMAX, YZMMIN, YZMMAX,
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& XINMIN, XINMAX, YINMIN, YINMAX, LENF, NLNKF, LINKF,
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& XN, YN, HIDEF)
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C=======================================================================
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C --*** HIDZM *** (MESH) Hide face outside zoom window
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C -- Written by Amy Gilkey - revised 11/16/87
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C --
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C --HIDZM marks a face as hidden if the maximum box around
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C --all its nodes is outside the zoom window. Some faces
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C --that are outside the zoom window may not be flagged.
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C --
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C --Parameters:
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C -- ZOOM - IN/OUT - reset if no nodes outside zoom window
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C -- XZMMIN, XZMMAX, YZMMIN, YZMMAX - IN - the box enclosing the
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C -- zoom window
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C -- XINMIN, XINMAX, YINMIN, YINMAX - OUT - the box enclosing the
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C -- minimum needed window
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C -- LENF - IN - the cumulative face counts by element block
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C -- NLNKF - IN - the number of nodes per face
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C -- LINKF - IN - the connectivity for all faces
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C -- XN, YN - IN - the nodal coordinates
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C -- HIDEF(i) - IN/OUT - set true iff face i is hidden
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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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PARAMETER (KFVIS=0, KFNODH=10, KFPOUT=20, KFOUT=90, KFAWAY=100)
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common /debugc/ cdebug
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common /debugn/ idebug
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character*8 cdebug
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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 ZOOM
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INTEGER LENF(0:NELBLK)
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INTEGER NLNKF(NELBLK)
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INTEGER LINKF(*)
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REAL XN(*), YN(*)
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INTEGER HIDEF(*)
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ZOOM = .FALSE.
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XXMIN = XZMMIN
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XXMAX = XZMMAX
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YYMIN = YZMMIN
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YYMAX = YZMMAX
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DO 120 IELB = 1, NELBLK
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IXL0 = IDBLNK (IELB, 0, LENF, NLNKF) - 1
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DO 110 IFAC = LENF(IELB-1)+1, LENF(IELB)
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C --Calculate enclosing X-Y-Z box for face
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XMIN = XN(LINKF(IXL0+1))
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XMAX = XMIN
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YMIN = YN(LINKF(IXL0+1))
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YMAX = YMIN
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DO 100 ILINK = 2, NLNKF(IELB)
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X = XN(LINKF(IXL0+ILINK))
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Y = YN(LINKF(IXL0+ILINK))
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XMIN = MIN (XMIN, X)
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XMAX = MAX (XMAX, X)
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YMIN = MIN (YMIN, Y)
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YMAX = MAX (YMAX, Y)
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100 CONTINUE
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C --Hide face if outside zoom window
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IF ((XMAX .LE. XZMMIN) .OR. (XMIN .GE. XZMMAX)
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& .OR. (YMAX .LE. YZMMIN) .OR. (YMIN .GE. YZMMAX)) THEN
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HIDEF(IFAC) = KFPOUT
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ZOOM = .TRUE.
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ELSE IF ((XMIN .LE. XZMMIN) .OR. (XMAX .GE. XZMMAX)
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& .OR. (YMIN .LE. YZMMIN) .OR. (YMAX .GE. YZMMAX)) THEN
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XXMIN = MIN (XXMIN, XMIN)
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XXMAX = MAX (XXMAX, XMAX)
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YYMIN = MIN (YYMIN, YMIN)
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YYMAX = MAX (YYMAX, YMAX)
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ZOOM = .TRUE.
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END IF
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IXL0 = IXL0 + NLNKF(IELB)
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110 CONTINUE
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120 CONTINUE
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IF (.NOT. ZOOM) THEN
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XINMIN = XZMMIN
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XINMAX = XZMMAX
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YINMIN = YZMMIN
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YINMAX = YZMMAX
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ELSE
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XINMIN = XXMIN
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XINMAX = XXMAX
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YINMIN = YYMIN
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YINMAX = YYMAX
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END IF
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IF (.NOT. ZOOM) RETURN
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nout = 0
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nhid = 0
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DO 150 IELB = 1, NELBLK
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IXL0 = IDBLNK (IELB, 0, LENF, NLNKF) - 1
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DO 140 IFAC = LENF(IELB-1)+1, LENF(IELB)
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IF (HIDEF(IFAC) .EQ. KFPOUT) THEN
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C --Calculate enclosing X-Y-Z box for face
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XMIN = XN(LINKF(IXL0+1))
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XMAX = XMIN
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YMIN = YN(LINKF(IXL0+1))
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YMAX = YMIN
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DO 130 ILINK = 2, NLNKF(IELB)
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X = XN(LINKF(IXL0+ILINK))
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Y = YN(LINKF(IXL0+ILINK))
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XMIN = MIN (XMIN, X)
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XMAX = MAX (XMAX, X)
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YMIN = MIN (YMIN, Y)
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YMAX = MAX (YMAX, Y)
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130 CONTINUE
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C --Hide face if outside zoom window
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IF ((XMAX .LE. XXMIN) .OR. (XMIN .GE. XXMAX)
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& .OR. (YMAX .LE. YYMIN) .OR. (YMIN .GE. YYMAX)) THEN
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HIDEF(IFAC) = KFOUT
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nhid = nhid + 1
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ELSE
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XINMIN = MIN (XINMIN, XMIN)
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XINMAX = MAX (XINMAX, XMAX)
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YINMIN = MIN (YINMIN, YMIN)
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YINMAX = MAX (YINMAX, YMAX)
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nout = nout + 1
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END IF
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END IF
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IXL0 = IXL0 + NLNKF(IELB)
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140 CONTINUE
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150 CONTINUE
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if ((cdebug .eq. 'HIDDEN') .and. (idebug .ge. 1)) then
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write (*, '(1x,a,i5)') 'faces outside zoom window =', nout
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write (*, '(1x,a,i5)') 'faces outside zoom slack =', nhid
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end if
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RETURN
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END
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