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144 lines
5.4 KiB
144 lines
5.4 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 CONTOR (VARNP, LENF, NLNKF, LINKF, HIDEF,
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& XN, YN, ZN, XF, YF, ZF, LENL, LINSET,
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& IN2ELB, ISVOK, FMIN, FMAX, *)
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C=======================================================================
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C --*** CONTOR *** (DETOUR) Plot line contours
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C -- Written by Amy Gilkey - revised 10/29/87
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C -- D. P. Flanagan, 03/30/83
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C --
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C --CONTOR draws contour lines with alphabetic tags in a color
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C --sequence. The contour algorithm assumes that the elements do not
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C --contain internal nodes. The element interpolation field is
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C --approximated by logically drawing lines from each node to the element
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C --center and, thusly, dividing the element into triangles. Contour
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C --lines are then drawn by connecting the intersection points of the
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C --sub-element edges and the contour plane. The contour letter is
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C --displayed at points where the contour plane intersects a mesh boundary
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C --or element block boundary line. Also, every "LABINC" interior mesh line
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C --which intersects the contour plane is labelled with the contour letter.
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C --
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C --The element block status indicates which element blocks are active
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C --for contours. No contours are drawn in inactive elements. Mesh lines
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C --are inactive if either of its nodes is not connected to an active
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C --element. Inactive mesh lines are not labeled with contour letters.
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C --
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C --Parameters:
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C -- VARNP - IN - the contour function values
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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 -- HIDEF(i) - IN - true iff face i is hidden (3D only)
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C -- XN, YN, ZN - IN - the nodal coordinates
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C -- XF, YF, ZF - IN - the face center coordinates
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C -- LENL - IN - the cumulative line counts by element block
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C -- LINSET - IN - the sorted line set
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C -- IN2ELB - IN - the element block for each node;
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C -- <0 if not in any selected element block
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C -- =0 if in more than one selected element block
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C -- ISVOK - IN - ISVOK(i) is true iff the contour variable is defined
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C -- for element block i
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C -- FMIN, FMAX - IN - the minimum and maximum function values
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C -- * - return statement if the cancel function is active
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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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C -- Uses IS3DIM, LLNSET of /D3NUMS/
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C -- Uses NCNTR, LABINC, MAXMIN, MAXMAX of /CNTR/
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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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COMMON /CNTR/ CINTOK, LINCON, NCNTR, CMIN, CMAX, DELC,
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& CINTV(256), NOCMIN, NOCMAX, LABINC, MAXMIN, MAXMAX
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LOGICAL CINTOK, LINCON, NOCMIN, NOCMAX
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REAL VARNP(*)
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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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LOGICAL HIDEF(*)
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REAL XN(*), YN(*), ZN(*)
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REAL XF(*), YF(*), ZF(*)
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INTEGER LENL(-2:NELBLK), LINSET(LLNSET,*)
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INTEGER IN2ELB(*)
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LOGICAL ISVOK(NELBLK)
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LOGICAL GRABRT
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DO 150 NC = 1, NCNTR
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CNTR = CNTRI (NC)
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C --Skip this contour if the values are outside the contour value
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IF ((FMIN .LE. CNTR) .AND. (FMAX .GE. CNTR)) THEN
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CALL GRCOLR (NC)
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DO 130 IELB = 1, NELBLK
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IF (ISVOK(IELB) .AND. (NLNKF(IELB) .GT. 2)) THEN
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DO 100 IFAC = LENF(IELB-1)+1, LENF(IELB)
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IF (IS3DIM) THEN
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IF (HIDEF(IFAC)) GOTO 100
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END IF
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IF (GRABRT ()) RETURN 1
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IXL = IDBLNK (IELB, IFAC, LENF, NLNKF)
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CALL CONTF (CNTR, VARNP, NLNKF(IELB), LINKF(IXL),
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& XN, YN, ZN, XF(IFAC), YF(IFAC), ZF(IFAC))
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100 CONTINUE
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C --Label interior lines
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IF (LABINC .GT. 0) THEN
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NHIT = 0
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DO 110 IL = LENL(IELB-1)+1, LENL(IELB)
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CALL CONLAB (NC, CNTR, NHIT, LABINC,
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& LINSET(1,IL), VARNP, XN, YN, ZN, IN2ELB,
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& *160)
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110 CONTINUE
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END IF
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C --Label interior lines which are on the edge
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IF (IS3DIM .AND. (LABINC .GE. 0)) THEN
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NHIT = 0
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DO 120 IL = LENL(IELB-1)+1, LENL(IELB)
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C --Label edge line only
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IF (LINSET(3,IL) .LT. 0) THEN
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CALL CONLAB (NC, CNTR, NHIT, 1, LINSET(1,IL),
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& VARNP, XN, YN, ZN, IN2ELB, *160)
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END IF
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120 CONTINUE
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END IF
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END IF
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130 CONTINUE
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C --Label mesh boundary and element block boundary lines
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IF (LABINC .GE. 0) THEN
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NHIT = 0
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DO 140 IL = 1, LENL(0)
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CALL CONLAB (NC, CNTR, NHIT, 1, LINSET(1,IL),
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& VARNP, XN, YN, ZN, IN2ELB, *160)
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140 CONTINUE
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END IF
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CALL PLTFLU
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END IF
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150 CONTINUE
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RETURN
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160 CONTINUE
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RETURN 1
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END
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