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100 lines
2.9 KiB
100 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 PICKN3 (PROMPT, NUMNPF, XN, YN, ZN, HIDENP,
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& MIDDEF, NODRES , *)
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C=======================================================================
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C --*** PICKND *** (MESH) Pick a node and return node id
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C -- Written by Ray J. Meyers - 20 June, 1990
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C --
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C --PICK3D picks a user-selected node. PICKND
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C --puts a cursor on the screen, waits until the user positions the cursor,
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C --then translates finds the nearest
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C --node and returns its node id.
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C --
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C --Parameters:
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C -- PROMPT - IN - the point requested
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C -- NUMNPF - IN - the number of nodes desired
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C -- XN, YN, ZN - IN - the displayed mesh nodal coordinates
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C -- HIDENP - IN - node i is defined iff HIDENP(i) is true
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C -- MIDDEF - IN - true if the middle of the displayed mesh is to be the
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C -- starting position, else use the last selected position
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C -- NODRES - the returned node number
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C -- * - return statement if error picking point
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C --
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C --Common Variables:
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C -- Sets DXLAST, DYLAST of /PICK/
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C -- Uses /PICK/
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PARAMETER (KLFT=1, KRGT=2, KBOT=3, KTOP=4, KNEA=5, KFAR=6)
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COMMON /PICK/ INITP, PKDEF,
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& PKMESH(KTOP), PKRMAT(3,3), PKRCEN(3),
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& DMESH(KTOP), DVRAT, DXMID, DYMID, DXLAST, DYLAST
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LOGICAL INITP, PKDEF
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CHARACTER*(*) PROMPT
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REAL XN(*), YN(*), ZN(*)
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LOGICAL HIDENP(*)
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LOGICAL MIDDEF
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CHARACTER*80 XPRMPT
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CHARACTER CH
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IF (.NOT. INITP) THEN
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CALL PRTERR ('CMDERR', 'No mesh is displayed')
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GOTO 110
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END IF
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C --Put up the cursor at the default location and wait for the user
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C --to select a point
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IF (PROMPT .NE. ' ') THEN
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XPRMPT = 'Pick node nearest ' // PROMPT // '...'
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ELSE
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XPRMPT = ' '
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END IF
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IF (MIDDEF) THEN
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DXRES = DXMID
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DYRES = DYMID
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ELSE
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DXRES = DXLAST
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DYRES = DYLAST
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END IF
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CALL GRIKEY (XPRMPT, DXRES, DYRES, CH, *110)
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C --Save the selected position
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DXLAST = DXRES
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DYLAST = DYRES
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C --Translate the point from device coordinates into object coordinates
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XRES = PKMESH(KLFT) + (DXRES - DMESH(KLFT)) * DVRAT
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YRES = PKMESH(KBOT) + (DYRES - DMESH(KBOT)) * DVRAT
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C --Get the coordinates of the node nearest the point
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DISMIN = 10E+30
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DO 100 INP = 1, NUMNPF
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IF (HIDENP(INP)) GOTO 100
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X = XRES - XN(INP)
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Y = YRES - YN(INP)
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DIS = X*X + Y*Y
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IF (DIS .LT. DISMIN) THEN
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DISMIN = DIS
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NODRES = INP
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END IF
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100 CONTINUE
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RETURN
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110 CONTINUE
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RETURN 1
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END
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