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96 lines
2.7 KiB
96 lines
2.7 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 PICKN2 (PROMPT, NUMNPF, XN, YN, MIDDEF, NDRES, *)
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C=======================================================================
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C --*** PICKN2 *** (MESH) Pick a node from window
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C -- written by Ray J. Meyers 21 June, 1990
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C --
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C --PICKN2 puts a cursor on the screen, finds the associated world
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C -- coordinates and then locates and returns the node closest
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C -- to those coordinates.
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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
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C -- XN - IN - the x coordinates of the nodes
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C -- yN - IN - the y coordinates of the nodes
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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 -- NDRES - OUT - the node id selected
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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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DIMENSION XN(*), YN(*)
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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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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 100
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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 ' // 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, *100)
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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 mesh 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 -- FIND THE NEAREST NODE
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DISMIN = 10E+30
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DO 10 I = 1, NUMNPF
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X = XRES - XN(I)
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Y = YRES - YN(I)
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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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NDRES = I
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END IF
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10 CONTINUE
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RETURN
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100 CONTINUE
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RETURN 1
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END
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