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147 lines
4.6 KiB
147 lines
4.6 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 PICKNP (PROMPT, CURSOR, WINDOW,
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& NDIM, NUMNPF, XN, YN, ZN, HIDENP, MIDDEF,
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& IFLD, INTYP, RFIELD, NPRES, *)
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C=======================================================================
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C --*** PICKNP *** (MESH) Pick the nearest node
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C -- Written by Amy Gilkey - revised 03/07/88
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C --
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C --PICKNP picks a user-selected node. For cursor input, PICKNP puts
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C --a cursor on the screen, waits until the user positions the cursor,
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C --then translates the position into a 3D point by finding the nearest
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C --node. For character input, PICKNP gets an X,Y,Z set from the
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C --free-format fields (defaults are not allowed).
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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 -- CURSOR - IN - true iff cursor input
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C -- WINDOW - IN - true iff the coordinates are window versus object
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C -- coordinates
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C -- NDIM - IN - the number of dimensions
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C -- NUMNPF - IN - the number of nodes
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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 -- (only if WINDOW)
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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 -- (cursor input only)
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C -- IFLD - IN/OUT - the free-format field index (character input only)
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C -- INTYP - IN - the free-format field types (character input only)
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C -- RFIELD - IN - the free-format real fields (character input only)
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C -- NPRES - OUT - the returned node
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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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LOGICAL CURSOR
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LOGICAL WINDOW
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REAL XN(*), YN(*), ZN(*)
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LOGICAL HIDENP(*)
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LOGICAL MIDDEF
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INTEGER INTYP(*)
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REAL RFIELD(*)
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CHARACTER*80 XPRMPT
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CHARACTER CH
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IF (CURSOR) THEN
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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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ELSE
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C --Get the X,Y,Z point from the free-format fields, no defaults
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IF (WINDOW .OR. (NDIM .NE. 3)) THEN
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XPRMPT = PROMPT // ' X, Y'
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ELSE
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XPRMPT = PROMPT // ' X, Y, Z'
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END IF
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NEED = NDIM
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IF (WINDOW) NEED = 2
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CALL FFNEED (IFLD, INTYP, 'R', NEED,
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& XPRMPT(:LENSTR(XPRMPT)), *110)
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CALL FFREAL (IFLD, INTYP, RFIELD,
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& 'X', 0.0, XRES, *110)
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CALL FFREAL (IFLD, INTYP, RFIELD,
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& 'Y', 0.0, YRES, *110)
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IF (.NOT. (WINDOW .OR. (NDIM .NE. 3))) THEN
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CALL FFREAL (IFLD, INTYP, RFIELD,
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& 'Z', 0.0, ZRES, *110)
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END IF
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END IF
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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 (WINDOW .AND. NDIM .EQ. 3) THEN
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IF (HIDENP(INP)) GOTO 100
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END IF
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X = XRES - XN(INP)
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Y = YRES - YN(INP)
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IF (WINDOW .OR. (NDIM .NE. 3)) THEN
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DIS = X*X + Y*Y
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ELSE
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Z = ZRES - ZN(INP)
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DIS = X*X + Y*Y + Z*Z
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END IF
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IF (DIS .LT. DISMIN) THEN
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DISMIN = DIS
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NPRES = 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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