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93 lines
2.9 KiB
93 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 ROTZM (RDMESH, NNPSUR, NPSURF, XN, YN, ZN,
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& ROTMSH, ROTMAT, ROTCEN, ZMMESH, ZMCEN, *)
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C=======================================================================
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C --*** ROTZM *** (MESH) Find the object center within zoom limits
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C -- Written by Amy Gilkey - revised 09/09/87
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C --
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C --ROTZM averages the coordinates of all surface nodes within the zoom
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C --limits to find the center of the object visible within the zoom
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C --window.
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C --
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C --Parameters:
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C -- RDMESH - IN - the zoom mesh limits (may not be square)
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C -- NNPSUR - IN - the number of surface nodes
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C -- NPSURF - IN - the node numbers of the surface nodes
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C -- XN, YN, ZN - IN - the nodal coordinates (unrotated)
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C -- ROTMSH - IN - true iff the coordinates need to be rotated
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C -- ROTMAT - IN - the rotation matrix
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C -- ROTCEN - IN - the rotation center
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C -- ZMMESH - OUT - the zoom mesh limits (may not be square)
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C -- ZMCEN - OUT - the mesh center for the rotation
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C -- * - return statement if no nodes within window; message is printed
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PARAMETER (KLFT=1, KRGT=2, KBOT=3, KTOP=4, KNEA=5, KFAR=6)
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REAL RDMESH(KTOP)
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INTEGER NPSURF(*)
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REAL XN(*), YN(*), ZN(*)
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LOGICAL ROTMSH
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REAL ROTMAT(3,3), ROTCEN(3)
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REAL ZMMESH(KTOP)
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REAL ZMCEN(3)
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NIN = 0
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XTOT = 0.0
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YTOT = 0.0
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ZTOT = 0.0
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DO 100 IX = 1, NNPSUR
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INP = NPSURF(IX)
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IF (ROTMSH) THEN
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CALL BL_ROTATE (1, 1, ROTMAT, ROTCEN,
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& XN(INP), YN(INP), ZN(INP), X, Y, Z)
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ELSE
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X = XN(INP)
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Y = YN(INP)
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Z = ZN(INP)
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END IF
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IF ((X .GE. RDMESH(KLFT)) .AND. (X .LE. RDMESH(KRGT)) .AND.
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& (Y .GE. RDMESH(KBOT)) .AND. (Y .LE. RDMESH(KTOP))) THEN
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NIN = NIN + 1
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XTOT = XTOT + X
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YTOT = YTOT + Y
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ZTOT = ZTOT + Z
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END IF
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100 CONTINUE
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IF (NIN .LE. 0) THEN
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CALL PRTERR ('CMDERR',
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& 'No nodes within specified zoom window')
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GOTO 110
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END IF
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XTOT = XTOT / NIN
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YTOT = YTOT / NIN
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ZTOT = ZTOT / NIN
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CALL UNROT (1, 1, ROTMAT, ROTCEN,
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& XTOT, YTOT, ZTOT, XCEN, YCEN, ZCEN)
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XDIF = ROTCEN(1) - XCEN
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YDIF = ROTCEN(2) - YCEN
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ZMMESH(KLFT) = RDMESH(KLFT) + XDIF
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ZMMESH(KRGT) = RDMESH(KRGT) + XDIF
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ZMMESH(KBOT) = RDMESH(KBOT) + YDIF
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ZMMESH(KTOP) = RDMESH(KTOP) + YDIF
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ZMCEN(1) = XCEN
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ZMCEN(2) = YCEN
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ZMCEN(3) = ZCEN
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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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