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69 lines
2.0 KiB
69 lines
2.0 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 DONRM2 (NODES, ISBND, COSIN, NUMEL, LINK, X, Y,
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$ NLINK, NUMNP)
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C=======================================================================
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integer NODES(*)
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logical isbnd(*)
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REAL X(*), Y(*), COSIN(2,*)
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INTEGER LINK(NLINK, *)
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parameter (tol = 1.0e-6)
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do 10 inod = 1, numnp
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nodes(inod) = 0
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10 continue
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do 30 ilnk = 1, nlink
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do 20 iel = 1, numel
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nodes(link(ilnk, iel)) = 1
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20 continue
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30 continue
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do 60 iel = 1, numel
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do 50 iseg=1,nlink
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if (iseg .eq. nlink) then
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isegp1 = 1
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else
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isegp1 = iseg + 1
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end if
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XI = x( link(ISEG,iel) )
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YI = y( link(ISEG,iel) )
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XJ = x( link(ISEGp1,iel) )
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YJ = y( link(isegp1,iel) )
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DX = XI - XJ
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DY = YI - YJ
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RMAG = SQRT ( DX**2 + DY**2)
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cosin(1, link(iseg, iel)) = cosin(1, link(iseg, iel)) -
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$ dy / rmag
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cosin(2, link(iseg, iel)) = cosin(2, link(iseg, iel)) +
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$ dx / rmag
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cosin(1, link(isegp1, iel)) = cosin(1, link(isegp1, iel)) -
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$ dy / rmag
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cosin(2, link(isegp1, iel)) = cosin(2, link(isegp1, iel)) +
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$ dx / rmag
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50 continue
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60 continue
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do 70 inod = 1, numnp
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if (nodes(inod) .ne. 0) then
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if (abs(cosin(1, inod)) .gt. tol .or.
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$ abs(cosin(2, inod)) .gt. tol) then
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nodes(inod) = -1
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isbnd(inod) = .TRUE.
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end if
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end if
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70 continue
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RETURN
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END
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