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99 lines
2.8 KiB
99 lines
2.8 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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SUBROUTINE SETN02 (MXND, NXL, LXK, KXL, LINE, NEND, NODE, N0, N2)
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C***********************************************************************
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C SUBROUTINE SETN02 = PICKS THE NEXT LINE AROUND THE ELEMENTS ATTACHED
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C TO LINE WITH ONE END AT NEND, AND THE OTHER END
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C NOT AT NODE, AND FROM THE CONNECTIVITY OF THE
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C ELEMENTS DETERMINES THE BOUNDING ANGULAR LINES
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C AND NODES.
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C***********************************************************************
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DIMENSION NXL(2, 3*MXND)
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DIMENSION LXK(4, MXND), KXL(2, 3*MXND)
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K1 = KXL (1, LINE)
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K2 = KXL (2, LINE)
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C FIND THE NEXT LINE IN K1
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DO 100 I = 1, 4
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IL = LXK (I, K1)
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IF ((NXL (1, IL) .EQ. NEND) .AND.
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& (NXL (2, IL) .NE. NODE)) THEN
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L1 = IL
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NNEW1 = NXL (2, IL)
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GOTO 110
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ELSEIF ((NXL (2, IL) .EQ. NEND) .AND.
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& (NXL (1, IL) .NE. NODE)) THEN
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L1 = IL
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NNEW1 = NXL (1, IL)
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GOTO 110
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ENDIF
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100 CONTINUE
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CALL MESSAGE('** PROBLEMS IN SETN02 FINDING NNEW1 **')
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RETURN
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110 CONTINUE
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C FIND THE NEXT LINE IN K2
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DO 120 I = 1, 4
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IL = LXK (I, K2)
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IF ((NXL (1, IL) .EQ. NEND) .AND.
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& (NXL (2, IL) .NE. NODE)) THEN
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NNEW2 = NXL (2, IL)
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GOTO 130
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ELSEIF ((NXL (2, IL) .EQ. NEND) .AND.
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& (NXL (1, IL) .NE. NODE)) THEN
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NNEW2 = NXL (1, IL)
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GOTO 130
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ENDIF
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120 CONTINUE
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CALL MESSAGE('** PROBLEMS IN SETN02 FINDING NNEW2 **')
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RETURN
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130 CONTINUE
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C NOW DETERMINE WHICH OF THESE NODES IS N0 AND WHICH IS N2 BASED
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C ON THE FACT THAT THE CONNECTIVITY OF THE ELEMENTS LINES IS ALWAYS IN
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C COUNTER-CLOCKWISE ORDER
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DO 140 I = 1, 4
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IF (LXK (I, K1) .EQ. LINE) THEN
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I0 = I - 1
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I2 = I + 1
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IF (I .EQ. 1) THEN
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I0 = 4
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ELSEIF (I .EQ. 4) THEN
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I2 = 1
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ENDIF
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L0 = LXK (I0, K1)
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L2 = LXK (I2, K1)
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IF (L0 .EQ. L1) THEN
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N0 = NNEW1
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N2 = NNEW2
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ELSEIF (L2 .EQ. L1) THEN
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N0 = NNEW2
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N2 = NNEW1
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ELSE
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CALL MESSAGE('** PROBLEMS IN SETN02 FINDING N0 '//
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& 'AND N2 **')
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ENDIF
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GOTO 150
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ENDIF
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140 CONTINUE
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CALL MESSAGE('** PROBLEMS IN SETN02 FINDING LINE AGAIN **')
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150 CONTINUE
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RETURN
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END
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