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54 lines
1.5 KiB
54 lines
1.5 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 KEEP3 (ITEST, LTEST, NBEGIN, NEND)
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C***********************************************************************
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C SUBROTINE KEEP3 = GETS AN ACCEPTABLE SIDE FOR FILLING TO KEEP A
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C TRIANGLE VALID
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C***********************************************************************
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DIMENSION ITEST (3), LTEST (3)
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C MAKE SURE THAT THE NBEGIN STARTS AT ONE OF THE CORNERS
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IF (NBEGIN .EQ. ITEST(1)) THEN
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NEND = ITEST(2)
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ELSEIF (NBEGIN .EQ. ITEST(2)) THEN
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NEND = ITEST(3)
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ELSEIF (NBEGIN .EQ. ITEST(3)) THEN
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NEND = ITEST(1)
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ELSE
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NBEGIN = ITEST(1)
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NEND = ITEST(2)
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ENDIF
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C FIND THE CORRECT ROW (THIS ALREADY ASSUMES THAT THE
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C SUM OF THE SMALLER TWO IS EQUAL TO THE LARGEST ONE)
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MMAX = MAX0 (LTEST(1), LTEST(2), LTEST(3))
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IF (LTEST(1) .EQ. MMAX) THEN
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IF (NBEGIN .EQ. ITEST(1)) THEN
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NBEGIN = ITEST(2)
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NEND = ITEST(3)
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ENDIF
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ELSEIF (LTEST(2) .EQ. MMAX) THEN
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IF (NBEGIN .EQ. ITEST(2)) THEN
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NBEGIN = ITEST(3)
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NEND = ITEST(1)
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ENDIF
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ELSE
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IF (NBEGIN .EQ. ITEST(3)) THEN
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NBEGIN = ITEST(1)
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NEND = ITEST(2)
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ENDIF
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ENDIF
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RETURN
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END
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