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60 lines
1.9 KiB
60 lines
1.9 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 CHCOND (NPER, NSA, SMANG, INDEX, IFIRST, N1, N2, N3,
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& N4, CHECK)
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C*********************************************************************
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C SUBROUTINE CHCOND = THIS SUBROUTINE CHECKS IF THE "NSA" ANGLES
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C SATISFIES THE CONDITIONS.
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C*********************************************************************
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C VARIABLES IN: NPER .... NUMBER OF POINTS IN THE REGION
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C NSA ..... NUMBER OF SOUGHT SMALLEST ANGLES
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C SMANG ... ARRAY OF SMALLEST ANGLES
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C INDEX ... POINTERS INTO THE ANGLE ARRAY
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C OUT: IFIRST... POINTER TO THE FIRST VERTEX
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C Mi ...... INTERVALS FOR THE PENTAGON REGION
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C CHECK ... .EQ. TRUE IF IT SATISFIES THE CONDITIONS
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C CALL BY: PICKM5.FOR
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C WRITTEN BY: HORACIO RECALDE DATE:FEB 15, 1988
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C************************************************************************
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PARAMETER (NSANG = 10)
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DIMENSION SMANG(NSA + 1), NAUX(NSANG), INDEX(NSA + 1)
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LOGICAL CHECK
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NSA2 = NSA/2
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C--- SORT THE INDEX ARRAY TO FIND THE 'NSA2' SMALLEST ANGLES
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CALL SORTIA (NSA, INDEX, NSA2, NAUX)
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IFIRST = NAUX(1)
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N1 = NAUX(2) - NAUX(1)
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N2 = NAUX(3) - NAUX(2)
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N3 = NAUX(4) - NAUX(3)
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N4 = NAUX(5) - NAUX(4)
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N5 = NPER - N1 - N2 - N3 - N4
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C--- CHECK COMPATIBILITY EQUATIONS
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IF ((N1 + N2 + N3 .LT. N4 + N5 + 2) .OR.
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& (N2 + N3 + N4 .LT. N5 + N1 + 2) .OR.
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& (N3 + N4 + N5 .LT. N1 + N2 + 2) .OR.
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& (N4 + N5 + N1 .LT. N2 + N3 + 2) .OR.
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& (N5 + N1 + N2 .LT. N3 + N4 + 2)) THEN
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CHECK = .FALSE.
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ELSE
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CHECK = .TRUE.
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ENDIF
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RETURN
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END
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