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71 lines
2.0 KiB
71 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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SUBROUTINE SUBTRI (NPER, NEWPER, X, Y, NID, XSUB, YSUB, NIDSUB,
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& M1, M2, IADD, ITRI, XCEN, YCEN)
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C***********************************************************************
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C SUBROUTINE SUBPER = PUTS A SUBREGION'S PERIMETER INTO THE NPERIM
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C ARRAYS
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C***********************************************************************
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DIMENSION X (NPER), Y (NPER), NID (NPER)
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DIMENSION XSUB (NPER), YSUB (NPER), NIDSUB (NPER)
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C PUT SIDE ONE AND TWO INTO THE PERIMETER LIST
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KOUNT = 0
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DO 100 I = 1, M1 + M2 + 1
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KOUNT = KOUNT + 1
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J = I + IADD
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IF (J .GT. NPER)J = J - NPER
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XSUB (KOUNT) = X (J)
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YSUB (KOUNT) = Y (J)
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NIDSUB (KOUNT) = NID (J)
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100 CONTINUE
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C PUT SIDE THREE INTO THE LIST
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XDIF = XCEN - XSUB (KOUNT)
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YDIF = YCEN - YSUB (KOUNT)
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XINT = XDIF / DBLE(M1)
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YINT = YDIF / DBLE(M1)
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DO 110 I = 1, M1 - 1
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KOUNT = KOUNT + 1
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XSUB (KOUNT) = XSUB (KOUNT - 1) + XINT
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YSUB (KOUNT) = YSUB (KOUNT - 1) + YINT
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NIDSUB (KOUNT) = (ITRI * 100000) + M1 - I + 1
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110 CONTINUE
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C ENTER THE CENTER POINT
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KOUNT = KOUNT + 1
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XSUB (KOUNT) = XCEN
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YSUB (KOUNT) = YCEN
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NIDSUB (KOUNT) = 100000
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C PUT SIDE FOUR INTO THE LIST
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ITRI2 = ITRI + 2
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IF (ITRI2 .GT. 3)ITRI2 = ITRI2 - 3
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XDIF = X (IADD + 1) - XCEN
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YDIF = Y (IADD + 1) - YCEN
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XINT = XDIF / DBLE(M2)
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YINT = YDIF / DBLE(M2)
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DO 120 I = 1, M2 - 1
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KOUNT = KOUNT + 1
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XSUB (KOUNT) = XSUB (KOUNT - 1) + XINT
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YSUB (KOUNT) = YSUB (KOUNT - 1) + YINT
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NIDSUB (KOUNT) = (100000 * ITRI2) + I + 1
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120 CONTINUE
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NEWPER = KOUNT
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RETURN
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END
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