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208 lines
6.9 KiB
208 lines
6.9 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 GETSIZ (XNOLD, YNOLD, NXKOLD, LINKEG, LISTEG, BMESUR,
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& MLINK, NPNOLD, NPEOLD, NNXK, REMESH, REXMIN, REXMAX, REYMIN,
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& REYMAX, IDIVIS, SIZMIN, EMAX, EMIN, X, Y, SIZE)
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C***********************************************************************
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C SUBROUTINE GETSIZ = GETS THE SIZE OF AN ELEMENT EDGE BASED ON THE
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C OLD MESH SIZE AT THE GIVEN X,Y LOCATION AND THE
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C RELATIVE MEASURE OF THE ERROR ESTIMATOR AT THAT
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C LOCATION
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C***********************************************************************
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DIMENSION XNOLD(NPNOLD), YNOLD(NPNOLD)
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DIMENSION NXKOLD(NNXK, NPEOLD)
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DIMENSION LINKEG(2, MLINK), LISTEG(4 * NPEOLD), BMESUR(NPNOLD)
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LOGICAL INSIDE, BAD
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C ASSUME A LINEAR REDUCTION FACTOR FROM R0 TO R1 WHERE R0 IS THE
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C DESIRED REDUCTION A 0. NORMALIZED ERROR MEASURE AND R1 IS A DESIRED
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C REDUCTION AT 1.0 NORMALIZED ERROR MEASURE
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C FIND THE ELEMENT THAT THIS POINT FALLS INTO
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DELX = (REXMAX - REXMIN) / DBLE(IDIVIS)
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DELY = (REYMAX - REYMIN) / DBLE(IDIVIS)
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IX = INT((X - REXMIN) / DELX) + 1
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IF (X .GE. REXMAX) IX = IDIVIS
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IY = INT((REYMAX - Y) / DELY) + 1
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IF (Y .LE. REYMIN) IY = IDIVIS
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INDEX = (IY * 10) + IX
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IBEGIN = LINKEG (1, INDEX)
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IEND = IBEGIN + LINKEG(2,INDEX) - 1
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DO 110 I = IBEGIN, IEND
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KELEM = LISTEG(I)
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XEMIN = XNOLD (NXKOLD (1, KELEM))
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XEMAX = XNOLD (NXKOLD (1, KELEM))
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YEMIN = YNOLD (NXKOLD (1, KELEM))
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YEMAX = YNOLD (NXKOLD (1, KELEM))
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DO 100 IC = 2, 4
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XEMIN = AMIN1 (XEMIN, XNOLD (NXKOLD (IC, KELEM)))
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XEMAX = AMAX1 (XEMAX, XNOLD (NXKOLD (IC, KELEM)))
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YEMIN = AMIN1 (YEMIN, YNOLD (NXKOLD (IC, KELEM)))
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YEMAX = AMAX1 (YEMAX, YNOLD (NXKOLD (IC, KELEM)))
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100 CONTINUE
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IF ((X .LT. XEMIN) .OR. (X .GT. XEMAX) .OR.
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& (Y .LT. YEMIN) .OR. (Y .GT. YEMAX)) THEN
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INSIDE = .FALSE.
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ELSE
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CALL INVMAP (X, Y,
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& XNOLD(NXKOLD (1, KELEM)), YNOLD(NXKOLD (1, KELEM)),
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& XNOLD(NXKOLD (2, KELEM)), YNOLD(NXKOLD (2, KELEM)),
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& XNOLD(NXKOLD (3, KELEM)), YNOLD(NXKOLD (3, KELEM)),
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& XNOLD(NXKOLD (4, KELEM)), YNOLD(NXKOLD (4, KELEM)),
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& XI, ETA, INSIDE)
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ENDIF
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IF (INSIDE) THEN
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KIN = KELEM
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GOTO 170
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ENDIF
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110 CONTINUE
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C THERE IS A POSSIBILITY THAT THE POINT IS ON AN ARC WHICH IS NOT
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C INCLUDED IN THE ORIGINAL MESH - THIS MUST BE CHECKED.
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DTEST = 1.E15
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DO 130 I = IBEGIN, IEND
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KELEM = LISTEG(I)
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DO 120 IC = 1, 4
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JC = IC + 1
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IF (JC .EQ. 5) JC = 1
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X1 = XNOLD (NXKOLD (IC, KELEM))
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X2 = XNOLD (NXKOLD (JC, KELEM))
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Y1 = YNOLD (NXKOLD (IC, KELEM))
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Y2 = YNOLD (NXKOLD (JC, KELEM))
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C GET THE PARAMETERS FOR THE LINE
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CALL DLPARA (X1, Y1, X2, Y2, XM1, B1, BAD)
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C GET DISTANCE FOR VERTICAL LINE
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IF (BAD) THEN
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DTRY = ABS(X1 - X)
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XTRY = X1
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YTRY = Y
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C GET DISTANCE FOR HORIZONTAL LINE
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ELSE IF (ABS(XM1) .LT. .000001) THEN
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DTRY = ABS(Y1 - Y)
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XTRY = X
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YTRY = Y1
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C GET PERPENDICULAR DISTANCE TO ARBITRARY LINE
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ELSE
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XM2 = -1./XM1
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B2 = Y - (XM2*X)
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XTRY = (B2 - B1)/(XM1 - XM2)
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YTRY = (XM1*XTRY) + B1
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DTRY = SQRT((X - XTRY)**2 + (Y - YTRY)**2)
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END IF
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C CHECK THE INTERSECTION TO MAKE SURE THAT IT CUTS THE LINE SEGMENT
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C WE HAVE
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IF ((XTRY .GE. AMIN1(X1, X2)) .AND.
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& (XTRY .LE. AMAX1(X1, X2)) .AND.
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& (YTRY .GE. AMIN1(Y1, Y2)) .AND.
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& (YTRY .LE. AMAX1(Y1, Y2)) ) THEN
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C NOW GET THE SHORTEST INTERSECTION AND GET NEEDED SIZE VALUE BASED ON
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C THE XTRY AND YTRY LOCATION
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IF (DTRY .LT. DTEST) THEN
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DTEST = DTRY
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INSIDE = .TRUE.
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DT = SQRT( (X1 - X2)**2 + (Y1 - Y2)**2)
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D1 = SQRT( (XTRY - X1)**2 + (YTRY - Y1)**2)
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RATIO = D1 / DT
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IF (IC .EQ. 1) THEN
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XI = RATIO
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ETA = 0.
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ELSEIF (IC .EQ. 2) THEN
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XI = 0.
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ETA = RATIO
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ELSEIF (IC .EQ. 3) THEN
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XI = 1.0 - RATIO
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ETA = 0.
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ELSE
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XI = 0.
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ETA = 1.0 - RATIO
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ENDIF
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KIN = KELEM
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ICIN = IC
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JCIN = JC
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ENDIF
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ENDIF
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120 CONTINUE
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130 CONTINUE
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C NOW CHECK THE ELEMENT THAT HAS BEEN FOUND AND MAKE SURE THAT IT IS
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C A ELEMENT ALONG THE SIDE OF THE MESH AND THAT THE EDGE CLOSEST IS
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C NOT SHARED BY ANY OTHER ELEMENT.
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IF (INSIDE) THEN
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DO 150 I = 1, NPEOLD
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IF (I .NE. KIN) THEN
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DO 140 IC = 1, 4
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JC = IC + 1
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IF (JC .EQ. 5) JC = 1
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IF ((IC .EQ. JCIN) .AND. (JC .EQ. ICIN)) THEN
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CALL MESSAGE('** ERROR WITH ELEMENT SIDE FOUND'//
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& ' BEING INTERIOR TO MESH IN GETSIZ **')
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INSIDE = .FALSE.
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GOTO 160
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ENDIF
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140 CONTINUE
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ENDIF
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150 CONTINUE
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160 CONTINUE
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ENDIF
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C THE ELEMENT HAS BEEN FOUND - NOW INTERPOLATE THE STRESS VALUE FOR
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C THIS LEVEL
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170 CONTINUE
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IF (INSIDE) THEN
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N1 = NXKOLD (1, KIN)
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N2 = NXKOLD (2, KIN)
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N3 = NXKOLD (3, KIN)
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N4 = NXKOLD (4, KIN)
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E1 = BMESUR(N1)
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E2 = BMESUR(N2)
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E3 = BMESUR(N3)
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E4 = BMESUR(N4)
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ERROR = E1 + ((E2 - E1) * XI) + ((E4 - E1) * ETA) +
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& ((E1 - E2 + E3 - E4) * XI * ETA)
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D1 = SQRT ( ((XNOLD(N2) - XNOLD(N1)) ** 2) +
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& ((YNOLD(N2) - YNOLD(N1)) ** 2) )
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D2 = SQRT ( ((XNOLD(N3) - XNOLD(N2)) ** 2) +
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& ((YNOLD(N3) - YNOLD(N2)) ** 2) )
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D3 = SQRT ( ((XNOLD(N4) - XNOLD(N3)) ** 2) +
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& ((YNOLD(N4) - YNOLD(N3)) ** 2) )
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D4 = SQRT ( ((XNOLD(N1) - XNOLD(N4)) ** 2) +
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& ((YNOLD(N1) - YNOLD(N4)) ** 2) )
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REDUC = EMAX - (ERROR * EMAX) + (ERROR * EMIN)
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SIZE = AMAX1 ((AMIN1 (D1, D2, D3, D4) * REDUC), SIZMIN)
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ELSE
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C ERROR HAS OCCURRED IN FINDING THE ELEMENT
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CALL MESSAGE('** ERROR - ENCLOSING ELEMENT NOT FOUND IN '//
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& 'GETSIZ **')
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ENDIF
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RETURN
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END
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