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234 lines
7.1 KiB
234 lines
7.1 KiB
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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C -*- Mode: fortran -*-
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C=======================================================================
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SUBROUTINE SPLXYZ (XN, YN, XN3, YN3, ZN3, ATRIB,
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& NSPL1, RSA, ZSA, ZS2A, DISTA, SCRA,
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& SLLFT, SLRGT, RDTHET, SWEEP, NOSCAL )
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C=======================================================================
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C --*** SPLXYZ *** (GEN3D) Calculate 3D coordinates for Double-surface
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C Spline projection
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C -- Written by Greg Sjaardema - 01/08/90
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C --
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C --SPLXYZ calculates the coordinate array for the 3D spline translations.
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C --
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C --Parameters:
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C -- XN, YN - IN - the 2D coordinates, destroyed
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C -- XN3, YN3, ZN3 - OUT - the 3D coordinates
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C -- IXNP - IN - the new index for each node
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C -- NRNP - IN - the number of new nodes generated for each node
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C -- ZCORD - SCRATCH - size = NNREPL, holds z coordinate for transformations
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C --
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C --Common Variables:
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C -- Uses NDIM, NUMNP of /DBNUMS/
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C -- Uses NDIM3, NUMNP3 of /DBNUM3/
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C -- Uses DOTRAN, NNREPL, DIM3, NRTRAN, D3TRAN, ZGRAD,
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C -- CENTER, NUMCOL, NUMROW of /PARAMS/
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INCLUDE 'gs_dbnums.blk'
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INCLUDE 'gs_dbnum3.blk'
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INCLUDE 'gs_params.blk'
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PARAMETER (BINGO = 1.0E38)
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PARAMETER (TOLER = 1.0E-8)
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INTEGER XSWEEP, YSWEEP, SPHERI, SWEEP
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PARAMETER (XSWEEP = 10)
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PARAMETER (YSWEEP = 1)
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PARAMETER (SPHERI = 11)
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REAL XN(NUMNP), YN(NUMNP),
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& XN3(NUMNP3), YN3(NUMNP3), ZN3(NUMNP3)
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REAL ATRIB(NUMEL)
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REAL RSA(NSPL1), ZSA(NSPL1), ZS2A(NSPL1), DISTA(NSPL1),
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& SCRA(NSPL1)
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C ... NOTE: Only sllft(1) and slrgt(1) are used, (2) left for comp. with gen3d
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REAL SLLFT(2), SLRGT(2)
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LOGICAL RDTHET, NOSCAL
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rad = 0.0
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xt = 0.0
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yt = 0.0
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PI = ATAN2(0.0, -1.0)
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C ... Check for valid options...
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IF (RDTHET .AND. NOSCAL) THEN
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CALL PRTERR('ERROR', 'Cannot use NOSCALE with ANGULAR spline')
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RETURN
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END IF
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C ... Convert angles from degrees to radians
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IF (RDTHET) THEN
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DO 10 IPT = 1, NSPL1
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RSA(IPT) = RSA(IPT) * PI / 180.0
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10 CONTINUE
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END IF
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CALL SPLINE (RSA, ZSA, NSPL1, SLLFT(1), SLRGT(1), ZS2A, SCRA)
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C ... Calculate approximate distance along curve. Distance is computed
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C as the straight line distance of the segments. Accurate for
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C smooth curves; bad for non-smooth curves.
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C ... If 'NOSCALE' is set, then the spline must be linear and
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C we use the input RSA values for the distance.
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IF (NOSCAL) THEN
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DO 20 IPT = 1, NSPL1
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DISTA(IPT) = RSA(IPT)
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20 CONTINUE
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ELSE
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IF (RDTHET) THEN
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DISTA(1) = ZSA(1) * SIN(RSA(1))
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DO 30 IPT = 2, NSPL1
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DISTA(IPT) = DISTA(IPT-1) + SQRT(
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& (ZSA(IPT) * SIN(RSA(IPT)) -
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& ZSA(IPT-1) * SIN(RSA(IPT-1)))**2 +
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& (ZSA(IPT) * COS(RSA(IPT)) -
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& ZSA(IPT-1) * COS(RSA(IPT-1)))**2)
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30 CONTINUE
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ELSE
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DISTA(1) = RSA(1)
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DO 50 IPT = 2, NSPL1
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DISTA(IPT) = SQRT( (RSA(IPT-1) - RSA(IPT))**2 +
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& (ZSA(IPT-1) - ZSA(IPT))**2 ) + DISTA(IPT-1)
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50 CONTINUE
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END IF
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END IF
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C... Determine maximum radius of mesh
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RMAX = 0.0
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RMIN = BINGO
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IF (SWEEP .EQ. SPHERI) THEN
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DO 80 INP = 1, NUMNP
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DX = XN(INP)
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DY = YN(INP)
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RMIN = MIN (RMIN, (DX**2 + DY**2))
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RMAX = MAX (RMAX, (DX**2 + DY**2))
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80 CONTINUE
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RMIN = SQRT(RMIN)
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RMAX = SQRT(RMAX)
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ELSE IF (SWEEP .EQ. XSWEEP) THEN
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DO 82 INP = 1, NUMNP
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DY = YN(INP)
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RMIN = MIN (RMIN, DY)
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RMAX = MAX (RMAX, DY)
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82 CONTINUE
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ELSE IF (SWEEP .EQ. YSWEEP) THEN
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DO 84 INP = 1, NUMNP
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DX = XN(INP)
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RMIN = MIN (RMIN, DX)
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RMAX = MAX (RMAX, DX)
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84 CONTINUE
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END IF
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C... If there is not a node at 0,0 - RMIN will not equal zero, therefore,
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C we assume that if the spline starts at zero, the mesh also starts
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C at zero.
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IF (DISTA(1) .EQ. 0.0) THEN
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RMIN = 0.0
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END IF
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IF (NOSCAL) THEN
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PROPA = 1.0
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ELSE
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PROPA = (DISTA(NSPL1) - DISTA(1)) / (RMAX - RMIN)
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END IF
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C ... Echo spline data
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WRITE (*,*) ' '
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WRITE (*,70) 'top spline', DISTA(NSPL1), PROPA
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70 FORMAT (' Total length of ',A,T32,' = ',1PE12.5,
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& ', Proportion = ',1PE12.5)
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KLOA = 1
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DO 100 INP = 1, NUMNP
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DX = XN(INP)
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DY = YN(INP)
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IF (SWEEP .EQ. SPHERI) THEN
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RAD = SQRT (DX**2 + DY**2)
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ELSE IF (SWEEP .EQ. XSWEEP) THEN
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RAD = DY
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ELSE IF (SWEEP .EQ. YSWEEP) THEN
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RAD = DX
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END IF
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RADA = DISTA(1) + PROPA * (RAD - RMIN)
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C ... Determine segment containing point and proportion within segment
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CALL HUNT (DISTA, NSPL1, RADA, KLOA)
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KLOA = MIN(NSPL1-1, MAX(1, KLOA))
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C ... We want to map the X-Y plane onto the spline surface without
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C stretching. Therefore, calculate a new radius RNEW which is
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C the distance from the Z axis to the point on the spline such
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C that the arc length from R=0 to R=RAD is the distance RNEW.
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C The new X and Y coordinates corresponding to RNEW are calculated
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C as the proportion of RNEW / RAD. FIXR is added to RAD in case
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C RAD is 0; FIXR = 1 iff RAD = 0, else FIXR = 0
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C --- On IEEE Machines, at least on Ultrix 4.0 IEEE, the SIGN
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C trick does not work since it defines a signed 0.0
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IF (RAD .EQ. 0.0) THEN
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FIXR = 1.0
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ELSE
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FIXR = 0.0
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END IF
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C FIXR = SIGN(0.5, RAD) + SIGN(0.5, -RAD)
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PROP = (RADA - DISTA(KLOA)) / (DISTA(KLOA+1) - DISTA(KLOA))
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RNEWA = RSA(KLOA) + PROP * (RSA(KLOA+1) - RSA(KLOA))
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H = RSA(KLOA+1) - RSA(KLOA)
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A = (RSA(KLOA+1)-RNEWA) / H
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B = (RNEWA-RSA(KLOA)) / H
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ZT = A * ZSA(KLOA) + B * ZSA(KLOA+1) +
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* ((A**3-A) * ZS2A(KLOA)+(B**3-B) * ZS2A(KLOA+1)) * (H**2)/6.
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IF (RDTHET) THEN
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RSAV = RNEWA
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ZSAV = ZT
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ZT = ZSAV * COS(RSAV)
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RNEWA = ZSAV * SIN(RSAV)
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END IF
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IF (SWEEP .EQ. SPHERI) THEN
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C ... Spherical Sweep of Spline Surface
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XT = RNEWA * DX / (RAD + FIXR)
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YT = RNEWA * DY / (RAD + FIXR)
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ELSE IF (SWEEP .EQ. XSWEEP) THEN
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C ... Sweep spline along the X axis
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XT = DX
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YT = RNEWA * DY / (RAD + FIXR)
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ELSE IF (SWEEP .EQ. YSWEEP) THEN
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C ... Sweep spline along the X axis
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XT = RNEWA * DX / (RAD + FIXR)
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YT = DY
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END IF
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C$$$$ write (*,*) inp, xn(inp), yn(inp), xt, yt, zt
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ZN3(INP) = ZT
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YN3(INP) = YT
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XN3(INP) = XT
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100 CONTINUE
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C ... Now do the attributes for all of the elements
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DO 370 IEL = 1, NUMEL
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ATRIB(IEL) = DIM3
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370 CONTINUE
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RETURN
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END
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