C Copyright(C) 1999-2020 National Technology & Engineering Solutions C of Sandia, LLC (NTESS). Under the terms of Contract DE-NA0003525 with C NTESS, the U.S. Government retains certain rights in this software. C C See packages/seacas/LICENSE for details C -*- Mode: fortran -*- C======================================================================= SUBROUTINE SPLXYZ (XN, YN, XN3, YN3, ZN3, ATRIB, & NSPL1, RSA, ZSA, ZS2A, DISTA, SCRA, & SLLFT, SLRGT, RDTHET, SWEEP, NOSCAL ) C======================================================================= C --*** SPLXYZ *** (GEN3D) Calculate 3D coordinates for Double-surface C Spline projection C -- Written by Greg Sjaardema - 01/08/90 C -- C --SPLXYZ calculates the coordinate array for the 3D spline translations. C -- C --Parameters: C -- XN, YN - IN - the 2D coordinates, destroyed C -- XN3, YN3, ZN3 - OUT - the 3D coordinates C -- IXNP - IN - the new index for each node C -- NRNP - IN - the number of new nodes generated for each node C -- ZCORD - SCRATCH - size = NNREPL, holds z coordinate for transformations C -- C --Common Variables: C -- Uses NDIM, NUMNP of /DBNUMS/ C -- Uses NDIM3, NUMNP3 of /DBNUM3/ C -- Uses DOTRAN, NNREPL, DIM3, NRTRAN, D3TRAN, ZGRAD, C -- CENTER, NUMCOL, NUMROW of /PARAMS/ INCLUDE 'gs_dbnums.blk' INCLUDE 'gs_dbnum3.blk' INCLUDE 'gs_params.blk' PARAMETER (BINGO = 1.0E38) PARAMETER (TOLER = 1.0E-8) INTEGER XSWEEP, YSWEEP, SPHERI, SWEEP PARAMETER (XSWEEP = 10) PARAMETER (YSWEEP = 1) PARAMETER (SPHERI = 11) REAL XN(NUMNP), YN(NUMNP), & XN3(NUMNP3), YN3(NUMNP3), ZN3(NUMNP3) REAL ATRIB(NUMEL) REAL RSA(NSPL1), ZSA(NSPL1), ZS2A(NSPL1), DISTA(NSPL1), & SCRA(NSPL1) C ... NOTE: Only sllft(1) and slrgt(1) are used, (2) left for comp. with gen3d REAL SLLFT(2), SLRGT(2) LOGICAL RDTHET, NOSCAL rad = 0.0 xt = 0.0 yt = 0.0 PI = ATAN2(0.0, -1.0) C ... Check for valid options... IF (RDTHET .AND. NOSCAL) THEN CALL PRTERR('ERROR', 'Cannot use NOSCALE with ANGULAR spline') RETURN END IF C ... Convert angles from degrees to radians IF (RDTHET) THEN DO 10 IPT = 1, NSPL1 RSA(IPT) = RSA(IPT) * PI / 180.0 10 CONTINUE END IF CALL SPLINE (RSA, ZSA, NSPL1, SLLFT(1), SLRGT(1), ZS2A, SCRA) C ... Calculate approximate distance along curve. Distance is computed C as the straight line distance of the segments. Accurate for C smooth curves; bad for non-smooth curves. C ... If 'NOSCALE' is set, then the spline must be linear and C we use the input RSA values for the distance. IF (NOSCAL) THEN DO 20 IPT = 1, NSPL1 DISTA(IPT) = RSA(IPT) 20 CONTINUE ELSE IF (RDTHET) THEN DISTA(1) = ZSA(1) * SIN(RSA(1)) DO 30 IPT = 2, NSPL1 DISTA(IPT) = DISTA(IPT-1) + SQRT( & (ZSA(IPT) * SIN(RSA(IPT)) - & ZSA(IPT-1) * SIN(RSA(IPT-1)))**2 + & (ZSA(IPT) * COS(RSA(IPT)) - & ZSA(IPT-1) * COS(RSA(IPT-1)))**2) 30 CONTINUE ELSE DISTA(1) = RSA(1) DO 50 IPT = 2, NSPL1 DISTA(IPT) = SQRT( (RSA(IPT-1) - RSA(IPT))**2 + & (ZSA(IPT-1) - ZSA(IPT))**2 ) + DISTA(IPT-1) 50 CONTINUE END IF END IF C... Determine maximum radius of mesh RMAX = 0.0 RMIN = BINGO IF (SWEEP .EQ. SPHERI) THEN DO 80 INP = 1, NUMNP DX = XN(INP) DY = YN(INP) RMIN = MIN (RMIN, (DX**2 + DY**2)) RMAX = MAX (RMAX, (DX**2 + DY**2)) 80 CONTINUE RMIN = SQRT(RMIN) RMAX = SQRT(RMAX) ELSE IF (SWEEP .EQ. XSWEEP) THEN DO 82 INP = 1, NUMNP DY = YN(INP) RMIN = MIN (RMIN, DY) RMAX = MAX (RMAX, DY) 82 CONTINUE ELSE IF (SWEEP .EQ. YSWEEP) THEN DO 84 INP = 1, NUMNP DX = XN(INP) RMIN = MIN (RMIN, DX) RMAX = MAX (RMAX, DX) 84 CONTINUE END IF C... If there is not a node at 0,0 - RMIN will not equal zero, therefore, C we assume that if the spline starts at zero, the mesh also starts C at zero. IF (DISTA(1) .EQ. 0.0) THEN RMIN = 0.0 END IF IF (NOSCAL) THEN PROPA = 1.0 ELSE PROPA = (DISTA(NSPL1) - DISTA(1)) / (RMAX - RMIN) END IF C ... Echo spline data WRITE (*,*) ' ' WRITE (*,70) 'top spline', DISTA(NSPL1), PROPA 70 FORMAT (' Total length of ',A,T32,' = ',1PE12.5, & ', Proportion = ',1PE12.5) KLOA = 1 DO 100 INP = 1, NUMNP DX = XN(INP) DY = YN(INP) IF (SWEEP .EQ. SPHERI) THEN RAD = SQRT (DX**2 + DY**2) ELSE IF (SWEEP .EQ. XSWEEP) THEN RAD = DY ELSE IF (SWEEP .EQ. YSWEEP) THEN RAD = DX END IF RADA = DISTA(1) + PROPA * (RAD - RMIN) C ... Determine segment containing point and proportion within segment CALL HUNT (DISTA, NSPL1, RADA, KLOA) KLOA = MIN(NSPL1-1, MAX(1, KLOA)) C ... We want to map the X-Y plane onto the spline surface without C stretching. Therefore, calculate a new radius RNEW which is C the distance from the Z axis to the point on the spline such C that the arc length from R=0 to R=RAD is the distance RNEW. C The new X and Y coordinates corresponding to RNEW are calculated C as the proportion of RNEW / RAD. FIXR is added to RAD in case C RAD is 0; FIXR = 1 iff RAD = 0, else FIXR = 0 C --- On IEEE Machines, at least on Ultrix 4.0 IEEE, the SIGN C trick does not work since it defines a signed 0.0 IF (RAD .EQ. 0.0) THEN FIXR = 1.0 ELSE FIXR = 0.0 END IF C FIXR = SIGN(0.5, RAD) + SIGN(0.5, -RAD) PROP = (RADA - DISTA(KLOA)) / (DISTA(KLOA+1) - DISTA(KLOA)) RNEWA = RSA(KLOA) + PROP * (RSA(KLOA+1) - RSA(KLOA)) H = RSA(KLOA+1) - RSA(KLOA) A = (RSA(KLOA+1)-RNEWA) / H B = (RNEWA-RSA(KLOA)) / H ZT = A * ZSA(KLOA) + B * ZSA(KLOA+1) + * ((A**3-A) * ZS2A(KLOA)+(B**3-B) * ZS2A(KLOA+1)) * (H**2)/6. IF (RDTHET) THEN RSAV = RNEWA ZSAV = ZT ZT = ZSAV * COS(RSAV) RNEWA = ZSAV * SIN(RSAV) END IF IF (SWEEP .EQ. SPHERI) THEN C ... Spherical Sweep of Spline Surface XT = RNEWA * DX / (RAD + FIXR) YT = RNEWA * DY / (RAD + FIXR) ELSE IF (SWEEP .EQ. XSWEEP) THEN C ... Sweep spline along the X axis XT = DX YT = RNEWA * DY / (RAD + FIXR) ELSE IF (SWEEP .EQ. YSWEEP) THEN C ... Sweep spline along the X axis XT = RNEWA * DX / (RAD + FIXR) YT = DY END IF C$$$$ write (*,*) inp, xn(inp), yn(inp), xt, yt, zt ZN3(INP) = ZT YN3(INP) = YT XN3(INP) = XT 100 CONTINUE C ... Now do the attributes for all of the elements DO 370 IEL = 1, NUMEL ATRIB(IEL) = DIM3 370 CONTINUE RETURN END