section s of routines in drat.i

functions in drat.i - s

set_tolerances


    set_tolerances()  
 or old_tols= set_tolerances([tol1, tol2, lost_tol])  


returns the current tolerances for the ray tracking.  Initially,  
these are [1.e-3, 1.e-6, 0.0].  In the second form, sets new  
tolerances.  If any of TOL1, TOL2, or LOST_TOL is zero, that  
tolerance is restored to its default value.  If TOL1 is less  
than zero, the root polishing operation which requires TOL1  
and TOL2 is not done at all.  
Builtin function, documented at i0/drat.i   line 1276

SEE ALSO: track_rays, integ_flat, integ_linear, streak, snap

snap


    snap(f, rays)  
 or snap(f, rays, slimits)  


  returns the time-integrated specific intensity for the rad-hydro  
  problem dumped in file F, on the specified RAYS, with the  
  specified limits SLIMITS on the transport integrals.  
  The first dimension of RAYS may be length 3, 5, or 6 to represent  
  the ray(s) in TDG/DIRT coordinates (x,y,theta), "best" coordinates  
  (x,y,z,theta,phi), or internal coordinates (cos,sin,y,z,x,r),  
  respectively.  The remaining dimensions of RAYS, if any, will be  
  called "nrays" below.  
  The SLIMITS parameter, if present, is the value of the s-coordinate  
  -- position along the ray -- at which to start and stop the  
  integration of the transport equation.  SLIMITS may be nil, a 1-D  
  array of length 2, or a 2-by-nrays array.  Each component of SLIMITS  
  is [s_start, s_stop]; if s_stop line 195

SEE ALSO: reset_options, streak, streak_save, integ_flat, integ_linear,
streak_times, form_rays, best_rays, dirt_rays, internal_rays

snap_worker


    snap_worker(transp, selfem, time)  


The snap function actually works by replacing the drat_compress  
with snap_worker.  See the source for snap in drat.i for details.  
Interpreted function, defined at i0/drat.i   line 274

streak


    streak(f, rays)  
 or streak(f, rays, slimits)  


  returns the transparency and self-emission as functions of time for  
  the rad-hydro problem dumped in file F, on the specified RAYS, with  
  the specified limits SLIMITS on the transport integrals.  
  The first dimension of RAYS may be length 3, 5, or 6 to represent  
  the ray(s) in TDG/DIRT coordinates (x,y,theta), "best" coordinates  
  (x,y,z,theta,phi), or internal coordinates (cos,sin,y,z,x,r),  
  respectively.  The remaining dimensions of RAYS, if any, will be  
  called "nrays" below.  
  The SLIMITS parameter, if present, is the value of the s-coordinate  
  -- position along the ray -- at which to start and stop the  
  integration of the transport equation.  SLIMITS may be nil, a 1-D  
  array of length 2, or a 2-by-nrays array.  Each component of SLIMITS  
  is [s_start, s_stop]; if s_stop line 40

SEE ALSO: reset_options, snap, streak_save, integ_flat, integ_linear,
streak_times, form_rays, best_rays, dirt_rays, internal_rays,
apply_funcs

streak_save


    streak_save, outname, f, rays  
 or streak_save, outname, f, rays, slimits  
 or streak_save, outfile, f, rays, slimits  


  is the same as the streak function, except that the results of  
  the transport calculation are placed into a PDB file called  
  OUTNAME, instead of being accumulated in memory.  All of the  
  options for the streak function are available, except for  
  drat_compress (which is set to streak_saver).  
  If the first argument is OUTFILE, a file variable instead of a  
  file name, then that file is used for output.  You can create  
  OUTFILE and add static variables to it with save (but do NOT call  
  add_record) which streak_save otherwise wouldn't know about.  
  The output file has history records at the same times as the  
  input file.  Each record contains "time" (a double scalar),  
  and the two arrays "transp", the transparency (between 0 and 1),  
  and "selfem", the self emission (which has the same units as  
  ekap in the file F).  The dimensions of transp and selfem  
  are ngroup-by-2-by-nrays (where nrays represents zero or more  
  dimensions, copied from the RAYS input array).  The RAYS and  
  SLIMITS inputs are placed into the output file as non-record  
  variables, and any variables in the drat_static option are  
  copied form F to the output file.  The gb and gav variables  
  are copied from F into the output file as well.  If the drat_glist  
  option is present, that is stored in the output file also.  
OPTIONS: all options available for streak except drat_compress,  
         drat_gb, drat_gav, drat_static  
  Interpreted function, defined at i0/drat.i   line 297