functions in ylmdec.i - a


    alm= accumulate(n, f, mesh, rcap, rtrack, pts, dylm, flux, nrpp)  

Do N batches (approximately rays_per_batch each, default 13000) of  
rays from file F, MESH = hydra_mesh(F), analyzing the symmetry of  
a capsule of radius RCAP (all rays tangent to this sphere),  
tracing the rays only down to radius RTRACK (>1.001*RCAP).  
This routine is designed to be called several times successively  
to get better statistics.  PTS, DYLM, FLUX, and NRPP are all updated.  
PTS = unit vectors in directions of points on capsule surface  
      defaults to bucky(3,1): 1280 points with an intrinsic  
      fidelity of about 1% out to l=12  
      use bucky(4,1,domega), dylm= get_ylm(pts,lmax,list)*domega(-,..)  
      to get 5120 points and intrinsic fidelity of about 0.2% at l=12  
DYLM = ylm*domega for PTS  
FLUX = accumulated flux at each of PTS; units are power/area  
NRPP = accumulated number of rays per point of capsule surface  
ALM = 91 coefficients of Ylm up to l=12 corresponding to FLUX  
      l= [0, 1,1, 2,2,2, 3,3,3,3, 4,4,4,4,4, ...]  
      m= [0, 0,1, 0,1,2, 0,1,2,3, 0,1,2,3,4, ...]  
Interpreted function, defined at i/ylmdec.i   line 158