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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