hydra> v3d_help;

 v3d.sl      version: 1.2.1 , 2011-05-03

 Routines available:
   General:  v3d_ 'setup, 'help, 'list 
   Shapes:  v3d_ 'cube, 'cone, 'cylinder, 'roche, 'sphere, 'spheroid, 'torus
     ancillary:  v3d_ 'soft_cutoff, 'merge_max, 'smooth_box, 'max_box, 'smooth_2d
   Composite: v3d_sphere_line, v3d_sphere_ring
   Advanced: v3d_sphere_rlup, '_cyl_azlup, '_2dto3d, '_histxy, 'reproject
   Functions:  v3d_r3dsq, v3d_f_generic
   Display:  v3d_view, v3d_project, save_image_file = NULL or <filename_string>
     x,y[,e] points:  v3d_evtimg
   Monte-Carlo:  v3d_mc_cells, v3d_mc_points,
                 v3d_doppler_points

     see also: http://space.mit.edu/home/dd/v3d.html
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