Options for graphics objects are specified as JavaScript dictionaries. Unless specified otherwise, common default options are
  color | azure blue | 
  opacity | 1 | 
Additional object-specific options are listed below each.
arrow( begin, end, options ) — two-dimensional arrow from beginning to end
box( width, depth, height, options ) — box of specified dimensions centered at the origin
  center | vector position, default [0,0,0] | 
cylinder( radius, height, options ) — cylinder of specified dimensions
  axis | arbitrary vector direction, default [0,0,1] | 
  center | vector position, default [0,0,0] | 
  openEnded | Boolean to draw cylinder ends, default true
 | 
  steps | integer determining surface smoothness, default 20 | 
line( points, options ) — two- or three-dimensional line joining an array of points
  endcaps | Boolean to include spheres to smooth joints, default false
 | 
  radius | float for drawing the line as an extended cylinder | 
point( point, options ) — two- or three-dimensional point
  size | 1 | 
sphere( radius, options ) — sphere of specified radius
  center | vector position, default [0,0,0] | 
  steps | integer determining surface smoothness, default 20 | 
text( string, point, options ) — string of text at the two- or three-dimensional point
  color | black | 
  fontSize | 14 |