pick object: pick object for instancing
pick spline: pick spline for radius reference. This lets you create cylindrical phyllotaxis with variable radius (see images below). Notice that script workst in spline's local coordinate system. Y axis is central axis of final geometry. Distance along local X axis is used as radius.
animation: newly created objects willbe animated according to spline animation. See sample movie below.
max. elements: number of elements in pattern
constant size: controls scale of instances (see images below)
create: creates pattern