HelixCopier

From fmepedia

This is a very simple custom transformer created as a response to Christmas Tree Challenge. It's as simple as placing three ExpressionEvaluators that calculate X, Y, and Z of a t-number copy of the entering feature according to the following formulas:

x(t)=cos(t)
y(t)=sin(t)
z(t)=t

Two multipliers (Z and R) allow aligning different numbers of copies along one imaginative helix.

Here is how the result may look when just four features enter the transformer (three boxes and one point):

Try to make your own tree - here is the workspace and HelixCopier custom transformer (the transformer is already embedded into workspace, download it only if you are going to use it in other workspaces).