Thank you Hugo for your quick reply!
We will look into ForceField to mimick the Van der Waals forces. I will get back to you with the implementation details of the helix.
On a related note: I assume that you internally calculate the distances between all frames to compute possible collisions? Is this exposed somewhere? We need to have the euclidean distances, which are easy to compute, but we would like to avoid computing them twice.
Thanks!
Kolja