How to dump the angle of particles?

Hi, I can imagine a few possible answers to your question, but they are all highly contingent on exactly what you are trying to accomplish (e.g. what are you using for a “rotational harmonic spring?”).

I would recommend you write up a more detailed description of what you are/trying to simulate and create a new post. See the post below for what information is needed so you can get the most accurate feedback.

Hope this helps.