Hi there, I'm looking to see if anyone has an elegant solution for storing the activation frame over pieces in an RBD sim. For example, piece40 has an @activation_frame = 1049. Let me know if you have any ideas!

I guess this could work, before your sim, create the attributes:


Then inside your sim:

The RBD Bullet Solver has an option in the output tab to export "age" and "active_age" as attributes. age is the time since the rbd piece first appeared in the sim, active_age is the time since the rbd was last activated - if you have pieces that become active, then inactive, then active again it will be reset every time it changes from inactive to active and 0 whenever the piece is inactive.
To get the active_age out of the sim, make sure you add it to the list of attributes in the output tab > transfer attributes.

From there, to get the activation frame, you can do: