Version: 0.0.4 (using Devel) Installed from: Compiled sources OS: Linux If I am using Step to simulate interacting particles, sometimes those particles can escape (eg by bouncing hard against each other). In my tests it happened from time to time that those particles escaped without me noticing this. This means that this simulation is no longer what I expect it to be, for example, because I _think_ I have X particles while in fact I am having only X-4 or something like that. Second example. In the "gas.step" simulation the simulation should stop as soon as a particle escapes from the "inside" of the simulated gas area. This could be implemented by creating a invisible "maximum allowed area". As soon as as something is leaving this area the simulation stops.
Good idea, I will implement it.