jMonkeyEngine
PhysicsGhostObjects "bodyEnter", "bodyExit" "Colliders as Triggers"
add collision areas bodyEnter, bodyExit I have observed that in unity there are these functions and they really are very practical, mainly because when doing body in jmonkey engine it detects many collisions and this brings many problems when activating events since for example a sound repeats many ... I leave a 2-minute vide of example unity to understand the concept ..
https://www.youtube.com/watch?v=m0fjrQkaES4
I'm kind of against this. It's a trivial thing for users to implement with their own data structures and would require JME to implement a lot of almost-always-unnecessary book-keeping to provide the equivalent functionality.
JME is not Unity. It chooses to be more light-weight in some areas in the name of efficiency and letting users do things in more than one way.
That being said, if someone comes up with a way to do this that isn't garbage, we'll consider it... it's just very likely that any implementation will be bad.
