Listener/trigger

Hey,



I’d like to trigger some actions when two objects collide (let’s say that when a ball collides a wall for instance, I’d like to trigger a knocking sound). Do I have to code my own listeners/triggers or is there some methods already present in jME to do that ?



Thx !

https://wiki.jmonkeyengine.org/legacy/doku.php/jme3:advanced:physics_listeners