Schroedingers-Hat/jsphys — comment on commit 15e1b2788e08fb5955a9fdba8bd3c584c4597655
File: jsphys_js/extendedObject.js line 192
By Schroedingers-Hat:

Yes to the former, sorta to the latter.
It displays where everything will be when you can first effect it.
This makes aiming in extreme conditions easy. It also helps me to check if various causal relations are consistent (such as shooting a bullet and destroying something.