Hello. Im currently making a map where there is a moving helicopter ( a bit like atix) i want ladders to have the helicopter as its parent so that as it flys around rooftops, players can climb into it (its a ze map). Now i cant see a "parent" field in func_ladder but ive seen maps where theres a ladder attached to a moving object. Can someone please advise me how to do this.

edit: i think ive worked it out, i applied an invisible ladder texture to it