Nav icons of important locations (stations/planets/gates) that appear on the edge of the screen in relation to where the location is to the player's ship, so that if the player turn and head towards it, if they maintain course, they fly towards that location.. if you guys know what I mean. For a top down 2D layout.
Is there an efficient way to do such a thing? Because I can't see an easy way to do it while keeping the icons on the edge of the screen..
Code wise, how would you approach this problem?