#2583 [Enhancement] Ability to switch on flight trace/ trajectory markers shown in the simulator for any vehicle.

[Drei Eck]

I would like to see the ability to leave a trace in the air where I have flown. As an option within FlightGear itself that can be turned on for every aircraft.

I know that it is a feature that can be definied by-aircraft (the Antonov AN-225 has it for example, called "trajectory markers"), but this enables the use of the feature only for aircrafts which have it available.

[James Turner]

This should be do-able by creating an 'Add-on' module for FG, re-using the AN-225 code: I gues it adds a marker model every few seconds or every 1nm flown? It's not such an efficient way to do it, but kind of works.

Other nicer option is to use the 'flight path history' data we record internally for the Map's 'show flight history' view; this would be very efficient but needs some custom code to render that path in the main 3D view.

[Anonymous]

Mind you that the ones that are implemented don't seem to clean up old markers and instead slowly moves them down. It would probably be better both for precision and perf to not move them and instead delete them after some timeout.

[Drei Eck]

Mind you that the ones that are implemented don't seem to clean up
old markers and instead slowly moves them down. It would probably be
better both for precision and perf to not move them and instead
delete them after some timeout.

Yes, and the timeout should be user-configurable (including "never").

I remember the "lleave a track feature" from MS Flight Simulator 98,
which I used almost all the time.

Regards!