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AI Traffic: Difference between revisions
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= SIDs / STARs = | |||
SID is an acronym for [[Standard Instrument Departure]]. Likewise, STAR is an acronym for [[Standard Terminal Arrival Route]]. Directly after takeoff, in particular at busy airports, aircraft follow a standard flight path, that will keep them safely separated from arriving traffic, avoid ground obstructions, and also keeps traffic away from populated areas as much as possible. Currently, steps are in progress to allow FlightGear traffic to follow SIDs. Ultimately, the plan is to provide SID and STAR data in a format that can also be used by the user controlled Aircraft's Flight Management Computer. Currently, some sample data exist in the form of a PropertyList formatted XML file that contains a list of way points. | SID is an acronym for [[Standard Instrument Departure]]. Likewise, STAR is an acronym for [[Standard Terminal Arrival Route]]. Directly after takeoff, in particular at busy airports, aircraft follow a standard flight path, that will keep them safely separated from arriving traffic, avoid ground obstructions, and also keeps traffic away from populated areas as much as possible. Currently, steps are in progress to allow FlightGear traffic to follow SIDs. Ultimately, the plan is to provide SID and STAR data in a format that can also be used by the user controlled Aircraft's Flight Management Computer. Currently, some sample data exist in the form of a PropertyList formatted XML file that contains a list of way points. | ||
This section of the AI Traffic documentation is meant as a stub that keeps track of the current development. At the moment of writing, some proof-of-concept data for EHAM SIDs will be committed to the World Scenery Repository, along with some experimental code in FlightGear to make use of this data. Note that this data is meant to be just that; a proof-of-concept. User contributions will be accepted as soon as the format has stabilized. | This section of the AI Traffic documentation is meant as a stub that keeps track of the current development. At the moment of writing, some proof-of-concept data for EHAM SIDs will be committed to the World Scenery Repository, along with some experimental code in FlightGear to make use of this data. Note that this data is meant to be just that; a proof-of-concept. User contributions will be accepted as soon as the format has stabilized. | ||
= Appendix: Special Notes = | |||
== Performance == | |||
With recent versions of FlightGear, we have much better performance than before so realistic density of traffic is currently possible even for slower computers. For those who are still afraid, there is an, as of yet, unpublished feature: set a new property "/sim/traffic-manager/proportion" to any value between 0 and 1 in your preferences.xml. During program start up, the traffic manager draws a random number (between 0 and 1) for each aircraft, and if that random number is smaller than the value specified in /sim/traffic-manager/proportion, the aircraft is added, otherwise it is discarded. In essence, only the specified proportion of aircraft will be loaded. | With recent versions of FlightGear, we have much better performance than before so realistic density of traffic is currently possible even for slower computers. For those who are still afraid, there is an, as of yet, unpublished feature: set a new property "/sim/traffic-manager/proportion" to any value between 0 and 1 in your preferences.xml. During program start up, the traffic manager draws a random number (between 0 and 1) for each aircraft, and if that random number is smaller than the value specified in /sim/traffic-manager/proportion, the aircraft is added, otherwise it is discarded. In essence, only the specified proportion of aircraft will be loaded. | ||
Unfortunately you can't change this at runtime yet, so you need a little bit trial and error! However, it should allow the combination of slower computers and dense traffic files. | Unfortunately you can't change this at runtime yet, so you need a little bit trial and error! However, it should allow the combination of slower computers and dense traffic files. | ||
= Related content = | |||
* [[Flightplan XML formats]] | * [[Flightplan XML formats]] | ||
* [[Status of AI in FlightGear]] | * [[Status of AI in FlightGear]] | ||