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AI Traffic: Difference between revisions
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Re ordered Pushback section, Positive Examples first, caveats last
(Points on Runway and Backtracking routes) |
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''Backtracking'' | ''Backtracking'' | ||
[[File:Using the runway to backtrack to the threshold.jpg|thumb|AI Groudnet configuration for backtracking in absence of parallel taxiway]] | |||
Certain airports do not have taxiways along the runway and aircrafts will 'backtrack' on the runway itself to reach the threshold (and pivot on a turnaround area to align for take off). In this scenario, you must place nodes and segments to form a route on the runway to guide the AI aircrafts all the way from their access point to the threshold, including on the turnaround area | Certain airports do not have taxiways along the runway and aircrafts will 'backtrack' on the runway itself to reach the threshold (and pivot on a turnaround area to align for take off). In this scenario, you must place nodes and segments to form a route on the runway to guide the AI aircrafts all the way from their access point to the threshold, including on the turnaround area | ||
Create a second branch from the existing route, which goes to another runway. To do so, press [ctrl-a] to deselect all objects. Then, select the point where you want to branch off from. Select this point using a left mouse click, while holding down the shift key. Since TaxiDraw is still in node connect mode, simply left-clicking would have resulted in placing a new node. With this node selected, continue drawing. Repeat this procedure until all runways are connected. | Create a second branch from the existing route, which goes to another runway. To do so, press [ctrl-a] to deselect all objects. Then, select the point where you want to branch off from. Select this point using a left mouse click, while holding down the shift key. Since TaxiDraw is still in node connect mode, simply left-clicking would have resulted in placing a new node. With this node selected, continue drawing. Repeat this procedure until all runways are connected. | ||
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==== Refining the network: Pushback routes ==== | ==== Refining the network: Pushback routes ==== | ||
With the above-mentioned refinements, the ground network should be fully working with one notable exception. Aircraft will be driving forward when leaving the gate, making a sharp turn (while probably destroying themselves and the terminal building in the process). To prevent this, a ''push back'' route should be created. A push back route consists of at least one or more taxiway segments that have the "PushBack Route" property set to true. The last of these segments should be terminated by a PushBack HoldPoint network node. Pushback routes are optional (if you like the terminal crashing scenario described above). | With the above-mentioned refinements, the ground network should be fully working with one notable exception. Aircraft will be driving forward when leaving the gate, making a sharp turn (while probably destroying themselves and the terminal building in the process). To prevent this, a ''push back'' route should be created. A push back route consists of at least one or more taxiway segments that have the "PushBack Route" property set to true. The last of these segments should be terminated by a PushBack HoldPoint network node. Pushback routes are optional (if you like the terminal crashing scenario described above). | ||
'''Examples of simple valid pushback routes''' (Left: If the taxiway is bidirectional | Centre: If the taxiway is not bidirectional | Right: With shared Pushback Holding point) | |||
[[File:MultiDirectionnal Pushback Route in Taxidraw.jpg|400px|Valid AI Groudnet pushback for multi directional taxiway]] | |||
[[File:UniDirectionnal Pushback Route in Taxidraw.jpg|400px|Valid Pushback Route on Un directional taxiway]] | |||
[[File:Shared Pushback Holding Point in Taxidraw.jpg|400px|Shared Pushback Holding Point]] | |||
[[File:Roll Forward Gate in Taxidraw.jpg|thumb|Invalid Park Pos Exist route : at and angle with Parking Position]] | [[File:Roll Forward Gate in Taxidraw.jpg|thumb|Invalid Park Pos Exist route : at and angle with Parking Position]] | ||
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The "Roll Forward on my current heading" rules also applies to Parking position with no pushback route. These are often used for smaller propeller aircrafts which "pivot" on their parking position before rolling forward. You cannot currently replicate this pivot behaviour in Flightgear AI | The "Roll Forward on my current heading" rules also applies to Parking position with no pushback route. These are often used for smaller propeller aircrafts which "pivot" on their parking position before rolling forward. You cannot currently replicate this pivot behaviour in Flightgear AI | ||