- remove some global headers from AI headers, to avoid pollution
- change how ATC owns the ‘player’ FGAIAircraft so reset works
- ensure AIAircraft controllers are cleared on unbind for reset
FGAISchedule::update can be time consuming. Preempt when necessary to
avoid simulation lags, and call it every sim iteration, until the flight
plan is complete.
AIManager had unfortunate code to pass some state to the traffic-manager; this is no longer required since traffic schedules hold onto their AI-Aircraft directly as needed.
* Improved groundnetwork routing algorithm. Don't uncesscarily block taxiways. Instead, use a "just-in-time" blocking system. The unblocking algorithm still needs some work, but the current version is already a major improvement over the previous version.
* Some tweaks to the handover from ground to tower controller. Aircraft could refuse to take-off of even refuse to taxi onto the runway. This now seems to be solved.
/sim/ATC/radius should be a nummeric estimate of the size of your aircraft. A small aircraft fits into a large parking, but a large aircraft does not fit into a small parking space. Because the AI part of radius is also used for slightly different purposes (prioritizing gate assignmments, the given valuem may deviate slightly from the real aircraft size. See http:/wiki.flightgear.org/Aircraft.radii for an overview of currently used values for the redius property.
/sim/ATC/flight-type can be any one of "ga", "cargo", "gate", "mil-fighter", "mil-cargo", or "vtol". See http://wiki.flightgear.org/Interactive_traffic#A_technical_perspective for more information.
optionally, the property /sim/ATC/airline can be set set to a three letter icao airline code. By way of illustration, I will commit a number of startup preset files setting these properties shortly.
Also did some more finetuning to the traffic mananger routing algorithm can be any one of "ga", "cargo", "gate", "mil-fighter", "mil-cargo", or "vtol". See http://wiki.flightgear.org/Interactive_traffic#A_technical_perspective for more information.
optionally, the property /sim/ATC/airline can be set set to a three letter icao airline code. By way of illustration, I will commit a number of startup preset files setting these properties shortly.
Also did some more finetuning to the traffic mananger routing algorithm.
Traffic Manager:
* Just continue routing until we run out of flights. This change removes one of the major requirements for setting the "Home port" field.
* Add a time restriction requirement for the aircraft scheduler; this became necessary after removing the limited-to-home-port routing restriction.
* Added a new field to the heuristics calculation: take into account whether an aircraft has already been used in a previous session. Rotate aircraft assignments for greater variability across sessions.
* Added a revision number to the cache files, so that old cache results, which are no longer compatible with the new file format, are discarded.
Groundnetwork and traffic control:
* Added a revision number to the cache files, so that old and incompatible results are discarded.
* The caching algorithm probably didn't store the correct data for airports that were processed while the user was quite far away. This is now corrected by checking whether the cached elevation data are equal to the generic airport elevation.
AIAircraft:
* I've been searching for the infamous aircraft bend-over-backward bug, that can occur during initialization, but to no avail yet. The only variable potentially responsible (tgt_vs) wich can explain the irregular jumping behavior, as well as the weird pitch results is initialized in AIAircraft's only constructor (through AIBase), and I can't find any situation in the ground handling code where this variable could get bizarre values. But,
* a couple of tgt_vs. calculations appear to be completely redundant. This value was calculated twice inside the ProcessFlightplan function, and subsequently again in the updateSecondaryTargetValues function. I have removed the calculations in the process flightplan function, without any apparent side effect.
- Fixed a bug in AI aircraft ground steering code: When aircraft were not moving, the value of headingchangeRate kept increasing to insane levels. Although this was clamped to a maximum of 30 degrees per second, the initial rate could still push the aircraft in the wrong direction. In practice, this bug would be visible when an AI aicraft would be pushed back, when it tended to veer to the right.
- Make sure that the aircraft slows down well ahead of the pushback point. This change ensures that the AC will actually reach the pushback point. It also ensures a slightly tighter steering range.
- AI ground steering rate is tuned to 30 degrees per second at a nominal taxispeed of 15. I now modulate the heading adjustment rate by manipulating the adjustment using a non-linear function (the sqrt). This allows for a slightly tighter turn radius at speeds < 15 and slightly looser turns at speeds > 15.
- The AI Flightplan generation code can return false. This can be used to determine whether any additional AI aircraft may be created. Currently, the function returns false when no more parkings are available. This should limit the build-up of huge AIAircraft tower stacks.
- The ground network can now graphically display all aircraft actitivy on the ground network by using a virtual marker system.
issue is numerical problems in _wgs84_inverse, triggered by the traffic-manager
testing enormous distances geodetically.
Changes
- refactor AISchedule::update, so the aircraft approximate position
calculation is simpler.
- refactor AIAircraft to no longer use exceptions as a return value mechanism
- change AISchedule::update to use cartesian math for in-visible-range check
* Changed the runway XX. ATC message to actually report the real
designated departure runway
* In case of multiple active runways, select the one with a heading that is
closest to the direction of the ultimate departure destination / lines up
with the arrival path.
- Moved AIModels/Traffic Manager related AI functions to a new file
- Rewrote the traffic manager so that the containers use pointers to
objects instead of the objects themselves, which will allow for a
more flexible memory management.
- Rewrote parts of the airport groundnetwork code, also because the
stl containers now contain object pointers instead of the objects
themselves.
- Fixed an uninitialized iterator in the AI distance tracking code
- Fixed flawed logic in some of the traffic controller's while loops
- Added a tower controller, which paces take-off behavior of AITraffic
in a more realistic way.
- Various other minor fixes and fine tuning.
maintain a resonable distance from each other while taxiing on the same
route. The current code does not yet take crossing routes or aircraft
taxiing into opposite directions into account.
work for ground based distance separation of AIAircraft.
Traffic manager initialization related changes:
- Schedules initialize "on the fly", instead of during initialization
- Invalid routes are no longer deleted, but marked as BOGUS and ignored
- Changed loading order from a distance based prioritization to a point-
score based prioritization, resulting in a much faster establisment of
AIAircraft near the user's plane.
Preparatory work for ground-based separation of Aircraft.
- The groundnetwork findShrortestRoute function not only returns a list
of waypoints, but also a list of taxi "segments" (a.k.a. taxiways).
- The taxiway list is stored in the Flightplan, and updated everytime
a new taxi leg is created.
* Use "const string&" rather than "string" in function calls when appropriate.
* Use "const Point3D&" instead of "Pint3D" in function calls when appropriate.
* Improved course calculation in calc_gc_course_dist()
* Safer thread handling code.
Vassilii Khachaturov:
Dont use "const Point3D&" for return types unless you're absolutely sure.
Erik Hofman:
* Use SGD_(2)PI(_[24]) as defined in simgear/constants.h rather than
calculating it by hand every time.
I just heard from John Wojnaroski that you and he are going to work on getting
a flightgear demo machine up for the linux expo thursday and Friday. John
indicated that he would very much like to get a CVS version with the new
traffic code up and running before the expo.
Okay, here's the latest update to the tarffic manager/AI Manager. AITraffic
can now fly multiple routes and be initialized while sitting statically at
airports.
