Hi. So, I recently got a chance to pick this back up. In principle, everything is finished: I have a set of signs which are designed as per the U.S. FAA regs (FAA AC-150-5340-18C, Standards for Airport Sign Systems, and FAA AC-150-5345-44G, Specification for Taxiway and Runway Signs).
I also have a script for generating .stg file entries. Features: - can read in airport data in either apt.dat or runways.dat format. - will generate sign placements either for a single airport, a list of airports (a list of ICAOs in a file), every airport in apt.dat or runways.dat (but not heliports or seaplane bases), or every airport in apt.dat that has the "has runway distance remaining signs" flag set. - can place signs using any of the three layout methods given by the FAA regs. - makes sure that there are no signs placed on top of intersecting or nearby runways or taxiways. Specifically, it makes sure that no signs are placed within 50' of any other runway/taxiway at the airport. It attempts to adjust the positioning of a sign to avoid such a conflict, omitting the sign entirely if it'd have to be moved by more than 50' along the runway length, as per the FAA regs. I'd like to contribute this to FlightGear -- I think they'd make a nice addition to the scenery at the airports where it'd be appropriate to have them. However, I'm stuck on one thing that I'm hoping those who build scenery will advise: what's the best way to write this stuff out? Is the best option to: - have the script determine the tile numbers, go to the .stg files, and insert the sign entries directly? - have the script create an "installation" script, into which the sign entries are embedded (e.g. as a here document); such a script could also have a removal option, to take the signs back out? - do things monolithically, or by airport (could be lots of files if doing all relevant airports)? To be of most use to the project, how should this script write its info? -c P.S. As an aside, the routines for determining whether a sign hits a runway/taxiway, and adjusting its position, could be trivially adapted to get beacons and windsocks off of runways where that happens currently. I'd be happy to do that. Yes, the right thing to do is to fix the numbers in apt.dat/runways.dat. But in the short term, replacing a wrong location that puts a beacon right in the middle of a runway with another nearby wrong value that *doesn't* put the beacon on top of a runway seems like a good idea to me. -- Chris Metzler [EMAIL PROTECTED] (remove "snip-me." to email) "As a child I understood how to give; I have forgotten this grace since I have become civilized." - Chief Luther Standing Bear
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