Wednesday, June 28, 2006

Taxi Signs

Starting with X-Plane 850 (not quite beta yet), the apt.dat file will allow you to build taxiway signs into airport layouts. We're using a simplified version of the sign-specification language from FlightGear (which shares apt.dat data) - you can read the on-going spec/discussion here.

The syntax isn't final, but here's a rough idea of what it will look like:

20 42.363178 -71.012238 110.0 {@R}22R-4L{@@}4L-22R
and here's an example sign (not the same as the apt.dat example listed above):

The basic idea is: a sign has a latitude and logitude location and a heading (in this case 110, so the front of the sign is visible when parked to the east). The text of the sign is plain text - special characters are put in braces {} and special formatting starts with a @ character. @R turns the sign red, @Y yellow, etc. and @@ changes to the back side of the sign. Arrows are specified with a ^ followed by the direction, so a left-downward arrow is ^ld.

1 comment:

bokepacha said...

It start to be really huge! Great work and thanks for the explanation, seems very usefull to have an idea of what to do.