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Now start Flightgear, and choose UFO as your aircraft.
Once Flightgear has been started, fly with the UFO
upon the place you want the model to be positioned.
Let's say we want to position the catii-iii.xml object at the
beginning of a taxiway taking to a runway. We stop the UFO just above this intersection and press the M key, a Select Model window will open up , here you see the Flightgear/data/Models/ directory content. You can browse the dir until you find find your model, LMB ( LMB = Left Mouse Button) click on it and close the window. A green text appears on the bottom left of Flightgear screen , showing the selected model.
can point the mouse on the scenery ground and LMB again, the CAT II/III ground marking model will be positioned there. Of course, it has not the correct orientation , it's partly covered by the surrounding terrain, we have to adjust that.
Fly closer to the ground with the UFO, so that you can see it better.
Now press TAB (or Ctrl-I), and use the sliders to adjust latitude/longitude/elevation/heading.
Now that the model is correctly positioned, press d key to dump
data model to terminal. That will print a few lines on the console giving you the coordinates of current object. You will save those coordinates into a scenery objects file in the next step. If you don't do that, next time you run Flightgear it will know nothing about the new object.
In the terminal window, you get three sections printed out by the UFO with very detailed
informations about what's going on, we need the line at the end.
e000n50/e008n50/3089154.stg is the secenery object file where this object's coordinates have to be saved.
Default place where to find e000n50 directory is inside Flightgear/data/Scenery/Objects/ dir. You have to open the 3089154.stg file with any text editor, add the following line and save it again:
OBJECT_SHARED Models/Tabu/catii-iii.xml 8.57928135 50.03667992 105.9972 111.1
Now you have your object's position saved, and it will appear inside the scenery every time you start Flightgear
again. That's it :-)