(svn r19453) -Codechange: split getting the initial aircraft position to a new function

src/airport.cpp

@@ -18,6 +18,7 @@
 #include "date_func.h"
 #include "settings_type.h"
 #include "newgrf_airport.h"
+#include "station_base.h"
 #include "table/strings.h"
 #include "table/airporttile_ids.h"
 
@@ -381,3 +382,25 @@ const AirportFTAClass *GetAirport(const byte airport_type)
 	if (airport_type == AT_DUMMY) return &_airportfta_dummy;
 	return AirportSpec::Get(airport_type)->fsm;
 }
+
+/**
+ * Get the vehicle position when an aircraft is build at the given tile
+ * @param hangar_tile The tile on which the vehicle is build
+ * @return The position (index in airport node array) where the aircraft ends up
+ */
+byte GetVehiclePosOnBuild(TileIndex hangar_tile)
+{
+	const Station *st = Station::GetByTile(hangar_tile);
+	const AirportFTAClass *apc = st->Airport();
+	/* When we click on hangar we know the tile it is on. By that we know
+	 * its position in the array of depots the airport has.....we can search
+	 * layout for #th position of depot. Since layout must start with a listing
+	 * of all depots, it is simple */
+	for (uint i = 0;; i++) {
+		if (st->GetHangarTile(i) == hangar_tile) {
+			assert(apc->layout[i].heading == HANGAR);
+			return apc->layout[i].position;
+		}
+	}
+	NOT_REACHED();
+}