1 files changed, 52 insertions, 0 deletions
diff --git a/airport.h b/airport.h
new file mode 100644
index 000000000..71f8981c6
--- /dev/null
+++ b/airport.h
@@ -0,0 +1,52 @@
+#ifndef AIRPORT_H
+#define AIRPORT_H
+
+#include "airport_movement.h"
+
+enum {MAX_TERMINALS = 6};
+enum {MAX_HELIPADS  = 2};
+
+// Airport types
+enum {
+	AT_SMALL = 0,
+	AT_LARGE = 1,
+	AT_HELIPORT = 2,
+	AT_METROPOLITAN = 3,
+	AT_INTERNATIONAL = 4,
+	AT_OILRIG = 5
+};
+
+// do not change unless you change v->subtype too. This aligns perfectly with its current setting
+enum {
+	AIRCRAFT_ONLY = 0,
+	ALL = 1,
+	HELICOPTERS_ONLY = 2
+};
+
+// Finite sTate mAchine --> FTA
+typedef struct AirportFTAClass {
+	byte nofelements;						// number of positions the airport consists of
+	byte nofterminals;					// number of terminals this airport has
+	byte nofterminalgroups;			// terminals belong to so many groups (MAX is the nofterminals)
+	byte nofhelipads;						// number of helipads this airport has
+	byte nofhelipadgroups;			// helipads belong to so many groups (MAX is the nofhelipads)
+	byte entry_point;						// when an airplane arrives at this airport, enter it at position entry_point
+	byte acc_planes;						// accept airplanes or helicopters or both
+	uint16 *airport_depots;			// gives the position of the depots on the airports
+	struct AirportFTA *layout;	// state machine for airport
+} AirportFTAClass;
+
+// internal structure used in openttd - Finite sTate mAchine --> FTA
+typedef struct AirportFTA {
+	byte position;										// the position that an airplane is at
+	byte next_position;								// next position from this position
+	uint32 block;	// 32 bit blocks (st->airport_flags), should be enough for the most complex airports
+	byte heading;	// heading (current orders), guiding an airplane to its target on an airport
+	struct AirportFTA *next_in_chain;	// possible extra movement choices from this position
+} AirportFTA;
+
+void InitializeAirports();
+void UnInitializeAirports();
+const AirportFTAClass* GetAirport(const byte airport_type);
+
+#endif /* AIRPORT_H */