1 /* $Id$ */

     2 

     3 /** @file transport_type.h Base types related to transport. */

     4 

     5 #ifndef TRANSPORT_TYPE_H

     6 #define TRANSPORT_TYPE_H

     7 

     8 typedef uint16 UnitID;

     9 

    10 enum TransportType {

    11 	/* These constants are for now linked to the representation of bridges

    12 	 * and tunnels, so they can be used by GetTileTrackStatus_TunnelBridge.

    13 	 * In an ideal world, these constants would be used everywhere when

    14 	 * accessing tunnels and bridges. For now, you should just not change

    15 	 * the values for road and rail.

    16 	 */

    17 	TRANSPORT_BEGIN = 0,

    18 	TRANSPORT_RAIL = TRANSPORT_BEGIN,

    19 	TRANSPORT_ROAD,

    20 	TRANSPORT_WATER,

    21 	TRANSPORT_AIR,

    22 	TRANSPORT_END,

    23 	INVALID_TRANSPORT = 0xff,

    24 };

    25 

    26 #endif /* TRANSPORT_TYPE_H */