rubidium@9723: /* $Id$ */
rubidium@9723: 
rubidium@9723: /** @file tunnelbridge_map.h Functions that have tunnels and bridges in common */
rubidium@9723: 
rubidium@9723: #ifndef TUNNELBRIDGE_MAP_H
rubidium@9723: #define TUNNELBRIDGE_MAP_H
rubidium@9723: 
rubidium@9723: #include "direction_func.h"
rubidium@9723: #include "core/bitmath_func.hpp"
rubidium@9723: #include "tile_map.h"
rubidium@9723: #include "bridge_map.h"
rubidium@9723: #include "tunnel_map.h"
rubidium@10455: #include "transport_type.h"
rubidium@9723: 
rubidium@9723: 
rubidium@9723: /**
glx@9732:  * Get the direction pointing to the other end.
glx@9732:  *
glx@9732:  * Tunnel: Get the direction facing into the tunnel
rubidium@9723:  * Bridge: Get the direction pointing onto the bridge
rubidium@9723:  * @param t The tile to analyze
rubidium@9723:  * @pre IsTileType(t, MP_TUNNELBRIDGE)
rubidium@9723:  * @return the above mentionned direction
rubidium@9723:  */
rubidium@9723: static inline DiagDirection GetTunnelBridgeDirection(TileIndex t)
rubidium@9723: {
rubidium@9723: 	assert(IsTileType(t, MP_TUNNELBRIDGE));
rubidium@9723: 	return (DiagDirection)GB(_m[t].m5, 0, 2);
rubidium@9723: }
rubidium@9723: 
rubidium@9723: /**
rubidium@9723:  * Tunnel: Get the transport type of the tunnel (road or rail)
rubidium@9723:  * Bridge: Get the transport type of the bridge's ramp
rubidium@9723:  * @param t The tile to analyze
rubidium@9723:  * @pre IsTileType(t, MP_TUNNELBRIDGE)
rubidium@9723:  * @return the transport type in the tunnel/bridge
rubidium@9723:  */
rubidium@9723: static inline TransportType GetTunnelBridgeTransportType(TileIndex t)
rubidium@9723: {
rubidium@9723: 	assert(IsTileType(t, MP_TUNNELBRIDGE));
rubidium@9723: 	return (TransportType)GB(_m[t].m5, 2, 2);
rubidium@9723: }
rubidium@9723: 
rubidium@9723: /**
rubidium@9723:  * Tunnel: Is this tunnel entrance in a snowy or desert area?
rubidium@9723:  * Bridge: Does the bridge ramp lie in a snow or desert area?
rubidium@9723:  * @param t The tile to analyze
rubidium@9723:  * @pre IsTileType(t, MP_TUNNELBRIDGE)
rubidium@9723:  * @return true if and only if the tile is in a snowy/desert area
rubidium@9723:  */
rubidium@9723: static inline bool HasTunnelBridgeSnowOrDesert(TileIndex t)
rubidium@9723: {
rubidium@9723: 	assert(IsTileType(t, MP_TUNNELBRIDGE));
rubidium@9723: 	return HasBit(_m[t].m4, 7);
rubidium@9723: }
rubidium@9723: 
rubidium@9723: /**
rubidium@9723:  * Tunnel: Places this tunnel entrance in a snowy or desert area, or takes it out of there.
rubidium@9723:  * Bridge: Sets whether the bridge ramp lies in a snow or desert area.
rubidium@9723:  * @param t the tunnel entrance / bridge ramp tile
rubidium@9723:  * @param snow_or_desert is the entrance/ramp in snow or desert (true), when
rubidium@9723:  *                       not in snow and not in desert false
rubidium@9723:  * @pre IsTileType(t, MP_TUNNELBRIDGE)
rubidium@9723:  */
rubidium@9723: static inline void SetTunnelBridgeSnowOrDesert(TileIndex t, bool snow_or_desert)
rubidium@9723: {
rubidium@9723: 	assert(IsTileType(t, MP_TUNNELBRIDGE));
rubidium@9723: 	SB(_m[t].m4, 7, 1, snow_or_desert);
rubidium@9723: }
rubidium@9723: 
rubidium@9723: /**
rubidium@9723:  * Determines type of the wormhole and returns its other end
rubidium@9723:  * @param t one end
rubidium@9723:  * @pre IsTileType(t, MP_TUNNELBRIDGE)
rubidium@9723:  * @return other end
rubidium@9723:  */
rubidium@9723: static inline TileIndex GetOtherTunnelBridgeEnd(TileIndex t)
rubidium@9723: {
rubidium@9723: 	assert(IsTileType(t, MP_TUNNELBRIDGE));
rubidium@9723: 	return IsTunnel(t) ? GetOtherTunnelEnd(t) : GetOtherBridgeEnd(t);
rubidium@9723: }
rubidium@9723: 
rubidium@9723: #endif /* TUNNELBRIDGE_MAP_H */