smatz@8579: /* $Id$ */
smatz@8579: 
smatz@8579: /** @file tunnelbridge_map.h Functions that have tunnels and bridges in common */
smatz@8579: 
smatz@8579: #ifndef TUNNELBRIDGE_MAP_H
smatz@8579: #define TUNNELBRIDGE_MAP_H
smatz@8579: 
rubidium@8596: #include "direction_func.h"
rubidium@8635: #include "core/bitmath_func.hpp"
rubidium@8635: #include "tile_map.h"
smatz@8693: #include "bridge_map.h"
smatz@8693: #include "tunnel_map.h"
smatz@8579: 
smatz@8579: 
smatz@8579: /**
frosch@8977:  * Get the direction pointing to the other end.
frosch@8977:  *
frosch@8977:  * Tunnel: Get the direction facing into the tunnel
smatz@8579:  * Bridge: Get the direction pointing onto the bridge
smatz@8579:  * @param t The tile to analyze
smatz@8579:  * @pre IsTileType(t, MP_TUNNELBRIDGE)
smatz@8579:  * @return the above mentionned direction
smatz@8579:  */
smatz@8579: static inline DiagDirection GetTunnelBridgeDirection(TileIndex t)
smatz@8579: {
smatz@8579: 	assert(IsTileType(t, MP_TUNNELBRIDGE));
smatz@8579: 	return (DiagDirection)GB(_m[t].m5, 0, 2);
smatz@8579: }
smatz@8579: 
smatz@8579: /**
smatz@8579:  * Tunnel: Get the transport type of the tunnel (road or rail)
smatz@8579:  * Bridge: Get the transport type of the bridge's ramp
smatz@8579:  * @param t The tile to analyze
smatz@8579:  * @pre IsTileType(t, MP_TUNNELBRIDGE)
smatz@8579:  * @return the transport type in the tunnel/bridge
smatz@8579:  */
smatz@8579: static inline TransportType GetTunnelBridgeTransportType(TileIndex t)
smatz@8579: {
smatz@8579: 	assert(IsTileType(t, MP_TUNNELBRIDGE));
smatz@8579: 	return (TransportType)GB(_m[t].m5, 2, 2);
smatz@8579: }
smatz@8579: 
smatz@8579: /**
smatz@8579:  * Tunnel: Is this tunnel entrance in a snowy or desert area?
smatz@8579:  * Bridge: Does the bridge ramp lie in a snow or desert area?
smatz@8579:  * @param t The tile to analyze
smatz@8579:  * @pre IsTileType(t, MP_TUNNELBRIDGE)
smatz@8579:  * @return true if and only if the tile is in a snowy/desert area
smatz@8579:  */
smatz@8579: static inline bool HasTunnelBridgeSnowOrDesert(TileIndex t)
smatz@8579: {
smatz@8579: 	assert(IsTileType(t, MP_TUNNELBRIDGE));
smatz@8579: 	return HasBit(_m[t].m4, 7);
smatz@8579: }
smatz@8579: 
smatz@8579: /**
smatz@8579:  * Tunnel: Places this tunnel entrance in a snowy or desert area, or takes it out of there.
smatz@8579:  * Bridge: Sets whether the bridge ramp lies in a snow or desert area.
smatz@8579:  * @param t the tunnel entrance / bridge ramp tile
smatz@8579:  * @param snow_or_desert is the entrance/ramp in snow or desert (true), when
smatz@8579:  *                       not in snow and not in desert false
smatz@8579:  * @pre IsTileType(t, MP_TUNNELBRIDGE)
smatz@8579:  */
smatz@8579: static inline void SetTunnelBridgeSnowOrDesert(TileIndex t, bool snow_or_desert)
smatz@8579: {
smatz@8579: 	assert(IsTileType(t, MP_TUNNELBRIDGE));
smatz@8579: 	SB(_m[t].m4, 7, 1, snow_or_desert);
smatz@8579: }
smatz@8579: 
smatz@8693: /**
smatz@8693:  * Determines type of the wormhole and returns its other end
smatz@8693:  * @param t one end
smatz@8693:  * @pre IsTileType(t, MP_TUNNELBRIDGE)
smatz@8693:  * @return other end
smatz@8693:  */
smatz@8693: static inline TileIndex GetOtherTunnelBridgeEnd(TileIndex t)
smatz@8693: {
smatz@8693: 	assert(IsTileType(t, MP_TUNNELBRIDGE));
smatz@8693: 	return IsTunnel(t) ? GetOtherTunnelEnd(t) : GetOtherBridgeEnd(t);
smatz@8693: }
smatz@8693: 
smatz@8579: #endif /* TUNNELBRIDGE_MAP_H */