OpenTTD Source  20241108-master-g80f628063a
tunnelbridge_map.h
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1 /*
2  * This file is part of OpenTTD.
3  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
4  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
5  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
6  */
7 
10 #ifndef TUNNELBRIDGE_MAP_H
11 #define TUNNELBRIDGE_MAP_H
12 
13 #include "bridge_map.h"
14 #include "tunnel_map.h"
15 
16 
26 inline DiagDirection GetTunnelBridgeDirection(Tile t)
27 {
28  assert(IsTileType(t, MP_TUNNELBRIDGE));
29  return (DiagDirection)GB(t.m5(), 0, 2);
30 }
31 
39 inline TransportType GetTunnelBridgeTransportType(Tile t)
40 {
41  assert(IsTileType(t, MP_TUNNELBRIDGE));
42  return (TransportType)GB(t.m5(), 2, 2);
43 }
44 
52 inline bool HasTunnelBridgeSnowOrDesert(Tile t)
53 {
54  assert(IsTileType(t, MP_TUNNELBRIDGE));
55  return HasBit(t.m7(), 5);
56 }
57 
66 inline void SetTunnelBridgeSnowOrDesert(Tile t, bool snow_or_desert)
67 {
68  assert(IsTileType(t, MP_TUNNELBRIDGE));
69  SB(t.m7(), 5, 1, snow_or_desert);
70 }
71 
78 inline TileIndex GetOtherTunnelBridgeEnd(Tile t)
79 {
80  assert(IsTileType(t, MP_TUNNELBRIDGE));
81  return IsTunnel(t) ? GetOtherTunnelEnd(t) : GetOtherBridgeEnd(t);
82 }
83 
84 
91 inline bool HasTunnelBridgeReservation(Tile t)
92 {
93  assert(IsTileType(t, MP_TUNNELBRIDGE));
94  assert(GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL);
95  return HasBit(t.m5(), 4);
96 }
97 
104 inline void SetTunnelBridgeReservation(Tile t, bool b)
105 {
106  assert(IsTileType(t, MP_TUNNELBRIDGE));
107  assert(GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL);
108  AssignBit(t.m5(), 4, b);
109 }
110 
117 inline TrackBits GetTunnelBridgeReservationTrackBits(Tile t)
118 {
119  return HasTunnelBridgeReservation(t) ? DiagDirToDiagTrackBits(GetTunnelBridgeDirection(t)) : TRACK_BIT_NONE;
120 }
121 
122 #endif /* TUNNELBRIDGE_MAP_H */
HasBit
constexpr debug_inline bool HasBit(const T x, const uint8_t y)
Checks if a bit in a value is set.
Definition: bitmath_func.hpp:103
AssignBit
constexpr T AssignBit(T &x, const uint8_t y, bool value)
Assigns a bit in a variable.
Definition: bitmath_func.hpp:200
SB
constexpr T SB(T &x, const uint8_t s, const uint8_t n, const U d)
Set n bits in x starting at bit s to d.
Definition: bitmath_func.hpp:58
GB
constexpr static debug_inline uint GB(const T x, const uint8_t s, const uint8_t n)
Fetch n bits from x, started at bit s.
Definition: bitmath_func.hpp:32
GetOtherBridgeEnd
TileIndex GetOtherBridgeEnd(TileIndex tile)
Starting at one bridge end finds the other bridge end.
Definition: bridge_map.cpp:59
bridge_map.h
Map accessor functions for bridges.
Tile
Wrapper class to abstract away the way the tiles are stored.
Definition: map_func.h:25
Tile::m7
debug_inline uint8_t & m7()
Primarily used for newgrf support.
Definition: map_func.h:185
Tile::m5
debug_inline uint8_t & m5()
General purpose.
Definition: map_func.h:161
DiagDirection
DiagDirection
Enumeration for diagonal directions.
Definition: direction_type.h:73
IsTileType
static debug_inline bool IsTileType(Tile tile, TileType type)
Checks if a tile is a given tiletype.
Definition: tile_map.h:150
MP_TUNNELBRIDGE
@ MP_TUNNELBRIDGE
Tunnel entry/exit and bridge heads.
Definition: tile_type.h:57
DiagDirToDiagTrackBits
TrackBits DiagDirToDiagTrackBits(DiagDirection diagdir)
Maps a (4-way) direction to the diagonal track bits incidating with that diagdir.
Definition: track_func.h:524
TrackBits
TrackBits
Allow incrementing of Track variables.
Definition: track_type.h:35
TRACK_BIT_NONE
@ TRACK_BIT_NONE
No track.
Definition: track_type.h:36
TransportType
TransportType
Available types of transport.
Definition: transport_type.h:19
TRANSPORT_RAIL
@ TRANSPORT_RAIL
Transport by train.
Definition: transport_type.h:27
GetOtherTunnelEnd
TileIndex GetOtherTunnelEnd(TileIndex tile)
Gets the other end of the tunnel.
Definition: tunnel_map.cpp:22
tunnel_map.h
Map accessors for tunnels.
IsTunnel
bool IsTunnel(Tile t)
Is this a tunnel (entrance)?
Definition: tunnel_map.h:23
SetTunnelBridgeSnowOrDesert
void SetTunnelBridgeSnowOrDesert(Tile t, bool snow_or_desert)
Tunnel: Places this tunnel entrance in a snowy or desert area, or takes it out of there.
Definition: tunnelbridge_map.h:66
GetTunnelBridgeDirection
DiagDirection GetTunnelBridgeDirection(Tile t)
Get the direction pointing to the other end.
Definition: tunnelbridge_map.h:26
HasTunnelBridgeSnowOrDesert
bool HasTunnelBridgeSnowOrDesert(Tile t)
Tunnel: Is this tunnel entrance in a snowy or desert area? Bridge: Does the bridge ramp lie in a snow...
Definition: tunnelbridge_map.h:52
HasTunnelBridgeReservation
bool HasTunnelBridgeReservation(Tile t)
Get the reservation state of the rail tunnel/bridge.
Definition: tunnelbridge_map.h:91
GetTunnelBridgeTransportType
TransportType GetTunnelBridgeTransportType(Tile t)
Tunnel: Get the transport type of the tunnel (road or rail) Bridge: Get the transport type of the bri...
Definition: tunnelbridge_map.h:39
GetTunnelBridgeReservationTrackBits
TrackBits GetTunnelBridgeReservationTrackBits(Tile t)
Get the reserved track bits for a rail tunnel/bridge.
Definition: tunnelbridge_map.h:117
GetOtherTunnelBridgeEnd
TileIndex GetOtherTunnelBridgeEnd(Tile t)
Determines type of the wormhole and returns its other end.
Definition: tunnelbridge_map.h:78
SetTunnelBridgeReservation
void SetTunnelBridgeReservation(Tile t, bool b)
Set the reservation state of the rail tunnel/bridge.
Definition: tunnelbridge_map.h:104