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633 lines
20 KiB
C
633 lines
20 KiB
C
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file tunnelbridge_map.h Functions that have tunnels and bridges in common */
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#ifndef TUNNELBRIDGE_MAP_H
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#define TUNNELBRIDGE_MAP_H
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#include "bridge_map.h"
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#include "tunnel_base.h"
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#include "cmd_helper.h"
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#include "signal_type.h"
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#include "tunnel_map.h"
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#include "track_func.h"
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#include "settings_type.h"
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#include "vehicle_type.h"
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#include "core/bitmath_func.hpp"
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/**
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* Get the direction pointing to the other end.
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*
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* Tunnel: Get the direction facing into the tunnel
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* Bridge: Get the direction pointing onto the bridge
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* @param t The tile to analyze
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* @pre IsTileType(t, MP_TUNNELBRIDGE)
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* @return the above mentioned direction
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*/
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inline DiagDirection GetTunnelBridgeDirection(TileIndex t)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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return (DiagDirection)GB(_m[t].m5, 0, 2);
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}
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/**
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* Tunnel: Get the transport type of the tunnel (road or rail)
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* Bridge: Get the transport type of the bridge's ramp
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* @param t The tile to analyze
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* @pre IsTileType(t, MP_TUNNELBRIDGE)
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* @return the transport type in the tunnel/bridge
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*/
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inline TransportType GetTunnelBridgeTransportType(TileIndex t)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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return (TransportType)GB(_m[t].m5, 2, 2);
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}
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inline uint8_t GetTunnelBridgeGroundBits(TileIndex t)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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return GB(_me[t].m7, 5, 3);
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}
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/**
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* Tunnel: Is this tunnel entrance in a snowy or desert area?
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* Bridge: Does the bridge ramp lie in a snow or desert area?
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* @param t The tile to analyze
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* @pre IsTileType(t, MP_TUNNELBRIDGE)
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* @return true if and only if the tile is in a snowy/desert area
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*/
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inline bool HasTunnelBridgeSnowOrDesert(TileIndex t)
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{
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return GetTunnelBridgeGroundBits(t) == 1;
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}
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/**
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* Is this a rail bridge or tunnel?
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* @param t the tile that might be a rail bridge or tunnel
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* @return true if and only if this tile is a rail bridge or tunnel
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*/
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inline bool IsRailTunnelBridgeTile(TileIndex t)
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{
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return IsTileType(t, MP_TUNNELBRIDGE) && (Extract<TransportType, 2, 2>(_m[t].m5) == TRANSPORT_RAIL);
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}
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inline void SetTunnelBridgeGroundBits(TileIndex t, uint8_t bits)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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SB(_me[t].m7, 5, 3, bits);
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}
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/**
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* Tunnel: Places this tunnel entrance in a snowy or desert area, or takes it out of there.
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* Bridge: Sets whether the bridge ramp lies in a snow or desert area.
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* @param t the tunnel entrance / bridge ramp tile
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* @param snow_or_desert is the entrance/ramp in snow or desert (true), when
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* not in snow and not in desert false
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* @pre IsTileType(t, MP_TUNNELBRIDGE)
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*/
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inline void SetTunnelBridgeSnowOrDesert(TileIndex t, bool snow_or_desert)
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{
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SetTunnelBridgeGroundBits(t, snow_or_desert ? 1 : 0);
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}
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/**
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* Determines type of the wormhole and returns its other end
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* @param t one end
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* @pre IsTileType(t, MP_TUNNELBRIDGE)
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* @return other end
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*/
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inline TileIndex GetOtherTunnelBridgeEnd(TileIndex t)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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return IsTunnel(t) ? GetOtherTunnelEnd(t) : GetOtherBridgeEnd(t);
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}
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/**
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* Get the track bits for a rail tunnel/bridge
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* @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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* @param t the tile
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* @return reserved track bits
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*/
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inline TrackBits GetTunnelBridgeTrackBits(TileIndex t)
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{
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if (IsTunnel(t)) {
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return DiagDirToDiagTrackBits(GetTunnelBridgeDirection(t));
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} else {
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return GetCustomBridgeHeadTrackBits(t);
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}
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}
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/**
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* Get the primary railtype track bits for a rail tunnel/bridge
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* @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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* @param t the tile
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* @return reserved track bits
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*/
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inline TrackBits GetPrimaryTunnelBridgeTrackBits(TileIndex t)
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{
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if (IsTunnel(t)) {
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return DiagDirToDiagTrackBits(GetTunnelBridgeDirection(t));
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} else {
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TrackBits bits = GetCustomBridgeHeadTrackBits(t);
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if (bits == TRACK_BIT_HORZ || bits == TRACK_BIT_VERT) {
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return bits & GetAcrossBridgePossibleTrackBits(t);
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} else {
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return bits;
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}
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}
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}
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/**
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* Get the secondary railtype track bits for a rail tunnel/bridge
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* @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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* @param t the tile
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* @return reserved track bits
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*/
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inline TrackBits GetSecondaryTunnelBridgeTrackBits(TileIndex t)
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{
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if (IsTunnel(t)) {
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return TRACK_BIT_NONE;
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} else {
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TrackBits bits = GetCustomBridgeHeadTrackBits(t);
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if (bits == TRACK_BIT_HORZ || bits == TRACK_BIT_VERT) {
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return bits & (~GetAcrossBridgePossibleTrackBits(t));
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} else {
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return TRACK_BIT_NONE;
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}
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}
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}
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/**
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* Get the track bits for a rail tunnel/bridge onto/across the tunnel/bridge
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* @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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* @param t the tile
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* @return reserved track bits
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*/
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inline TrackBits GetAcrossTunnelBridgeTrackBits(TileIndex t)
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{
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if (IsTunnel(t)) {
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return DiagDirToDiagTrackBits(GetTunnelBridgeDirection(t));
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} else {
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return GetCustomBridgeHeadTrackBits(t) & GetAcrossBridgePossibleTrackBits(t);
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}
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}
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/**
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* Get the reserved track bits for a rail tunnel/bridge
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* @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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* @param t the tile
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* @return reserved track bits
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*/
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inline TrackBits GetTunnelBridgeReservationTrackBits(TileIndex t)
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{
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if (IsTunnel(t)) {
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return HasTunnelReservation(t) ? DiagDirToDiagTrackBits(GetTunnelBridgeDirection(t)) : TRACK_BIT_NONE;
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} else {
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return GetBridgeReservationTrackBits(t);
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}
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}
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/**
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* Get the reserved track bits for a rail tunnel/bridge onto/across the tunnel/bridge
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* @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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* @param t the tile
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* @return reserved track bits
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*/
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inline TrackBits GetAcrossTunnelBridgeReservationTrackBits(TileIndex t)
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{
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if (IsTunnel(t)) {
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return HasTunnelReservation(t) ? DiagDirToDiagTrackBits(GetTunnelBridgeDirection(t)) : TRACK_BIT_NONE;
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} else {
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return GetAcrossBridgeReservationTrackBits(t);
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}
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}
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/**
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* Get whether there are reserved track bits for a rail tunnel/bridge onto/across the tunnel/bridge
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* @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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* @param t the tile
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* @return whether there are reserved track bits
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*/
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inline bool HasAcrossTunnelBridgeReservation(TileIndex t)
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{
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if (IsTunnel(t)) {
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return HasTunnelReservation(t);
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} else {
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return GetAcrossBridgeReservationTrackBits(t) != TRACK_BIT_NONE;
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}
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}
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/**
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* Get the rail infrastructure count of a rail tunnel/bridge head tile (excluding the tunnel/bridge middle)
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* @param bits the track bits
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* @return rail infrastructure count
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*/
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inline uint GetTunnelBridgeHeadOnlyRailInfrastructureCountFromTrackBits(TrackBits bits)
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{
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uint pieces = CountBits(bits);
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if (TracksOverlap(bits)) pieces *= pieces;
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return (TUNNELBRIDGE_TRACKBIT_FACTOR / 2) * (1 + pieces);
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}
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/**
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* Get the primary railtype rail infrastructure count of a rail tunnel/bridge head tile (excluding the tunnel/bridge middle)
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* @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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* @param t the tile
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* @return rail infrastructure count
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*/
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inline uint GetTunnelBridgeHeadOnlyPrimaryRailInfrastructureCount(TileIndex t)
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{
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return IsBridge(t) ? GetTunnelBridgeHeadOnlyRailInfrastructureCountFromTrackBits(GetPrimaryTunnelBridgeTrackBits(t)) : TUNNELBRIDGE_TRACKBIT_FACTOR;
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}
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/**
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* Get the secondary railtype rail infrastructure count of a rail tunnel/bridge head tile (excluding the tunnel/bridge middle)
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* @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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* @param t the tile
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* @return rail infrastructure count
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*/
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inline uint GetTunnelBridgeHeadOnlySecondaryRailInfrastructureCount(TileIndex t)
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{
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return IsBridge(t) && GetSecondaryTunnelBridgeTrackBits(t) ? (TUNNELBRIDGE_TRACKBIT_FACTOR / 2) : 0;
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}
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/**
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* Check if the given track direction on a rail bridge head tile enters the bridge
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* @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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* @param t the tile
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* @param td track direction
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* @return reservation state
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*/
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inline bool TrackdirEntersTunnelBridge(TileIndex t, Trackdir td)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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assert_tile(GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL, t);
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return TrackdirToExitdir(td) == GetTunnelBridgeDirection(t);
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}
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/**
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* Check if the given track direction on a rail bridge head tile exits the bridge
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* @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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* @param t the tile
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* @param td track direction
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* @return reservation state
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*/
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inline bool TrackdirExitsTunnelBridge(TileIndex t, Trackdir td)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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assert_tile(GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL, t);
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return TrackdirToExitdir(ReverseTrackdir(td)) == GetTunnelBridgeDirection(t);
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}
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/**
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* Check if the given track on a rail bridge head tile enters/exits the bridge
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* @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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* @param tile the tile
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* @param t track
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* @return reservation state
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*/
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inline bool IsTrackAcrossTunnelBridge(TileIndex tile, Track t)
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{
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assert_tile(IsTileType(tile, MP_TUNNELBRIDGE), tile);
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assert_tile(GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL, tile);
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return DiagdirReachesTracks(ReverseDiagDir(GetTunnelBridgeDirection(tile))) & TrackToTrackBits(t);
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}
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/**
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* Lift the reservation of a specific track on a tunnel or rail bridge head tile
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* @pre IsTileType(tile, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL
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* @param tile the tile
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*/
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inline void UnreserveAcrossRailTunnelBridge(TileIndex tile)
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{
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assert_tile(IsTileType(tile, MP_TUNNELBRIDGE), tile);
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assert_tile(GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL, tile);
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if (IsTunnel(tile)) {
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SetTunnelReservation(tile, false);
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} else {
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UnreserveAcrossRailBridgeHead(tile);
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}
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}
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/**
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* Declare tunnel/bridge entrance with signal simulation.
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* @param t the tunnel/bridge tile.
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*/
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inline void SetTunnelBridgeSignalSimulationEntrance(TileIndex t)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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SetBit(_m[t].m5, 5);
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}
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/**
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* Remove tunnel/bridge entrance with signal simulation.
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* @param t the tunnel/bridge tile.
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*/
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inline void ClrTunnelBridgeSignalSimulationEntrance(TileIndex t)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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ClrBit(_m[t].m5, 5);
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}
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/**
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* Declare tunnel/bridge exit with signal simulation.
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* @param t the tunnel/bridge tile.
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*/
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inline void SetTunnelBridgeSignalSimulationExit(TileIndex t)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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SetBit(_m[t].m5, 6);
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}
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/**
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* Remove tunnel/bridge exit with signal simulation.
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* @param t the tunnel/bridge tile.
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*/
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inline void ClrTunnelBridgeSignalSimulationExit(TileIndex t)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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ClrBit(_m[t].m5, 6);
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}
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/**
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* Is this a tunnel/bridge pair with signal simulation?
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* On tunnel/bridge pair minimal one of the two bits is set.
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* @param t the tile that might be a tunnel/bridge.
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* @return true if and only if this tile is a tunnel/bridge with signal simulation.
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*/
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inline bool IsTunnelBridgeWithSignalSimulation(TileIndex t)
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{
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return IsTileType(t, MP_TUNNELBRIDGE) && (HasBit(_m[t].m5, 5) || HasBit(_m[t].m5, 6));
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}
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/**
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* Is this a tunnel/bridge entrance tile with signal?
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* Tunnel bridge signal simulation has allways bit 5 on at entrance.
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* @param t the tile that might be a tunnel/bridge.
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* @pre IsTileType(t, MP_TUNNELBRIDGE)
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* @return true if and only if this tile is a tunnel/bridge entrance.
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*/
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inline bool IsTunnelBridgeSignalSimulationEntrance(TileIndex t)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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return HasBit(_m[t].m5, 5);
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}
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/**
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* Is this a tunnel/bridge entrance tile with signal?
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* Tunnel bridge signal simulation has allways bit 5 on at entrance.
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* @param t the tile that might be a tunnel/bridge.
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* @return true if and only if this tile is a tunnel/bridge entrance.
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*/
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inline bool IsTunnelBridgeSignalSimulationEntranceTile(TileIndex t)
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{
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return IsTileType(t, MP_TUNNELBRIDGE) && HasBit(_m[t].m5, 5);
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}
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/**
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* Is this a tunnel/bridge entrance tile with signal only?
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* @param t the tile that might be a tunnel/bridge.
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* @pre IsTileType(t, MP_TUNNELBRIDGE)
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* @return true if and only if this tile is a tunnel/bridge entrance only.
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*/
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inline bool IsTunnelBridgeSignalSimulationEntranceOnly(TileIndex t)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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return HasBit(_m[t].m5, 5) && !HasBit(_m[t].m5, 6);
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}
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/**
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* Is this a tunnel/bridge exit?
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* @param t the tile that might be a tunnel/bridge.
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* @pre IsTileType(t, MP_TUNNELBRIDGE)
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* @return true if and only if this tile is a tunnel/bridge exit.
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*/
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inline bool IsTunnelBridgeSignalSimulationExit(TileIndex t)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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return HasBit(_m[t].m5, 6);
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}
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/**
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* Is this a tunnel/bridge exit?
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* @param t the tile that might be a tunnel/bridge.
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* @return true if and only if this tile is a tunnel/bridge exit.
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*/
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inline bool IsTunnelBridgeSignalSimulationExitTile(TileIndex t)
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{
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return IsTileType(t, MP_TUNNELBRIDGE) && HasBit(_m[t].m5, 6);
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}
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/**
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* Is this a tunnel/bridge exit only?
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* @param t the tile that might be a tunnel/bridge.
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* @pre IsTileType(t, MP_TUNNELBRIDGE)
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* @return true if and only if this tile is a tunnel/bridge exit only.
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*/
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inline bool IsTunnelBridgeSignalSimulationExitOnly(TileIndex t)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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return !HasBit(_m[t].m5, 5) && HasBit(_m[t].m5, 6);
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}
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/**
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* Is this a tunnel/bridge entrance and exit?
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* @param t the tile that might be a tunnel/bridge.
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* @pre IsTileType(t, MP_TUNNELBRIDGE)
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* @return true if and only if this tile is a tunnel/bridge entrance and exit.
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*/
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inline bool IsTunnelBridgeSignalSimulationBidirectional(TileIndex t)
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{
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assert_tile(IsTileType(t, MP_TUNNELBRIDGE), t);
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return HasBit(_m[t].m5, 5) && HasBit(_m[t].m5, 6);
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}
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/**
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* Get the signal state for a tunnel/bridge entrance with signal simulation
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* @param t the tunnel/bridge entrance or exit tile with signal simulation
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* @pre IsTunnelBridgeWithSignalSimulation(t)
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* @return signal state
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*/
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inline SignalState GetTunnelBridgeEntranceSignalState(TileIndex t)
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{
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assert_tile(IsTunnelBridgeSignalSimulationEntrance(t), t);
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return HasBit(_me[t].m6, 0) ? SIGNAL_STATE_GREEN : SIGNAL_STATE_RED;
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}
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/**
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* Get the signal state for a tunnel/bridge exit with signal simulation
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* @param t the tunnel/bridge entrance or exit tile with signal simulation
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* @pre IsTunnelBridgeWithSignalSimulation(t)
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* @return signal state
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*/
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inline SignalState GetTunnelBridgeExitSignalState(TileIndex t)
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{
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assert_tile(IsTunnelBridgeSignalSimulationExit(t), t);
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return HasBit(_me[t].m6, 7) ? SIGNAL_STATE_GREEN : SIGNAL_STATE_RED;
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}
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/**
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* Set the signal state for a tunnel/bridge entrance or exit with signal simulation
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* @param t the tunnel/bridge entrance or exit tile with signal simulation
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* @pre IsTunnelBridgeWithSignalSimulation(t)
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* @param state signal state
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*/
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inline void SetTunnelBridgeEntranceSignalState(TileIndex t, SignalState state)
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{
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assert_tile(IsTunnelBridgeSignalSimulationEntrance(t), t);
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SB(_me[t].m6, 0, 1, (state == SIGNAL_STATE_GREEN) ? 1 : 0);
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}
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/**
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* Set the signal state for a tunnel/bridge entrance or exit with signal simulation
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* @param t the tunnel/bridge entrance or exit tile with signal simulation
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* @pre IsTunnelBridgeWithSignalSimulation(t)
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* @param state signal state
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*/
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inline void SetTunnelBridgeExitSignalState(TileIndex t, SignalState state)
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{
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assert_tile(IsTunnelBridgeSignalSimulationExit(t), t);
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SB(_me[t].m6, 7, 1, (state == SIGNAL_STATE_GREEN) ? 1 : 0);
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}
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inline bool IsTunnelBridgeSemaphore(TileIndex t)
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{
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assert_tile(IsTunnelBridgeWithSignalSimulation(t), t);
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return HasBit(_me[t].m6, 1);
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}
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inline void SetTunnelBridgeSemaphore(TileIndex t, bool is_semaphore)
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{
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assert_tile(IsTunnelBridgeWithSignalSimulation(t), t);
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SB(_me[t].m6, 1, 1, is_semaphore ? 1 : 0);
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}
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inline bool IsTunnelBridgePBS(TileIndex t)
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{
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assert_tile(IsTunnelBridgeWithSignalSimulation(t), t);
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return HasBit(_me[t].m6, 6);
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}
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inline bool IsTunnelBridgeEffectivelyPBS(TileIndex t)
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{
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return _settings_game.vehicle.train_braking_model == TBM_REALISTIC || IsTunnelBridgePBS(t);
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}
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inline void SetTunnelBridgePBS(TileIndex t, bool is_pbs)
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{
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assert_tile(IsTunnelBridgeWithSignalSimulation(t), t);
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SB(_me[t].m6, 6, 1, is_pbs ? 1 : 0);
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}
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inline uint8_t GetTunnelBridgeEntranceSignalAspect(TileIndex t)
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{
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assert_tile(IsTunnelBridgeWithSignalSimulation(t), t);
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return GB(_m[t].m3, 0, 3);
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}
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inline void SetTunnelBridgeEntranceSignalAspect(TileIndex t, uint8_t aspect)
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{
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assert_tile(IsTunnelBridgeWithSignalSimulation(t), t);
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SB(_m[t].m3, 0, 3, aspect);
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}
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inline uint8_t GetTunnelBridgeExitSignalAspect(TileIndex t)
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{
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assert_tile(IsTunnelBridgeWithSignalSimulation(t), t);
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return GB(_m[t].m3, 3, 3);
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}
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inline void SetTunnelBridgeExitSignalAspect(TileIndex t, uint8_t aspect)
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{
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assert_tile(IsTunnelBridgeWithSignalSimulation(t), t);
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SB(_m[t].m3, 3, 3, aspect);
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}
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inline uint GetTunnelBridgeSignalSimulationSpacing(TileIndex t)
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{
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assert_tile(IsRailTunnelBridgeTile(t), t);
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return 1 + GB(_me[t].m8, 12, 4);
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}
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inline void SetTunnelBridgeSignalSimulationSpacing(TileIndex t, uint spacing)
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{
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assert_tile(IsRailTunnelBridgeTile(t), t);
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SB(_me[t].m8, 12, 4, spacing - 1);
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}
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/**
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* Does tunnel/bridge signal tile have "one or more trace restrict mappings present" bit set
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* @param tile the tile to check
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*/
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inline bool IsTunnelBridgeRestrictedSignal(TileIndex tile)
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{
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assert_tile(IsTunnelBridgeWithSignalSimulation(tile), tile);
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return (bool) GB(_m[tile].m3, 6, 1);
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}
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/**
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* Set tunnel/bridge signal tile "one or more trace restrict mappings present" bit
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* @param tile the tile to set
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*/
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inline void SetTunnelBridgeRestrictedSignal(TileIndex tile, bool is_restricted)
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{
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assert_tile(IsTunnelBridgeWithSignalSimulation(tile), tile);
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SB(_m[tile].m3, 6, 1, is_restricted);
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}
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inline Trackdir GetTunnelBridgeExitTrackdir(TileIndex t, DiagDirection tunnel_bridge_dir)
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{
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return TrackEnterdirToTrackdir((Track)FindFirstBit(GetAcrossTunnelBridgeTrackBits(t)), ReverseDiagDir(tunnel_bridge_dir));
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}
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inline Trackdir GetTunnelBridgeExitTrackdir(TileIndex t)
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{
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return GetTunnelBridgeExitTrackdir(t, GetTunnelBridgeDirection(t));
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}
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inline Trackdir GetTunnelBridgeEntranceTrackdir(TileIndex t, DiagDirection tunnel_bridge_dir)
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{
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return TrackExitdirToTrackdir((Track)FindFirstBit(GetAcrossTunnelBridgeTrackBits(t)), tunnel_bridge_dir);
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}
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inline Trackdir GetTunnelBridgeEntranceTrackdir(TileIndex t)
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{
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return GetTunnelBridgeEntranceTrackdir(t, GetTunnelBridgeDirection(t));
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}
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inline void SetTunnelBridgeSignalStyle(TileIndex t, TileIndex end, uint8_t style)
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{
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if (style == 0 && !HasBit(_m[t].m3, 7)) return;
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extern void SetTunnelBridgeSignalStyleExtended(TileIndex t, TileIndex end, uint8_t style);
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SetTunnelBridgeSignalStyleExtended(t, end, style);
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}
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inline uint8_t GetTunnelBridgeSignalStyle(TileIndex t)
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{
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if (likely(!HasBit(_m[t].m3, 7))) return 0;
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if (IsTunnel(t)) {
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extern uint8_t GetTunnelSignalStyleExtended(TileIndex t);
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return GetTunnelSignalStyleExtended(t);
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} else {
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extern uint8_t GetBridgeSignalStyleExtended(TileIndex t);
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return GetBridgeSignalStyleExtended(t);
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}
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}
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void AddRailTunnelBridgeInfrastructure(Company *c, TileIndex begin, TileIndex end);
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void SubtractRailTunnelBridgeInfrastructure(Company *c, TileIndex begin, TileIndex end);
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void AddRailTunnelBridgeInfrastructure(TileIndex begin, TileIndex end);
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void SubtractRailTunnelBridgeInfrastructure(TileIndex begin, TileIndex end);
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void AddRoadTunnelBridgeInfrastructure(TileIndex begin, TileIndex end);
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void SubtractRoadTunnelBridgeInfrastructure(TileIndex begin, TileIndex end);
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#endif /* TUNNELBRIDGE_MAP_H */
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