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annotate src/rail_map.h @ 6154:238db87ae59e draft

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(svn r8899) -Fix Remove the unused second parameter from GetTileRailType()
author tron <tron@openttd.org>
date Sun, 25 Feb 2007 11:36:19 +0000
parents c44c070c5032
children b3b8cbc5e854
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
5475
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1 /* $Id$ */
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2
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3 #ifndef RAIL_MAP_H
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4 #define RAIL_MAP_H
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5
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6 #include "direction.h"
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7 #include "rail.h"
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8 #include "tile.h"
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9
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10
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11 typedef enum RailTileType {
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12 RAIL_TILE_NORMAL = 0x0,
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13 RAIL_TILE_SIGNALS = 0x40,
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14 RAIL_TILE_UNUSED = 0x80, /* XXX: Maybe this could become waypoints? */
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15 RAIL_TILE_DEPOT_WAYPOINT = 0xC0, /* Is really depots and waypoints... */
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16 RAIL_TILE_TYPE_MASK = 0xC0
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17 } RailTileType;
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18
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19 static inline RailTileType GetRailTileType(TileIndex t)
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20 {
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21 assert(IsTileType(t, MP_RAILWAY));
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22 return (RailTileType)(_m[t].m5 & RAIL_TILE_TYPE_MASK);
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23 }
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24
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25 /**
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26 * Returns whether this is plain rails, with or without signals. Iow, if this
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27 * tiles RailTileType is RAIL_TILE_NORMAL or RAIL_TILE_SIGNALS.
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28 */
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29 static inline bool IsPlainRailTile(TileIndex tile)
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30 {
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31 RailTileType rtt = GetRailTileType(tile);
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32 return rtt == RAIL_TILE_NORMAL || rtt == RAIL_TILE_SIGNALS;
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33 }
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34
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35 /**
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36 * Checks if a rail tile has signals.
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37 */
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38 static inline bool HasSignals(TileIndex tile)
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39 {
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40 return GetRailTileType(tile) == RAIL_TILE_SIGNALS;
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41 }
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42
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43
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44 /** These specify the subtype when the main rail type is
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45 * RAIL_TILE_DEPOT_WAYPOINT */
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46 typedef enum RailTileSubtypes {
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47 RAIL_SUBTYPE_DEPOT = 0x00,
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48 RAIL_SUBTYPE_WAYPOINT = 0x04,
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49 RAIL_SUBTYPE_MASK = 0x3C
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50 } RailTileSubtype;
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51
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52 /**
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53 * Returns the RailTileSubtype of a given rail tile with type
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54 * RAIL_TILE_DEPOT_WAYPOINT
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55 */
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56 static inline RailTileSubtype GetRailTileSubtype(TileIndex tile)
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57 {
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58 assert(GetRailTileType(tile) == RAIL_TILE_DEPOT_WAYPOINT);
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59 return (RailTileSubtype)(_m[tile].m5 & RAIL_SUBTYPE_MASK);
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60 }
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61
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62
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63 static inline bool IsRailDepot(TileIndex t)
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64 {
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65 return
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66 GetRailTileType(t) == RAIL_TILE_DEPOT_WAYPOINT &&
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67 GetRailTileSubtype(t) == RAIL_SUBTYPE_DEPOT;
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68 }
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69
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70
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71 static inline bool IsRailWaypoint(TileIndex t)
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72 {
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73 return
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74 GetRailTileType(t) == RAIL_TILE_DEPOT_WAYPOINT &&
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75 GetRailTileSubtype(t) == RAIL_SUBTYPE_WAYPOINT;
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76 }
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77
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78
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79 static inline RailType GetRailType(TileIndex t)
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80 {
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81 return (RailType)GB(_m[t].m3, 0, 4);
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82 }
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83
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84 // TODO remove this by moving to the same bits as GetRailType()
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85 static inline RailType GetRailTypeCrossing(TileIndex t)
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86 {
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87 return (RailType)GB(_m[t].m4, 0, 4);
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88 }
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89
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90 static inline void SetRailType(TileIndex t, RailType r)
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91 {
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92 SB(_m[t].m3, 0, 4, r);
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93 }
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94
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95 // TODO remove this by moving to the same bits as SetRailType()
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96 static inline void SetRailTypeCrossing(TileIndex t, RailType r)
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97 {
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98 SB(_m[t].m4, 0, 4, r);
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99 }
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100
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101
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102 static inline TrackBits GetTrackBits(TileIndex tile)
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103 {
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104 return (TrackBits)GB(_m[tile].m5, 0, 6);
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105 }
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106
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107 static inline void SetTrackBits(TileIndex t, TrackBits b)
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108 {
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109 SB(_m[t].m5, 0, 6, b);
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110 }
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111
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112 /**
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113 * Returns whether the given track is present on the given tile. Tile must be
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114 * a plain rail tile (IsPlainRailTile()).
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115 */
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116 static inline bool HasTrack(TileIndex tile, Track track)
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117 {
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118 return HASBIT(GetTrackBits(tile), track);
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119 }
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120
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121
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122 static inline DiagDirection GetRailDepotDirection(TileIndex t)
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123 {
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124 return (DiagDirection)GB(_m[t].m5, 0, 2);
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125 }
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126
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127
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128 static inline Axis GetWaypointAxis(TileIndex t)
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129 {
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130 return (Axis)GB(_m[t].m5, 0, 1);
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131 }
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132
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133 static inline Track GetRailWaypointTrack(TileIndex t)
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134 {
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135 return AxisToTrack(GetWaypointAxis(t));
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136 }
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137
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138 static inline TrackBits GetRailWaypointBits(TileIndex t)
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139 {
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140 return TrackToTrackBits(GetRailWaypointTrack(t));
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141 }
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142
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143
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144 typedef enum SignalType {
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145 SIGTYPE_NORMAL = 0, // normal signal
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146 SIGTYPE_ENTRY = 1, // presignal block entry
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147 SIGTYPE_EXIT = 2, // presignal block exit
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148 SIGTYPE_COMBO = 3 // presignal inter-block
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149 } SignalType;
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150
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151 static inline SignalType GetSignalType(TileIndex t)
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152 {
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153 assert(GetRailTileType(t) == RAIL_TILE_SIGNALS);
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154 return (SignalType)GB(_m[t].m4, 0, 2);
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155 }
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156
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157 static inline void SetSignalType(TileIndex t, SignalType s)
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158 {
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159 assert(GetRailTileType(t) == RAIL_TILE_SIGNALS);
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160 SB(_m[t].m4, 0, 2, s);
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161 }
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162
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163 static inline bool IsPresignalEntry(TileIndex t)
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164 {
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165 return GetSignalType(t) == SIGTYPE_ENTRY || GetSignalType(t) == SIGTYPE_COMBO;
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166 }
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167
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168 static inline bool IsPresignalExit(TileIndex t)
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169 {
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170 return GetSignalType(t) == SIGTYPE_EXIT || GetSignalType(t) == SIGTYPE_COMBO;
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171 }
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172
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173 static inline void CycleSignalSide(TileIndex t, Track track)
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174 {
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175 byte sig;
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176 byte pos = 6;
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177 if (track == TRACK_LOWER || track == TRACK_RIGHT) pos = 4;
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178
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179 sig = GB(_m[t].m3, pos, 2);
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180 if (--sig == 0) sig = 3;
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181 SB(_m[t].m3, pos, 2, sig);
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182 }
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183
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184
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185 typedef enum SignalVariant {
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186 SIG_ELECTRIC = 0,
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187 SIG_SEMAPHORE = 1
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188 } SignalVariant;
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189
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190 static inline SignalVariant GetSignalVariant(TileIndex t)
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191 {
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192 return (SignalVariant)GB(_m[t].m4, 2, 1);
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193 }
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194
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195 static inline void SetSignalVariant(TileIndex t, SignalVariant v)
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196 {
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197 SB(_m[t].m4, 2, 1, v);
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198 }
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199
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200 static inline bool IsSignalPresent(TileIndex t, byte signalbit)
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201 {
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202 return HASBIT(_m[t].m3, signalbit + 4);
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203 }
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204
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205 /** These are states in which a signal can be. Currently these are only two, so
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206 * simple boolean logic will do. But do try to compare to this enum instead of
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207 * normal boolean evaluation, since that will make future additions easier.
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208 */
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209 typedef enum SignalStates {
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210 SIGNAL_STATE_RED = 0,
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211 SIGNAL_STATE_GREEN = 1,
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212 } SignalState;
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213
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214 static inline SignalState GetSingleSignalState(TileIndex t, byte signalbit)
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215 {
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216 return (SignalState)HASBIT(_m[t].m2, signalbit + 4);
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217 }
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218
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219
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220 /**
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221 * Checks for the presence of signals (either way) on the given track on the
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222 * given rail tile.
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223 */
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224 static inline bool HasSignalOnTrack(TileIndex tile, Track track)
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225 {
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226 assert(IsValidTrack(track));
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227 return
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228 GetRailTileType(tile) == RAIL_TILE_SIGNALS &&
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229 (_m[tile].m3 & SignalOnTrack(track)) != 0;
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230 }
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231
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232 /**
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233 * Checks for the presence of signals along the given trackdir on the given
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234 * rail tile.
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235 *
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236 * Along meaning if you are currently driving on the given trackdir, this is
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237 * the signal that is facing us (for which we stop when it's red).
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238 */
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239 static inline bool HasSignalOnTrackdir(TileIndex tile, Trackdir trackdir)
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240 {
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241 assert (IsValidTrackdir(trackdir));
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242 return
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243 GetRailTileType(tile) == RAIL_TILE_SIGNALS &&
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244 _m[tile].m3 & SignalAlongTrackdir(trackdir);
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245 }
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246
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247 /**
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248 * Gets the state of the signal along the given trackdir.
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249 *
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250 * Along meaning if you are currently driving on the given trackdir, this is
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251 * the signal that is facing us (for which we stop when it's red).
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252 */
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253 static inline SignalState GetSignalStateByTrackdir(TileIndex tile, Trackdir trackdir)
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254 {
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255 assert(IsValidTrackdir(trackdir));
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256 assert(HasSignalOnTrack(tile, TrackdirToTrack(trackdir)));
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257 return _m[tile].m2 & SignalAlongTrackdir(trackdir) ?
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258 SIGNAL_STATE_GREEN : SIGNAL_STATE_RED;
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259 }
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260
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261
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262 /**
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263 * Return the rail type of tile, or INVALID_RAILTYPE if this is no rail tile.
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264 */
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265 RailType GetTileRailType(TileIndex tile);
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266
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267
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268 typedef enum RailGroundType {
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269 RAIL_GROUND_BARREN = 0,
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270 RAIL_GROUND_GRASS = 1,
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271 RAIL_GROUND_FENCE_NW = 2,
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272 RAIL_GROUND_FENCE_SE = 3,
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273 RAIL_GROUND_FENCE_SENW = 4,
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274 RAIL_GROUND_FENCE_NE = 5,
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275 RAIL_GROUND_FENCE_SW = 6,
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276 RAIL_GROUND_FENCE_NESW = 7,
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277 RAIL_GROUND_FENCE_VERT1 = 8,
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278 RAIL_GROUND_FENCE_VERT2 = 9,
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279 RAIL_GROUND_FENCE_HORIZ1 = 10,
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280 RAIL_GROUND_FENCE_HORIZ2 = 11,
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281 RAIL_GROUND_ICE_DESERT = 12,
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282 } RailGroundType;
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283
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284 static inline void SetRailGroundType(TileIndex t, RailGroundType rgt)
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285 {
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286 if (GetRailTileType(t) == RAIL_TILE_DEPOT_WAYPOINT) {
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287 SB(_m[t].m4, 0, 4, rgt);
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288 return;
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289 }
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290 SB(_m[t].m2, 0, 4, rgt);
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291 }
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292
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293 static inline RailGroundType GetRailGroundType(TileIndex t)
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294 {
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295 /* TODO Unify this */
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296 if (GetRailTileType(t) == RAIL_TILE_DEPOT_WAYPOINT) return (RailGroundType)GB(_m[t].m4, 0, 4);
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297 return (RailGroundType)GB(_m[t].m2, 0, 4);
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298 }
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299
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300 static inline bool IsSnowRailGround(TileIndex t)
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301 {
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302 return GetRailGroundType(t) == RAIL_GROUND_ICE_DESERT;
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303 }
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304
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305
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306 static inline void MakeRailNormal(TileIndex t, Owner o, TrackBits b, RailType r)
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307 {
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308 SetTileType(t, MP_RAILWAY);
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309 SetTileOwner(t, o);
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310 _m[t].m2 = 0;
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311 _m[t].m3 = r;
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312 _m[t].m4 = 0;
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313 _m[t].m5 = RAIL_TILE_NORMAL | b;
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314 }
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315
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316
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317 static inline void MakeRailDepot(TileIndex t, Owner o, DiagDirection d, RailType r)
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318 {
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319 SetTileType(t, MP_RAILWAY);
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320 SetTileOwner(t, o);
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321 _m[t].m2 = 0;
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322 _m[t].m3 = r;
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323 _m[t].m4 = 0;
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324 _m[t].m5 = RAIL_TILE_DEPOT_WAYPOINT | RAIL_SUBTYPE_DEPOT | d;
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325 }
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326
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327
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328 static inline void MakeRailWaypoint(TileIndex t, Owner o, Axis a, RailType r, uint index)
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329 {
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330 SetTileType(t, MP_RAILWAY);
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331 SetTileOwner(t, o);
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332 _m[t].m2 = index;
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333 _m[t].m3 = r;
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334 _m[t].m4 = 0;
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335 _m[t].m5 = RAIL_TILE_DEPOT_WAYPOINT | RAIL_SUBTYPE_WAYPOINT | a;
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336 }
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337
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338 #endif /* RAIL_MAP_H */