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annotate src/rail_map.h @ 8954:454ba10a0cff draft

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(svn r12745) -Codechange: a bit of naming conventions, introduce Is*DepotTile()
author smatz <smatz@openttd.org>
date Thu, 17 Apr 2008 00:44:20 +0000
parents 8207d9e330cc
children c8a0fa0e208a
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1 /* $Id$ */
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2
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3 /** @file rail_map.h Hides the direct accesses to the map array with map accessors */
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4
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5 #ifndef RAIL_MAP_H
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6 #define RAIL_MAP_H
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7
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8 #include "rail_type.h"
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9 #include "signal_func.h"
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10 #include "direction_func.h"
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11 #include "track_func.h"
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12 #include "tile_map.h"
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13 #include "signal_type.h"
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14 #include "waypoint_type.h"
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17 /** Different types of Rail-related tiles */
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18 enum RailTileType {
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19 RAIL_TILE_NORMAL = 0, ///< Normal rail tile without signals
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20 RAIL_TILE_SIGNALS = 1, ///< Normal rail tile with signals
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21 RAIL_TILE_WAYPOINT = 2, ///< Waypoint (X or Y direction)
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22 RAIL_TILE_DEPOT = 3, ///< Depot (one entrance)
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23 };
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25 /**
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26 * Returns the RailTileType (normal with or without signals,
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27 * waypoint or depot).
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28 * @param t the tile to get the information from
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29 * @pre IsTileType(t, MP_RAILWAY)
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30 * @return the RailTileType
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31 */
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32 static inline RailTileType GetRailTileType(TileIndex t)
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33 {
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34 assert(IsTileType(t, MP_RAILWAY));
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35 return (RailTileType)GB(_m[t].m5, 6, 2);
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36 }
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37
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38 /**
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39 * Returns whether this is plain rails, with or without signals. Iow, if this
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40 * tiles RailTileType is RAIL_TILE_NORMAL or RAIL_TILE_SIGNALS.
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41 * @param t the tile to get the information from
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42 * @pre IsTileType(t, MP_RAILWAY)
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43 * @return true if and only if the tile is normal rail (with or without signals)
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44 */
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45 static inline bool IsPlainRailTile(TileIndex t)
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46 {
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47 RailTileType rtt = GetRailTileType(t);
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48 return rtt == RAIL_TILE_NORMAL || rtt == RAIL_TILE_SIGNALS;
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49 }
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50
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51 /**
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52 * Checks if a rail tile has signals.
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53 * @param t the tile to get the information from
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54 * @pre IsTileType(t, MP_RAILWAY)
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55 * @return true if and only if the tile has signals
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56 */
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57 static inline bool HasSignals(TileIndex t)
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58 {
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59 return GetRailTileType(t) == RAIL_TILE_SIGNALS;
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60 }
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61
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62 /**
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63 * Add/remove the 'has signal' bit from the RailTileType
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64 * @param tile the tile to add/remove the signals to/from
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65 * @param signals whether the rail tile should have signals or not
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66 * @pre IsPlainRailTile(tile)
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67 */
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68 static inline void SetHasSignals(TileIndex tile, bool signals)
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69 {
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70 assert(IsPlainRailTile(tile));
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71 SB(_m[tile].m5, 6, 1, signals);
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72 }
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73
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74 /**
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75 * Is this rail tile a rail waypoint?
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76 * @param t the tile to get the information from
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77 * @pre IsTileType(t, MP_RAILWAY)
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78 * @return true if and only if the tile is a rail waypoint
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79 */
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80 static inline bool IsRailWaypoint(TileIndex t)
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81 {
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82 return GetRailTileType(t) == RAIL_TILE_WAYPOINT;
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83 }
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84
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85 /**
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86 * Is this rail tile a rail depot?
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87 * @param t the tile to get the information from
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88 * @pre IsTileType(t, MP_RAILWAY)
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89 * @return true if and only if the tile is a rail depot
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90 */
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91 static inline bool IsRailDepot(TileIndex t)
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92 {
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93 return GetRailTileType(t) == RAIL_TILE_DEPOT;
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94 }
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95
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96 /**
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97 * Is this tile rail tile and a rail depot?
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98 * @param t the tile to get the information from
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99 * @pre IsTileType(t, MP_RAILWAY)
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100 * @return true if and only if the tile is a rail depot
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101 */
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102 static inline bool IsRailDepotTile(TileIndex t)
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103 {
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104 return IsTileType(t, MP_RAILWAY) && IsRailDepot(t);
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105 }
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106
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107 /**
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108 * Gets the rail type of the given tile
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109 * @param t the tile to get the rail type from
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110 * @return the rail type of the tile
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111 */
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112 static inline RailType GetRailType(TileIndex t)
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113 {
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114 return (RailType)GB(_m[t].m3, 0, 4);
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115 }
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116
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117 /**
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118 * Sets the rail type of the given tile
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119 * @param t the tile to set the rail type of
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120 * @param r the new rail type for the tile
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121 */
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122 static inline void SetRailType(TileIndex t, RailType r)
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123 {
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124 SB(_m[t].m3, 0, 4, r);
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125 }
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126
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127
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128 /**
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129 * Gets the track bits of the given tile
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130 * @param t the tile to get the track bits from
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131 * @return the track bits of the tile
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132 */
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133 static inline TrackBits GetTrackBits(TileIndex tile)
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134 {
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135 return (TrackBits)GB(_m[tile].m5, 0, 6);
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136 }
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137
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138 /**
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139 * Sets the track bits of the given tile
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140 * @param t the tile to set the track bits of
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141 * @param b the new track bits for the tile
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142 */
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143 static inline void SetTrackBits(TileIndex t, TrackBits b)
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144 {
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145 SB(_m[t].m5, 0, 6, b);
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146 }
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147
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148 /**
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149 * Returns whether the given track is present on the given tile.
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150 * @param tile the tile to check the track presence of
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151 * @param track the track to search for on the tile
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152 * @pre IsPlainRailTile(tile)
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153 * @return true if and only if the given track exists on the tile
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154 */
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155 static inline bool HasTrack(TileIndex tile, Track track)
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156 {
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157 return HasBit(GetTrackBits(tile), track);
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158 }
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159
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160 /**
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161 * Returns the direction the depot is facing to
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162 * @param t the tile to get the depot facing from
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163 * @pre IsRailDepotTile(t)
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164 * @return the direction the depot is facing
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165 */
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166 static inline DiagDirection GetRailDepotDirection(TileIndex t)
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167 {
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168 return (DiagDirection)GB(_m[t].m5, 0, 2);
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169 }
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170
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171
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172 /**
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173 * Returns the axis of the waypoint
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174 * @param t the tile to get the waypoint axis from
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175 * @pre IsRailWaypointTile(t)
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176 * @return the axis of the waypoint
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177 */
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178 static inline Axis GetWaypointAxis(TileIndex t)
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179 {
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180 return (Axis)GB(_m[t].m5, 0, 1);
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181 }
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182
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183 /**
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184 * Returns the track of the waypoint
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185 * @param t the tile to get the waypoint track from
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186 * @pre IsRailWaypointTile(t)
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187 * @return the track of the waypoint
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188 */
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189 static inline Track GetRailWaypointTrack(TileIndex t)
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190 {
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191 return AxisToTrack(GetWaypointAxis(t));
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192 }
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193
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194 /**
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195 * Returns the track bits of the waypoint
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196 * @param t the tile to get the waypoint track bits from
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197 * @pre IsRailWaypointTile(t)
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198 * @return the track bits of the waypoint
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199 */
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200 static inline TrackBits GetRailWaypointBits(TileIndex t)
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201 {
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202 return TrackToTrackBits(GetRailWaypointTrack(t));
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203 }
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204
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205 /**
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206 * Returns waypoint index (for the waypoint pool)
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207 * @param t the tile to get the waypoint index from
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208 * @pre IsRailWaypointTile(t)
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209 * @return the waypoint index
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210 */
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211 static inline WaypointID GetWaypointIndex(TileIndex t)
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212 {
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213 return (WaypointID)_m[t].m2;
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214 }
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215
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216 static inline SignalType GetSignalType(TileIndex t, Track track)
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217 {
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218 assert(GetRailTileType(t) == RAIL_TILE_SIGNALS);
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219 byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 4 : 0;
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220 return (SignalType)GB(_m[t].m2, pos, 2);
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221 }
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222
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223 static inline void SetSignalType(TileIndex t, Track track, SignalType s)
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224 {
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225 assert(GetRailTileType(t) == RAIL_TILE_SIGNALS);
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226 byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 4 : 0;
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227 SB(_m[t].m2, pos, 2, s);
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228 if (track == INVALID_TRACK) SB(_m[t].m2, 4, 2, s);
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229 }
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230
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231 static inline bool IsPresignalEntry(TileIndex t, Track track)
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232 {
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233 return GetSignalType(t, track) == SIGTYPE_ENTRY || GetSignalType(t, track) == SIGTYPE_COMBO;
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234 }
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235
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236 static inline bool IsPresignalExit(TileIndex t, Track track)
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237 {
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238 return GetSignalType(t, track) == SIGTYPE_EXIT || GetSignalType(t, track) == SIGTYPE_COMBO;
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239 }
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240
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241 static inline void CycleSignalSide(TileIndex t, Track track)
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242 {
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243 byte sig;
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244 byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 4 : 6;
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245
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246 sig = GB(_m[t].m3, pos, 2);
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247 if (--sig == 0) sig = 3;
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248 SB(_m[t].m3, pos, 2, sig);
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249 }
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250
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251 static inline SignalVariant GetSignalVariant(TileIndex t, Track track)
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252 {
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253 byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 6 : 2;
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254 return (SignalVariant)GB(_m[t].m2, pos, 1);
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255 }
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256
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257 static inline void SetSignalVariant(TileIndex t, Track track, SignalVariant v)
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258 {
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259 byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 6 : 2;
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260 SB(_m[t].m2, pos, 1, v);
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261 if (track == INVALID_TRACK) SB(_m[t].m2, 6, 1, v);
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262 }
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263
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264 /** These are states in which a signal can be. Currently these are only two, so
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265 * simple boolean logic will do. But do try to compare to this enum instead of
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266 * normal boolean evaluation, since that will make future additions easier.
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267 */
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268 enum SignalState {
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269 SIGNAL_STATE_RED = 0, ///< The signal is red
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270 SIGNAL_STATE_GREEN = 1, ///< The signal is green
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271 };
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272
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273 /**
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274 * Set the states of the signals (Along/AgainstTrackDir)
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275 * @param tile the tile to set the states for
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276 * @param state the new state
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277 */
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278 static inline void SetSignalStates(TileIndex tile, uint state)
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279 {
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280 SB(_m[tile].m4, 4, 4, state);
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281 }
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282
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283 /**
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284 * Set the states of the signals (Along/AgainstTrackDir)
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285 * @param tile the tile to set the states for
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286 * @param state the new state
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287 */
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288 static inline uint GetSignalStates(TileIndex tile)
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289 {
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290 return GB(_m[tile].m4, 4, 4);
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291 }
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292
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293 /**
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294 * Get the state of a single signal
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295 * @param t the tile to get the signal state for
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296 * @param signalbit the signal
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297 * @return the state of the signal
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298 */
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299 static inline SignalState GetSingleSignalState(TileIndex t, byte signalbit)
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300 {
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301 return (SignalState)HasBit(GetSignalStates(t), signalbit);
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302 }
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303
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304 /**
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305 * Set whether the given signals are present (Along/AgainstTrackDir)
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306 * @param tile the tile to set the present signals for
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307 * @param signals the signals that have to be present
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308 */
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309 static inline void SetPresentSignals(TileIndex tile, uint signals)
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310 {
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311 SB(_m[tile].m3, 4, 4, signals);
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312 }
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313
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314 /**
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315 * Get whether the given signals are present (Along/AgainstTrackDir)
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316 * @param tile the tile to get the present signals for
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317 * @return the signals that are present
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318 */
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319 static inline uint GetPresentSignals(TileIndex tile)
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320 {
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321 return GB(_m[tile].m3, 4, 4);
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322 }
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323
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324 /**
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325 * Checks whether the given signals is present
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326 * @param t the tile to check on
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327 * @param signalbit the signal
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328 * @return true if and only if the signal is present
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329 */
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330 static inline bool IsSignalPresent(TileIndex t, byte signalbit)
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331 {
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332 return HasBit(GetPresentSignals(t), signalbit);
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333 }
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334
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335 /**
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336 * Checks for the presence of signals (either way) on the given track on the
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337 * given rail tile.
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338 */
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339 static inline bool HasSignalOnTrack(TileIndex tile, Track track)
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340 {
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341 assert(IsValidTrack(track));
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342 return
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343 GetRailTileType(tile) == RAIL_TILE_SIGNALS &&
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344 (GetPresentSignals(tile) & SignalOnTrack(track)) != 0;
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345 }
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346
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347 /**
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348 * Checks for the presence of signals along the given trackdir on the given
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349 * rail tile.
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350 *
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351 * Along meaning if you are currently driving on the given trackdir, this is
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352 * the signal that is facing us (for which we stop when it's red).
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353 */
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354 static inline bool HasSignalOnTrackdir(TileIndex tile, Trackdir trackdir)
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355 {
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356 assert (IsValidTrackdir(trackdir));
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357 return
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358 GetRailTileType(tile) == RAIL_TILE_SIGNALS &&
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359 GetPresentSignals(tile) & SignalAlongTrackdir(trackdir);
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360 }
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361
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362 /**
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363 * Gets the state of the signal along the given trackdir.
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364 *
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365 * Along meaning if you are currently driving on the given trackdir, this is
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366 * the signal that is facing us (for which we stop when it's red).
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367 */
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368 static inline SignalState GetSignalStateByTrackdir(TileIndex tile, Trackdir trackdir)
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369 {
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370 assert(IsValidTrackdir(trackdir));
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371 assert(HasSignalOnTrack(tile, TrackdirToTrack(trackdir)));
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372 return GetSignalStates(tile) & SignalAlongTrackdir(trackdir) ?
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373 SIGNAL_STATE_GREEN : SIGNAL_STATE_RED;
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374 }
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375
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376 /**
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377 * Sets the state of the signal along the given trackdir.
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378 */
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379 static inline void SetSignalStateByTrackdir(TileIndex tile, Trackdir trackdir, SignalState state)
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380 {
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381 if (state == SIGNAL_STATE_GREEN) { // set 1
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382 SetSignalStates(tile, GetSignalStates(tile) | SignalAlongTrackdir(trackdir));
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383 } else {
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384 SetSignalStates(tile, GetSignalStates(tile) & ~SignalAlongTrackdir(trackdir));
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385 }
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386 }
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387
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388
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389 /**
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390 * Return the rail type of tile, or INVALID_RAILTYPE if this is no rail tile.
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391 */
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392 RailType GetTileRailType(TileIndex tile);
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393
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394 /** The ground 'under' the rail */
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395 enum RailGroundType {
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396 RAIL_GROUND_BARREN = 0, ///< Nothing (dirt)
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397 RAIL_GROUND_GRASS = 1, ///< Grassy
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398 RAIL_GROUND_FENCE_NW = 2, ///< Grass with a fence at the NW edge
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399 RAIL_GROUND_FENCE_SE = 3, ///< Grass with a fence at the SE edge
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400 RAIL_GROUND_FENCE_SENW = 4, ///< Grass with a fence at the NW and SE edges
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401 RAIL_GROUND_FENCE_NE = 5, ///< Grass with a fence at the NE edge
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402 RAIL_GROUND_FENCE_SW = 6, ///< Grass with a fence at the SW edge
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403 RAIL_GROUND_FENCE_NESW = 7, ///< Grass with a fence at the NE and SW edges
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404 RAIL_GROUND_FENCE_VERT1 = 8, ///< Grass with a fence at the eastern side
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405 RAIL_GROUND_FENCE_VERT2 = 9, ///< Grass with a fence at the western side
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406 RAIL_GROUND_FENCE_HORIZ1 = 10, ///< Grass with a fence at the southern side
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407 RAIL_GROUND_FENCE_HORIZ2 = 11, ///< Grass with a fence at the northern side
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408 RAIL_GROUND_ICE_DESERT = 12, ///< Icy or sandy
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409 RAIL_GROUND_WATER = 13, ///< Grass with a fence and shore or water on the free halftile
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410 RAIL_GROUND_HALF_SNOW = 14, ///< Snow only on higher part of slope (steep or one corner raised)
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411 };
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412
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413 static inline void SetRailGroundType(TileIndex t, RailGroundType rgt)
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414 {
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415 SB(_m[t].m4, 0, 4, rgt);
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416 }
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417
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418 static inline RailGroundType GetRailGroundType(TileIndex t)
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419 {
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420 return (RailGroundType)GB(_m[t].m4, 0, 4);
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421 }
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422
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423 static inline bool IsSnowRailGround(TileIndex t)
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424 {
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425 return GetRailGroundType(t) == RAIL_GROUND_ICE_DESERT;
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426 }
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427
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428
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429 static inline void MakeRailNormal(TileIndex t, Owner o, TrackBits b, RailType r)
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430 {
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431 SetTileType(t, MP_RAILWAY);
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432 SetTileOwner(t, o);
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433 _m[t].m2 = 0;
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434 _m[t].m3 = r;
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435 _m[t].m4 = 0;
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436 _m[t].m5 = RAIL_TILE_NORMAL << 6 | b;
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437 }
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438
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439
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440 static inline void MakeRailDepot(TileIndex t, Owner o, DiagDirection d, RailType r)
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441 {
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442 SetTileType(t, MP_RAILWAY);
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443 SetTileOwner(t, o);
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444 _m[t].m2 = 0;
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445 _m[t].m3 = r;
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446 _m[t].m4 = 0;
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447 _m[t].m5 = RAIL_TILE_DEPOT << 6 | d;
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448 }
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449
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450
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451 static inline void MakeRailWaypoint(TileIndex t, Owner o, Axis a, RailType r, uint index)
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452 {
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453 SetTileType(t, MP_RAILWAY);
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454 SetTileOwner(t, o);
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455 _m[t].m2 = index;
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456 _m[t].m3 = r;
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457 _m[t].m4 = 0;
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458 _m[t].m5 = RAIL_TILE_WAYPOINT << 6 | a;
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459 }
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460
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461 #endif /* RAIL_MAP_H */