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annotate src/road_map.h @ 12411:9fdbb4594b82 draft

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(svn r16845) -Codechange: Introduction of constants for describing the bits in a WWT_MATRIX data field.
author alberth <alberth@openttd.org>
date Thu, 16 Jul 2009 16:22:23 +0000
parents ac52bf3742f4
children 299da608443d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* $Id$ */
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2
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3 /** @file road_map.h Map accessors for roads. */
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4
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5 #ifndef ROAD_MAP_H
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6 #define ROAD_MAP_H
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7
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8 #include "track_func.h"
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9 #include "rail_type.h"
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10 #include "town_type.h"
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11 #include "road_func.h"
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12 #include "tile_map.h"
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14
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15 enum RoadTileType {
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16 ROAD_TILE_NORMAL,
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17 ROAD_TILE_CROSSING,
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18 ROAD_TILE_DEPOT
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19 };
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21 static inline RoadTileType GetRoadTileType(TileIndex t)
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22 {
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23 assert(IsTileType(t, MP_ROAD));
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24 return (RoadTileType)GB(_m[t].m5, 6, 2);
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25 }
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27 static inline bool IsNormalRoad(TileIndex t)
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28 {
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29 return GetRoadTileType(t) == ROAD_TILE_NORMAL;
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30 }
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32 static inline bool IsNormalRoadTile(TileIndex t)
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33 {
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34 return IsTileType(t, MP_ROAD) && IsNormalRoad(t);
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35 }
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36
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37 static inline bool IsLevelCrossing(TileIndex t)
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38 {
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39 return GetRoadTileType(t) == ROAD_TILE_CROSSING;
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40 }
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42 static inline bool IsLevelCrossingTile(TileIndex t)
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43 {
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44 return IsTileType(t, MP_ROAD) && IsLevelCrossing(t);
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45 }
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46
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47 static inline bool IsRoadDepot(TileIndex t)
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48 {
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49 return GetRoadTileType(t) == ROAD_TILE_DEPOT;
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50 }
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52 static inline bool IsRoadDepotTile(TileIndex t)
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53 {
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54 return IsTileType(t, MP_ROAD) && IsRoadDepot(t);
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55 }
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56
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57 static inline RoadBits GetRoadBits(TileIndex t, RoadType rt)
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58 {
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59 assert(IsNormalRoad(t));
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60 switch (rt) {
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61 default: NOT_REACHED();
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62 case ROADTYPE_ROAD: return (RoadBits)GB(_m[t].m5, 0, 4);
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63 case ROADTYPE_TRAM: return (RoadBits)GB(_m[t].m3, 0, 4);
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64 }
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65 }
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66
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67 /**
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68 * Get all RoadBits set on a tile except from the given RoadType
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69 *
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70 * @param t The tile from which we want to get the RoadBits
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71 * @param rt The RoadType which we exclude from the querry
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72 * @return all set RoadBits of the tile which are not from the given RoadType
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73 */
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74 static inline RoadBits GetOtherRoadBits(TileIndex t, RoadType rt)
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75 {
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76 return GetRoadBits(t, rt == ROADTYPE_ROAD ? ROADTYPE_TRAM : ROADTYPE_ROAD);
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77 }
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78
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79 /**
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80 * Get all set RoadBits on the given tile
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81 *
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82 * @param tile The tile from which we want to get the RoadBits
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83 * @return all set RoadBits of the tile
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84 */
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85 static inline RoadBits GetAllRoadBits(TileIndex tile)
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86 {
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87 return GetRoadBits(tile, ROADTYPE_ROAD) | GetRoadBits(tile, ROADTYPE_TRAM);
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88 }
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89
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90 static inline void SetRoadBits(TileIndex t, RoadBits r, RoadType rt)
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91 {
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92 assert(IsNormalRoad(t)); // XXX incomplete
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93 switch (rt) {
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94 default: NOT_REACHED();
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95 case ROADTYPE_ROAD: SB(_m[t].m5, 0, 4, r); break;
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96 case ROADTYPE_TRAM: SB(_m[t].m3, 0, 4, r); break;
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97 }
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98 }
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99
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100 static inline RoadTypes GetRoadTypes(TileIndex t)
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101 {
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102 return (RoadTypes)GB(_me[t].m7, 6, 2);
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103 }
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104
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105 static inline void SetRoadTypes(TileIndex t, RoadTypes rt)
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106 {
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107 assert(IsTileType(t, MP_ROAD) || IsTileType(t, MP_STATION) || IsTileType(t, MP_TUNNELBRIDGE));
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108 SB(_me[t].m7, 6, 2, rt);
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109 }
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110
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111 static inline bool HasTileRoadType(TileIndex t, RoadType rt)
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diff changeset
112 {
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113 return HasBit(GetRoadTypes(t), rt);
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114 }
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115
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116 static inline Owner GetRoadOwner(TileIndex t, RoadType rt)
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117 {
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118 switch (rt) {
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119 default: NOT_REACHED();
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120 case ROADTYPE_ROAD: return (Owner)GB(IsNormalRoadTile(t) ? _m[t].m1 : _me[t].m7, 0, 5);
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121 case ROADTYPE_TRAM: {
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122 /* Trams don't need OWNER_TOWN, and remapping OWNER_NONE
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123 * to OWNER_TOWN makes it use one bit less */
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124 Owner o = (Owner)GB(_m[t].m3, 4, 4);
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125 return o == OWNER_TOWN ? OWNER_NONE : o;
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126 }
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127 }
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128 }
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129
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130 static inline void SetRoadOwner(TileIndex t, RoadType rt, Owner o)
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131 {
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132 switch (rt) {
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133 default: NOT_REACHED();
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134 case ROADTYPE_ROAD: SB(IsNormalRoadTile(t) ? _m[t].m1 : _me[t].m7, 0, 5, o); break;
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135 case ROADTYPE_TRAM: SB(_m[t].m3, 4, 4, o == OWNER_NONE ? OWNER_TOWN : o); break;
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136 }
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137 }
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138
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139 static inline bool IsRoadOwner(TileIndex t, RoadType rt, Owner o)
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140 {
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141 assert(HasTileRoadType(t, rt));
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142 return (GetRoadOwner(t, rt) == o);
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143 }
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144
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145 /** Checks if given tile has town owned road
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146 * @param t tile to check
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147 * @return true iff tile has road and the road is owned by a town
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148 * @pre IsTileType(t, MP_ROAD)
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149 */
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150 static inline bool HasTownOwnedRoad(TileIndex t)
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151 {
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152 return HasTileRoadType(t, ROADTYPE_ROAD) && IsRoadOwner(t, ROADTYPE_ROAD, OWNER_TOWN);
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153 }
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154
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155 /** Which directions are disallowed ? */
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156 enum DisallowedRoadDirections {
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157 DRD_NONE, ///< None of the directions are disallowed
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158 DRD_SOUTHBOUND, ///< All southbound traffic is disallowed
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159 DRD_NORTHBOUND, ///< All northbound traffic is disallowed
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160 DRD_BOTH, ///< All directions are disallowed
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161 DRD_END
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162 };
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163 DECLARE_ENUM_AS_BIT_SET(DisallowedRoadDirections);
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164
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165 /**
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166 * Gets the disallowed directions
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167 * @param t the tile to get the directions from
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168 * @return the disallowed directions
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169 */
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diff changeset
170 static inline DisallowedRoadDirections GetDisallowedRoadDirections(TileIndex t)
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171 {
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diff changeset
172 assert(IsNormalRoad(t));
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173 return (DisallowedRoadDirections)GB(_m[t].m5, 4, 2);
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174 }
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175
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176 /**
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177 * Sets the disallowed directions
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178 * @param t the tile to set the directions for
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179 * @param drd the disallowed directions
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180 */
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diff changeset
181 static inline void SetDisallowedRoadDirections(TileIndex t, DisallowedRoadDirections drd)
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182 {
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diff changeset
183 assert(IsNormalRoad(t));
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diff changeset
184 assert(drd < DRD_END);
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185 SB(_m[t].m5, 4, 2, drd);
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186 }
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187
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188 static inline Axis GetCrossingRoadAxis(TileIndex t)
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189 {
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diff changeset
190 assert(IsLevelCrossing(t));
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191 return (Axis)GB(_m[t].m5, 0, 1);
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192 }
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193
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diff changeset
194 static inline Axis GetCrossingRailAxis(TileIndex t)
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diff changeset
195 {
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diff changeset
196 assert(IsLevelCrossing(t));
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197 return OtherAxis((Axis)GetCrossingRoadAxis(t));
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diff changeset
198 }
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diff changeset
199
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200 static inline RoadBits GetCrossingRoadBits(TileIndex tile)
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201 {
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202 return GetCrossingRoadAxis(tile) == AXIS_X ? ROAD_X : ROAD_Y;
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203 }
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204
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diff changeset
205 static inline Track GetCrossingRailTrack(TileIndex tile)
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diff changeset
206 {
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diff changeset
207 return AxisToTrack(GetCrossingRailAxis(tile));
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208 }
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209
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210 static inline TrackBits GetCrossingRailBits(TileIndex tile)
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211 {
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212 return AxisToTrackBits(GetCrossingRailAxis(tile));
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213 }
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214
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215
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216 /**
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217 * Get the reservation state of the rail crossing
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218 * @pre IsLevelCrossingTile(t)
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219 * @param t the crossing tile
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220 * @return reservation state
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221 */
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222 static inline bool GetCrossingReservation(TileIndex t)
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223 {
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224 assert(IsLevelCrossingTile(t));
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225 return HasBit(_m[t].m5, 4);
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226 }
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227
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228 /**
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229 * Set the reservation state of the rail crossing
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230 * @note Works for both waypoints and rail depots
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231 * @pre IsLevelCrossingTile(t)
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232 * @param t the crossing tile
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233 * @param b the reservation state
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234 */
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235 static inline void SetCrossingReservation(TileIndex t, bool b)
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236 {
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237 assert(IsLevelCrossingTile(t));
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238 SB(_m[t].m5, 4, 1, b ? 1 : 0);
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239 }
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240
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241 /**
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242 * Get the reserved track bits for a rail crossing
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243 * @pre IsLevelCrossingTile(t)
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244 * @param t the tile
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245 * @return reserved track bits
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246 */
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247 static inline TrackBits GetRailCrossingReservation(TileIndex t)
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248 {
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249 return GetCrossingReservation(t) ? GetCrossingRailBits(t) : TRACK_BIT_NONE;
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250 }
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251
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252 static inline bool IsCrossingBarred(TileIndex t)
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253 {
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254 assert(IsLevelCrossing(t));
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255 return HasBit(_m[t].m5, 5);
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256 }
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257
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258 static inline void SetCrossingBarred(TileIndex t, bool barred)
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259 {
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260 assert(IsLevelCrossing(t));
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261 SB(_m[t].m5, 5, 1, barred ? 1 : 0);
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262 }
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263
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264 static inline void UnbarCrossing(TileIndex t)
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265 {
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266 SetCrossingBarred(t, false);
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267 }
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268
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269 static inline void BarCrossing(TileIndex t)
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270 {
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271 SetCrossingBarred(t, true);
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272 }
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273
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274 #define IsOnDesert IsOnSnow
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275 static inline bool IsOnSnow(TileIndex t)
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276 {
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277 return HasBit(_me[t].m7, 5);
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278 }
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279
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280 #define ToggleDesert ToggleSnow
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281 static inline void ToggleSnow(TileIndex t)
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282 {
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283 ToggleBit(_me[t].m7, 5);
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284 }
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285
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286
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287 enum Roadside {
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288 ROADSIDE_BARREN = 0,
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289 ROADSIDE_GRASS = 1,
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290 ROADSIDE_PAVED = 2,
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291 ROADSIDE_STREET_LIGHTS = 3,
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292 ROADSIDE_TREES = 5,
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293 ROADSIDE_GRASS_ROAD_WORKS = 6,
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294 ROADSIDE_PAVED_ROAD_WORKS = 7
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295 };
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296
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297 static inline Roadside GetRoadside(TileIndex tile)
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298 {
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299 return (Roadside)GB(_m[tile].m6, 3, 3);
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300 }
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301
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302 static inline void SetRoadside(TileIndex tile, Roadside s)
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303 {
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304 SB(_m[tile].m6, 3, 3, s);
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305 }
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306
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307 static inline bool HasRoadWorks(TileIndex t)
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308 {
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309 return GetRoadside(t) >= ROADSIDE_GRASS_ROAD_WORKS;
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310 }
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311
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312 static inline bool IncreaseRoadWorksCounter(TileIndex t)
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313 {
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314 AB(_me[t].m7, 0, 4, 1);
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315
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316 return GB(_me[t].m7, 0, 4) == 15;
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317 }
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318
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319 static inline void StartRoadWorks(TileIndex t)
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320 {
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321 assert(!HasRoadWorks(t));
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322 /* Remove any trees or lamps in case or roadwork */
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323 switch (GetRoadside(t)) {
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324 case ROADSIDE_BARREN:
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325 case ROADSIDE_GRASS: SetRoadside(t, ROADSIDE_GRASS_ROAD_WORKS); break;
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326 default: SetRoadside(t, ROADSIDE_PAVED_ROAD_WORKS); break;
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327 }
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328 }
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329
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330 static inline void TerminateRoadWorks(TileIndex t)
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331 {
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332 assert(HasRoadWorks(t));
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333 SetRoadside(t, (Roadside)(GetRoadside(t) - ROADSIDE_GRASS_ROAD_WORKS + ROADSIDE_GRASS));
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334 /* Stop the counter */
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335 SB(_me[t].m7, 0, 4, 0);
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336 }
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337
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338
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339 static inline DiagDirection GetRoadDepotDirection(TileIndex t)
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340 {
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341 assert(IsRoadDepot(t));
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342 return (DiagDirection)GB(_m[t].m5, 0, 2);
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343 }
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344
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345
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346 /**
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347 * Returns the RoadBits on an arbitrary tile
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348 * Special behaviour:
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349 * - road depots: entrance is treated as road piece
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350 * - road tunnels: entrance is treated as road piece
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351 * - bridge ramps: start of the ramp is treated as road piece
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352 * - bridge middle parts: bridge itself is ignored
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353 *
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354 * If straight_tunnel_bridge_entrance is set a ROAD_X or ROAD_Y
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355 * for bridge ramps and tunnel entrances is returned depending
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356 * on the orientation of the tunnel or bridge.
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357 * @param tile the tile to get the road bits for
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358 * @param rt the road type to get the road bits form
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359 * @param stbe whether to return straight road bits for tunnels/bridges.
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360 * @return the road bits of the given tile
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361 */
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362 RoadBits GetAnyRoadBits(TileIndex tile, RoadType rt, bool straight_tunnel_bridge_entrance = false);
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363
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364 /**
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365 * Return if the tile is a valid tile for a crossing.
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366 *
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367 * @note function is overloaded
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368 * @param tile the curent tile
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369 * @param ax the axis of the road over the rail
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370 * @return true if it is a valid tile
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371 */
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372 bool IsPossibleCrossing(const TileIndex tile, Axis ax);
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373
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374
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375 static inline void MakeRoadNormal(TileIndex t, RoadBits bits, RoadTypes rot, TownID town, Owner road, Owner tram)
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376 {
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377 SetTileType(t, MP_ROAD);
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378 SetTileOwner(t, road);
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379 _m[t].m2 = town;
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380 _m[t].m3 = (HasBit(rot, ROADTYPE_TRAM) ? bits : 0);
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381 _m[t].m4 = 0;
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382 _m[t].m5 = (HasBit(rot, ROADTYPE_ROAD) ? bits : 0) | ROAD_TILE_NORMAL << 6;
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383 SB(_m[t].m6, 2, 4, 0);
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384 _me[t].m7 = rot << 6;
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385 SetRoadOwner(t, ROADTYPE_TRAM, tram);
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386 }
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387
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388
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389 static inline void MakeRoadCrossing(TileIndex t, Owner road, Owner tram, Owner rail, Axis roaddir, RailType rat, RoadTypes rot, uint town)
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390 {
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391 SetTileType(t, MP_ROAD);
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392 SetTileOwner(t, rail);
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393 _m[t].m2 = town;
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394 _m[t].m3 = rat;
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395 _m[t].m4 = 0;
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396 _m[t].m5 = ROAD_TILE_CROSSING << 6 | roaddir;
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397 SB(_m[t].m6, 2, 4, 0);
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398 _me[t].m7 = rot << 6 | road;
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399 SetRoadOwner(t, ROADTYPE_TRAM, tram);
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400 }
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401
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402
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403 static inline void MakeRoadDepot(TileIndex t, Owner owner, DiagDirection dir, RoadType rt, TownID town)
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404 {
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405 SetTileType(t, MP_ROAD);
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406 SetTileOwner(t, owner);
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407 _m[t].m2 = town;
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408 _m[t].m3 = 0;
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409 _m[t].m4 = 0;
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410 _m[t].m5 = ROAD_TILE_DEPOT << 6 | dir;
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411 SB(_m[t].m6, 2, 4, 0);
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412 _me[t].m7 = RoadTypeToRoadTypes(rt) << 6 | owner;
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413 SetRoadOwner(t, ROADTYPE_TRAM, owner);
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414 }
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415
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416 #endif /* ROAD_MAP_H */