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annotate src/road_map.h @ 7931:44ff7a6d801f draft

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(svn r11484) -Codechange: Remove the doubled function SetBitT and rename the remaining to fit with the naming style
author skidd13 <skidd13@openttd.org>
date Tue, 20 Nov 2007 13:35:54 +0000
parents 4d13dbed828c
children 712f252f0d4d
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 */
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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 "macros.h"
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9 #include "rail.h"
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10 #include "road.h"
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11 #include "tile.h"
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12
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13
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14 enum RoadTileType {
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15 ROAD_TILE_NORMAL,
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16 ROAD_TILE_CROSSING,
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17 ROAD_TILE_DEPOT
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18 };
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19
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20 static inline RoadTileType GetRoadTileType(TileIndex t)
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21 {
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22 assert(IsTileType(t, MP_ROAD));
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23 return (RoadTileType)GB(_m[t].m5, 6, 2);
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24 }
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25
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26 static inline bool IsLevelCrossing(TileIndex t)
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27 {
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28 return GetRoadTileType(t) == ROAD_TILE_CROSSING;
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29 }
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30
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31 static inline bool IsLevelCrossingTile(TileIndex t)
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32 {
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33 return IsTileType(t, MP_ROAD) && IsLevelCrossing(t);
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34 }
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35
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36 static inline RoadBits GetRoadBits(TileIndex t, RoadType rt)
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37 {
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38 assert(GetRoadTileType(t) == ROAD_TILE_NORMAL);
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39 switch (rt) {
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40 default: NOT_REACHED();
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41 case ROADTYPE_ROAD: return (RoadBits)GB(_m[t].m4, 0, 4);
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42 case ROADTYPE_TRAM: return (RoadBits)GB(_m[t].m4, 4, 4);
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43 case ROADTYPE_HWAY: return (RoadBits)GB(_m[t].m6, 2, 4);
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44 }
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45 }
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46
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47 static inline RoadBits GetAllRoadBits(TileIndex tile)
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48 {
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49 return GetRoadBits(tile, ROADTYPE_ROAD) | GetRoadBits(tile, ROADTYPE_TRAM) | GetRoadBits(tile, ROADTYPE_HWAY);
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50 }
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51
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52 static inline void SetRoadBits(TileIndex t, RoadBits r, RoadType rt)
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53 {
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54 assert(GetRoadTileType(t) == ROAD_TILE_NORMAL); // XXX incomplete
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55 switch (rt) {
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56 default: NOT_REACHED();
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57 case ROADTYPE_ROAD: SB(_m[t].m4, 0, 4, r); break;
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58 case ROADTYPE_TRAM: SB(_m[t].m4, 4, 4, r); break;
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59 case ROADTYPE_HWAY: SB(_m[t].m6, 2, 4, r); break;
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60 }
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61 }
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62
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63 static inline RoadTypes GetRoadTypes(TileIndex t)
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64 {
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65 if (IsTileType(t, MP_ROAD)) {
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66 return (RoadTypes)GB(_me[t].m7, 5, 3);
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67 } else {
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68 return (RoadTypes)GB(_m[t].m3, 0, 3);
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69 }
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70 }
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71
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72 static inline void SetRoadTypes(TileIndex t, RoadTypes rt)
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73 {
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74 if (IsTileType(t, MP_ROAD)) {
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75 SB(_me[t].m7, 5, 3, rt);
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76 } else {
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77 assert(IsTileType(t, MP_STATION) || IsTileType(t, MP_TUNNELBRIDGE));
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78 SB(_m[t].m3, 0, 2, rt);
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79 }
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80 }
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81
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82 static inline Owner GetRoadOwner(TileIndex t, RoadType rt)
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83 {
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84 if (!IsTileType(t, MP_ROAD)) return GetTileOwner(t);
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85
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86 switch (GetRoadTileType(t)) {
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87 default: NOT_REACHED();
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88 case ROAD_TILE_NORMAL:
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89 switch (rt) {
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90 default: NOT_REACHED();
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91 case ROADTYPE_ROAD: return (Owner)GB( _m[t].m1, 0, 5);
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92 case ROADTYPE_TRAM: {
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93 /* Trams don't need OWNER_TOWN, and remapping OWNER_NONE
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94 * to OWNER_TOWN makes it use one bit less */
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95 Owner o = (Owner)GB( _m[t].m5, 0, 4);
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96 return o == OWNER_TOWN ? OWNER_NONE : o;
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97 }
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98 case ROADTYPE_HWAY: return (Owner)GB(_me[t].m7, 0, 5);
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99 }
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100 case ROAD_TILE_CROSSING:
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101 switch (rt) {
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102 default: NOT_REACHED();
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103 case ROADTYPE_ROAD: return (Owner)GB( _m[t].m4, 0, 5);
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104 case ROADTYPE_TRAM: {
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105 /* Trams don't need OWNER_TOWN, and remapping OWNER_NONE
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106 * to OWNER_TOWN makes it use one bit less */
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107 Owner o = (Owner)GB( _m[t].m5, 0, 4);
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108 return o == OWNER_TOWN ? OWNER_NONE : o;
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109 }
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110 case ROADTYPE_HWAY: return (Owner)GB(_me[t].m7, 0, 5);
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111 }
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112 case ROAD_TILE_DEPOT: return GetTileOwner(t);
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113 }
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114 }
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115
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116 static inline void SetRoadOwner(TileIndex t, RoadType rt, Owner o)
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117 {
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118 if (!IsTileType(t, MP_ROAD)) return SetTileOwner(t, o);
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119
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120 switch (GetRoadTileType(t)) {
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121 default: NOT_REACHED();
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122 case ROAD_TILE_NORMAL:
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123 switch (rt) {
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124 default: NOT_REACHED();
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125 case ROADTYPE_ROAD: SB( _m[t].m1, 0, 5, o); break;
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126 case ROADTYPE_TRAM: SB( _m[t].m5, 0, 4, o == OWNER_NONE ? OWNER_TOWN : o); break;
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127 case ROADTYPE_HWAY: SB(_me[t].m7, 0, 5, o); break;
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128 }
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129 break;
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130 case ROAD_TILE_CROSSING:
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131 switch (rt) {
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132 default: NOT_REACHED();
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133 case ROADTYPE_ROAD: SB( _m[t].m4, 0, 5, o); break;
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134 /* Trams don't need OWNER_TOWN, and remapping OWNER_NONE
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135 * to OWNER_TOWN makes it use one bit less */
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136 case ROADTYPE_TRAM: SB( _m[t].m5, 0, 4, o == OWNER_NONE ? OWNER_TOWN : o); break;
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137 case ROADTYPE_HWAY: SB(_me[t].m7, 0, 5, o); break;
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138 }
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139 break;
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140 case ROAD_TILE_DEPOT: return SetTileOwner(t, o);
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141 }
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142 }
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143
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144 /** Which directions are disallowed ? */
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145 enum DisallowedRoadDirections {
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146 DRD_NONE, ///< None of the directions are disallowed
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147 DRD_SOUTHBOUND, ///< All southbound traffic is disallowed
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148 DRD_NORTHBOUND, ///< All northbound traffic is disallowed
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149 DRD_BOTH, ///< All directions are disallowed
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150 DRD_END
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151 };
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152 DECLARE_ENUM_AS_BIT_SET(DisallowedRoadDirections);
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153
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154 /**
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155 * Gets the disallowed directions
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156 * @param t the tile to get the directions from
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157 * @return the disallowed directions
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158 */
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159 static inline DisallowedRoadDirections GetDisallowedRoadDirections(TileIndex t)
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160 {
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161 assert(GetRoadTileType(t) == ROAD_TILE_NORMAL);
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162 return (DisallowedRoadDirections)GB(_m[t].m5, 4, 2);
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163 }
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164
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165 /**
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166 * Sets the disallowed directions
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167 * @param t the tile to set the directions for
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168 * @param drd the disallowed directions
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169 */
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170 static inline void SetDisallowedRoadDirections(TileIndex t, DisallowedRoadDirections drd)
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171 {
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172 assert(GetRoadTileType(t) == ROAD_TILE_NORMAL);
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173 assert(drd < DRD_END);
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174 SB(_m[t].m5, 4, 2, drd);
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175 }
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176
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177 static inline Axis GetCrossingRoadAxis(TileIndex t)
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178 {
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179 assert(GetRoadTileType(t) == ROAD_TILE_CROSSING);
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180 return (Axis)GB(_m[t].m4, 6, 1);
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181 }
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182
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183 static inline RoadBits GetCrossingRoadBits(TileIndex tile)
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184 {
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185 return GetCrossingRoadAxis(tile) == AXIS_X ? ROAD_X : ROAD_Y;
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186 }
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187
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188 static inline TrackBits GetCrossingRailBits(TileIndex tile)
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189 {
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190 return AxisToTrackBits(OtherAxis(GetCrossingRoadAxis(tile)));
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191 }
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192
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193
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194 static inline void UnbarCrossing(TileIndex t)
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195 {
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196 assert(GetRoadTileType(t) == ROAD_TILE_CROSSING);
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197 ClrBit(_m[t].m4, 5);
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198 }
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199
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200 static inline void BarCrossing(TileIndex t)
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201 {
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202 assert(GetRoadTileType(t) == ROAD_TILE_CROSSING);
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203 SetBit(_m[t].m4, 5);
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204 }
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205
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206 static inline bool IsCrossingBarred(TileIndex t)
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207 {
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208 assert(GetRoadTileType(t) == ROAD_TILE_CROSSING);
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209 return HasBit(_m[t].m4, 5);
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210 }
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211
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212 #define IsOnDesert IsOnSnow
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213 static inline bool IsOnSnow(TileIndex t)
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214 {
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215 return HasBit(_m[t].m3, 7);
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216 }
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217
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218 #define ToggleDesert ToggleSnow
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219 static inline void ToggleSnow(TileIndex t)
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220 {
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221 TOGGLEBIT(_m[t].m3, 7);
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222 }
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223
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224
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225 enum Roadside {
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226 ROADSIDE_BARREN = 0,
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227 ROADSIDE_GRASS = 1,
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228 ROADSIDE_PAVED = 2,
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229 ROADSIDE_STREET_LIGHTS = 3,
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230 ROADSIDE_TREES = 5,
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231 ROADSIDE_GRASS_ROAD_WORKS = 6,
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232 ROADSIDE_PAVED_ROAD_WORKS = 7
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233 };
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234
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235 static inline Roadside GetRoadside(TileIndex tile)
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236 {
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237 return (Roadside)GB(_m[tile].m3, 4, 3);
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238 }
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239
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240 static inline void SetRoadside(TileIndex tile, Roadside s)
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241 {
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242 SB(_m[tile].m3, 4, 3, s);
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243 }
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244
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245 static inline bool HasRoadWorks(TileIndex t)
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246 {
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247 return GetRoadside(t) >= ROADSIDE_GRASS_ROAD_WORKS;
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248 }
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249
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250 static inline bool IncreaseRoadWorksCounter(TileIndex t)
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251 {
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252 AB(_m[t].m3, 0, 4, 1);
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253
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254 return GB(_m[t].m3, 0, 4) == 15;
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255 }
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256
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257 static inline void StartRoadWorks(TileIndex t)
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258 {
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259 assert(!HasRoadWorks(t));
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260 /* Remove any trees or lamps in case or roadwork */
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261 switch (GetRoadside(t)) {
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262 case ROADSIDE_BARREN:
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263 case ROADSIDE_GRASS: SetRoadside(t, ROADSIDE_GRASS_ROAD_WORKS); break;
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264 default: SetRoadside(t, ROADSIDE_PAVED_ROAD_WORKS); break;
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265 }
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266 }
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267
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268 static inline void TerminateRoadWorks(TileIndex t)
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269 {
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270 assert(HasRoadWorks(t));
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271 SetRoadside(t, (Roadside)(GetRoadside(t) - ROADSIDE_GRASS_ROAD_WORKS + ROADSIDE_GRASS));
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272 /* Stop the counter */
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273 SB(_m[t].m3, 0, 4, 0);
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274 }
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275
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276
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277 static inline DiagDirection GetRoadDepotDirection(TileIndex t)
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278 {
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279 assert(GetRoadTileType(t) == ROAD_TILE_DEPOT);
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280 return (DiagDirection)GB(_m[t].m5, 0, 2);
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281 }
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282
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283
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284 /**
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285 * Returns the RoadBits on an arbitrary tile
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286 * Special behaviour:
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287 * - road depots: entrance is treated as road piece
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288 * - road tunnels: entrance is treated as road piece
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289 * - bridge ramps: start of the ramp is treated as road piece
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290 * - bridge middle parts: bridge itself is ignored
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291 * @param tile the tile to get the road bits for
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292 * @param rt the road type to get the road bits form
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293 * @return the road bits of the given tile
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294 */
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295 RoadBits GetAnyRoadBits(TileIndex tile, RoadType rt);
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296
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297 /**
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298 * Get the accessible track bits for the given tile.
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299 * Special behaviour:
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300 * - road depots: no track bits
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301 * - non-drive-through stations: no track bits
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302 * @param tile the tile to get the track bits for
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303 * @return the track bits for the given tile
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304 */
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305 TrackBits GetAnyRoadTrackBits(TileIndex tile, RoadType rt);
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306
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307
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308 static inline void MakeRoadNormal(TileIndex t, RoadBits bits, RoadTypes rot, TownID town, Owner road, Owner tram, Owner hway)
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309 {
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310 SetTileType(t, MP_ROAD);
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311 SetTileOwner(t, road);
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312 _m[t].m2 = town;
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313 _m[t].m3 = 0;
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314 _m[t].m4 = (HasBit(rot, ROADTYPE_TRAM) ? bits : 0) << 4 | (HasBit(rot, ROADTYPE_ROAD) ? bits : 0);
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315 _m[t].m5 = ROAD_TILE_NORMAL << 6;
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316 SetRoadOwner(t, ROADTYPE_TRAM, tram);
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317 SB(_m[t].m6, 2, 4, HasBit(rot, ROADTYPE_HWAY) ? bits : 0);
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318 _me[t].m7 = rot << 5 | hway;
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319 }
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320
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321
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322 static inline void MakeRoadCrossing(TileIndex t, Owner road, Owner tram, Owner hway, Owner rail, Axis roaddir, RailType rat, RoadTypes rot, uint town)
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323 {
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324 SetTileType(t, MP_ROAD);
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325 SetTileOwner(t, rail);
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326 _m[t].m2 = town;
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327 _m[t].m3 = rat;
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328 _m[t].m4 = roaddir << 6 | road;
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329 _m[t].m5 = ROAD_TILE_CROSSING << 6;
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330 SetRoadOwner(t, ROADTYPE_TRAM, tram);
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331 SB(_m[t].m6, 2, 4, 0);
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332 _me[t].m7 = rot << 5 | hway;
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333 }
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334
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335
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336 static inline void MakeRoadDepot(TileIndex t, Owner owner, DiagDirection dir, RoadType rt)
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337 {
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338 SetTileType(t, MP_ROAD);
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339 SetTileOwner(t, owner);
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340 _m[t].m2 = 0;
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341 _m[t].m3 = 0;
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342 _m[t].m4 = 0;
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343 _m[t].m5 = ROAD_TILE_DEPOT << 6 | dir;
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344 SB(_m[t].m6, 2, 4, 0);
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345 _me[t].m7 = RoadTypeToRoadTypes(rt) << 5;
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346 }
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347
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348 #endif /* ROAD_MAP_H */