road_map.h

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00001 /* $Id: road_map.h 15711 2009-03-14 18:16:29Z rubidium $ */
00002 
00005 #ifndef ROAD_MAP_H
00006 #define ROAD_MAP_H
00007 
00008 #include "track_func.h"
00009 #include "rail_type.h"
00010 #include "town_type.h"
00011 #include "road_func.h"
00012 #include "tile_map.h"
00013 
00014 
00015 enum RoadTileType {
00016   ROAD_TILE_NORMAL,
00017   ROAD_TILE_CROSSING,
00018   ROAD_TILE_DEPOT
00019 };
00020 
00021 static inline RoadTileType GetRoadTileType(TileIndex t)
00022 {
00023   assert(IsTileType(t, MP_ROAD));
00024   return (RoadTileType)GB(_m[t].m5, 6, 2);
00025 }
00026 
00027 static inline bool IsNormalRoad(TileIndex t)
00028 {
00029   return GetRoadTileType(t) == ROAD_TILE_NORMAL;
00030 }
00031 
00032 static inline bool IsNormalRoadTile(TileIndex t)
00033 {
00034   return IsTileType(t, MP_ROAD) && IsNormalRoad(t);
00035 }
00036 
00037 static inline bool IsLevelCrossing(TileIndex t)
00038 {
00039   return GetRoadTileType(t) == ROAD_TILE_CROSSING;
00040 }
00041 
00042 static inline bool IsLevelCrossingTile(TileIndex t)
00043 {
00044   return IsTileType(t, MP_ROAD) && IsLevelCrossing(t);
00045 }
00046 
00047 static inline bool IsRoadDepot(TileIndex t)
00048 {
00049   return GetRoadTileType(t) == ROAD_TILE_DEPOT;
00050 }
00051 
00052 static inline bool IsRoadDepotTile(TileIndex t)
00053 {
00054   return IsTileType(t, MP_ROAD) && IsRoadDepot(t);
00055 }
00056 
00057 static inline RoadBits GetRoadBits(TileIndex t, RoadType rt)
00058 {
00059   assert(IsNormalRoad(t));
00060   switch (rt) {
00061     default: NOT_REACHED();
00062     case ROADTYPE_ROAD: return (RoadBits)GB(_m[t].m5, 0, 4);
00063     case ROADTYPE_TRAM: return (RoadBits)GB(_m[t].m3, 0, 4);
00064   }
00065 }
00066 
00074 static inline RoadBits GetOtherRoadBits(TileIndex t, RoadType rt)
00075 {
00076   return GetRoadBits(t, rt == ROADTYPE_ROAD ? ROADTYPE_TRAM : ROADTYPE_ROAD);
00077 }
00078 
00085 static inline RoadBits GetAllRoadBits(TileIndex tile)
00086 {
00087   return GetRoadBits(tile, ROADTYPE_ROAD) | GetRoadBits(tile, ROADTYPE_TRAM);
00088 }
00089 
00090 static inline void SetRoadBits(TileIndex t, RoadBits r, RoadType rt)
00091 {
00092   assert(IsNormalRoad(t)); // XXX incomplete
00093   switch (rt) {
00094     default: NOT_REACHED();
00095     case ROADTYPE_ROAD: SB(_m[t].m5, 0, 4, r); break;
00096     case ROADTYPE_TRAM: SB(_m[t].m3, 0, 4, r); break;
00097   }
00098 }
00099 
00100 static inline RoadTypes GetRoadTypes(TileIndex t)
00101 {
00102   return (RoadTypes)GB(_me[t].m7, 6, 2);
00103 }
00104 
00105 static inline void SetRoadTypes(TileIndex t, RoadTypes rt)
00106 {
00107   assert(IsTileType(t, MP_ROAD) || IsTileType(t, MP_STATION) || IsTileType(t, MP_TUNNELBRIDGE));
00108   SB(_me[t].m7, 6, 2, rt);
00109 }
00110 
00111 static inline bool HasTileRoadType(TileIndex t, RoadType rt)
00112 {
00113   return HasBit(GetRoadTypes(t), rt);
00114 }
00115 
00116 static inline Owner GetRoadOwner(TileIndex t, RoadType rt)
00117 {
00118   switch (rt) {
00119     default: NOT_REACHED();
00120     case ROADTYPE_ROAD: return (Owner)GB(IsNormalRoadTile(t) ? _m[t].m1 : _me[t].m7, 0, 5);
00121     case ROADTYPE_TRAM: {
00122       /* Trams don't need OWNER_TOWN, and remapping OWNER_NONE
00123        * to OWNER_TOWN makes it use one bit less */
00124       Owner o = (Owner)GB(_m[t].m3, 4, 4);
00125       return o == OWNER_TOWN ? OWNER_NONE : o;
00126     }
00127   }
00128 }
00129 
00130 static inline void SetRoadOwner(TileIndex t, RoadType rt, Owner o)
00131 {
00132   switch (rt) {
00133     default: NOT_REACHED();
00134     case ROADTYPE_ROAD: SB(IsNormalRoadTile(t) ? _m[t].m1 : _me[t].m7, 0, 5, o); break;
00135     case ROADTYPE_TRAM: SB(_m[t].m3, 4, 4, o == OWNER_NONE ? OWNER_TOWN : o); break;
00136   }
00137 }
00138 
00139 static inline bool IsRoadOwner(TileIndex t, RoadType rt, Owner o)
00140 {
00141   assert(HasTileRoadType(t, rt));
00142   return (GetRoadOwner(t, rt) == o);
00143 }
00144 
00150 static inline bool HasTownOwnedRoad(TileIndex t)
00151 {
00152   return HasTileRoadType(t, ROADTYPE_ROAD) && IsRoadOwner(t, ROADTYPE_ROAD, OWNER_TOWN);
00153 }
00154 
00156 enum DisallowedRoadDirections {
00157   DRD_NONE,       
00158   DRD_SOUTHBOUND, 
00159   DRD_NORTHBOUND, 
00160   DRD_BOTH,       
00161   DRD_END
00162 };
00163 DECLARE_ENUM_AS_BIT_SET(DisallowedRoadDirections);
00164 
00170 static inline DisallowedRoadDirections GetDisallowedRoadDirections(TileIndex t)
00171 {
00172   assert(IsNormalRoad(t));
00173   return (DisallowedRoadDirections)GB(_m[t].m5, 4, 2);
00174 }
00175 
00181 static inline void SetDisallowedRoadDirections(TileIndex t, DisallowedRoadDirections drd)
00182 {
00183   assert(IsNormalRoad(t));
00184   assert(drd < DRD_END);
00185   SB(_m[t].m5, 4, 2, drd);
00186 }
00187 
00188 static inline Axis GetCrossingRoadAxis(TileIndex t)
00189 {
00190   assert(IsLevelCrossing(t));
00191   return (Axis)GB(_m[t].m5, 0, 1);
00192 }
00193 
00194 static inline Axis GetCrossingRailAxis(TileIndex t)
00195 {
00196   assert(IsLevelCrossing(t));
00197   return OtherAxis((Axis)GetCrossingRoadAxis(t));
00198 }
00199 
00200 static inline RoadBits GetCrossingRoadBits(TileIndex tile)
00201 {
00202   return GetCrossingRoadAxis(tile) == AXIS_X ? ROAD_X : ROAD_Y;
00203 }
00204 
00205 static inline Track GetCrossingRailTrack(TileIndex tile)
00206 {
00207   return AxisToTrack(GetCrossingRailAxis(tile));
00208 }
00209 
00210 static inline TrackBits GetCrossingRailBits(TileIndex tile)
00211 {
00212   return AxisToTrackBits(GetCrossingRailAxis(tile));
00213 }
00214 
00215 
00222 static inline bool GetCrossingReservation(TileIndex t)
00223 {
00224   assert(IsLevelCrossingTile(t));
00225   return HasBit(_m[t].m5, 4);
00226 }
00227 
00235 static inline void SetCrossingReservation(TileIndex t, bool b)
00236 {
00237   assert(IsLevelCrossingTile(t));
00238   SB(_m[t].m5, 4, 1, b ? 1 : 0);
00239 }
00240 
00247 static inline TrackBits GetRailCrossingReservation(TileIndex t)
00248 {
00249   return GetCrossingReservation(t) ? GetCrossingRailBits(t) : TRACK_BIT_NONE;
00250 }
00251 
00252 static inline bool IsCrossingBarred(TileIndex t)
00253 {
00254   assert(IsLevelCrossing(t));
00255   return HasBit(_m[t].m5, 5);
00256 }
00257 
00258 static inline void SetCrossingBarred(TileIndex t, bool barred)
00259 {
00260   assert(IsLevelCrossing(t));
00261   SB(_m[t].m5, 5, 1, barred ? 1 : 0);
00262 }
00263 
00264 static inline void UnbarCrossing(TileIndex t)
00265 {
00266   SetCrossingBarred(t, false);
00267 }
00268 
00269 static inline void BarCrossing(TileIndex t)
00270 {
00271   SetCrossingBarred(t, true);
00272 }
00273 
00274 #define IsOnDesert IsOnSnow
00275 static inline bool IsOnSnow(TileIndex t)
00276 {
00277   return HasBit(_me[t].m7, 5);
00278 }
00279 
00280 #define ToggleDesert ToggleSnow
00281 static inline void ToggleSnow(TileIndex t)
00282 {
00283   ToggleBit(_me[t].m7, 5);
00284 }
00285 
00286 
00287 enum Roadside {
00288   ROADSIDE_BARREN           = 0,
00289   ROADSIDE_GRASS            = 1,
00290   ROADSIDE_PAVED            = 2,
00291   ROADSIDE_STREET_LIGHTS    = 3,
00292   ROADSIDE_TREES            = 5,
00293   ROADSIDE_GRASS_ROAD_WORKS = 6,
00294   ROADSIDE_PAVED_ROAD_WORKS = 7
00295 };
00296 
00297 static inline Roadside GetRoadside(TileIndex tile)
00298 {
00299   return (Roadside)GB(_m[tile].m6, 3, 3);
00300 }
00301 
00302 static inline void SetRoadside(TileIndex tile, Roadside s)
00303 {
00304   SB(_m[tile].m6, 3, 3, s);
00305 }
00306 
00307 static inline bool HasRoadWorks(TileIndex t)
00308 {
00309   return GetRoadside(t) >= ROADSIDE_GRASS_ROAD_WORKS;
00310 }
00311 
00312 static inline bool IncreaseRoadWorksCounter(TileIndex t)
00313 {
00314   AB(_me[t].m7, 0, 4, 1);
00315 
00316   return GB(_me[t].m7, 0, 4) == 15;
00317 }
00318 
00319 static inline void StartRoadWorks(TileIndex t)
00320 {
00321   assert(!HasRoadWorks(t));
00322   /* Remove any trees or lamps in case or roadwork */
00323   switch (GetRoadside(t)) {
00324     case ROADSIDE_BARREN:
00325     case ROADSIDE_GRASS:  SetRoadside(t, ROADSIDE_GRASS_ROAD_WORKS); break;
00326     default:              SetRoadside(t, ROADSIDE_PAVED_ROAD_WORKS); break;
00327   }
00328 }
00329 
00330 static inline void TerminateRoadWorks(TileIndex t)
00331 {
00332   assert(HasRoadWorks(t));
00333   SetRoadside(t, (Roadside)(GetRoadside(t) - ROADSIDE_GRASS_ROAD_WORKS + ROADSIDE_GRASS));
00334   /* Stop the counter */
00335   SB(_me[t].m7, 0, 4, 0);
00336 }
00337 
00338 
00339 static inline DiagDirection GetRoadDepotDirection(TileIndex t)
00340 {
00341   assert(IsRoadDepot(t));
00342   return (DiagDirection)GB(_m[t].m5, 0, 2);
00343 }
00344 
00345 
00362 RoadBits GetAnyRoadBits(TileIndex tile, RoadType rt, bool straight_tunnel_bridge_entrance = false);
00363 
00372 TrackBits GetAnyRoadTrackBits(TileIndex tile, RoadType rt);
00373 
00382 bool IsPossibleCrossing(const TileIndex tile, Axis ax);
00383 
00384 
00385 static inline void MakeRoadNormal(TileIndex t, RoadBits bits, RoadTypes rot, TownID town, Owner road, Owner tram)
00386 {
00387   SetTileType(t, MP_ROAD);
00388   SetTileOwner(t, road);
00389   _m[t].m2 = town;
00390   _m[t].m3 = (HasBit(rot, ROADTYPE_TRAM) ? bits : 0);
00391   _m[t].m4 = 0;
00392   _m[t].m5 = (HasBit(rot, ROADTYPE_ROAD) ? bits : 0) | ROAD_TILE_NORMAL << 6;
00393   SB(_m[t].m6, 2, 4, 0);
00394   _me[t].m7 = rot << 6;
00395   SetRoadOwner(t, ROADTYPE_TRAM, tram);
00396 }
00397 
00398 
00399 static inline void MakeRoadCrossing(TileIndex t, Owner road, Owner tram, Owner rail, Axis roaddir, RailType rat, RoadTypes rot, uint town)
00400 {
00401   SetTileType(t, MP_ROAD);
00402   SetTileOwner(t, rail);
00403   _m[t].m2 = town;
00404   _m[t].m3 = rat;
00405   _m[t].m4 = 0;
00406   _m[t].m5 = ROAD_TILE_CROSSING << 6 | roaddir;
00407   SB(_m[t].m6, 2, 4, 0);
00408   _me[t].m7 = rot << 6 | road;
00409   SetRoadOwner(t, ROADTYPE_TRAM, tram);
00410 }
00411 
00412 
00413 static inline void MakeRoadDepot(TileIndex t, Owner owner, DiagDirection dir, RoadType rt, TownID town)
00414 {
00415   SetTileType(t, MP_ROAD);
00416   SetTileOwner(t, owner);
00417   _m[t].m2 = town;
00418   _m[t].m3 = 0;
00419   _m[t].m4 = 0;
00420   _m[t].m5 = ROAD_TILE_DEPOT << 6 | dir;
00421   SB(_m[t].m6, 2, 4, 0);
00422   _me[t].m7 = RoadTypeToRoadTypes(rt) << 6 | owner;
00423   SetRoadOwner(t, ROADTYPE_TRAM, owner);
00424 }
00425 
00426 #endif /* ROAD_MAP_H */

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