road_cmd.cpp

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00001 /* $Id: road_cmd.cpp 17456 2009-09-07 14:09:45Z rubidium $ */
00002 
00005 #include "stdafx.h"
00006 #include "openttd.h"
00007 #include "cmd_helper.h"
00008 #include "road_internal.h"
00009 #include "landscape.h"
00010 #include "town_map.h"
00011 #include "viewport_func.h"
00012 #include "command_func.h"
00013 #include "yapf/yapf.h"
00014 #include "depot_base.h"
00015 #include "newgrf.h"
00016 #include "station_map.h"
00017 #include "variables.h"
00018 #include "autoslope.h"
00019 #include "tunnelbridge_map.h"
00020 #include "window_func.h"
00021 #include "strings_func.h"
00022 #include "vehicle_func.h"
00023 #include "sound_func.h"
00024 #include "tunnelbridge.h"
00025 #include "cheat_type.h"
00026 #include "functions.h"
00027 #include "effectvehicle_func.h"
00028 #include "elrail_func.h"
00029 #include "roadveh.h"
00030 
00031 #include "table/sprites.h"
00032 #include "table/strings.h"
00033 
00038 bool RoadVehiclesAreBuilt()
00039 {
00040   const Vehicle *v;
00041 
00042   FOR_ALL_VEHICLES(v) {
00043     if (v->type == VEH_ROAD) return true;
00044   }
00045   return false;
00046 }
00047 
00048 #define M(x) (1 << (x))
00049 /* Level crossings may only be built on these slopes */
00050 static const uint32 VALID_LEVEL_CROSSING_SLOPES = (M(SLOPE_SEN) | M(SLOPE_ENW) | M(SLOPE_NWS) | M(SLOPE_NS) | M(SLOPE_WSE) | M(SLOPE_EW) | M(SLOPE_FLAT));
00051 #undef M
00052 
00053 /* Invalid RoadBits on slopes  */
00054 static const RoadBits _invalid_tileh_slopes_road[2][15] = {
00055   /* The inverse of the mixable RoadBits on a leveled slope */
00056   {
00057     ROAD_NONE,         // SLOPE_FLAT
00058     ROAD_NE | ROAD_SE, // SLOPE_W
00059     ROAD_NE | ROAD_NW, // SLOPE_S
00060 
00061     ROAD_NE,           // SLOPE_SW
00062     ROAD_NW | ROAD_SW, // SLOPE_E
00063     ROAD_NONE,         // SLOPE_EW
00064 
00065     ROAD_NW,           // SLOPE_SE
00066     ROAD_NONE,         // SLOPE_WSE
00067     ROAD_SE | ROAD_SW, // SLOPE_N
00068 
00069     ROAD_SE,           // SLOPE_NW
00070     ROAD_NONE,         // SLOPE_NS
00071     ROAD_NONE,         // SLOPE_ENW
00072 
00073     ROAD_SW,           // SLOPE_NE
00074     ROAD_NONE,         // SLOPE_SEN
00075     ROAD_NONE          // SLOPE_NWS
00076   },
00077   /* The inverse of the allowed straight roads on a slope
00078    * (with and without a foundation). */
00079   {
00080     ROAD_NONE, // SLOPE_FLAT
00081     ROAD_NONE, // SLOPE_W    Foundation
00082     ROAD_NONE, // SLOPE_S    Foundation
00083 
00084     ROAD_Y,    // SLOPE_SW
00085     ROAD_NONE, // SLOPE_E    Foundation
00086     ROAD_ALL,  // SLOPE_EW
00087 
00088     ROAD_X,    // SLOPE_SE
00089     ROAD_ALL,  // SLOPE_WSE
00090     ROAD_NONE, // SLOPE_N    Foundation
00091 
00092     ROAD_X,    // SLOPE_NW
00093     ROAD_ALL,  // SLOPE_NS
00094     ROAD_ALL,  // SLOPE_ENW
00095 
00096     ROAD_Y,    // SLOPE_NE
00097     ROAD_ALL,  // SLOPE_SEN
00098     ROAD_ALL   // SLOPE_NW
00099   }
00100 };
00101 
00102 Foundation GetRoadFoundation(Slope tileh, RoadBits bits);
00103 
00114 bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, Owner owner, RoadType rt, DoCommandFlag flags, bool town_check)
00115 {
00116   if (_game_mode == GM_EDITOR || remove == ROAD_NONE) return true;
00117 
00118   /* Water can always flood and towns can always remove "normal" road pieces.
00119    * Towns are not be allowed to remove non "normal" road pieces, like tram
00120    * tracks as that would result in trams that cannot turn. */
00121   if (_current_company == OWNER_WATER ||
00122       (rt == ROADTYPE_ROAD && !IsValidCompanyID(_current_company))) return true;
00123 
00124   /* Only do the special processing if the road is owned
00125    * by a town */
00126   if (owner != OWNER_TOWN) return (owner == OWNER_NONE) || CheckOwnership(owner);
00127 
00128   if (!town_check) return true;
00129 
00130   if (_cheats.magic_bulldozer.value) return true;
00131 
00132   Town *t = ClosestTownFromTile(tile, UINT_MAX);
00133   if (t == NULL) return true;
00134 
00135   /* check if you're allowed to remove the street owned by a town
00136    * removal allowance depends on difficulty setting */
00137   if (!CheckforTownRating(flags, t, ROAD_REMOVE)) return false;
00138 
00139   /* Get a bitmask of which neighbouring roads has a tile */
00140   RoadBits n = ROAD_NONE;
00141   RoadBits present = GetAnyRoadBits(tile, rt);
00142   if (present & ROAD_NE && GetAnyRoadBits(TILE_ADDXY(tile, -1,  0), rt) & ROAD_SW) n |= ROAD_NE;
00143   if (present & ROAD_SE && GetAnyRoadBits(TILE_ADDXY(tile,  0,  1), rt) & ROAD_NW) n |= ROAD_SE;
00144   if (present & ROAD_SW && GetAnyRoadBits(TILE_ADDXY(tile,  1,  0), rt) & ROAD_NE) n |= ROAD_SW;
00145   if (present & ROAD_NW && GetAnyRoadBits(TILE_ADDXY(tile,  0, -1), rt) & ROAD_SE) n |= ROAD_NW;
00146 
00147   int rating_decrease = RATING_ROAD_DOWN_STEP_EDGE;
00148   /* If 0 or 1 bits are set in n, or if no bits that match the bits to remove,
00149    * then allow it */
00150   if (KillFirstBit(n) != ROAD_NONE && (n & remove) != ROAD_NONE) {
00151     /* you can remove all kind of roads with extra dynamite */
00152     if (!_settings_game.construction.extra_dynamite) {
00153       SetDParam(0, t->index);
00154       _error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;
00155       return false;
00156     }
00157     rating_decrease = RATING_ROAD_DOWN_STEP_INNER;
00158   }
00159   ChangeTownRating(t, rating_decrease, RATING_ROAD_MINIMUM, flags);
00160 
00161   return true;
00162 }
00163 
00164 
00172 static CommandCost RemoveRoad(TileIndex tile, DoCommandFlag flags, RoadBits pieces, RoadType rt, bool crossing_check, bool town_check = true)
00173 {
00174   RoadTypes rts = GetRoadTypes(tile);
00175   /* The tile doesn't have the given road type */
00176   if (!HasBit(rts, rt)) return CMD_ERROR;
00177 
00178   switch (GetTileType(tile)) {
00179     case MP_ROAD:
00180       if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
00181       break;
00182 
00183     case MP_STATION:
00184       if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;
00185       if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
00186       break;
00187 
00188     case MP_TUNNELBRIDGE:
00189       if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) return CMD_ERROR;
00190       if (HasVehicleOnTunnelBridge(tile, GetOtherTunnelBridgeEnd(tile))) return CMD_ERROR;
00191       break;
00192 
00193     default:
00194       return CMD_ERROR;
00195   }
00196 
00197   if (!CheckAllowRemoveRoad(tile, pieces, GetRoadOwner(tile, rt), rt, flags, town_check)) return CMD_ERROR;
00198 
00199   if (!IsTileType(tile, MP_ROAD)) {
00200     /* If it's the last roadtype, just clear the whole tile */
00201     if (rts == RoadTypeToRoadTypes(rt)) return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00202 
00203     CommandCost cost(EXPENSES_CONSTRUCTION);
00204     if (IsTileType(tile, MP_TUNNELBRIDGE)) {
00205       TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
00206       /* Pay for *every* tile of the bridge or tunnel */
00207       cost.AddCost((GetTunnelBridgeLength(other_end, tile) + 2) * _price.remove_road);
00208       if (flags & DC_EXEC) {
00209         SetRoadTypes(other_end, GetRoadTypes(other_end) & ~RoadTypeToRoadTypes(rt));
00210         SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
00211 
00212         /* If the owner of the bridge sells all it's road, also move the ownership
00213          * to the owner of the other roadtype. */
00214         RoadType other_rt = (rt == ROADTYPE_ROAD) ? ROADTYPE_TRAM : ROADTYPE_ROAD;
00215         Owner other_owner = GetRoadOwner(tile, other_rt);
00216         if (other_owner != GetTileOwner(tile)) {
00217           SetTileOwner(tile, other_owner);
00218           SetTileOwner(other_end, other_owner);
00219         }
00220 
00221         /* Mark tiles diry that have been repaved */
00222         MarkTileDirtyByTile(tile);
00223         MarkTileDirtyByTile(other_end);
00224         if (IsBridge(tile)) {
00225           TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
00226 
00227           for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
00228         }
00229       }
00230     } else {
00231       assert(IsDriveThroughStopTile(tile));
00232       cost.AddCost(_price.remove_road * 2);
00233       if (flags & DC_EXEC) {
00234         SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
00235         MarkTileDirtyByTile(tile);
00236       }
00237     }
00238     return cost;
00239   }
00240 
00241   switch (GetRoadTileType(tile)) {
00242     case ROAD_TILE_NORMAL: {
00243       const Slope tileh = GetTileSlope(tile, NULL);
00244       RoadBits present = GetRoadBits(tile, rt);
00245       const RoadBits other = GetOtherRoadBits(tile, rt);
00246       const Foundation f = GetRoadFoundation(tileh, present);
00247 
00248       if (HasRoadWorks(tile) && _current_company != OWNER_WATER) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS);
00249 
00250       /* Autocomplete to a straight road
00251        * @li on steep slopes
00252        * @li if the bits of the other roadtypes result in another foundation
00253        * @li if build on slopes is disabled */
00254       if (IsSteepSlope(tileh) || (IsStraightRoad(other) &&
00255           (other & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) != ROAD_NONE) ||
00256           (tileh != SLOPE_FLAT && !_settings_game.construction.build_on_slopes)) {
00257         pieces |= MirrorRoadBits(pieces);
00258       }
00259 
00260       /* limit the bits to delete to the existing bits. */
00261       pieces &= present;
00262       if (pieces == ROAD_NONE) return CMD_ERROR;
00263 
00264       /* Now set present what it will be after the remove */
00265       present ^= pieces;
00266 
00267       /* Check for invalid RoadBit combinations on slopes */
00268       if (tileh != SLOPE_FLAT && present != ROAD_NONE &&
00269           (present & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) == present) {
00270         return CMD_ERROR;
00271       }
00272 
00273       if (flags & DC_EXEC) {
00274         if (HasRoadWorks(tile)) {
00275           /* flooding tile with road works, don't forget to remove the effect vehicle too */
00276           assert(_current_company == OWNER_WATER);
00277           Vehicle *v;
00278           FOR_ALL_VEHICLES(v) {
00279             if (v->type == VEH_EFFECT && TileVirtXY(v->x_pos, v->y_pos) == tile) {
00280               delete v;
00281             }
00282           }
00283         }
00284         if (present == ROAD_NONE) {
00285           RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
00286           if (rts == ROADTYPES_NONE) {
00287             /* Includes MarkTileDirtyByTile() */
00288             DoClearSquare(tile);
00289           } else {
00290             if (rt == ROADTYPE_ROAD && IsRoadOwner(tile, ROADTYPE_ROAD, OWNER_TOWN)) {
00291               /* Update nearest-town index */
00292               const Town *town = CalcClosestTownFromTile(tile);
00293               SetTownIndex(tile, town == NULL ? (TownID)INVALID_TOWN : town->index);
00294             }
00295             SetRoadBits(tile, ROAD_NONE, rt);
00296             SetRoadTypes(tile, rts);
00297             MarkTileDirtyByTile(tile);
00298           }
00299         } else {
00300           /* When bits are removed, you *always* end up with something that
00301            * is not a complete straight road tile. However, trams do not have
00302            * onewayness, so they cannot remove it either. */
00303           if (rt != ROADTYPE_TRAM) SetDisallowedRoadDirections(tile, DRD_NONE);
00304           SetRoadBits(tile, present, rt);
00305           MarkTileDirtyByTile(tile);
00306         }
00307       }
00308 
00309       /* If we change the foundation we have to pay for it. */
00310       return CommandCost(EXPENSES_CONSTRUCTION, CountBits(pieces) * _price.remove_road +
00311           ((GetRoadFoundation(tileh, present) != f) ? _price.terraform : (Money)0));
00312     }
00313 
00314     case ROAD_TILE_CROSSING: {
00315       if (pieces & ComplementRoadBits(GetCrossingRoadBits(tile))) {
00316         return CMD_ERROR;
00317       }
00318 
00319       /* Don't allow road to be removed from the crossing when there is tram;
00320        * we can't draw the crossing without roadbits ;) */
00321       if (rt == ROADTYPE_ROAD && HasTileRoadType(tile, ROADTYPE_TRAM) && (flags & DC_EXEC || crossing_check)) return CMD_ERROR;
00322 
00323       if (flags & DC_EXEC) {
00324         Track railtrack = GetCrossingRailTrack(tile);
00325         RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
00326         if (rts == ROADTYPES_NONE) {
00327           TrackBits tracks = GetCrossingRailBits(tile);
00328           bool reserved = GetCrossingReservation(tile);
00329           MakeRailNormal(tile, GetTileOwner(tile), tracks, GetRailType(tile));
00330           if (reserved) SetTrackReservation(tile, tracks);
00331         } else {
00332           SetRoadTypes(tile, rts);
00333           /* If we ever get HWAY and it is possible without road then we will need to promote ownership and invalidate town index here, too */
00334         }
00335         MarkTileDirtyByTile(tile);
00336         YapfNotifyTrackLayoutChange(tile, railtrack);
00337       }
00338       return CommandCost(EXPENSES_CONSTRUCTION, _price.remove_road * 2);
00339     }
00340 
00341     default:
00342     case ROAD_TILE_DEPOT:
00343       return CMD_ERROR;
00344   }
00345 }
00346 
00347 
00355 CommandCost CmdRemoveRoad(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00356 {
00357   RoadType rt = (RoadType)GB(p1, 4, 2);
00358   if (!IsValidRoadType(rt)) return CMD_ERROR;
00359 
00360   RoadBits pieces = Extract<RoadBits, 0>(p1);
00361 
00362   return RemoveRoad(tile, flags, pieces, rt, true);
00363 }
00364 
00376 static CommandCost CheckRoadSlope(Slope tileh, RoadBits *pieces, RoadBits existing, RoadBits other)
00377 {
00378   /* Remove already build pieces */
00379   CLRBITS(*pieces, existing);
00380 
00381   /* If we can't build anything stop here */
00382   if (*pieces == ROAD_NONE) return CMD_ERROR;
00383 
00384   /* All RoadBit combos are valid on flat land */
00385   if (tileh == SLOPE_FLAT) return CommandCost();
00386 
00387   /* Proceed steep Slopes first to reduce lookup table size */
00388   if (IsSteepSlope(tileh)) {
00389     /* Force straight roads. */
00390     *pieces |= MirrorRoadBits(*pieces);
00391 
00392     /* Use existing as all existing since only straight
00393      * roads are allowed here. */
00394     existing |= other;
00395 
00396     if ((existing == ROAD_NONE || existing == *pieces) && IsStraightRoad(*pieces)) {
00397       return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
00398     }
00399     return CMD_ERROR;
00400   }
00401 
00402   /* Save the merge of all bits of the current type */
00403   RoadBits type_bits = existing | *pieces;
00404 
00405   /* Roads on slopes */
00406   if (_settings_game.construction.build_on_slopes && (_invalid_tileh_slopes_road[0][tileh] & (other | type_bits)) == ROAD_NONE) {
00407 
00408     /* If we add leveling we've got to pay for it */
00409     if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
00410 
00411     return CommandCost();
00412   }
00413 
00414   /* Autocomplete uphill roads */
00415   *pieces |= MirrorRoadBits(*pieces);
00416   type_bits = existing | *pieces;
00417 
00418   /* Uphill roads */
00419   if (IsStraightRoad(type_bits) && (other == type_bits || other == ROAD_NONE) &&
00420       (_invalid_tileh_slopes_road[1][tileh] & (other | type_bits)) == ROAD_NONE) {
00421 
00422     /* Slopes with foundation ? */
00423     if (IsSlopeWithOneCornerRaised(tileh)) {
00424 
00425       /* Prevent build on slopes if it isn't allowed */
00426       if (_settings_game.construction.build_on_slopes) {
00427 
00428         /* If we add foundation we've got to pay for it */
00429         if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
00430 
00431         return CommandCost();
00432       }
00433     } else {
00434       if (CountBits(existing) == 1) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
00435       return CommandCost();
00436     }
00437   }
00438   return CMD_ERROR;
00439 }
00440 
00449 CommandCost CmdBuildRoad(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00450 {
00451   CommandCost cost(EXPENSES_CONSTRUCTION);
00452 
00453   RoadBits existing = ROAD_NONE;
00454   RoadBits other_bits = ROAD_NONE;
00455 
00456   /* Road pieces are max 4 bitset values (NE, NW, SE, SW) and town can only be non-zero
00457    * if a non-company is building the road */
00458   if ((IsValidCompanyID(_current_company) && p2 != 0) || (_current_company == OWNER_TOWN && !IsValidTownID(p2))) return CMD_ERROR;
00459   if (_current_company != OWNER_TOWN) {
00460     const Town *town = CalcClosestTownFromTile(tile);
00461     p2 = (town != NULL) ? town->index : (TownID)INVALID_TOWN;
00462   }
00463 
00464   RoadBits pieces = Extract<RoadBits, 0>(p1);
00465 
00466   /* do not allow building 'zero' road bits, code wouldn't handle it */
00467   if (pieces == ROAD_NONE) return CMD_ERROR;
00468 
00469   RoadType rt = (RoadType)GB(p1, 4, 2);
00470   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
00471 
00472   DisallowedRoadDirections toggle_drd = (DisallowedRoadDirections)GB(p1, 6, 2);
00473 
00474   Slope tileh = GetTileSlope(tile, NULL);
00475 
00476   switch (GetTileType(tile)) {
00477     case MP_ROAD:
00478       switch (GetRoadTileType(tile)) {
00479         case ROAD_TILE_NORMAL: {
00480           if (HasRoadWorks(tile)) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS);
00481 
00482           other_bits = GetOtherRoadBits(tile, rt);
00483           if (!HasTileRoadType(tile, rt)) break;
00484 
00485           existing = GetRoadBits(tile, rt);
00486           bool crossing = !IsStraightRoad(existing | pieces);
00487           if (rt != ROADTYPE_TRAM && (GetDisallowedRoadDirections(tile) != DRD_NONE || toggle_drd != DRD_NONE) && crossing) {
00488             /* Junctions cannot be one-way */
00489             return_cmd_error(STR_ERR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
00490           }
00491           if ((existing & pieces) == pieces) {
00492             /* We only want to set the (dis)allowed road directions */
00493             if (toggle_drd != DRD_NONE && rt != ROADTYPE_TRAM && IsRoadOwner(tile, ROADTYPE_ROAD, _current_company)) {
00494               if (crossing) return_cmd_error(STR_ERR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
00495 
00496               if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
00497 
00498               /* Ignore half built tiles */
00499               if (flags & DC_EXEC && rt != ROADTYPE_TRAM && IsStraightRoad(existing)) {
00500                 SetDisallowedRoadDirections(tile, GetDisallowedRoadDirections(tile) ^ toggle_drd);
00501                 MarkTileDirtyByTile(tile);
00502               }
00503               return CommandCost();
00504             }
00505             return_cmd_error(STR_1007_ALREADY_BUILT);
00506           }
00507         } break;
00508 
00509         case ROAD_TILE_CROSSING:
00510           other_bits = GetCrossingRoadBits(tile);
00511           if (pieces & ComplementRoadBits(other_bits)) goto do_clear;
00512           pieces = other_bits; // we need to pay for both roadbits
00513 
00514           if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
00515           break;
00516 
00517         case ROAD_TILE_DEPOT:
00518           if ((GetAnyRoadBits(tile, rt) & pieces) == pieces) return_cmd_error(STR_1007_ALREADY_BUILT);
00519           goto do_clear;
00520 
00521         default: NOT_REACHED();
00522       }
00523       break;
00524 
00525     case MP_RAILWAY: {
00526       if (IsSteepSlope(tileh)) {
00527         return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
00528       }
00529 
00530       /* Level crossings may only be built on these slopes */
00531       if (!HasBit(VALID_LEVEL_CROSSING_SLOPES, tileh)) {
00532         return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
00533       }
00534 
00535       if (GetRailTileType(tile) != RAIL_TILE_NORMAL) goto do_clear;
00536 
00537       Axis roaddir;
00538       switch (GetTrackBits(tile)) {
00539         case TRACK_BIT_X:
00540           if (pieces & ROAD_X) goto do_clear;
00541           roaddir = AXIS_Y;
00542           break;
00543 
00544         case TRACK_BIT_Y:
00545           if (pieces & ROAD_Y) goto do_clear;
00546           roaddir = AXIS_X;
00547           break;
00548 
00549         default: goto do_clear;
00550       }
00551 
00552       if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
00553 
00554       if (flags & DC_EXEC) {
00555         Track railtrack = AxisToTrack(OtherAxis(roaddir));
00556         YapfNotifyTrackLayoutChange(tile, railtrack);
00557         /* Always add road to the roadtypes (can't draw without it) */
00558         bool reserved = HasBit(GetTrackReservation(tile), railtrack);
00559         MakeRoadCrossing(tile, _current_company, _current_company, GetTileOwner(tile), roaddir, GetRailType(tile), RoadTypeToRoadTypes(rt) | ROADTYPES_ROAD, p2);
00560         SetCrossingReservation(tile, reserved);
00561         UpdateLevelCrossing(tile, false);
00562         MarkTileDirtyByTile(tile);
00563       }
00564       return CommandCost(EXPENSES_CONSTRUCTION, _price.build_road * (rt == ROADTYPE_ROAD ? 2 : 4));
00565     }
00566 
00567     case MP_STATION: {
00568       if ((GetAnyRoadBits(tile, rt) & pieces) == pieces) return_cmd_error(STR_1007_ALREADY_BUILT);
00569       if (!IsDriveThroughStopTile(tile)) goto do_clear;
00570 
00571       RoadBits curbits = AxisToRoadBits(DiagDirToAxis(GetRoadStopDir(tile)));
00572       if (pieces & ~curbits) goto do_clear;
00573       pieces = curbits; // we need to pay for both roadbits
00574 
00575       if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
00576     } break;
00577 
00578     case MP_TUNNELBRIDGE:
00579       if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) goto do_clear;
00580       if (MirrorRoadBits(DiagDirToRoadBits(GetTunnelBridgeDirection(tile))) != pieces) goto do_clear;
00581       if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
00582       /* Don't allow adding roadtype to the bridge/tunnel when vehicles are already driving on it */
00583       if (HasVehicleOnTunnelBridge(tile, GetOtherTunnelBridgeEnd(tile))) return CMD_ERROR;
00584       break;
00585 
00586     default: {
00587 do_clear:;
00588       CommandCost ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00589       if (CmdFailed(ret)) return ret;
00590       cost.AddCost(ret);
00591     } break;
00592   }
00593 
00594   if (other_bits != pieces) {
00595     /* Check the foundation/slopes when adding road/tram bits */
00596     CommandCost ret = CheckRoadSlope(tileh, &pieces, existing, other_bits);
00597     /* Return an error if we need to build a foundation (ret != 0) but the
00598      * current setting is turned off */
00599     if (CmdFailed(ret) || (ret.GetCost() != 0 && !_settings_game.construction.build_on_slopes)) {
00600       return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
00601     }
00602     cost.AddCost(ret);
00603   }
00604 
00605   if (IsTileType(tile, MP_ROAD)) {
00606     /* Don't put the pieces that already exist */
00607     pieces &= ComplementRoadBits(existing);
00608 
00609     /* Check if new road bits will have the same foundation as other existing road types */
00610     if (IsNormalRoad(tile)) {
00611       Slope slope = GetTileSlope(tile, NULL);
00612       Foundation found_new = GetRoadFoundation(slope, pieces | existing);
00613 
00614       /* Test if all other roadtypes can be built at that foundation */
00615       for (RoadType rtest = ROADTYPE_ROAD; rtest < ROADTYPE_END; rtest++) {
00616         if (rtest != rt) { // check only other road types
00617           RoadBits bits = GetRoadBits(tile, rtest);
00618           /* do not check if there are not road bits of given type */
00619           if (bits != ROAD_NONE && GetRoadFoundation(slope, bits) != found_new) {
00620             return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
00621           }
00622         }
00623       }
00624     }
00625   }
00626 
00627   if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
00628 
00629   cost.AddCost(CountBits(pieces) * _price.build_road);
00630   if (IsTileType(tile, MP_TUNNELBRIDGE)) {
00631     /* Pay for *every* tile of the bridge or tunnel */
00632     cost.MultiplyCost(GetTunnelBridgeLength(GetOtherTunnelBridgeEnd(tile), tile) + 2);
00633   }
00634 
00635   if (flags & DC_EXEC) {
00636     switch (GetTileType(tile)) {
00637       case MP_ROAD: {
00638         RoadTileType rtt = GetRoadTileType(tile);
00639         if (existing == ROAD_NONE || rtt == ROAD_TILE_CROSSING) {
00640           SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
00641           SetRoadOwner(tile, rt, _current_company);
00642           if (rt == ROADTYPE_ROAD) SetTownIndex(tile, p2);
00643         }
00644         if (rtt != ROAD_TILE_CROSSING) SetRoadBits(tile, existing | pieces, rt);
00645       } break;
00646 
00647       case MP_TUNNELBRIDGE: {
00648         TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
00649 
00650         SetRoadTypes(other_end, GetRoadTypes(other_end) | RoadTypeToRoadTypes(rt));
00651         SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
00652         SetRoadOwner(other_end, rt, _current_company);
00653         SetRoadOwner(tile, rt, _current_company);
00654 
00655         /* Mark tiles diry that have been repaved */
00656         MarkTileDirtyByTile(other_end);
00657         MarkTileDirtyByTile(tile);
00658         if (IsBridge(tile)) {
00659           TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
00660 
00661           for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
00662         }
00663       } break;
00664 
00665       case MP_STATION:
00666         assert(IsDriveThroughStopTile(tile));
00667         SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
00668         SetRoadOwner(tile, rt, _current_company);
00669         break;
00670 
00671       default:
00672         MakeRoadNormal(tile, pieces, RoadTypeToRoadTypes(rt), p2, _current_company, _current_company);
00673         break;
00674     }
00675 
00676     if (rt != ROADTYPE_TRAM && IsNormalRoadTile(tile)) {
00677       existing |= pieces;
00678       SetDisallowedRoadDirections(tile, IsStraightRoad(existing) ?
00679           GetDisallowedRoadDirections(tile) ^ toggle_drd : DRD_NONE);
00680     }
00681 
00682     MarkTileDirtyByTile(tile);
00683   }
00684   return cost;
00685 }
00686 
00698 CommandCost CmdBuildLongRoad(TileIndex end_tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00699 {
00700   CommandCost cost(EXPENSES_CONSTRUCTION);
00701   bool had_bridge = false;
00702   bool had_tunnel = false;
00703   bool had_success = false;
00704   DisallowedRoadDirections drd = DRD_NORTHBOUND;
00705 
00706   _error_message = INVALID_STRING_ID;
00707 
00708   if (p1 >= MapSize()) return CMD_ERROR;
00709 
00710   TileIndex start_tile = p1;
00711   RoadType rt = (RoadType)GB(p2, 3, 2);
00712   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
00713 
00714   /* Only drag in X or Y direction dictated by the direction variable */
00715   if (!HasBit(p2, 2) && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
00716   if (HasBit(p2, 2)  && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
00717 
00718   /* Swap start and ending tile, also the half-tile drag var (bit 0 and 1) */
00719   if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
00720     TileIndex t = start_tile;
00721     start_tile = end_tile;
00722     end_tile = t;
00723     p2 ^= IsInsideMM(p2 & 3, 1, 3) ? 3 : 0;
00724     drd = DRD_SOUTHBOUND;
00725   }
00726 
00727   /* On the X-axis, we have to swap the initial bits, so they
00728    * will be interpreted correctly in the GTTS. Futhermore
00729    * when you just 'click' on one tile to build them. */
00730   if (HasBit(p2, 2) == (start_tile == end_tile && HasBit(p2, 0) == HasBit(p2, 1))) drd ^= DRD_BOTH;
00731   /* No disallowed direction bits have to be toggled */
00732   if (!HasBit(p2, 5)) drd = DRD_NONE;
00733 
00734   TileIndex tile = start_tile;
00735   /* Start tile is the small number. */
00736   for (;;) {
00737     RoadBits bits = HasBit(p2, 2) ? ROAD_Y : ROAD_X;
00738 
00739     if (tile == end_tile && !HasBit(p2, 1)) bits &= ROAD_NW | ROAD_NE;
00740     if (tile == start_tile && HasBit(p2, 0)) bits &= ROAD_SE | ROAD_SW;
00741 
00742     _error_message = INVALID_STRING_ID;
00743     CommandCost ret = DoCommand(tile, drd << 6 | rt << 4 | bits, 0, flags, CMD_BUILD_ROAD);
00744     if (CmdFailed(ret)) {
00745       if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;
00746     } else {
00747       had_success = true;
00748       /* Only pay for the upgrade on one side of the bridges and tunnels */
00749       if (IsTileType(tile, MP_TUNNELBRIDGE)) {
00750         if (IsBridge(tile)) {
00751           if ((!had_bridge || GetTunnelBridgeDirection(tile) == DIAGDIR_SE || GetTunnelBridgeDirection(tile) == DIAGDIR_SW)) {
00752             cost.AddCost(ret);
00753           }
00754           had_bridge = true;
00755         } else { // IsTunnel(tile)
00756           if ((!had_tunnel || GetTunnelBridgeDirection(tile) == DIAGDIR_SE || GetTunnelBridgeDirection(tile) == DIAGDIR_SW)) {
00757             cost.AddCost(ret);
00758           }
00759           had_tunnel = true;
00760         }
00761       } else {
00762         cost.AddCost(ret);
00763       }
00764     }
00765 
00766     if (tile == end_tile) break;
00767 
00768     tile += HasBit(p2, 2) ? TileDiffXY(0, 1) : TileDiffXY(1, 0);
00769   }
00770 
00771   return !had_success ? CMD_ERROR : cost;
00772 }
00773 
00784 CommandCost CmdRemoveLongRoad(TileIndex end_tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00785 {
00786   CommandCost cost(EXPENSES_CONSTRUCTION);
00787 
00788   if (p1 >= MapSize()) return CMD_ERROR;
00789 
00790   TileIndex start_tile = p1;
00791   RoadType rt = (RoadType)GB(p2, 3, 2);
00792   if (!IsValidRoadType(rt)) return CMD_ERROR;
00793 
00794   /* Only drag in X or Y direction dictated by the direction variable */
00795   if (!HasBit(p2, 2) && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
00796   if (HasBit(p2, 2)  && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
00797 
00798   /* Swap start and ending tile, also the half-tile drag var (bit 0 and 1) */
00799   if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
00800     TileIndex t = start_tile;
00801     start_tile = end_tile;
00802     end_tile = t;
00803     p2 ^= IsInsideMM(p2 & 3, 1, 3) ? 3 : 0;
00804   }
00805 
00806   Money money = GetAvailableMoneyForCommand();
00807   TileIndex tile = start_tile;
00808   /* Start tile is the small number. */
00809   for (;;) {
00810     RoadBits bits = HasBit(p2, 2) ? ROAD_Y : ROAD_X;
00811 
00812     if (tile == end_tile && !HasBit(p2, 1)) bits &= ROAD_NW | ROAD_NE;
00813     if (tile == start_tile && HasBit(p2, 0)) bits &= ROAD_SE | ROAD_SW;
00814 
00815     /* try to remove the halves. */
00816     if (bits != 0) {
00817       CommandCost ret = RemoveRoad(tile, flags & ~DC_EXEC, bits, rt, true);
00818       if (CmdSucceeded(ret)) {
00819         if (flags & DC_EXEC) {
00820           money -= ret.GetCost();
00821           if (money < 0) {
00822             _additional_cash_required = DoCommand(end_tile, start_tile, p2, flags & ~DC_EXEC, CMD_REMOVE_LONG_ROAD).GetCost();
00823             return cost;
00824           }
00825           RemoveRoad(tile, flags, bits, rt, true, false);
00826         }
00827         cost.AddCost(ret);
00828       }
00829     }
00830 
00831     if (tile == end_tile) break;
00832 
00833     tile += HasBit(p2, 2) ? TileDiffXY(0, 1) : TileDiffXY(1, 0);
00834   }
00835 
00836   return (cost.GetCost() == 0) ? CMD_ERROR : cost;
00837 }
00838 
00849 CommandCost CmdBuildRoadDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00850 {
00851   DiagDirection dir = Extract<DiagDirection, 0>(p1);
00852   RoadType rt = (RoadType)GB(p1, 2, 2);
00853 
00854   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
00855 
00856   Slope tileh = GetTileSlope(tile, NULL);
00857   if (tileh != SLOPE_FLAT && (
00858         !_settings_game.construction.build_on_slopes ||
00859         IsSteepSlope(tileh) ||
00860         !CanBuildDepotByTileh(dir, tileh)
00861       )) {
00862     return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
00863   }
00864 
00865   CommandCost cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00866   if (CmdFailed(cost)) return CMD_ERROR;
00867 
00868   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);
00869 
00870   if (!Depot::CanAllocateItem()) return CMD_ERROR;
00871 
00872   if (flags & DC_EXEC) {
00873     Depot *dep = new Depot(tile);
00874     dep->town_index = ClosestTownFromTile(tile, UINT_MAX)->index;
00875 
00876     MakeRoadDepot(tile, _current_company, dir, rt, dep->town_index);
00877     MarkTileDirtyByTile(tile);
00878   }
00879   return cost.AddCost(_price.build_road_depot);
00880 }
00881 
00882 static CommandCost RemoveRoadDepot(TileIndex tile, DoCommandFlag flags)
00883 {
00884   if (!CheckTileOwnership(tile) && _current_company != OWNER_WATER) return CMD_ERROR;
00885 
00886   if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
00887 
00888   if (flags & DC_EXEC) {
00889     delete GetDepotByTile(tile);
00890     DoClearSquare(tile);
00891   }
00892 
00893   return CommandCost(EXPENSES_CONSTRUCTION, _price.remove_road_depot);
00894 }
00895 
00896 static CommandCost ClearTile_Road(TileIndex tile, DoCommandFlag flags)
00897 {
00898   switch (GetRoadTileType(tile)) {
00899     case ROAD_TILE_NORMAL: {
00900       RoadBits b = GetAllRoadBits(tile);
00901 
00902       /* Clear the road if only one piece is on the tile OR we are not using the DC_AUTO flag */
00903       if ((CountBits(b) == 1 && GetRoadBits(tile, ROADTYPE_TRAM) == ROAD_NONE) || !(flags & DC_AUTO)) {
00904         RoadTypes rts = GetRoadTypes(tile);
00905         CommandCost ret(EXPENSES_CONSTRUCTION);
00906         for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
00907           if (HasBit(rts, rt)) {
00908             CommandCost tmp_ret = RemoveRoad(tile, flags, GetRoadBits(tile, rt), rt, true);
00909             if (CmdFailed(tmp_ret)) return tmp_ret;
00910             ret.AddCost(tmp_ret);
00911           }
00912         }
00913         return ret;
00914       }
00915       return_cmd_error(STR_1801_MUST_REMOVE_ROAD_FIRST);
00916     }
00917 
00918     case ROAD_TILE_CROSSING: {
00919       RoadTypes rts = GetRoadTypes(tile);
00920       CommandCost ret(EXPENSES_CONSTRUCTION);
00921 
00922       if (flags & DC_AUTO) return_cmd_error(STR_1801_MUST_REMOVE_ROAD_FIRST);
00923 
00924       /* Must iterate over the roadtypes in a reverse manner because
00925        * tram tracks must be removed before the road bits. */
00926       RoadType rt = ROADTYPE_TRAM;
00927       do {
00928         if (HasBit(rts, rt)) {
00929           CommandCost tmp_ret = RemoveRoad(tile, flags, GetCrossingRoadBits(tile), rt, false);
00930           if (CmdFailed(tmp_ret)) return tmp_ret;
00931           ret.AddCost(tmp_ret);
00932         }
00933       } while (rt-- != ROADTYPE_ROAD);
00934 
00935       if (flags & DC_EXEC) {
00936         DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00937       }
00938       return ret;
00939     }
00940 
00941     default:
00942     case ROAD_TILE_DEPOT:
00943       if (flags & DC_AUTO) {
00944         return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED);
00945       }
00946       return RemoveRoadDepot(tile, flags);
00947   }
00948 }
00949 
00950 
00951 struct DrawRoadTileStruct {
00952   uint16 image;
00953   byte subcoord_x;
00954   byte subcoord_y;
00955 };
00956 
00957 #include "table/road_land.h"
00958 
00966 Foundation GetRoadFoundation(Slope tileh, RoadBits bits)
00967 {
00968   /* Flat land and land without a road doesn't require a foundation */
00969   if (tileh == SLOPE_FLAT || bits == ROAD_NONE) return FOUNDATION_NONE;
00970 
00971   if (!IsSteepSlope(tileh)) {
00972     /* Leveled RoadBits on a slope */
00973     if ((_invalid_tileh_slopes_road[0][tileh] & bits) == ROAD_NONE) return FOUNDATION_LEVELED;
00974 
00975     /* Straight roads without foundation on a slope */
00976     if (!IsSlopeWithOneCornerRaised(tileh) &&
00977         (_invalid_tileh_slopes_road[1][tileh] & bits) == ROAD_NONE)
00978       return FOUNDATION_NONE;
00979   }
00980 
00981   /* Roads on steep Slopes or on Slopes with one corner raised */
00982   return (bits == ROAD_X ? FOUNDATION_INCLINED_X : FOUNDATION_INCLINED_Y);
00983 }
00984 
00985 const byte _road_sloped_sprites[14] = {
00986   0,  0,  2,  0,
00987   0,  1,  0,  0,
00988   3,  0,  0,  0,
00989   0,  0
00990 };
00991 
01002 static bool AlwaysDrawUnpavedRoads(TileIndex tile, Roadside roadside)
01003 {
01004   return (IsOnSnow(tile) &&
01005       !(_settings_game.game_creation.landscape == LT_TROPIC && HasGrfMiscBit(GMB_DESERT_PAVED_ROADS) &&
01006         roadside != ROADSIDE_BARREN && roadside != ROADSIDE_GRASS && roadside != ROADSIDE_GRASS_ROAD_WORKS));
01007 }
01008 
01014 void DrawTramCatenary(const TileInfo *ti, RoadBits tram)
01015 {
01016   /* Do not draw catenary if it is invisible */
01017   if (IsInvisibilitySet(TO_CATENARY)) return;
01018 
01019   /* Don't draw the catenary under a low bridge */
01020   if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && !IsTransparencySet(TO_CATENARY)) {
01021     uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
01022 
01023     if (height <= GetTileMaxZ(ti->tile) + TILE_HEIGHT) return;
01024   }
01025 
01026   SpriteID front;
01027   SpriteID back;
01028 
01029   if (ti->tileh != SLOPE_FLAT) {
01030     back  = SPR_TRAMWAY_BACK_WIRES_SLOPED  + _road_sloped_sprites[ti->tileh - 1];
01031     front = SPR_TRAMWAY_FRONT_WIRES_SLOPED + _road_sloped_sprites[ti->tileh - 1];
01032   } else {
01033     back  = SPR_TRAMWAY_BASE + _road_backpole_sprites_1[tram];
01034     front = SPR_TRAMWAY_BASE + _road_frontwire_sprites_1[tram];
01035   }
01036 
01037   AddSortableSpriteToDraw(back,  PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
01038   AddSortableSpriteToDraw(front, PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
01039 }
01040 
01049 static void DrawRoadDetail(SpriteID img, const TileInfo *ti, int dx, int dy, int h)
01050 {
01051   int x = ti->x | dx;
01052   int y = ti->y | dy;
01053   byte z = ti->z;
01054   if (ti->tileh != SLOPE_FLAT) z = GetSlopeZ(x, y);
01055   AddSortableSpriteToDraw(img, PAL_NONE, x, y, 2, 2, h, z);
01056 }
01057 
01062 static void DrawRoadBits(TileInfo *ti)
01063 {
01064   RoadBits road = GetRoadBits(ti->tile, ROADTYPE_ROAD);
01065   RoadBits tram = GetRoadBits(ti->tile, ROADTYPE_TRAM);
01066 
01067   SpriteID image = 0;
01068   SpriteID pal = PAL_NONE;
01069 
01070   if (ti->tileh != SLOPE_FLAT) {
01071     DrawFoundation(ti, GetRoadFoundation(ti->tileh, road | tram));
01072 
01073     /* DrawFoundation() modifies ti.
01074      * Default sloped sprites.. */
01075     if (ti->tileh != SLOPE_FLAT) image = _road_sloped_sprites[ti->tileh - 1] + 0x53F;
01076   }
01077 
01078   if (image == 0) image = _road_tile_sprites_1[road != ROAD_NONE ? road : tram];
01079 
01080   Roadside roadside = GetRoadside(ti->tile);
01081 
01082   if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
01083     image += 19;
01084   } else {
01085     switch (roadside) {
01086       case ROADSIDE_BARREN:           pal = PALETTE_TO_BARE_LAND; break;
01087       case ROADSIDE_GRASS:            break;
01088       case ROADSIDE_GRASS_ROAD_WORKS: break;
01089       default:                        image -= 19; break; // Paved
01090     }
01091   }
01092 
01093   DrawGroundSprite(image, pal);
01094 
01095   /* For tram we overlay the road graphics with either tram tracks only
01096    * (when there is actual road beneath the trams) or with tram tracks
01097    * and some dirts which hides the road graphics */
01098   if (tram != ROAD_NONE) {
01099     if (ti->tileh != SLOPE_FLAT) {
01100       image = _road_sloped_sprites[ti->tileh - 1] + SPR_TRAMWAY_SLOPED_OFFSET;
01101     } else {
01102       image = _road_tile_sprites_1[tram] - SPR_ROAD_Y;
01103     }
01104     image += (road == ROAD_NONE) ? SPR_TRAMWAY_TRAM : SPR_TRAMWAY_OVERLAY;
01105     DrawGroundSprite(image, pal);
01106   }
01107 
01108   if (road != ROAD_NONE) {
01109     DisallowedRoadDirections drd = GetDisallowedRoadDirections(ti->tile);
01110     if (drd != DRD_NONE) {
01111       DrawRoadDetail(SPR_ONEWAY_BASE + drd - 1 + ((road == ROAD_X) ? 0 : 3), ti, 8, 8, 0);
01112     }
01113   }
01114 
01115   if (HasRoadWorks(ti->tile)) {
01116     /* Road works */
01117     DrawGroundSprite((road | tram) & ROAD_X ? SPR_EXCAVATION_X : SPR_EXCAVATION_Y, PAL_NONE);
01118     return;
01119   }
01120 
01121   if (tram != ROAD_NONE) DrawTramCatenary(ti, tram);
01122 
01123   /* Return if full detail is disabled, or we are zoomed fully out. */
01124   if (!HasBit(_display_opt, DO_FULL_DETAIL) || _cur_dpi->zoom > ZOOM_LVL_DETAIL) return;
01125 
01126   /* Do not draw details (street lights, trees) under low bridge */
01127   if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && (roadside == ROADSIDE_TREES || roadside == ROADSIDE_STREET_LIGHTS)) {
01128     uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
01129     uint minz = GetTileMaxZ(ti->tile) + 2 * TILE_HEIGHT;
01130 
01131     if (roadside == ROADSIDE_TREES) minz += TILE_HEIGHT;
01132 
01133     if (height < minz) return;
01134   }
01135 
01136   /* If there are no road bits, return, as there is nothing left to do */
01137   if (CountBits(road) < 2) return;
01138 
01139   /* Draw extra details. */
01140   for (const DrawRoadTileStruct *drts = _road_display_table[roadside][road | tram]; drts->image != 0; drts++) {
01141     DrawRoadDetail(drts->image, ti, drts->subcoord_x, drts->subcoord_y, 0x10);
01142   }
01143 }
01144 
01146 static void DrawTile_Road(TileInfo *ti)
01147 {
01148   switch (GetRoadTileType(ti->tile)) {
01149     case ROAD_TILE_NORMAL:
01150       DrawRoadBits(ti);
01151       break;
01152 
01153     case ROAD_TILE_CROSSING: {
01154       if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
01155 
01156       SpriteID image = GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.crossing;
01157       SpriteID pal = PAL_NONE;
01158 
01159       if (GetCrossingRoadAxis(ti->tile) == AXIS_X) image++;
01160       if (IsCrossingBarred(ti->tile)) image += 2;
01161 
01162       Roadside roadside = GetRoadside(ti->tile);
01163 
01164       if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
01165         image += 8;
01166       } else {
01167         switch (roadside) {
01168           case ROADSIDE_BARREN: pal = PALETTE_TO_BARE_LAND; break;
01169           case ROADSIDE_GRASS:  break;
01170           default:              image += 4; break; // Paved
01171         }
01172       }
01173 
01174       DrawGroundSprite(image, pal);
01175 
01176       /* PBS debugging, draw reserved tracks darker */
01177       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && GetCrossingReservation(ti->tile)) {
01178         DrawGroundSprite(GetCrossingRoadAxis(ti->tile) == AXIS_Y ? GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_y : GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_x, PALETTE_CRASH);
01179       }
01180 
01181       if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
01182         DrawGroundSprite(SPR_TRAMWAY_OVERLAY + (GetCrossingRoadAxis(ti->tile) ^ 1), pal);
01183         DrawTramCatenary(ti, GetCrossingRoadBits(ti->tile));
01184       }
01185       if (HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
01186       break;
01187     }
01188 
01189     default:
01190     case ROAD_TILE_DEPOT: {
01191       if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
01192 
01193       SpriteID palette = COMPANY_SPRITE_COLOUR(GetTileOwner(ti->tile));
01194 
01195       const DrawTileSprites *dts;
01196       if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
01197         dts =  &_tram_depot[GetRoadDepotDirection(ti->tile)];
01198       } else {
01199         dts =  &_road_depot[GetRoadDepotDirection(ti->tile)];
01200       }
01201 
01202       DrawGroundSprite(dts->ground.sprite, PAL_NONE);
01203 
01204       /* End now if buildings are invisible */
01205       if (IsInvisibilitySet(TO_BUILDINGS)) break;
01206 
01207       for (const DrawTileSeqStruct *dtss = dts->seq; dtss->image.sprite != 0; dtss++) {
01208         SpriteID image = dtss->image.sprite;
01209         SpriteID pal;
01210 
01211         if (!IsTransparencySet(TO_BUILDINGS) && HasBit(image, PALETTE_MODIFIER_COLOUR)) {
01212           pal = palette;
01213         } else {
01214           pal = PAL_NONE;
01215         }
01216 
01217         AddSortableSpriteToDraw(
01218           image, pal,
01219           ti->x + dtss->delta_x, ti->y + dtss->delta_y,
01220           dtss->size_x, dtss->size_y,
01221           dtss->size_z, ti->z,
01222           IsTransparencySet(TO_BUILDINGS)
01223         );
01224       }
01225       break;
01226     }
01227   }
01228   DrawBridgeMiddle(ti);
01229 }
01230 
01231 void DrawRoadDepotSprite(int x, int y, DiagDirection dir, RoadType rt)
01232 {
01233   SpriteID palette = COMPANY_SPRITE_COLOUR(_local_company);
01234   const DrawTileSprites *dts = (rt == ROADTYPE_TRAM) ? &_tram_depot[dir] : &_road_depot[dir];
01235 
01236   x += 33;
01237   y += 17;
01238 
01239   DrawSprite(dts->ground.sprite, PAL_NONE, x, y);
01240 
01241   for (const DrawTileSeqStruct *dtss = dts->seq; dtss->image.sprite != 0; dtss++) {
01242     Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z);
01243     SpriteID image = dtss->image.sprite;
01244 
01245     DrawSprite(image, HasBit(image, PALETTE_MODIFIER_COLOUR) ? palette : PAL_NONE, x + pt.x, y + pt.y);
01246   }
01247 }
01248 
01253 void UpdateNearestTownForRoadTiles(bool invalidate)
01254 {
01255   assert(!invalidate || _generating_world);
01256 
01257   for (TileIndex t = 0; t < MapSize(); t++) {
01258     if (IsTileType(t, MP_ROAD) && !HasTownOwnedRoad(t)) {
01259       TownID tid = (TownID)INVALID_TOWN;
01260       if (!invalidate) {
01261         const Town *town = CalcClosestTownFromTile(t);
01262         if (town != NULL) tid = town->index;
01263       }
01264       SetTownIndex(t, tid);
01265     }
01266   }
01267 }
01268 
01269 static uint GetSlopeZ_Road(TileIndex tile, uint x, uint y)
01270 {
01271   uint z;
01272   Slope tileh = GetTileSlope(tile, &z);
01273 
01274   if (tileh == SLOPE_FLAT) return z;
01275   if (IsNormalRoad(tile)) {
01276     Foundation f = GetRoadFoundation(tileh, GetAllRoadBits(tile));
01277     z += ApplyFoundationToSlope(f, &tileh);
01278     return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
01279   } else {
01280     return z + TILE_HEIGHT;
01281   }
01282 }
01283 
01284 static Foundation GetFoundation_Road(TileIndex tile, Slope tileh)
01285 {
01286   if (IsNormalRoad(tile)) {
01287     return GetRoadFoundation(tileh, GetAllRoadBits(tile));
01288   } else {
01289     return FlatteningFoundation(tileh);
01290   }
01291 }
01292 
01293 static void GetAcceptedCargo_Road(TileIndex tile, AcceptedCargo ac)
01294 {
01295   /* not used */
01296 }
01297 
01298 static const Roadside _town_road_types[][2] = {
01299   { ROADSIDE_GRASS,         ROADSIDE_GRASS },
01300   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
01301   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
01302   { ROADSIDE_TREES,         ROADSIDE_TREES },
01303   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
01304 };
01305 
01306 static const Roadside _town_road_types_2[][2] = {
01307   { ROADSIDE_GRASS,         ROADSIDE_GRASS },
01308   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
01309   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
01310   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
01311   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
01312 };
01313 
01314 
01315 static void TileLoop_Road(TileIndex tile)
01316 {
01317   switch (_settings_game.game_creation.landscape) {
01318     case LT_ARCTIC:
01319       if (IsOnSnow(tile) != (GetTileZ(tile) > GetSnowLine())) {
01320         ToggleSnow(tile);
01321         MarkTileDirtyByTile(tile);
01322       }
01323       break;
01324 
01325     case LT_TROPIC:
01326       if (GetTropicZone(tile) == TROPICZONE_DESERT && !IsOnDesert(tile)) {
01327         ToggleDesert(tile);
01328         MarkTileDirtyByTile(tile);
01329       }
01330       break;
01331   }
01332 
01333   if (IsRoadDepot(tile)) return;
01334 
01335   const Town *t = ClosestTownFromTile(tile, UINT_MAX);
01336   if (!HasRoadWorks(tile)) {
01337     HouseZonesBits grp = HZB_TOWN_EDGE;
01338 
01339     if (t != NULL) {
01340       grp = GetTownRadiusGroup(t, tile);
01341 
01342       /* Show an animation to indicate road work */
01343       if (t->road_build_months != 0 &&
01344           (DistanceManhattan(t->xy, tile) < 8 || grp != HZB_TOWN_EDGE) &&
01345           IsNormalRoad(tile) && CountBits(GetAllRoadBits(tile)) > 1 ) {
01346         if (GetFoundationSlope(tile, NULL) == SLOPE_FLAT && EnsureNoVehicleOnGround(tile) && Chance16(1, 40)) {
01347           StartRoadWorks(tile);
01348 
01349           SndPlayTileFx(SND_21_JACKHAMMER, tile);
01350           CreateEffectVehicleAbove(
01351             TileX(tile) * TILE_SIZE + 7,
01352             TileY(tile) * TILE_SIZE + 7,
01353             0,
01354             EV_BULLDOZER);
01355           MarkTileDirtyByTile(tile);
01356           return;
01357         }
01358       }
01359     }
01360 
01361     {
01362       /* Adjust road ground type depending on 'grp' (grp is the distance to the center) */
01363       const Roadside *new_rs = (_settings_game.game_creation.landscape == LT_TOYLAND) ? _town_road_types_2[grp] : _town_road_types[grp];
01364       Roadside cur_rs = GetRoadside(tile);
01365 
01366       /* We have our desired type, do nothing */
01367       if (cur_rs == new_rs[0]) return;
01368 
01369       /* We have the pre-type of the desired type, switch to the desired type */
01370       if (cur_rs == new_rs[1]) {
01371         cur_rs = new_rs[0];
01372       /* We have barren land, install the pre-type */
01373       } else if (cur_rs == ROADSIDE_BARREN) {
01374         cur_rs = new_rs[1];
01375       /* We're totally off limits, remove any installation and make barren land */
01376       } else {
01377         cur_rs = ROADSIDE_BARREN;
01378       }
01379       SetRoadside(tile, cur_rs);
01380       MarkTileDirtyByTile(tile);
01381     }
01382   } else if (IncreaseRoadWorksCounter(tile)) {
01383     TerminateRoadWorks(tile);
01384 
01385     if (_settings_game.economy.mod_road_rebuild) {
01386       /* Generate a nicer town surface */
01387       const RoadBits old_rb = GetAnyRoadBits(tile, ROADTYPE_ROAD);
01388       const RoadBits new_rb = CleanUpRoadBits(tile, old_rb);
01389 
01390       if (old_rb != new_rb) {
01391         RemoveRoad(tile, DC_EXEC | DC_AUTO | DC_NO_WATER, (old_rb ^ new_rb), ROADTYPE_ROAD, true);
01392       }
01393     }
01394 
01395     MarkTileDirtyByTile(tile);
01396   }
01397 }
01398 
01399 static bool ClickTile_Road(TileIndex tile)
01400 {
01401   if (!IsRoadDepot(tile)) return false;
01402 
01403   ShowDepotWindow(tile, VEH_ROAD);
01404   return true;
01405 }
01406 
01407 /* Converts RoadBits to TrackBits */
01408 static const byte _road_trackbits[16] = {
01409   0x0, 0x0, 0x0, 0x10, 0x0, 0x2, 0x8, 0x1A, 0x0, 0x4, 0x1, 0x15, 0x20, 0x26, 0x29, 0x3F,
01410 };
01411 
01412 static TrackStatus GetTileTrackStatus_Road(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
01413 {
01414   TrackdirBits trackdirbits = TRACKDIR_BIT_NONE;
01415   TrackdirBits red_signals = TRACKDIR_BIT_NONE; // crossing barred
01416   switch (mode) {
01417     case TRANSPORT_RAIL:
01418       if (IsLevelCrossing(tile)) trackdirbits = TrackBitsToTrackdirBits(GetCrossingRailBits(tile));
01419       break;
01420 
01421     case TRANSPORT_ROAD:
01422       if ((GetRoadTypes(tile) & sub_mode) == 0) break;
01423       switch (GetRoadTileType(tile)) {
01424         case ROAD_TILE_NORMAL: {
01425           const uint drd_to_multiplier[DRD_END] = { 0x101, 0x100, 0x1, 0x0 };
01426           RoadType rt = (RoadType)FindFirstBit(sub_mode);
01427           RoadBits bits = GetRoadBits(tile, rt);
01428 
01429           /* no roadbit at this side of tile, return 0 */
01430           if (side != INVALID_DIAGDIR && (DiagDirToRoadBits(side) & bits) == 0) break;
01431 
01432           uint multiplier = drd_to_multiplier[rt == ROADTYPE_TRAM ? DRD_NONE : GetDisallowedRoadDirections(tile)];
01433           if (!HasRoadWorks(tile)) trackdirbits = (TrackdirBits)(_road_trackbits[bits] * multiplier);
01434           break;
01435         }
01436 
01437         case ROAD_TILE_CROSSING: {
01438           Axis axis = GetCrossingRoadAxis(tile);
01439 
01440           if (side != INVALID_DIAGDIR && axis != DiagDirToAxis(side)) break;
01441 
01442           trackdirbits = TrackBitsToTrackdirBits(AxisToTrackBits(axis));
01443           if (IsCrossingBarred(tile)) red_signals = trackdirbits;
01444           break;
01445         }
01446 
01447         default:
01448         case ROAD_TILE_DEPOT: {
01449           DiagDirection dir = GetRoadDepotDirection(tile);
01450 
01451           if (side != INVALID_DIAGDIR && side != dir) break;
01452 
01453           trackdirbits = TrackBitsToTrackdirBits(DiagDirToDiagTrackBits(dir));
01454           break;
01455         }
01456       }
01457       break;
01458 
01459     default: break;
01460   }
01461   return CombineTrackStatus(trackdirbits, red_signals);
01462 }
01463 
01464 static const StringID _road_tile_strings[] = {
01465   STR_1814_ROAD,
01466   STR_1814_ROAD,
01467   STR_1814_ROAD,
01468   STR_1815_ROAD_WITH_STREETLIGHTS,
01469   STR_1814_ROAD,
01470   STR_1816_TREE_LINED_ROAD,
01471   STR_1814_ROAD,
01472   STR_1814_ROAD,
01473 };
01474 
01475 static void GetTileDesc_Road(TileIndex tile, TileDesc *td)
01476 {
01477   Owner rail_owner = INVALID_OWNER;
01478   Owner road_owner = INVALID_OWNER;
01479   Owner tram_owner = INVALID_OWNER;
01480 
01481   switch (GetRoadTileType(tile)) {
01482     case ROAD_TILE_CROSSING: {
01483       td->str = STR_1818_ROAD_RAIL_LEVEL_CROSSING;
01484       RoadTypes rts = GetRoadTypes(tile);
01485       rail_owner = GetTileOwner(tile);
01486       if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01487       if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01488       break;
01489     }
01490 
01491     case ROAD_TILE_DEPOT:
01492       td->str = STR_1817_ROAD_VEHICLE_DEPOT;
01493       road_owner = GetTileOwner(tile); // Tile has only one owner, roadtype does not matter
01494       break;
01495 
01496     default: {
01497       RoadTypes rts = GetRoadTypes(tile);
01498       td->str = (HasBit(rts, ROADTYPE_ROAD) ? _road_tile_strings[GetRoadside(tile)] : STR_TRAMWAY);
01499       if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01500       if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01501       break;
01502     }
01503   }
01504 
01505   /* Now we have to discover, if the tile has only one owner or many:
01506    *   - Find a first_owner of the tile. (Currently road or tram must be present, but this will break when the third type becomes available)
01507    *   - Compare the found owner with the other owners, and test if they differ.
01508    * Note: If road exists it will be the first_owner.
01509    */
01510   Owner first_owner = (road_owner == INVALID_OWNER ? tram_owner : road_owner);
01511   bool mixed_owners = (tram_owner != INVALID_OWNER && tram_owner != first_owner) || (rail_owner != INVALID_OWNER && rail_owner != first_owner);
01512 
01513   if (mixed_owners) {
01514     /* Multiple owners */
01515     td->owner_type[0] = (rail_owner == INVALID_OWNER ? STR_NULL : STR_RAIL_OWNER);
01516     td->owner[0] = rail_owner;
01517     td->owner_type[1] = (road_owner == INVALID_OWNER ? STR_NULL : STR_ROAD_OWNER);
01518     td->owner[1] = road_owner;
01519     td->owner_type[2] = (tram_owner == INVALID_OWNER ? STR_NULL : STR_TRAM_OWNER);
01520     td->owner[2] = tram_owner;
01521   } else {
01522     /* One to rule them all */
01523     td->owner[0] = first_owner;
01524   }
01525 }
01526 
01531 static const byte _roadveh_enter_depot_dir[4] = {
01532   TRACKDIR_X_SW, TRACKDIR_Y_NW, TRACKDIR_X_NE, TRACKDIR_Y_SE
01533 };
01534 
01535 static VehicleEnterTileStatus VehicleEnter_Road(Vehicle *v, TileIndex tile, int x, int y)
01536 {
01537   switch (GetRoadTileType(tile)) {
01538     case ROAD_TILE_CROSSING:
01539       if (v->type == VEH_TRAIN) {
01540         /* it should be barred */
01541         assert(IsCrossingBarred(tile));
01542       }
01543       break;
01544 
01545     case ROAD_TILE_DEPOT:
01546       if (v->type == VEH_ROAD &&
01547           v->u.road.frame == RVC_DEPOT_STOP_FRAME &&
01548           _roadveh_enter_depot_dir[GetRoadDepotDirection(tile)] == v->u.road.state) {
01549         v->u.road.state = RVSB_IN_DEPOT;
01550         v->vehstatus |= VS_HIDDEN;
01551         v->direction = ReverseDir(v->direction);
01552         if (v->Next() == NULL) VehicleEnterDepot(v);
01553         v->tile = tile;
01554 
01555         InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
01556         return VETSB_ENTERED_WORMHOLE;
01557       }
01558       break;
01559 
01560     default: break;
01561   }
01562   return VETSB_CONTINUE;
01563 }
01564 
01565 
01566 static void ChangeTileOwner_Road(TileIndex tile, Owner old_owner, Owner new_owner)
01567 {
01568   if (IsRoadDepot(tile)) {
01569     if (GetTileOwner(tile) == old_owner) {
01570       if (new_owner == INVALID_OWNER) {
01571         DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
01572       } else {
01573         SetTileOwner(tile, new_owner);
01574       }
01575     }
01576     return;
01577   }
01578 
01579   for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
01580     /* Update all roadtypes, no matter if they are present */
01581     if (GetRoadOwner(tile, rt) == old_owner) {
01582       SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
01583     }
01584   }
01585 
01586   if (IsLevelCrossing(tile)) {
01587     if (GetTileOwner(tile) == old_owner) {
01588       if (new_owner == INVALID_OWNER) {
01589         DoCommand(tile, 0, GetCrossingRailTrack(tile), DC_EXEC | DC_BANKRUPT, CMD_REMOVE_SINGLE_RAIL);
01590       } else {
01591         SetTileOwner(tile, new_owner);
01592       }
01593     }
01594   }
01595 }
01596 
01597 static CommandCost TerraformTile_Road(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
01598 {
01599   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
01600     switch (GetRoadTileType(tile)) {
01601       case ROAD_TILE_CROSSING:
01602         if (!IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new)) && HasBit(VALID_LEVEL_CROSSING_SLOPES, tileh_new)) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
01603         break;
01604 
01605       case ROAD_TILE_DEPOT:
01606         if (AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, GetRoadDepotDirection(tile))) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
01607         break;
01608 
01609       case ROAD_TILE_NORMAL: {
01610         RoadBits bits = GetAllRoadBits(tile);
01611         RoadBits bits_copy = bits;
01612         /* Check if the slope-road_bits combination is valid at all, i.e. it is safe to call GetRoadFoundation(). */
01613         if (!CmdFailed(CheckRoadSlope(tileh_new, &bits_copy, ROAD_NONE, ROAD_NONE))) {
01614           /* CheckRoadSlope() sometimes changes the road_bits, if it does not agree with them. */
01615           if (bits == bits_copy) {
01616             uint z_old;
01617             Slope tileh_old = GetTileSlope(tile, &z_old);
01618 
01619             /* Get the slope on top of the foundation */
01620             z_old += ApplyFoundationToSlope(GetRoadFoundation(tileh_old, bits), &tileh_old);
01621             z_new += ApplyFoundationToSlope(GetRoadFoundation(tileh_new, bits), &tileh_new);
01622 
01623             /* The surface slope must not be changed */
01624             if ((z_old == z_new) && (tileh_old == tileh_new)) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
01625           }
01626         }
01627         break;
01628       }
01629 
01630       default: NOT_REACHED();
01631     }
01632   }
01633 
01634   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
01635 }
01636 
01638 extern const TileTypeProcs _tile_type_road_procs = {
01639   DrawTile_Road,           // draw_tile_proc
01640   GetSlopeZ_Road,          // get_slope_z_proc
01641   ClearTile_Road,          // clear_tile_proc
01642   GetAcceptedCargo_Road,   // get_accepted_cargo_proc
01643   GetTileDesc_Road,        // get_tile_desc_proc
01644   GetTileTrackStatus_Road, // get_tile_track_status_proc
01645   ClickTile_Road,          // click_tile_proc
01646   NULL,                    // animate_tile_proc
01647   TileLoop_Road,           // tile_loop_clear
01648   ChangeTileOwner_Road,    // change_tile_owner_clear
01649   NULL,                    // get_produced_cargo_proc
01650   VehicleEnter_Road,       // vehicle_enter_tile_proc
01651   GetFoundation_Road,      // get_foundation_proc
01652   TerraformTile_Road,      // terraform_tile_proc
01653 };

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