road_cmd.cpp

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00001 /* $Id: road_cmd.cpp 18986 2010-02-02 21:25:01Z terkhen $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "cmd_helper.h"
00014 #include "road_internal.h"
00015 #include "landscape.h"
00016 #include "viewport_func.h"
00017 #include "command_func.h"
00018 #include "pathfinder/yapf/yapf_cache.h"
00019 #include "depot_base.h"
00020 #include "newgrf.h"
00021 #include "variables.h"
00022 #include "autoslope.h"
00023 #include "tunnelbridge_map.h"
00024 #include "window_func.h"
00025 #include "strings_func.h"
00026 #include "vehicle_func.h"
00027 #include "sound_func.h"
00028 #include "tunnelbridge.h"
00029 #include "cheat_type.h"
00030 #include "functions.h"
00031 #include "effectvehicle_func.h"
00032 #include "effectvehicle_base.h"
00033 #include "elrail_func.h"
00034 #include "roadveh.h"
00035 #include "town.h"
00036 #include "company_base.h"
00037 #include "core/random_func.hpp"
00038 
00039 #include "table/strings.h"
00040 
00045 bool RoadVehiclesAreBuilt()
00046 {
00047   const RoadVehicle *rv;
00048   FOR_ALL_ROADVEHICLES(rv) return true;
00049 
00050   return false;
00051 }
00052 
00053 #define M(x) (1 << (x))
00054 /* Level crossings may only be built on these slopes */
00055 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));
00056 #undef M
00057 
00058 /* Invalid RoadBits on slopes  */
00059 static const RoadBits _invalid_tileh_slopes_road[2][15] = {
00060   /* The inverse of the mixable RoadBits on a leveled slope */
00061   {
00062     ROAD_NONE,         // SLOPE_FLAT
00063     ROAD_NE | ROAD_SE, // SLOPE_W
00064     ROAD_NE | ROAD_NW, // SLOPE_S
00065 
00066     ROAD_NE,           // SLOPE_SW
00067     ROAD_NW | ROAD_SW, // SLOPE_E
00068     ROAD_NONE,         // SLOPE_EW
00069 
00070     ROAD_NW,           // SLOPE_SE
00071     ROAD_NONE,         // SLOPE_WSE
00072     ROAD_SE | ROAD_SW, // SLOPE_N
00073 
00074     ROAD_SE,           // SLOPE_NW
00075     ROAD_NONE,         // SLOPE_NS
00076     ROAD_NONE,         // SLOPE_ENW
00077 
00078     ROAD_SW,           // SLOPE_NE
00079     ROAD_NONE,         // SLOPE_SEN
00080     ROAD_NONE          // SLOPE_NWS
00081   },
00082   /* The inverse of the allowed straight roads on a slope
00083    * (with and without a foundation). */
00084   {
00085     ROAD_NONE, // SLOPE_FLAT
00086     ROAD_NONE, // SLOPE_W    Foundation
00087     ROAD_NONE, // SLOPE_S    Foundation
00088 
00089     ROAD_Y,    // SLOPE_SW
00090     ROAD_NONE, // SLOPE_E    Foundation
00091     ROAD_ALL,  // SLOPE_EW
00092 
00093     ROAD_X,    // SLOPE_SE
00094     ROAD_ALL,  // SLOPE_WSE
00095     ROAD_NONE, // SLOPE_N    Foundation
00096 
00097     ROAD_X,    // SLOPE_NW
00098     ROAD_ALL,  // SLOPE_NS
00099     ROAD_ALL,  // SLOPE_ENW
00100 
00101     ROAD_Y,    // SLOPE_NE
00102     ROAD_ALL,  // SLOPE_SEN
00103     ROAD_ALL   // SLOPE_NW
00104   }
00105 };
00106 
00107 static Foundation GetRoadFoundation(Slope tileh, RoadBits bits);
00108 
00119 bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, Owner owner, RoadType rt, DoCommandFlag flags, bool town_check)
00120 {
00121   if (_game_mode == GM_EDITOR || remove == ROAD_NONE) return true;
00122 
00123   /* Water can always flood and towns can always remove "normal" road pieces.
00124    * Towns are not be allowed to remove non "normal" road pieces, like tram
00125    * tracks as that would result in trams that cannot turn. */
00126   if (_current_company == OWNER_WATER ||
00127       (rt == ROADTYPE_ROAD && !Company::IsValidID(_current_company))) return true;
00128 
00129   /* Only do the special processing if the road is owned
00130    * by a town */
00131   if (owner != OWNER_TOWN) return (owner == OWNER_NONE) || CheckOwnership(owner);
00132 
00133   if (!town_check) return true;
00134 
00135   if (_cheats.magic_bulldozer.value) return true;
00136 
00137   Town *t = ClosestTownFromTile(tile, UINT_MAX);
00138   if (t == NULL) return true;
00139 
00140   /* check if you're allowed to remove the street owned by a town
00141    * removal allowance depends on difficulty setting */
00142   if (!CheckforTownRating(flags, t, ROAD_REMOVE)) return false;
00143 
00144   /* Get a bitmask of which neighbouring roads has a tile */
00145   RoadBits n = ROAD_NONE;
00146   RoadBits present = GetAnyRoadBits(tile, rt);
00147   if ((present & ROAD_NE) && (GetAnyRoadBits(TILE_ADDXY(tile, -1,  0), rt) & ROAD_SW)) n |= ROAD_NE;
00148   if ((present & ROAD_SE) && (GetAnyRoadBits(TILE_ADDXY(tile,  0,  1), rt) & ROAD_NW)) n |= ROAD_SE;
00149   if ((present & ROAD_SW) && (GetAnyRoadBits(TILE_ADDXY(tile,  1,  0), rt) & ROAD_NE)) n |= ROAD_SW;
00150   if ((present & ROAD_NW) && (GetAnyRoadBits(TILE_ADDXY(tile,  0, -1), rt) & ROAD_SE)) n |= ROAD_NW;
00151 
00152   int rating_decrease = RATING_ROAD_DOWN_STEP_EDGE;
00153   /* If 0 or 1 bits are set in n, or if no bits that match the bits to remove,
00154    * then allow it */
00155   if (KillFirstBit(n) != ROAD_NONE && (n & remove) != ROAD_NONE) {
00156     /* you can remove all kind of roads with extra dynamite */
00157     if (!_settings_game.construction.extra_dynamite) {
00158       SetDParam(0, t->index);
00159       _error_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_TO_ALLOW_THIS;
00160       return false;
00161     }
00162     rating_decrease = RATING_ROAD_DOWN_STEP_INNER;
00163   }
00164   ChangeTownRating(t, rating_decrease, RATING_ROAD_MINIMUM, flags);
00165 
00166   return true;
00167 }
00168 
00169 
00178 static CommandCost RemoveRoad(TileIndex tile, DoCommandFlag flags, RoadBits pieces, RoadType rt, bool crossing_check, bool town_check = true)
00179 {
00180   RoadTypes rts = GetRoadTypes(tile);
00181   /* The tile doesn't have the given road type */
00182   if (!HasBit(rts, rt)) return CMD_ERROR;
00183 
00184   switch (GetTileType(tile)) {
00185     case MP_ROAD:
00186       if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
00187       break;
00188 
00189     case MP_STATION:
00190       if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;
00191       if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
00192       break;
00193 
00194     case MP_TUNNELBRIDGE:
00195       if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) return CMD_ERROR;
00196       if (HasVehicleOnTunnelBridge(tile, GetOtherTunnelBridgeEnd(tile))) return CMD_ERROR;
00197       break;
00198 
00199     default:
00200       return CMD_ERROR;
00201   }
00202 
00203   if (!CheckAllowRemoveRoad(tile, pieces, GetRoadOwner(tile, rt), rt, flags, town_check)) return CMD_ERROR;
00204 
00205   if (!IsTileType(tile, MP_ROAD)) {
00206     /* If it's the last roadtype, just clear the whole tile */
00207     if (rts == RoadTypeToRoadTypes(rt)) return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00208 
00209     CommandCost cost(EXPENSES_CONSTRUCTION);
00210     if (IsTileType(tile, MP_TUNNELBRIDGE)) {
00211       TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
00212       /* Pay for *every* tile of the bridge or tunnel */
00213       cost.AddCost((GetTunnelBridgeLength(other_end, tile) + 2) * _price[PR_CLEAR_ROAD]);
00214       if (flags & DC_EXEC) {
00215         SetRoadTypes(other_end, GetRoadTypes(other_end) & ~RoadTypeToRoadTypes(rt));
00216         SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
00217 
00218         /* If the owner of the bridge sells all it's road, also move the ownership
00219          * to the owner of the other roadtype. */
00220         RoadType other_rt = (rt == ROADTYPE_ROAD) ? ROADTYPE_TRAM : ROADTYPE_ROAD;
00221         Owner other_owner = GetRoadOwner(tile, other_rt);
00222         if (other_owner != GetTileOwner(tile)) {
00223           SetTileOwner(tile, other_owner);
00224           SetTileOwner(other_end, other_owner);
00225         }
00226 
00227         /* Mark tiles diry that have been repaved */
00228         MarkTileDirtyByTile(tile);
00229         MarkTileDirtyByTile(other_end);
00230         if (IsBridge(tile)) {
00231           TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
00232 
00233           for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
00234         }
00235       }
00236     } else {
00237       assert(IsDriveThroughStopTile(tile));
00238       cost.AddCost(_price[PR_CLEAR_ROAD] * 2);
00239       if (flags & DC_EXEC) {
00240         SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
00241         MarkTileDirtyByTile(tile);
00242       }
00243     }
00244     return cost;
00245   }
00246 
00247   switch (GetRoadTileType(tile)) {
00248     case ROAD_TILE_NORMAL: {
00249       const Slope tileh = GetTileSlope(tile, NULL);
00250       RoadBits present = GetRoadBits(tile, rt);
00251       const RoadBits other = GetOtherRoadBits(tile, rt);
00252       const Foundation f = GetRoadFoundation(tileh, present);
00253 
00254       if (HasRoadWorks(tile) && _current_company != OWNER_WATER) return_cmd_error(STR_ERROR_ROAD_WORKS_IN_PROGRESS);
00255 
00256       /* Autocomplete to a straight road
00257        * @li on steep slopes
00258        * @li if the bits of the other roadtypes result in another foundation
00259        * @li if build on slopes is disabled */
00260       if (IsSteepSlope(tileh) || (IsStraightRoad(other) &&
00261           (other & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) != ROAD_NONE) ||
00262           (tileh != SLOPE_FLAT && !_settings_game.construction.build_on_slopes)) {
00263         pieces |= MirrorRoadBits(pieces);
00264       }
00265 
00266       /* limit the bits to delete to the existing bits. */
00267       pieces &= present;
00268       if (pieces == ROAD_NONE) return CMD_ERROR;
00269 
00270       /* Now set present what it will be after the remove */
00271       present ^= pieces;
00272 
00273       /* Check for invalid RoadBit combinations on slopes */
00274       if (tileh != SLOPE_FLAT && present != ROAD_NONE &&
00275           (present & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) == present) {
00276         return CMD_ERROR;
00277       }
00278 
00279       if (flags & DC_EXEC) {
00280         if (HasRoadWorks(tile)) {
00281           /* flooding tile with road works, don't forget to remove the effect vehicle too */
00282           assert(_current_company == OWNER_WATER);
00283           EffectVehicle *v;
00284           FOR_ALL_EFFECTVEHICLES(v) {
00285             if (TileVirtXY(v->x_pos, v->y_pos) == tile) {
00286               delete v;
00287             }
00288           }
00289         }
00290         if (present == ROAD_NONE) {
00291           RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
00292           if (rts == ROADTYPES_NONE) {
00293             /* Includes MarkTileDirtyByTile() */
00294             DoClearSquare(tile);
00295           } else {
00296             if (rt == ROADTYPE_ROAD && IsRoadOwner(tile, ROADTYPE_ROAD, OWNER_TOWN)) {
00297               /* Update nearest-town index */
00298               const Town *town = CalcClosestTownFromTile(tile);
00299               SetTownIndex(tile, town == NULL ? (TownID)INVALID_TOWN : town->index);
00300             }
00301             SetRoadBits(tile, ROAD_NONE, rt);
00302             SetRoadTypes(tile, rts);
00303             MarkTileDirtyByTile(tile);
00304           }
00305         } else {
00306           /* When bits are removed, you *always* end up with something that
00307            * is not a complete straight road tile. However, trams do not have
00308            * onewayness, so they cannot remove it either. */
00309           if (rt != ROADTYPE_TRAM) SetDisallowedRoadDirections(tile, DRD_NONE);
00310           SetRoadBits(tile, present, rt);
00311           MarkTileDirtyByTile(tile);
00312         }
00313       }
00314 
00315       /* If we change the foundation we have to pay for it. */
00316       return CommandCost(EXPENSES_CONSTRUCTION, CountBits(pieces) * _price[PR_CLEAR_ROAD] +
00317           ((GetRoadFoundation(tileh, present) != f) ? _price[PR_BUILD_FOUNDATION] : (Money)0));
00318     }
00319 
00320     case ROAD_TILE_CROSSING: {
00321       if (pieces & ComplementRoadBits(GetCrossingRoadBits(tile))) {
00322         return CMD_ERROR;
00323       }
00324 
00325       /* Don't allow road to be removed from the crossing when there is tram;
00326        * we can't draw the crossing without roadbits ;) */
00327       if (rt == ROADTYPE_ROAD && HasTileRoadType(tile, ROADTYPE_TRAM) && (flags & DC_EXEC || crossing_check)) return CMD_ERROR;
00328 
00329       if (flags & DC_EXEC) {
00330         Track railtrack = GetCrossingRailTrack(tile);
00331         RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
00332         if (rts == ROADTYPES_NONE) {
00333           TrackBits tracks = GetCrossingRailBits(tile);
00334           bool reserved = HasCrossingReservation(tile);
00335           MakeRailNormal(tile, GetTileOwner(tile), tracks, GetRailType(tile));
00336           if (reserved) SetTrackReservation(tile, tracks);
00337         } else {
00338           SetRoadTypes(tile, rts);
00339           /* If we ever get HWAY and it is possible without road then we will need to promote ownership and invalidate town index here, too */
00340         }
00341         MarkTileDirtyByTile(tile);
00342         YapfNotifyTrackLayoutChange(tile, railtrack);
00343       }
00344       return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_ROAD] * 2);
00345     }
00346 
00347     default:
00348     case ROAD_TILE_DEPOT:
00349       return CMD_ERROR;
00350   }
00351 }
00352 
00353 
00365 static CommandCost CheckRoadSlope(Slope tileh, RoadBits *pieces, RoadBits existing, RoadBits other)
00366 {
00367   /* Remove already build pieces */
00368   CLRBITS(*pieces, existing);
00369 
00370   /* If we can't build anything stop here */
00371   if (*pieces == ROAD_NONE) return CMD_ERROR;
00372 
00373   /* All RoadBit combos are valid on flat land */
00374   if (tileh == SLOPE_FLAT) return CommandCost();
00375 
00376   /* Proceed steep Slopes first to reduce lookup table size */
00377   if (IsSteepSlope(tileh)) {
00378     /* Force straight roads. */
00379     *pieces |= MirrorRoadBits(*pieces);
00380 
00381     /* Use existing as all existing since only straight
00382      * roads are allowed here. */
00383     existing |= other;
00384 
00385     if ((existing == ROAD_NONE || existing == *pieces) && IsStraightRoad(*pieces)) {
00386       return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00387     }
00388     return CMD_ERROR;
00389   }
00390 
00391   /* Save the merge of all bits of the current type */
00392   RoadBits type_bits = existing | *pieces;
00393 
00394   /* Roads on slopes */
00395   if (_settings_game.construction.build_on_slopes && (_invalid_tileh_slopes_road[0][tileh] & (other | type_bits)) == ROAD_NONE) {
00396 
00397     /* If we add leveling we've got to pay for it */
00398     if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00399 
00400     return CommandCost();
00401   }
00402 
00403   /* Autocomplete uphill roads */
00404   *pieces |= MirrorRoadBits(*pieces);
00405   type_bits = existing | *pieces;
00406 
00407   /* Uphill roads */
00408   if (IsStraightRoad(type_bits) && (other == type_bits || other == ROAD_NONE) &&
00409       (_invalid_tileh_slopes_road[1][tileh] & (other | type_bits)) == ROAD_NONE) {
00410 
00411     /* Slopes with foundation ? */
00412     if (IsSlopeWithOneCornerRaised(tileh)) {
00413 
00414       /* Prevent build on slopes if it isn't allowed */
00415       if (_settings_game.construction.build_on_slopes) {
00416 
00417         /* If we add foundation we've got to pay for it */
00418         if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00419 
00420         return CommandCost();
00421       }
00422     } else {
00423       if (CountBits(existing) == 1) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00424       return CommandCost();
00425     }
00426   }
00427   return CMD_ERROR;
00428 }
00429 
00440 CommandCost CmdBuildRoad(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00441 {
00442   CommandCost cost(EXPENSES_CONSTRUCTION);
00443 
00444   RoadBits existing = ROAD_NONE;
00445   RoadBits other_bits = ROAD_NONE;
00446 
00447   /* Road pieces are max 4 bitset values (NE, NW, SE, SW) and town can only be non-zero
00448    * if a non-company is building the road */
00449   if ((Company::IsValidID(_current_company) && p2 != 0) || (_current_company == OWNER_TOWN && !Town::IsValidID(p2))) return CMD_ERROR;
00450   if (_current_company != OWNER_TOWN) {
00451     const Town *town = CalcClosestTownFromTile(tile);
00452     p2 = (town != NULL) ? town->index : (TownID)INVALID_TOWN;
00453   }
00454 
00455   RoadBits pieces = Extract<RoadBits, 0>(p1);
00456 
00457   /* do not allow building 'zero' road bits, code wouldn't handle it */
00458   if (pieces == ROAD_NONE) return CMD_ERROR;
00459 
00460   RoadType rt = (RoadType)GB(p1, 4, 2);
00461   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
00462 
00463   DisallowedRoadDirections toggle_drd = (DisallowedRoadDirections)GB(p1, 6, 2);
00464 
00465   Slope tileh = GetTileSlope(tile, NULL);
00466 
00467   bool tile_cleared = false; // Used to remember that the tile was cleared during test run
00468   switch (GetTileType(tile)) {
00469     case MP_ROAD:
00470       switch (GetRoadTileType(tile)) {
00471         case ROAD_TILE_NORMAL: {
00472           if (HasRoadWorks(tile)) return_cmd_error(STR_ERROR_ROAD_WORKS_IN_PROGRESS);
00473 
00474           other_bits = GetOtherRoadBits(tile, rt);
00475           if (!HasTileRoadType(tile, rt)) break;
00476 
00477           existing = GetRoadBits(tile, rt);
00478           bool crossing = !IsStraightRoad(existing | pieces);
00479           if (rt != ROADTYPE_TRAM && (GetDisallowedRoadDirections(tile) != DRD_NONE || toggle_drd != DRD_NONE) && crossing) {
00480             /* Junctions cannot be one-way */
00481             return_cmd_error(STR_ERROR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
00482           }
00483           if ((existing & pieces) == pieces) {
00484             /* We only want to set the (dis)allowed road directions */
00485             if (toggle_drd != DRD_NONE && rt != ROADTYPE_TRAM) {
00486               if (crossing) return_cmd_error(STR_ERROR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
00487 
00488               Owner owner = GetRoadOwner(tile, ROADTYPE_ROAD);
00489               if (owner != OWNER_NONE && !CheckOwnership(owner, tile)) return CMD_ERROR;
00490 
00491               if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
00492 
00493               /* Ignore half built tiles */
00494               if ((flags & DC_EXEC) && rt != ROADTYPE_TRAM && IsStraightRoad(existing)) {
00495                 SetDisallowedRoadDirections(tile, GetDisallowedRoadDirections(tile) ^ toggle_drd);
00496                 MarkTileDirtyByTile(tile);
00497               }
00498               return CommandCost();
00499             }
00500             return_cmd_error(STR_ERROR_ALREADY_BUILT);
00501           }
00502         } break;
00503 
00504         case ROAD_TILE_CROSSING:
00505           other_bits = GetCrossingRoadBits(tile);
00506           if (pieces & ComplementRoadBits(other_bits)) goto do_clear;
00507           pieces = other_bits; // we need to pay for both roadbits
00508 
00509           if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
00510           break;
00511 
00512         case ROAD_TILE_DEPOT:
00513           if ((GetAnyRoadBits(tile, rt) & pieces) == pieces) return_cmd_error(STR_ERROR_ALREADY_BUILT);
00514           goto do_clear;
00515 
00516         default: NOT_REACHED();
00517       }
00518       break;
00519 
00520     case MP_RAILWAY: {
00521       if (IsSteepSlope(tileh)) {
00522         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
00523       }
00524 
00525       /* Level crossings may only be built on these slopes */
00526       if (!HasBit(VALID_LEVEL_CROSSING_SLOPES, tileh)) {
00527         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
00528       }
00529 
00530       if (GetRailTileType(tile) != RAIL_TILE_NORMAL) goto do_clear;
00531 
00532       Axis roaddir;
00533       switch (GetTrackBits(tile)) {
00534         case TRACK_BIT_X:
00535           if (pieces & ROAD_X) goto do_clear;
00536           roaddir = AXIS_Y;
00537           break;
00538 
00539         case TRACK_BIT_Y:
00540           if (pieces & ROAD_Y) goto do_clear;
00541           roaddir = AXIS_X;
00542           break;
00543 
00544         default: goto do_clear;
00545       }
00546 
00547       if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
00548 
00549       if (flags & DC_EXEC) {
00550         Track railtrack = AxisToTrack(OtherAxis(roaddir));
00551         YapfNotifyTrackLayoutChange(tile, railtrack);
00552         /* Always add road to the roadtypes (can't draw without it) */
00553         bool reserved = HasBit(GetRailReservationTrackBits(tile), railtrack);
00554         MakeRoadCrossing(tile, _current_company, _current_company, GetTileOwner(tile), roaddir, GetRailType(tile), RoadTypeToRoadTypes(rt) | ROADTYPES_ROAD, p2);
00555         SetCrossingReservation(tile, reserved);
00556         UpdateLevelCrossing(tile, false);
00557         MarkTileDirtyByTile(tile);
00558       }
00559       return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_ROAD] * (rt == ROADTYPE_ROAD ? 2 : 4));
00560     }
00561 
00562     case MP_STATION: {
00563       if ((GetAnyRoadBits(tile, rt) & pieces) == pieces) return_cmd_error(STR_ERROR_ALREADY_BUILT);
00564       if (!IsDriveThroughStopTile(tile)) goto do_clear;
00565 
00566       RoadBits curbits = AxisToRoadBits(DiagDirToAxis(GetRoadStopDir(tile)));
00567       if (pieces & ~curbits) goto do_clear;
00568       pieces = curbits; // we need to pay for both roadbits
00569 
00570       if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
00571     } break;
00572 
00573     case MP_TUNNELBRIDGE:
00574       if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) goto do_clear;
00575       if (MirrorRoadBits(DiagDirToRoadBits(GetTunnelBridgeDirection(tile))) != pieces) goto do_clear;
00576       if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
00577       /* Don't allow adding roadtype to the bridge/tunnel when vehicles are already driving on it */
00578       if (HasVehicleOnTunnelBridge(tile, GetOtherTunnelBridgeEnd(tile))) return CMD_ERROR;
00579       break;
00580 
00581     default: {
00582 do_clear:;
00583       CommandCost ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00584       if (ret.Failed()) return ret;
00585       cost.AddCost(ret);
00586       tile_cleared = true;
00587     } break;
00588   }
00589 
00590   if (other_bits != pieces) {
00591     /* Check the foundation/slopes when adding road/tram bits */
00592     CommandCost ret = CheckRoadSlope(tileh, &pieces, existing, other_bits);
00593     /* Return an error if we need to build a foundation (ret != 0) but the
00594      * current setting is turned off */
00595     if (ret.Failed() || (ret.GetCost() != 0 && !_settings_game.construction.build_on_slopes)) {
00596       return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
00597     }
00598     cost.AddCost(ret);
00599   }
00600 
00601   if (!tile_cleared && IsTileType(tile, MP_ROAD)) {
00602     /* Don't put the pieces that already exist */
00603     pieces &= ComplementRoadBits(existing);
00604 
00605     /* Check if new road bits will have the same foundation as other existing road types */
00606     if (IsNormalRoad(tile)) {
00607       Slope slope = GetTileSlope(tile, NULL);
00608       Foundation found_new = GetRoadFoundation(slope, pieces | existing);
00609 
00610       /* Test if all other roadtypes can be built at that foundation */
00611       for (RoadType rtest = ROADTYPE_ROAD; rtest < ROADTYPE_END; rtest++) {
00612         if (rtest != rt) { // check only other road types
00613           RoadBits bits = GetRoadBits(tile, rtest);
00614           /* do not check if there are not road bits of given type */
00615           if (bits != ROAD_NONE && GetRoadFoundation(slope, bits) != found_new) {
00616             return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
00617           }
00618         }
00619       }
00620     }
00621   }
00622 
00623   if (!tile_cleared && !EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
00624 
00625   cost.AddCost(CountBits(pieces) * _price[PR_BUILD_ROAD]);
00626   if (!tile_cleared && IsTileType(tile, MP_TUNNELBRIDGE)) {
00627     /* Pay for *every* tile of the bridge or tunnel */
00628     cost.MultiplyCost(GetTunnelBridgeLength(GetOtherTunnelBridgeEnd(tile), tile) + 2);
00629   }
00630 
00631   if (flags & DC_EXEC) {
00632     switch (GetTileType(tile)) {
00633       case MP_ROAD: {
00634         RoadTileType rtt = GetRoadTileType(tile);
00635         if (existing == ROAD_NONE || rtt == ROAD_TILE_CROSSING) {
00636           SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
00637           SetRoadOwner(tile, rt, _current_company);
00638           if (rt == ROADTYPE_ROAD) SetTownIndex(tile, p2);
00639         }
00640         if (rtt != ROAD_TILE_CROSSING) SetRoadBits(tile, existing | pieces, rt);
00641       } break;
00642 
00643       case MP_TUNNELBRIDGE: {
00644         TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
00645 
00646         SetRoadTypes(other_end, GetRoadTypes(other_end) | RoadTypeToRoadTypes(rt));
00647         SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
00648         SetRoadOwner(other_end, rt, _current_company);
00649         SetRoadOwner(tile, rt, _current_company);
00650 
00651         /* Mark tiles diry that have been repaved */
00652         MarkTileDirtyByTile(other_end);
00653         MarkTileDirtyByTile(tile);
00654         if (IsBridge(tile)) {
00655           TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
00656 
00657           for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
00658         }
00659       } break;
00660 
00661       case MP_STATION:
00662         assert(IsDriveThroughStopTile(tile));
00663         SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
00664         SetRoadOwner(tile, rt, _current_company);
00665         break;
00666 
00667       default:
00668         MakeRoadNormal(tile, pieces, RoadTypeToRoadTypes(rt), p2, _current_company, _current_company);
00669         break;
00670     }
00671 
00672     if (rt != ROADTYPE_TRAM && IsNormalRoadTile(tile)) {
00673       existing |= pieces;
00674       SetDisallowedRoadDirections(tile, IsStraightRoad(existing) ?
00675           GetDisallowedRoadDirections(tile) ^ toggle_drd : DRD_NONE);
00676     }
00677 
00678     MarkTileDirtyByTile(tile);
00679   }
00680   return cost;
00681 }
00682 
00697 CommandCost CmdBuildLongRoad(TileIndex start_tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00698 {
00699   CommandCost cost(EXPENSES_CONSTRUCTION);
00700   bool had_bridge = false;
00701   bool had_tunnel = false;
00702   bool had_success = false;
00703   DisallowedRoadDirections drd = DRD_NORTHBOUND;
00704 
00705   _error_message = INVALID_STRING_ID;
00706 
00707   if (p1 >= MapSize()) return CMD_ERROR;
00708 
00709   TileIndex end_tile = p1;
00710   RoadType rt = (RoadType)GB(p2, 3, 2);
00711   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
00712 
00713   Axis axis = Extract<Axis, 2>(p2);
00714   /* Only drag in X or Y direction dictated by the direction variable */
00715   if (axis == AXIS_X && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
00716   if (axis == AXIS_Y && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
00717 
00718   DiagDirection dir = AxisToDiagDir(axis);
00719 
00720   /* Swap direction, also the half-tile drag var (bit 0 and 1) */
00721   if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
00722     dir = ReverseDiagDir(dir);
00723     p2 ^= 3;
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 ((axis == AXIS_Y) == (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 first tile clicked by the user. */
00736   for (;;) {
00737     RoadBits bits = AxisToRoadBits(axis);
00738 
00739     /* Road parts only have to be built at the start tile or at the end tile. */
00740     if (tile == end_tile && !HasBit(p2, 1)) bits &= DiagDirToRoadBits(ReverseDiagDir(dir));
00741     if (tile == start_tile && HasBit(p2, 0)) bits &= DiagDirToRoadBits(dir);
00742 
00743     _error_message = INVALID_STRING_ID;
00744     CommandCost ret = DoCommand(tile, drd << 6 | rt << 4 | bits, 0, flags, CMD_BUILD_ROAD);
00745     if (ret.Failed()) {
00746       if (_error_message != STR_ERROR_ALREADY_BUILT) {
00747         if (HasBit(p2, 6)) return CMD_ERROR;
00748         break;
00749       }
00750     } else {
00751       had_success = true;
00752       /* Only pay for the upgrade on one side of the bridges and tunnels */
00753       if (IsTileType(tile, MP_TUNNELBRIDGE)) {
00754         if (IsBridge(tile)) {
00755           if ((!had_bridge || GetTunnelBridgeDirection(tile) == dir)) {
00756             cost.AddCost(ret);
00757           }
00758           had_bridge = true;
00759         } else { // IsTunnel(tile)
00760           if ((!had_tunnel || GetTunnelBridgeDirection(tile) == dir)) {
00761             cost.AddCost(ret);
00762           }
00763           had_tunnel = true;
00764         }
00765       } else {
00766         cost.AddCost(ret);
00767       }
00768     }
00769 
00770     if (tile == end_tile) break;
00771 
00772     tile += TileOffsByDiagDir(dir);
00773   }
00774 
00775   return !had_success ? CMD_ERROR : cost;
00776 }
00777 
00790 CommandCost CmdRemoveLongRoad(TileIndex end_tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00791 {
00792   CommandCost cost(EXPENSES_CONSTRUCTION);
00793 
00794   if (p1 >= MapSize()) return CMD_ERROR;
00795 
00796   TileIndex start_tile = p1;
00797   RoadType rt = (RoadType)GB(p2, 3, 2);
00798   if (!IsValidRoadType(rt)) return CMD_ERROR;
00799 
00800   Axis axis = Extract<Axis, 2>(p2);
00801   /* Only drag in X or Y direction dictated by the direction variable */
00802   if (axis == AXIS_X && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
00803   if (axis == AXIS_Y && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
00804 
00805   /* Swap start and ending tile, also the half-tile drag var (bit 0 and 1) */
00806   if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
00807     TileIndex t = start_tile;
00808     start_tile = end_tile;
00809     end_tile = t;
00810     p2 ^= IsInsideMM(p2 & 3, 1, 3) ? 3 : 0;
00811   }
00812 
00813   Money money = GetAvailableMoneyForCommand();
00814   TileIndex tile = start_tile;
00815   /* Start tile is the small number. */
00816   for (;;) {
00817     RoadBits bits = AxisToRoadBits(axis);
00818 
00819     if (tile == end_tile && !HasBit(p2, 1)) bits &= ROAD_NW | ROAD_NE;
00820     if (tile == start_tile && HasBit(p2, 0)) bits &= ROAD_SE | ROAD_SW;
00821 
00822     /* try to remove the halves. */
00823     if (bits != 0) {
00824       CommandCost ret = RemoveRoad(tile, flags & ~DC_EXEC, bits, rt, true);
00825       if (ret.Succeeded()) {
00826         if (flags & DC_EXEC) {
00827           money -= ret.GetCost();
00828           if (money < 0) {
00829             _additional_cash_required = DoCommand(end_tile, start_tile, p2, flags & ~DC_EXEC, CMD_REMOVE_LONG_ROAD).GetCost();
00830             return cost;
00831           }
00832           RemoveRoad(tile, flags, bits, rt, true, false);
00833         }
00834         cost.AddCost(ret);
00835       }
00836     }
00837 
00838     if (tile == end_tile) break;
00839 
00840     tile += (axis == AXIS_Y) ? TileDiffXY(0, 1) : TileDiffXY(1, 0);
00841   }
00842 
00843   return (cost.GetCost() == 0) ? CMD_ERROR : cost;
00844 }
00845 
00858 CommandCost CmdBuildRoadDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00859 {
00860   DiagDirection dir = Extract<DiagDirection, 0>(p1);
00861   RoadType rt = (RoadType)GB(p1, 2, 2);
00862 
00863   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
00864 
00865   Slope tileh = GetTileSlope(tile, NULL);
00866   if (tileh != SLOPE_FLAT && (
00867         !_settings_game.construction.build_on_slopes ||
00868         IsSteepSlope(tileh) ||
00869         !CanBuildDepotByTileh(dir, tileh)
00870       )) {
00871     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00872   }
00873 
00874   CommandCost cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00875   if (cost.Failed()) return CMD_ERROR;
00876 
00877   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00878 
00879   if (!Depot::CanAllocateItem()) return CMD_ERROR;
00880 
00881   if (flags & DC_EXEC) {
00882     Depot *dep = new Depot(tile);
00883     dep->town_index = ClosestTownFromTile(tile, UINT_MAX)->index;
00884 
00885     MakeRoadDepot(tile, _current_company, dep->index, dir, rt);
00886     MarkTileDirtyByTile(tile);
00887   }
00888   return cost.AddCost(_price[PR_BUILD_DEPOT_ROAD]);
00889 }
00890 
00891 static CommandCost RemoveRoadDepot(TileIndex tile, DoCommandFlag flags)
00892 {
00893   if (!CheckTileOwnership(tile) && _current_company != OWNER_WATER) return CMD_ERROR;
00894 
00895   if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
00896 
00897   if (flags & DC_EXEC) {
00898     delete Depot::GetByTile(tile);
00899     DoClearSquare(tile);
00900   }
00901 
00902   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_DEPOT_ROAD]);
00903 }
00904 
00905 static CommandCost ClearTile_Road(TileIndex tile, DoCommandFlag flags)
00906 {
00907   switch (GetRoadTileType(tile)) {
00908     case ROAD_TILE_NORMAL: {
00909       RoadBits b = GetAllRoadBits(tile);
00910 
00911       /* Clear the road if only one piece is on the tile OR we are not using the DC_AUTO flag */
00912       if ((CountBits(b) == 1 && GetRoadBits(tile, ROADTYPE_TRAM) == ROAD_NONE) || !(flags & DC_AUTO)) {
00913         RoadTypes rts = GetRoadTypes(tile);
00914         CommandCost ret(EXPENSES_CONSTRUCTION);
00915         for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
00916           if (HasBit(rts, rt)) {
00917             CommandCost tmp_ret = RemoveRoad(tile, flags, GetRoadBits(tile, rt), rt, true);
00918             if (tmp_ret.Failed()) return tmp_ret;
00919             ret.AddCost(tmp_ret);
00920           }
00921         }
00922         return ret;
00923       }
00924       return_cmd_error(STR_ERROR_MUST_REMOVE_ROAD_FIRST);
00925     }
00926 
00927     case ROAD_TILE_CROSSING: {
00928       RoadTypes rts = GetRoadTypes(tile);
00929       CommandCost ret(EXPENSES_CONSTRUCTION);
00930 
00931       if (flags & DC_AUTO) return_cmd_error(STR_ERROR_MUST_REMOVE_ROAD_FIRST);
00932 
00933       /* Must iterate over the roadtypes in a reverse manner because
00934        * tram tracks must be removed before the road bits. */
00935       RoadType rt = ROADTYPE_TRAM;
00936       do {
00937         if (HasBit(rts, rt)) {
00938           CommandCost tmp_ret = RemoveRoad(tile, flags, GetCrossingRoadBits(tile), rt, false);
00939           if (tmp_ret.Failed()) return tmp_ret;
00940           ret.AddCost(tmp_ret);
00941         }
00942       } while (rt-- != ROADTYPE_ROAD);
00943 
00944       if (flags & DC_EXEC) {
00945         DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00946       }
00947       return ret;
00948     }
00949 
00950     default:
00951     case ROAD_TILE_DEPOT:
00952       if (flags & DC_AUTO) {
00953         return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
00954       }
00955       return RemoveRoadDepot(tile, flags);
00956   }
00957 }
00958 
00959 
00960 struct DrawRoadTileStruct {
00961   uint16 image;
00962   byte subcoord_x;
00963   byte subcoord_y;
00964 };
00965 
00966 #include "table/road_land.h"
00967 
00975 static Foundation GetRoadFoundation(Slope tileh, RoadBits bits)
00976 {
00977   /* Flat land and land without a road doesn't require a foundation */
00978   if (tileh == SLOPE_FLAT || bits == ROAD_NONE) return FOUNDATION_NONE;
00979 
00980   if (!IsSteepSlope(tileh)) {
00981     /* Leveled RoadBits on a slope */
00982     if ((_invalid_tileh_slopes_road[0][tileh] & bits) == ROAD_NONE) return FOUNDATION_LEVELED;
00983 
00984     /* Straight roads without foundation on a slope */
00985     if (!IsSlopeWithOneCornerRaised(tileh) &&
00986         (_invalid_tileh_slopes_road[1][tileh] & bits) == ROAD_NONE)
00987       return FOUNDATION_NONE;
00988   }
00989 
00990   /* Roads on steep Slopes or on Slopes with one corner raised */
00991   return (bits == ROAD_X ? FOUNDATION_INCLINED_X : FOUNDATION_INCLINED_Y);
00992 }
00993 
00994 const byte _road_sloped_sprites[14] = {
00995   0,  0,  2,  0,
00996   0,  1,  0,  0,
00997   3,  0,  0,  0,
00998   0,  0
00999 };
01000 
01011 static bool AlwaysDrawUnpavedRoads(TileIndex tile, Roadside roadside)
01012 {
01013   return (IsOnSnow(tile) &&
01014       !(_settings_game.game_creation.landscape == LT_TROPIC && HasGrfMiscBit(GMB_DESERT_PAVED_ROADS) &&
01015         roadside != ROADSIDE_BARREN && roadside != ROADSIDE_GRASS && roadside != ROADSIDE_GRASS_ROAD_WORKS));
01016 }
01017 
01023 void DrawTramCatenary(const TileInfo *ti, RoadBits tram)
01024 {
01025   /* Do not draw catenary if it is invisible */
01026   if (IsInvisibilitySet(TO_CATENARY)) return;
01027 
01028   /* Don't draw the catenary under a low bridge */
01029   if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && !IsTransparencySet(TO_CATENARY)) {
01030     uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
01031 
01032     if (height <= GetTileMaxZ(ti->tile) + TILE_HEIGHT) return;
01033   }
01034 
01035   SpriteID front;
01036   SpriteID back;
01037 
01038   if (ti->tileh != SLOPE_FLAT) {
01039     back  = SPR_TRAMWAY_BACK_WIRES_SLOPED  + _road_sloped_sprites[ti->tileh - 1];
01040     front = SPR_TRAMWAY_FRONT_WIRES_SLOPED + _road_sloped_sprites[ti->tileh - 1];
01041   } else {
01042     back  = SPR_TRAMWAY_BASE + _road_backpole_sprites_1[tram];
01043     front = SPR_TRAMWAY_BASE + _road_frontwire_sprites_1[tram];
01044   }
01045 
01046   AddSortableSpriteToDraw(back,  PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
01047   AddSortableSpriteToDraw(front, PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
01048 }
01049 
01058 static void DrawRoadDetail(SpriteID img, const TileInfo *ti, int dx, int dy, int h)
01059 {
01060   int x = ti->x | dx;
01061   int y = ti->y | dy;
01062   byte z = ti->z;
01063   if (ti->tileh != SLOPE_FLAT) z = GetSlopeZ(x, y);
01064   AddSortableSpriteToDraw(img, PAL_NONE, x, y, 2, 2, h, z);
01065 }
01066 
01071 static void DrawRoadBits(TileInfo *ti)
01072 {
01073   RoadBits road = GetRoadBits(ti->tile, ROADTYPE_ROAD);
01074   RoadBits tram = GetRoadBits(ti->tile, ROADTYPE_TRAM);
01075 
01076   SpriteID image = 0;
01077   PaletteID pal = PAL_NONE;
01078 
01079   if (ti->tileh != SLOPE_FLAT) {
01080     DrawFoundation(ti, GetRoadFoundation(ti->tileh, road | tram));
01081 
01082     /* DrawFoundation() modifies ti.
01083      * Default sloped sprites.. */
01084     if (ti->tileh != SLOPE_FLAT) image = _road_sloped_sprites[ti->tileh - 1] + 0x53F;
01085   }
01086 
01087   if (image == 0) image = _road_tile_sprites_1[road != ROAD_NONE ? road : tram];
01088 
01089   Roadside roadside = GetRoadside(ti->tile);
01090 
01091   if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
01092     image += 19;
01093   } else {
01094     switch (roadside) {
01095       case ROADSIDE_BARREN:           pal = PALETTE_TO_BARE_LAND; break;
01096       case ROADSIDE_GRASS:            break;
01097       case ROADSIDE_GRASS_ROAD_WORKS: break;
01098       default:                        image -= 19; break; // Paved
01099     }
01100   }
01101 
01102   DrawGroundSprite(image, pal);
01103 
01104   /* For tram we overlay the road graphics with either tram tracks only
01105    * (when there is actual road beneath the trams) or with tram tracks
01106    * and some dirts which hides the road graphics */
01107   if (tram != ROAD_NONE) {
01108     if (ti->tileh != SLOPE_FLAT) {
01109       image = _road_sloped_sprites[ti->tileh - 1] + SPR_TRAMWAY_SLOPED_OFFSET;
01110     } else {
01111       image = _road_tile_sprites_1[tram] - SPR_ROAD_Y;
01112     }
01113     image += (road == ROAD_NONE) ? SPR_TRAMWAY_TRAM : SPR_TRAMWAY_OVERLAY;
01114     DrawGroundSprite(image, pal);
01115   }
01116 
01117   if (road != ROAD_NONE) {
01118     DisallowedRoadDirections drd = GetDisallowedRoadDirections(ti->tile);
01119     if (drd != DRD_NONE) {
01120       DrawGroundSpriteAt(SPR_ONEWAY_BASE + drd - 1 + ((road == ROAD_X) ? 0 : 3), PAL_NONE, 8, 8, GetPartialZ(8, 8, ti->tileh));
01121     }
01122   }
01123 
01124   if (HasRoadWorks(ti->tile)) {
01125     /* Road works */
01126     DrawGroundSprite((road | tram) & ROAD_X ? SPR_EXCAVATION_X : SPR_EXCAVATION_Y, PAL_NONE);
01127     return;
01128   }
01129 
01130   if (tram != ROAD_NONE) DrawTramCatenary(ti, tram);
01131 
01132   /* Return if full detail is disabled, or we are zoomed fully out. */
01133   if (!HasBit(_display_opt, DO_FULL_DETAIL) || _cur_dpi->zoom > ZOOM_LVL_DETAIL) return;
01134 
01135   /* Do not draw details (street lights, trees) under low bridge */
01136   if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && (roadside == ROADSIDE_TREES || roadside == ROADSIDE_STREET_LIGHTS)) {
01137     uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
01138     uint minz = GetTileMaxZ(ti->tile) + 2 * TILE_HEIGHT;
01139 
01140     if (roadside == ROADSIDE_TREES) minz += TILE_HEIGHT;
01141 
01142     if (height < minz) return;
01143   }
01144 
01145   /* If there are no road bits, return, as there is nothing left to do */
01146   if (CountBits(road) < 2) return;
01147 
01148   /* Draw extra details. */
01149   for (const DrawRoadTileStruct *drts = _road_display_table[roadside][road | tram]; drts->image != 0; drts++) {
01150     DrawRoadDetail(drts->image, ti, drts->subcoord_x, drts->subcoord_y, 0x10);
01151   }
01152 }
01153 
01155 static void DrawTile_Road(TileInfo *ti)
01156 {
01157   switch (GetRoadTileType(ti->tile)) {
01158     case ROAD_TILE_NORMAL:
01159       DrawRoadBits(ti);
01160       break;
01161 
01162     case ROAD_TILE_CROSSING: {
01163       if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
01164 
01165       SpriteID image = GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.crossing;
01166       PaletteID pal = PAL_NONE;
01167 
01168       if (GetCrossingRoadAxis(ti->tile) == AXIS_X) image++;
01169       if (IsCrossingBarred(ti->tile)) image += 2;
01170 
01171       Roadside roadside = GetRoadside(ti->tile);
01172 
01173       if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
01174         image += 8;
01175       } else {
01176         switch (roadside) {
01177           case ROADSIDE_BARREN: pal = PALETTE_TO_BARE_LAND; break;
01178           case ROADSIDE_GRASS:  break;
01179           default:              image += 4; break; // Paved
01180         }
01181       }
01182 
01183       DrawGroundSprite(image, pal);
01184 
01185       /* PBS debugging, draw reserved tracks darker */
01186       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasCrossingReservation(ti->tile)) {
01187         DrawGroundSprite(GetCrossingRoadAxis(ti->tile) == AXIS_Y ? GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_x : GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_y, PALETTE_CRASH);
01188       }
01189 
01190       if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
01191         DrawGroundSprite(SPR_TRAMWAY_OVERLAY + (GetCrossingRoadAxis(ti->tile) ^ 1), pal);
01192         DrawTramCatenary(ti, GetCrossingRoadBits(ti->tile));
01193       }
01194       if (HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
01195       break;
01196     }
01197 
01198     default:
01199     case ROAD_TILE_DEPOT: {
01200       if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
01201 
01202       PaletteID palette = COMPANY_SPRITE_COLOUR(GetTileOwner(ti->tile));
01203 
01204       const DrawTileSprites *dts;
01205       if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
01206         dts =  &_tram_depot[GetRoadDepotDirection(ti->tile)];
01207       } else {
01208         dts =  &_road_depot[GetRoadDepotDirection(ti->tile)];
01209       }
01210 
01211       DrawGroundSprite(dts->ground.sprite, PAL_NONE);
01212       DrawOrigTileSeq(ti, dts, TO_BUILDINGS, palette);
01213       break;
01214     }
01215   }
01216   DrawBridgeMiddle(ti);
01217 }
01218 
01219 void DrawRoadDepotSprite(int x, int y, DiagDirection dir, RoadType rt)
01220 {
01221   PaletteID palette = COMPANY_SPRITE_COLOUR(_local_company);
01222   const DrawTileSprites *dts = (rt == ROADTYPE_TRAM) ? &_tram_depot[dir] : &_road_depot[dir];
01223 
01224   x += 33;
01225   y += 17;
01226 
01227   DrawSprite(dts->ground.sprite, PAL_NONE, x, y);
01228   DrawOrigTileSeqInGUI(x, y, dts, palette);
01229 }
01230 
01236 void UpdateNearestTownForRoadTiles(bool invalidate)
01237 {
01238   assert(!invalidate || _generating_world);
01239 
01240   for (TileIndex t = 0; t < MapSize(); t++) {
01241     if (IsTileType(t, MP_ROAD) && !IsRoadDepot(t) && !HasTownOwnedRoad(t)) {
01242       TownID tid = (TownID)INVALID_TOWN;
01243       if (!invalidate) {
01244         const Town *town = CalcClosestTownFromTile(t);
01245         if (town != NULL) tid = town->index;
01246       }
01247       SetTownIndex(t, tid);
01248     }
01249   }
01250 }
01251 
01252 static uint GetSlopeZ_Road(TileIndex tile, uint x, uint y)
01253 {
01254   uint z;
01255   Slope tileh = GetTileSlope(tile, &z);
01256 
01257   if (tileh == SLOPE_FLAT) return z;
01258   if (IsNormalRoad(tile)) {
01259     Foundation f = GetRoadFoundation(tileh, GetAllRoadBits(tile));
01260     z += ApplyFoundationToSlope(f, &tileh);
01261     return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
01262   } else {
01263     return z + TILE_HEIGHT;
01264   }
01265 }
01266 
01267 static Foundation GetFoundation_Road(TileIndex tile, Slope tileh)
01268 {
01269   if (IsNormalRoad(tile)) {
01270     return GetRoadFoundation(tileh, GetAllRoadBits(tile));
01271   } else {
01272     return FlatteningFoundation(tileh);
01273   }
01274 }
01275 
01276 static const Roadside _town_road_types[][2] = {
01277   { ROADSIDE_GRASS,         ROADSIDE_GRASS },
01278   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
01279   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
01280   { ROADSIDE_TREES,         ROADSIDE_TREES },
01281   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
01282 };
01283 
01284 static const Roadside _town_road_types_2[][2] = {
01285   { ROADSIDE_GRASS,         ROADSIDE_GRASS },
01286   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
01287   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
01288   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
01289   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
01290 };
01291 
01292 
01293 static void TileLoop_Road(TileIndex tile)
01294 {
01295   switch (_settings_game.game_creation.landscape) {
01296     case LT_ARCTIC:
01297       if (IsOnSnow(tile) != (GetTileZ(tile) > GetSnowLine())) {
01298         ToggleSnow(tile);
01299         MarkTileDirtyByTile(tile);
01300       }
01301       break;
01302 
01303     case LT_TROPIC:
01304       if (GetTropicZone(tile) == TROPICZONE_DESERT && !IsOnDesert(tile)) {
01305         ToggleDesert(tile);
01306         MarkTileDirtyByTile(tile);
01307       }
01308       break;
01309   }
01310 
01311   if (IsRoadDepot(tile)) return;
01312 
01313   const Town *t = ClosestTownFromTile(tile, UINT_MAX);
01314   if (!HasRoadWorks(tile)) {
01315     HouseZonesBits grp = HZB_TOWN_EDGE;
01316 
01317     if (t != NULL) {
01318       grp = GetTownRadiusGroup(t, tile);
01319 
01320       /* Show an animation to indicate road work */
01321       if (t->road_build_months != 0 &&
01322           (DistanceManhattan(t->xy, tile) < 8 || grp != HZB_TOWN_EDGE) &&
01323           IsNormalRoad(tile) && CountBits(GetAllRoadBits(tile)) > 1 ) {
01324         if (GetFoundationSlope(tile, NULL) == SLOPE_FLAT && EnsureNoVehicleOnGround(tile) && Chance16(1, 40)) {
01325           StartRoadWorks(tile);
01326 
01327           SndPlayTileFx(SND_21_JACKHAMMER, tile);
01328           CreateEffectVehicleAbove(
01329             TileX(tile) * TILE_SIZE + 7,
01330             TileY(tile) * TILE_SIZE + 7,
01331             0,
01332             EV_BULLDOZER);
01333           MarkTileDirtyByTile(tile);
01334           return;
01335         }
01336       }
01337     }
01338 
01339     {
01340       /* Adjust road ground type depending on 'grp' (grp is the distance to the center) */
01341       const Roadside *new_rs = (_settings_game.game_creation.landscape == LT_TOYLAND) ? _town_road_types_2[grp] : _town_road_types[grp];
01342       Roadside cur_rs = GetRoadside(tile);
01343 
01344       /* We have our desired type, do nothing */
01345       if (cur_rs == new_rs[0]) return;
01346 
01347       /* We have the pre-type of the desired type, switch to the desired type */
01348       if (cur_rs == new_rs[1]) {
01349         cur_rs = new_rs[0];
01350       /* We have barren land, install the pre-type */
01351       } else if (cur_rs == ROADSIDE_BARREN) {
01352         cur_rs = new_rs[1];
01353       /* We're totally off limits, remove any installation and make barren land */
01354       } else {
01355         cur_rs = ROADSIDE_BARREN;
01356       }
01357       SetRoadside(tile, cur_rs);
01358       MarkTileDirtyByTile(tile);
01359     }
01360   } else if (IncreaseRoadWorksCounter(tile)) {
01361     TerminateRoadWorks(tile);
01362 
01363     if (_settings_game.economy.mod_road_rebuild) {
01364       /* Generate a nicer town surface */
01365       const RoadBits old_rb = GetAnyRoadBits(tile, ROADTYPE_ROAD);
01366       const RoadBits new_rb = CleanUpRoadBits(tile, old_rb);
01367 
01368       if (old_rb != new_rb) {
01369         RemoveRoad(tile, DC_EXEC | DC_AUTO | DC_NO_WATER, (old_rb ^ new_rb), ROADTYPE_ROAD, true);
01370       }
01371     }
01372 
01373     MarkTileDirtyByTile(tile);
01374   }
01375 }
01376 
01377 static bool ClickTile_Road(TileIndex tile)
01378 {
01379   if (!IsRoadDepot(tile)) return false;
01380 
01381   ShowDepotWindow(tile, VEH_ROAD);
01382   return true;
01383 }
01384 
01385 /* Converts RoadBits to TrackBits */
01386 static const byte _road_trackbits[16] = {
01387   0x0, 0x0, 0x0, 0x10, 0x0, 0x2, 0x8, 0x1A, 0x0, 0x4, 0x1, 0x15, 0x20, 0x26, 0x29, 0x3F,
01388 };
01389 
01390 static TrackStatus GetTileTrackStatus_Road(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
01391 {
01392   TrackdirBits trackdirbits = TRACKDIR_BIT_NONE;
01393   TrackdirBits red_signals = TRACKDIR_BIT_NONE; // crossing barred
01394   switch (mode) {
01395     case TRANSPORT_RAIL:
01396       if (IsLevelCrossing(tile)) trackdirbits = TrackBitsToTrackdirBits(GetCrossingRailBits(tile));
01397       break;
01398 
01399     case TRANSPORT_ROAD:
01400       if ((GetRoadTypes(tile) & sub_mode) == 0) break;
01401       switch (GetRoadTileType(tile)) {
01402         case ROAD_TILE_NORMAL: {
01403           const uint drd_to_multiplier[DRD_END] = { 0x101, 0x100, 0x1, 0x0 };
01404           RoadType rt = (RoadType)FindFirstBit(sub_mode);
01405           RoadBits bits = GetRoadBits(tile, rt);
01406 
01407           /* no roadbit at this side of tile, return 0 */
01408           if (side != INVALID_DIAGDIR && (DiagDirToRoadBits(side) & bits) == 0) break;
01409 
01410           uint multiplier = drd_to_multiplier[rt == ROADTYPE_TRAM ? DRD_NONE : GetDisallowedRoadDirections(tile)];
01411           if (!HasRoadWorks(tile)) trackdirbits = (TrackdirBits)(_road_trackbits[bits] * multiplier);
01412           break;
01413         }
01414 
01415         case ROAD_TILE_CROSSING: {
01416           Axis axis = GetCrossingRoadAxis(tile);
01417 
01418           if (side != INVALID_DIAGDIR && axis != DiagDirToAxis(side)) break;
01419 
01420           trackdirbits = TrackBitsToTrackdirBits(AxisToTrackBits(axis));
01421           if (IsCrossingBarred(tile)) red_signals = trackdirbits;
01422           break;
01423         }
01424 
01425         default:
01426         case ROAD_TILE_DEPOT: {
01427           DiagDirection dir = GetRoadDepotDirection(tile);
01428 
01429           if (side != INVALID_DIAGDIR && side != dir) break;
01430 
01431           trackdirbits = TrackBitsToTrackdirBits(DiagDirToDiagTrackBits(dir));
01432           break;
01433         }
01434       }
01435       break;
01436 
01437     default: break;
01438   }
01439   return CombineTrackStatus(trackdirbits, red_signals);
01440 }
01441 
01442 static const StringID _road_tile_strings[] = {
01443   STR_LAI_ROAD_DESCRIPTION_ROAD,
01444   STR_LAI_ROAD_DESCRIPTION_ROAD,
01445   STR_LAI_ROAD_DESCRIPTION_ROAD,
01446   STR_LAI_ROAD_DESCRIPTION_ROAD_WITH_STREETLIGHTS,
01447   STR_LAI_ROAD_DESCRIPTION_ROAD,
01448   STR_LAI_ROAD_DESCRIPTION_TREE_LINED_ROAD,
01449   STR_LAI_ROAD_DESCRIPTION_ROAD,
01450   STR_LAI_ROAD_DESCRIPTION_ROAD,
01451 };
01452 
01453 static void GetTileDesc_Road(TileIndex tile, TileDesc *td)
01454 {
01455   Owner rail_owner = INVALID_OWNER;
01456   Owner road_owner = INVALID_OWNER;
01457   Owner tram_owner = INVALID_OWNER;
01458 
01459   switch (GetRoadTileType(tile)) {
01460     case ROAD_TILE_CROSSING: {
01461       td->str = STR_LAI_ROAD_DESCRIPTION_ROAD_RAIL_LEVEL_CROSSING;
01462       RoadTypes rts = GetRoadTypes(tile);
01463       rail_owner = GetTileOwner(tile);
01464       if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01465       if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01466       break;
01467     }
01468 
01469     case ROAD_TILE_DEPOT:
01470       td->str = STR_LAI_ROAD_DESCRIPTION_ROAD_VEHICLE_DEPOT;
01471       road_owner = GetTileOwner(tile); // Tile has only one owner, roadtype does not matter
01472       break;
01473 
01474     default: {
01475       RoadTypes rts = GetRoadTypes(tile);
01476       td->str = (HasBit(rts, ROADTYPE_ROAD) ? _road_tile_strings[GetRoadside(tile)] : STR_LAI_ROAD_DESCRIPTION_TRAMWAY);
01477       if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01478       if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01479       break;
01480     }
01481   }
01482 
01483   /* Now we have to discover, if the tile has only one owner or many:
01484    *   - Find a first_owner of the tile. (Currently road or tram must be present, but this will break when the third type becomes available)
01485    *   - Compare the found owner with the other owners, and test if they differ.
01486    * Note: If road exists it will be the first_owner.
01487    */
01488   Owner first_owner = (road_owner == INVALID_OWNER ? tram_owner : road_owner);
01489   bool mixed_owners = (tram_owner != INVALID_OWNER && tram_owner != first_owner) || (rail_owner != INVALID_OWNER && rail_owner != first_owner);
01490 
01491   if (mixed_owners) {
01492     /* Multiple owners */
01493     td->owner_type[0] = (rail_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_RAIL_OWNER);
01494     td->owner[0] = rail_owner;
01495     td->owner_type[1] = (road_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_ROAD_OWNER);
01496     td->owner[1] = road_owner;
01497     td->owner_type[2] = (tram_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_TRAM_OWNER);
01498     td->owner[2] = tram_owner;
01499   } else {
01500     /* One to rule them all */
01501     td->owner[0] = first_owner;
01502   }
01503 }
01504 
01509 static const byte _roadveh_enter_depot_dir[4] = {
01510   TRACKDIR_X_SW, TRACKDIR_Y_NW, TRACKDIR_X_NE, TRACKDIR_Y_SE
01511 };
01512 
01513 static VehicleEnterTileStatus VehicleEnter_Road(Vehicle *v, TileIndex tile, int x, int y)
01514 {
01515   switch (GetRoadTileType(tile)) {
01516     case ROAD_TILE_DEPOT: {
01517       if (v->type != VEH_ROAD) break;
01518 
01519       RoadVehicle *rv = RoadVehicle::From(v);
01520       if (rv->frame == RVC_DEPOT_STOP_FRAME &&
01521           _roadveh_enter_depot_dir[GetRoadDepotDirection(tile)] == rv->state) {
01522         rv->state = RVSB_IN_DEPOT;
01523         rv->vehstatus |= VS_HIDDEN;
01524         rv->direction = ReverseDir(rv->direction);
01525         if (rv->Next() == NULL) VehicleEnterDepot(rv->First());
01526         rv->tile = tile;
01527 
01528         InvalidateWindowData(WC_VEHICLE_DEPOT, rv->tile);
01529         return VETSB_ENTERED_WORMHOLE;
01530       }
01531     } break;
01532 
01533     default: break;
01534   }
01535   return VETSB_CONTINUE;
01536 }
01537 
01538 
01539 static void ChangeTileOwner_Road(TileIndex tile, Owner old_owner, Owner new_owner)
01540 {
01541   if (IsRoadDepot(tile)) {
01542     if (GetTileOwner(tile) == old_owner) {
01543       if (new_owner == INVALID_OWNER) {
01544         DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
01545       } else {
01546         SetTileOwner(tile, new_owner);
01547       }
01548     }
01549     return;
01550   }
01551 
01552   for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
01553     /* Update all roadtypes, no matter if they are present */
01554     if (GetRoadOwner(tile, rt) == old_owner) {
01555       SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
01556     }
01557   }
01558 
01559   if (IsLevelCrossing(tile)) {
01560     if (GetTileOwner(tile) == old_owner) {
01561       if (new_owner == INVALID_OWNER) {
01562         DoCommand(tile, 0, GetCrossingRailTrack(tile), DC_EXEC | DC_BANKRUPT, CMD_REMOVE_SINGLE_RAIL);
01563       } else {
01564         SetTileOwner(tile, new_owner);
01565       }
01566     }
01567   }
01568 }
01569 
01570 static CommandCost TerraformTile_Road(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
01571 {
01572   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
01573     switch (GetRoadTileType(tile)) {
01574       case ROAD_TILE_CROSSING:
01575         if (!IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new)) && HasBit(VALID_LEVEL_CROSSING_SLOPES, tileh_new)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
01576         break;
01577 
01578       case ROAD_TILE_DEPOT:
01579         if (AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, GetRoadDepotDirection(tile))) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
01580         break;
01581 
01582       case ROAD_TILE_NORMAL: {
01583         RoadBits bits = GetAllRoadBits(tile);
01584         RoadBits bits_copy = bits;
01585         /* Check if the slope-road_bits combination is valid at all, i.e. it is safe to call GetRoadFoundation(). */
01586         if (CheckRoadSlope(tileh_new, &bits_copy, ROAD_NONE, ROAD_NONE).Succeeded()) {
01587           /* CheckRoadSlope() sometimes changes the road_bits, if it does not agree with them. */
01588           if (bits == bits_copy) {
01589             uint z_old;
01590             Slope tileh_old = GetTileSlope(tile, &z_old);
01591 
01592             /* Get the slope on top of the foundation */
01593             z_old += ApplyFoundationToSlope(GetRoadFoundation(tileh_old, bits), &tileh_old);
01594             z_new += ApplyFoundationToSlope(GetRoadFoundation(tileh_new, bits), &tileh_new);
01595 
01596             /* The surface slope must not be changed */
01597             if ((z_old == z_new) && (tileh_old == tileh_new)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
01598           }
01599         }
01600         break;
01601       }
01602 
01603       default: NOT_REACHED();
01604     }
01605   }
01606 
01607   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
01608 }
01609 
01611 extern const TileTypeProcs _tile_type_road_procs = {
01612   DrawTile_Road,           // draw_tile_proc
01613   GetSlopeZ_Road,          // get_slope_z_proc
01614   ClearTile_Road,          // clear_tile_proc
01615   NULL,                    // add_accepted_cargo_proc
01616   GetTileDesc_Road,        // get_tile_desc_proc
01617   GetTileTrackStatus_Road, // get_tile_track_status_proc
01618   ClickTile_Road,          // click_tile_proc
01619   NULL,                    // animate_tile_proc
01620   TileLoop_Road,           // tile_loop_clear
01621   ChangeTileOwner_Road,    // change_tile_owner_clear
01622   NULL,                    // add_produced_cargo_proc
01623   VehicleEnter_Road,       // vehicle_enter_tile_proc
01624   GetFoundation_Road,      // get_foundation_proc
01625   TerraformTile_Road,      // terraform_tile_proc
01626 };

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