# road_cmd.cpp

Go to the documentation of this file.

    00001 /* $Id$ */
    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 "openttd.h"
    00014 #include "cmd_helper.h"
    00015 #include "road_internal.h"
    00016 #include "landscape.h"
    00017 #include "viewport_func.h"
    00018 #include "command_func.h"
    00019 #include "pathfinder/yapf/yapf_cache.h"
    00020 #include "depot_base.h"
    00021 #include "newgrf.h"
    00022 #include "variables.h"
    00023 #include "autoslope.h"
    00024 #include "tunnelbridge_map.h"
    00025 #include "window_func.h"
    00026 #include "strings_func.h"
    00027 #include "vehicle_func.h"
    00028 #include "sound_func.h"
    00029 #include "tunnelbridge.h"
    00030 #include "cheat_type.h"
    00031 #include "functions.h"
    00032 #include "effectvehicle_func.h"
    00033 #include "elrail_func.h"
    00034 #include "roadveh.h"
    00035 #include "town.h"
    00036
    00037 #include "table/sprites.h"
    00038 #include "table/strings.h"
    00039
    00044 bool RoadVehiclesAreBuilt()
    00045 {
    00046   const RoadVehicle *rv;
    00047   FOR_ALL_ROADVEHICLES(rv) return true;
    00048
    00049   return false;
    00050 }
    00051
    00052 #define M(x) (1 << (x))
    00053 /* Level crossings may only be built on these slopes */
    00054 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));
    00055 #undef M
    00056
    00057 /* Invalid RoadBits on slopes  */
    00058 static const RoadBits _invalid_tileh_slopes_road[2][15] = {
    00059   /* The inverse of the mixable RoadBits on a leveled slope */
    00060   {
    00061     ROAD_NONE,         // SLOPE_FLAT
    00062     ROAD_NE | ROAD_SE, // SLOPE_W
    00063     ROAD_NE | ROAD_NW, // SLOPE_S
    00064
    00065     ROAD_NE,           // SLOPE_SW
    00066     ROAD_NW | ROAD_SW, // SLOPE_E
    00067     ROAD_NONE,         // SLOPE_EW
    00068
    00069     ROAD_NW,           // SLOPE_SE
    00070     ROAD_NONE,         // SLOPE_WSE
    00071     ROAD_SE | ROAD_SW, // SLOPE_N
    00072
    00073     ROAD_SE,           // SLOPE_NW
    00074     ROAD_NONE,         // SLOPE_NS
    00075     ROAD_NONE,         // SLOPE_ENW
    00076
    00077     ROAD_SW,           // SLOPE_NE
    00078     ROAD_NONE,         // SLOPE_SEN
    00079     ROAD_NONE          // SLOPE_NWS
    00080   },
    00081   /* The inverse of the allowed straight roads on a slope
    00082    * (with and without a foundation). */
    00083   {
    00084     ROAD_NONE, // SLOPE_FLAT
    00085     ROAD_NONE, // SLOPE_W    Foundation
    00086     ROAD_NONE, // SLOPE_S    Foundation
    00087
    00088     ROAD_Y,    // SLOPE_SW
    00089     ROAD_NONE, // SLOPE_E    Foundation
    00090     ROAD_ALL,  // SLOPE_EW
    00091
    00092     ROAD_X,    // SLOPE_SE
    00093     ROAD_ALL,  // SLOPE_WSE
    00094     ROAD_NONE, // SLOPE_N    Foundation
    00095
    00096     ROAD_X,    // SLOPE_NW
    00097     ROAD_ALL,  // SLOPE_NS
    00098     ROAD_ALL,  // SLOPE_ENW
    00099
    00100     ROAD_Y,    // SLOPE_NE
    00101     ROAD_ALL,  // SLOPE_SEN
    00102     ROAD_ALL   // SLOPE_NW
    00103   }
    00104 };
    00105
    00106 static Foundation GetRoadFoundation(Slope tileh, RoadBits bits);
    00107
    00118 bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, Owner owner, RoadType rt, DoCommandFlag flags, bool town_check)
    00119 {
    00120   if (_game_mode == GM_EDITOR || remove == ROAD_NONE) return true;
    00121
    00122   /* Water can always flood and towns can always remove "normal" road pieces.
    00123    * Towns are not be allowed to remove non "normal" road pieces, like tram
    00124    * tracks as that would result in trams that cannot turn. */
    00125   if (_current_company == OWNER_WATER ||
    00126       (rt == ROADTYPE_ROAD && !Company::IsValidID(_current_company))) return true;
    00127
    00128   /* Only do the special processing if the road is owned
    00129    * by a town */
    00130   if (owner != OWNER_TOWN) return (owner == OWNER_NONE) || CheckOwnership(owner);
    00131
    00132   if (!town_check) return true;
    00133
    00134   if (_cheats.magic_bulldozer.value) return true;
    00135
    00136   Town *t = ClosestTownFromTile(tile, UINT_MAX);
    00137   if (t == NULL) return true;
    00138
    00139   /* check if you're allowed to remove the street owned by a town
    00140    * removal allowance depends on difficulty setting */
    00141   if (!CheckforTownRating(flags, t, ROAD_REMOVE)) return false;
    00142
    00143   /* Get a bitmask of which neighbouring roads has a tile */
    00144   RoadBits n = ROAD_NONE;
    00145   RoadBits present = GetAnyRoadBits(tile, rt);
    00146   if ((present & ROAD_NE) && (GetAnyRoadBits(TILE_ADDXY(tile, -1,  0), rt) & ROAD_SW)) n |= ROAD_NE;
    00147   if ((present & ROAD_SE) && (GetAnyRoadBits(TILE_ADDXY(tile,  0,  1), rt) & ROAD_NW)) n |= ROAD_SE;
    00148   if ((present & ROAD_SW) && (GetAnyRoadBits(TILE_ADDXY(tile,  1,  0), rt) & ROAD_NE)) n |= ROAD_SW;
    00149   if ((present & ROAD_NW) && (GetAnyRoadBits(TILE_ADDXY(tile,  0, -1), rt) & ROAD_SE)) n |= ROAD_NW;
    00150
    00151   int rating_decrease = RATING_ROAD_DOWN_STEP_EDGE;
    00152   /* If 0 or 1 bits are set in n, or if no bits that match the bits to remove,
    00153    * then allow it */
    00154   if (KillFirstBit(n) != ROAD_NONE && (n & remove) != ROAD_NONE) {
    00155     /* you can remove all kind of roads with extra dynamite */
    00156     if (!_settings_game.construction.extra_dynamite) {
    00157       SetDParam(0, t->index);
    00158       _error_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_TO_ALLOW_THIS;
    00159       return false;
    00160     }
    00161     rating_decrease = RATING_ROAD_DOWN_STEP_INNER;
    00162   }
    00163   ChangeTownRating(t, rating_decrease, RATING_ROAD_MINIMUM, flags);
    00164
    00165   return true;
    00166 }
    00167
    00168
    00177 static CommandCost RemoveRoad(TileIndex tile, DoCommandFlag flags, RoadBits pieces, RoadType rt, bool crossing_check, bool town_check = true)
    00178 {
    00179   RoadTypes rts = GetRoadTypes(tile);
    00180   /* The tile doesn't have the given road type */
    00181   if (!HasBit(rts, rt)) return CMD_ERROR;
    00182
    00183   switch (GetTileType(tile)) {
    00184     case MP_ROAD:
    00185       if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
    00186       break;
    00187
    00188     case MP_STATION:
    00189       if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;
    00190       if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
    00191       break;
    00192
    00193     case MP_TUNNELBRIDGE:
    00194       if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) return CMD_ERROR;
    00195       if (HasVehicleOnTunnelBridge(tile, GetOtherTunnelBridgeEnd(tile))) return CMD_ERROR;
    00196       break;
    00197
    00198     default:
    00199       return CMD_ERROR;
    00200   }
    00201
    00202   if (!CheckAllowRemoveRoad(tile, pieces, GetRoadOwner(tile, rt), rt, flags, town_check)) return CMD_ERROR;
    00203
    00204   if (!IsTileType(tile, MP_ROAD)) {
    00205     /* If it's the last roadtype, just clear the whole tile */
    00206     if (rts == RoadTypeToRoadTypes(rt)) return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00207
    00208     CommandCost cost(EXPENSES_CONSTRUCTION);
    00209     if (IsTileType(tile, MP_TUNNELBRIDGE)) {
    00210       TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
    00211       /* Pay for *every* tile of the bridge or tunnel */
    00212       cost.AddCost((GetTunnelBridgeLength(other_end, tile) + 2) * _price[PR_CLEAR_ROAD]);
    00213       if (flags & DC_EXEC) {
    00214         SetRoadTypes(other_end, GetRoadTypes(other_end) & ~RoadTypeToRoadTypes(rt));
    00215         SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
    00216
    00217         /* If the owner of the bridge sells all it's road, also move the ownership
    00218          * to the owner of the other roadtype. */
    00219         RoadType other_rt = (rt == ROADTYPE_ROAD) ? ROADTYPE_TRAM : ROADTYPE_ROAD;
    00220         Owner other_owner = GetRoadOwner(tile, other_rt);
    00221         if (other_owner != GetTileOwner(tile)) {
    00222           SetTileOwner(tile, other_owner);
    00223           SetTileOwner(other_end, other_owner);
    00224         }
    00225
    00226         /* Mark tiles diry that have been repaved */
    00227         MarkTileDirtyByTile(tile);
    00228         MarkTileDirtyByTile(other_end);
    00229         if (IsBridge(tile)) {
    00230           TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
    00231
    00232           for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
    00233         }
    00234       }
    00235     } else {
    00236       assert(IsDriveThroughStopTile(tile));
    00237       cost.AddCost(_price[PR_CLEAR_ROAD] * 2);
    00238       if (flags & DC_EXEC) {
    00239         SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
    00240         MarkTileDirtyByTile(tile);
    00241       }
    00242     }
    00243     return cost;
    00244   }
    00245
    00246   switch (GetRoadTileType(tile)) {
    00247     case ROAD_TILE_NORMAL: {
    00248       const Slope tileh = GetTileSlope(tile, NULL);
    00249       RoadBits present = GetRoadBits(tile, rt);
    00250       const RoadBits other = GetOtherRoadBits(tile, rt);
    00251       const Foundation f = GetRoadFoundation(tileh, present);
    00252
    00253       if (HasRoadWorks(tile) && _current_company != OWNER_WATER) return_cmd_error(STR_ERROR_ROAD_WORKS_IN_PROGRESS);
    00254
    00255       /* Autocomplete to a straight road
    00256        * @li on steep slopes
    00257        * @li if the bits of the other roadtypes result in another foundation
    00258        * @li if build on slopes is disabled */
    00259       if (IsSteepSlope(tileh) || (IsStraightRoad(other) &&
    00260           (other & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) != ROAD_NONE) ||
    00261           (tileh != SLOPE_FLAT && !_settings_game.construction.build_on_slopes)) {
    00262         pieces |= MirrorRoadBits(pieces);
    00263       }
    00264
    00265       /* limit the bits to delete to the existing bits. */
    00266       pieces &= present;
    00267       if (pieces == ROAD_NONE) return CMD_ERROR;
    00268
    00269       /* Now set present what it will be after the remove */
    00270       present ^= pieces;
    00271
    00272       /* Check for invalid RoadBit combinations on slopes */
    00273       if (tileh != SLOPE_FLAT && present != ROAD_NONE &&
    00274           (present & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) == present) {
    00275         return CMD_ERROR;
    00276       }
    00277
    00278       if (flags & DC_EXEC) {
    00279         if (HasRoadWorks(tile)) {
    00280           /* flooding tile with road works, don't forget to remove the effect vehicle too */
    00281           assert(_current_company == OWNER_WATER);
    00282           EffectVehicle *v;
    00283           FOR_ALL_EFFECTVEHICLES(v) {
    00284             if (TileVirtXY(v->x_pos, v->y_pos) == tile) {
    00285               delete v;
    00286             }
    00287           }
    00288         }
    00289         if (present == ROAD_NONE) {
    00290           RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
    00291           if (rts == ROADTYPES_NONE) {
    00292             /* Includes MarkTileDirtyByTile() */
    00293             DoClearSquare(tile);
    00294           } else {
    00295             if (rt == ROADTYPE_ROAD && IsRoadOwner(tile, ROADTYPE_ROAD, OWNER_TOWN)) {
    00296               /* Update nearest-town index */
    00297               const Town *town = CalcClosestTownFromTile(tile);
    00298               SetTownIndex(tile, town == NULL ? (TownID)INVALID_TOWN : town->index);
    00299             }
    00300             SetRoadBits(tile, ROAD_NONE, rt);
    00301             SetRoadTypes(tile, rts);
    00302             MarkTileDirtyByTile(tile);
    00303           }
    00304         } else {
    00305           /* When bits are removed, you *always* end up with something that
    00306            * is not a complete straight road tile. However, trams do not have
    00307            * onewayness, so they cannot remove it either. */
    00308           if (rt != ROADTYPE_TRAM) SetDisallowedRoadDirections(tile, DRD_NONE);
    00309           SetRoadBits(tile, present, rt);
    00310           MarkTileDirtyByTile(tile);
    00311         }
    00312       }
    00313
    00314       /* If we change the foundation we have to pay for it. */
    00315       return CommandCost(EXPENSES_CONSTRUCTION, CountBits(pieces) * _price[PR_CLEAR_ROAD] +
    00316           ((GetRoadFoundation(tileh, present) != f) ? _price[PR_BUILD_FOUNDATION] : (Money)0));
    00317     }
    00318
    00319     case ROAD_TILE_CROSSING: {
    00320       if (pieces & ComplementRoadBits(GetCrossingRoadBits(tile))) {
    00321         return CMD_ERROR;
    00322       }
    00323
    00324       /* Don't allow road to be removed from the crossing when there is tram;
    00325        * we can't draw the crossing without roadbits ;) */
    00326       if (rt == ROADTYPE_ROAD && HasTileRoadType(tile, ROADTYPE_TRAM) && (flags & DC_EXEC || crossing_check)) return CMD_ERROR;
    00327
    00328       if (flags & DC_EXEC) {
    00329         Track railtrack = GetCrossingRailTrack(tile);
    00330         RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
    00331         if (rts == ROADTYPES_NONE) {
    00332           TrackBits tracks = GetCrossingRailBits(tile);
    00333           bool reserved = HasCrossingReservation(tile);
    00334           MakeRailNormal(tile, GetTileOwner(tile), tracks, GetRailType(tile));
    00335           if (reserved) SetTrackReservation(tile, tracks);
    00336         } else {
    00337           SetRoadTypes(tile, rts);
    00338           /* If we ever get HWAY and it is possible without road then we will need to promote ownership and invalidate town index here, too */
    00339         }
    00340         MarkTileDirtyByTile(tile);
    00341         YapfNotifyTrackLayoutChange(tile, railtrack);
    00342       }
    00343       return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_ROAD] * 2);
    00344     }
    00345
    00346     default:
    00347     case ROAD_TILE_DEPOT:
    00348       return CMD_ERROR;
    00349   }
    00350 }
    00351
    00352
    00362 CommandCost CmdRemoveRoad(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00363 {
    00364   RoadType rt = (RoadType)GB(p1, 4, 2);
    00365   if (!IsValidRoadType(rt)) return CMD_ERROR;
    00366
    00367   RoadBits pieces = Extract<RoadBits, 0>(p1);
    00368
    00369   return RemoveRoad(tile, flags, pieces, rt, true);
    00370 }
    00371
    00383 static CommandCost CheckRoadSlope(Slope tileh, RoadBits *pieces, RoadBits existing, RoadBits other)
    00384 {
    00385   /* Remove already build pieces */
    00386   CLRBITS(*pieces, existing);
    00387
    00388   /* If we can't build anything stop here */
    00389   if (*pieces == ROAD_NONE) return CMD_ERROR;
    00390
    00391   /* All RoadBit combos are valid on flat land */
    00392   if (tileh == SLOPE_FLAT) return CommandCost();
    00393
    00394   /* Proceed steep Slopes first to reduce lookup table size */
    00395   if (IsSteepSlope(tileh)) {
    00396     /* Force straight roads. */
    00397     *pieces |= MirrorRoadBits(*pieces);
    00398
    00399     /* Use existing as all existing since only straight
    00400      * roads are allowed here. */
    00401     existing |= other;
    00402
    00403     if ((existing == ROAD_NONE || existing == *pieces) && IsStraightRoad(*pieces)) {
    00404       return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00405     }
    00406     return CMD_ERROR;
    00407   }
    00408
    00409   /* Save the merge of all bits of the current type */
    00410   RoadBits type_bits = existing | *pieces;
    00411
    00412   /* Roads on slopes */
    00413   if (_settings_game.construction.build_on_slopes && (_invalid_tileh_slopes_road[0][tileh] & (other | type_bits)) == ROAD_NONE) {
    00414
    00415     /* If we add leveling we've got to pay for it */
    00416     if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00417
    00418     return CommandCost();
    00419   }
    00420
    00421   /* Autocomplete uphill roads */
    00422   *pieces |= MirrorRoadBits(*pieces);
    00423   type_bits = existing | *pieces;
    00424
    00425   /* Uphill roads */
    00426   if (IsStraightRoad(type_bits) && (other == type_bits || other == ROAD_NONE) &&
    00427       (_invalid_tileh_slopes_road[1][tileh] & (other | type_bits)) == ROAD_NONE) {
    00428
    00429     /* Slopes with foundation ? */
    00430     if (IsSlopeWithOneCornerRaised(tileh)) {
    00431
    00432       /* Prevent build on slopes if it isn't allowed */
    00433       if (_settings_game.construction.build_on_slopes) {
    00434
    00435         /* If we add foundation we've got to pay for it */
    00436         if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00437
    00438         return CommandCost();
    00439       }
    00440     } else {
    00441       if (CountBits(existing) == 1) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00442       return CommandCost();
    00443     }
    00444   }
    00445   return CMD_ERROR;
    00446 }
    00447
    00458 CommandCost CmdBuildRoad(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00459 {
    00460   CommandCost cost(EXPENSES_CONSTRUCTION);
    00461
    00462   RoadBits existing = ROAD_NONE;
    00463   RoadBits other_bits = ROAD_NONE;
    00464
    00465   /* Road pieces are max 4 bitset values (NE, NW, SE, SW) and town can only be non-zero
    00466    * if a non-company is building the road */
    00467   if ((Company::IsValidID(_current_company) && p2 != 0) || (_current_company == OWNER_TOWN && !Town::IsValidID(p2))) return CMD_ERROR;
    00468   if (_current_company != OWNER_TOWN) {
    00469     const Town *town = CalcClosestTownFromTile(tile);
    00470     p2 = (town != NULL) ? town->index : (TownID)INVALID_TOWN;
    00471   }
    00472
    00473   RoadBits pieces = Extract<RoadBits, 0>(p1);
    00474
    00475   /* do not allow building 'zero' road bits, code wouldn't handle it */
    00476   if (pieces == ROAD_NONE) return CMD_ERROR;
    00477
    00478   RoadType rt = (RoadType)GB(p1, 4, 2);
    00479   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
    00480
    00481   DisallowedRoadDirections toggle_drd = (DisallowedRoadDirections)GB(p1, 6, 2);
    00482
    00483   Slope tileh = GetTileSlope(tile, NULL);
    00484
    00485   switch (GetTileType(tile)) {
    00486     case MP_ROAD:
    00487       switch (GetRoadTileType(tile)) {
    00488         case ROAD_TILE_NORMAL: {
    00489           if (HasRoadWorks(tile)) return_cmd_error(STR_ERROR_ROAD_WORKS_IN_PROGRESS);
    00490
    00491           other_bits = GetOtherRoadBits(tile, rt);
    00492           if (!HasTileRoadType(tile, rt)) break;
    00493
    00494           existing = GetRoadBits(tile, rt);
    00495           bool crossing = !IsStraightRoad(existing | pieces);
    00496           if (rt != ROADTYPE_TRAM && (GetDisallowedRoadDirections(tile) != DRD_NONE || toggle_drd != DRD_NONE) && crossing) {
    00497             /* Junctions cannot be one-way */
    00498             return_cmd_error(STR_ERROR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
    00499           }
    00500           if ((existing & pieces) == pieces) {
    00501             /* We only want to set the (dis)allowed road directions */
    00502             if (toggle_drd != DRD_NONE && rt != ROADTYPE_TRAM) {
    00503               if (crossing) return_cmd_error(STR_ERROR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
    00504
    00505               Owner owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    00506               if (owner != OWNER_NONE && !CheckOwnership(owner)) return CMD_ERROR;
    00507
    00508               if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
    00509
    00510               /* Ignore half built tiles */
    00511               if ((flags & DC_EXEC) && rt != ROADTYPE_TRAM && IsStraightRoad(existing)) {
    00512                 SetDisallowedRoadDirections(tile, GetDisallowedRoadDirections(tile) ^ toggle_drd);
    00513                 MarkTileDirtyByTile(tile);
    00514               }
    00515               return CommandCost();
    00516             }
    00517             return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00518           }
    00519         } break;
    00520
    00521         case ROAD_TILE_CROSSING:
    00522           other_bits = GetCrossingRoadBits(tile);
    00523           if (pieces & ComplementRoadBits(other_bits)) goto do_clear;
    00524           pieces = other_bits; // we need to pay for both roadbits
    00525
    00526           if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00527           break;
    00528
    00529         case ROAD_TILE_DEPOT:
    00530           if ((GetAnyRoadBits(tile, rt) & pieces) == pieces) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00531           goto do_clear;
    00532
    00533         default: NOT_REACHED();
    00534       }
    00535       break;
    00536
    00537     case MP_RAILWAY: {
    00538       if (IsSteepSlope(tileh)) {
    00539         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00540       }
    00541
    00542       /* Level crossings may only be built on these slopes */
    00543       if (!HasBit(VALID_LEVEL_CROSSING_SLOPES, tileh)) {
    00544         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00545       }
    00546
    00547       if (GetRailTileType(tile) != RAIL_TILE_NORMAL) goto do_clear;
    00548
    00549       Axis roaddir;
    00550       switch (GetTrackBits(tile)) {
    00551         case TRACK_BIT_X:
    00552           if (pieces & ROAD_X) goto do_clear;
    00553           roaddir = AXIS_Y;
    00554           break;
    00555
    00556         case TRACK_BIT_Y:
    00557           if (pieces & ROAD_Y) goto do_clear;
    00558           roaddir = AXIS_X;
    00559           break;
    00560
    00561         default: goto do_clear;
    00562       }
    00563
    00564       if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
    00565
    00566       if (flags & DC_EXEC) {
    00567         Track railtrack = AxisToTrack(OtherAxis(roaddir));
    00568         YapfNotifyTrackLayoutChange(tile, railtrack);
    00569         /* Always add road to the roadtypes (can't draw without it) */
    00570         bool reserved = HasBit(GetRailReservationTrackBits(tile), railtrack);
    00571         MakeRoadCrossing(tile, _current_company, _current_company, GetTileOwner(tile), roaddir, GetRailType(tile), RoadTypeToRoadTypes(rt) | ROADTYPES_ROAD, p2);
    00572         SetCrossingReservation(tile, reserved);
    00573         UpdateLevelCrossing(tile, false);
    00574         MarkTileDirtyByTile(tile);
    00575       }
    00576       return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_ROAD] * (rt == ROADTYPE_ROAD ? 2 : 4));
    00577     }
    00578
    00579     case MP_STATION: {
    00580       if ((GetAnyRoadBits(tile, rt) & pieces) == pieces) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00581       if (!IsDriveThroughStopTile(tile)) goto do_clear;
    00582
    00583       RoadBits curbits = AxisToRoadBits(DiagDirToAxis(GetRoadStopDir(tile)));
    00584       if (pieces & ~curbits) goto do_clear;
    00585       pieces = curbits; // we need to pay for both roadbits
    00586
    00587       if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00588     } break;
    00589
    00590     case MP_TUNNELBRIDGE:
    00591       if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) goto do_clear;
    00592       if (MirrorRoadBits(DiagDirToRoadBits(GetTunnelBridgeDirection(tile))) != pieces) goto do_clear;
    00593       if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00594       /* Don't allow adding roadtype to the bridge/tunnel when vehicles are already driving on it */
    00595       if (HasVehicleOnTunnelBridge(tile, GetOtherTunnelBridgeEnd(tile))) return CMD_ERROR;
    00596       break;
    00597
    00598     default: {
    00599 do_clear:;
    00600       CommandCost ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00601       if (CmdFailed(ret)) return ret;
    00602       cost.AddCost(ret);
    00603     } break;
    00604   }
    00605
    00606   if (other_bits != pieces) {
    00607     /* Check the foundation/slopes when adding road/tram bits */
    00608     CommandCost ret = CheckRoadSlope(tileh, &pieces, existing, other_bits);
    00609     /* Return an error if we need to build a foundation (ret != 0) but the
    00610      * current setting is turned off */
    00611     if (CmdFailed(ret) || (ret.GetCost() != 0 && !_settings_game.construction.build_on_slopes)) {
    00612       return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00613     }
    00614     cost.AddCost(ret);
    00615   }
    00616
    00617   if (IsTileType(tile, MP_ROAD)) {
    00618     /* Don't put the pieces that already exist */
    00619     pieces &= ComplementRoadBits(existing);
    00620
    00621     /* Check if new road bits will have the same foundation as other existing road types */
    00622     if (IsNormalRoad(tile)) {
    00623       Slope slope = GetTileSlope(tile, NULL);
    00624       Foundation found_new = GetRoadFoundation(slope, pieces | existing);
    00625
    00626       /* Test if all other roadtypes can be built at that foundation */
    00627       for (RoadType rtest = ROADTYPE_ROAD; rtest < ROADTYPE_END; rtest++) {
    00628         if (rtest != rt) { // check only other road types
    00629           RoadBits bits = GetRoadBits(tile, rtest);
    00630           /* do not check if there are not road bits of given type */
    00631           if (bits != ROAD_NONE && GetRoadFoundation(slope, bits) != found_new) {
    00632             return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00633           }
    00634         }
    00635       }
    00636     }
    00637   }
    00638
    00639   if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
    00640
    00641   cost.AddCost(CountBits(pieces) * _price[PR_BUILD_ROAD]);
    00642   if (IsTileType(tile, MP_TUNNELBRIDGE)) {
    00643     /* Pay for *every* tile of the bridge or tunnel */
    00644     cost.MultiplyCost(GetTunnelBridgeLength(GetOtherTunnelBridgeEnd(tile), tile) + 2);
    00645   }
    00646
    00647   if (flags & DC_EXEC) {
    00648     switch (GetTileType(tile)) {
    00649       case MP_ROAD: {
    00650         RoadTileType rtt = GetRoadTileType(tile);
    00651         if (existing == ROAD_NONE || rtt == ROAD_TILE_CROSSING) {
    00652           SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
    00653           SetRoadOwner(tile, rt, _current_company);
    00654           if (rt == ROADTYPE_ROAD) SetTownIndex(tile, p2);
    00655         }
    00656         if (rtt != ROAD_TILE_CROSSING) SetRoadBits(tile, existing | pieces, rt);
    00657       } break;
    00658
    00659       case MP_TUNNELBRIDGE: {
    00660         TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
    00661
    00662         SetRoadTypes(other_end, GetRoadTypes(other_end) | RoadTypeToRoadTypes(rt));
    00663         SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
    00664         SetRoadOwner(other_end, rt, _current_company);
    00665         SetRoadOwner(tile, rt, _current_company);
    00666
    00667         /* Mark tiles diry that have been repaved */
    00668         MarkTileDirtyByTile(other_end);
    00669         MarkTileDirtyByTile(tile);
    00670         if (IsBridge(tile)) {
    00671           TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
    00672
    00673           for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
    00674         }
    00675       } break;
    00676
    00677       case MP_STATION:
    00678         assert(IsDriveThroughStopTile(tile));
    00679         SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
    00680         SetRoadOwner(tile, rt, _current_company);
    00681         break;
    00682
    00683       default:
    00684         MakeRoadNormal(tile, pieces, RoadTypeToRoadTypes(rt), p2, _current_company, _current_company);
    00685         break;
    00686     }
    00687
    00688     if (rt != ROADTYPE_TRAM && IsNormalRoadTile(tile)) {
    00689       existing |= pieces;
    00690       SetDisallowedRoadDirections(tile, IsStraightRoad(existing) ?
    00691           GetDisallowedRoadDirections(tile) ^ toggle_drd : DRD_NONE);
    00692     }
    00693
    00694     MarkTileDirtyByTile(tile);
    00695   }
    00696   return cost;
    00697 }
    00698
    00712 CommandCost CmdBuildLongRoad(TileIndex end_tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00713 {
    00714   CommandCost cost(EXPENSES_CONSTRUCTION);
    00715   bool had_bridge = false;
    00716   bool had_tunnel = false;
    00717   bool had_success = false;
    00718   DisallowedRoadDirections drd = DRD_NORTHBOUND;
    00719
    00720   _error_message = INVALID_STRING_ID;
    00721
    00722   if (p1 >= MapSize()) return CMD_ERROR;
    00723
    00724   TileIndex start_tile = p1;
    00725   RoadType rt = (RoadType)GB(p2, 3, 2);
    00726   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
    00727
    00728   /* Only drag in X or Y direction dictated by the direction variable */
    00729   if (!HasBit(p2, 2) && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
    00730   if (HasBit(p2, 2)  && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
    00731
    00732   /* Swap start and ending tile, also the half-tile drag var (bit 0 and 1) */
    00733   if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
    00734     TileIndex t = start_tile;
    00735     start_tile = end_tile;
    00736     end_tile = t;
    00737     p2 ^= IsInsideMM(p2 & 3, 1, 3) ? 3 : 0;
    00738     drd = DRD_SOUTHBOUND;
    00739   }
    00740
    00741   /* On the X-axis, we have to swap the initial bits, so they
    00742    * will be interpreted correctly in the GTTS. Futhermore
    00743    * when you just 'click' on one tile to build them. */
    00744   if (HasBit(p2, 2) == (start_tile == end_tile && HasBit(p2, 0) == HasBit(p2, 1))) drd ^= DRD_BOTH;
    00745   /* No disallowed direction bits have to be toggled */
    00746   if (!HasBit(p2, 5)) drd = DRD_NONE;
    00747
    00748   TileIndex tile = start_tile;
    00749   /* Start tile is the small number. */
    00750   for (;;) {
    00751     RoadBits bits = HasBit(p2, 2) ? ROAD_Y : ROAD_X;
    00752
    00753     if (tile == end_tile && !HasBit(p2, 1)) bits &= ROAD_NW | ROAD_NE;
    00754     if (tile == start_tile && HasBit(p2, 0)) bits &= ROAD_SE | ROAD_SW;
    00755
    00756     _error_message = INVALID_STRING_ID;
    00757     CommandCost ret = DoCommand(tile, drd << 6 | rt << 4 | bits, 0, flags, CMD_BUILD_ROAD);
    00758     if (CmdFailed(ret)) {
    00759       if (_error_message != STR_ERROR_ALREADY_BUILT) return CMD_ERROR;
    00760     } else {
    00761       had_success = true;
    00762       /* Only pay for the upgrade on one side of the bridges and tunnels */
    00763       if (IsTileType(tile, MP_TUNNELBRIDGE)) {
    00764         if (IsBridge(tile)) {
    00765           if ((!had_bridge || GetTunnelBridgeDirection(tile) == DIAGDIR_SE || GetTunnelBridgeDirection(tile) == DIAGDIR_SW)) {
    00766             cost.AddCost(ret);
    00767           }
    00768           had_bridge = true;
    00769         } else { // IsTunnel(tile)
    00770           if ((!had_tunnel || GetTunnelBridgeDirection(tile) == DIAGDIR_SE || GetTunnelBridgeDirection(tile) == DIAGDIR_SW)) {
    00771             cost.AddCost(ret);
    00772           }
    00773           had_tunnel = true;
    00774         }
    00775       } else {
    00776         cost.AddCost(ret);
    00777       }
    00778     }
    00779
    00780     if (tile == end_tile) break;
    00781
    00782     tile += HasBit(p2, 2) ? TileDiffXY(0, 1) : TileDiffXY(1, 0);
    00783   }
    00784
    00785   return !had_success ? CMD_ERROR : cost;
    00786 }
    00787
    00800 CommandCost CmdRemoveLongRoad(TileIndex end_tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00801 {
    00802   CommandCost cost(EXPENSES_CONSTRUCTION);
    00803
    00804   if (p1 >= MapSize()) return CMD_ERROR;
    00805
    00806   TileIndex start_tile = p1;
    00807   RoadType rt = (RoadType)GB(p2, 3, 2);
    00808   if (!IsValidRoadType(rt)) return CMD_ERROR;
    00809
    00810   /* Only drag in X or Y direction dictated by the direction variable */
    00811   if (!HasBit(p2, 2) && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
    00812   if (HasBit(p2, 2)  && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
    00813
    00814   /* Swap start and ending tile, also the half-tile drag var (bit 0 and 1) */
    00815   if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
    00816     TileIndex t = start_tile;
    00817     start_tile = end_tile;
    00818     end_tile = t;
    00819     p2 ^= IsInsideMM(p2 & 3, 1, 3) ? 3 : 0;
    00820   }
    00821
    00822   Money money = GetAvailableMoneyForCommand();
    00823   TileIndex tile = start_tile;
    00824   /* Start tile is the small number. */
    00825   for (;;) {
    00826     RoadBits bits = HasBit(p2, 2) ? ROAD_Y : ROAD_X;
    00827
    00828     if (tile == end_tile && !HasBit(p2, 1)) bits &= ROAD_NW | ROAD_NE;
    00829     if (tile == start_tile && HasBit(p2, 0)) bits &= ROAD_SE | ROAD_SW;
    00830
    00831     /* try to remove the halves. */
    00832     if (bits != 0) {
    00833       CommandCost ret = RemoveRoad(tile, flags & ~DC_EXEC, bits, rt, true);
    00834       if (CmdSucceeded(ret)) {
    00835         if (flags & DC_EXEC) {
    00836           money -= ret.GetCost();
    00837           if (money < 0) {
    00838             _additional_cash_required = DoCommand(end_tile, start_tile, p2, flags & ~DC_EXEC, CMD_REMOVE_LONG_ROAD).GetCost();
    00839             return cost;
    00840           }
    00841           RemoveRoad(tile, flags, bits, rt, true, false);
    00842         }
    00843         cost.AddCost(ret);
    00844       }
    00845     }
    00846
    00847     if (tile == end_tile) break;
    00848
    00849     tile += HasBit(p2, 2) ? TileDiffXY(0, 1) : TileDiffXY(1, 0);
    00850   }
    00851
    00852   return (cost.GetCost() == 0) ? CMD_ERROR : cost;
    00853 }
    00854
    00867 CommandCost CmdBuildRoadDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00868 {
    00869   DiagDirection dir = Extract<DiagDirection, 0>(p1);
    00870   RoadType rt = (RoadType)GB(p1, 2, 2);
    00871
    00872   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
    00873
    00874   Slope tileh = GetTileSlope(tile, NULL);
    00875   if (tileh != SLOPE_FLAT && (
    00876         !_settings_game.construction.build_on_slopes ||
    00877         IsSteepSlope(tileh) ||
    00878         !CanBuildDepotByTileh(dir, tileh)
    00879       )) {
    00880     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00881   }
    00882
    00883   CommandCost cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00884   if (CmdFailed(cost)) return CMD_ERROR;
    00885
    00886   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    00887
    00888   if (!Depot::CanAllocateItem()) return CMD_ERROR;
    00889
    00890   if (flags & DC_EXEC) {
    00891     Depot *dep = new Depot(tile);
    00892     dep->town_index = ClosestTownFromTile(tile, UINT_MAX)->index;
    00893
    00894     MakeRoadDepot(tile, _current_company, dep->index, dir, rt);
    00895     MarkTileDirtyByTile(tile);
    00896   }
    00897   return cost.AddCost(_price[PR_BUILD_DEPOT_ROAD]);
    00898 }
    00899
    00900 static CommandCost RemoveRoadDepot(TileIndex tile, DoCommandFlag flags)
    00901 {
    00902   if (!CheckTileOwnership(tile) && _current_company != OWNER_WATER) return CMD_ERROR;
    00903
    00904   if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
    00905
    00906   if (flags & DC_EXEC) {
    00907     delete Depot::GetByTile(tile);
    00908     DoClearSquare(tile);
    00909   }
    00910
    00911   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_DEPOT_ROAD]);
    00912 }
    00913
    00914 static CommandCost ClearTile_Road(TileIndex tile, DoCommandFlag flags)
    00915 {
    00916   switch (GetRoadTileType(tile)) {
    00917     case ROAD_TILE_NORMAL: {
    00918       RoadBits b = GetAllRoadBits(tile);
    00919
    00920       /* Clear the road if only one piece is on the tile OR we are not using the DC_AUTO flag */
    00921       if ((CountBits(b) == 1 && GetRoadBits(tile, ROADTYPE_TRAM) == ROAD_NONE) || !(flags & DC_AUTO)) {
    00922         RoadTypes rts = GetRoadTypes(tile);
    00923         CommandCost ret(EXPENSES_CONSTRUCTION);
    00924         for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
    00925           if (HasBit(rts, rt)) {
    00926             CommandCost tmp_ret = RemoveRoad(tile, flags, GetRoadBits(tile, rt), rt, true);
    00927             if (CmdFailed(tmp_ret)) return tmp_ret;
    00928             ret.AddCost(tmp_ret);
    00929           }
    00930         }
    00931         return ret;
    00932       }
    00933       return_cmd_error(STR_ERROR_MUST_REMOVE_ROAD_FIRST);
    00934     }
    00935
    00936     case ROAD_TILE_CROSSING: {
    00937       RoadTypes rts = GetRoadTypes(tile);
    00938       CommandCost ret(EXPENSES_CONSTRUCTION);
    00939
    00940       if (flags & DC_AUTO) return_cmd_error(STR_ERROR_MUST_REMOVE_ROAD_FIRST);
    00941
    00942       /* Must iterate over the roadtypes in a reverse manner because
    00943        * tram tracks must be removed before the road bits. */
    00944       RoadType rt = ROADTYPE_TRAM;
    00945       do {
    00946         if (HasBit(rts, rt)) {
    00947           CommandCost tmp_ret = RemoveRoad(tile, flags, GetCrossingRoadBits(tile), rt, false);
    00948           if (CmdFailed(tmp_ret)) return tmp_ret;
    00949           ret.AddCost(tmp_ret);
    00950         }
    00951       } while (rt-- != ROADTYPE_ROAD);
    00952
    00953       if (flags & DC_EXEC) {
    00954         DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00955       }
    00956       return ret;
    00957     }
    00958
    00959     default:
    00960     case ROAD_TILE_DEPOT:
    00961       if (flags & DC_AUTO) {
    00962         return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
    00963       }
    00964       return RemoveRoadDepot(tile, flags);
    00965   }
    00966 }
    00967
    00968
    00969 struct DrawRoadTileStruct {
    00970   uint16 image;
    00971   byte subcoord_x;
    00972   byte subcoord_y;
    00973 };
    00974
    00975 #include "table/road_land.h"
    00976
    00984 static Foundation GetRoadFoundation(Slope tileh, RoadBits bits)
    00985 {
    00986   /* Flat land and land without a road doesn't require a foundation */
    00987   if (tileh == SLOPE_FLAT || bits == ROAD_NONE) return FOUNDATION_NONE;
    00988
    00989   if (!IsSteepSlope(tileh)) {
    00990     /* Leveled RoadBits on a slope */
    00991     if ((_invalid_tileh_slopes_road[0][tileh] & bits) == ROAD_NONE) return FOUNDATION_LEVELED;
    00992
    00993     /* Straight roads without foundation on a slope */
    00994     if (!IsSlopeWithOneCornerRaised(tileh) &&
    00995         (_invalid_tileh_slopes_road[1][tileh] & bits) == ROAD_NONE)
    00996       return FOUNDATION_NONE;
    00997   }
    00998
    00999   /* Roads on steep Slopes or on Slopes with one corner raised */
    01000   return (bits == ROAD_X ? FOUNDATION_INCLINED_X : FOUNDATION_INCLINED_Y);
    01001 }
    01002
    01003 const byte _road_sloped_sprites[14] = {
    01004   0,  0,  2,  0,
    01005   0,  1,  0,  0,
    01006   3,  0,  0,  0,
    01007   0,  0
    01008 };
    01009
    01020 static bool AlwaysDrawUnpavedRoads(TileIndex tile, Roadside roadside)
    01021 {
    01022   return (IsOnSnow(tile) &&
    01023       !(_settings_game.game_creation.landscape == LT_TROPIC && HasGrfMiscBit(GMB_DESERT_PAVED_ROADS) &&
    01024         roadside != ROADSIDE_BARREN && roadside != ROADSIDE_GRASS && roadside != ROADSIDE_GRASS_ROAD_WORKS));
    01025 }
    01026
    01032 void DrawTramCatenary(const TileInfo *ti, RoadBits tram)
    01033 {
    01034   /* Do not draw catenary if it is invisible */
    01035   if (IsInvisibilitySet(TO_CATENARY)) return;
    01036
    01037   /* Don't draw the catenary under a low bridge */
    01038   if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && !IsTransparencySet(TO_CATENARY)) {
    01039     uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
    01040
    01041     if (height <= GetTileMaxZ(ti->tile) + TILE_HEIGHT) return;
    01042   }
    01043
    01044   SpriteID front;
    01045   SpriteID back;
    01046
    01047   if (ti->tileh != SLOPE_FLAT) {
    01048     back  = SPR_TRAMWAY_BACK_WIRES_SLOPED  + _road_sloped_sprites[ti->tileh - 1];
    01049     front = SPR_TRAMWAY_FRONT_WIRES_SLOPED + _road_sloped_sprites[ti->tileh - 1];
    01050   } else {
    01051     back  = SPR_TRAMWAY_BASE + _road_backpole_sprites_1[tram];
    01052     front = SPR_TRAMWAY_BASE + _road_frontwire_sprites_1[tram];
    01053   }
    01054
    01055   AddSortableSpriteToDraw(back,  PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
    01056   AddSortableSpriteToDraw(front, PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
    01057 }
    01058
    01067 static void DrawRoadDetail(SpriteID img, const TileInfo *ti, int dx, int dy, int h)
    01068 {
    01069   int x = ti->x | dx;
    01070   int y = ti->y | dy;
    01071   byte z = ti->z;
    01072   if (ti->tileh != SLOPE_FLAT) z = GetSlopeZ(x, y);
    01073   AddSortableSpriteToDraw(img, PAL_NONE, x, y, 2, 2, h, z);
    01074 }
    01075
    01080 static void DrawRoadBits(TileInfo *ti)
    01081 {
    01082   RoadBits road = GetRoadBits(ti->tile, ROADTYPE_ROAD);
    01083   RoadBits tram = GetRoadBits(ti->tile, ROADTYPE_TRAM);
    01084
    01085   SpriteID image = 0;
    01086   SpriteID pal = PAL_NONE;
    01087
    01088   if (ti->tileh != SLOPE_FLAT) {
    01089     DrawFoundation(ti, GetRoadFoundation(ti->tileh, road | tram));
    01090
    01091     /* DrawFoundation() modifies ti.
    01092      * Default sloped sprites.. */
    01093     if (ti->tileh != SLOPE_FLAT) image = _road_sloped_sprites[ti->tileh - 1] + 0x53F;
    01094   }
    01095
    01096   if (image == 0) image = _road_tile_sprites_1[road != ROAD_NONE ? road : tram];
    01097
    01098   Roadside roadside = GetRoadside(ti->tile);
    01099
    01100   if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
    01101     image += 19;
    01102   } else {
    01103     switch (roadside) {
    01104       case ROADSIDE_BARREN:           pal = PALETTE_TO_BARE_LAND; break;
    01105       case ROADSIDE_GRASS:            break;
    01106       case ROADSIDE_GRASS_ROAD_WORKS: break;
    01107       default:                        image -= 19; break; // Paved
    01108     }
    01109   }
    01110
    01111   DrawGroundSprite(image, pal);
    01112
    01113   /* For tram we overlay the road graphics with either tram tracks only
    01114    * (when there is actual road beneath the trams) or with tram tracks
    01115    * and some dirts which hides the road graphics */
    01116   if (tram != ROAD_NONE) {
    01117     if (ti->tileh != SLOPE_FLAT) {
    01118       image = _road_sloped_sprites[ti->tileh - 1] + SPR_TRAMWAY_SLOPED_OFFSET;
    01119     } else {
    01120       image = _road_tile_sprites_1[tram] - SPR_ROAD_Y;
    01121     }
    01122     image += (road == ROAD_NONE) ? SPR_TRAMWAY_TRAM : SPR_TRAMWAY_OVERLAY;
    01123     DrawGroundSprite(image, pal);
    01124   }
    01125
    01126   if (road != ROAD_NONE) {
    01127     DisallowedRoadDirections drd = GetDisallowedRoadDirections(ti->tile);
    01128     if (drd != DRD_NONE) {
    01129       DrawRoadDetail(SPR_ONEWAY_BASE + drd - 1 + ((road == ROAD_X) ? 0 : 3), ti, 8, 8, 0);
    01130     }
    01131   }
    01132
    01133   if (HasRoadWorks(ti->tile)) {
    01134     /* Road works */
    01135     DrawGroundSprite((road | tram) & ROAD_X ? SPR_EXCAVATION_X : SPR_EXCAVATION_Y, PAL_NONE);
    01136     return;
    01137   }
    01138
    01139   if (tram != ROAD_NONE) DrawTramCatenary(ti, tram);
    01140
    01141   /* Return if full detail is disabled, or we are zoomed fully out. */
    01142   if (!HasBit(_display_opt, DO_FULL_DETAIL) || _cur_dpi->zoom > ZOOM_LVL_DETAIL) return;
    01143
    01144   /* Do not draw details (street lights, trees) under low bridge */
    01145   if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && (roadside == ROADSIDE_TREES || roadside == ROADSIDE_STREET_LIGHTS)) {
    01146     uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
    01147     uint minz = GetTileMaxZ(ti->tile) + 2 * TILE_HEIGHT;
    01148
    01149     if (roadside == ROADSIDE_TREES) minz += TILE_HEIGHT;
    01150
    01151     if (height < minz) return;
    01152   }
    01153
    01154   /* If there are no road bits, return, as there is nothing left to do */
    01155   if (CountBits(road) < 2) return;
    01156
    01157   /* Draw extra details. */
    01158   for (const DrawRoadTileStruct *drts = _road_display_table[roadside][road | tram]; drts->image != 0; drts++) {
    01159     DrawRoadDetail(drts->image, ti, drts->subcoord_x, drts->subcoord_y, 0x10);
    01160   }
    01161 }
    01162
    01164 static void DrawTile_Road(TileInfo *ti)
    01165 {
    01166   switch (GetRoadTileType(ti->tile)) {
    01167     case ROAD_TILE_NORMAL:
    01168       DrawRoadBits(ti);
    01169       break;
    01170
    01171     case ROAD_TILE_CROSSING: {
    01172       if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
    01173
    01174       SpriteID image = GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.crossing;
    01175       SpriteID pal = PAL_NONE;
    01176
    01177       if (GetCrossingRoadAxis(ti->tile) == AXIS_X) image++;
    01178       if (IsCrossingBarred(ti->tile)) image += 2;
    01179
    01180       Roadside roadside = GetRoadside(ti->tile);
    01181
    01182       if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
    01183         image += 8;
    01184       } else {
    01185         switch (roadside) {
    01186           case ROADSIDE_BARREN: pal = PALETTE_TO_BARE_LAND; break;
    01187           case ROADSIDE_GRASS:  break;
    01188           default:              image += 4; break; // Paved
    01189         }
    01190       }
    01191
    01192       DrawGroundSprite(image, pal);
    01193
    01194       /* PBS debugging, draw reserved tracks darker */
    01195       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasCrossingReservation(ti->tile)) {
    01196         DrawGroundSprite(GetCrossingRoadAxis(ti->tile) == AXIS_Y ? GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_x : GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_y, PALETTE_CRASH);
    01197       }
    01198
    01199       if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
    01200         DrawGroundSprite(SPR_TRAMWAY_OVERLAY + (GetCrossingRoadAxis(ti->tile) ^ 1), pal);
    01201         DrawTramCatenary(ti, GetCrossingRoadBits(ti->tile));
    01202       }
    01203       if (HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
    01204       break;
    01205     }
    01206
    01207     default:
    01208     case ROAD_TILE_DEPOT: {
    01209       if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
    01210
    01211       SpriteID palette = COMPANY_SPRITE_COLOUR(GetTileOwner(ti->tile));
    01212
    01213       const DrawTileSprites *dts;
    01214       if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
    01215         dts =  &_tram_depot[GetRoadDepotDirection(ti->tile)];
    01216       } else {
    01217         dts =  &_road_depot[GetRoadDepotDirection(ti->tile)];
    01218       }
    01219
    01220       DrawGroundSprite(dts->ground.sprite, PAL_NONE);
    01221
    01222       /* End now if buildings are invisible */
    01223       if (IsInvisibilitySet(TO_BUILDINGS)) break;
    01224
    01225       for (const DrawTileSeqStruct *dtss = dts->seq; dtss->image.sprite != 0; dtss++) {
    01226         SpriteID image = dtss->image.sprite;
    01227         SpriteID pal;
    01228
    01229         if (!IsTransparencySet(TO_BUILDINGS) && HasBit(image, PALETTE_MODIFIER_COLOUR)) {
    01230           pal = palette;
    01231         } else {
    01232           pal = PAL_NONE;
    01233         }
    01234
    01235         AddSortableSpriteToDraw(
    01236           image, pal,
    01237           ti->x + dtss->delta_x, ti->y + dtss->delta_y,
    01238           dtss->size_x, dtss->size_y,
    01239           dtss->size_z, ti->z,
    01240           IsTransparencySet(TO_BUILDINGS)
    01241         );
    01242       }
    01243       break;
    01244     }
    01245   }
    01246   DrawBridgeMiddle(ti);
    01247 }
    01248
    01249 void DrawRoadDepotSprite(int x, int y, DiagDirection dir, RoadType rt)
    01250 {
    01251   SpriteID palette = COMPANY_SPRITE_COLOUR(_local_company);
    01252   const DrawTileSprites *dts = (rt == ROADTYPE_TRAM) ? &_tram_depot[dir] : &_road_depot[dir];
    01253
    01254   x += 33;
    01255   y += 17;
    01256
    01257   DrawSprite(dts->ground.sprite, PAL_NONE, x, y);
    01258
    01259   for (const DrawTileSeqStruct *dtss = dts->seq; dtss->image.sprite != 0; dtss++) {
    01260     Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z);
    01261     SpriteID image = dtss->image.sprite;
    01262
    01263     DrawSprite(image, HasBit(image, PALETTE_MODIFIER_COLOUR) ? palette : PAL_NONE, x + pt.x, y + pt.y);
    01264   }
    01265 }
    01266
    01272 void UpdateNearestTownForRoadTiles(bool invalidate)
    01273 {
    01274   assert(!invalidate || _generating_world);
    01275
    01276   for (TileIndex t = 0; t < MapSize(); t++) {
    01277     if (IsTileType(t, MP_ROAD) && !IsRoadDepot(t) && !HasTownOwnedRoad(t)) {
    01278       TownID tid = (TownID)INVALID_TOWN;
    01279       if (!invalidate) {
    01280         const Town *town = CalcClosestTownFromTile(t);
    01281         if (town != NULL) tid = town->index;
    01282       }
    01283       SetTownIndex(t, tid);
    01284     }
    01285   }
    01286 }
    01287
    01288 static uint GetSlopeZ_Road(TileIndex tile, uint x, uint y)
    01289 {
    01290   uint z;
    01291   Slope tileh = GetTileSlope(tile, &z);
    01292
    01293   if (tileh == SLOPE_FLAT) return z;
    01294   if (IsNormalRoad(tile)) {
    01295     Foundation f = GetRoadFoundation(tileh, GetAllRoadBits(tile));
    01296     z += ApplyFoundationToSlope(f, &tileh);
    01297     return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
    01298   } else {
    01299     return z + TILE_HEIGHT;
    01300   }
    01301 }
    01302
    01303 static Foundation GetFoundation_Road(TileIndex tile, Slope tileh)
    01304 {
    01305   if (IsNormalRoad(tile)) {
    01306     return GetRoadFoundation(tileh, GetAllRoadBits(tile));
    01307   } else {
    01308     return FlatteningFoundation(tileh);
    01309   }
    01310 }
    01311
    01312 static const Roadside _town_road_types[][2] = {
    01313   { ROADSIDE_GRASS,         ROADSIDE_GRASS },
    01314   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
    01315   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
    01316   { ROADSIDE_TREES,         ROADSIDE_TREES },
    01317   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
    01318 };
    01319
    01320 static const Roadside _town_road_types_2[][2] = {
    01321   { ROADSIDE_GRASS,         ROADSIDE_GRASS },
    01322   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
    01323   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
    01324   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
    01325   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
    01326 };
    01327
    01328
    01329 static void TileLoop_Road(TileIndex tile)
    01330 {
    01331   switch (_settings_game.game_creation.landscape) {
    01332     case LT_ARCTIC:
    01333       if (IsOnSnow(tile) != (GetTileZ(tile) > GetSnowLine())) {
    01334         ToggleSnow(tile);
    01335         MarkTileDirtyByTile(tile);
    01336       }
    01337       break;
    01338
    01339     case LT_TROPIC:
    01340       if (GetTropicZone(tile) == TROPICZONE_DESERT && !IsOnDesert(tile)) {
    01341         ToggleDesert(tile);
    01342         MarkTileDirtyByTile(tile);
    01343       }
    01344       break;
    01345   }
    01346
    01347   if (IsRoadDepot(tile)) return;
    01348
    01349   const Town *t = ClosestTownFromTile(tile, UINT_MAX);
    01350   if (!HasRoadWorks(tile)) {
    01351     HouseZonesBits grp = HZB_TOWN_EDGE;
    01352
    01353     if (t != NULL) {
    01354       grp = GetTownRadiusGroup(t, tile);
    01355
    01356       /* Show an animation to indicate road work */
    01357       if (t->road_build_months != 0 &&
    01358           (DistanceManhattan(t->xy, tile) < 8 || grp != HZB_TOWN_EDGE) &&
    01359           IsNormalRoad(tile) && CountBits(GetAllRoadBits(tile)) > 1 ) {
    01360         if (GetFoundationSlope(tile, NULL) == SLOPE_FLAT && EnsureNoVehicleOnGround(tile) && Chance16(1, 40)) {
    01361           StartRoadWorks(tile);
    01362
    01363           SndPlayTileFx(SND_21_JACKHAMMER, tile);
    01364           CreateEffectVehicleAbove(
    01365             TileX(tile) * TILE_SIZE + 7,
    01366             TileY(tile) * TILE_SIZE + 7,
    01367             0,
    01368             EV_BULLDOZER);
    01369           MarkTileDirtyByTile(tile);
    01370           return;
    01371         }
    01372       }
    01373     }
    01374
    01375     {
    01376       /* Adjust road ground type depending on 'grp' (grp is the distance to the center) */
    01377       const Roadside *new_rs = (_settings_game.game_creation.landscape == LT_TOYLAND) ? _town_road_types_2[grp] : _town_road_types[grp];
    01378       Roadside cur_rs = GetRoadside(tile);
    01379
    01380       /* We have our desired type, do nothing */
    01381       if (cur_rs == new_rs[0]) return;
    01382
    01383       /* We have the pre-type of the desired type, switch to the desired type */
    01384       if (cur_rs == new_rs[1]) {
    01385         cur_rs = new_rs[0];
    01386       /* We have barren land, install the pre-type */
    01387       } else if (cur_rs == ROADSIDE_BARREN) {
    01388         cur_rs = new_rs[1];
    01389       /* We're totally off limits, remove any installation and make barren land */
    01390       } else {
    01391         cur_rs = ROADSIDE_BARREN;
    01392       }
    01393       SetRoadside(tile, cur_rs);
    01394       MarkTileDirtyByTile(tile);
    01395     }
    01396   } else if (IncreaseRoadWorksCounter(tile)) {
    01397     TerminateRoadWorks(tile);
    01398
    01399     if (_settings_game.economy.mod_road_rebuild) {
    01400       /* Generate a nicer town surface */
    01401       const RoadBits old_rb = GetAnyRoadBits(tile, ROADTYPE_ROAD);
    01402       const RoadBits new_rb = CleanUpRoadBits(tile, old_rb);
    01403
    01404       if (old_rb != new_rb) {
    01405         RemoveRoad(tile, DC_EXEC | DC_AUTO | DC_NO_WATER, (old_rb ^ new_rb), ROADTYPE_ROAD, true);
    01406       }
    01407     }
    01408
    01409     MarkTileDirtyByTile(tile);
    01410   }
    01411 }
    01412
    01413 static bool ClickTile_Road(TileIndex tile)
    01414 {
    01415   if (!IsRoadDepot(tile)) return false;
    01416
    01417   ShowDepotWindow(tile, VEH_ROAD);
    01418   return true;
    01419 }
    01420
    01421 /* Converts RoadBits to TrackBits */
    01422 static const byte _road_trackbits[16] = {
    01423   0x0, 0x0, 0x0, 0x10, 0x0, 0x2, 0x8, 0x1A, 0x0, 0x4, 0x1, 0x15, 0x20, 0x26, 0x29, 0x3F,
    01424 };
    01425
    01426 static TrackStatus GetTileTrackStatus_Road(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
    01427 {
    01428   TrackdirBits trackdirbits = TRACKDIR_BIT_NONE;
    01429   TrackdirBits red_signals = TRACKDIR_BIT_NONE; // crossing barred
    01430   switch (mode) {
    01431     case TRANSPORT_RAIL:
    01432       if (IsLevelCrossing(tile)) trackdirbits = TrackBitsToTrackdirBits(GetCrossingRailBits(tile));
    01433       break;
    01434
    01435     case TRANSPORT_ROAD:
    01436       if ((GetRoadTypes(tile) & sub_mode) == 0) break;
    01437       switch (GetRoadTileType(tile)) {
    01438         case ROAD_TILE_NORMAL: {
    01439           const uint drd_to_multiplier[DRD_END] = { 0x101, 0x100, 0x1, 0x0 };
    01440           RoadType rt = (RoadType)FindFirstBit(sub_mode);
    01441           RoadBits bits = GetRoadBits(tile, rt);
    01442
    01443           /* no roadbit at this side of tile, return 0 */
    01444           if (side != INVALID_DIAGDIR && (DiagDirToRoadBits(side) & bits) == 0) break;
    01445
    01446           uint multiplier = drd_to_multiplier[rt == ROADTYPE_TRAM ? DRD_NONE : GetDisallowedRoadDirections(tile)];
    01447           if (!HasRoadWorks(tile)) trackdirbits = (TrackdirBits)(_road_trackbits[bits] * multiplier);
    01448           break;
    01449         }
    01450
    01451         case ROAD_TILE_CROSSING: {
    01452           Axis axis = GetCrossingRoadAxis(tile);
    01453
    01454           if (side != INVALID_DIAGDIR && axis != DiagDirToAxis(side)) break;
    01455
    01456           trackdirbits = TrackBitsToTrackdirBits(AxisToTrackBits(axis));
    01457           if (IsCrossingBarred(tile)) red_signals = trackdirbits;
    01458           break;
    01459         }
    01460
    01461         default:
    01462         case ROAD_TILE_DEPOT: {
    01463           DiagDirection dir = GetRoadDepotDirection(tile);
    01464
    01465           if (side != INVALID_DIAGDIR && side != dir) break;
    01466
    01467           trackdirbits = TrackBitsToTrackdirBits(DiagDirToDiagTrackBits(dir));
    01468           break;
    01469         }
    01470       }
    01471       break;
    01472
    01473     default: break;
    01474   }
    01475   return CombineTrackStatus(trackdirbits, red_signals);
    01476 }
    01477
    01478 static const StringID _road_tile_strings[] = {
    01479   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01480   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01481   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01482   STR_LAI_ROAD_DESCRIPTION_ROAD_WITH_STREETLIGHTS,
    01483   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01484   STR_LAI_ROAD_DESCRIPTION_TREE_LINED_ROAD,
    01485   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01486   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01487 };
    01488
    01489 static void GetTileDesc_Road(TileIndex tile, TileDesc *td)
    01490 {
    01491   Owner rail_owner = INVALID_OWNER;
    01492   Owner road_owner = INVALID_OWNER;
    01493   Owner tram_owner = INVALID_OWNER;
    01494
    01495   switch (GetRoadTileType(tile)) {
    01496     case ROAD_TILE_CROSSING: {
    01497       td->str = STR_LAI_ROAD_DESCRIPTION_ROAD_RAIL_LEVEL_CROSSING;
    01498       RoadTypes rts = GetRoadTypes(tile);
    01499       rail_owner = GetTileOwner(tile);
    01500       if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    01501       if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
    01502       break;
    01503     }
    01504
    01505     case ROAD_TILE_DEPOT:
    01506       td->str = STR_LAI_ROAD_DESCRIPTION_ROAD_VEHICLE_DEPOT;
    01507       road_owner = GetTileOwner(tile); // Tile has only one owner, roadtype does not matter
    01508       break;
    01509
    01510     default: {
    01511       RoadTypes rts = GetRoadTypes(tile);
    01512       td->str = (HasBit(rts, ROADTYPE_ROAD) ? _road_tile_strings[GetRoadside(tile)] : STR_LAI_ROAD_DESCRIPTION_TRAMWAY);
    01513       if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    01514       if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
    01515       break;
    01516     }
    01517   }
    01518
    01519   /* Now we have to discover, if the tile has only one owner or many:
    01520    *   - Find a first_owner of the tile. (Currently road or tram must be present, but this will break when the third type becomes available)
    01521    *   - Compare the found owner with the other owners, and test if they differ.
    01522    * Note: If road exists it will be the first_owner.
    01523    */
    01524   Owner first_owner = (road_owner == INVALID_OWNER ? tram_owner : road_owner);
    01525   bool mixed_owners = (tram_owner != INVALID_OWNER && tram_owner != first_owner) || (rail_owner != INVALID_OWNER && rail_owner != first_owner);
    01526
    01527   if (mixed_owners) {
    01528     /* Multiple owners */
    01529     td->owner_type[0] = (rail_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_RAIL_OWNER);
    01530     td->owner[0] = rail_owner;
    01531     td->owner_type[1] = (road_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_ROAD_OWNER);
    01532     td->owner[1] = road_owner;
    01533     td->owner_type[2] = (tram_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_TRAM_OWNER);
    01534     td->owner[2] = tram_owner;
    01535   } else {
    01536     /* One to rule them all */
    01537     td->owner[0] = first_owner;
    01538   }
    01539 }
    01540
    01545 static const byte _roadveh_enter_depot_dir[4] = {
    01546   TRACKDIR_X_SW, TRACKDIR_Y_NW, TRACKDIR_X_NE, TRACKDIR_Y_SE
    01547 };
    01548
    01549 static VehicleEnterTileStatus VehicleEnter_Road(Vehicle *v, TileIndex tile, int x, int y)
    01550 {
    01551   switch (GetRoadTileType(tile)) {
    01552     case ROAD_TILE_DEPOT: {
    01553       if (v->type != VEH_ROAD) break;
    01554
    01555       RoadVehicle *rv = RoadVehicle::From(v);
    01556       if (rv->frame == RVC_DEPOT_STOP_FRAME &&
    01557           _roadveh_enter_depot_dir[GetRoadDepotDirection(tile)] == rv->state) {
    01558         rv->state = RVSB_IN_DEPOT;
    01559         rv->vehstatus |= VS_HIDDEN;
    01560         rv->direction = ReverseDir(rv->direction);
    01561         if (rv->Next() == NULL) VehicleEnterDepot(rv->First());
    01562         rv->tile = tile;
    01563
    01564         InvalidateWindowData(WC_VEHICLE_DEPOT, rv->tile);
    01565         return VETSB_ENTERED_WORMHOLE;
    01566       }
    01567     } break;
    01568
    01569     default: break;
    01570   }
    01571   return VETSB_CONTINUE;
    01572 }
    01573
    01574
    01575 static void ChangeTileOwner_Road(TileIndex tile, Owner old_owner, Owner new_owner)
    01576 {
    01577   if (IsRoadDepot(tile)) {
    01578     if (GetTileOwner(tile) == old_owner) {
    01579       if (new_owner == INVALID_OWNER) {
    01580         DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
    01581       } else {
    01582         SetTileOwner(tile, new_owner);
    01583       }
    01584     }
    01585     return;
    01586   }
    01587
    01588   for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
    01589     /* Update all roadtypes, no matter if they are present */
    01590     if (GetRoadOwner(tile, rt) == old_owner) {
    01591       SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
    01592     }
    01593   }
    01594
    01595   if (IsLevelCrossing(tile)) {
    01596     if (GetTileOwner(tile) == old_owner) {
    01597       if (new_owner == INVALID_OWNER) {
    01598         DoCommand(tile, 0, GetCrossingRailTrack(tile), DC_EXEC | DC_BANKRUPT, CMD_REMOVE_SINGLE_RAIL);
    01599       } else {
    01600         SetTileOwner(tile, new_owner);
    01601       }
    01602     }
    01603   }
    01604 }
    01605
    01606 static CommandCost TerraformTile_Road(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
    01607 {
    01608   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
    01609     switch (GetRoadTileType(tile)) {
    01610       case ROAD_TILE_CROSSING:
    01611         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]);
    01612         break;
    01613
    01614       case ROAD_TILE_DEPOT:
    01615         if (AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, GetRoadDepotDirection(tile))) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    01616         break;
    01617
    01618       case ROAD_TILE_NORMAL: {
    01619         RoadBits bits = GetAllRoadBits(tile);
    01620         RoadBits bits_copy = bits;
    01621         /* Check if the slope-road_bits combination is valid at all, i.e. it is safe to call GetRoadFoundation(). */
    01622         if (!CmdFailed(CheckRoadSlope(tileh_new, &bits_copy, ROAD_NONE, ROAD_NONE))) {
    01623           /* CheckRoadSlope() sometimes changes the road_bits, if it does not agree with them. */
    01624           if (bits == bits_copy) {
    01625             uint z_old;
    01626             Slope tileh_old = GetTileSlope(tile, &z_old);
    01627
    01628             /* Get the slope on top of the foundation */
    01629             z_old += ApplyFoundationToSlope(GetRoadFoundation(tileh_old, bits), &tileh_old);
    01630             z_new += ApplyFoundationToSlope(GetRoadFoundation(tileh_new, bits), &tileh_new);
    01631
    01632             /* The surface slope must not be changed */
    01633             if ((z_old == z_new) && (tileh_old == tileh_new)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    01634           }
    01635         }
    01636         break;
    01637       }
    01638
    01639       default: NOT_REACHED();
    01640     }
    01641   }
    01642
    01643   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    01644 }
    01645
    01647 extern const TileTypeProcs _tile_type_road_procs = {
    01648   DrawTile_Road,           // draw_tile_proc
    01649   GetSlopeZ_Road,          // get_slope_z_proc
    01650   ClearTile_Road,          // clear_tile_proc
    01651   NULL,                    // add_accepted_cargo_proc
    01652   GetTileDesc_Road,        // get_tile_desc_proc
    01653   GetTileTrackStatus_Road, // get_tile_track_status_proc
    01654   ClickTile_Road,          // click_tile_proc
    01655   NULL,                    // animate_tile_proc
    01656   TileLoop_Road,           // tile_loop_clear
    01657   ChangeTileOwner_Road,    // change_tile_owner_clear
    01658   NULL,                    // add_produced_cargo_proc
    01659   VehicleEnter_Road,       // vehicle_enter_tile_proc
    01660   GetFoundation_Road,      // get_foundation_proc
    01661   TerraformTile_Road,      // terraform_tile_proc
    01662 };