# road_cmd.cpp

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    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 "cmd_helper.h"
    00014 #include "road_internal.h"
    00015 #include "viewport_func.h"
    00016 #include "command_func.h"
    00017 #include "pathfinder/yapf/yapf_cache.h"
    00018 #include "depot_base.h"
    00019 #include "newgrf.h"
    00020 #include "autoslope.h"
    00021 #include "tunnelbridge_map.h"
    00022 #include "strings_func.h"
    00023 #include "vehicle_func.h"
    00024 #include "sound_func.h"
    00025 #include "tunnelbridge.h"
    00026 #include "cheat_type.h"
    00027 #include "effectvehicle_func.h"
    00028 #include "effectvehicle_base.h"
    00029 #include "elrail_func.h"
    00030 #include "roadveh.h"
    00031 #include "town.h"
    00032 #include "company_base.h"
    00033 #include "core/random_func.hpp"
    00034 #include "newgrf_railtype.h"
    00035 #include "date_func.h"
    00036 #include "genworld.h"
    00037 #include "company_gui.h"
    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
    00054 static const RoadBits _invalid_tileh_slopes_road[2][15] = {
    00055   /* The inverse of the mixable RoadBits on a leveled slope */
    00056   {
    00057     ROAD_NONE,         // SLOPE_FLAT
    00058     ROAD_NE | ROAD_SE, // SLOPE_W
    00059     ROAD_NE | ROAD_NW, // SLOPE_S
    00060
    00061     ROAD_NE,           // SLOPE_SW
    00062     ROAD_NW | ROAD_SW, // SLOPE_E
    00063     ROAD_NONE,         // SLOPE_EW
    00064
    00065     ROAD_NW,           // SLOPE_SE
    00066     ROAD_NONE,         // SLOPE_WSE
    00067     ROAD_SE | ROAD_SW, // SLOPE_N
    00068
    00069     ROAD_SE,           // SLOPE_NW
    00070     ROAD_NONE,         // SLOPE_NS
    00071     ROAD_NONE,         // SLOPE_ENW
    00072
    00073     ROAD_SW,           // SLOPE_NE
    00074     ROAD_NONE,         // SLOPE_SEN
    00075     ROAD_NONE          // SLOPE_NWS
    00076   },
    00077   /* The inverse of the allowed straight roads on a slope
    00078    * (with and without a foundation). */
    00079   {
    00080     ROAD_NONE, // SLOPE_FLAT
    00081     ROAD_NONE, // SLOPE_W    Foundation
    00082     ROAD_NONE, // SLOPE_S    Foundation
    00083
    00084     ROAD_Y,    // SLOPE_SW
    00085     ROAD_NONE, // SLOPE_E    Foundation
    00086     ROAD_ALL,  // SLOPE_EW
    00087
    00088     ROAD_X,    // SLOPE_SE
    00089     ROAD_ALL,  // SLOPE_WSE
    00090     ROAD_NONE, // SLOPE_N    Foundation
    00091
    00092     ROAD_X,    // SLOPE_NW
    00093     ROAD_ALL,  // SLOPE_NS
    00094     ROAD_ALL,  // SLOPE_ENW
    00095
    00096     ROAD_Y,    // SLOPE_NE
    00097     ROAD_ALL,  // SLOPE_SEN
    00098     ROAD_ALL   // SLOPE_NW
    00099   }
    00100 };
    00101
    00102 static Foundation GetRoadFoundation(Slope tileh, RoadBits bits);
    00103
    00114 CommandCost CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, Owner owner, RoadType rt, DoCommandFlag flags, bool town_check)
    00115 {
    00116   if (_game_mode == GM_EDITOR || remove == ROAD_NONE) return CommandCost();
    00117
    00118   /* Water can always flood and towns can always remove "normal" road pieces.
    00119    * Towns are not be allowed to remove non "normal" road pieces, like tram
    00120    * tracks as that would result in trams that cannot turn. */
    00121   if (_current_company == OWNER_WATER ||
    00122       (rt == ROADTYPE_ROAD && !Company::IsValidID(_current_company))) return CommandCost();
    00123
    00124   /* Only do the special processing if the road is owned
    00125    * by a town */
    00126   if (owner != OWNER_TOWN) {
    00127     if (owner == OWNER_NONE) return CommandCost();
    00128     CommandCost ret = CheckOwnership(owner);
    00129     return ret;
    00130   }
    00131
    00132   if (!town_check) return CommandCost();
    00133
    00134   if (_cheats.magic_bulldozer.value) return CommandCost();
    00135
    00136   Town *t = ClosestTownFromTile(tile, UINT_MAX);
    00137   if (t == NULL) return CommandCost();
    00138
    00139   /* check if you're allowed to remove the street owned by a town
    00140    * removal allowance depends on difficulty setting */
    00141   CommandCost ret = CheckforTownRating(flags, t, ROAD_REMOVE);
    00142   if (ret.Failed()) return ret;
    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       return_cmd_error(STR_ERROR_LOCAL_AUTHORITY_REFUSES_TO_ALLOW_THIS);
    00160     }
    00161     rating_decrease = RATING_ROAD_DOWN_STEP_INNER;
    00162   }
    00163   ChangeTownRating(t, rating_decrease, RATING_ROAD_MINIMUM, flags);
    00164
    00165   return CommandCost();
    00166 }
    00167
    00168
    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(rt == ROADTYPE_TRAM ? STR_ERROR_THERE_IS_NO_TRAMWAY : STR_ERROR_THERE_IS_NO_ROAD);
    00183
    00184   switch (GetTileType(tile)) {
    00185     case MP_ROAD: {
    00186       CommandCost ret = EnsureNoVehicleOnGround(tile);
    00187       if (ret.Failed()) return ret;
    00188       break;
    00189     }
    00190
    00191     case MP_STATION: {
    00192       if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;
    00193
    00194       CommandCost ret = EnsureNoVehicleOnGround(tile);
    00195       if (ret.Failed()) return ret;
    00196       break;
    00197     }
    00198
    00199     case MP_TUNNELBRIDGE: {
    00200       if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) return CMD_ERROR;
    00201       CommandCost ret = TunnelBridgeIsFree(tile, GetOtherTunnelBridgeEnd(tile));
    00202       if (ret.Failed()) return ret;
    00203       break;
    00204     }
    00205
    00206     default:
    00207       return CMD_ERROR;
    00208   }
    00209
    00210   CommandCost ret = CheckAllowRemoveRoad(tile, pieces, GetRoadOwner(tile, rt), rt, flags, town_check);
    00211   if (ret.Failed()) return ret;
    00212
    00213   if (!IsTileType(tile, MP_ROAD)) {
    00214     /* If it's the last roadtype, just clear the whole tile */
    00215     if (rts == RoadTypeToRoadTypes(rt)) return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00216
    00217     CommandCost cost(EXPENSES_CONSTRUCTION);
    00218     if (IsTileType(tile, MP_TUNNELBRIDGE)) {
    00219       TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
    00220       /* Pay for *every* tile of the bridge or tunnel */
    00221       uint len = GetTunnelBridgeLength(other_end, tile) + 2;
    00222       cost.AddCost(len * _price[PR_CLEAR_ROAD]);
    00223       if (flags & DC_EXEC) {
    00224         Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
    00225         if (c != NULL) {
    00226           /* A full diagonal road tile has two road bits. */
    00227           c->infrastructure.road[rt] -= len * 2 * TUNNELBRIDGE_TRACKBIT_FACTOR;
    00228           DirtyCompanyInfrastructureWindows(c->index);
    00229         }
    00230
    00231         SetRoadTypes(other_end, GetRoadTypes(other_end) & ~RoadTypeToRoadTypes(rt));
    00232         SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
    00233
    00234         /* If the owner of the bridge sells all its road, also move the ownership
    00235          * to the owner of the other roadtype. */
    00236         RoadType other_rt = (rt == ROADTYPE_ROAD) ? ROADTYPE_TRAM : ROADTYPE_ROAD;
    00237         Owner other_owner = GetRoadOwner(tile, other_rt);
    00238         if (other_owner != GetTileOwner(tile)) {
    00239           SetTileOwner(tile, other_owner);
    00240           SetTileOwner(other_end, other_owner);
    00241         }
    00242
    00243         /* Mark tiles dirty that have been repaved */
    00244         MarkTileDirtyByTile(tile);
    00245         MarkTileDirtyByTile(other_end);
    00246         if (IsBridge(tile)) {
    00247           TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
    00248
    00249           for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
    00250         }
    00251       }
    00252     } else {
    00253       assert(IsDriveThroughStopTile(tile));
    00254       cost.AddCost(_price[PR_CLEAR_ROAD] * 2);
    00255       if (flags & DC_EXEC) {
    00256         Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
    00257         if (c != NULL) {
    00258           /* A full diagonal road tile has two road bits. */
    00259           c->infrastructure.road[rt] -= 2;
    00260           DirtyCompanyInfrastructureWindows(c->index);
    00261         }
    00262         SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
    00263         MarkTileDirtyByTile(tile);
    00264       }
    00265     }
    00266     return cost;
    00267   }
    00268
    00269   switch (GetRoadTileType(tile)) {
    00270     case ROAD_TILE_NORMAL: {
    00271       Slope tileh = GetTileSlope(tile);
    00272
    00273       /* Steep slopes behave the same as slopes with one corner raised. */
    00274       if (IsSteepSlope(tileh)) {
    00275         tileh = SlopeWithOneCornerRaised(GetHighestSlopeCorner(tileh));
    00276       }
    00277
    00278       RoadBits present = GetRoadBits(tile, rt);
    00279       const RoadBits other = GetOtherRoadBits(tile, rt);
    00280       const Foundation f = GetRoadFoundation(tileh, present);
    00281
    00282       if (HasRoadWorks(tile) && _current_company != OWNER_WATER) return_cmd_error(STR_ERROR_ROAD_WORKS_IN_PROGRESS);
    00283
    00284       /* Autocomplete to a straight road
    00285        * @li if the bits of the other roadtypes result in another foundation
    00286        * @li if build on slopes is disabled */
    00287       if ((IsStraightRoad(other) && (other & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) != ROAD_NONE) ||
    00288           (tileh != SLOPE_FLAT && !_settings_game.construction.build_on_slopes)) {
    00289         pieces |= MirrorRoadBits(pieces);
    00290       }
    00291
    00292       /* limit the bits to delete to the existing bits. */
    00293       pieces &= present;
    00294       if (pieces == ROAD_NONE) return_cmd_error(rt == ROADTYPE_TRAM ? STR_ERROR_THERE_IS_NO_TRAMWAY : STR_ERROR_THERE_IS_NO_ROAD);
    00295
    00296       /* Now set present what it will be after the remove */
    00297       present ^= pieces;
    00298
    00299       /* Check for invalid RoadBit combinations on slopes */
    00300       if (tileh != SLOPE_FLAT && present != ROAD_NONE &&
    00301           (present & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) == present) {
    00302         return CMD_ERROR;
    00303       }
    00304
    00305       if (flags & DC_EXEC) {
    00306         if (HasRoadWorks(tile)) {
    00307           /* flooding tile with road works, don't forget to remove the effect vehicle too */
    00308           assert(_current_company == OWNER_WATER);
    00309           EffectVehicle *v;
    00310           FOR_ALL_EFFECTVEHICLES(v) {
    00311             if (TileVirtXY(v->x_pos, v->y_pos) == tile) {
    00312               delete v;
    00313             }
    00314           }
    00315         }
    00316
    00317         Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
    00318         if (c != NULL) {
    00319           c->infrastructure.road[rt] -= CountBits(pieces);
    00320           DirtyCompanyInfrastructureWindows(c->index);
    00321         }
    00322
    00323         if (present == ROAD_NONE) {
    00324           RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
    00325           if (rts == ROADTYPES_NONE) {
    00326             /* Includes MarkTileDirtyByTile() */
    00327             DoClearSquare(tile);
    00328           } else {
    00329             if (rt == ROADTYPE_ROAD && IsRoadOwner(tile, ROADTYPE_ROAD, OWNER_TOWN)) {
    00330               /* Update nearest-town index */
    00331               const Town *town = CalcClosestTownFromTile(tile);
    00332               SetTownIndex(tile, town == NULL ? (TownID)INVALID_TOWN : town->index);
    00333             }
    00334             SetRoadBits(tile, ROAD_NONE, rt);
    00335             SetRoadTypes(tile, rts);
    00336             MarkTileDirtyByTile(tile);
    00337           }
    00338         } else {
    00339           /* When bits are removed, you *always* end up with something that
    00340            * is not a complete straight road tile. However, trams do not have
    00341            * onewayness, so they cannot remove it either. */
    00342           if (rt != ROADTYPE_TRAM) SetDisallowedRoadDirections(tile, DRD_NONE);
    00343           SetRoadBits(tile, present, rt);
    00344           MarkTileDirtyByTile(tile);
    00345         }
    00346       }
    00347
    00348       CommandCost cost(EXPENSES_CONSTRUCTION, CountBits(pieces) * _price[PR_CLEAR_ROAD]);
    00349       /* If we build a foundation we have to pay for it. */
    00350       if (f == FOUNDATION_NONE && GetRoadFoundation(tileh, present) != FOUNDATION_NONE) cost.AddCost(_price[PR_BUILD_FOUNDATION]);
    00351
    00352       return cost;
    00353     }
    00354
    00355     case ROAD_TILE_CROSSING: {
    00356       if (pieces & ComplementRoadBits(GetCrossingRoadBits(tile))) {
    00357         return CMD_ERROR;
    00358       }
    00359
    00360       /* Don't allow road to be removed from the crossing when there is tram;
    00361        * we can't draw the crossing without roadbits ;) */
    00362       if (rt == ROADTYPE_ROAD && HasTileRoadType(tile, ROADTYPE_TRAM) && (flags & DC_EXEC || crossing_check)) return CMD_ERROR;
    00363
    00364       if (flags & DC_EXEC) {
    00365         Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
    00366         if (c != NULL) {
    00367           /* A full diagonal road tile has two road bits. */
    00368           c->infrastructure.road[rt] -= 2;
    00369           DirtyCompanyInfrastructureWindows(c->index);
    00370         }
    00371
    00372         Track railtrack = GetCrossingRailTrack(tile);
    00373         RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
    00374         if (rts == ROADTYPES_NONE) {
    00375           TrackBits tracks = GetCrossingRailBits(tile);
    00376           bool reserved = HasCrossingReservation(tile);
    00377           MakeRailNormal(tile, GetTileOwner(tile), tracks, GetRailType(tile));
    00378           if (reserved) SetTrackReservation(tile, tracks);
    00379
    00380           /* Update rail count for level crossings. The plain track should still be accounted
    00381            * for, so only subtract the difference to the level crossing cost. */
    00382           c = Company::GetIfValid(GetTileOwner(tile));
    00383           if (c != NULL) c->infrastructure.rail[GetRailType(tile)] -= LEVELCROSSING_TRACKBIT_FACTOR - 1;
    00384         } else {
    00385           SetRoadTypes(tile, rts);
    00386         }
    00387         MarkTileDirtyByTile(tile);
    00388         YapfNotifyTrackLayoutChange(tile, railtrack);
    00389       }
    00390       return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_ROAD] * 2);
    00391     }
    00392
    00393     default:
    00394     case ROAD_TILE_DEPOT:
    00395       return CMD_ERROR;
    00396   }
    00397 }
    00398
    00399
    00411 static CommandCost CheckRoadSlope(Slope tileh, RoadBits *pieces, RoadBits existing, RoadBits other)
    00412 {
    00413   /* Remove already build pieces */
    00414   CLRBITS(*pieces, existing);
    00415
    00416   /* If we can't build anything stop here */
    00417   if (*pieces == ROAD_NONE) return CMD_ERROR;
    00418
    00419   /* All RoadBit combos are valid on flat land */
    00420   if (tileh == SLOPE_FLAT) return CommandCost();
    00421
    00422   /* Steep slopes behave the same as slopes with one corner raised. */
    00423   if (IsSteepSlope(tileh)) {
    00424     tileh = SlopeWithOneCornerRaised(GetHighestSlopeCorner(tileh));
    00425   }
    00426
    00427   /* Save the merge of all bits of the current type */
    00428   RoadBits type_bits = existing | *pieces;
    00429
    00430   /* Roads on slopes */
    00431   if (_settings_game.construction.build_on_slopes && (_invalid_tileh_slopes_road[0][tileh] & (other | type_bits)) == ROAD_NONE) {
    00432
    00433     /* If we add leveling we've got to pay for it */
    00434     if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00435
    00436     return CommandCost();
    00437   }
    00438
    00439   /* Autocomplete uphill roads */
    00440   *pieces |= MirrorRoadBits(*pieces);
    00441   type_bits = existing | *pieces;
    00442
    00443   /* Uphill roads */
    00444   if (IsStraightRoad(type_bits) && (other == type_bits || other == ROAD_NONE) &&
    00445       (_invalid_tileh_slopes_road[1][tileh] & (other | type_bits)) == ROAD_NONE) {
    00446
    00447     /* Slopes with foundation ? */
    00448     if (IsSlopeWithOneCornerRaised(tileh)) {
    00449
    00450       /* Prevent build on slopes if it isn't allowed */
    00451       if (_settings_game.construction.build_on_slopes) {
    00452
    00453         /* If we add foundation we've got to pay for it */
    00454         if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00455
    00456         return CommandCost();
    00457       }
    00458     } else {
    00459       if (HasExactlyOneBit(existing) && GetRoadFoundation(tileh, existing) == FOUNDATION_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00460       return CommandCost();
    00461     }
    00462   }
    00463   return CMD_ERROR;
    00464 }
    00465
    00477 CommandCost CmdBuildRoad(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00478 {
    00479   CompanyID company = _current_company;
    00480   CommandCost cost(EXPENSES_CONSTRUCTION);
    00481
    00482   RoadBits existing = ROAD_NONE;
    00483   RoadBits other_bits = ROAD_NONE;
    00484
    00485   /* Road pieces are max 4 bitset values (NE, NW, SE, SW) and town can only be non-zero
    00486    * if a non-company is building the road */
    00487   if ((Company::IsValidID(company) && p2 != 0) || (company == OWNER_TOWN && !Town::IsValidID(p2)) || (company == OWNER_DEITY && p2 != 0)) return CMD_ERROR;
    00488   if (company != OWNER_TOWN) {
    00489     const Town *town = CalcClosestTownFromTile(tile);
    00490     p2 = (town != NULL) ? town->index : (TownID)INVALID_TOWN;
    00491
    00492     if (company == OWNER_DEITY) {
    00493       company = OWNER_TOWN;
    00494
    00495       /* If we are not within a town, we are not owned by the town */
    00496       if (town == NULL || DistanceSquare(tile, town->xy) > town->squared_town_zone_radius[HZB_TOWN_EDGE]) {
    00497         company = OWNER_NONE;
    00498       }
    00499     }
    00500   }
    00501
    00502   RoadBits pieces = Extract<RoadBits, 0, 4>(p1);
    00503
    00504   /* do not allow building 'zero' road bits, code wouldn't handle it */
    00505   if (pieces == ROAD_NONE) return CMD_ERROR;
    00506
    00507   RoadType rt = Extract<RoadType, 4, 2>(p1);
    00508   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
    00509
    00510   DisallowedRoadDirections toggle_drd = Extract<DisallowedRoadDirections, 6, 2>(p1);
    00511
    00512   Slope tileh = GetTileSlope(tile);
    00513
    00514   bool need_to_clear = false;
    00515   switch (GetTileType(tile)) {
    00516     case MP_ROAD:
    00517       switch (GetRoadTileType(tile)) {
    00518         case ROAD_TILE_NORMAL: {
    00519           if (HasRoadWorks(tile)) return_cmd_error(STR_ERROR_ROAD_WORKS_IN_PROGRESS);
    00520
    00521           other_bits = GetOtherRoadBits(tile, rt);
    00522           if (!HasTileRoadType(tile, rt)) break;
    00523
    00524           existing = GetRoadBits(tile, rt);
    00525           bool crossing = !IsStraightRoad(existing | pieces);
    00526           if (rt != ROADTYPE_TRAM && (GetDisallowedRoadDirections(tile) != DRD_NONE || toggle_drd != DRD_NONE) && crossing) {
    00527             /* Junctions cannot be one-way */
    00528             return_cmd_error(STR_ERROR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
    00529           }
    00530           if ((existing & pieces) == pieces) {
    00531             /* We only want to set the (dis)allowed road directions */
    00532             if (toggle_drd != DRD_NONE && rt != ROADTYPE_TRAM) {
    00533               if (crossing) return_cmd_error(STR_ERROR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
    00534
    00535               Owner owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    00536               if (owner != OWNER_NONE) {
    00537                 CommandCost ret = CheckOwnership(owner, tile);
    00538                 if (ret.Failed()) return ret;
    00539               }
    00540
    00541               DisallowedRoadDirections dis_existing = GetDisallowedRoadDirections(tile);
    00542               DisallowedRoadDirections dis_new      = dis_existing ^ toggle_drd;
    00543
    00544               /* We allow removing disallowed directions to break up
    00545                * deadlocks, but adding them can break articulated
    00546                * vehicles. As such, only when less is disallowed,
    00547                * i.e. bits are removed, we skip the vehicle check. */
    00548               if (CountBits(dis_existing) <= CountBits(dis_new)) {
    00549                 CommandCost ret = EnsureNoVehicleOnGround(tile);
    00550                 if (ret.Failed()) return ret;
    00551               }
    00552
    00553               /* Ignore half built tiles */
    00554               if ((flags & DC_EXEC) && rt != ROADTYPE_TRAM && IsStraightRoad(existing)) {
    00555                 SetDisallowedRoadDirections(tile, dis_new);
    00556                 MarkTileDirtyByTile(tile);
    00557               }
    00558               return CommandCost();
    00559             }
    00560             return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00561           }
    00562           break;
    00563         }
    00564
    00565         case ROAD_TILE_CROSSING:
    00566           other_bits = GetCrossingRoadBits(tile);
    00567           if (pieces & ComplementRoadBits(other_bits)) goto do_clear;
    00568           pieces = other_bits; // 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 ROAD_TILE_DEPOT:
    00574           if ((GetAnyRoadBits(tile, rt) & pieces) == pieces) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00575           goto do_clear;
    00576
    00577         default: NOT_REACHED();
    00578       }
    00579       break;
    00580
    00581     case MP_RAILWAY: {
    00582       if (IsSteepSlope(tileh)) {
    00583         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00584       }
    00585
    00586       /* Level crossings may only be built on these slopes */
    00587       if (!HasBit(VALID_LEVEL_CROSSING_SLOPES, tileh)) {
    00588         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00589       }
    00590
    00591       if (GetRailTileType(tile) != RAIL_TILE_NORMAL) goto do_clear;
    00592
    00593       if (RailNoLevelCrossings(GetRailType(tile))) {
    00594         return_cmd_error(STR_ERROR_CROSSING_DISALLOWED);
    00595       }
    00596
    00597       Axis roaddir;
    00598       switch (GetTrackBits(tile)) {
    00599         case TRACK_BIT_X:
    00600           if (pieces & ROAD_X) goto do_clear;
    00601           roaddir = AXIS_Y;
    00602           break;
    00603
    00604         case TRACK_BIT_Y:
    00605           if (pieces & ROAD_Y) goto do_clear;
    00606           roaddir = AXIS_X;
    00607           break;
    00608
    00609         default: goto do_clear;
    00610       }
    00611
    00612       CommandCost ret = EnsureNoVehicleOnGround(tile);
    00613       if (ret.Failed()) return ret;
    00614
    00615       if (flags & DC_EXEC) {
    00616         Track railtrack = AxisToTrack(OtherAxis(roaddir));
    00617         YapfNotifyTrackLayoutChange(tile, railtrack);
    00618         /* Update company infrastructure counts. A level crossing has two road bits. */
    00619         Company *c = Company::GetIfValid(company);
    00620         if (c != NULL) {
    00621           c->infrastructure.road[rt] += 2;
    00622           if (rt != ROADTYPE_ROAD) c->infrastructure.road[ROADTYPE_ROAD] += 2;
    00623           DirtyCompanyInfrastructureWindows(company);
    00624         }
    00625         /* Update rail count for level crossings. The plain track is already
    00626          * counted, so only add the difference to the level crossing cost. */
    00627         c = Company::GetIfValid(GetTileOwner(tile));
    00628         if (c != NULL) c->infrastructure.rail[GetRailType(tile)] += LEVELCROSSING_TRACKBIT_FACTOR - 1;
    00629
    00630         /* Always add road to the roadtypes (can't draw without it) */
    00631         bool reserved = HasBit(GetRailReservationTrackBits(tile), railtrack);
    00632         MakeRoadCrossing(tile, company, company, GetTileOwner(tile), roaddir, GetRailType(tile), RoadTypeToRoadTypes(rt) | ROADTYPES_ROAD, p2);
    00633         SetCrossingReservation(tile, reserved);
    00634         UpdateLevelCrossing(tile, false);
    00635         MarkTileDirtyByTile(tile);
    00636       }
    00637       return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_ROAD] * (rt == ROADTYPE_ROAD ? 2 : 4));
    00638     }
    00639
    00640     case MP_STATION: {
    00641       if ((GetAnyRoadBits(tile, rt) & pieces) == pieces) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00642       if (!IsDriveThroughStopTile(tile)) goto do_clear;
    00643
    00644       RoadBits curbits = AxisToRoadBits(DiagDirToAxis(GetRoadStopDir(tile)));
    00645       if (pieces & ~curbits) goto do_clear;
    00646       pieces = curbits; // we need to pay for both roadbits
    00647
    00648       if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00649       break;
    00650     }
    00651
    00652     case MP_TUNNELBRIDGE: {
    00653       if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) goto do_clear;
    00654       if (MirrorRoadBits(DiagDirToRoadBits(GetTunnelBridgeDirection(tile))) != pieces) goto do_clear;
    00655       if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00656       /* Don't allow adding roadtype to the bridge/tunnel when vehicles are already driving on it */
    00657       CommandCost ret = TunnelBridgeIsFree(tile, GetOtherTunnelBridgeEnd(tile));
    00658       if (ret.Failed()) return ret;
    00659       break;
    00660     }
    00661
    00662     default: {
    00663 do_clear:;
    00664       need_to_clear = true;
    00665       break;
    00666     }
    00667   }
    00668
    00669   if (need_to_clear) {
    00670     CommandCost ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00671     if (ret.Failed()) return ret;
    00672     cost.AddCost(ret);
    00673   }
    00674
    00675   if (other_bits != pieces) {
    00676     /* Check the foundation/slopes when adding road/tram bits */
    00677     CommandCost ret = CheckRoadSlope(tileh, &pieces, existing, other_bits);
    00678     /* Return an error if we need to build a foundation (ret != 0) but the
    00679      * current setting is turned off */
    00680     if (ret.Failed() || (ret.GetCost() != 0 && !_settings_game.construction.build_on_slopes)) {
    00681       return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00682     }
    00683     cost.AddCost(ret);
    00684   }
    00685
    00686   if (!need_to_clear) {
    00687     if (IsTileType(tile, MP_ROAD)) {
    00688       /* Don't put the pieces that already exist */
    00689       pieces &= ComplementRoadBits(existing);
    00690
    00691       /* Check if new road bits will have the same foundation as other existing road types */
    00692       if (IsNormalRoad(tile)) {
    00693         Slope slope = GetTileSlope(tile);
    00694         Foundation found_new = GetRoadFoundation(slope, pieces | existing);
    00695
    00696         /* Test if all other roadtypes can be built at that foundation */
    00697         for (RoadType rtest = ROADTYPE_ROAD; rtest < ROADTYPE_END; rtest++) {
    00698           if (rtest != rt) { // check only other road types
    00699             RoadBits bits = GetRoadBits(tile, rtest);
    00700             /* do not check if there are not road bits of given type */
    00701             if (bits != ROAD_NONE && GetRoadFoundation(slope, bits) != found_new) {
    00702               return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00703             }
    00704           }
    00705         }
    00706       }
    00707     }
    00708
    00709     CommandCost ret = EnsureNoVehicleOnGround(tile);
    00710     if (ret.Failed()) return ret;
    00711
    00712   }
    00713
    00714   uint num_pieces = (!need_to_clear && IsTileType(tile, MP_TUNNELBRIDGE)) ?
    00715       /* There are 2 pieces on *every* tile of the bridge or tunnel */
    00716       2 * (GetTunnelBridgeLength(GetOtherTunnelBridgeEnd(tile), tile) + 2) :
    00717       /* Count pieces */
    00718       CountBits(pieces);
    00719
    00720   cost.AddCost(num_pieces * _price[PR_BUILD_ROAD]);
    00721
    00722   if (flags & DC_EXEC) {
    00723     switch (GetTileType(tile)) {
    00724       case MP_ROAD: {
    00725         RoadTileType rtt = GetRoadTileType(tile);
    00726         if (existing == ROAD_NONE || rtt == ROAD_TILE_CROSSING) {
    00727           SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
    00728           SetRoadOwner(tile, rt, company);
    00729           if (rt == ROADTYPE_ROAD) SetTownIndex(tile, p2);
    00730         }
    00731         if (rtt != ROAD_TILE_CROSSING) SetRoadBits(tile, existing | pieces, rt);
    00732         break;
    00733       }
    00734
    00735       case MP_TUNNELBRIDGE: {
    00736         TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
    00737
    00738         SetRoadTypes(other_end, GetRoadTypes(other_end) | RoadTypeToRoadTypes(rt));
    00739         SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
    00740         SetRoadOwner(other_end, rt, company);
    00741         SetRoadOwner(tile, rt, company);
    00742
    00743         /* Mark tiles dirty that have been repaved */
    00744         MarkTileDirtyByTile(other_end);
    00745         MarkTileDirtyByTile(tile);
    00746         if (IsBridge(tile)) {
    00747           TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
    00748
    00749           for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
    00750         }
    00751         break;
    00752       }
    00753
    00754       case MP_STATION:
    00755         assert(IsDriveThroughStopTile(tile));
    00756         SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
    00757         SetRoadOwner(tile, rt, company);
    00758         break;
    00759
    00760       default:
    00761         MakeRoadNormal(tile, pieces, RoadTypeToRoadTypes(rt), p2, company, company);
    00762         break;
    00763     }
    00764
    00765     /* Update company infrastructure count. */
    00766     Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
    00767     if (c != NULL) {
    00768       if (IsTileType(tile, MP_TUNNELBRIDGE)) num_pieces *= TUNNELBRIDGE_TRACKBIT_FACTOR;
    00769       c->infrastructure.road[rt] += num_pieces;
    00770       DirtyCompanyInfrastructureWindows(c->index);
    00771     }
    00772
    00773     if (rt != ROADTYPE_TRAM && IsNormalRoadTile(tile)) {
    00774       existing |= pieces;
    00775       SetDisallowedRoadDirections(tile, IsStraightRoad(existing) ?
    00776           GetDisallowedRoadDirections(tile) ^ toggle_drd : DRD_NONE);
    00777     }
    00778
    00779     MarkTileDirtyByTile(tile);
    00780   }
    00781   return cost;
    00782 }
    00783
    00799 CommandCost CmdBuildLongRoad(TileIndex start_tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00800 {
    00801   DisallowedRoadDirections drd = DRD_NORTHBOUND;
    00802
    00803   if (p1 >= MapSize()) return CMD_ERROR;
    00804
    00805   TileIndex end_tile = p1;
    00806   RoadType rt = Extract<RoadType, 3, 2>(p2);
    00807   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
    00808
    00809   Axis axis = Extract<Axis, 2, 1>(p2);
    00810   /* Only drag in X or Y direction dictated by the direction variable */
    00811   if (axis == AXIS_X && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
    00812   if (axis == AXIS_Y && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
    00813
    00814   DiagDirection dir = AxisToDiagDir(axis);
    00815
    00816   /* Swap direction, also the half-tile drag var (bit 0 and 1) */
    00817   if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
    00818     dir = ReverseDiagDir(dir);
    00819     p2 ^= 3;
    00820     drd = DRD_SOUTHBOUND;
    00821   }
    00822
    00823   /* On the X-axis, we have to swap the initial bits, so they
    00824    * will be interpreted correctly in the GTTS. Furthermore
    00825    * when you just 'click' on one tile to build them. */
    00826   if ((axis == AXIS_Y) == (start_tile == end_tile && HasBit(p2, 0) == HasBit(p2, 1))) drd ^= DRD_BOTH;
    00827   /* No disallowed direction bits have to be toggled */
    00828   if (!HasBit(p2, 5)) drd = DRD_NONE;
    00829
    00830   CommandCost cost(EXPENSES_CONSTRUCTION);
    00831   CommandCost last_error = CMD_ERROR;
    00832   TileIndex tile = start_tile;
    00833   bool had_bridge = false;
    00834   bool had_tunnel = false;
    00835   bool had_success = false;
    00836   /* Start tile is the first tile clicked by the user. */
    00837   for (;;) {
    00838     RoadBits bits = AxisToRoadBits(axis);
    00839
    00840     /* Road parts only have to be built at the start tile or at the end tile. */
    00841     if (tile == end_tile && !HasBit(p2, 1)) bits &= DiagDirToRoadBits(ReverseDiagDir(dir));
    00842     if (tile == start_tile && HasBit(p2, 0)) bits &= DiagDirToRoadBits(dir);
    00843
    00844     CommandCost ret = DoCommand(tile, drd << 6 | rt << 4 | bits, 0, flags, CMD_BUILD_ROAD);
    00845     if (ret.Failed()) {
    00846       last_error = ret;
    00847       if (last_error.GetErrorMessage() != STR_ERROR_ALREADY_BUILT) {
    00848         if (HasBit(p2, 6)) return last_error;
    00849         break;
    00850       }
    00851     } else {
    00852       had_success = true;
    00853       /* Only pay for the upgrade on one side of the bridges and tunnels */
    00854       if (IsTileType(tile, MP_TUNNELBRIDGE)) {
    00855         if (IsBridge(tile)) {
    00856           if (!had_bridge || GetTunnelBridgeDirection(tile) == dir) {
    00857             cost.AddCost(ret);
    00858           }
    00859           had_bridge = true;
    00860         } else { // IsTunnel(tile)
    00861           if (!had_tunnel || GetTunnelBridgeDirection(tile) == dir) {
    00862             cost.AddCost(ret);
    00863           }
    00864           had_tunnel = true;
    00865         }
    00866       } else {
    00867         cost.AddCost(ret);
    00868       }
    00869     }
    00870
    00871     if (tile == end_tile) break;
    00872
    00873     tile += TileOffsByDiagDir(dir);
    00874   }
    00875
    00876   return had_success ? cost : last_error;
    00877 }
    00878
    00892 CommandCost CmdRemoveLongRoad(TileIndex start_tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00893 {
    00894   CommandCost cost(EXPENSES_CONSTRUCTION);
    00895
    00896   if (p1 >= MapSize()) return CMD_ERROR;
    00897
    00898   TileIndex end_tile = p1;
    00899   RoadType rt = Extract<RoadType, 3, 2>(p2);
    00900   if (!IsValidRoadType(rt)) return CMD_ERROR;
    00901
    00902   Axis axis = Extract<Axis, 2, 1>(p2);
    00903   /* Only drag in X or Y direction dictated by the direction variable */
    00904   if (axis == AXIS_X && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
    00905   if (axis == AXIS_Y && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
    00906
    00907   /* Swap start and ending tile, also the half-tile drag var (bit 0 and 1) */
    00908   if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
    00909     TileIndex t = start_tile;
    00910     start_tile = end_tile;
    00911     end_tile = t;
    00912     p2 ^= IsInsideMM(p2 & 3, 1, 3) ? 3 : 0;
    00913   }
    00914
    00915   Money money = GetAvailableMoneyForCommand();
    00916   TileIndex tile = start_tile;
    00917   CommandCost last_error = CMD_ERROR;
    00918   bool had_success = false;
    00919   /* Start tile is the small number. */
    00920   for (;;) {
    00921     RoadBits bits = AxisToRoadBits(axis);
    00922
    00923     if (tile == end_tile && !HasBit(p2, 1)) bits &= ROAD_NW | ROAD_NE;
    00924     if (tile == start_tile && HasBit(p2, 0)) bits &= ROAD_SE | ROAD_SW;
    00925
    00926     /* try to remove the halves. */
    00927     if (bits != 0) {
    00928       CommandCost ret = RemoveRoad(tile, flags & ~DC_EXEC, bits, rt, true);
    00929       if (ret.Succeeded()) {
    00930         if (flags & DC_EXEC) {
    00931           money -= ret.GetCost();
    00932           if (money < 0) {
    00933             _additional_cash_required = DoCommand(start_tile, end_tile, p2, flags & ~DC_EXEC, CMD_REMOVE_LONG_ROAD).GetCost();
    00934             return cost;
    00935           }
    00936           RemoveRoad(tile, flags, bits, rt, true, false);
    00937         }
    00938         cost.AddCost(ret);
    00939         had_success = true;
    00940       } else {
    00941         /* Ownership errors are more important. */
    00942         if (last_error.GetErrorMessage() != STR_ERROR_OWNED_BY) last_error = ret;
    00943       }
    00944     }
    00945
    00946     if (tile == end_tile) break;
    00947
    00948     tile += (axis == AXIS_Y) ? TileDiffXY(0, 1) : TileDiffXY(1, 0);
    00949   }
    00950
    00951   return had_success ? cost : last_error;
    00952 }
    00953
    00967 CommandCost CmdBuildRoadDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00968 {
    00969   DiagDirection dir = Extract<DiagDirection, 0, 2>(p1);
    00970   RoadType rt = Extract<RoadType, 2, 2>(p1);
    00971
    00972   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
    00973
    00974   Slope tileh = GetTileSlope(tile);
    00975   if (tileh != SLOPE_FLAT && (
    00976         !_settings_game.construction.build_on_slopes ||
    00977         !CanBuildDepotByTileh(dir, tileh)
    00978       )) {
    00979     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00980   }
    00981
    00982   CommandCost cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00983   if (cost.Failed()) return cost;
    00984
    00985   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    00986
    00987   if (!Depot::CanAllocateItem()) return CMD_ERROR;
    00988
    00989   if (flags & DC_EXEC) {
    00990     Depot *dep = new Depot(tile);
    00991     dep->build_date = _date;
    00992
    00993     /* A road depot has two road bits. */
    00994     Company::Get(_current_company)->infrastructure.road[rt] += 2;
    00995     DirtyCompanyInfrastructureWindows(_current_company);
    00996
    00997     MakeRoadDepot(tile, _current_company, dep->index, dir, rt);
    00998     MarkTileDirtyByTile(tile);
    00999     MakeDefaultName(dep);
    01000   }
    01001   cost.AddCost(_price[PR_BUILD_DEPOT_ROAD]);
    01002   return cost;
    01003 }
    01004
    01005 static CommandCost RemoveRoadDepot(TileIndex tile, DoCommandFlag flags)
    01006 {
    01007   if (_current_company != OWNER_WATER) {
    01008     CommandCost ret = CheckTileOwnership(tile);
    01009     if (ret.Failed()) return ret;
    01010   }
    01011
    01012   CommandCost ret = EnsureNoVehicleOnGround(tile);
    01013   if (ret.Failed()) return ret;
    01014
    01015   if (flags & DC_EXEC) {
    01016     Company *c = Company::GetIfValid(GetTileOwner(tile));
    01017     if (c != NULL) {
    01018       /* A road depot has two road bits. */
    01019       c->infrastructure.road[FIND_FIRST_BIT(GetRoadTypes(tile))] -= 2;
    01020       DirtyCompanyInfrastructureWindows(c->index);
    01021     }
    01022
    01023     delete Depot::GetByTile(tile);
    01024     DoClearSquare(tile);
    01025   }
    01026
    01027   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_DEPOT_ROAD]);
    01028 }
    01029
    01030 static CommandCost ClearTile_Road(TileIndex tile, DoCommandFlag flags)
    01031 {
    01032   switch (GetRoadTileType(tile)) {
    01033     case ROAD_TILE_NORMAL: {
    01034       RoadBits b = GetAllRoadBits(tile);
    01035
    01036       /* Clear the road if only one piece is on the tile OR we are not using the DC_AUTO flag */
    01037       if ((HasExactlyOneBit(b) && GetRoadBits(tile, ROADTYPE_TRAM) == ROAD_NONE) || !(flags & DC_AUTO)) {
    01038         CommandCost ret(EXPENSES_CONSTRUCTION);
    01039         RoadType rt;
    01040         FOR_EACH_SET_ROADTYPE(rt, GetRoadTypes(tile)) {
    01041           CommandCost tmp_ret = RemoveRoad(tile, flags, GetRoadBits(tile, rt), rt, true);
    01042           if (tmp_ret.Failed()) return tmp_ret;
    01043           ret.AddCost(tmp_ret);
    01044         }
    01045         return ret;
    01046       }
    01047       return_cmd_error(STR_ERROR_MUST_REMOVE_ROAD_FIRST);
    01048     }
    01049
    01050     case ROAD_TILE_CROSSING: {
    01051       RoadTypes rts = GetRoadTypes(tile);
    01052       CommandCost ret(EXPENSES_CONSTRUCTION);
    01053
    01054       if (flags & DC_AUTO) return_cmd_error(STR_ERROR_MUST_REMOVE_ROAD_FIRST);
    01055
    01056       /* Must iterate over the roadtypes in a reverse manner because
    01057        * tram tracks must be removed before the road bits. */
    01058       RoadType rt = ROADTYPE_TRAM;
    01059       do {
    01060         if (HasBit(rts, rt)) {
    01061           CommandCost tmp_ret = RemoveRoad(tile, flags, GetCrossingRoadBits(tile), rt, false);
    01062           if (tmp_ret.Failed()) return tmp_ret;
    01063           ret.AddCost(tmp_ret);
    01064         }
    01065       } while (rt-- != ROADTYPE_ROAD);
    01066
    01067       if (flags & DC_EXEC) {
    01068         DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    01069       }
    01070       return ret;
    01071     }
    01072
    01073     default:
    01074     case ROAD_TILE_DEPOT:
    01075       if (flags & DC_AUTO) {
    01076         return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
    01077       }
    01078       return RemoveRoadDepot(tile, flags);
    01079   }
    01080 }
    01081
    01082
    01083 struct DrawRoadTileStruct {
    01084   uint16 image;
    01085   byte subcoord_x;
    01086   byte subcoord_y;
    01087 };
    01088
    01089 #include "table/road_land.h"
    01090
    01098 static Foundation GetRoadFoundation(Slope tileh, RoadBits bits)
    01099 {
    01100   /* Flat land and land without a road doesn't require a foundation */
    01101   if (tileh == SLOPE_FLAT || bits == ROAD_NONE) return FOUNDATION_NONE;
    01102
    01103   /* Steep slopes behave the same as slopes with one corner raised. */
    01104   if (IsSteepSlope(tileh)) {
    01105     tileh = SlopeWithOneCornerRaised(GetHighestSlopeCorner(tileh));
    01106   }
    01107
    01108   /* Leveled RoadBits on a slope */
    01109   if ((_invalid_tileh_slopes_road[0][tileh] & bits) == ROAD_NONE) return FOUNDATION_LEVELED;
    01110
    01111   /* Straight roads without foundation on a slope */
    01112   if (!IsSlopeWithOneCornerRaised(tileh) &&
    01113       (_invalid_tileh_slopes_road[1][tileh] & bits) == ROAD_NONE)
    01114     return FOUNDATION_NONE;
    01115
    01116   /* Roads on steep Slopes or on Slopes with one corner raised */
    01117   return (bits == ROAD_X ? FOUNDATION_INCLINED_X : FOUNDATION_INCLINED_Y);
    01118 }
    01119
    01120 const byte _road_sloped_sprites[14] = {
    01121   0,  0,  2,  0,
    01122   0,  1,  0,  0,
    01123   3,  0,  0,  0,
    01124   0,  0
    01125 };
    01126
    01137 static bool AlwaysDrawUnpavedRoads(TileIndex tile, Roadside roadside)
    01138 {
    01139   return (IsOnSnow(tile) &&
    01140       !(_settings_game.game_creation.landscape == LT_TROPIC && HasGrfMiscBit(GMB_DESERT_PAVED_ROADS) &&
    01141         roadside != ROADSIDE_BARREN && roadside != ROADSIDE_GRASS && roadside != ROADSIDE_GRASS_ROAD_WORKS));
    01142 }
    01143
    01149 void DrawTramCatenary(const TileInfo *ti, RoadBits tram)
    01150 {
    01151   /* Do not draw catenary if it is invisible */
    01152   if (IsInvisibilitySet(TO_CATENARY)) return;
    01153
    01154   /* Don't draw the catenary under a low bridge */
    01155   if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && !IsTransparencySet(TO_CATENARY)) {
    01156     int height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
    01157
    01158     if (height <= GetTileMaxZ(ti->tile) + 1) return;
    01159   }
    01160
    01161   SpriteID front;
    01162   SpriteID back;
    01163
    01164   if (ti->tileh != SLOPE_FLAT) {
    01165     back  = SPR_TRAMWAY_BACK_WIRES_SLOPED  + _road_sloped_sprites[ti->tileh - 1];
    01166     front = SPR_TRAMWAY_FRONT_WIRES_SLOPED + _road_sloped_sprites[ti->tileh - 1];
    01167   } else {
    01168     back  = SPR_TRAMWAY_BASE + _road_backpole_sprites_1[tram];
    01169     front = SPR_TRAMWAY_BASE + _road_frontwire_sprites_1[tram];
    01170   }
    01171
    01172   AddSortableSpriteToDraw(back,  PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
    01173   AddSortableSpriteToDraw(front, PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
    01174 }
    01175
    01184 static void DrawRoadDetail(SpriteID img, const TileInfo *ti, int dx, int dy, int h)
    01185 {
    01186   int x = ti->x | dx;
    01187   int y = ti->y | dy;
    01188   int z = ti->z;
    01189   if (ti->tileh != SLOPE_FLAT) z = GetSlopePixelZ(x, y);
    01190   AddSortableSpriteToDraw(img, PAL_NONE, x, y, 2, 2, h, z);
    01191 }
    01192
    01197 static void DrawRoadBits(TileInfo *ti)
    01198 {
    01199   RoadBits road = GetRoadBits(ti->tile, ROADTYPE_ROAD);
    01200   RoadBits tram = GetRoadBits(ti->tile, ROADTYPE_TRAM);
    01201
    01202   SpriteID image = 0;
    01203   PaletteID pal = PAL_NONE;
    01204
    01205   if (ti->tileh != SLOPE_FLAT) {
    01206     DrawFoundation(ti, GetRoadFoundation(ti->tileh, road | tram));
    01207
    01208     /* DrawFoundation() modifies ti.
    01209      * Default sloped sprites.. */
    01210     if (ti->tileh != SLOPE_FLAT) image = _road_sloped_sprites[ti->tileh - 1] + SPR_ROAD_SLOPE_START;
    01211   }
    01212
    01213   if (image == 0) image = _road_tile_sprites_1[road != ROAD_NONE ? road : tram];
    01214
    01215   Roadside roadside = GetRoadside(ti->tile);
    01216
    01217   if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
    01218     image += 19;
    01219   } else {
    01220     switch (roadside) {
    01221       case ROADSIDE_BARREN:           pal = PALETTE_TO_BARE_LAND; break;
    01222       case ROADSIDE_GRASS:            break;
    01223       case ROADSIDE_GRASS_ROAD_WORKS: break;
    01224       default:                        image -= 19; break; // Paved
    01225     }
    01226   }
    01227
    01228   DrawGroundSprite(image, pal);
    01229
    01230   /* For tram we overlay the road graphics with either tram tracks only
    01231    * (when there is actual road beneath the trams) or with tram tracks
    01232    * and some dirts which hides the road graphics */
    01233   if (tram != ROAD_NONE) {
    01234     if (ti->tileh != SLOPE_FLAT) {
    01235       image = _road_sloped_sprites[ti->tileh - 1] + SPR_TRAMWAY_SLOPED_OFFSET;
    01236     } else {
    01237       image = _road_tile_sprites_1[tram] - SPR_ROAD_Y;
    01238     }
    01239     image += (road == ROAD_NONE) ? SPR_TRAMWAY_TRAM : SPR_TRAMWAY_OVERLAY;
    01240     DrawGroundSprite(image, pal);
    01241   }
    01242
    01243   if (road != ROAD_NONE) {
    01244     DisallowedRoadDirections drd = GetDisallowedRoadDirections(ti->tile);
    01245     if (drd != DRD_NONE) {
    01246       DrawGroundSpriteAt(SPR_ONEWAY_BASE + drd - 1 + ((road == ROAD_X) ? 0 : 3), PAL_NONE, 8, 8, GetPartialPixelZ(8, 8, ti->tileh));
    01247     }
    01248   }
    01249
    01250   if (HasRoadWorks(ti->tile)) {
    01251     /* Road works */
    01252     DrawGroundSprite((road | tram) & ROAD_X ? SPR_EXCAVATION_X : SPR_EXCAVATION_Y, PAL_NONE);
    01253     return;
    01254   }
    01255
    01256   if (tram != ROAD_NONE) DrawTramCatenary(ti, tram);
    01257
    01258   /* Return if full detail is disabled, or we are zoomed fully out. */
    01259   if (!HasBit(_display_opt, DO_FULL_DETAIL) || _cur_dpi->zoom > ZOOM_LVL_DETAIL) return;
    01260
    01261   /* Do not draw details (street lights, trees) under low bridge */
    01262   if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && (roadside == ROADSIDE_TREES || roadside == ROADSIDE_STREET_LIGHTS)) {
    01263     int height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
    01264     int minz = GetTileMaxZ(ti->tile) + 2;
    01265
    01266     if (roadside == ROADSIDE_TREES) minz++;
    01267
    01268     if (height < minz) return;
    01269   }
    01270
    01271   /* If there are no road bits, return, as there is nothing left to do */
    01272   if (HasAtMostOneBit(road)) return;
    01273
    01274   /* Draw extra details. */
    01275   for (const DrawRoadTileStruct *drts = _road_display_table[roadside][road | tram]; drts->image != 0; drts++) {
    01276     DrawRoadDetail(drts->image, ti, drts->subcoord_x, drts->subcoord_y, 0x10);
    01277   }
    01278 }
    01279
    01281 static void DrawTile_Road(TileInfo *ti)
    01282 {
    01283   switch (GetRoadTileType(ti->tile)) {
    01284     case ROAD_TILE_NORMAL:
    01285       DrawRoadBits(ti);
    01286       break;
    01287
    01288     case ROAD_TILE_CROSSING: {
    01289       if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
    01290
    01291       PaletteID pal = PAL_NONE;
    01292       const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
    01293
    01294       if (rti->UsesOverlay()) {
    01295         Axis axis = GetCrossingRailAxis(ti->tile);
    01296         SpriteID road = SPR_ROAD_Y + axis;
    01297
    01298         Roadside roadside = GetRoadside(ti->tile);
    01299
    01300         if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
    01301           road += 19;
    01302         } else {
    01303           switch (roadside) {
    01304             case ROADSIDE_BARREN: pal = PALETTE_TO_BARE_LAND; break;
    01305             case ROADSIDE_GRASS:  break;
    01306             default:              road -= 19; break; // Paved
    01307           }
    01308         }
    01309
    01310         DrawGroundSprite(road, pal);
    01311
    01312         SpriteID rail = GetCustomRailSprite(rti, ti->tile, RTSG_CROSSING) + axis;
    01313         /* Draw tracks, but draw PBS reserved tracks darker. */
    01314         pal = (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasCrossingReservation(ti->tile)) ? PALETTE_CRASH : PAL_NONE;
    01315         DrawGroundSprite(rail, pal);
    01316
    01317         DrawRailTileSeq(ti, &_crossing_layout, TO_CATENARY, rail, 0, PAL_NONE);
    01318       } else {
    01319         SpriteID image = rti->base_sprites.crossing;
    01320
    01321         if (GetCrossingRoadAxis(ti->tile) == AXIS_X) image++;
    01322         if (IsCrossingBarred(ti->tile)) image += 2;
    01323
    01324         Roadside roadside = GetRoadside(ti->tile);
    01325
    01326         if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
    01327           image += 8;
    01328         } else {
    01329           switch (roadside) {
    01330             case ROADSIDE_BARREN: pal = PALETTE_TO_BARE_LAND; break;
    01331             case ROADSIDE_GRASS:  break;
    01332             default:              image += 4; break; // Paved
    01333           }
    01334         }
    01335
    01336         DrawGroundSprite(image, pal);
    01337
    01338         /* PBS debugging, draw reserved tracks darker */
    01339         if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasCrossingReservation(ti->tile)) {
    01340           DrawGroundSprite(GetCrossingRoadAxis(ti->tile) == AXIS_Y ? GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_x : GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_y, PALETTE_CRASH);
    01341         }
    01342       }
    01343
    01344       if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
    01345         DrawGroundSprite(SPR_TRAMWAY_OVERLAY + (GetCrossingRoadAxis(ti->tile) ^ 1), pal);
    01346         DrawTramCatenary(ti, GetCrossingRoadBits(ti->tile));
    01347       }
    01348       if (HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
    01349       break;
    01350     }
    01351
    01352     default:
    01353     case ROAD_TILE_DEPOT: {
    01354       if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
    01355
    01356       PaletteID palette = COMPANY_SPRITE_COLOUR(GetTileOwner(ti->tile));
    01357
    01358       const DrawTileSprites *dts;
    01359       if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
    01360         dts =  &_tram_depot[GetRoadDepotDirection(ti->tile)];
    01361       } else {
    01362         dts =  &_road_depot[GetRoadDepotDirection(ti->tile)];
    01363       }
    01364
    01365       DrawGroundSprite(dts->ground.sprite, PAL_NONE);
    01366       DrawOrigTileSeq(ti, dts, TO_BUILDINGS, palette);
    01367       break;
    01368     }
    01369   }
    01370   DrawBridgeMiddle(ti);
    01371 }
    01372
    01380 void DrawRoadDepotSprite(int x, int y, DiagDirection dir, RoadType rt)
    01381 {
    01382   PaletteID palette = COMPANY_SPRITE_COLOUR(_local_company);
    01383   const DrawTileSprites *dts = (rt == ROADTYPE_TRAM) ? &_tram_depot[dir] : &_road_depot[dir];
    01384
    01385   x += 33;
    01386   y += 17;
    01387
    01388   DrawSprite(dts->ground.sprite, PAL_NONE, x, y);
    01389   DrawOrigTileSeqInGUI(x, y, dts, palette);
    01390 }
    01391
    01397 void UpdateNearestTownForRoadTiles(bool invalidate)
    01398 {
    01399   assert(!invalidate || _generating_world);
    01400
    01401   for (TileIndex t = 0; t < MapSize(); t++) {
    01402     if (IsTileType(t, MP_ROAD) && !IsRoadDepot(t) && !HasTownOwnedRoad(t)) {
    01403       TownID tid = (TownID)INVALID_TOWN;
    01404       if (!invalidate) {
    01405         const Town *town = CalcClosestTownFromTile(t);
    01406         if (town != NULL) tid = town->index;
    01407       }
    01408       SetTownIndex(t, tid);
    01409     }
    01410   }
    01411 }
    01412
    01413 static int GetSlopePixelZ_Road(TileIndex tile, uint x, uint y)
    01414 {
    01415
    01416   if (IsNormalRoad(tile)) {
    01417     int z;
    01418     Slope tileh = GetTilePixelSlope(tile, &z);
    01419     if (tileh == SLOPE_FLAT) return z;
    01420
    01421     Foundation f = GetRoadFoundation(tileh, GetAllRoadBits(tile));
    01422     z += ApplyPixelFoundationToSlope(f, &tileh);
    01423     return z + GetPartialPixelZ(x & 0xF, y & 0xF, tileh);
    01424   } else {
    01425     return GetTileMaxPixelZ(tile);
    01426   }
    01427 }
    01428
    01429 static Foundation GetFoundation_Road(TileIndex tile, Slope tileh)
    01430 {
    01431   if (IsNormalRoad(tile)) {
    01432     return GetRoadFoundation(tileh, GetAllRoadBits(tile));
    01433   } else {
    01434     return FlatteningFoundation(tileh);
    01435   }
    01436 }
    01437
    01438 static const Roadside _town_road_types[][2] = {
    01439   { ROADSIDE_GRASS,         ROADSIDE_GRASS },
    01440   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
    01441   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
    01442   { ROADSIDE_TREES,         ROADSIDE_TREES },
    01443   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
    01444 };
    01445
    01446 static const Roadside _town_road_types_2[][2] = {
    01447   { ROADSIDE_GRASS,         ROADSIDE_GRASS },
    01448   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
    01449   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
    01450   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
    01451   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
    01452 };
    01453
    01454
    01455 static void TileLoop_Road(TileIndex tile)
    01456 {
    01457   switch (_settings_game.game_creation.landscape) {
    01458     case LT_ARCTIC:
    01459       if (IsOnSnow(tile) != (GetTileZ(tile) > GetSnowLine())) {
    01460         ToggleSnow(tile);
    01461         MarkTileDirtyByTile(tile);
    01462       }
    01463       break;
    01464
    01465     case LT_TROPIC:
    01466       if (GetTropicZone(tile) == TROPICZONE_DESERT && !IsOnDesert(tile)) {
    01467         ToggleDesert(tile);
    01468         MarkTileDirtyByTile(tile);
    01469       }
    01470       break;
    01471   }
    01472
    01473   if (IsRoadDepot(tile)) return;
    01474
    01475   const Town *t = ClosestTownFromTile(tile, UINT_MAX);
    01476   if (!HasRoadWorks(tile)) {
    01477     HouseZonesBits grp = HZB_TOWN_EDGE;
    01478
    01479     if (t != NULL) {
    01480       grp = GetTownRadiusGroup(t, tile);
    01481
    01482       /* Show an animation to indicate road work */
    01483       if (t->road_build_months != 0 &&
    01484           (DistanceManhattan(t->xy, tile) < 8 || grp != HZB_TOWN_EDGE) &&
    01485           IsNormalRoad(tile) && !HasAtMostOneBit(GetAllRoadBits(tile))) {
    01486         if (GetFoundationSlope(tile) == SLOPE_FLAT && EnsureNoVehicleOnGround(tile).Succeeded() && Chance16(1, 40)) {
    01487           StartRoadWorks(tile);
    01488
    01489           SndPlayTileFx(SND_21_JACKHAMMER, tile);
    01490           CreateEffectVehicleAbove(
    01491             TileX(tile) * TILE_SIZE + 7,
    01492             TileY(tile) * TILE_SIZE + 7,
    01493             0,
    01494             EV_BULLDOZER);
    01495           MarkTileDirtyByTile(tile);
    01496           return;
    01497         }
    01498       }
    01499     }
    01500
    01501     {
    01502       /* Adjust road ground type depending on 'grp' (grp is the distance to the center) */
    01503       const Roadside *new_rs = (_settings_game.game_creation.landscape == LT_TOYLAND) ? _town_road_types_2[grp] : _town_road_types[grp];
    01504       Roadside cur_rs = GetRoadside(tile);
    01505
    01506       /* We have our desired type, do nothing */
    01507       if (cur_rs == new_rs[0]) return;
    01508
    01509       /* We have the pre-type of the desired type, switch to the desired type */
    01510       if (cur_rs == new_rs[1]) {
    01511         cur_rs = new_rs[0];
    01512       /* We have barren land, install the pre-type */
    01513       } else if (cur_rs == ROADSIDE_BARREN) {
    01514         cur_rs = new_rs[1];
    01515       /* We're totally off limits, remove any installation and make barren land */
    01516       } else {
    01517         cur_rs = ROADSIDE_BARREN;
    01518       }
    01519       SetRoadside(tile, cur_rs);
    01520       MarkTileDirtyByTile(tile);
    01521     }
    01522   } else if (IncreaseRoadWorksCounter(tile)) {
    01523     TerminateRoadWorks(tile);
    01524
    01525     if (_settings_game.economy.mod_road_rebuild) {
    01526       /* Generate a nicer town surface */
    01527       const RoadBits old_rb = GetAnyRoadBits(tile, ROADTYPE_ROAD);
    01528       const RoadBits new_rb = CleanUpRoadBits(tile, old_rb);
    01529
    01530       if (old_rb != new_rb) {
    01531         RemoveRoad(tile, DC_EXEC | DC_AUTO | DC_NO_WATER, (old_rb ^ new_rb), ROADTYPE_ROAD, true);
    01532       }
    01533     }
    01534
    01535     MarkTileDirtyByTile(tile);
    01536   }
    01537 }
    01538
    01539 static bool ClickTile_Road(TileIndex tile)
    01540 {
    01541   if (!IsRoadDepot(tile)) return false;
    01542
    01543   ShowDepotWindow(tile, VEH_ROAD);
    01544   return true;
    01545 }
    01546
    01547 /* Converts RoadBits to TrackBits */
    01548 static const TrackBits _road_trackbits[16] = {
    01549   TRACK_BIT_NONE,                                  // ROAD_NONE
    01550   TRACK_BIT_NONE,                                  // ROAD_NW
    01551   TRACK_BIT_NONE,                                  // ROAD_SW
    01552   TRACK_BIT_LEFT,                                  // ROAD_W
    01553   TRACK_BIT_NONE,                                  // ROAD_SE
    01554   TRACK_BIT_Y,                                     // ROAD_Y
    01555   TRACK_BIT_LOWER,                                 // ROAD_S
    01556   TRACK_BIT_LEFT | TRACK_BIT_LOWER | TRACK_BIT_Y,  // ROAD_Y | ROAD_SW
    01557   TRACK_BIT_NONE,                                  // ROAD_NE
    01558   TRACK_BIT_UPPER,                                 // ROAD_N
    01559   TRACK_BIT_X,                                     // ROAD_X
    01560   TRACK_BIT_LEFT | TRACK_BIT_UPPER | TRACK_BIT_X,  // ROAD_X | ROAD_NW
    01561   TRACK_BIT_RIGHT,                                 // ROAD_E
    01562   TRACK_BIT_RIGHT | TRACK_BIT_UPPER | TRACK_BIT_Y, // ROAD_Y | ROAD_NE
    01563   TRACK_BIT_RIGHT | TRACK_BIT_LOWER | TRACK_BIT_X, // ROAD_X | ROAD_SE
    01564   TRACK_BIT_ALL,                                   // ROAD_ALL
    01565 };
    01566
    01567 static TrackStatus GetTileTrackStatus_Road(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
    01568 {
    01569   TrackdirBits trackdirbits = TRACKDIR_BIT_NONE;
    01570   TrackdirBits red_signals = TRACKDIR_BIT_NONE; // crossing barred
    01571   switch (mode) {
    01572     case TRANSPORT_RAIL:
    01573       if (IsLevelCrossing(tile)) trackdirbits = TrackBitsToTrackdirBits(GetCrossingRailBits(tile));
    01574       break;
    01575
    01576     case TRANSPORT_ROAD:
    01577       if ((GetRoadTypes(tile) & sub_mode) == 0) break;
    01578       switch (GetRoadTileType(tile)) {
    01579         case ROAD_TILE_NORMAL: {
    01580           const uint drd_to_multiplier[DRD_END] = { 0x101, 0x100, 0x1, 0x0 };
    01581           RoadType rt = (RoadType)FindFirstBit(sub_mode);
    01582           RoadBits bits = GetRoadBits(tile, rt);
    01583
    01584           /* no roadbit at this side of tile, return 0 */
    01585           if (side != INVALID_DIAGDIR && (DiagDirToRoadBits(side) & bits) == 0) break;
    01586
    01587           uint multiplier = drd_to_multiplier[rt == ROADTYPE_TRAM ? DRD_NONE : GetDisallowedRoadDirections(tile)];
    01588           if (!HasRoadWorks(tile)) trackdirbits = (TrackdirBits)(_road_trackbits[bits] * multiplier);
    01589           break;
    01590         }
    01591
    01592         case ROAD_TILE_CROSSING: {
    01593           Axis axis = GetCrossingRoadAxis(tile);
    01594
    01595           if (side != INVALID_DIAGDIR && axis != DiagDirToAxis(side)) break;
    01596
    01597           trackdirbits = TrackBitsToTrackdirBits(AxisToTrackBits(axis));
    01598           if (IsCrossingBarred(tile)) red_signals = trackdirbits;
    01599           break;
    01600         }
    01601
    01602         default:
    01603         case ROAD_TILE_DEPOT: {
    01604           DiagDirection dir = GetRoadDepotDirection(tile);
    01605
    01606           if (side != INVALID_DIAGDIR && side != dir) break;
    01607
    01608           trackdirbits = TrackBitsToTrackdirBits(DiagDirToDiagTrackBits(dir));
    01609           break;
    01610         }
    01611       }
    01612       break;
    01613
    01614     default: break;
    01615   }
    01616   return CombineTrackStatus(trackdirbits, red_signals);
    01617 }
    01618
    01619 static const StringID _road_tile_strings[] = {
    01620   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01621   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01622   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01623   STR_LAI_ROAD_DESCRIPTION_ROAD_WITH_STREETLIGHTS,
    01624   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01625   STR_LAI_ROAD_DESCRIPTION_TREE_LINED_ROAD,
    01626   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01627   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01628 };
    01629
    01630 static void GetTileDesc_Road(TileIndex tile, TileDesc *td)
    01631 {
    01632   Owner rail_owner = INVALID_OWNER;
    01633   Owner road_owner = INVALID_OWNER;
    01634   Owner tram_owner = INVALID_OWNER;
    01635
    01636   switch (GetRoadTileType(tile)) {
    01637     case ROAD_TILE_CROSSING: {
    01638       td->str = STR_LAI_ROAD_DESCRIPTION_ROAD_RAIL_LEVEL_CROSSING;
    01639       RoadTypes rts = GetRoadTypes(tile);
    01640       rail_owner = GetTileOwner(tile);
    01641       if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    01642       if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
    01643
    01644       const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
    01645       td->rail_speed = rti->max_speed;
    01646
    01647       break;
    01648     }
    01649
    01650     case ROAD_TILE_DEPOT:
    01651       td->str = STR_LAI_ROAD_DESCRIPTION_ROAD_VEHICLE_DEPOT;
    01652       road_owner = GetTileOwner(tile); // Tile has only one owner, roadtype does not matter
    01653       td->build_date = Depot::GetByTile(tile)->build_date;
    01654       break;
    01655
    01656     default: {
    01657       RoadTypes rts = GetRoadTypes(tile);
    01658       td->str = (HasBit(rts, ROADTYPE_ROAD) ? _road_tile_strings[GetRoadside(tile)] : STR_LAI_ROAD_DESCRIPTION_TRAMWAY);
    01659       if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    01660       if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
    01661       break;
    01662     }
    01663   }
    01664
    01665   /* Now we have to discover, if the tile has only one owner or many:
    01666    *   - Find a first_owner of the tile. (Currently road or tram must be present, but this will break when the third type becomes available)
    01667    *   - Compare the found owner with the other owners, and test if they differ.
    01668    * Note: If road exists it will be the first_owner.
    01669    */
    01670   Owner first_owner = (road_owner == INVALID_OWNER ? tram_owner : road_owner);
    01671   bool mixed_owners = (tram_owner != INVALID_OWNER && tram_owner != first_owner) || (rail_owner != INVALID_OWNER && rail_owner != first_owner);
    01672
    01673   if (mixed_owners) {
    01674     /* Multiple owners */
    01675     td->owner_type[0] = (rail_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_RAIL_OWNER);
    01676     td->owner[0] = rail_owner;
    01677     td->owner_type[1] = (road_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_ROAD_OWNER);
    01678     td->owner[1] = road_owner;
    01679     td->owner_type[2] = (tram_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_TRAM_OWNER);
    01680     td->owner[2] = tram_owner;
    01681   } else {
    01682     /* One to rule them all */
    01683     td->owner[0] = first_owner;
    01684   }
    01685 }
    01686
    01691 static const byte _roadveh_enter_depot_dir[4] = {
    01692   TRACKDIR_X_SW, TRACKDIR_Y_NW, TRACKDIR_X_NE, TRACKDIR_Y_SE
    01693 };
    01694
    01695 static VehicleEnterTileStatus VehicleEnter_Road(Vehicle *v, TileIndex tile, int x, int y)
    01696 {
    01697   switch (GetRoadTileType(tile)) {
    01698     case ROAD_TILE_DEPOT: {
    01699       if (v->type != VEH_ROAD) break;
    01700
    01701       RoadVehicle *rv = RoadVehicle::From(v);
    01702       if (rv->frame == RVC_DEPOT_STOP_FRAME &&
    01703           _roadveh_enter_depot_dir[GetRoadDepotDirection(tile)] == rv->state) {
    01704         rv->state = RVSB_IN_DEPOT;
    01705         rv->vehstatus |= VS_HIDDEN;
    01706         rv->direction = ReverseDir(rv->direction);
    01707         if (rv->Next() == NULL) VehicleEnterDepot(rv->First());
    01708         rv->tile = tile;
    01709
    01710         InvalidateWindowData(WC_VEHICLE_DEPOT, rv->tile);
    01711         return VETSB_ENTERED_WORMHOLE;
    01712       }
    01713       break;
    01714     }
    01715
    01716     default: break;
    01717   }
    01718   return VETSB_CONTINUE;
    01719 }
    01720
    01721
    01722 static void ChangeTileOwner_Road(TileIndex tile, Owner old_owner, Owner new_owner)
    01723 {
    01724   if (IsRoadDepot(tile)) {
    01725     if (GetTileOwner(tile) == old_owner) {
    01726       if (new_owner == INVALID_OWNER) {
    01727         DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
    01728       } else {
    01729         /* A road depot has two road bits. No need to dirty windows here, we'll redraw the whole screen anyway. */
    01730         RoadType rt = (RoadType)FIND_FIRST_BIT(GetRoadTypes(tile));
    01731         Company::Get(old_owner)->infrastructure.road[rt] -= 2;
    01732         Company::Get(new_owner)->infrastructure.road[rt] += 2;
    01733
    01734         SetTileOwner(tile, new_owner);
    01735       }
    01736     }
    01737     return;
    01738   }
    01739
    01740   for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
    01741     /* Update all roadtypes, no matter if they are present */
    01742     if (GetRoadOwner(tile, rt) == old_owner) {
    01743       if (HasTileRoadType(tile, rt)) {
    01744         /* A level crossing has two road bits. No need to dirty windows here, we'll redraw the whole screen anyway. */
    01745         uint num_bits = IsLevelCrossing(tile) ? 2 : CountBits(GetRoadBits(tile, rt));
    01746         Company::Get(old_owner)->infrastructure.road[rt] -= num_bits;
    01747         if (new_owner != INVALID_OWNER) Company::Get(new_owner)->infrastructure.road[rt] += num_bits;
    01748       }
    01749
    01750       SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
    01751     }
    01752   }
    01753
    01754   if (IsLevelCrossing(tile)) {
    01755     if (GetTileOwner(tile) == old_owner) {
    01756       if (new_owner == INVALID_OWNER) {
    01757         DoCommand(tile, 0, GetCrossingRailTrack(tile), DC_EXEC | DC_BANKRUPT, CMD_REMOVE_SINGLE_RAIL);
    01758       } else {
    01759         /* Update infrastructure counts. No need to dirty windows here, we'll redraw the whole screen anyway. */
    01760         Company::Get(old_owner)->infrastructure.rail[GetRailType(tile)] -= LEVELCROSSING_TRACKBIT_FACTOR;
    01761         Company::Get(new_owner)->infrastructure.rail[GetRailType(tile)] += LEVELCROSSING_TRACKBIT_FACTOR;
    01762
    01763         SetTileOwner(tile, new_owner);
    01764       }
    01765     }
    01766   }
    01767 }
    01768
    01769 static CommandCost TerraformTile_Road(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
    01770 {
    01771   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
    01772     switch (GetRoadTileType(tile)) {
    01773       case ROAD_TILE_CROSSING:
    01774         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]);
    01775         break;
    01776
    01777       case ROAD_TILE_DEPOT:
    01778         if (AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, GetRoadDepotDirection(tile))) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    01779         break;
    01780
    01781       case ROAD_TILE_NORMAL: {
    01782         RoadBits bits = GetAllRoadBits(tile);
    01783         RoadBits bits_copy = bits;
    01784         /* Check if the slope-road_bits combination is valid at all, i.e. it is safe to call GetRoadFoundation(). */
    01785         if (CheckRoadSlope(tileh_new, &bits_copy, ROAD_NONE, ROAD_NONE).Succeeded()) {
    01786           /* CheckRoadSlope() sometimes changes the road_bits, if it does not agree with them. */
    01787           if (bits == bits_copy) {
    01788             int z_old;
    01789             Slope tileh_old = GetTileSlope(tile, &z_old);
    01790
    01791             /* Get the slope on top of the foundation */
    01792             z_old += ApplyFoundationToSlope(GetRoadFoundation(tileh_old, bits), &tileh_old);
    01793             z_new += ApplyFoundationToSlope(GetRoadFoundation(tileh_new, bits), &tileh_new);
    01794
    01795             /* The surface slope must not be changed */
    01796             if ((z_old == z_new) && (tileh_old == tileh_new)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    01797           }
    01798         }
    01799         break;
    01800       }
    01801
    01802       default: NOT_REACHED();
    01803     }
    01804   }
    01805
    01806   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    01807 }
    01808
    01810 extern const TileTypeProcs _tile_type_road_procs = {
    01811   DrawTile_Road,           // draw_tile_proc
    01812   GetSlopePixelZ_Road,     // get_slope_z_proc
    01813   ClearTile_Road,          // clear_tile_proc
    01814   NULL,                    // add_accepted_cargo_proc
    01815   GetTileDesc_Road,        // get_tile_desc_proc
    01816   GetTileTrackStatus_Road, // get_tile_track_status_proc
    01817   ClickTile_Road,          // click_tile_proc
    01818   NULL,                    // animate_tile_proc
    01819   TileLoop_Road,           // tile_loop_proc
    01820   ChangeTileOwner_Road,    // change_tile_owner_proc
    01821   NULL,                    // add_produced_cargo_proc
    01822   VehicleEnter_Road,       // vehicle_enter_tile_proc
    01823   GetFoundation_Road,      // get_foundation_proc
    01824   TerraformTile_Road,      // terraform_tile_proc
    01825 };