# road_cmd.cpp

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    00001 /* $Id: road_cmd.cpp 24900 2013-01-08 22:46:42Z planetmaker $ */
    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       /* Removing any roadbit in the bridge axis removes the roadtype (that's the behaviour remove-long-roads needs) */
    00220       if ((AxisToRoadBits(DiagDirToAxis(GetTunnelBridgeDirection(tile))) & pieces) == ROAD_NONE) return_cmd_error(rt == ROADTYPE_TRAM ? STR_ERROR_THERE_IS_NO_TRAMWAY : STR_ERROR_THERE_IS_NO_ROAD);
    00221
    00222       TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
    00223       /* Pay for *every* tile of the bridge or tunnel */
    00224       uint len = GetTunnelBridgeLength(other_end, tile) + 2;
    00225       cost.AddCost(len * _price[PR_CLEAR_ROAD]);
    00226       if (flags & DC_EXEC) {
    00227         Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
    00228         if (c != NULL) {
    00229           /* A full diagonal road tile has two road bits. */
    00230           c->infrastructure.road[rt] -= len * 2 * TUNNELBRIDGE_TRACKBIT_FACTOR;
    00231           DirtyCompanyInfrastructureWindows(c->index);
    00232         }
    00233
    00234         SetRoadTypes(other_end, GetRoadTypes(other_end) & ~RoadTypeToRoadTypes(rt));
    00235         SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
    00236
    00237         /* If the owner of the bridge sells all its road, also move the ownership
    00238          * to the owner of the other roadtype. */
    00239         RoadType other_rt = (rt == ROADTYPE_ROAD) ? ROADTYPE_TRAM : ROADTYPE_ROAD;
    00240         Owner other_owner = GetRoadOwner(tile, other_rt);
    00241         if (other_owner != GetTileOwner(tile)) {
    00242           SetTileOwner(tile, other_owner);
    00243           SetTileOwner(other_end, other_owner);
    00244         }
    00245
    00246         /* Mark tiles dirty that have been repaved */
    00247         MarkTileDirtyByTile(tile);
    00248         MarkTileDirtyByTile(other_end);
    00249         if (IsBridge(tile)) {
    00250           TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
    00251
    00252           for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
    00253         }
    00254       }
    00255     } else {
    00256       assert(IsDriveThroughStopTile(tile));
    00257       cost.AddCost(_price[PR_CLEAR_ROAD] * 2);
    00258       if (flags & DC_EXEC) {
    00259         Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
    00260         if (c != NULL) {
    00261           /* A full diagonal road tile has two road bits. */
    00262           c->infrastructure.road[rt] -= 2;
    00263           DirtyCompanyInfrastructureWindows(c->index);
    00264         }
    00265         SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
    00266         MarkTileDirtyByTile(tile);
    00267       }
    00268     }
    00269     return cost;
    00270   }
    00271
    00272   switch (GetRoadTileType(tile)) {
    00273     case ROAD_TILE_NORMAL: {
    00274       Slope tileh = GetTileSlope(tile);
    00275
    00276       /* Steep slopes behave the same as slopes with one corner raised. */
    00277       if (IsSteepSlope(tileh)) {
    00278         tileh = SlopeWithOneCornerRaised(GetHighestSlopeCorner(tileh));
    00279       }
    00280
    00281       RoadBits present = GetRoadBits(tile, rt);
    00282       const RoadBits other = GetOtherRoadBits(tile, rt);
    00283       const Foundation f = GetRoadFoundation(tileh, present);
    00284
    00285       if (HasRoadWorks(tile) && _current_company != OWNER_WATER) return_cmd_error(STR_ERROR_ROAD_WORKS_IN_PROGRESS);
    00286
    00287       /* Autocomplete to a straight road
    00288        * @li if the bits of the other roadtypes result in another foundation
    00289        * @li if build on slopes is disabled */
    00290       if ((IsStraightRoad(other) && (other & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) != ROAD_NONE) ||
    00291           (tileh != SLOPE_FLAT && !_settings_game.construction.build_on_slopes)) {
    00292         pieces |= MirrorRoadBits(pieces);
    00293       }
    00294
    00295       /* limit the bits to delete to the existing bits. */
    00296       pieces &= present;
    00297       if (pieces == ROAD_NONE) return_cmd_error(rt == ROADTYPE_TRAM ? STR_ERROR_THERE_IS_NO_TRAMWAY : STR_ERROR_THERE_IS_NO_ROAD);
    00298
    00299       /* Now set present what it will be after the remove */
    00300       present ^= pieces;
    00301
    00302       /* Check for invalid RoadBit combinations on slopes */
    00303       if (tileh != SLOPE_FLAT && present != ROAD_NONE &&
    00304           (present & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) == present) {
    00305         return CMD_ERROR;
    00306       }
    00307
    00308       if (flags & DC_EXEC) {
    00309         if (HasRoadWorks(tile)) {
    00310           /* flooding tile with road works, don't forget to remove the effect vehicle too */
    00311           assert(_current_company == OWNER_WATER);
    00312           EffectVehicle *v;
    00313           FOR_ALL_EFFECTVEHICLES(v) {
    00314             if (TileVirtXY(v->x_pos, v->y_pos) == tile) {
    00315               delete v;
    00316             }
    00317           }
    00318         }
    00319
    00320         Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
    00321         if (c != NULL) {
    00322           c->infrastructure.road[rt] -= CountBits(pieces);
    00323           DirtyCompanyInfrastructureWindows(c->index);
    00324         }
    00325
    00326         if (present == ROAD_NONE) {
    00327           RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
    00328           if (rts == ROADTYPES_NONE) {
    00329             /* Includes MarkTileDirtyByTile() */
    00330             DoClearSquare(tile);
    00331           } else {
    00332             if (rt == ROADTYPE_ROAD && IsRoadOwner(tile, ROADTYPE_ROAD, OWNER_TOWN)) {
    00333               /* Update nearest-town index */
    00334               const Town *town = CalcClosestTownFromTile(tile);
    00335               SetTownIndex(tile, town == NULL ? (TownID)INVALID_TOWN : town->index);
    00336             }
    00337             SetRoadBits(tile, ROAD_NONE, rt);
    00338             SetRoadTypes(tile, rts);
    00339             MarkTileDirtyByTile(tile);
    00340           }
    00341         } else {
    00342           /* When bits are removed, you *always* end up with something that
    00343            * is not a complete straight road tile. However, trams do not have
    00344            * onewayness, so they cannot remove it either. */
    00345           if (rt != ROADTYPE_TRAM) SetDisallowedRoadDirections(tile, DRD_NONE);
    00346           SetRoadBits(tile, present, rt);
    00347           MarkTileDirtyByTile(tile);
    00348         }
    00349       }
    00350
    00351       CommandCost cost(EXPENSES_CONSTRUCTION, CountBits(pieces) * _price[PR_CLEAR_ROAD]);
    00352       /* If we build a foundation we have to pay for it. */
    00353       if (f == FOUNDATION_NONE && GetRoadFoundation(tileh, present) != FOUNDATION_NONE) cost.AddCost(_price[PR_BUILD_FOUNDATION]);
    00354
    00355       return cost;
    00356     }
    00357
    00358     case ROAD_TILE_CROSSING: {
    00359       if (pieces & ComplementRoadBits(GetCrossingRoadBits(tile))) {
    00360         return CMD_ERROR;
    00361       }
    00362
    00363       /* Don't allow road to be removed from the crossing when there is tram;
    00364        * we can't draw the crossing without roadbits ;) */
    00365       if (rt == ROADTYPE_ROAD && HasTileRoadType(tile, ROADTYPE_TRAM) && (flags & DC_EXEC || crossing_check)) return CMD_ERROR;
    00366
    00367       if (flags & DC_EXEC) {
    00368         Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
    00369         if (c != NULL) {
    00370           /* A full diagonal road tile has two road bits. */
    00371           c->infrastructure.road[rt] -= 2;
    00372           DirtyCompanyInfrastructureWindows(c->index);
    00373         }
    00374
    00375         Track railtrack = GetCrossingRailTrack(tile);
    00376         RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
    00377         if (rts == ROADTYPES_NONE) {
    00378           TrackBits tracks = GetCrossingRailBits(tile);
    00379           bool reserved = HasCrossingReservation(tile);
    00380           MakeRailNormal(tile, GetTileOwner(tile), tracks, GetRailType(tile));
    00381           if (reserved) SetTrackReservation(tile, tracks);
    00382
    00383           /* Update rail count for level crossings. The plain track should still be accounted
    00384            * for, so only subtract the difference to the level crossing cost. */
    00385           c = Company::GetIfValid(GetTileOwner(tile));
    00386           if (c != NULL) c->infrastructure.rail[GetRailType(tile)] -= LEVELCROSSING_TRACKBIT_FACTOR - 1;
    00387         } else {
    00388           SetRoadTypes(tile, rts);
    00389         }
    00390         MarkTileDirtyByTile(tile);
    00391         YapfNotifyTrackLayoutChange(tile, railtrack);
    00392       }
    00393       return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_ROAD] * 2);
    00394     }
    00395
    00396     default:
    00397     case ROAD_TILE_DEPOT:
    00398       return CMD_ERROR;
    00399   }
    00400 }
    00401
    00402
    00414 static CommandCost CheckRoadSlope(Slope tileh, RoadBits *pieces, RoadBits existing, RoadBits other)
    00415 {
    00416   /* Remove already build pieces */
    00417   CLRBITS(*pieces, existing);
    00418
    00419   /* If we can't build anything stop here */
    00420   if (*pieces == ROAD_NONE) return CMD_ERROR;
    00421
    00422   /* All RoadBit combos are valid on flat land */
    00423   if (tileh == SLOPE_FLAT) return CommandCost();
    00424
    00425   /* Steep slopes behave the same as slopes with one corner raised. */
    00426   if (IsSteepSlope(tileh)) {
    00427     tileh = SlopeWithOneCornerRaised(GetHighestSlopeCorner(tileh));
    00428   }
    00429
    00430   /* Save the merge of all bits of the current type */
    00431   RoadBits type_bits = existing | *pieces;
    00432
    00433   /* Roads on slopes */
    00434   if (_settings_game.construction.build_on_slopes && (_invalid_tileh_slopes_road[0][tileh] & (other | type_bits)) == ROAD_NONE) {
    00435
    00436     /* If we add leveling we've got to pay for it */
    00437     if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00438
    00439     return CommandCost();
    00440   }
    00441
    00442   /* Autocomplete uphill roads */
    00443   *pieces |= MirrorRoadBits(*pieces);
    00444   type_bits = existing | *pieces;
    00445
    00446   /* Uphill roads */
    00447   if (IsStraightRoad(type_bits) && (other == type_bits || other == ROAD_NONE) &&
    00448       (_invalid_tileh_slopes_road[1][tileh] & (other | type_bits)) == ROAD_NONE) {
    00449
    00450     /* Slopes with foundation ? */
    00451     if (IsSlopeWithOneCornerRaised(tileh)) {
    00452
    00453       /* Prevent build on slopes if it isn't allowed */
    00454       if (_settings_game.construction.build_on_slopes) {
    00455
    00456         /* If we add foundation we've got to pay for it */
    00457         if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00458
    00459         return CommandCost();
    00460       }
    00461     } else {
    00462       if (HasExactlyOneBit(existing) && GetRoadFoundation(tileh, existing) == FOUNDATION_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00463       return CommandCost();
    00464     }
    00465   }
    00466   return CMD_ERROR;
    00467 }
    00468
    00480 CommandCost CmdBuildRoad(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00481 {
    00482   CompanyID company = _current_company;
    00483   CommandCost cost(EXPENSES_CONSTRUCTION);
    00484
    00485   RoadBits existing = ROAD_NONE;
    00486   RoadBits other_bits = ROAD_NONE;
    00487
    00488   /* Road pieces are max 4 bitset values (NE, NW, SE, SW) and town can only be non-zero
    00489    * if a non-company is building the road */
    00490   if ((Company::IsValidID(company) && p2 != 0) || (company == OWNER_TOWN && !Town::IsValidID(p2)) || (company == OWNER_DEITY && p2 != 0)) return CMD_ERROR;
    00491   if (company != OWNER_TOWN) {
    00492     const Town *town = CalcClosestTownFromTile(tile);
    00493     p2 = (town != NULL) ? town->index : (TownID)INVALID_TOWN;
    00494
    00495     if (company == OWNER_DEITY) {
    00496       company = OWNER_TOWN;
    00497
    00498       /* If we are not within a town, we are not owned by the town */
    00499       if (town == NULL || DistanceSquare(tile, town->xy) > town->cache.squared_town_zone_radius[HZB_TOWN_EDGE]) {
    00500         company = OWNER_NONE;
    00501       }
    00502     }
    00503   }
    00504
    00505   RoadBits pieces = Extract<RoadBits, 0, 4>(p1);
    00506
    00507   /* do not allow building 'zero' road bits, code wouldn't handle it */
    00508   if (pieces == ROAD_NONE) return CMD_ERROR;
    00509
    00510   RoadType rt = Extract<RoadType, 4, 2>(p1);
    00511   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
    00512
    00513   DisallowedRoadDirections toggle_drd = Extract<DisallowedRoadDirections, 6, 2>(p1);
    00514
    00515   Slope tileh = GetTileSlope(tile);
    00516
    00517   bool need_to_clear = false;
    00518   switch (GetTileType(tile)) {
    00519     case MP_ROAD:
    00520       switch (GetRoadTileType(tile)) {
    00521         case ROAD_TILE_NORMAL: {
    00522           if (HasRoadWorks(tile)) return_cmd_error(STR_ERROR_ROAD_WORKS_IN_PROGRESS);
    00523
    00524           other_bits = GetOtherRoadBits(tile, rt);
    00525           if (!HasTileRoadType(tile, rt)) break;
    00526
    00527           existing = GetRoadBits(tile, rt);
    00528           bool crossing = !IsStraightRoad(existing | pieces);
    00529           if (rt != ROADTYPE_TRAM && (GetDisallowedRoadDirections(tile) != DRD_NONE || toggle_drd != DRD_NONE) && crossing) {
    00530             /* Junctions cannot be one-way */
    00531             return_cmd_error(STR_ERROR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
    00532           }
    00533           if ((existing & pieces) == pieces) {
    00534             /* We only want to set the (dis)allowed road directions */
    00535             if (toggle_drd != DRD_NONE && rt != ROADTYPE_TRAM) {
    00536               if (crossing) return_cmd_error(STR_ERROR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
    00537
    00538               Owner owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    00539               if (owner != OWNER_NONE) {
    00540                 CommandCost ret = CheckOwnership(owner, tile);
    00541                 if (ret.Failed()) return ret;
    00542               }
    00543
    00544               DisallowedRoadDirections dis_existing = GetDisallowedRoadDirections(tile);
    00545               DisallowedRoadDirections dis_new      = dis_existing ^ toggle_drd;
    00546
    00547               /* We allow removing disallowed directions to break up
    00548                * deadlocks, but adding them can break articulated
    00549                * vehicles. As such, only when less is disallowed,
    00550                * i.e. bits are removed, we skip the vehicle check. */
    00551               if (CountBits(dis_existing) <= CountBits(dis_new)) {
    00552                 CommandCost ret = EnsureNoVehicleOnGround(tile);
    00553                 if (ret.Failed()) return ret;
    00554               }
    00555
    00556               /* Ignore half built tiles */
    00557               if ((flags & DC_EXEC) && rt != ROADTYPE_TRAM && IsStraightRoad(existing)) {
    00558                 SetDisallowedRoadDirections(tile, dis_new);
    00559                 MarkTileDirtyByTile(tile);
    00560               }
    00561               return CommandCost();
    00562             }
    00563             return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00564           }
    00565           break;
    00566         }
    00567
    00568         case ROAD_TILE_CROSSING:
    00569           other_bits = GetCrossingRoadBits(tile);
    00570           if (pieces & ComplementRoadBits(other_bits)) goto do_clear;
    00571           pieces = other_bits; // we need to pay for both roadbits
    00572
    00573           if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00574           break;
    00575
    00576         case ROAD_TILE_DEPOT:
    00577           if ((GetAnyRoadBits(tile, rt) & pieces) == pieces) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00578           goto do_clear;
    00579
    00580         default: NOT_REACHED();
    00581       }
    00582       break;
    00583
    00584     case MP_RAILWAY: {
    00585       if (IsSteepSlope(tileh)) {
    00586         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00587       }
    00588
    00589       /* Level crossings may only be built on these slopes */
    00590       if (!HasBit(VALID_LEVEL_CROSSING_SLOPES, tileh)) {
    00591         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00592       }
    00593
    00594       if (GetRailTileType(tile) != RAIL_TILE_NORMAL) goto do_clear;
    00595
    00596       if (RailNoLevelCrossings(GetRailType(tile))) {
    00597         return_cmd_error(STR_ERROR_CROSSING_DISALLOWED);
    00598       }
    00599
    00600       Axis roaddir;
    00601       switch (GetTrackBits(tile)) {
    00602         case TRACK_BIT_X:
    00603           if (pieces & ROAD_X) goto do_clear;
    00604           roaddir = AXIS_Y;
    00605           break;
    00606
    00607         case TRACK_BIT_Y:
    00608           if (pieces & ROAD_Y) goto do_clear;
    00609           roaddir = AXIS_X;
    00610           break;
    00611
    00612         default: goto do_clear;
    00613       }
    00614
    00615       CommandCost ret = EnsureNoVehicleOnGround(tile);
    00616       if (ret.Failed()) return ret;
    00617
    00618       if (flags & DC_EXEC) {
    00619         Track railtrack = AxisToTrack(OtherAxis(roaddir));
    00620         YapfNotifyTrackLayoutChange(tile, railtrack);
    00621         /* Update company infrastructure counts. A level crossing has two road bits. */
    00622         Company *c = Company::GetIfValid(company);
    00623         if (c != NULL) {
    00624           c->infrastructure.road[rt] += 2;
    00625           if (rt != ROADTYPE_ROAD) c->infrastructure.road[ROADTYPE_ROAD] += 2;
    00626           DirtyCompanyInfrastructureWindows(company);
    00627         }
    00628         /* Update rail count for level crossings. The plain track is already
    00629          * counted, so only add the difference to the level crossing cost. */
    00630         c = Company::GetIfValid(GetTileOwner(tile));
    00631         if (c != NULL) c->infrastructure.rail[GetRailType(tile)] += LEVELCROSSING_TRACKBIT_FACTOR - 1;
    00632
    00633         /* Always add road to the roadtypes (can't draw without it) */
    00634         bool reserved = HasBit(GetRailReservationTrackBits(tile), railtrack);
    00635         MakeRoadCrossing(tile, company, company, GetTileOwner(tile), roaddir, GetRailType(tile), RoadTypeToRoadTypes(rt) | ROADTYPES_ROAD, p2);
    00636         SetCrossingReservation(tile, reserved);
    00637         UpdateLevelCrossing(tile, false);
    00638         MarkTileDirtyByTile(tile);
    00639       }
    00640       return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_ROAD] * (rt == ROADTYPE_ROAD ? 2 : 4));
    00641     }
    00642
    00643     case MP_STATION: {
    00644       if ((GetAnyRoadBits(tile, rt) & pieces) == pieces) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00645       if (!IsDriveThroughStopTile(tile)) goto do_clear;
    00646
    00647       RoadBits curbits = AxisToRoadBits(DiagDirToAxis(GetRoadStopDir(tile)));
    00648       if (pieces & ~curbits) goto do_clear;
    00649       pieces = curbits; // we need to pay for both roadbits
    00650
    00651       if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00652       break;
    00653     }
    00654
    00655     case MP_TUNNELBRIDGE: {
    00656       if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) goto do_clear;
    00657       /* Only allow building the outern roadbit, so building long roads stops at existing bridges */
    00658       if (MirrorRoadBits(DiagDirToRoadBits(GetTunnelBridgeDirection(tile))) != pieces) goto do_clear;
    00659       if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00660       /* Don't allow adding roadtype to the bridge/tunnel when vehicles are already driving on it */
    00661       CommandCost ret = TunnelBridgeIsFree(tile, GetOtherTunnelBridgeEnd(tile));
    00662       if (ret.Failed()) return ret;
    00663       break;
    00664     }
    00665
    00666     default: {
    00667 do_clear:;
    00668       need_to_clear = true;
    00669       break;
    00670     }
    00671   }
    00672
    00673   if (need_to_clear) {
    00674     CommandCost ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00675     if (ret.Failed()) return ret;
    00676     cost.AddCost(ret);
    00677   }
    00678
    00679   if (other_bits != pieces) {
    00680     /* Check the foundation/slopes when adding road/tram bits */
    00681     CommandCost ret = CheckRoadSlope(tileh, &pieces, existing, other_bits);
    00682     /* Return an error if we need to build a foundation (ret != 0) but the
    00683      * current setting is turned off */
    00684     if (ret.Failed() || (ret.GetCost() != 0 && !_settings_game.construction.build_on_slopes)) {
    00685       return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00686     }
    00687     cost.AddCost(ret);
    00688   }
    00689
    00690   if (!need_to_clear) {
    00691     if (IsTileType(tile, MP_ROAD)) {
    00692       /* Don't put the pieces that already exist */
    00693       pieces &= ComplementRoadBits(existing);
    00694
    00695       /* Check if new road bits will have the same foundation as other existing road types */
    00696       if (IsNormalRoad(tile)) {
    00697         Slope slope = GetTileSlope(tile);
    00698         Foundation found_new = GetRoadFoundation(slope, pieces | existing);
    00699
    00700         /* Test if all other roadtypes can be built at that foundation */
    00701         for (RoadType rtest = ROADTYPE_ROAD; rtest < ROADTYPE_END; rtest++) {
    00702           if (rtest != rt) { // check only other road types
    00703             RoadBits bits = GetRoadBits(tile, rtest);
    00704             /* do not check if there are not road bits of given type */
    00705             if (bits != ROAD_NONE && GetRoadFoundation(slope, bits) != found_new) {
    00706               return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00707             }
    00708           }
    00709         }
    00710       }
    00711     }
    00712
    00713     CommandCost ret = EnsureNoVehicleOnGround(tile);
    00714     if (ret.Failed()) return ret;
    00715
    00716   }
    00717
    00718   uint num_pieces = (!need_to_clear && IsTileType(tile, MP_TUNNELBRIDGE)) ?
    00719       /* There are 2 pieces on *every* tile of the bridge or tunnel */
    00720       2 * (GetTunnelBridgeLength(GetOtherTunnelBridgeEnd(tile), tile) + 2) :
    00721       /* Count pieces */
    00722       CountBits(pieces);
    00723
    00724   cost.AddCost(num_pieces * _price[PR_BUILD_ROAD]);
    00725
    00726   if (flags & DC_EXEC) {
    00727     switch (GetTileType(tile)) {
    00728       case MP_ROAD: {
    00729         RoadTileType rtt = GetRoadTileType(tile);
    00730         if (existing == ROAD_NONE || rtt == ROAD_TILE_CROSSING) {
    00731           SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
    00732           SetRoadOwner(tile, rt, company);
    00733           if (rt == ROADTYPE_ROAD) SetTownIndex(tile, p2);
    00734         }
    00735         if (rtt != ROAD_TILE_CROSSING) SetRoadBits(tile, existing | pieces, rt);
    00736         break;
    00737       }
    00738
    00739       case MP_TUNNELBRIDGE: {
    00740         TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
    00741
    00742         SetRoadTypes(other_end, GetRoadTypes(other_end) | RoadTypeToRoadTypes(rt));
    00743         SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
    00744         SetRoadOwner(other_end, rt, company);
    00745         SetRoadOwner(tile, rt, company);
    00746
    00747         /* Mark tiles dirty that have been repaved */
    00748         MarkTileDirtyByTile(other_end);
    00749         MarkTileDirtyByTile(tile);
    00750         if (IsBridge(tile)) {
    00751           TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
    00752
    00753           for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
    00754         }
    00755         break;
    00756       }
    00757
    00758       case MP_STATION:
    00759         assert(IsDriveThroughStopTile(tile));
    00760         SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
    00761         SetRoadOwner(tile, rt, company);
    00762         break;
    00763
    00764       default:
    00765         MakeRoadNormal(tile, pieces, RoadTypeToRoadTypes(rt), p2, company, company);
    00766         break;
    00767     }
    00768
    00769     /* Update company infrastructure count. */
    00770     Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
    00771     if (c != NULL) {
    00772       if (IsTileType(tile, MP_TUNNELBRIDGE)) num_pieces *= TUNNELBRIDGE_TRACKBIT_FACTOR;
    00773       c->infrastructure.road[rt] += num_pieces;
    00774       DirtyCompanyInfrastructureWindows(c->index);
    00775     }
    00776
    00777     if (rt != ROADTYPE_TRAM && IsNormalRoadTile(tile)) {
    00778       existing |= pieces;
    00779       SetDisallowedRoadDirections(tile, IsStraightRoad(existing) ?
    00780           GetDisallowedRoadDirections(tile) ^ toggle_drd : DRD_NONE);
    00781     }
    00782
    00783     MarkTileDirtyByTile(tile);
    00784   }
    00785   return cost;
    00786 }
    00787
    00795 static bool CanConnectToRoad(TileIndex tile, RoadType rt, DiagDirection dir)
    00796 {
    00797   RoadBits bits = GetAnyRoadBits(tile + TileOffsByDiagDir(dir), rt, false);
    00798   return (bits & DiagDirToRoadBits(ReverseDiagDir(dir))) != 0;
    00799 }
    00800
    00818 CommandCost CmdBuildLongRoad(TileIndex start_tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00819 {
    00820   DisallowedRoadDirections drd = DRD_NORTHBOUND;
    00821
    00822   if (p1 >= MapSize()) return CMD_ERROR;
    00823
    00824   TileIndex end_tile = p1;
    00825   RoadType rt = Extract<RoadType, 3, 2>(p2);
    00826   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
    00827
    00828   Axis axis = Extract<Axis, 2, 1>(p2);
    00829   /* Only drag in X or Y direction dictated by the direction variable */
    00830   if (axis == AXIS_X && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
    00831   if (axis == AXIS_Y && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
    00832
    00833   DiagDirection dir = AxisToDiagDir(axis);
    00834
    00835   /* Swap direction, also the half-tile drag var (bit 0 and 1) */
    00836   if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
    00837     dir = ReverseDiagDir(dir);
    00838     p2 ^= 3;
    00839     drd = DRD_SOUTHBOUND;
    00840   }
    00841
    00842   /* On the X-axis, we have to swap the initial bits, so they
    00843    * will be interpreted correctly in the GTTS. Furthermore
    00844    * when you just 'click' on one tile to build them. */
    00845   if ((axis == AXIS_Y) == (start_tile == end_tile && HasBit(p2, 0) == HasBit(p2, 1))) drd ^= DRD_BOTH;
    00846   /* No disallowed direction bits have to be toggled */
    00847   if (!HasBit(p2, 5)) drd = DRD_NONE;
    00848
    00849   CommandCost cost(EXPENSES_CONSTRUCTION);
    00850   CommandCost last_error = CMD_ERROR;
    00851   TileIndex tile = start_tile;
    00852   bool had_bridge = false;
    00853   bool had_tunnel = false;
    00854   bool had_success = false;
    00855   bool is_ai = HasBit(p2, 6);
    00856
    00857   /* Start tile is the first tile clicked by the user. */
    00858   for (;;) {
    00859     RoadBits bits = AxisToRoadBits(axis);
    00860
    00861     /* Determine which road parts should be built. */
    00862     if (!is_ai && start_tile != end_tile) {
    00863       /* Only build the first and last roadbit if they can connect to something. */
    00864       if (tile == end_tile && !CanConnectToRoad(tile, rt, dir)) {
    00865         bits = DiagDirToRoadBits(ReverseDiagDir(dir));
    00866       } else if (tile == start_tile && !CanConnectToRoad(tile, rt, ReverseDiagDir(dir))) {
    00867         bits = DiagDirToRoadBits(dir);
    00868       }
    00869     } else {
    00870       /* Road parts only have to be built at the start tile or at the end tile. */
    00871       if (tile == end_tile && !HasBit(p2, 1)) bits &= DiagDirToRoadBits(ReverseDiagDir(dir));
    00872       if (tile == start_tile && HasBit(p2, 0)) bits &= DiagDirToRoadBits(dir);
    00873     }
    00874
    00875     CommandCost ret = DoCommand(tile, drd << 6 | rt << 4 | bits, 0, flags, CMD_BUILD_ROAD);
    00876     if (ret.Failed()) {
    00877       last_error = ret;
    00878       if (last_error.GetErrorMessage() != STR_ERROR_ALREADY_BUILT) {
    00879         if (is_ai) return last_error;
    00880         break;
    00881       }
    00882     } else {
    00883       had_success = true;
    00884       /* Only pay for the upgrade on one side of the bridges and tunnels */
    00885       if (IsTileType(tile, MP_TUNNELBRIDGE)) {
    00886         if (IsBridge(tile)) {
    00887           if (!had_bridge || GetTunnelBridgeDirection(tile) == dir) {
    00888             cost.AddCost(ret);
    00889           }
    00890           had_bridge = true;
    00891         } else { // IsTunnel(tile)
    00892           if (!had_tunnel || GetTunnelBridgeDirection(tile) == dir) {
    00893             cost.AddCost(ret);
    00894           }
    00895           had_tunnel = true;
    00896         }
    00897       } else {
    00898         cost.AddCost(ret);
    00899       }
    00900     }
    00901
    00902     if (tile == end_tile) break;
    00903
    00904     tile += TileOffsByDiagDir(dir);
    00905   }
    00906
    00907   return had_success ? cost : last_error;
    00908 }
    00909
    00923 CommandCost CmdRemoveLongRoad(TileIndex start_tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00924 {
    00925   CommandCost cost(EXPENSES_CONSTRUCTION);
    00926
    00927   if (p1 >= MapSize()) return CMD_ERROR;
    00928
    00929   TileIndex end_tile = p1;
    00930   RoadType rt = Extract<RoadType, 3, 2>(p2);
    00931   if (!IsValidRoadType(rt)) return CMD_ERROR;
    00932
    00933   Axis axis = Extract<Axis, 2, 1>(p2);
    00934   /* Only drag in X or Y direction dictated by the direction variable */
    00935   if (axis == AXIS_X && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
    00936   if (axis == AXIS_Y && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
    00937
    00938   /* Swap start and ending tile, also the half-tile drag var (bit 0 and 1) */
    00939   if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
    00940     TileIndex t = start_tile;
    00941     start_tile = end_tile;
    00942     end_tile = t;
    00943     p2 ^= IsInsideMM(p2 & 3, 1, 3) ? 3 : 0;
    00944   }
    00945
    00946   Money money = GetAvailableMoneyForCommand();
    00947   TileIndex tile = start_tile;
    00948   CommandCost last_error = CMD_ERROR;
    00949   bool had_success = false;
    00950   /* Start tile is the small number. */
    00951   for (;;) {
    00952     RoadBits bits = AxisToRoadBits(axis);
    00953
    00954     if (tile == end_tile && !HasBit(p2, 1)) bits &= ROAD_NW | ROAD_NE;
    00955     if (tile == start_tile && HasBit(p2, 0)) bits &= ROAD_SE | ROAD_SW;
    00956
    00957     /* try to remove the halves. */
    00958     if (bits != 0) {
    00959       CommandCost ret = RemoveRoad(tile, flags & ~DC_EXEC, bits, rt, true);
    00960       if (ret.Succeeded()) {
    00961         if (flags & DC_EXEC) {
    00962           money -= ret.GetCost();
    00963           if (money < 0) {
    00964             _additional_cash_required = DoCommand(start_tile, end_tile, p2, flags & ~DC_EXEC, CMD_REMOVE_LONG_ROAD).GetCost();
    00965             return cost;
    00966           }
    00967           RemoveRoad(tile, flags, bits, rt, true, false);
    00968         }
    00969         cost.AddCost(ret);
    00970         had_success = true;
    00971       } else {
    00972         /* Ownership errors are more important. */
    00973         if (last_error.GetErrorMessage() != STR_ERROR_OWNED_BY) last_error = ret;
    00974       }
    00975     }
    00976
    00977     if (tile == end_tile) break;
    00978
    00979     tile += (axis == AXIS_Y) ? TileDiffXY(0, 1) : TileDiffXY(1, 0);
    00980   }
    00981
    00982   return had_success ? cost : last_error;
    00983 }
    00984
    00998 CommandCost CmdBuildRoadDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00999 {
    01000   DiagDirection dir = Extract<DiagDirection, 0, 2>(p1);
    01001   RoadType rt = Extract<RoadType, 2, 2>(p1);
    01002
    01003   if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
    01004
    01005   Slope tileh = GetTileSlope(tile);
    01006   if (tileh != SLOPE_FLAT && (
    01007         !_settings_game.construction.build_on_slopes ||
    01008         !CanBuildDepotByTileh(dir, tileh)
    01009       )) {
    01010     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    01011   }
    01012
    01013   CommandCost cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    01014   if (cost.Failed()) return cost;
    01015
    01016   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    01017
    01018   if (!Depot::CanAllocateItem()) return CMD_ERROR;
    01019
    01020   if (flags & DC_EXEC) {
    01021     Depot *dep = new Depot(tile);
    01022     dep->build_date = _date;
    01023
    01024     /* A road depot has two road bits. */
    01025     Company::Get(_current_company)->infrastructure.road[rt] += 2;
    01026     DirtyCompanyInfrastructureWindows(_current_company);
    01027
    01028     MakeRoadDepot(tile, _current_company, dep->index, dir, rt);
    01029     MarkTileDirtyByTile(tile);
    01030     MakeDefaultName(dep);
    01031   }
    01032   cost.AddCost(_price[PR_BUILD_DEPOT_ROAD]);
    01033   return cost;
    01034 }
    01035
    01036 static CommandCost RemoveRoadDepot(TileIndex tile, DoCommandFlag flags)
    01037 {
    01038   if (_current_company != OWNER_WATER) {
    01039     CommandCost ret = CheckTileOwnership(tile);
    01040     if (ret.Failed()) return ret;
    01041   }
    01042
    01043   CommandCost ret = EnsureNoVehicleOnGround(tile);
    01044   if (ret.Failed()) return ret;
    01045
    01046   if (flags & DC_EXEC) {
    01047     Company *c = Company::GetIfValid(GetTileOwner(tile));
    01048     if (c != NULL) {
    01049       /* A road depot has two road bits. */
    01050       c->infrastructure.road[FIND_FIRST_BIT(GetRoadTypes(tile))] -= 2;
    01051       DirtyCompanyInfrastructureWindows(c->index);
    01052     }
    01053
    01054     delete Depot::GetByTile(tile);
    01055     DoClearSquare(tile);
    01056   }
    01057
    01058   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_DEPOT_ROAD]);
    01059 }
    01060
    01061 static CommandCost ClearTile_Road(TileIndex tile, DoCommandFlag flags)
    01062 {
    01063   switch (GetRoadTileType(tile)) {
    01064     case ROAD_TILE_NORMAL: {
    01065       RoadBits b = GetAllRoadBits(tile);
    01066
    01067       /* Clear the road if only one piece is on the tile OR we are not using the DC_AUTO flag */
    01068       if ((HasExactlyOneBit(b) && GetRoadBits(tile, ROADTYPE_TRAM) == ROAD_NONE) || !(flags & DC_AUTO)) {
    01069         CommandCost ret(EXPENSES_CONSTRUCTION);
    01070         RoadType rt;
    01071         FOR_EACH_SET_ROADTYPE(rt, GetRoadTypes(tile)) {
    01072           CommandCost tmp_ret = RemoveRoad(tile, flags, GetRoadBits(tile, rt), rt, true);
    01073           if (tmp_ret.Failed()) return tmp_ret;
    01074           ret.AddCost(tmp_ret);
    01075         }
    01076         return ret;
    01077       }
    01078       return_cmd_error(STR_ERROR_MUST_REMOVE_ROAD_FIRST);
    01079     }
    01080
    01081     case ROAD_TILE_CROSSING: {
    01082       RoadTypes rts = GetRoadTypes(tile);
    01083       CommandCost ret(EXPENSES_CONSTRUCTION);
    01084
    01085       if (flags & DC_AUTO) return_cmd_error(STR_ERROR_MUST_REMOVE_ROAD_FIRST);
    01086
    01087       /* Must iterate over the roadtypes in a reverse manner because
    01088        * tram tracks must be removed before the road bits. */
    01089       RoadType rt = ROADTYPE_TRAM;
    01090       do {
    01091         if (HasBit(rts, rt)) {
    01092           CommandCost tmp_ret = RemoveRoad(tile, flags, GetCrossingRoadBits(tile), rt, false);
    01093           if (tmp_ret.Failed()) return tmp_ret;
    01094           ret.AddCost(tmp_ret);
    01095         }
    01096       } while (rt-- != ROADTYPE_ROAD);
    01097
    01098       if (flags & DC_EXEC) {
    01099         DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    01100       }
    01101       return ret;
    01102     }
    01103
    01104     default:
    01105     case ROAD_TILE_DEPOT:
    01106       if (flags & DC_AUTO) {
    01107         return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
    01108       }
    01109       return RemoveRoadDepot(tile, flags);
    01110   }
    01111 }
    01112
    01113
    01114 struct DrawRoadTileStruct {
    01115   uint16 image;
    01116   byte subcoord_x;
    01117   byte subcoord_y;
    01118 };
    01119
    01120 #include "table/road_land.h"
    01121
    01129 static Foundation GetRoadFoundation(Slope tileh, RoadBits bits)
    01130 {
    01131   /* Flat land and land without a road doesn't require a foundation */
    01132   if (tileh == SLOPE_FLAT || bits == ROAD_NONE) return FOUNDATION_NONE;
    01133
    01134   /* Steep slopes behave the same as slopes with one corner raised. */
    01135   if (IsSteepSlope(tileh)) {
    01136     tileh = SlopeWithOneCornerRaised(GetHighestSlopeCorner(tileh));
    01137   }
    01138
    01139   /* Leveled RoadBits on a slope */
    01140   if ((_invalid_tileh_slopes_road[0][tileh] & bits) == ROAD_NONE) return FOUNDATION_LEVELED;
    01141
    01142   /* Straight roads without foundation on a slope */
    01143   if (!IsSlopeWithOneCornerRaised(tileh) &&
    01144       (_invalid_tileh_slopes_road[1][tileh] & bits) == ROAD_NONE)
    01145     return FOUNDATION_NONE;
    01146
    01147   /* Roads on steep Slopes or on Slopes with one corner raised */
    01148   return (bits == ROAD_X ? FOUNDATION_INCLINED_X : FOUNDATION_INCLINED_Y);
    01149 }
    01150
    01151 const byte _road_sloped_sprites[14] = {
    01152   0,  0,  2,  0,
    01153   0,  1,  0,  0,
    01154   3,  0,  0,  0,
    01155   0,  0
    01156 };
    01157
    01168 static bool AlwaysDrawUnpavedRoads(TileIndex tile, Roadside roadside)
    01169 {
    01170   return (IsOnSnow(tile) &&
    01171       !(_settings_game.game_creation.landscape == LT_TROPIC && HasGrfMiscBit(GMB_DESERT_PAVED_ROADS) &&
    01172         roadside != ROADSIDE_BARREN && roadside != ROADSIDE_GRASS && roadside != ROADSIDE_GRASS_ROAD_WORKS));
    01173 }
    01174
    01180 void DrawTramCatenary(const TileInfo *ti, RoadBits tram)
    01181 {
    01182   /* Do not draw catenary if it is invisible */
    01183   if (IsInvisibilitySet(TO_CATENARY)) return;
    01184
    01185   /* Don't draw the catenary under a low bridge */
    01186   if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && !IsTransparencySet(TO_CATENARY)) {
    01187     int height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
    01188
    01189     if (height <= GetTileMaxZ(ti->tile) + 1) return;
    01190   }
    01191
    01192   SpriteID front;
    01193   SpriteID back;
    01194
    01195   if (ti->tileh != SLOPE_FLAT) {
    01196     back  = SPR_TRAMWAY_BACK_WIRES_SLOPED  + _road_sloped_sprites[ti->tileh - 1];
    01197     front = SPR_TRAMWAY_FRONT_WIRES_SLOPED + _road_sloped_sprites[ti->tileh - 1];
    01198   } else {
    01199     back  = SPR_TRAMWAY_BASE + _road_backpole_sprites_1[tram];
    01200     front = SPR_TRAMWAY_BASE + _road_frontwire_sprites_1[tram];
    01201   }
    01202
    01203   AddSortableSpriteToDraw(back,  PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
    01204   AddSortableSpriteToDraw(front, PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
    01205 }
    01206
    01215 static void DrawRoadDetail(SpriteID img, const TileInfo *ti, int dx, int dy, int h)
    01216 {
    01217   int x = ti->x | dx;
    01218   int y = ti->y | dy;
    01219   int z = ti->z;
    01220   if (ti->tileh != SLOPE_FLAT) z = GetSlopePixelZ(x, y);
    01221   AddSortableSpriteToDraw(img, PAL_NONE, x, y, 2, 2, h, z);
    01222 }
    01223
    01228 static void DrawRoadBits(TileInfo *ti)
    01229 {
    01230   RoadBits road = GetRoadBits(ti->tile, ROADTYPE_ROAD);
    01231   RoadBits tram = GetRoadBits(ti->tile, ROADTYPE_TRAM);
    01232
    01233   SpriteID image = 0;
    01234   PaletteID pal = PAL_NONE;
    01235
    01236   if (ti->tileh != SLOPE_FLAT) {
    01237     DrawFoundation(ti, GetRoadFoundation(ti->tileh, road | tram));
    01238
    01239     /* DrawFoundation() modifies ti.
    01240      * Default sloped sprites.. */
    01241     if (ti->tileh != SLOPE_FLAT) image = _road_sloped_sprites[ti->tileh - 1] + SPR_ROAD_SLOPE_START;
    01242   }
    01243
    01244   if (image == 0) image = _road_tile_sprites_1[road != ROAD_NONE ? road : tram];
    01245
    01246   Roadside roadside = GetRoadside(ti->tile);
    01247
    01248   if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
    01249     image += 19;
    01250   } else {
    01251     switch (roadside) {
    01252       case ROADSIDE_BARREN:           pal = PALETTE_TO_BARE_LAND; break;
    01253       case ROADSIDE_GRASS:            break;
    01254       case ROADSIDE_GRASS_ROAD_WORKS: break;
    01255       default:                        image -= 19; break; // Paved
    01256     }
    01257   }
    01258
    01259   DrawGroundSprite(image, pal);
    01260
    01261   /* For tram we overlay the road graphics with either tram tracks only
    01262    * (when there is actual road beneath the trams) or with tram tracks
    01263    * and some dirts which hides the road graphics */
    01264   if (tram != ROAD_NONE) {
    01265     if (ti->tileh != SLOPE_FLAT) {
    01266       image = _road_sloped_sprites[ti->tileh - 1] + SPR_TRAMWAY_SLOPED_OFFSET;
    01267     } else {
    01268       image = _road_tile_sprites_1[tram] - SPR_ROAD_Y;
    01269     }
    01270     image += (road == ROAD_NONE) ? SPR_TRAMWAY_TRAM : SPR_TRAMWAY_OVERLAY;
    01271     DrawGroundSprite(image, pal);
    01272   }
    01273
    01274   if (road != ROAD_NONE) {
    01275     DisallowedRoadDirections drd = GetDisallowedRoadDirections(ti->tile);
    01276     if (drd != DRD_NONE) {
    01277       DrawGroundSpriteAt(SPR_ONEWAY_BASE + drd - 1 + ((road == ROAD_X) ? 0 : 3), PAL_NONE, 8, 8, GetPartialPixelZ(8, 8, ti->tileh));
    01278     }
    01279   }
    01280
    01281   if (HasRoadWorks(ti->tile)) {
    01282     /* Road works */
    01283     DrawGroundSprite((road | tram) & ROAD_X ? SPR_EXCAVATION_X : SPR_EXCAVATION_Y, PAL_NONE);
    01284     return;
    01285   }
    01286
    01287   if (tram != ROAD_NONE) DrawTramCatenary(ti, tram);
    01288
    01289   /* Return if full detail is disabled, or we are zoomed fully out. */
    01290   if (!HasBit(_display_opt, DO_FULL_DETAIL) || _cur_dpi->zoom > ZOOM_LVL_DETAIL) return;
    01291
    01292   /* Do not draw details (street lights, trees) under low bridge */
    01293   if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && (roadside == ROADSIDE_TREES || roadside == ROADSIDE_STREET_LIGHTS)) {
    01294     int height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
    01295     int minz = GetTileMaxZ(ti->tile) + 2;
    01296
    01297     if (roadside == ROADSIDE_TREES) minz++;
    01298
    01299     if (height < minz) return;
    01300   }
    01301
    01302   /* If there are no road bits, return, as there is nothing left to do */
    01303   if (HasAtMostOneBit(road)) return;
    01304
    01305   /* Draw extra details. */
    01306   for (const DrawRoadTileStruct *drts = _road_display_table[roadside][road | tram]; drts->image != 0; drts++) {
    01307     DrawRoadDetail(drts->image, ti, drts->subcoord_x, drts->subcoord_y, 0x10);
    01308   }
    01309 }
    01310
    01312 static void DrawTile_Road(TileInfo *ti)
    01313 {
    01314   switch (GetRoadTileType(ti->tile)) {
    01315     case ROAD_TILE_NORMAL:
    01316       DrawRoadBits(ti);
    01317       break;
    01318
    01319     case ROAD_TILE_CROSSING: {
    01320       if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
    01321
    01322       PaletteID pal = PAL_NONE;
    01323       const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
    01324
    01325       if (rti->UsesOverlay()) {
    01326         Axis axis = GetCrossingRailAxis(ti->tile);
    01327         SpriteID road = SPR_ROAD_Y + axis;
    01328
    01329         Roadside roadside = GetRoadside(ti->tile);
    01330
    01331         if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
    01332           road += 19;
    01333         } else {
    01334           switch (roadside) {
    01335             case ROADSIDE_BARREN: pal = PALETTE_TO_BARE_LAND; break;
    01336             case ROADSIDE_GRASS:  break;
    01337             default:              road -= 19; break; // Paved
    01338           }
    01339         }
    01340
    01341         DrawGroundSprite(road, pal);
    01342
    01343         SpriteID rail = GetCustomRailSprite(rti, ti->tile, RTSG_CROSSING) + axis;
    01344         /* Draw tracks, but draw PBS reserved tracks darker. */
    01345         pal = (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasCrossingReservation(ti->tile)) ? PALETTE_CRASH : PAL_NONE;
    01346         DrawGroundSprite(rail, pal);
    01347
    01348         DrawRailTileSeq(ti, &_crossing_layout, TO_CATENARY, rail, 0, PAL_NONE);
    01349       } else {
    01350         SpriteID image = rti->base_sprites.crossing;
    01351
    01352         if (GetCrossingRoadAxis(ti->tile) == AXIS_X) image++;
    01353         if (IsCrossingBarred(ti->tile)) image += 2;
    01354
    01355         Roadside roadside = GetRoadside(ti->tile);
    01356
    01357         if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
    01358           image += 8;
    01359         } else {
    01360           switch (roadside) {
    01361             case ROADSIDE_BARREN: pal = PALETTE_TO_BARE_LAND; break;
    01362             case ROADSIDE_GRASS:  break;
    01363             default:              image += 4; break; // Paved
    01364           }
    01365         }
    01366
    01367         DrawGroundSprite(image, pal);
    01368
    01369         /* PBS debugging, draw reserved tracks darker */
    01370         if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasCrossingReservation(ti->tile)) {
    01371           DrawGroundSprite(GetCrossingRoadAxis(ti->tile) == AXIS_Y ? GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_x : GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_y, PALETTE_CRASH);
    01372         }
    01373       }
    01374
    01375       if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
    01376         DrawGroundSprite(SPR_TRAMWAY_OVERLAY + (GetCrossingRoadAxis(ti->tile) ^ 1), pal);
    01377         DrawTramCatenary(ti, GetCrossingRoadBits(ti->tile));
    01378       }
    01379       if (HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
    01380       break;
    01381     }
    01382
    01383     default:
    01384     case ROAD_TILE_DEPOT: {
    01385       if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
    01386
    01387       PaletteID palette = COMPANY_SPRITE_COLOUR(GetTileOwner(ti->tile));
    01388
    01389       const DrawTileSprites *dts;
    01390       if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
    01391         dts =  &_tram_depot[GetRoadDepotDirection(ti->tile)];
    01392       } else {
    01393         dts =  &_road_depot[GetRoadDepotDirection(ti->tile)];
    01394       }
    01395
    01396       DrawGroundSprite(dts->ground.sprite, PAL_NONE);
    01397       DrawOrigTileSeq(ti, dts, TO_BUILDINGS, palette);
    01398       break;
    01399     }
    01400   }
    01401   DrawBridgeMiddle(ti);
    01402 }
    01403
    01411 void DrawRoadDepotSprite(int x, int y, DiagDirection dir, RoadType rt)
    01412 {
    01413   PaletteID palette = COMPANY_SPRITE_COLOUR(_local_company);
    01414   const DrawTileSprites *dts = (rt == ROADTYPE_TRAM) ? &_tram_depot[dir] : &_road_depot[dir];
    01415
    01416   x += 33;
    01417   y += 17;
    01418
    01419   DrawSprite(dts->ground.sprite, PAL_NONE, x, y);
    01420   DrawOrigTileSeqInGUI(x, y, dts, palette);
    01421 }
    01422
    01428 void UpdateNearestTownForRoadTiles(bool invalidate)
    01429 {
    01430   assert(!invalidate || _generating_world);
    01431
    01432   for (TileIndex t = 0; t < MapSize(); t++) {
    01433     if (IsTileType(t, MP_ROAD) && !IsRoadDepot(t) && !HasTownOwnedRoad(t)) {
    01434       TownID tid = (TownID)INVALID_TOWN;
    01435       if (!invalidate) {
    01436         const Town *town = CalcClosestTownFromTile(t);
    01437         if (town != NULL) tid = town->index;
    01438       }
    01439       SetTownIndex(t, tid);
    01440     }
    01441   }
    01442 }
    01443
    01444 static int GetSlopePixelZ_Road(TileIndex tile, uint x, uint y)
    01445 {
    01446
    01447   if (IsNormalRoad(tile)) {
    01448     int z;
    01449     Slope tileh = GetTilePixelSlope(tile, &z);
    01450     if (tileh == SLOPE_FLAT) return z;
    01451
    01452     Foundation f = GetRoadFoundation(tileh, GetAllRoadBits(tile));
    01453     z += ApplyPixelFoundationToSlope(f, &tileh);
    01454     return z + GetPartialPixelZ(x & 0xF, y & 0xF, tileh);
    01455   } else {
    01456     return GetTileMaxPixelZ(tile);
    01457   }
    01458 }
    01459
    01460 static Foundation GetFoundation_Road(TileIndex tile, Slope tileh)
    01461 {
    01462   if (IsNormalRoad(tile)) {
    01463     return GetRoadFoundation(tileh, GetAllRoadBits(tile));
    01464   } else {
    01465     return FlatteningFoundation(tileh);
    01466   }
    01467 }
    01468
    01469 static const Roadside _town_road_types[][2] = {
    01470   { ROADSIDE_GRASS,         ROADSIDE_GRASS },
    01471   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
    01472   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
    01473   { ROADSIDE_TREES,         ROADSIDE_TREES },
    01474   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
    01475 };
    01476
    01477 static const Roadside _town_road_types_2[][2] = {
    01478   { ROADSIDE_GRASS,         ROADSIDE_GRASS },
    01479   { ROADSIDE_PAVED,         ROADSIDE_PAVED },
    01480   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
    01481   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
    01482   { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
    01483 };
    01484
    01485
    01486 static void TileLoop_Road(TileIndex tile)
    01487 {
    01488   switch (_settings_game.game_creation.landscape) {
    01489     case LT_ARCTIC:
    01490       if (IsOnSnow(tile) != (GetTileZ(tile) > GetSnowLine())) {
    01491         ToggleSnow(tile);
    01492         MarkTileDirtyByTile(tile);
    01493       }
    01494       break;
    01495
    01496     case LT_TROPIC:
    01497       if (GetTropicZone(tile) == TROPICZONE_DESERT && !IsOnDesert(tile)) {
    01498         ToggleDesert(tile);
    01499         MarkTileDirtyByTile(tile);
    01500       }
    01501       break;
    01502   }
    01503
    01504   if (IsRoadDepot(tile)) return;
    01505
    01506   const Town *t = ClosestTownFromTile(tile, UINT_MAX);
    01507   if (!HasRoadWorks(tile)) {
    01508     HouseZonesBits grp = HZB_TOWN_EDGE;
    01509
    01510     if (t != NULL) {
    01511       grp = GetTownRadiusGroup(t, tile);
    01512
    01513       /* Show an animation to indicate road work */
    01514       if (t->road_build_months != 0 &&
    01515           (DistanceManhattan(t->xy, tile) < 8 || grp != HZB_TOWN_EDGE) &&
    01516           IsNormalRoad(tile) && !HasAtMostOneBit(GetAllRoadBits(tile))) {
    01517         if (GetFoundationSlope(tile) == SLOPE_FLAT && EnsureNoVehicleOnGround(tile).Succeeded() && Chance16(1, 40)) {
    01518           StartRoadWorks(tile);
    01519
    01520           if (_settings_client.sound.ambient) SndPlayTileFx(SND_21_JACKHAMMER, tile);
    01521           CreateEffectVehicleAbove(
    01522             TileX(tile) * TILE_SIZE + 7,
    01523             TileY(tile) * TILE_SIZE + 7,
    01524             0,
    01525             EV_BULLDOZER);
    01526           MarkTileDirtyByTile(tile);
    01527           return;
    01528         }
    01529       }
    01530     }
    01531
    01532     {
    01533       /* Adjust road ground type depending on 'grp' (grp is the distance to the center) */
    01534       const Roadside *new_rs = (_settings_game.game_creation.landscape == LT_TOYLAND) ? _town_road_types_2[grp] : _town_road_types[grp];
    01535       Roadside cur_rs = GetRoadside(tile);
    01536
    01537       /* We have our desired type, do nothing */
    01538       if (cur_rs == new_rs[0]) return;
    01539
    01540       /* We have the pre-type of the desired type, switch to the desired type */
    01541       if (cur_rs == new_rs[1]) {
    01542         cur_rs = new_rs[0];
    01543       /* We have barren land, install the pre-type */
    01544       } else if (cur_rs == ROADSIDE_BARREN) {
    01545         cur_rs = new_rs[1];
    01546       /* We're totally off limits, remove any installation and make barren land */
    01547       } else {
    01548         cur_rs = ROADSIDE_BARREN;
    01549       }
    01550       SetRoadside(tile, cur_rs);
    01551       MarkTileDirtyByTile(tile);
    01552     }
    01553   } else if (IncreaseRoadWorksCounter(tile)) {
    01554     TerminateRoadWorks(tile);
    01555
    01556     if (_settings_game.economy.mod_road_rebuild) {
    01557       /* Generate a nicer town surface */
    01558       const RoadBits old_rb = GetAnyRoadBits(tile, ROADTYPE_ROAD);
    01559       const RoadBits new_rb = CleanUpRoadBits(tile, old_rb);
    01560
    01561       if (old_rb != new_rb) {
    01562         RemoveRoad(tile, DC_EXEC | DC_AUTO | DC_NO_WATER, (old_rb ^ new_rb), ROADTYPE_ROAD, true);
    01563       }
    01564     }
    01565
    01566     MarkTileDirtyByTile(tile);
    01567   }
    01568 }
    01569
    01570 static bool ClickTile_Road(TileIndex tile)
    01571 {
    01572   if (!IsRoadDepot(tile)) return false;
    01573
    01574   ShowDepotWindow(tile, VEH_ROAD);
    01575   return true;
    01576 }
    01577
    01578 /* Converts RoadBits to TrackBits */
    01579 static const TrackBits _road_trackbits[16] = {
    01580   TRACK_BIT_NONE,                                  // ROAD_NONE
    01581   TRACK_BIT_NONE,                                  // ROAD_NW
    01582   TRACK_BIT_NONE,                                  // ROAD_SW
    01583   TRACK_BIT_LEFT,                                  // ROAD_W
    01584   TRACK_BIT_NONE,                                  // ROAD_SE
    01585   TRACK_BIT_Y,                                     // ROAD_Y
    01586   TRACK_BIT_LOWER,                                 // ROAD_S
    01587   TRACK_BIT_LEFT | TRACK_BIT_LOWER | TRACK_BIT_Y,  // ROAD_Y | ROAD_SW
    01588   TRACK_BIT_NONE,                                  // ROAD_NE
    01589   TRACK_BIT_UPPER,                                 // ROAD_N
    01590   TRACK_BIT_X,                                     // ROAD_X
    01591   TRACK_BIT_LEFT | TRACK_BIT_UPPER | TRACK_BIT_X,  // ROAD_X | ROAD_NW
    01592   TRACK_BIT_RIGHT,                                 // ROAD_E
    01593   TRACK_BIT_RIGHT | TRACK_BIT_UPPER | TRACK_BIT_Y, // ROAD_Y | ROAD_NE
    01594   TRACK_BIT_RIGHT | TRACK_BIT_LOWER | TRACK_BIT_X, // ROAD_X | ROAD_SE
    01595   TRACK_BIT_ALL,                                   // ROAD_ALL
    01596 };
    01597
    01598 static TrackStatus GetTileTrackStatus_Road(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
    01599 {
    01600   TrackdirBits trackdirbits = TRACKDIR_BIT_NONE;
    01601   TrackdirBits red_signals = TRACKDIR_BIT_NONE; // crossing barred
    01602   switch (mode) {
    01603     case TRANSPORT_RAIL:
    01604       if (IsLevelCrossing(tile)) trackdirbits = TrackBitsToTrackdirBits(GetCrossingRailBits(tile));
    01605       break;
    01606
    01607     case TRANSPORT_ROAD:
    01608       if ((GetRoadTypes(tile) & sub_mode) == 0) break;
    01609       switch (GetRoadTileType(tile)) {
    01610         case ROAD_TILE_NORMAL: {
    01611           const uint drd_to_multiplier[DRD_END] = { 0x101, 0x100, 0x1, 0x0 };
    01612           RoadType rt = (RoadType)FindFirstBit(sub_mode);
    01613           RoadBits bits = GetRoadBits(tile, rt);
    01614
    01615           /* no roadbit at this side of tile, return 0 */
    01616           if (side != INVALID_DIAGDIR && (DiagDirToRoadBits(side) & bits) == 0) break;
    01617
    01618           uint multiplier = drd_to_multiplier[rt == ROADTYPE_TRAM ? DRD_NONE : GetDisallowedRoadDirections(tile)];
    01619           if (!HasRoadWorks(tile)) trackdirbits = (TrackdirBits)(_road_trackbits[bits] * multiplier);
    01620           break;
    01621         }
    01622
    01623         case ROAD_TILE_CROSSING: {
    01624           Axis axis = GetCrossingRoadAxis(tile);
    01625
    01626           if (side != INVALID_DIAGDIR && axis != DiagDirToAxis(side)) break;
    01627
    01628           trackdirbits = TrackBitsToTrackdirBits(AxisToTrackBits(axis));
    01629           if (IsCrossingBarred(tile)) red_signals = trackdirbits;
    01630           break;
    01631         }
    01632
    01633         default:
    01634         case ROAD_TILE_DEPOT: {
    01635           DiagDirection dir = GetRoadDepotDirection(tile);
    01636
    01637           if (side != INVALID_DIAGDIR && side != dir) break;
    01638
    01639           trackdirbits = TrackBitsToTrackdirBits(DiagDirToDiagTrackBits(dir));
    01640           break;
    01641         }
    01642       }
    01643       break;
    01644
    01645     default: break;
    01646   }
    01647   return CombineTrackStatus(trackdirbits, red_signals);
    01648 }
    01649
    01650 static const StringID _road_tile_strings[] = {
    01651   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01652   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01653   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01654   STR_LAI_ROAD_DESCRIPTION_ROAD_WITH_STREETLIGHTS,
    01655   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01656   STR_LAI_ROAD_DESCRIPTION_TREE_LINED_ROAD,
    01657   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01658   STR_LAI_ROAD_DESCRIPTION_ROAD,
    01659 };
    01660
    01661 static void GetTileDesc_Road(TileIndex tile, TileDesc *td)
    01662 {
    01663   Owner rail_owner = INVALID_OWNER;
    01664   Owner road_owner = INVALID_OWNER;
    01665   Owner tram_owner = INVALID_OWNER;
    01666
    01667   switch (GetRoadTileType(tile)) {
    01668     case ROAD_TILE_CROSSING: {
    01669       td->str = STR_LAI_ROAD_DESCRIPTION_ROAD_RAIL_LEVEL_CROSSING;
    01670       RoadTypes rts = GetRoadTypes(tile);
    01671       rail_owner = GetTileOwner(tile);
    01672       if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    01673       if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
    01674
    01675       const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
    01676       td->rail_speed = rti->max_speed;
    01677
    01678       break;
    01679     }
    01680
    01681     case ROAD_TILE_DEPOT:
    01682       td->str = STR_LAI_ROAD_DESCRIPTION_ROAD_VEHICLE_DEPOT;
    01683       road_owner = GetTileOwner(tile); // Tile has only one owner, roadtype does not matter
    01684       td->build_date = Depot::GetByTile(tile)->build_date;
    01685       break;
    01686
    01687     default: {
    01688       RoadTypes rts = GetRoadTypes(tile);
    01689       td->str = (HasBit(rts, ROADTYPE_ROAD) ? _road_tile_strings[GetRoadside(tile)] : STR_LAI_ROAD_DESCRIPTION_TRAMWAY);
    01690       if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    01691       if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
    01692       break;
    01693     }
    01694   }
    01695
    01696   /* Now we have to discover, if the tile has only one owner or many:
    01697    *   - Find a first_owner of the tile. (Currently road or tram must be present, but this will break when the third type becomes available)
    01698    *   - Compare the found owner with the other owners, and test if they differ.
    01699    * Note: If road exists it will be the first_owner.
    01700    */
    01701   Owner first_owner = (road_owner == INVALID_OWNER ? tram_owner : road_owner);
    01702   bool mixed_owners = (tram_owner != INVALID_OWNER && tram_owner != first_owner) || (rail_owner != INVALID_OWNER && rail_owner != first_owner);
    01703
    01704   if (mixed_owners) {
    01705     /* Multiple owners */
    01706     td->owner_type[0] = (rail_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_RAIL_OWNER);
    01707     td->owner[0] = rail_owner;
    01708     td->owner_type[1] = (road_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_ROAD_OWNER);
    01709     td->owner[1] = road_owner;
    01710     td->owner_type[2] = (tram_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_TRAM_OWNER);
    01711     td->owner[2] = tram_owner;
    01712   } else {
    01713     /* One to rule them all */
    01714     td->owner[0] = first_owner;
    01715   }
    01716 }
    01717
    01722 static const byte _roadveh_enter_depot_dir[4] = {
    01723   TRACKDIR_X_SW, TRACKDIR_Y_NW, TRACKDIR_X_NE, TRACKDIR_Y_SE
    01724 };
    01725
    01726 static VehicleEnterTileStatus VehicleEnter_Road(Vehicle *v, TileIndex tile, int x, int y)
    01727 {
    01728   switch (GetRoadTileType(tile)) {
    01729     case ROAD_TILE_DEPOT: {
    01730       if (v->type != VEH_ROAD) break;
    01731
    01732       RoadVehicle *rv = RoadVehicle::From(v);
    01733       if (rv->frame == RVC_DEPOT_STOP_FRAME &&
    01734           _roadveh_enter_depot_dir[GetRoadDepotDirection(tile)] == rv->state) {
    01735         rv->state = RVSB_IN_DEPOT;
    01736         rv->vehstatus |= VS_HIDDEN;
    01737         rv->direction = ReverseDir(rv->direction);
    01738         if (rv->Next() == NULL) VehicleEnterDepot(rv->First());
    01739         rv->tile = tile;
    01740
    01741         InvalidateWindowData(WC_VEHICLE_DEPOT, rv->tile);
    01742         return VETSB_ENTERED_WORMHOLE;
    01743       }
    01744       break;
    01745     }
    01746
    01747     default: break;
    01748   }
    01749   return VETSB_CONTINUE;
    01750 }
    01751
    01752
    01753 static void ChangeTileOwner_Road(TileIndex tile, Owner old_owner, Owner new_owner)
    01754 {
    01755   if (IsRoadDepot(tile)) {
    01756     if (GetTileOwner(tile) == old_owner) {
    01757       if (new_owner == INVALID_OWNER) {
    01758         DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
    01759       } else {
    01760         /* A road depot has two road bits. No need to dirty windows here, we'll redraw the whole screen anyway. */
    01761         RoadType rt = (RoadType)FIND_FIRST_BIT(GetRoadTypes(tile));
    01762         Company::Get(old_owner)->infrastructure.road[rt] -= 2;
    01763         Company::Get(new_owner)->infrastructure.road[rt] += 2;
    01764
    01765         SetTileOwner(tile, new_owner);
    01766       }
    01767     }
    01768     return;
    01769   }
    01770
    01771   for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
    01772     /* Update all roadtypes, no matter if they are present */
    01773     if (GetRoadOwner(tile, rt) == old_owner) {
    01774       if (HasTileRoadType(tile, rt)) {
    01775         /* A level crossing has two road bits. No need to dirty windows here, we'll redraw the whole screen anyway. */
    01776         uint num_bits = IsLevelCrossing(tile) ? 2 : CountBits(GetRoadBits(tile, rt));
    01777         Company::Get(old_owner)->infrastructure.road[rt] -= num_bits;
    01778         if (new_owner != INVALID_OWNER) Company::Get(new_owner)->infrastructure.road[rt] += num_bits;
    01779       }
    01780
    01781       SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
    01782     }
    01783   }
    01784
    01785   if (IsLevelCrossing(tile)) {
    01786     if (GetTileOwner(tile) == old_owner) {
    01787       if (new_owner == INVALID_OWNER) {
    01788         DoCommand(tile, 0, GetCrossingRailTrack(tile), DC_EXEC | DC_BANKRUPT, CMD_REMOVE_SINGLE_RAIL);
    01789       } else {
    01790         /* Update infrastructure counts. No need to dirty windows here, we'll redraw the whole screen anyway. */
    01791         Company::Get(old_owner)->infrastructure.rail[GetRailType(tile)] -= LEVELCROSSING_TRACKBIT_FACTOR;
    01792         Company::Get(new_owner)->infrastructure.rail[GetRailType(tile)] += LEVELCROSSING_TRACKBIT_FACTOR;
    01793
    01794         SetTileOwner(tile, new_owner);
    01795       }
    01796     }
    01797   }
    01798 }
    01799
    01800 static CommandCost TerraformTile_Road(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
    01801 {
    01802   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
    01803     switch (GetRoadTileType(tile)) {
    01804       case ROAD_TILE_CROSSING:
    01805         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]);
    01806         break;
    01807
    01808       case ROAD_TILE_DEPOT:
    01809         if (AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, GetRoadDepotDirection(tile))) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    01810         break;
    01811
    01812       case ROAD_TILE_NORMAL: {
    01813         RoadBits bits = GetAllRoadBits(tile);
    01814         RoadBits bits_copy = bits;
    01815         /* Check if the slope-road_bits combination is valid at all, i.e. it is safe to call GetRoadFoundation(). */
    01816         if (CheckRoadSlope(tileh_new, &bits_copy, ROAD_NONE, ROAD_NONE).Succeeded()) {
    01817           /* CheckRoadSlope() sometimes changes the road_bits, if it does not agree with them. */
    01818           if (bits == bits_copy) {
    01819             int z_old;
    01820             Slope tileh_old = GetTileSlope(tile, &z_old);
    01821
    01822             /* Get the slope on top of the foundation */
    01823             z_old += ApplyFoundationToSlope(GetRoadFoundation(tileh_old, bits), &tileh_old);
    01824             z_new += ApplyFoundationToSlope(GetRoadFoundation(tileh_new, bits), &tileh_new);
    01825
    01826             /* The surface slope must not be changed */
    01827             if ((z_old == z_new) && (tileh_old == tileh_new)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    01828           }
    01829         }
    01830         break;
    01831       }
    01832
    01833       default: NOT_REACHED();
    01834     }
    01835   }
    01836
    01837   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    01838 }
    01839
    01841 extern const TileTypeProcs _tile_type_road_procs = {
    01842   DrawTile_Road,           // draw_tile_proc
    01843   GetSlopePixelZ_Road,     // get_slope_z_proc
    01844   ClearTile_Road,          // clear_tile_proc
    01845   NULL,                    // add_accepted_cargo_proc
    01846   GetTileDesc_Road,        // get_tile_desc_proc
    01847   GetTileTrackStatus_Road, // get_tile_track_status_proc
    01848   ClickTile_Road,          // click_tile_proc
    01849   NULL,                    // animate_tile_proc
    01850   TileLoop_Road,           // tile_loop_proc
    01851   ChangeTileOwner_Road,    // change_tile_owner_proc
    01852   NULL,                    // add_produced_cargo_proc
    01853   VehicleEnter_Road,       // vehicle_enter_tile_proc
    01854   GetFoundation_Road,      // get_foundation_proc
    01855   TerraformTile_Road,      // terraform_tile_proc
    01856 };