# water_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 "landscape.h"
    00015 #include "viewport_func.h"
    00016 #include "command_func.h"
    00017 #include "town.h"
    00018 #include "news_func.h"
    00019 #include "depot_base.h"
    00020 #include "depot_func.h"
    00021 #include "water.h"
    00022 #include "industry_map.h"
    00023 #include "newgrf_canal.h"
    00024 #include "strings_func.h"
    00025 #include "vehicle_func.h"
    00026 #include "sound_func.h"
    00027 #include "company_func.h"
    00028 #include "clear_map.h"
    00029 #include "tree_map.h"
    00030 #include "aircraft.h"
    00031 #include "effectvehicle_func.h"
    00032 #include "tunnelbridge_map.h"
    00033 #include "station_base.h"
    00034 #include "ai/ai.hpp"
    00035 #include "core/random_func.hpp"
    00036 #include "core/backup_type.hpp"
    00037 #include "date_func.h"
    00038
    00039 #include "table/strings.h"
    00040
    00044 static const uint8 _flood_from_dirs[] = {
    00045   (1 << DIR_NW) | (1 << DIR_SW) | (1 << DIR_SE) | (1 << DIR_NE), // SLOPE_FLAT
    00046   (1 << DIR_NE) | (1 << DIR_SE),                                 // SLOPE_W
    00047   (1 << DIR_NW) | (1 << DIR_NE),                                 // SLOPE_S
    00048   (1 << DIR_NE),                                                 // SLOPE_SW
    00049   (1 << DIR_NW) | (1 << DIR_SW),                                 // SLOPE_E
    00050   0,                                                             // SLOPE_EW
    00051   (1 << DIR_NW),                                                 // SLOPE_SE
    00052   (1 << DIR_N ) | (1 << DIR_NW) | (1 << DIR_NE),                 // SLOPE_WSE, SLOPE_STEEP_S
    00053   (1 << DIR_SW) | (1 << DIR_SE),                                 // SLOPE_N
    00054   (1 << DIR_SE),                                                 // SLOPE_NW
    00055   0,                                                             // SLOPE_NS
    00056   (1 << DIR_E ) | (1 << DIR_NE) | (1 << DIR_SE),                 // SLOPE_NWS, SLOPE_STEEP_W
    00057   (1 << DIR_SW),                                                 // SLOPE_NE
    00058   (1 << DIR_S ) | (1 << DIR_SW) | (1 << DIR_SE),                 // SLOPE_ENW, SLOPE_STEEP_N
    00059   (1 << DIR_W ) | (1 << DIR_SW) | (1 << DIR_NW),                 // SLOPE_SEN, SLOPE_STEEP_E
    00060 };
    00061
    00068 static inline void MarkTileDirtyIfCanalOrRiver(TileIndex tile)
    00069 {
    00070   if (IsTileType(tile, MP_WATER) && (IsCanal(tile) || IsRiver(tile))) MarkTileDirtyByTile(tile);
    00071 }
    00072
    00079 static void MarkCanalsAndRiversAroundDirty(TileIndex tile)
    00080 {
    00081   for (Direction dir = DIR_BEGIN; dir < DIR_END; dir++) {
    00082     MarkTileDirtyIfCanalOrRiver(tile + TileOffsByDir(dir));
    00083   }
    00084 }
    00085
    00086
    00096 CommandCost CmdBuildShipDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00097 {
    00098   Axis axis = Extract<Axis, 0, 1>(p1);
    00099
    00100   TileIndex tile2 = tile + (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
    00101
    00102   if (!HasTileWaterGround(tile) || !HasTileWaterGround(tile2)) {
    00103     return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
    00104   }
    00105
    00106   if ((MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) ||
    00107     (MayHaveBridgeAbove(tile2) && IsBridgeAbove(tile2))) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    00108
    00109   if (GetTileSlope(tile, NULL) != SLOPE_FLAT || GetTileSlope(tile2, NULL) != SLOPE_FLAT) {
    00110     /* Prevent depots on rapids */
    00111     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    00112   }
    00113
    00114   if (!Depot::CanAllocateItem()) return CMD_ERROR;
    00115
    00116   WaterClass wc1 = GetWaterClass(tile);
    00117   WaterClass wc2 = GetWaterClass(tile2);
    00118   CommandCost cost = CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_DEPOT_SHIP]);
    00119
    00120   bool add_cost = !IsWaterTile(tile);
    00121   CommandCost ret = DoCommand(tile, 0, 0, flags | DC_AUTO, CMD_LANDSCAPE_CLEAR);
    00122   if (ret.Failed()) return ret;
    00123   if (add_cost) {
    00124     cost.AddCost(ret);
    00125   }
    00126   add_cost = !IsWaterTile(tile2);
    00127   ret = DoCommand(tile2, 0, 0, flags | DC_AUTO, CMD_LANDSCAPE_CLEAR);
    00128   if (ret.Failed()) return ret;
    00129   if (add_cost) {
    00130     cost.AddCost(ret);
    00131   }
    00132
    00133   if (flags & DC_EXEC) {
    00134     Depot *depot = new Depot(tile);
    00135     depot->build_date = _date;
    00136
    00137     MakeShipDepot(tile,  _current_company, depot->index, DEPOT_NORTH, axis, wc1);
    00138     MakeShipDepot(tile2, _current_company, depot->index, DEPOT_SOUTH, axis, wc2);
    00139     MarkTileDirtyByTile(tile);
    00140     MarkTileDirtyByTile(tile2);
    00141     MakeDefaultName(depot);
    00142   }
    00143
    00144   return cost;
    00145 }
    00146
    00147 void MakeWaterKeepingClass(TileIndex tile, Owner o)
    00148 {
    00149   WaterClass wc = GetWaterClass(tile);
    00150
    00151   /* Autoslope might turn an originally canal or river tile into land */
    00152   uint z;
    00153   if (GetTileSlope(tile, &z) != SLOPE_FLAT) wc = WATER_CLASS_INVALID;
    00154
    00155   if (wc == WATER_CLASS_SEA && z > 0) wc = WATER_CLASS_CANAL;
    00156
    00157   /* Zero map array and terminate animation */
    00158   DoClearSquare(tile);
    00159
    00160   /* Maybe change to water */
    00161   switch (wc) {
    00162     case WATER_CLASS_SEA:   MakeSea(tile);                break;
    00163     case WATER_CLASS_CANAL: MakeCanal(tile, o, Random()); break;
    00164     case WATER_CLASS_RIVER: MakeRiver(tile, Random());    break;
    00165     default: break;
    00166   }
    00167
    00168   MarkTileDirtyByTile(tile);
    00169 }
    00170
    00171 static CommandCost RemoveShipDepot(TileIndex tile, DoCommandFlag flags)
    00172 {
    00173   if (!IsShipDepot(tile)) return CMD_ERROR;
    00174
    00175   CommandCost ret = CheckTileOwnership(tile);
    00176   if (ret.Failed()) return ret;
    00177
    00178   TileIndex tile2 = GetOtherShipDepotTile(tile);
    00179
    00180   /* do not check for ship on tile when company goes bankrupt */
    00181   if (!(flags & DC_BANKRUPT)) {
    00182     CommandCost ret = EnsureNoVehicleOnGround(tile);
    00183     if (ret.Succeeded()) ret = EnsureNoVehicleOnGround(tile2);
    00184     if (ret.Failed()) return ret;
    00185   }
    00186
    00187   if (flags & DC_EXEC) {
    00188     delete Depot::GetByTile(tile);
    00189
    00190     MakeWaterKeepingClass(tile,  GetTileOwner(tile));
    00191     MakeWaterKeepingClass(tile2, GetTileOwner(tile2));
    00192   }
    00193
    00194   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_DEPOT_SHIP]);
    00195 }
    00196
    00204 static CommandCost DoBuildLock(TileIndex tile, DiagDirection dir, DoCommandFlag flags)
    00205 {
    00206   CommandCost cost(EXPENSES_CONSTRUCTION);
    00207
    00208   /* middle tile */
    00209   CommandCost ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00210   if (ret.Failed()) return ret;
    00211   cost.AddCost(ret);
    00212
    00213   int delta = TileOffsByDiagDir(dir);
    00214   /* lower tile */
    00215   WaterClass wc_lower = IsWaterTile(tile - delta) ? GetWaterClass(tile - delta) : WATER_CLASS_CANAL;
    00216
    00217   if (!IsWaterTile(tile - delta)) {
    00218     ret = DoCommand(tile - delta, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00219     if (ret.Failed()) return ret;
    00220     cost.AddCost(ret);
    00221     cost.AddCost(_price[PR_BUILD_CANAL]);
    00222   }
    00223   if (GetTileSlope(tile - delta, NULL) != SLOPE_FLAT) {
    00224     return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00225   }
    00226
    00227   /* upper tile */
    00228   WaterClass wc_upper = IsWaterTile(tile + delta) ? GetWaterClass(tile + delta) : WATER_CLASS_CANAL;
    00229
    00230   if (!IsWaterTile(tile + delta)) {
    00231     ret = DoCommand(tile + delta, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00232     if (ret.Failed()) return ret;
    00233     cost.AddCost(ret);
    00234     cost.AddCost(_price[PR_BUILD_CANAL]);
    00235   }
    00236   if (GetTileSlope(tile + delta, NULL) != SLOPE_FLAT) {
    00237     return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00238   }
    00239
    00240   if ((MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) ||
    00241       (MayHaveBridgeAbove(tile - delta) && IsBridgeAbove(tile - delta)) ||
    00242       (MayHaveBridgeAbove(tile + delta) && IsBridgeAbove(tile + delta))) {
    00243     return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    00244   }
    00245
    00246   if (flags & DC_EXEC) {
    00247     MakeLock(tile, _current_company, dir, wc_lower, wc_upper);
    00248     MarkTileDirtyByTile(tile);
    00249     MarkTileDirtyByTile(tile - delta);
    00250     MarkTileDirtyByTile(tile + delta);
    00251     MarkCanalsAndRiversAroundDirty(tile - delta);
    00252     MarkCanalsAndRiversAroundDirty(tile + delta);
    00253   }
    00254   cost.AddCost(_price[PR_BUILD_LOCK]);
    00255
    00256   return cost;
    00257 }
    00258
    00265 static CommandCost RemoveLock(TileIndex tile, DoCommandFlag flags)
    00266 {
    00267   if (GetTileOwner(tile) != OWNER_NONE) {
    00268     CommandCost ret = CheckTileOwnership(tile);
    00269     if (ret.Failed()) return ret;
    00270   }
    00271
    00272   TileIndexDiff delta = TileOffsByDiagDir(GetLockDirection(tile));
    00273
    00274   /* make sure no vehicle is on the tile. */
    00275   CommandCost ret = EnsureNoVehicleOnGround(tile);
    00276   if (ret.Succeeded()) ret = EnsureNoVehicleOnGround(tile + delta);
    00277   if (ret.Succeeded()) ret = EnsureNoVehicleOnGround(tile - delta);
    00278   if (ret.Failed()) return ret;
    00279
    00280   if (flags & DC_EXEC) {
    00281     DoClearSquare(tile);
    00282     MakeWaterKeepingClass(tile + delta, GetTileOwner(tile));
    00283     MakeWaterKeepingClass(tile - delta, GetTileOwner(tile));
    00284     MarkCanalsAndRiversAroundDirty(tile - delta);
    00285     MarkCanalsAndRiversAroundDirty(tile + delta);
    00286   }
    00287
    00288   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_LOCK]);
    00289 }
    00290
    00300 CommandCost CmdBuildLock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00301 {
    00302   DiagDirection dir = GetInclinedSlopeDirection(GetTileSlope(tile, NULL));
    00303   if (dir == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00304
    00305   /* Disallow building of locks on river rapids */
    00306   if (IsWaterTile(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    00307
    00308   return DoBuildLock(tile, dir, flags);
    00309 }
    00310
    00320 CommandCost CmdBuildCanal(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00321 {
    00322   WaterClass wc = Extract<WaterClass, 0, 2>(p2);
    00323   if (p1 >= MapSize() || wc == WATER_CLASS_INVALID) return CMD_ERROR;
    00324
    00325   /* Outside of the editor you can only build canals, not oceans */
    00326   if (wc != WATER_CLASS_CANAL && _game_mode != GM_EDITOR) return CMD_ERROR;
    00327
    00328   TileArea ta(tile, p1);
    00329
    00330   /* Outside the editor you can only drag canals, and not areas */
    00331   if (_game_mode != GM_EDITOR && ta.w != 1 && ta.h != 1) return CMD_ERROR;
    00332
    00333   CommandCost cost(EXPENSES_CONSTRUCTION);
    00334   TILE_AREA_LOOP(tile, ta) {
    00335     CommandCost ret;
    00336
    00337     Slope slope = GetTileSlope(tile, NULL);
    00338     if (slope != SLOPE_FLAT && (wc != WATER_CLASS_RIVER || !IsInclinedSlope(slope))) {
    00339       return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00340     }
    00341
    00342     /* can't make water of water! */
    00343     if (IsTileType(tile, MP_WATER) && (!IsTileOwner(tile, OWNER_WATER) || wc == WATER_CLASS_SEA)) continue;
    00344
    00345     ret = DoCommand(tile, 0, 0, flags | DC_FORCE_CLEAR_TILE, CMD_LANDSCAPE_CLEAR);
    00346     if (ret.Failed()) return ret;
    00347     cost.AddCost(ret);
    00348
    00349     if (flags & DC_EXEC) {
    00350       switch (wc) {
    00351         case WATER_CLASS_RIVER:
    00352           MakeRiver(tile, Random());
    00353           break;
    00354
    00355         case WATER_CLASS_SEA:
    00356           if (TileHeight(tile) == 0) {
    00357             MakeSea(tile);
    00358             break;
    00359           }
    00360           /* FALL THROUGH */
    00361
    00362         default:
    00363           MakeCanal(tile, _current_company, Random());
    00364           break;
    00365       }
    00366       MarkTileDirtyByTile(tile);
    00367       MarkCanalsAndRiversAroundDirty(tile);
    00368     }
    00369
    00370     cost.AddCost(_price[PR_BUILD_CANAL]);
    00371   }
    00372
    00373   if (cost.GetCost() == 0) {
    00374     return_cmd_error(STR_ERROR_ALREADY_BUILT);
    00375   } else {
    00376     return cost;
    00377   }
    00378 }
    00379
    00380 static CommandCost ClearTile_Water(TileIndex tile, DoCommandFlag flags)
    00381 {
    00382   switch (GetWaterTileType(tile)) {
    00383     case WATER_TILE_CLEAR: {
    00384       if (flags & DC_NO_WATER) return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
    00385
    00386       Money base_cost = IsCanal(tile) ? _price[PR_CLEAR_CANAL] : _price[PR_CLEAR_WATER];
    00387       /* Make sure freeform edges are allowed or it's not an edge tile. */
    00388       if (!_settings_game.construction.freeform_edges && (!IsInsideMM(TileX(tile), 1, MapMaxX() - 1) ||
    00389           !IsInsideMM(TileY(tile), 1, MapMaxY() - 1))) {
    00390         return_cmd_error(STR_ERROR_TOO_CLOSE_TO_EDGE_OF_MAP);
    00391       }
    00392
    00393       /* Make sure no vehicle is on the tile */
    00394       CommandCost ret = EnsureNoVehicleOnGround(tile);
    00395       if (ret.Failed()) return ret;
    00396
    00397       if (GetTileOwner(tile) != OWNER_WATER && GetTileOwner(tile) != OWNER_NONE) {
    00398         CommandCost ret = CheckTileOwnership(tile);
    00399         if (ret.Failed()) return ret;
    00400       }
    00401
    00402       if (flags & DC_EXEC) {
    00403         DoClearSquare(tile);
    00404         MarkCanalsAndRiversAroundDirty(tile);
    00405       }
    00406
    00407       return CommandCost(EXPENSES_CONSTRUCTION, base_cost);
    00408     }
    00409
    00410     case WATER_TILE_COAST: {
    00411       Slope slope = GetTileSlope(tile, NULL);
    00412
    00413       /* Make sure no vehicle is on the tile */
    00414       CommandCost ret = EnsureNoVehicleOnGround(tile);
    00415       if (ret.Failed()) return ret;
    00416
    00417       if (flags & DC_EXEC) {
    00418         DoClearSquare(tile);
    00419         MarkCanalsAndRiversAroundDirty(tile);
    00420       }
    00421       if (IsSlopeWithOneCornerRaised(slope)) {
    00422         return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_WATER]);
    00423       } else {
    00424         return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_ROUGH]);
    00425       }
    00426     }
    00427
    00428     case WATER_TILE_LOCK: {
    00429       static const TileIndexDiffC _lock_tomiddle_offs[] = {
    00430         { 0,  0}, {0,  0}, { 0, 0}, {0,  0}, // middle
    00431         {-1,  0}, {0,  1}, { 1, 0}, {0, -1}, // lower
    00432         { 1,  0}, {0, -1}, {-1, 0}, {0,  1}, // upper
    00433       };
    00434
    00435       if (flags & DC_AUTO) return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
    00436       if (_current_company == OWNER_WATER) return CMD_ERROR;
    00437       /* move to the middle tile.. */
    00438       return RemoveLock(tile + ToTileIndexDiff(_lock_tomiddle_offs[GetSection(tile)]), flags);
    00439     }
    00440
    00441     case WATER_TILE_DEPOT:
    00442       if (flags & DC_AUTO) return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
    00443       return RemoveShipDepot(tile, flags);
    00444
    00445     default:
    00446       NOT_REACHED();
    00447   }
    00448 }
    00449
    00458 static bool IsWateredTile(TileIndex tile, Direction from)
    00459 {
    00460   switch (GetTileType(tile)) {
    00461     case MP_WATER:
    00462       switch (GetWaterTileType(tile)) {
    00463         default: NOT_REACHED();
    00464         case WATER_TILE_DEPOT: case WATER_TILE_CLEAR: return true;
    00465         case WATER_TILE_LOCK: return DiagDirToAxis(GetLockDirection(tile)) == DiagDirToAxis(DirToDiagDir(from));
    00466
    00467         case WATER_TILE_COAST:
    00468           switch (GetTileSlope(tile, NULL)) {
    00469             case SLOPE_W: return (from == DIR_SE) || (from == DIR_E) || (from == DIR_NE);
    00470             case SLOPE_S: return (from == DIR_NE) || (from == DIR_N) || (from == DIR_NW);
    00471             case SLOPE_E: return (from == DIR_NW) || (from == DIR_W) || (from == DIR_SW);
    00472             case SLOPE_N: return (from == DIR_SW) || (from == DIR_S) || (from == DIR_SE);
    00473             default: return false;
    00474           }
    00475       }
    00476
    00477     case MP_RAILWAY:
    00478       if (GetRailGroundType(tile) == RAIL_GROUND_WATER) {
    00479         assert(IsPlainRail(tile));
    00480         switch (GetTileSlope(tile, NULL)) {
    00481           case SLOPE_W: return (from == DIR_SE) || (from == DIR_E) || (from == DIR_NE);
    00482           case SLOPE_S: return (from == DIR_NE) || (from == DIR_N) || (from == DIR_NW);
    00483           case SLOPE_E: return (from == DIR_NW) || (from == DIR_W) || (from == DIR_SW);
    00484           case SLOPE_N: return (from == DIR_SW) || (from == DIR_S) || (from == DIR_SE);
    00485           default: return false;
    00486         }
    00487       }
    00488       return false;
    00489
    00490     case MP_STATION:
    00491       if (IsOilRig(tile)) {
    00492         /* Do not draw waterborders inside of industries.
    00493          * Note: There is no easy way to detect the industry of an oilrig tile. */
    00494         TileIndex src_tile = tile + TileOffsByDir(from);
    00495         if ((IsTileType(src_tile, MP_STATION) && IsOilRig(src_tile)) ||
    00496             (IsTileType(src_tile, MP_INDUSTRY))) return true;
    00497
    00498         return IsTileOnWater(tile);
    00499       }
    00500       return (IsDock(tile) && GetTileSlope(tile, NULL) == SLOPE_FLAT) || IsBuoy(tile);
    00501
    00502     case MP_INDUSTRY: {
    00503       /* Do not draw waterborders inside of industries.
    00504        * Note: There is no easy way to detect the industry of an oilrig tile. */
    00505       TileIndex src_tile = tile + TileOffsByDir(from);
    00506       if ((IsTileType(src_tile, MP_STATION) && IsOilRig(src_tile)) ||
    00507           (IsTileType(src_tile, MP_INDUSTRY) && GetIndustryIndex(src_tile) == GetIndustryIndex(tile))) return true;
    00508
    00509       return IsTileOnWater(tile);
    00510     }
    00511
    00512     case MP_OBJECT: return IsTileOnWater(tile);
    00513
    00514     case MP_TUNNELBRIDGE: return GetTunnelBridgeTransportType(tile) == TRANSPORT_WATER && ReverseDiagDir(GetTunnelBridgeDirection(tile)) == DirToDiagDir(from);
    00515
    00516     default:          return false;
    00517   }
    00518 }
    00519
    00527 static void DrawWaterSprite(SpriteID base, uint offset, CanalFeature feature, TileIndex tile)
    00528 {
    00529   if (base != SPR_FLAT_WATER_TILE) {
    00530     /* Only call offset callback if the sprite is NewGRF-provided. */
    00531     offset = GetCanalSpriteOffset(feature, tile, offset);
    00532   }
    00533   DrawGroundSprite(base + offset, PAL_NONE);
    00534 }
    00535
    00542 static void DrawWaterEdges(bool canal, uint offset, TileIndex tile)
    00543 {
    00544   CanalFeature feature;
    00545   SpriteID base = 0;
    00546   if (canal) {
    00547     feature = CF_DIKES;
    00548     base = GetCanalSprite(CF_DIKES, tile);
    00549     if (base == 0) base = SPR_CANAL_DIKES_BASE;
    00550   } else {
    00551     feature = CF_RIVER_EDGE;
    00552     base = GetCanalSprite(CF_RIVER_EDGE, tile);
    00553     if (base == 0) return; // Don't draw if no sprites provided.
    00554   }
    00555
    00556   uint wa;
    00557
    00558   /* determine the edges around with water. */
    00559   wa  = IsWateredTile(TILE_ADDXY(tile, -1,  0), DIR_SW) << 0;
    00560   wa += IsWateredTile(TILE_ADDXY(tile,  0,  1), DIR_NW) << 1;
    00561   wa += IsWateredTile(TILE_ADDXY(tile,  1,  0), DIR_NE) << 2;
    00562   wa += IsWateredTile(TILE_ADDXY(tile,  0, -1), DIR_SE) << 3;
    00563
    00564   if (!(wa & 1)) DrawWaterSprite(base, offset,     feature, tile);
    00565   if (!(wa & 2)) DrawWaterSprite(base, offset + 1, feature, tile);
    00566   if (!(wa & 4)) DrawWaterSprite(base, offset + 2, feature, tile);
    00567   if (!(wa & 8)) DrawWaterSprite(base, offset + 3, feature, tile);
    00568
    00569   /* right corner */
    00570   switch (wa & 0x03) {
    00571     case 0: DrawWaterSprite(base, offset + 4, feature, tile); break;
    00572     case 3: if (!IsWateredTile(TILE_ADDXY(tile, -1, 1), DIR_W)) DrawWaterSprite(base, offset + 8, feature, tile); break;
    00573   }
    00574
    00575   /* bottom corner */
    00576   switch (wa & 0x06) {
    00577     case 0: DrawWaterSprite(base, offset + 5, feature, tile); break;
    00578     case 6: if (!IsWateredTile(TILE_ADDXY(tile, 1, 1), DIR_N)) DrawWaterSprite(base, offset + 9, feature, tile); break;
    00579   }
    00580
    00581   /* left corner */
    00582   switch (wa & 0x0C) {
    00583     case  0: DrawWaterSprite(base, offset + 6, feature, tile); break;
    00584     case 12: if (!IsWateredTile(TILE_ADDXY(tile, 1, -1), DIR_E)) DrawWaterSprite(base, offset + 10, feature, tile); break;
    00585   }
    00586
    00587   /* upper corner */
    00588   switch (wa & 0x09) {
    00589     case 0: DrawWaterSprite(base, offset + 7, feature, tile); break;
    00590     case 9: if (!IsWateredTile(TILE_ADDXY(tile, -1, -1), DIR_S)) DrawWaterSprite(base, offset + 11, feature, tile); break;
    00591   }
    00592 }
    00593
    00595 static void DrawSeaWater(TileIndex tile)
    00596 {
    00597   DrawGroundSprite(SPR_FLAT_WATER_TILE, PAL_NONE);
    00598 }
    00599
    00601 static void DrawCanalWater(TileIndex tile)
    00602 {
    00603   SpriteID image = SPR_FLAT_WATER_TILE;
    00604   if (HasBit(_water_feature[CF_WATERSLOPE].flags, CFF_HAS_FLAT_SPRITE)) {
    00605     /* First water slope sprite is flat water. */
    00606     image = GetCanalSprite(CF_WATERSLOPE, tile);
    00607     if (image == 0) image = SPR_FLAT_WATER_TILE;
    00608   }
    00609   DrawWaterSprite(image, 0, CF_WATERSLOPE, tile);
    00610
    00611   DrawWaterEdges(true, 0, tile);
    00612 }
    00613
    00614 struct LocksDrawTileStruct {
    00615   int8 delta_x, delta_y, delta_z;
    00616   byte width, height, depth;
    00617   SpriteID image;
    00618 };
    00619
    00620 #include "table/water_land.h"
    00621
    00631 static void DrawWaterTileStruct(const TileInfo *ti, const WaterDrawTileStruct *wdts, SpriteID base, uint offset, PaletteID palette, CanalFeature feature)
    00632 {
    00633   /* Don't draw if buildings are invisible. */
    00634   if (IsInvisibilitySet(TO_BUILDINGS)) return;
    00635
    00636   for (; wdts->delta_x != 0x80; wdts++) {
    00637     uint tile_offs = offset + wdts->image;
    00638     if (feature < CF_END) tile_offs = GetCanalSpriteOffset(feature, ti->tile, tile_offs);
    00639     AddSortableSpriteToDraw(base + tile_offs, palette,
    00640       ti->x + wdts->delta_x, ti->y + wdts->delta_y,
    00641       wdts->size_x, wdts->size_y,
    00642       wdts->size_z, ti->z + wdts->delta_z,
    00643       IsTransparencySet(TO_BUILDINGS));
    00644   }
    00645 }
    00646
    00648 static void DrawWaterLock(const TileInfo *ti)
    00649 {
    00650   const WaterDrawTileStruct *wdts = _lock_display_seq[GetSection(ti->tile)];
    00651
    00652   /* Draw ground sprite. */
    00653   SpriteID image = wdts++->image;
    00654
    00655   SpriteID water_base = GetCanalSprite(CF_WATERSLOPE, ti->tile);
    00656   if (water_base == 0) {
    00657     /* Use default sprites. */
    00658     water_base = SPR_CANALS_BASE;
    00659   } else if (HasBit(_water_feature[CF_WATERSLOPE].flags, CFF_HAS_FLAT_SPRITE)) {
    00660     /* NewGRF supplies a flat sprite as first sprite. */
    00661     if (image == SPR_FLAT_WATER_TILE) {
    00662       image = water_base;
    00663     } else {
    00664       image++;
    00665     }
    00666   }
    00667
    00668   if (image < 5) image += water_base;
    00669   DrawGroundSprite(image, PAL_NONE);
    00670
    00671   /* Draw structures. */
    00672   uint     zoffs = 0;
    00673   SpriteID base  = GetCanalSprite(CF_LOCKS, ti->tile);
    00674
    00675   if (base == 0) {
    00676     /* If no custom graphics, use defaults. */
    00677     base = SPR_LOCK_BASE;
    00678     zoffs = ti->z > wdts[3].delta_y ? 24 : 0;
    00679   }
    00680
    00681   DrawWaterTileStruct(ti, wdts, base, zoffs, PAL_NONE, CF_LOCKS);
    00682 }
    00683
    00685 static void DrawWaterDepot(const TileInfo *ti)
    00686 {
    00687   DrawWaterClassGround(ti);
    00688   /* Skip first entry in _shipdepot_display_seq as this is the ground sprite. */
    00689   DrawWaterTileStruct(ti, _shipdepot_display_seq[GetSection(ti->tile)] + 1, 0, 0, COMPANY_SPRITE_COLOUR(GetTileOwner(ti->tile)), CF_END);
    00690 }
    00691
    00692 static void DrawRiverWater(const TileInfo *ti)
    00693 {
    00694   SpriteID image = SPR_FLAT_WATER_TILE;
    00695   uint     offset = 0;
    00696   uint     edges_offset = 0;
    00697
    00698   if (ti->tileh != SLOPE_FLAT || HasBit(_water_feature[CF_RIVER_SLOPE].flags, CFF_HAS_FLAT_SPRITE)) {
    00699     image = GetCanalSprite(CF_RIVER_SLOPE, ti->tile);
    00700     if (image == 0) {
    00701       switch (ti->tileh) {
    00702         case SLOPE_NW: image = SPR_WATER_SLOPE_Y_DOWN; break;
    00703         case SLOPE_SW: image = SPR_WATER_SLOPE_X_UP;   break;
    00704         case SLOPE_SE: image = SPR_WATER_SLOPE_Y_UP;   break;
    00705         case SLOPE_NE: image = SPR_WATER_SLOPE_X_DOWN; break;
    00706         default:       image = SPR_FLAT_WATER_TILE;    break;
    00707       }
    00708     } else {
    00709       /* Flag bit 0 indicates that the first sprite is flat water. */
    00710       offset = HasBit(_water_feature[CF_RIVER_SLOPE].flags, CFF_HAS_FLAT_SPRITE) ? 1 : 0;
    00711
    00712       switch (ti->tileh) {
    00713         case SLOPE_SE:              edges_offset += 12; break;
    00714         case SLOPE_NE: offset += 1; edges_offset += 24; break;
    00715         case SLOPE_SW: offset += 2; edges_offset += 36; break;
    00716         case SLOPE_NW: offset += 3; edges_offset += 48; break;
    00717         default:       offset  = 0; break;
    00718       }
    00719
    00720       offset = GetCanalSpriteOffset(CF_RIVER_SLOPE, ti->tile, offset);
    00721     }
    00722   }
    00723
    00724   DrawGroundSprite(image + offset, PAL_NONE);
    00725
    00726   /* Draw river edges if available. */
    00727   DrawWaterEdges(false, edges_offset, ti->tile);
    00728 }
    00729
    00730 void DrawShoreTile(Slope tileh)
    00731 {
    00732   /* Converts the enum Slope into an offset based on SPR_SHORE_BASE.
    00733    * This allows to calculate the proper sprite to display for this Slope */
    00734   static const byte tileh_to_shoresprite[32] = {
    00735     0, 1, 2, 3, 4, 16, 6, 7, 8, 9, 17, 11, 12, 13, 14, 0,
    00736     0, 0, 0, 0, 0,  0, 0, 0, 0, 0,  0,  5,  0, 10, 15, 0,
    00737   };
    00738
    00739   assert(!IsHalftileSlope(tileh)); // Halftile slopes need to get handled earlier.
    00740   assert(tileh != SLOPE_FLAT);     // Shore is never flat
    00741
    00742   assert((tileh != SLOPE_EW) && (tileh != SLOPE_NS)); // No suitable sprites for current flooding behaviour
    00743
    00744   DrawGroundSprite(SPR_SHORE_BASE + tileh_to_shoresprite[tileh], PAL_NONE);
    00745 }
    00746
    00747 void DrawWaterClassGround(const TileInfo *ti)
    00748 {
    00749   switch (GetWaterClass(ti->tile)) {
    00750     case WATER_CLASS_SEA:   DrawSeaWater(ti->tile); break;
    00751     case WATER_CLASS_CANAL: DrawCanalWater(ti->tile); break;
    00752     case WATER_CLASS_RIVER: DrawRiverWater(ti); break;
    00753     default: NOT_REACHED();
    00754   }
    00755 }
    00756
    00757 static void DrawTile_Water(TileInfo *ti)
    00758 {
    00759   switch (GetWaterTileType(ti->tile)) {
    00760     case WATER_TILE_CLEAR:
    00761       DrawWaterClassGround(ti);
    00762       DrawBridgeMiddle(ti);
    00763       break;
    00764
    00765     case WATER_TILE_COAST: {
    00766       DrawShoreTile(ti->tileh);
    00767       DrawBridgeMiddle(ti);
    00768       break;
    00769     }
    00770
    00771     case WATER_TILE_LOCK:
    00772       DrawWaterLock(ti);
    00773       break;
    00774
    00775     case WATER_TILE_DEPOT:
    00776       DrawWaterDepot(ti);
    00777       break;
    00778   }
    00779 }
    00780
    00781 void DrawShipDepotSprite(int x, int y, int image)
    00782 {
    00783   const WaterDrawTileStruct *wdts = _shipdepot_display_seq[image];
    00784
    00785   DrawSprite(wdts++->image, PAL_NONE, x, y);
    00786
    00787   for (; wdts->delta_x != 0x80; wdts++) {
    00788     Point pt = RemapCoords(wdts->delta_x, wdts->delta_y, wdts->delta_z);
    00789     DrawSprite(wdts->image, COMPANY_SPRITE_COLOUR(_local_company), x + pt.x, y + pt.y);
    00790   }
    00791 }
    00792
    00793
    00794 static uint GetSlopeZ_Water(TileIndex tile, uint x, uint y)
    00795 {
    00796   uint z;
    00797   Slope tileh = GetTileSlope(tile, &z);
    00798
    00799   return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
    00800 }
    00801
    00802 static Foundation GetFoundation_Water(TileIndex tile, Slope tileh)
    00803 {
    00804   return FOUNDATION_NONE;
    00805 }
    00806
    00807 static void GetTileDesc_Water(TileIndex tile, TileDesc *td)
    00808 {
    00809   switch (GetWaterTileType(tile)) {
    00810     case WATER_TILE_CLEAR:
    00811       switch (GetWaterClass(tile)) {
    00812         case WATER_CLASS_SEA:   td->str = STR_LAI_WATER_DESCRIPTION_WATER; break;
    00813         case WATER_CLASS_CANAL: td->str = STR_LAI_WATER_DESCRIPTION_CANAL; break;
    00814         case WATER_CLASS_RIVER: td->str = STR_LAI_WATER_DESCRIPTION_RIVER; break;
    00815         default: NOT_REACHED(); break;
    00816       }
    00817       break;
    00818     case WATER_TILE_COAST: td->str = STR_LAI_WATER_DESCRIPTION_COAST_OR_RIVERBANK; break;
    00819     case WATER_TILE_LOCK : td->str = STR_LAI_WATER_DESCRIPTION_LOCK;               break;
    00820     case WATER_TILE_DEPOT:
    00821       td->str = STR_LAI_WATER_DESCRIPTION_SHIP_DEPOT;
    00822       td->build_date = Depot::GetByTile(tile)->build_date;
    00823       break;
    00824     default: NOT_REACHED(); break;
    00825   }
    00826
    00827   td->owner[0] = GetTileOwner(tile);
    00828 }
    00829
    00835 static void FloodVehicle(Vehicle *v)
    00836 {
    00837   uint pass = v->Crash(true);
    00838
    00839   AI::NewEvent(v->owner, new AIEventVehicleCrashed(v->index, v->tile, AIEventVehicleCrashed::CRASH_FLOODED));
    00840   SetDParam(0, pass);
    00841   AddVehicleNewsItem(STR_NEWS_DISASTER_FLOOD_VEHICLE, NS_ACCIDENT, v->index);
    00842   CreateEffectVehicleRel(v, 4, 4, 8, EV_EXPLOSION_LARGE);
    00843   SndPlayVehicleFx(SND_12_EXPLOSION, v);
    00844 }
    00845
    00852 static Vehicle *FloodVehicleProc(Vehicle *v, void *data)
    00853 {
    00854   if ((v->vehstatus & VS_CRASHED) != 0) return NULL;
    00855
    00856   switch (v->type) {
    00857     default: break;
    00858
    00859     case VEH_AIRCRAFT: {
    00860       if (!IsAirportTile(v->tile) || GetTileMaxZ(v->tile) != 0) break;
    00861       if (v->subtype == AIR_SHADOW) break;
    00862
    00863       /* We compare v->z_pos against delta_z + 1 because the shadow
    00864        * is at delta_z and the actual aircraft at delta_z + 1. */
    00865       const Station *st = Station::GetByTile(v->tile);
    00866       const AirportFTAClass *airport = st->airport.GetFTA();
    00867       if (v->z_pos != airport->delta_z + 1) break;
    00868
    00869       FloodVehicle(v);
    00870       break;
    00871     }
    00872
    00873     case VEH_TRAIN:
    00874     case VEH_ROAD: {
    00875       byte z = *(byte*)data;
    00876       if (v->z_pos > z) break;
    00877       FloodVehicle(v->First());
    00878       break;
    00879     }
    00880   }
    00881
    00882   return NULL;
    00883 }
    00884
    00890 static void FloodVehicles(TileIndex tile)
    00891 {
    00892   byte z = 0;
    00893
    00894   if (IsAirportTile(tile)) {
    00895     const Station *st = Station::GetByTile(tile);
    00896     TILE_AREA_LOOP(tile, st->airport) {
    00897       if (st->TileBelongsToAirport(tile)) FindVehicleOnPos(tile, &z, &FloodVehicleProc);
    00898     }
    00899
    00900     /* No vehicle could be flooded on this airport anymore */
    00901     return;
    00902   }
    00903
    00904   if (!IsBridgeTile(tile)) {
    00905     FindVehicleOnPos(tile, &z, &FloodVehicleProc);
    00906     return;
    00907   }
    00908
    00909   TileIndex end = GetOtherBridgeEnd(tile);
    00910   z = GetBridgeHeight(tile);
    00911
    00912   FindVehicleOnPos(tile, &z, &FloodVehicleProc);
    00913   FindVehicleOnPos(end, &z, &FloodVehicleProc);
    00914 }
    00915
    00921 FloodingBehaviour GetFloodingBehaviour(TileIndex tile)
    00922 {
    00923   /* FLOOD_ACTIVE:  'single-corner-raised'-coast, sea, sea-shipdepots, sea-buoys, sea-docks (water part), rail with flooded halftile, sea-water-industries, sea-oilrigs
    00924    * FLOOD_DRYUP:   coast with more than one corner raised, coast with rail-track, coast with trees
    00925    * FLOOD_PASSIVE: (not used)
    00926    * FLOOD_NONE:    canals, rivers, everything else
    00927    */
    00928   switch (GetTileType(tile)) {
    00929     case MP_WATER:
    00930       if (IsCoast(tile)) {
    00931         Slope tileh = GetTileSlope(tile, NULL);
    00932         return (IsSlopeWithOneCornerRaised(tileh) ? FLOOD_ACTIVE : FLOOD_DRYUP);
    00933       }
    00934       /* FALL THROUGH */
    00935     case MP_STATION:
    00936     case MP_INDUSTRY:
    00937     case MP_OBJECT:
    00938       return (GetWaterClass(tile) == WATER_CLASS_SEA) ? FLOOD_ACTIVE : FLOOD_NONE;
    00939
    00940     case MP_RAILWAY:
    00941       if (GetRailGroundType(tile) == RAIL_GROUND_WATER) {
    00942         return (IsSlopeWithOneCornerRaised(GetTileSlope(tile, NULL)) ? FLOOD_ACTIVE : FLOOD_DRYUP);
    00943       }
    00944       return FLOOD_NONE;
    00945
    00946     case MP_TREES:
    00947       return (GetTreeGround(tile) == TREE_GROUND_SHORE ? FLOOD_DRYUP : FLOOD_NONE);
    00948
    00949     default:
    00950       return FLOOD_NONE;
    00951   }
    00952 }
    00953
    00957 void DoFloodTile(TileIndex target)
    00958 {
    00959   assert(!IsTileType(target, MP_WATER));
    00960
    00961   bool flooded = false; // Will be set to true if something is changed.
    00962
    00963   Backup<CompanyByte> cur_company(_current_company, OWNER_WATER, FILE_LINE);
    00964
    00965   Slope tileh = GetTileSlope(target, NULL);
    00966   if (tileh != SLOPE_FLAT) {
    00967     /* make coast.. */
    00968     switch (GetTileType(target)) {
    00969       case MP_RAILWAY: {
    00970         if (!IsPlainRail(target)) break;
    00971         FloodVehicles(target);
    00972         flooded = FloodHalftile(target);
    00973         break;
    00974       }
    00975
    00976       case MP_TREES:
    00977         if (!IsSlopeWithOneCornerRaised(tileh)) {
    00978           SetTreeGroundDensity(target, TREE_GROUND_SHORE, 3);
    00979           MarkTileDirtyByTile(target);
    00980           flooded = true;
    00981           break;
    00982         }
    00983         /* FALL THROUGH */
    00984
    00985       case MP_CLEAR:
    00986         if (DoCommand(target, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR).Succeeded()) {
    00987           MakeShore(target);
    00988           MarkTileDirtyByTile(target);
    00989           flooded = true;
    00990         }
    00991         break;
    00992
    00993       default:
    00994         break;
    00995     }
    00996   } else {
    00997     /* Flood vehicles */
    00998     FloodVehicles(target);
    00999
    01000     /* flood flat tile */
    01001     if (DoCommand(target, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR).Succeeded()) {
    01002       MakeSea(target);
    01003       MarkTileDirtyByTile(target);
    01004       flooded = true;
    01005     }
    01006   }
    01007
    01008   if (flooded) {
    01009     /* Mark surrounding canal tiles dirty too to avoid glitches */
    01010     MarkCanalsAndRiversAroundDirty(target);
    01011
    01012     /* update signals if needed */
    01013     UpdateSignalsInBuffer();
    01014   }
    01015
    01016   cur_company.Restore();
    01017 }
    01018
    01022 static void DoDryUp(TileIndex tile)
    01023 {
    01024   Backup<CompanyByte> cur_company(_current_company, OWNER_WATER, FILE_LINE);
    01025
    01026   switch (GetTileType(tile)) {
    01027     case MP_RAILWAY:
    01028       assert(IsPlainRail(tile));
    01029       assert(GetRailGroundType(tile) == RAIL_GROUND_WATER);
    01030
    01031       RailGroundType new_ground;
    01032       switch (GetTrackBits(tile)) {
    01033         case TRACK_BIT_UPPER: new_ground = RAIL_GROUND_FENCE_HORIZ1; break;
    01034         case TRACK_BIT_LOWER: new_ground = RAIL_GROUND_FENCE_HORIZ2; break;
    01035         case TRACK_BIT_LEFT:  new_ground = RAIL_GROUND_FENCE_VERT1;  break;
    01036         case TRACK_BIT_RIGHT: new_ground = RAIL_GROUND_FENCE_VERT2;  break;
    01037         default: NOT_REACHED();
    01038       }
    01039       SetRailGroundType(tile, new_ground);
    01040       MarkTileDirtyByTile(tile);
    01041       break;
    01042
    01043     case MP_TREES:
    01044       SetTreeGroundDensity(tile, TREE_GROUND_GRASS, 3);
    01045       MarkTileDirtyByTile(tile);
    01046       break;
    01047
    01048     case MP_WATER:
    01049       assert(IsCoast(tile));
    01050
    01051       if (DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR).Succeeded()) {
    01052         MakeClear(tile, CLEAR_GRASS, 3);
    01053         MarkTileDirtyByTile(tile);
    01054       }
    01055       break;
    01056
    01057     default: NOT_REACHED();
    01058   }
    01059
    01060   cur_company.Restore();
    01061 }
    01062
    01069 void TileLoop_Water(TileIndex tile)
    01070 {
    01071   switch (GetFloodingBehaviour(tile)) {
    01072     case FLOOD_ACTIVE:
    01073       for (Direction dir = DIR_BEGIN; dir < DIR_END; dir++) {
    01074         TileIndex dest = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDir(dir));
    01075         if (dest == INVALID_TILE) continue;
    01076         /* do not try to flood water tiles - increases performance a lot */
    01077         if (IsTileType(dest, MP_WATER)) continue;
    01078
    01079         uint z_dest;
    01080         Slope slope_dest = GetFoundationSlope(dest, &z_dest) & ~SLOPE_HALFTILE_MASK & ~SLOPE_STEEP;
    01081         if (z_dest > 0) continue;
    01082
    01083         if (!HasBit(_flood_from_dirs[slope_dest], ReverseDir(dir))) continue;
    01084
    01085         DoFloodTile(dest);
    01086       }
    01087       break;
    01088
    01089     case FLOOD_DRYUP: {
    01090       Slope slope_here = GetFoundationSlope(tile, NULL) & ~SLOPE_HALFTILE_MASK & ~SLOPE_STEEP;
    01091       uint dir;
    01092       FOR_EACH_SET_BIT(dir, _flood_from_dirs[slope_here]) {
    01093         TileIndex dest = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDir((Direction)dir));
    01094         if (dest == INVALID_TILE) continue;
    01095
    01096         FloodingBehaviour dest_behaviour = GetFloodingBehaviour(dest);
    01097         if ((dest_behaviour == FLOOD_ACTIVE) || (dest_behaviour == FLOOD_PASSIVE)) return;
    01098       }
    01099       DoDryUp(tile);
    01100       break;
    01101     }
    01102
    01103     default: return;
    01104   }
    01105 }
    01106
    01107 void ConvertGroundTilesIntoWaterTiles()
    01108 {
    01109   uint z;
    01110
    01111   for (TileIndex tile = 0; tile < MapSize(); ++tile) {
    01112     Slope slope = GetTileSlope(tile, &z);
    01113     if (IsTileType(tile, MP_CLEAR) && z == 0) {
    01114       /* Make both water for tiles at level 0
    01115        * and make shore, as that looks much better
    01116        * during the generation. */
    01117       switch (slope) {
    01118         case SLOPE_FLAT:
    01119           MakeSea(tile);
    01120           break;
    01121
    01122         case SLOPE_N:
    01123         case SLOPE_E:
    01124         case SLOPE_S:
    01125         case SLOPE_W:
    01126           MakeShore(tile);
    01127           break;
    01128
    01129         default:
    01130           uint dir;
    01131           FOR_EACH_SET_BIT(dir, _flood_from_dirs[slope & ~SLOPE_STEEP]) {
    01132             TileIndex dest = TILE_ADD(tile, TileOffsByDir((Direction)dir));
    01133             Slope slope_dest = GetTileSlope(dest, NULL) & ~SLOPE_STEEP;
    01134             if (slope_dest == SLOPE_FLAT || IsSlopeWithOneCornerRaised(slope_dest)) {
    01135               MakeShore(tile);
    01136               break;
    01137             }
    01138           }
    01139           break;
    01140       }
    01141     }
    01142   }
    01143 }
    01144
    01145 static TrackStatus GetTileTrackStatus_Water(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
    01146 {
    01147   static const byte coast_tracks[] = {0, 32, 4, 0, 16, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0};
    01148
    01149   TrackBits ts;
    01150
    01151   if (mode != TRANSPORT_WATER) return 0;
    01152
    01153   switch (GetWaterTileType(tile)) {
    01154     case WATER_TILE_CLEAR: ts = (GetTileSlope(tile, NULL) == SLOPE_FLAT) ? TRACK_BIT_ALL : TRACK_BIT_NONE; break;
    01155     case WATER_TILE_COAST: ts = (TrackBits)coast_tracks[GetTileSlope(tile, NULL) & 0xF]; break;
    01156     case WATER_TILE_LOCK:  ts = DiagDirToDiagTrackBits(GetLockDirection(tile)); break;
    01157     case WATER_TILE_DEPOT: ts = AxisToTrackBits(GetShipDepotAxis(tile)); break;
    01158     default: return 0;
    01159   }
    01160   if (TileX(tile) == 0) {
    01161     /* NE border: remove tracks that connects NE tile edge */
    01162     ts &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
    01163   }
    01164   if (TileY(tile) == 0) {
    01165     /* NW border: remove tracks that connects NW tile edge */
    01166     ts &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
    01167   }
    01168   return CombineTrackStatus(TrackBitsToTrackdirBits(ts), TRACKDIR_BIT_NONE);
    01169 }
    01170
    01171 static bool ClickTile_Water(TileIndex tile)
    01172 {
    01173   if (GetWaterTileType(tile) == WATER_TILE_DEPOT) {
    01174     ShowDepotWindow(GetShipDepotNorthTile(tile), VEH_SHIP);
    01175     return true;
    01176   }
    01177   return false;
    01178 }
    01179
    01180 static void ChangeTileOwner_Water(TileIndex tile, Owner old_owner, Owner new_owner)
    01181 {
    01182   if (!IsTileOwner(tile, old_owner)) return;
    01183
    01184   if (new_owner != INVALID_OWNER) {
    01185     SetTileOwner(tile, new_owner);
    01186     return;
    01187   }
    01188
    01189   /* Remove depot */
    01190   if (IsShipDepot(tile)) DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
    01191
    01192   /* Set owner of canals and locks ... and also canal under dock there was before.
    01193    * Check if the new owner after removing depot isn't OWNER_WATER. */
    01194   if (IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
    01195 }
    01196
    01197 static VehicleEnterTileStatus VehicleEnter_Water(Vehicle *v, TileIndex tile, int x, int y)
    01198 {
    01199   return VETSB_CONTINUE;
    01200 }
    01201
    01202 static CommandCost TerraformTile_Water(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
    01203 {
    01204   /* Canals can't be terraformed */
    01205   if (IsWaterTile(tile) && IsCanal(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_CANAL_FIRST);
    01206
    01207   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    01208 }
    01209
    01210
    01211 extern const TileTypeProcs _tile_type_water_procs = {
    01212   DrawTile_Water,           // draw_tile_proc
    01213   GetSlopeZ_Water,          // get_slope_z_proc
    01214   ClearTile_Water,          // clear_tile_proc
    01215   NULL,                     // add_accepted_cargo_proc
    01216   GetTileDesc_Water,        // get_tile_desc_proc
    01217   GetTileTrackStatus_Water, // get_tile_track_status_proc
    01218   ClickTile_Water,          // click_tile_proc
    01219   NULL,                     // animate_tile_proc
    01220   TileLoop_Water,           // tile_loop_clear
    01221   ChangeTileOwner_Water,    // change_tile_owner_clear
    01222   NULL,                     // add_produced_cargo_proc
    01223   VehicleEnter_Water,       // vehicle_enter_tile_proc
    01224   GetFoundation_Water,      // get_foundation_proc
    01225   TerraformTile_Water,      // terraform_tile_proc
    01226 };