# object_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 "landscape.h"
    00014 #include "command_func.h"
    00015 #include "viewport_func.h"
    00016 #include "company_base.h"
    00017 #include "town.h"
    00018 #include "bridge_map.h"
    00019 #include "genworld.h"
    00020 #include "autoslope.h"
    00021 #include "clear_func.h"
    00022 #include "water.h"
    00023 #include "window_func.h"
    00024 #include "company_gui.h"
    00025 #include "cheat_type.h"
    00026 #include "object.h"
    00027 #include "cargopacket.h"
    00028 #include "sprite.h"
    00029 #include "core/random_func.hpp"
    00030 #include "core/pool_func.hpp"
    00031 #include "object_map.h"
    00032 #include "object_base.h"
    00033 #include "newgrf_config.h"
    00034 #include "newgrf_object.h"
    00035 #include "date_func.h"
    00036 #include "newgrf_debug.h"
    00037
    00038 #include "table/strings.h"
    00039 #include "table/object_land.h"
    00040
    00041 ObjectPool _object_pool("Object");
    00042 INSTANTIATE_POOL_METHODS(Object)
    00043 uint16 Object::counts[NUM_OBJECTS];
    00044
    00050 /* static */ Object *Object::GetByTile(TileIndex tile)
    00051 {
    00052   return Object::Get(GetObjectIndex(tile));
    00053 }
    00054
    00056 void InitializeObjects()
    00057 {
    00058   Object::ResetTypeCounts();
    00059 }
    00060
    00071 void BuildObject(ObjectType type, TileIndex tile, CompanyID owner, Town *town, uint8 view)
    00072 {
    00073   const ObjectSpec *spec = ObjectSpec::Get(type);
    00074
    00075   TileArea ta(tile, GB(spec->size, HasBit(view, 0) ? 4 : 0, 4), GB(spec->size, HasBit(view, 0) ? 0 : 4, 4));
    00076   Object *o = new Object();
    00077   o->location      = ta;
    00078   o->town          = town == NULL ? CalcClosestTownFromTile(tile) : town;
    00079   o->build_date    = _date;
    00080   o->view          = view;
    00081
    00082   /* If nothing owns the object, the colour will be random. Otherwise
    00083    * get the colour from the company's livery settings. */
    00084   if (owner == OWNER_NONE) {
    00085     o->colour = Random();
    00086   } else {
    00087     const Livery *l = Company::Get(owner)->livery;
    00088     o->colour = l->colour1 + l->colour2 * 16;
    00089   }
    00090
    00091   /* If the object wants only one colour, then give it that colour. */
    00092   if ((spec->flags & OBJECT_FLAG_2CC_COLOUR) == 0) o->colour &= 0xF;
    00093
    00094   if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) {
    00095     uint16 res = GetObjectCallback(CBID_OBJECT_COLOUR, o->colour, 0, spec, o, tile);
    00096     if (res != CALLBACK_FAILED) o->colour = GB(res, 0, 8);
    00097   }
    00098
    00099   assert(o->town != NULL);
    00100
    00101   TILE_AREA_LOOP(t, ta) {
    00102     WaterClass wc = (IsWaterTile(t) ? GetWaterClass(t) : WATER_CLASS_INVALID);
    00103     MakeObject(t, type, owner, o->index, wc, Random());
    00104     MarkTileDirtyByTile(t);
    00105   }
    00106
    00107   Object::IncTypeCount(type);
    00108   if (spec->flags & OBJECT_FLAG_ANIMATION) TriggerObjectAnimation(o, OAT_BUILT, spec);
    00109 }
    00110
    00115 static void IncreaseAnimationStage(TileIndex tile)
    00116 {
    00117   TileArea ta = Object::GetByTile(tile)->location;
    00118   TILE_AREA_LOOP(t, ta) {
    00119     SetAnimationFrame(t, GetAnimationFrame(t) + 1);
    00120     MarkTileDirtyByTile(t);
    00121   }
    00122 }
    00123
    00125 #define GetCompanyHQSize GetAnimationFrame
    00126
    00127 #define IncreaseCompanyHQSize IncreaseAnimationStage
    00128
    00134 void UpdateCompanyHQ(TileIndex tile, uint score)
    00135 {
    00136   if (tile == INVALID_TILE) return;
    00137
    00138   byte val;
    00139   (val = 0, score < 170) ||
    00140   (val++, score < 350) ||
    00141   (val++, score < 520) ||
    00142   (val++, score < 720) ||
    00143   (val++, true);
    00144
    00145   while (GetCompanyHQSize(tile) < val) {
    00146     IncreaseCompanyHQSize(tile);
    00147   }
    00148 }
    00149
    00154 void UpdateObjectColours(const Company *c)
    00155 {
    00156   Object *obj;
    00157   FOR_ALL_OBJECTS(obj) {
    00158     Owner owner = GetTileOwner(obj->location.tile);
    00159     /* Not the current owner, so colour doesn't change. */
    00160     if (owner != c->index) continue;
    00161
    00162     const ObjectSpec *spec = ObjectSpec::GetByTile(obj->location.tile);
    00163     /* Using the object colour callback, so not using company colour. */
    00164     if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) continue;
    00165
    00166     const Livery *l = c->livery;
    00167     obj->colour = ((spec->flags & OBJECT_FLAG_2CC_COLOUR) ? (l->colour2 * 16) : 0) + l->colour1;
    00168   }
    00169 }
    00170
    00171 extern CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool check_bridge);
    00172 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags);
    00173
    00183 CommandCost CmdBuildObject(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00184 {
    00185   CommandCost cost(EXPENSES_PROPERTY);
    00186
    00187   ObjectType type = (ObjectType)GB(p1, 0, 8);
    00188   uint8 view = GB(p2, 0, 2);
    00189   const ObjectSpec *spec = ObjectSpec::Get(type);
    00190   if (!spec->IsAvailable()) return CMD_ERROR;
    00191
    00192   if (spec->flags & OBJECT_FLAG_ONLY_IN_SCENEDIT && (_game_mode != GM_EDITOR || _current_company != OWNER_NONE)) return CMD_ERROR;
    00193   if (spec->flags & OBJECT_FLAG_ONLY_IN_GAME && (_game_mode != GM_NORMAL || _current_company > MAX_COMPANIES)) return CMD_ERROR;
    00194   if (view >= spec->views) return CMD_ERROR;
    00195
    00196   if (!Object::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_OBJECTS);
    00197   if (Town::GetNumItems() == 0) return_cmd_error(STR_ERROR_MUST_FOUND_TOWN_FIRST);
    00198
    00199   int size_x = GB(spec->size, HasBit(view, 0) ? 4 : 0, 4);
    00200   int size_y = GB(spec->size, HasBit(view, 0) ? 0 : 4, 4);
    00201   TileArea ta(tile, size_x, size_y);
    00202
    00203   if (type == OBJECT_OWNED_LAND) {
    00204     /* Owned land is special as it can be placed on any slope. */
    00205     cost.AddCost(DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
    00206   } else {
    00207     /* Check the surface to build on. */
    00208     bool allow_water = (spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0;
    00209     bool allow_ground = (spec->flags & OBJECT_FLAG_NOT_ON_LAND) == 0;
    00210     TILE_AREA_LOOP(t, ta) {
    00211       if (HasTileWaterGround(t)) {
    00212         if (!allow_water) return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
    00213         if (!IsWaterTile(t)) {
    00214           /* Normal water tiles don't have to be cleared. For all other tile types clear
    00215            * the tile but leave the water. */
    00216           cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_NO_WATER, CMD_LANDSCAPE_CLEAR));
    00217         }
    00218       } else {
    00219         if (!allow_ground) return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
    00220         /* For non-water tiles, we'll have to clear it before building. */
    00221         cost.AddCost(DoCommand(t, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
    00222       }
    00223     }
    00224
    00225     /* So, now the surface is checked... check the slope of said surface. */
    00226     int allowed_z;
    00227     if (GetTileSlope(tile, (uint*)&allowed_z) != SLOPE_FLAT) allowed_z += TILE_HEIGHT;
    00228
    00229     TILE_AREA_LOOP(t, ta) {
    00230       uint16 callback = CALLBACK_FAILED;
    00231       if (HasBit(spec->callback_mask, CBM_OBJ_SLOPE_CHECK)) {
    00232         TileIndex diff = t - tile;
    00233         callback = GetObjectCallback(CBID_OBJECT_LAND_SLOPE_CHECK, GetTileSlope(t, NULL), TileY(diff) << 4 | TileX(diff), spec, NULL, t, view);
    00234       }
    00235
    00236       if (callback == CALLBACK_FAILED) {
    00237         cost.AddCost(CheckBuildableTile(t, 0, allowed_z, false));
    00238       } else if (callback != 0) {
    00239         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00240       }
    00241     }
    00242   }
    00243   if (cost.Failed()) return cost;
    00244
    00245   /* Finally do a check for bridges. */
    00246   TILE_AREA_LOOP(t, ta) {
    00247     if (MayHaveBridgeAbove(t) && IsBridgeAbove(t) && (
    00248         !(spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) ||
    00249         (GetTileMaxZ(t) + spec->height * TILE_HEIGHT >= GetBridgeHeight(GetSouthernBridgeEnd(t))))) {
    00250       return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    00251     }
    00252   }
    00253
    00254   int hq_score = 0;
    00255   switch (type) {
    00256     case OBJECT_TRANSMITTER:
    00257     case OBJECT_LIGHTHOUSE:
    00258       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00259       break;
    00260
    00261     case OBJECT_OWNED_LAND:
    00262       if (IsTileType(tile, MP_OBJECT) &&
    00263           IsTileOwner(tile, _current_company) &&
    00264           IsOwnedLand(tile)) {
    00265         return_cmd_error(STR_ERROR_YOU_ALREADY_OWN_IT);
    00266       }
    00267       break;
    00268
    00269     case OBJECT_HQ: {
    00270       Company *c = Company::Get(_current_company);
    00271       if (c->location_of_HQ != INVALID_TILE) {
    00272         /* We need to persuade a bit harder to remove the old HQ. */
    00273         _current_company = OWNER_WATER;
    00274         cost.AddCost(ClearTile_Object(c->location_of_HQ, flags));
    00275         _current_company = c->index;
    00276       }
    00277
    00278       if (flags & DC_EXEC) {
    00279         hq_score = UpdateCompanyRatingAndValue(c, false);
    00280         c->location_of_HQ = tile;
    00281         SetWindowDirty(WC_COMPANY, c->index);
    00282       }
    00283       break;
    00284     }
    00285
    00286     case OBJECT_STATUE:
    00287       /* This may never be constructed using this method. */
    00288       return CMD_ERROR;
    00289
    00290     default: // i.e. NewGRF provided.
    00291       break;
    00292   }
    00293
    00294   if (flags & DC_EXEC) {
    00295     BuildObject(type, tile, _current_company, NULL, view);
    00296
    00297     /* Make sure the HQ starts at the right size. */
    00298     if (type == OBJECT_HQ) UpdateCompanyHQ(tile, hq_score);
    00299   }
    00300
    00301   cost.AddCost(ObjectSpec::Get(type)->GetBuildCost() * size_x * size_y);
    00302   return cost;
    00303 }
    00304
    00305
    00306 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh);
    00307
    00308 static void DrawTile_Object(TileInfo *ti)
    00309 {
    00310   ObjectType type = GetObjectType(ti->tile);
    00311   const ObjectSpec *spec = ObjectSpec::Get(type);
    00312
    00313   /* Fall back for when the object doesn't exist anymore. */
    00314   if (!spec->enabled) type = OBJECT_TRANSMITTER;
    00315
    00316   if ((spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) == 0) DrawFoundation(ti, GetFoundation_Object(ti->tile, ti->tileh));
    00317
    00318   if (type < NEW_OBJECT_OFFSET) {
    00319     const DrawTileSprites *dts = NULL;
    00320     Owner to = GetTileOwner(ti->tile);
    00321     PaletteID palette = to == OWNER_NONE ? PAL_NONE : COMPANY_SPRITE_COLOUR(to);
    00322
    00323     if (type == OBJECT_HQ) {
    00324       TileIndex diff = ti->tile - Object::GetByTile(ti->tile)->location.tile;
    00325       dts = &_object_hq[GetCompanyHQSize(ti->tile) << 2 | TileY(diff) << 1 | TileX(diff)];
    00326     } else {
    00327       dts = &_objects[type];
    00328     }
    00329
    00330     if (spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) {
    00331       /* If an object has no foundation, but tries to draw a (flat) ground
    00332        * type... we have to be nice and convert that for them. */
    00333       switch (dts->ground.sprite) {
    00334         case SPR_FLAT_BARE_LAND:          DrawClearLandTile(ti, 0); break;
    00335         case SPR_FLAT_1_THIRD_GRASS_TILE: DrawClearLandTile(ti, 1); break;
    00336         case SPR_FLAT_2_THIRD_GRASS_TILE: DrawClearLandTile(ti, 2); break;
    00337         case SPR_FLAT_GRASS_TILE:         DrawClearLandTile(ti, 3); break;
    00338         default: DrawGroundSprite(dts->ground.sprite, palette);     break;
    00339       }
    00340     } else {
    00341       DrawGroundSprite(dts->ground.sprite, palette);
    00342     }
    00343
    00344     if (!IsInvisibilitySet(TO_STRUCTURES)) {
    00345       const DrawTileSeqStruct *dtss;
    00346       foreach_draw_tile_seq(dtss, dts->seq) {
    00347         AddSortableSpriteToDraw(
    00348           dtss->image.sprite, palette,
    00349           ti->x + dtss->delta_x, ti->y + dtss->delta_y,
    00350           dtss->size_x, dtss->size_y,
    00351           dtss->size_z, ti->z + dtss->delta_z,
    00352           IsTransparencySet(TO_STRUCTURES)
    00353         );
    00354       }
    00355     }
    00356   } else {
    00357     DrawNewObjectTile(ti, spec);
    00358   }
    00359
    00360   if (spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) DrawBridgeMiddle(ti);
    00361 }
    00362
    00363 static uint GetSlopeZ_Object(TileIndex tile, uint x, uint y)
    00364 {
    00365   if (IsOwnedLand(tile)) {
    00366     uint z;
    00367     Slope tileh = GetTileSlope(tile, &z);
    00368
    00369     return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
    00370   } else {
    00371     return GetTileMaxZ(tile);
    00372   }
    00373 }
    00374
    00375 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh)
    00376 {
    00377   return IsOwnedLand(tile) ? FOUNDATION_NONE : FlatteningFoundation(tileh);
    00378 }
    00379
    00384 static void ReallyClearObjectTile(Object *o)
    00385 {
    00386   Object::DecTypeCount(GetObjectType(o->location.tile));
    00387   TILE_AREA_LOOP(tile_cur, o->location) {
    00388     DeleteNewGRFInspectWindow(GSF_OBJECTS, tile_cur);
    00389
    00390     MakeWaterKeepingClass(tile_cur, GetTileOwner(tile_cur));
    00391   }
    00392   delete o;
    00393 }
    00394
    00395 SmallVector<ClearedObjectArea, 4> _cleared_object_areas;
    00396
    00402 ClearedObjectArea *FindClearedObject(TileIndex tile)
    00403 {
    00404   TileArea ta = TileArea(tile, 1, 1);
    00405
    00406   const ClearedObjectArea *end = _cleared_object_areas.End();
    00407   for (ClearedObjectArea *coa = _cleared_object_areas.Begin(); coa != end; coa++) {
    00408     if (coa->area.Intersects(ta)) return coa;
    00409   }
    00410
    00411   return NULL;
    00412 }
    00413
    00414 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags)
    00415 {
    00416   ObjectType type = GetObjectType(tile);
    00417   const ObjectSpec *spec = ObjectSpec::Get(type);
    00418
    00419   /* Get to the northern most tile. */
    00420   Object *o = Object::GetByTile(tile);
    00421   TileArea ta = o->location;
    00422
    00423   ClearedObjectArea *cleared_area = _cleared_object_areas.Append();
    00424   cleared_area->first_tile = tile;
    00425   cleared_area->area = ta;
    00426
    00427   CommandCost cost(EXPENSES_CONSTRUCTION, spec->GetClearCost() * ta.w * ta.h / 5);
    00428   if (spec->flags & OBJECT_FLAG_CLEAR_INCOME) cost.MultiplyCost(-1); // They get an income!
    00429
    00430   /* Water can remove everything! */
    00431   if (_current_company != OWNER_WATER) {
    00432     if ((flags & DC_NO_WATER) && IsTileOnWater(tile)) {
    00433       /* There is water under the object, treat it as water tile. */
    00434       return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
    00435     } else if (!(spec->flags & OBJECT_FLAG_AUTOREMOVE) && (flags & DC_AUTO)) {
    00436       /* No automatic removal by overbuilding stuff. */
    00437       return_cmd_error(type == OBJECT_HQ ? STR_ERROR_COMPANY_HEADQUARTERS_IN : STR_ERROR_OBJECT_IN_THE_WAY);
    00438     } else if (_game_mode == GM_EDITOR) {
    00439       /* No further limitations for the editor. */
    00440     } else if (GetTileOwner(tile) == OWNER_NONE) {
    00441       /* Owned by nobody, so we can only remove it with brute force! */
    00442       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
    00443     } else if (CheckTileOwnership(tile).Failed()) {
    00444       /* We don't own it!. */
    00445       return_cmd_error(STR_ERROR_OWNED_BY);
    00446     } else if ((spec->flags & OBJECT_FLAG_CANNOT_REMOVE) != 0 && (spec->flags & OBJECT_FLAG_AUTOREMOVE) == 0) {
    00447       /* In the game editor or with cheats we can remove, otherwise we can't. */
    00448       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
    00449
    00450       /* Removing with the cheat costs more in TTDPatch / the specs. */
    00451       cost.MultiplyCost(25);
    00452     }
    00453   } else if ((spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0) {
    00454     /* Water can't remove objects that are buildable on water. */
    00455     return CMD_ERROR;
    00456   }
    00457
    00458   switch (type) {
    00459     case OBJECT_HQ: {
    00460       Company *c = Company::Get(GetTileOwner(tile));
    00461       if (flags & DC_EXEC) {
    00462         c->location_of_HQ = INVALID_TILE; // reset HQ position
    00463         SetWindowDirty(WC_COMPANY, c->index);
    00464         CargoPacket::InvalidateAllFrom(ST_HEADQUARTERS, c->index);
    00465       }
    00466
    00467       /* cost of relocating company is 1% of company value */
    00468       cost = CommandCost(EXPENSES_PROPERTY, CalculateCompanyValue(c) / 100);
    00469       break;
    00470     }
    00471
    00472     case OBJECT_STATUE:
    00473       if (flags & DC_EXEC) {
    00474         Town *town = o->town;
    00475         ClrBit(town->statues, GetTileOwner(tile));
    00476         SetWindowDirty(WC_TOWN_AUTHORITY, town->index);
    00477       }
    00478       break;
    00479
    00480     default:
    00481       break;
    00482   }
    00483
    00484   if (flags & DC_EXEC) ReallyClearObjectTile(o);
    00485
    00486   return cost;
    00487 }
    00488
    00489 static void AddAcceptedCargo_Object(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted)
    00490 {
    00491   if (!IsCompanyHQ(tile)) return;
    00492
    00493   /* HQ accepts passenger and mail; but we have to divide the values
    00494    * between 4 tiles it occupies! */
    00495
    00496   /* HQ level (depends on company performance) in the range 1..5. */
    00497   uint level = GetCompanyHQSize(tile) + 1;
    00498
    00499   /* Top town building generates 10, so to make HQ interesting, the top
    00500    * type makes 20. */
    00501   acceptance[CT_PASSENGERS] += max(1U, level);
    00502   SetBit(*always_accepted, CT_PASSENGERS);
    00503
    00504   /* Top town building generates 4, HQ can make up to 8. The
    00505    * proportion passengers:mail is different because such a huge
    00506    * commercial building generates unusually high amount of mail
    00507    * correspondence per physical visitor. */
    00508   acceptance[CT_MAIL] += max(1U, level / 2);
    00509   SetBit(*always_accepted, CT_MAIL);
    00510 }
    00511
    00512
    00513 static void GetTileDesc_Object(TileIndex tile, TileDesc *td)
    00514 {
    00515   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
    00516   td->str = spec->name;
    00517   td->owner[0] = GetTileOwner(tile);
    00518   td->build_date = Object::GetByTile(tile)->build_date;
    00519
    00520   if (spec->grf_prop.grffile != NULL) {
    00521     td->grf = GetGRFConfig(spec->grf_prop.grffile->grfid)->GetName();
    00522   }
    00523 }
    00524
    00525 static void TileLoop_Object(TileIndex tile)
    00526 {
    00527   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
    00528   if (spec->flags & OBJECT_FLAG_ANIMATION) {
    00529     const Object *o = Object::GetByTile(tile);
    00530     TriggerObjectTileAnimation(o, tile, OAT_TILELOOP, spec);
    00531     if (o->location.tile == tile) TriggerObjectAnimation(o, OAT_256_TICKS, spec);
    00532   }
    00533
    00534   if (IsTileOnWater(tile)) TileLoop_Water(tile);
    00535
    00536   if (!IsCompanyHQ(tile)) return;
    00537
    00538   /* HQ accepts passenger and mail; but we have to divide the values
    00539    * between 4 tiles it occupies! */
    00540
    00541   /* HQ level (depends on company performance) in the range 1..5. */
    00542   uint level = GetCompanyHQSize(tile) + 1;
    00543   assert(level < 6);
    00544
    00545   StationFinder stations(TileArea(tile, 2, 2));
    00546
    00547   uint r = Random();
    00548   /* Top town buildings generate 250, so the top HQ type makes 256. */
    00549   if (GB(r, 0, 8) < (256 / 4 / (6 - level))) {
    00550     uint amt = GB(r, 0, 8) / 8 / 4 + 1;
    00551     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
    00552     MoveGoodsToStation(CT_PASSENGERS, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
    00553   }
    00554
    00555   /* Top town building generates 90, HQ can make up to 196. The
    00556    * proportion passengers:mail is about the same as in the acceptance
    00557    * equations. */
    00558   if (GB(r, 8, 8) < (196 / 4 / (6 - level))) {
    00559     uint amt = GB(r, 8, 8) / 8 / 4 + 1;
    00560     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
    00561     MoveGoodsToStation(CT_MAIL, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
    00562   }
    00563 }
    00564
    00565
    00566 static TrackStatus GetTileTrackStatus_Object(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
    00567 {
    00568   return 0;
    00569 }
    00570
    00571 static bool ClickTile_Object(TileIndex tile)
    00572 {
    00573   if (!IsCompanyHQ(tile)) return false;
    00574
    00575   ShowCompany(GetTileOwner(tile));
    00576   return true;
    00577 }
    00578
    00579 static void AnimateTile_Object(TileIndex tile)
    00580 {
    00581   AnimateNewObjectTile(tile);
    00582 }
    00583
    00590 static bool HasTransmitter(TileIndex tile, void *user)
    00591 {
    00592   return IsTransmitterTile(tile);
    00593 }
    00594
    00595 void GenerateObjects()
    00596 {
    00597   if (_settings_game.game_creation.landscape == LT_TOYLAND) return;
    00598
    00599   /* add radio tower */
    00600   int radiotower_to_build = ScaleByMapSize(15); // maximum number of radio towers on the map
    00601   int lighthouses_to_build = _settings_game.game_creation.landscape == LT_TROPIC ? 0 : ScaleByMapSize1D((Random() & 3) + 7);
    00602
    00603   /* Scale the amount of lighthouses with the amount of land at the borders. */
    00604   if (_settings_game.construction.freeform_edges && lighthouses_to_build != 0) {
    00605     uint num_water_tiles = 0;
    00606     for (uint x = 0; x < MapMaxX(); x++) {
    00607       if (IsTileType(TileXY(x, 1), MP_WATER)) num_water_tiles++;
    00608       if (IsTileType(TileXY(x, MapMaxY() - 1), MP_WATER)) num_water_tiles++;
    00609     }
    00610     for (uint y = 1; y < MapMaxY() - 1; y++) {
    00611       if (IsTileType(TileXY(1, y), MP_WATER)) num_water_tiles++;
    00612       if (IsTileType(TileXY(MapMaxX() - 1, y), MP_WATER)) num_water_tiles++;
    00613     }
    00614     /* The -6 is because the top borders are MP_VOID (-2) and all corners
    00615      * are counted twice (-4). */
    00616     lighthouses_to_build = lighthouses_to_build * num_water_tiles / (2 * MapMaxY() + 2 * MapMaxX() - 6);
    00617   }
    00618
    00619   SetGeneratingWorldProgress(GWP_OBJECT, radiotower_to_build + lighthouses_to_build);
    00620
    00621   for (uint i = ScaleByMapSize(1000); i != 0 && Object::CanAllocateItem(); i--) {
    00622     TileIndex tile = RandomTile();
    00623
    00624     uint h;
    00625     if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h >= TILE_HEIGHT * 4 && !IsBridgeAbove(tile)) {
    00626       TileIndex t = tile;
    00627       if (CircularTileSearch(&t, 9, HasTransmitter, NULL)) continue;
    00628
    00629       BuildObject(OBJECT_TRANSMITTER, tile);
    00630       IncreaseGeneratingWorldProgress(GWP_OBJECT);
    00631       if (--radiotower_to_build == 0) break;
    00632     }
    00633   }
    00634
    00635   /* add lighthouses */
    00636   uint maxx = MapMaxX();
    00637   uint maxy = MapMaxY();
    00638   for (int loop_count = 0; loop_count < 1000 && lighthouses_to_build != 0 && Object::CanAllocateItem(); loop_count++) {
    00639     uint r = Random();
    00640
    00641     /* Scatter the lighthouses more evenly around the perimeter */
    00642     int perimeter = (GB(r, 16, 16) % (2 * (maxx + maxy))) - maxy;
    00643     DiagDirection dir;
    00644     for (dir = DIAGDIR_NE; perimeter > 0; dir++) {
    00645       perimeter -= (DiagDirToAxis(dir) == AXIS_X) ? maxx : maxy;
    00646     }
    00647
    00648     TileIndex tile;
    00649     switch (dir) {
    00650       default:
    00651       case DIAGDIR_NE: tile = TileXY(maxx - 1, r % maxy); break;
    00652       case DIAGDIR_SE: tile = TileXY(r % maxx, 1); break;
    00653       case DIAGDIR_SW: tile = TileXY(1,        r % maxy); break;
    00654       case DIAGDIR_NW: tile = TileXY(r % maxx, maxy - 1); break;
    00655     }
    00656
    00657     /* Only build lighthouses at tiles where the border is sea. */
    00658     if (!IsTileType(tile, MP_WATER)) continue;
    00659
    00660     for (int j = 0; j < 19; j++) {
    00661       uint h;
    00662       if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h <= TILE_HEIGHT * 2 && !IsBridgeAbove(tile)) {
    00663         BuildObject(OBJECT_LIGHTHOUSE, tile);
    00664         IncreaseGeneratingWorldProgress(GWP_OBJECT);
    00665         lighthouses_to_build--;
    00666         assert(tile < MapSize());
    00667         break;
    00668       }
    00669       tile = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDiagDir(dir));
    00670       if (tile == INVALID_TILE) break;
    00671     }
    00672   }
    00673 }
    00674
    00675 static void ChangeTileOwner_Object(TileIndex tile, Owner old_owner, Owner new_owner)
    00676 {
    00677   if (!IsTileOwner(tile, old_owner)) return;
    00678
    00679   if (IsOwnedLand(tile) && new_owner != INVALID_OWNER) {
    00680     SetTileOwner(tile, new_owner);
    00681   } else if (IsStatueTile(tile)) {
    00682     Town *t = Object::GetByTile(tile)->town;
    00683     ClrBit(t->statues, old_owner);
    00684     if (new_owner != INVALID_OWNER && !HasBit(t->statues, new_owner)) {
    00685       /* Transfer ownership to the new company */
    00686       SetBit(t->statues, new_owner);
    00687       SetTileOwner(tile, new_owner);
    00688     } else {
    00689       ReallyClearObjectTile(Object::GetByTile(tile));
    00690     }
    00691
    00692     SetWindowDirty(WC_TOWN_AUTHORITY, t->index);
    00693   } else {
    00694     ReallyClearObjectTile(Object::GetByTile(tile));
    00695   }
    00696 }
    00697
    00698 static CommandCost TerraformTile_Object(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
    00699 {
    00700   ObjectType type = GetObjectType(tile);
    00701
    00702   if (type == OBJECT_OWNED_LAND) {
    00703     /* Owned land remains unsold */
    00704     CommandCost ret = CheckTileOwnership(tile);
    00705     if (ret.Succeeded()) return CommandCost();
    00706   } else if (AutoslopeEnabled() && type != OBJECT_TRANSMITTER && type != OBJECT_LIGHTHOUSE) {
    00707     /* Behaviour:
    00708      *  - Both new and old slope must not be steep.
    00709      *  - TileMaxZ must not be changed.
    00710      *  - Allow autoslope by default.
    00711      *  - Disallow autoslope if callback succeeds and returns non-zero.
    00712      */
    00713     Slope tileh_old = GetTileSlope(tile, NULL);
    00714     /* TileMaxZ must not be changed. Slopes must not be steep. */
    00715     if (!IsSteepSlope(tileh_old) && !IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
    00716       const ObjectSpec *spec = ObjectSpec::Get(type);
    00717
    00718       /* Call callback 'disable autosloping for objects'. */
    00719       if (HasBit(spec->callback_mask, CBM_OBJ_AUTOSLOPE)) {
    00720         /* If the callback fails, allow autoslope. */
    00721         uint16 res = GetObjectCallback(CBID_OBJECT_AUTOSLOPE, 0, 0, spec, Object::GetByTile(tile), tile);
    00722         if ((res == 0) || (res == CALLBACK_FAILED)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00723       } else if (spec->enabled) {
    00724         /* allow autoslope */
    00725         return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00726       }
    00727     }
    00728   }
    00729
    00730   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00731 }
    00732
    00733 extern const TileTypeProcs _tile_type_object_procs = {
    00734   DrawTile_Object,             // draw_tile_proc
    00735   GetSlopeZ_Object,            // get_slope_z_proc
    00736   ClearTile_Object,            // clear_tile_proc
    00737   AddAcceptedCargo_Object,     // add_accepted_cargo_proc
    00738   GetTileDesc_Object,          // get_tile_desc_proc
    00739   GetTileTrackStatus_Object,   // get_tile_track_status_proc
    00740   ClickTile_Object,            // click_tile_proc
    00741   AnimateTile_Object,          // animate_tile_proc
    00742   TileLoop_Object,             // tile_loop_clear
    00743   ChangeTileOwner_Object,      // change_tile_owner_clear
    00744   NULL,                        // add_produced_cargo_proc
    00745   NULL,                        // vehicle_enter_tile_proc
    00746   GetFoundation_Object,        // get_foundation_proc
    00747   TerraformTile_Object,        // terraform_tile_proc
    00748 };