object_cmd.cpp

Go to the documentation of this file.
00001 /* $Id: object_cmd.cpp 22654 2011-07-10 20:35:31Z rubidium $ */
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_pool.CleanPool();
00059   Object::ResetTypeCounts();
00060 }
00061 
00072 void BuildObject(ObjectType type, TileIndex tile, CompanyID owner, Town *town, uint8 view)
00073 {
00074   const ObjectSpec *spec = ObjectSpec::Get(type);
00075 
00076   TileArea ta(tile, GB(spec->size, HasBit(view, 0) ? 4 : 0, 4), GB(spec->size, HasBit(view, 0) ? 0 : 4, 4));
00077   Object *o = new Object();
00078   o->location      = ta;
00079   o->town          = town == NULL ? CalcClosestTownFromTile(tile) : town;
00080   o->build_date    = _date;
00081   o->view          = view;
00082 
00083   /* If nothing owns the object, the colour will be random. Otherwise
00084    * get the colour from the company's livery settings. */
00085   if (owner == OWNER_NONE) {
00086     o->colour = Random();
00087   } else {
00088     const Livery *l = Company::Get(owner)->livery;
00089     o->colour = l->colour1 + l->colour2 * 16;
00090   }
00091 
00092   /* If the object wants only one colour, then give it that colour. */
00093   if ((spec->flags & OBJECT_FLAG_2CC_COLOUR) == 0) o->colour &= 0xF;
00094 
00095   if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) {
00096     uint16 res = GetObjectCallback(CBID_OBJECT_COLOUR, o->colour, 0, spec, o, tile);
00097     if (res != CALLBACK_FAILED) o->colour = GB(res, 0, 8);
00098   }
00099 
00100   assert(o->town != NULL);
00101 
00102   TILE_AREA_LOOP(t, ta) {
00103     WaterClass wc = (IsWaterTile(t) ? GetWaterClass(t) : WATER_CLASS_INVALID);
00104     MakeObject(t, type, owner, o->index, wc, Random());
00105     MarkTileDirtyByTile(t);
00106   }
00107 
00108   Object::IncTypeCount(type);
00109   if (spec->flags & OBJECT_FLAG_ANIMATION) TriggerObjectAnimation(o, OAT_BUILT, spec);
00110 }
00111 
00116 static void IncreaseAnimationStage(TileIndex tile)
00117 {
00118   TileArea ta = Object::GetByTile(tile)->location;
00119   TILE_AREA_LOOP(t, ta) {
00120     SetAnimationFrame(t, GetAnimationFrame(t) + 1);
00121     MarkTileDirtyByTile(t);
00122   }
00123 }
00124 
00126 #define GetCompanyHQSize GetAnimationFrame
00127 
00128 #define IncreaseCompanyHQSize IncreaseAnimationStage
00129 
00135 void UpdateCompanyHQ(TileIndex tile, uint score)
00136 {
00137   if (tile == INVALID_TILE) return;
00138 
00139   byte val;
00140   (val = 0, score < 170) ||
00141   (val++, score < 350) ||
00142   (val++, score < 520) ||
00143   (val++, score < 720) ||
00144   (val++, true);
00145 
00146   while (GetCompanyHQSize(tile) < val) {
00147     IncreaseCompanyHQSize(tile);
00148   }
00149 }
00150 
00155 void UpdateObjectColours(const Company *c)
00156 {
00157   Object *obj;
00158   FOR_ALL_OBJECTS(obj) {
00159     Owner owner = GetTileOwner(obj->location.tile);
00160     /* Not the current owner, so colour doesn't change. */
00161     if (owner != c->index) continue;
00162 
00163     const ObjectSpec *spec = ObjectSpec::GetByTile(obj->location.tile);
00164     /* Using the object colour callback, so not using company colour. */
00165     if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) continue;
00166 
00167     const Livery *l = c->livery;
00168     obj->colour = ((spec->flags & OBJECT_FLAG_2CC_COLOUR) ? (l->colour2 * 16) : 0) + l->colour1;
00169   }
00170 }
00171 
00172 extern CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool check_bridge);
00173 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags);
00174 
00184 CommandCost CmdBuildObject(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00185 {
00186   CommandCost cost(EXPENSES_PROPERTY);
00187 
00188   ObjectType type = (ObjectType)GB(p1, 0, 8);
00189   uint8 view = GB(p2, 0, 2);
00190   const ObjectSpec *spec = ObjectSpec::Get(type);
00191   if (!spec->IsAvailable()) return CMD_ERROR;
00192 
00193   if (spec->flags & OBJECT_FLAG_ONLY_IN_SCENEDIT && (_game_mode != GM_EDITOR || _current_company != OWNER_NONE)) return CMD_ERROR;
00194   if (spec->flags & OBJECT_FLAG_ONLY_IN_GAME && (_game_mode != GM_NORMAL || _current_company > MAX_COMPANIES)) return CMD_ERROR;
00195   if (view >= spec->views) return CMD_ERROR;
00196 
00197   if (!Object::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_OBJECTS);
00198   if (Town::GetNumItems() == 0) return_cmd_error(STR_ERROR_MUST_FOUND_TOWN_FIRST);
00199 
00200   int size_x = GB(spec->size, HasBit(view, 0) ? 4 : 0, 4);
00201   int size_y = GB(spec->size, HasBit(view, 0) ? 0 : 4, 4);
00202   TileArea ta(tile, size_x, size_y);
00203 
00204   if (type == OBJECT_OWNED_LAND) {
00205     /* Owned land is special as it can be placed on any slope. */
00206     cost.AddCost(DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
00207   } else {
00208     /* Check the surface to build on. */
00209     bool allow_water = (spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0;
00210     bool allow_ground = (spec->flags & OBJECT_FLAG_NOT_ON_LAND) == 0;
00211     TILE_AREA_LOOP(t, ta) {
00212       if (HasTileWaterGround(t)) {
00213         if (!allow_water) return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00214         if (!IsWaterTile(t)) {
00215           /* Normal water tiles don't have to be cleared. For all other tile types clear
00216            * the tile but leave the water. */
00217           cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_NO_WATER, CMD_LANDSCAPE_CLEAR));
00218         } else {
00219           /* Can't build on water owned by another company. */
00220           Owner o = GetTileOwner(t);
00221           if (o != OWNER_NONE && o != OWNER_WATER) cost.AddCost(CheckOwnership(o, t));
00222         }
00223       } else {
00224         if (!allow_ground) return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
00225         /* For non-water tiles, we'll have to clear it before building. */
00226         cost.AddCost(DoCommand(t, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
00227       }
00228     }
00229 
00230     /* So, now the surface is checked... check the slope of said surface. */
00231     int allowed_z;
00232     if (GetTileSlope(tile, (uint*)&allowed_z) != SLOPE_FLAT) allowed_z += TILE_HEIGHT;
00233 
00234     TILE_AREA_LOOP(t, ta) {
00235       uint16 callback = CALLBACK_FAILED;
00236       if (HasBit(spec->callback_mask, CBM_OBJ_SLOPE_CHECK)) {
00237         TileIndex diff = t - tile;
00238         callback = GetObjectCallback(CBID_OBJECT_LAND_SLOPE_CHECK, GetTileSlope(t, NULL), TileY(diff) << 4 | TileX(diff), spec, NULL, t, view);
00239       }
00240 
00241       if (callback == CALLBACK_FAILED) {
00242         cost.AddCost(CheckBuildableTile(t, 0, allowed_z, false));
00243       } else if (callback != 0) {
00244         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
00245       }
00246     }
00247   }
00248   if (cost.Failed()) return cost;
00249 
00250   /* Finally do a check for bridges. */
00251   TILE_AREA_LOOP(t, ta) {
00252     if (MayHaveBridgeAbove(t) && IsBridgeAbove(t) && (
00253         !(spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) ||
00254         (GetTileMaxZ(t) + spec->height * TILE_HEIGHT >= GetBridgeHeight(GetSouthernBridgeEnd(t))))) {
00255       return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00256     }
00257   }
00258 
00259   int hq_score = 0;
00260   switch (type) {
00261     case OBJECT_TRANSMITTER:
00262     case OBJECT_LIGHTHOUSE:
00263       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00264       break;
00265 
00266     case OBJECT_OWNED_LAND:
00267       if (IsTileType(tile, MP_OBJECT) &&
00268           IsTileOwner(tile, _current_company) &&
00269           IsOwnedLand(tile)) {
00270         return_cmd_error(STR_ERROR_YOU_ALREADY_OWN_IT);
00271       }
00272       break;
00273 
00274     case OBJECT_HQ: {
00275       Company *c = Company::Get(_current_company);
00276       if (c->location_of_HQ != INVALID_TILE) {
00277         /* We need to persuade a bit harder to remove the old HQ. */
00278         _current_company = OWNER_WATER;
00279         cost.AddCost(ClearTile_Object(c->location_of_HQ, flags));
00280         _current_company = c->index;
00281       }
00282 
00283       if (flags & DC_EXEC) {
00284         hq_score = UpdateCompanyRatingAndValue(c, false);
00285         c->location_of_HQ = tile;
00286         SetWindowDirty(WC_COMPANY, c->index);
00287       }
00288       break;
00289     }
00290 
00291     case OBJECT_STATUE:
00292       /* This may never be constructed using this method. */
00293       return CMD_ERROR;
00294 
00295     default: // i.e. NewGRF provided.
00296       break;
00297   }
00298 
00299   if (flags & DC_EXEC) {
00300     BuildObject(type, tile, _current_company, NULL, view);
00301 
00302     /* Make sure the HQ starts at the right size. */
00303     if (type == OBJECT_HQ) UpdateCompanyHQ(tile, hq_score);
00304   }
00305 
00306   cost.AddCost(ObjectSpec::Get(type)->GetBuildCost() * size_x * size_y);
00307   return cost;
00308 }
00309 
00310 
00311 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh);
00312 
00313 static void DrawTile_Object(TileInfo *ti)
00314 {
00315   ObjectType type = GetObjectType(ti->tile);
00316   const ObjectSpec *spec = ObjectSpec::Get(type);
00317 
00318   /* Fall back for when the object doesn't exist anymore. */
00319   if (!spec->enabled) type = OBJECT_TRANSMITTER;
00320 
00321   if ((spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) == 0) DrawFoundation(ti, GetFoundation_Object(ti->tile, ti->tileh));
00322 
00323   if (type < NEW_OBJECT_OFFSET) {
00324     const DrawTileSprites *dts = NULL;
00325     Owner to = GetTileOwner(ti->tile);
00326     PaletteID palette = to == OWNER_NONE ? PAL_NONE : COMPANY_SPRITE_COLOUR(to);
00327 
00328     if (type == OBJECT_HQ) {
00329       TileIndex diff = ti->tile - Object::GetByTile(ti->tile)->location.tile;
00330       dts = &_object_hq[GetCompanyHQSize(ti->tile) << 2 | TileY(diff) << 1 | TileX(diff)];
00331     } else {
00332       dts = &_objects[type];
00333     }
00334 
00335     if (spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) {
00336       /* If an object has no foundation, but tries to draw a (flat) ground
00337        * type... we have to be nice and convert that for them. */
00338       switch (dts->ground.sprite) {
00339         case SPR_FLAT_BARE_LAND:          DrawClearLandTile(ti, 0); break;
00340         case SPR_FLAT_1_THIRD_GRASS_TILE: DrawClearLandTile(ti, 1); break;
00341         case SPR_FLAT_2_THIRD_GRASS_TILE: DrawClearLandTile(ti, 2); break;
00342         case SPR_FLAT_GRASS_TILE:         DrawClearLandTile(ti, 3); break;
00343         default: DrawGroundSprite(dts->ground.sprite, palette);     break;
00344       }
00345     } else {
00346       DrawGroundSprite(dts->ground.sprite, palette);
00347     }
00348 
00349     if (!IsInvisibilitySet(TO_STRUCTURES)) {
00350       const DrawTileSeqStruct *dtss;
00351       foreach_draw_tile_seq(dtss, dts->seq) {
00352         AddSortableSpriteToDraw(
00353           dtss->image.sprite, palette,
00354           ti->x + dtss->delta_x, ti->y + dtss->delta_y,
00355           dtss->size_x, dtss->size_y,
00356           dtss->size_z, ti->z + dtss->delta_z,
00357           IsTransparencySet(TO_STRUCTURES)
00358         );
00359       }
00360     }
00361   } else {
00362     DrawNewObjectTile(ti, spec);
00363   }
00364 
00365   if (spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) DrawBridgeMiddle(ti);
00366 }
00367 
00368 static uint GetSlopeZ_Object(TileIndex tile, uint x, uint y)
00369 {
00370   if (IsOwnedLand(tile)) {
00371     uint z;
00372     Slope tileh = GetTileSlope(tile, &z);
00373 
00374     return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
00375   } else {
00376     return GetTileMaxZ(tile);
00377   }
00378 }
00379 
00380 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh)
00381 {
00382   return IsOwnedLand(tile) ? FOUNDATION_NONE : FlatteningFoundation(tileh);
00383 }
00384 
00389 static void ReallyClearObjectTile(Object *o)
00390 {
00391   Object::DecTypeCount(GetObjectType(o->location.tile));
00392   TILE_AREA_LOOP(tile_cur, o->location) {
00393     DeleteNewGRFInspectWindow(GSF_OBJECTS, tile_cur);
00394 
00395     MakeWaterKeepingClass(tile_cur, GetTileOwner(tile_cur));
00396   }
00397   delete o;
00398 }
00399 
00400 SmallVector<ClearedObjectArea, 4> _cleared_object_areas;
00401 
00407 ClearedObjectArea *FindClearedObject(TileIndex tile)
00408 {
00409   TileArea ta = TileArea(tile, 1, 1);
00410 
00411   const ClearedObjectArea *end = _cleared_object_areas.End();
00412   for (ClearedObjectArea *coa = _cleared_object_areas.Begin(); coa != end; coa++) {
00413     if (coa->area.Intersects(ta)) return coa;
00414   }
00415 
00416   return NULL;
00417 }
00418 
00419 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags)
00420 {
00421   ObjectType type = GetObjectType(tile);
00422   const ObjectSpec *spec = ObjectSpec::Get(type);
00423 
00424   /* Get to the northern most tile. */
00425   Object *o = Object::GetByTile(tile);
00426   TileArea ta = o->location;
00427 
00428   ClearedObjectArea *cleared_area = _cleared_object_areas.Append();
00429   cleared_area->first_tile = tile;
00430   cleared_area->area = ta;
00431 
00432   CommandCost cost(EXPENSES_CONSTRUCTION, spec->GetClearCost() * ta.w * ta.h / 5);
00433   if (spec->flags & OBJECT_FLAG_CLEAR_INCOME) cost.MultiplyCost(-1); // They get an income!
00434 
00435   /* Water can remove everything! */
00436   if (_current_company != OWNER_WATER) {
00437     if ((flags & DC_NO_WATER) && IsTileOnWater(tile)) {
00438       /* There is water under the object, treat it as water tile. */
00439       return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00440     } else if (!(spec->flags & OBJECT_FLAG_AUTOREMOVE) && (flags & DC_AUTO)) {
00441       /* No automatic removal by overbuilding stuff. */
00442       return_cmd_error(type == OBJECT_HQ ? STR_ERROR_COMPANY_HEADQUARTERS_IN : STR_ERROR_OBJECT_IN_THE_WAY);
00443     } else if (_game_mode == GM_EDITOR) {
00444       /* No further limitations for the editor. */
00445     } else if (GetTileOwner(tile) == OWNER_NONE) {
00446       /* Owned by nobody, so we can only remove it with brute force! */
00447       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00448     } else if (CheckTileOwnership(tile).Failed()) {
00449       /* We don't own it!. */
00450       return_cmd_error(STR_ERROR_OWNED_BY);
00451     } else if ((spec->flags & OBJECT_FLAG_CANNOT_REMOVE) != 0 && (spec->flags & OBJECT_FLAG_AUTOREMOVE) == 0) {
00452       /* In the game editor or with cheats we can remove, otherwise we can't. */
00453       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00454 
00455       /* Removing with the cheat costs more in TTDPatch / the specs. */
00456       cost.MultiplyCost(25);
00457     }
00458   } else if ((spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0) {
00459     /* Water can't remove objects that are buildable on water. */
00460     return CMD_ERROR;
00461   }
00462 
00463   switch (type) {
00464     case OBJECT_HQ: {
00465       Company *c = Company::Get(GetTileOwner(tile));
00466       if (flags & DC_EXEC) {
00467         c->location_of_HQ = INVALID_TILE; // reset HQ position
00468         SetWindowDirty(WC_COMPANY, c->index);
00469         CargoPacket::InvalidateAllFrom(ST_HEADQUARTERS, c->index);
00470       }
00471 
00472       /* cost of relocating company is 1% of company value */
00473       cost = CommandCost(EXPENSES_PROPERTY, CalculateCompanyValue(c) / 100);
00474       break;
00475     }
00476 
00477     case OBJECT_STATUE:
00478       if (flags & DC_EXEC) {
00479         Town *town = o->town;
00480         ClrBit(town->statues, GetTileOwner(tile));
00481         SetWindowDirty(WC_TOWN_AUTHORITY, town->index);
00482       }
00483       break;
00484 
00485     default:
00486       break;
00487   }
00488 
00489   if (flags & DC_EXEC) ReallyClearObjectTile(o);
00490 
00491   return cost;
00492 }
00493 
00494 static void AddAcceptedCargo_Object(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted)
00495 {
00496   if (!IsCompanyHQ(tile)) return;
00497 
00498   /* HQ accepts passenger and mail; but we have to divide the values
00499    * between 4 tiles it occupies! */
00500 
00501   /* HQ level (depends on company performance) in the range 1..5. */
00502   uint level = GetCompanyHQSize(tile) + 1;
00503 
00504   /* Top town building generates 10, so to make HQ interesting, the top
00505    * type makes 20. */
00506   acceptance[CT_PASSENGERS] += max(1U, level);
00507   SetBit(*always_accepted, CT_PASSENGERS);
00508 
00509   /* Top town building generates 4, HQ can make up to 8. The
00510    * proportion passengers:mail is different because such a huge
00511    * commercial building generates unusually high amount of mail
00512    * correspondence per physical visitor. */
00513   acceptance[CT_MAIL] += max(1U, level / 2);
00514   SetBit(*always_accepted, CT_MAIL);
00515 }
00516 
00517 
00518 static void GetTileDesc_Object(TileIndex tile, TileDesc *td)
00519 {
00520   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00521   td->str = spec->name;
00522   td->owner[0] = GetTileOwner(tile);
00523   td->build_date = Object::GetByTile(tile)->build_date;
00524 
00525   if (spec->grf_prop.grffile != NULL) {
00526     td->grf = GetGRFConfig(spec->grf_prop.grffile->grfid)->GetName();
00527   }
00528 }
00529 
00530 static void TileLoop_Object(TileIndex tile)
00531 {
00532   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00533   if (spec->flags & OBJECT_FLAG_ANIMATION) {
00534     const Object *o = Object::GetByTile(tile);
00535     TriggerObjectTileAnimation(o, tile, OAT_TILELOOP, spec);
00536     if (o->location.tile == tile) TriggerObjectAnimation(o, OAT_256_TICKS, spec);
00537   }
00538 
00539   if (IsTileOnWater(tile)) TileLoop_Water(tile);
00540 
00541   if (!IsCompanyHQ(tile)) return;
00542 
00543   /* HQ accepts passenger and mail; but we have to divide the values
00544    * between 4 tiles it occupies! */
00545 
00546   /* HQ level (depends on company performance) in the range 1..5. */
00547   uint level = GetCompanyHQSize(tile) + 1;
00548   assert(level < 6);
00549 
00550   StationFinder stations(TileArea(tile, 2, 2));
00551 
00552   uint r = Random();
00553   /* Top town buildings generate 250, so the top HQ type makes 256. */
00554   if (GB(r, 0, 8) < (256 / 4 / (6 - level))) {
00555     uint amt = GB(r, 0, 8) / 8 / 4 + 1;
00556     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00557     MoveGoodsToStation(CT_PASSENGERS, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00558   }
00559 
00560   /* Top town building generates 90, HQ can make up to 196. The
00561    * proportion passengers:mail is about the same as in the acceptance
00562    * equations. */
00563   if (GB(r, 8, 8) < (196 / 4 / (6 - level))) {
00564     uint amt = GB(r, 8, 8) / 8 / 4 + 1;
00565     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00566     MoveGoodsToStation(CT_MAIL, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00567   }
00568 }
00569 
00570 
00571 static TrackStatus GetTileTrackStatus_Object(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
00572 {
00573   return 0;
00574 }
00575 
00576 static bool ClickTile_Object(TileIndex tile)
00577 {
00578   if (!IsCompanyHQ(tile)) return false;
00579 
00580   ShowCompany(GetTileOwner(tile));
00581   return true;
00582 }
00583 
00584 static void AnimateTile_Object(TileIndex tile)
00585 {
00586   AnimateNewObjectTile(tile);
00587 }
00588 
00595 static bool HasTransmitter(TileIndex tile, void *user)
00596 {
00597   return IsTransmitterTile(tile);
00598 }
00599 
00600 void GenerateObjects()
00601 {
00602   if (_settings_game.game_creation.landscape == LT_TOYLAND) return;
00603 
00604   /* add radio tower */
00605   int radiotower_to_build = ScaleByMapSize(15); // maximum number of radio towers on the map
00606   int lighthouses_to_build = _settings_game.game_creation.landscape == LT_TROPIC ? 0 : ScaleByMapSize1D((Random() & 3) + 7);
00607 
00608   /* Scale the amount of lighthouses with the amount of land at the borders. */
00609   if (_settings_game.construction.freeform_edges && lighthouses_to_build != 0) {
00610     uint num_water_tiles = 0;
00611     for (uint x = 0; x < MapMaxX(); x++) {
00612       if (IsTileType(TileXY(x, 1), MP_WATER)) num_water_tiles++;
00613       if (IsTileType(TileXY(x, MapMaxY() - 1), MP_WATER)) num_water_tiles++;
00614     }
00615     for (uint y = 1; y < MapMaxY() - 1; y++) {
00616       if (IsTileType(TileXY(1, y), MP_WATER)) num_water_tiles++;
00617       if (IsTileType(TileXY(MapMaxX() - 1, y), MP_WATER)) num_water_tiles++;
00618     }
00619     /* The -6 is because the top borders are MP_VOID (-2) and all corners
00620      * are counted twice (-4). */
00621     lighthouses_to_build = lighthouses_to_build * num_water_tiles / (2 * MapMaxY() + 2 * MapMaxX() - 6);
00622   }
00623 
00624   SetGeneratingWorldProgress(GWP_OBJECT, radiotower_to_build + lighthouses_to_build);
00625 
00626   for (uint i = ScaleByMapSize(1000); i != 0 && Object::CanAllocateItem(); i--) {
00627     TileIndex tile = RandomTile();
00628 
00629     uint h;
00630     if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h >= TILE_HEIGHT * 4 && !IsBridgeAbove(tile)) {
00631       TileIndex t = tile;
00632       if (CircularTileSearch(&t, 9, HasTransmitter, NULL)) continue;
00633 
00634       BuildObject(OBJECT_TRANSMITTER, tile);
00635       IncreaseGeneratingWorldProgress(GWP_OBJECT);
00636       if (--radiotower_to_build == 0) break;
00637     }
00638   }
00639 
00640   /* add lighthouses */
00641   uint maxx = MapMaxX();
00642   uint maxy = MapMaxY();
00643   for (int loop_count = 0; loop_count < 1000 && lighthouses_to_build != 0 && Object::CanAllocateItem(); loop_count++) {
00644     uint r = Random();
00645 
00646     /* Scatter the lighthouses more evenly around the perimeter */
00647     int perimeter = (GB(r, 16, 16) % (2 * (maxx + maxy))) - maxy;
00648     DiagDirection dir;
00649     for (dir = DIAGDIR_NE; perimeter > 0; dir++) {
00650       perimeter -= (DiagDirToAxis(dir) == AXIS_X) ? maxx : maxy;
00651     }
00652 
00653     TileIndex tile;
00654     switch (dir) {
00655       default:
00656       case DIAGDIR_NE: tile = TileXY(maxx - 1, r % maxy); break;
00657       case DIAGDIR_SE: tile = TileXY(r % maxx, 1); break;
00658       case DIAGDIR_SW: tile = TileXY(1,        r % maxy); break;
00659       case DIAGDIR_NW: tile = TileXY(r % maxx, maxy - 1); break;
00660     }
00661 
00662     /* Only build lighthouses at tiles where the border is sea. */
00663     if (!IsTileType(tile, MP_WATER)) continue;
00664 
00665     for (int j = 0; j < 19; j++) {
00666       uint h;
00667       if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h <= TILE_HEIGHT * 2 && !IsBridgeAbove(tile)) {
00668         BuildObject(OBJECT_LIGHTHOUSE, tile);
00669         IncreaseGeneratingWorldProgress(GWP_OBJECT);
00670         lighthouses_to_build--;
00671         assert(tile < MapSize());
00672         break;
00673       }
00674       tile = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDiagDir(dir));
00675       if (tile == INVALID_TILE) break;
00676     }
00677   }
00678 }
00679 
00680 static void ChangeTileOwner_Object(TileIndex tile, Owner old_owner, Owner new_owner)
00681 {
00682   if (!IsTileOwner(tile, old_owner)) return;
00683 
00684   if (IsOwnedLand(tile) && new_owner != INVALID_OWNER) {
00685     SetTileOwner(tile, new_owner);
00686   } else if (IsStatueTile(tile)) {
00687     Town *t = Object::GetByTile(tile)->town;
00688     ClrBit(t->statues, old_owner);
00689     if (new_owner != INVALID_OWNER && !HasBit(t->statues, new_owner)) {
00690       /* Transfer ownership to the new company */
00691       SetBit(t->statues, new_owner);
00692       SetTileOwner(tile, new_owner);
00693     } else {
00694       ReallyClearObjectTile(Object::GetByTile(tile));
00695     }
00696 
00697     SetWindowDirty(WC_TOWN_AUTHORITY, t->index);
00698   } else {
00699     ReallyClearObjectTile(Object::GetByTile(tile));
00700   }
00701 }
00702 
00703 static CommandCost TerraformTile_Object(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
00704 {
00705   ObjectType type = GetObjectType(tile);
00706 
00707   if (type == OBJECT_OWNED_LAND) {
00708     /* Owned land remains unsold */
00709     CommandCost ret = CheckTileOwnership(tile);
00710     if (ret.Succeeded()) return CommandCost();
00711   } else if (AutoslopeEnabled() && type != OBJECT_TRANSMITTER && type != OBJECT_LIGHTHOUSE) {
00712     /* Behaviour:
00713      *  - Both new and old slope must not be steep.
00714      *  - TileMaxZ must not be changed.
00715      *  - Allow autoslope by default.
00716      *  - Disallow autoslope if callback succeeds and returns non-zero.
00717      */
00718     Slope tileh_old = GetTileSlope(tile, NULL);
00719     /* TileMaxZ must not be changed. Slopes must not be steep. */
00720     if (!IsSteepSlope(tileh_old) && !IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
00721       const ObjectSpec *spec = ObjectSpec::Get(type);
00722 
00723       /* Call callback 'disable autosloping for objects'. */
00724       if (HasBit(spec->callback_mask, CBM_OBJ_AUTOSLOPE)) {
00725         /* If the callback fails, allow autoslope. */
00726         uint16 res = GetObjectCallback(CBID_OBJECT_AUTOSLOPE, 0, 0, spec, Object::GetByTile(tile), tile);
00727         if ((res == 0) || (res == CALLBACK_FAILED)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00728       } else if (spec->enabled) {
00729         /* allow autoslope */
00730         return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00731       }
00732     }
00733   }
00734 
00735   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00736 }
00737 
00738 extern const TileTypeProcs _tile_type_object_procs = {
00739   DrawTile_Object,             // draw_tile_proc
00740   GetSlopeZ_Object,            // get_slope_z_proc
00741   ClearTile_Object,            // clear_tile_proc
00742   AddAcceptedCargo_Object,     // add_accepted_cargo_proc
00743   GetTileDesc_Object,          // get_tile_desc_proc
00744   GetTileTrackStatus_Object,   // get_tile_track_status_proc
00745   ClickTile_Object,            // click_tile_proc
00746   AnimateTile_Object,          // animate_tile_proc
00747   TileLoop_Object,             // tile_loop_clear
00748   ChangeTileOwner_Object,      // change_tile_owner_clear
00749   NULL,                        // add_produced_cargo_proc
00750   NULL,                        // vehicle_enter_tile_proc
00751   GetFoundation_Object,        // get_foundation_proc
00752   TerraformTile_Object,        // terraform_tile_proc
00753 };