object_cmd.cpp

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00001 /* $Id: object_cmd.cpp 23413 2011-12-03 23:40:23Z michi_cc $ */
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) {
00097       if (res >= 0x100) ErrorUnknownCallbackResult(spec->grf_prop.grffile->grfid, CBID_OBJECT_COLOUR, res);
00098       o->colour = GB(res, 0, 8);
00099     }
00100   }
00101 
00102   assert(o->town != NULL);
00103 
00104   TILE_AREA_LOOP(t, ta) {
00105     WaterClass wc = (IsWaterTile(t) ? GetWaterClass(t) : WATER_CLASS_INVALID);
00106     /* Update company infrastructure counts for objects build on canals owned by nobody. */
00107     if (wc == WATER_CLASS_CANAL && owner != OWNER_NONE && (IsTileOwner(tile, OWNER_NONE) || IsTileOwner(tile, OWNER_WATER))) {
00108       Company::Get(owner)->infrastructure.water++;
00109       DirtyCompanyInfrastructureWindows(owner);
00110     }
00111     MakeObject(t, type, owner, o->index, wc, Random());
00112     MarkTileDirtyByTile(t);
00113   }
00114 
00115   Object::IncTypeCount(type);
00116   if (spec->flags & OBJECT_FLAG_ANIMATION) TriggerObjectAnimation(o, OAT_BUILT, spec);
00117 }
00118 
00123 static void IncreaseAnimationStage(TileIndex tile)
00124 {
00125   TileArea ta = Object::GetByTile(tile)->location;
00126   TILE_AREA_LOOP(t, ta) {
00127     SetAnimationFrame(t, GetAnimationFrame(t) + 1);
00128     MarkTileDirtyByTile(t);
00129   }
00130 }
00131 
00133 #define GetCompanyHQSize GetAnimationFrame
00134 
00135 #define IncreaseCompanyHQSize IncreaseAnimationStage
00136 
00142 void UpdateCompanyHQ(TileIndex tile, uint score)
00143 {
00144   if (tile == INVALID_TILE) return;
00145 
00146   byte val;
00147   (val = 0, score < 170) ||
00148   (val++, score < 350) ||
00149   (val++, score < 520) ||
00150   (val++, score < 720) ||
00151   (val++, true);
00152 
00153   while (GetCompanyHQSize(tile) < val) {
00154     IncreaseCompanyHQSize(tile);
00155   }
00156 }
00157 
00162 void UpdateObjectColours(const Company *c)
00163 {
00164   Object *obj;
00165   FOR_ALL_OBJECTS(obj) {
00166     Owner owner = GetTileOwner(obj->location.tile);
00167     /* Not the current owner, so colour doesn't change. */
00168     if (owner != c->index) continue;
00169 
00170     const ObjectSpec *spec = ObjectSpec::GetByTile(obj->location.tile);
00171     /* Using the object colour callback, so not using company colour. */
00172     if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) continue;
00173 
00174     const Livery *l = c->livery;
00175     obj->colour = ((spec->flags & OBJECT_FLAG_2CC_COLOUR) ? (l->colour2 * 16) : 0) + l->colour1;
00176   }
00177 }
00178 
00179 extern CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool allow_steep, bool check_bridge);
00180 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags);
00181 
00191 CommandCost CmdBuildObject(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00192 {
00193   CommandCost cost(EXPENSES_PROPERTY);
00194 
00195   ObjectType type = (ObjectType)GB(p1, 0, 8);
00196   uint8 view = GB(p2, 0, 2);
00197   const ObjectSpec *spec = ObjectSpec::Get(type);
00198   if (!spec->IsAvailable()) return CMD_ERROR;
00199 
00200   if (spec->flags & OBJECT_FLAG_ONLY_IN_SCENEDIT && (_game_mode != GM_EDITOR || _current_company != OWNER_NONE)) return CMD_ERROR;
00201   if (spec->flags & OBJECT_FLAG_ONLY_IN_GAME && (_game_mode != GM_NORMAL || _current_company > MAX_COMPANIES)) return CMD_ERROR;
00202   if (view >= spec->views) return CMD_ERROR;
00203 
00204   if (!Object::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_OBJECTS);
00205   if (Town::GetNumItems() == 0) return_cmd_error(STR_ERROR_MUST_FOUND_TOWN_FIRST);
00206 
00207   int size_x = GB(spec->size, HasBit(view, 0) ? 4 : 0, 4);
00208   int size_y = GB(spec->size, HasBit(view, 0) ? 0 : 4, 4);
00209   TileArea ta(tile, size_x, size_y);
00210 
00211   if (type == OBJECT_OWNED_LAND) {
00212     /* Owned land is special as it can be placed on any slope. */
00213     cost.AddCost(DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
00214   } else {
00215     /* Check the surface to build on. At this time we can't actually execute the
00216      * the CLEAR_TILE commands since the newgrf callback later on can check
00217      * some information about the tiles. */
00218     bool allow_water = (spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0;
00219     bool allow_ground = (spec->flags & OBJECT_FLAG_NOT_ON_LAND) == 0;
00220     TILE_AREA_LOOP(t, ta) {
00221       if (HasTileWaterGround(t)) {
00222         if (!allow_water) return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00223         if (!IsWaterTile(t)) {
00224           /* Normal water tiles don't have to be cleared. For all other tile types clear
00225            * the tile but leave the water. */
00226           cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_NO_WATER & ~DC_EXEC, CMD_LANDSCAPE_CLEAR));
00227         } else {
00228           /* Can't build on water owned by another company. */
00229           Owner o = GetTileOwner(t);
00230           if (o != OWNER_NONE && o != OWNER_WATER) cost.AddCost(CheckOwnership(o, t));
00231         }
00232       } else {
00233         if (!allow_ground) return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
00234         /* For non-water tiles, we'll have to clear it before building. */
00235         cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR));
00236       }
00237     }
00238 
00239     /* So, now the surface is checked... check the slope of said surface. */
00240     int allowed_z;
00241     if (GetTileSlope(tile, &allowed_z) != SLOPE_FLAT) allowed_z++;
00242 
00243     TILE_AREA_LOOP(t, ta) {
00244       uint16 callback = CALLBACK_FAILED;
00245       if (HasBit(spec->callback_mask, CBM_OBJ_SLOPE_CHECK)) {
00246         TileIndex diff = t - tile;
00247         callback = GetObjectCallback(CBID_OBJECT_LAND_SLOPE_CHECK, GetTileSlope(t), TileY(diff) << 4 | TileX(diff), spec, NULL, t, view);
00248       }
00249 
00250       if (callback == CALLBACK_FAILED) {
00251         cost.AddCost(CheckBuildableTile(t, 0, allowed_z, false, false));
00252       } else {
00253         /* The meaning of bit 10 is inverted for a grf version < 8. */
00254         if (spec->grf_prop.grffile->grf_version < 8) ToggleBit(callback, 10);
00255         CommandCost ret = GetErrorMessageFromLocationCallbackResult(callback, spec->grf_prop.grffile->grfid, STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
00256         if (ret.Failed()) return ret;
00257       }
00258     }
00259 
00260     if (flags & DC_EXEC) {
00261       /* This is basically a copy of the loop above with the exception that we now
00262        * execute the commands and don't check for errors, since that's already done. */
00263       TILE_AREA_LOOP(t, ta) {
00264         if (HasTileWaterGround(t)) {
00265           if (!IsWaterTile(t)) {
00266             DoCommand(t, 0, 0, (flags & ~DC_NO_WATER) | DC_NO_MODIFY_TOWN_RATING, CMD_LANDSCAPE_CLEAR);
00267           }
00268         } else {
00269           DoCommand(t, 0, 0, flags | DC_NO_MODIFY_TOWN_RATING, CMD_LANDSCAPE_CLEAR);
00270         }
00271       }
00272     }
00273   }
00274   if (cost.Failed()) return cost;
00275 
00276   /* Finally do a check for bridges. */
00277   TILE_AREA_LOOP(t, ta) {
00278     if (MayHaveBridgeAbove(t) && IsBridgeAbove(t) && (
00279         !(spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) ||
00280         (GetTileMaxZ(t) + spec->height >= GetBridgeHeight(GetSouthernBridgeEnd(t))))) {
00281       return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00282     }
00283   }
00284 
00285   int hq_score = 0;
00286   switch (type) {
00287     case OBJECT_TRANSMITTER:
00288     case OBJECT_LIGHTHOUSE:
00289       if (GetTileSlope(tile) != SLOPE_FLAT) return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00290       break;
00291 
00292     case OBJECT_OWNED_LAND:
00293       if (IsTileType(tile, MP_OBJECT) &&
00294           IsTileOwner(tile, _current_company) &&
00295           IsOwnedLand(tile)) {
00296         return_cmd_error(STR_ERROR_YOU_ALREADY_OWN_IT);
00297       }
00298       break;
00299 
00300     case OBJECT_HQ: {
00301       Company *c = Company::Get(_current_company);
00302       if (c->location_of_HQ != INVALID_TILE) {
00303         /* We need to persuade a bit harder to remove the old HQ. */
00304         _current_company = OWNER_WATER;
00305         cost.AddCost(ClearTile_Object(c->location_of_HQ, flags));
00306         _current_company = c->index;
00307       }
00308 
00309       if (flags & DC_EXEC) {
00310         hq_score = UpdateCompanyRatingAndValue(c, false);
00311         c->location_of_HQ = tile;
00312         SetWindowDirty(WC_COMPANY, c->index);
00313       }
00314       break;
00315     }
00316 
00317     case OBJECT_STATUE:
00318       /* This may never be constructed using this method. */
00319       return CMD_ERROR;
00320 
00321     default: // i.e. NewGRF provided.
00322       break;
00323   }
00324 
00325   if (flags & DC_EXEC) {
00326     BuildObject(type, tile, _current_company, NULL, view);
00327 
00328     /* Make sure the HQ starts at the right size. */
00329     if (type == OBJECT_HQ) UpdateCompanyHQ(tile, hq_score);
00330   }
00331 
00332   cost.AddCost(ObjectSpec::Get(type)->GetBuildCost() * size_x * size_y);
00333   return cost;
00334 }
00335 
00336 
00337 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh);
00338 
00339 static void DrawTile_Object(TileInfo *ti)
00340 {
00341   ObjectType type = GetObjectType(ti->tile);
00342   const ObjectSpec *spec = ObjectSpec::Get(type);
00343 
00344   /* Fall back for when the object doesn't exist anymore. */
00345   if (!spec->enabled) type = OBJECT_TRANSMITTER;
00346 
00347   if ((spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) == 0) DrawFoundation(ti, GetFoundation_Object(ti->tile, ti->tileh));
00348 
00349   if (type < NEW_OBJECT_OFFSET) {
00350     const DrawTileSprites *dts = NULL;
00351     Owner to = GetTileOwner(ti->tile);
00352     PaletteID palette = to == OWNER_NONE ? PAL_NONE : COMPANY_SPRITE_COLOUR(to);
00353 
00354     if (type == OBJECT_HQ) {
00355       TileIndex diff = ti->tile - Object::GetByTile(ti->tile)->location.tile;
00356       dts = &_object_hq[GetCompanyHQSize(ti->tile) << 2 | TileY(diff) << 1 | TileX(diff)];
00357     } else {
00358       dts = &_objects[type];
00359     }
00360 
00361     if (spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) {
00362       /* If an object has no foundation, but tries to draw a (flat) ground
00363        * type... we have to be nice and convert that for them. */
00364       switch (dts->ground.sprite) {
00365         case SPR_FLAT_BARE_LAND:          DrawClearLandTile(ti, 0); break;
00366         case SPR_FLAT_1_THIRD_GRASS_TILE: DrawClearLandTile(ti, 1); break;
00367         case SPR_FLAT_2_THIRD_GRASS_TILE: DrawClearLandTile(ti, 2); break;
00368         case SPR_FLAT_GRASS_TILE:         DrawClearLandTile(ti, 3); break;
00369         default: DrawGroundSprite(dts->ground.sprite, palette);     break;
00370       }
00371     } else {
00372       DrawGroundSprite(dts->ground.sprite, palette);
00373     }
00374 
00375     if (!IsInvisibilitySet(TO_STRUCTURES)) {
00376       const DrawTileSeqStruct *dtss;
00377       foreach_draw_tile_seq(dtss, dts->seq) {
00378         AddSortableSpriteToDraw(
00379           dtss->image.sprite, palette,
00380           ti->x + dtss->delta_x, ti->y + dtss->delta_y,
00381           dtss->size_x, dtss->size_y,
00382           dtss->size_z, ti->z + dtss->delta_z,
00383           IsTransparencySet(TO_STRUCTURES)
00384         );
00385       }
00386     }
00387   } else {
00388     DrawNewObjectTile(ti, spec);
00389   }
00390 
00391   if (spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) DrawBridgeMiddle(ti);
00392 }
00393 
00394 static int GetSlopePixelZ_Object(TileIndex tile, uint x, uint y)
00395 {
00396   if (IsOwnedLand(tile)) {
00397     int z;
00398     Slope tileh = GetTilePixelSlope(tile, &z);
00399 
00400     return z + GetPartialPixelZ(x & 0xF, y & 0xF, tileh);
00401   } else {
00402     return GetTileMaxPixelZ(tile);
00403   }
00404 }
00405 
00406 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh)
00407 {
00408   return IsOwnedLand(tile) ? FOUNDATION_NONE : FlatteningFoundation(tileh);
00409 }
00410 
00415 static void ReallyClearObjectTile(Object *o)
00416 {
00417   Object::DecTypeCount(GetObjectType(o->location.tile));
00418   TILE_AREA_LOOP(tile_cur, o->location) {
00419     DeleteNewGRFInspectWindow(GSF_OBJECTS, tile_cur);
00420 
00421     MakeWaterKeepingClass(tile_cur, GetTileOwner(tile_cur));
00422   }
00423   delete o;
00424 }
00425 
00426 SmallVector<ClearedObjectArea, 4> _cleared_object_areas;
00427 
00433 ClearedObjectArea *FindClearedObject(TileIndex tile)
00434 {
00435   TileArea ta = TileArea(tile, 1, 1);
00436 
00437   const ClearedObjectArea *end = _cleared_object_areas.End();
00438   for (ClearedObjectArea *coa = _cleared_object_areas.Begin(); coa != end; coa++) {
00439     if (coa->area.Intersects(ta)) return coa;
00440   }
00441 
00442   return NULL;
00443 }
00444 
00445 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags)
00446 {
00447   ObjectType type = GetObjectType(tile);
00448   const ObjectSpec *spec = ObjectSpec::Get(type);
00449 
00450   /* Get to the northern most tile. */
00451   Object *o = Object::GetByTile(tile);
00452   TileArea ta = o->location;
00453 
00454   CommandCost cost(EXPENSES_CONSTRUCTION, spec->GetClearCost() * ta.w * ta.h / 5);
00455   if (spec->flags & OBJECT_FLAG_CLEAR_INCOME) cost.MultiplyCost(-1); // They get an income!
00456 
00457   /* Water can remove everything! */
00458   if (_current_company != OWNER_WATER) {
00459     if ((flags & DC_NO_WATER) && IsTileOnWater(tile)) {
00460       /* There is water under the object, treat it as water tile. */
00461       return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00462     } else if (!(spec->flags & OBJECT_FLAG_AUTOREMOVE) && (flags & DC_AUTO)) {
00463       /* No automatic removal by overbuilding stuff. */
00464       return_cmd_error(type == OBJECT_HQ ? STR_ERROR_COMPANY_HEADQUARTERS_IN : STR_ERROR_OBJECT_IN_THE_WAY);
00465     } else if (_game_mode == GM_EDITOR) {
00466       /* No further limitations for the editor. */
00467     } else if (GetTileOwner(tile) == OWNER_NONE) {
00468       /* Owned by nobody, so we can only remove it with brute force! */
00469       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00470     } else if (CheckTileOwnership(tile).Failed()) {
00471       /* We don't own it!. */
00472       return_cmd_error(STR_ERROR_OWNED_BY);
00473     } else if ((spec->flags & OBJECT_FLAG_CANNOT_REMOVE) != 0 && (spec->flags & OBJECT_FLAG_AUTOREMOVE) == 0) {
00474       /* In the game editor or with cheats we can remove, otherwise we can't. */
00475       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00476 
00477       /* Removing with the cheat costs more in TTDPatch / the specs. */
00478       cost.MultiplyCost(25);
00479     }
00480   } else if ((spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0) {
00481     /* Water can't remove objects that are buildable on water. */
00482     return CMD_ERROR;
00483   }
00484 
00485   switch (type) {
00486     case OBJECT_HQ: {
00487       Company *c = Company::Get(GetTileOwner(tile));
00488       if (flags & DC_EXEC) {
00489         c->location_of_HQ = INVALID_TILE; // reset HQ position
00490         SetWindowDirty(WC_COMPANY, c->index);
00491         CargoPacket::InvalidateAllFrom(ST_HEADQUARTERS, c->index);
00492       }
00493 
00494       /* cost of relocating company is 1% of company value */
00495       cost = CommandCost(EXPENSES_PROPERTY, CalculateCompanyValue(c) / 100);
00496       break;
00497     }
00498 
00499     case OBJECT_STATUE:
00500       if (flags & DC_EXEC) {
00501         Town *town = o->town;
00502         ClrBit(town->statues, GetTileOwner(tile));
00503         SetWindowDirty(WC_TOWN_AUTHORITY, town->index);
00504       }
00505       break;
00506 
00507     default:
00508       break;
00509   }
00510 
00511   ClearedObjectArea *cleared_area = _cleared_object_areas.Append();
00512   cleared_area->first_tile = tile;
00513   cleared_area->area = ta;
00514 
00515   if (flags & DC_EXEC) ReallyClearObjectTile(o);
00516 
00517   return cost;
00518 }
00519 
00520 static void AddAcceptedCargo_Object(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted)
00521 {
00522   if (!IsCompanyHQ(tile)) return;
00523 
00524   /* HQ accepts passenger and mail; but we have to divide the values
00525    * between 4 tiles it occupies! */
00526 
00527   /* HQ level (depends on company performance) in the range 1..5. */
00528   uint level = GetCompanyHQSize(tile) + 1;
00529 
00530   /* Top town building generates 10, so to make HQ interesting, the top
00531    * type makes 20. */
00532   acceptance[CT_PASSENGERS] += max(1U, level);
00533   SetBit(*always_accepted, CT_PASSENGERS);
00534 
00535   /* Top town building generates 4, HQ can make up to 8. The
00536    * proportion passengers:mail is different because such a huge
00537    * commercial building generates unusually high amount of mail
00538    * correspondence per physical visitor. */
00539   acceptance[CT_MAIL] += max(1U, level / 2);
00540   SetBit(*always_accepted, CT_MAIL);
00541 }
00542 
00543 
00544 static void GetTileDesc_Object(TileIndex tile, TileDesc *td)
00545 {
00546   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00547   td->str = spec->name;
00548   td->owner[0] = GetTileOwner(tile);
00549   td->build_date = Object::GetByTile(tile)->build_date;
00550 
00551   if (spec->grf_prop.grffile != NULL) {
00552     td->grf = GetGRFConfig(spec->grf_prop.grffile->grfid)->GetName();
00553   }
00554 }
00555 
00556 static void TileLoop_Object(TileIndex tile)
00557 {
00558   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00559   if (spec->flags & OBJECT_FLAG_ANIMATION) {
00560     Object *o = Object::GetByTile(tile);
00561     TriggerObjectTileAnimation(o, tile, OAT_TILELOOP, spec);
00562     if (o->location.tile == tile) TriggerObjectAnimation(o, OAT_256_TICKS, spec);
00563   }
00564 
00565   if (IsTileOnWater(tile)) TileLoop_Water(tile);
00566 
00567   if (!IsCompanyHQ(tile)) return;
00568 
00569   /* HQ accepts passenger and mail; but we have to divide the values
00570    * between 4 tiles it occupies! */
00571 
00572   /* HQ level (depends on company performance) in the range 1..5. */
00573   uint level = GetCompanyHQSize(tile) + 1;
00574   assert(level < 6);
00575 
00576   StationFinder stations(TileArea(tile, 2, 2));
00577 
00578   uint r = Random();
00579   /* Top town buildings generate 250, so the top HQ type makes 256. */
00580   if (GB(r, 0, 8) < (256 / 4 / (6 - level))) {
00581     uint amt = GB(r, 0, 8) / 8 / 4 + 1;
00582     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00583     MoveGoodsToStation(CT_PASSENGERS, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00584   }
00585 
00586   /* Top town building generates 90, HQ can make up to 196. The
00587    * proportion passengers:mail is about the same as in the acceptance
00588    * equations. */
00589   if (GB(r, 8, 8) < (196 / 4 / (6 - level))) {
00590     uint amt = GB(r, 8, 8) / 8 / 4 + 1;
00591     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00592     MoveGoodsToStation(CT_MAIL, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00593   }
00594 }
00595 
00596 
00597 static TrackStatus GetTileTrackStatus_Object(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
00598 {
00599   return 0;
00600 }
00601 
00602 static bool ClickTile_Object(TileIndex tile)
00603 {
00604   if (!IsCompanyHQ(tile)) return false;
00605 
00606   ShowCompany(GetTileOwner(tile));
00607   return true;
00608 }
00609 
00610 static void AnimateTile_Object(TileIndex tile)
00611 {
00612   AnimateNewObjectTile(tile);
00613 }
00614 
00621 static bool HasTransmitter(TileIndex tile, void *user)
00622 {
00623   return IsTransmitterTile(tile);
00624 }
00625 
00626 void GenerateObjects()
00627 {
00628   if (_settings_game.game_creation.landscape == LT_TOYLAND) return;
00629 
00630   /* add radio tower */
00631   int radiotower_to_build = ScaleByMapSize(15); // maximum number of radio towers on the map
00632   int lighthouses_to_build = _settings_game.game_creation.landscape == LT_TROPIC ? 0 : ScaleByMapSize1D((Random() & 3) + 7);
00633 
00634   /* Scale the amount of lighthouses with the amount of land at the borders. */
00635   if (_settings_game.construction.freeform_edges && lighthouses_to_build != 0) {
00636     uint num_water_tiles = 0;
00637     for (uint x = 0; x < MapMaxX(); x++) {
00638       if (IsTileType(TileXY(x, 1), MP_WATER)) num_water_tiles++;
00639       if (IsTileType(TileXY(x, MapMaxY() - 1), MP_WATER)) num_water_tiles++;
00640     }
00641     for (uint y = 1; y < MapMaxY() - 1; y++) {
00642       if (IsTileType(TileXY(1, y), MP_WATER)) num_water_tiles++;
00643       if (IsTileType(TileXY(MapMaxX() - 1, y), MP_WATER)) num_water_tiles++;
00644     }
00645     /* The -6 is because the top borders are MP_VOID (-2) and all corners
00646      * are counted twice (-4). */
00647     lighthouses_to_build = lighthouses_to_build * num_water_tiles / (2 * MapMaxY() + 2 * MapMaxX() - 6);
00648   }
00649 
00650   SetGeneratingWorldProgress(GWP_OBJECT, radiotower_to_build + lighthouses_to_build);
00651 
00652   for (uint i = ScaleByMapSize(1000); i != 0 && Object::CanAllocateItem(); i--) {
00653     TileIndex tile = RandomTile();
00654 
00655     int h;
00656     if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h >= 4 && !IsBridgeAbove(tile)) {
00657       TileIndex t = tile;
00658       if (CircularTileSearch(&t, 9, HasTransmitter, NULL)) continue;
00659 
00660       BuildObject(OBJECT_TRANSMITTER, tile);
00661       IncreaseGeneratingWorldProgress(GWP_OBJECT);
00662       if (--radiotower_to_build == 0) break;
00663     }
00664   }
00665 
00666   /* add lighthouses */
00667   uint maxx = MapMaxX();
00668   uint maxy = MapMaxY();
00669   for (int loop_count = 0; loop_count < 1000 && lighthouses_to_build != 0 && Object::CanAllocateItem(); loop_count++) {
00670     uint r = Random();
00671 
00672     /* Scatter the lighthouses more evenly around the perimeter */
00673     int perimeter = (GB(r, 16, 16) % (2 * (maxx + maxy))) - maxy;
00674     DiagDirection dir;
00675     for (dir = DIAGDIR_NE; perimeter > 0; dir++) {
00676       perimeter -= (DiagDirToAxis(dir) == AXIS_X) ? maxx : maxy;
00677     }
00678 
00679     TileIndex tile;
00680     switch (dir) {
00681       default:
00682       case DIAGDIR_NE: tile = TileXY(maxx - 1, r % maxy); break;
00683       case DIAGDIR_SE: tile = TileXY(r % maxx, 1); break;
00684       case DIAGDIR_SW: tile = TileXY(1,        r % maxy); break;
00685       case DIAGDIR_NW: tile = TileXY(r % maxx, maxy - 1); break;
00686     }
00687 
00688     /* Only build lighthouses at tiles where the border is sea. */
00689     if (!IsTileType(tile, MP_WATER)) continue;
00690 
00691     for (int j = 0; j < 19; j++) {
00692       int h;
00693       if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h <= 2 && !IsBridgeAbove(tile)) {
00694         BuildObject(OBJECT_LIGHTHOUSE, tile);
00695         IncreaseGeneratingWorldProgress(GWP_OBJECT);
00696         lighthouses_to_build--;
00697         assert(tile < MapSize());
00698         break;
00699       }
00700       tile = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDiagDir(dir));
00701       if (tile == INVALID_TILE) break;
00702     }
00703   }
00704 }
00705 
00706 static void ChangeTileOwner_Object(TileIndex tile, Owner old_owner, Owner new_owner)
00707 {
00708   if (!IsTileOwner(tile, old_owner)) return;
00709 
00710   if (IsOwnedLand(tile) && new_owner != INVALID_OWNER) {
00711     SetTileOwner(tile, new_owner);
00712   } else if (IsStatueTile(tile)) {
00713     Town *t = Object::GetByTile(tile)->town;
00714     ClrBit(t->statues, old_owner);
00715     if (new_owner != INVALID_OWNER && !HasBit(t->statues, new_owner)) {
00716       /* Transfer ownership to the new company */
00717       SetBit(t->statues, new_owner);
00718       SetTileOwner(tile, new_owner);
00719     } else {
00720       ReallyClearObjectTile(Object::GetByTile(tile));
00721     }
00722 
00723     SetWindowDirty(WC_TOWN_AUTHORITY, t->index);
00724   } else {
00725     ReallyClearObjectTile(Object::GetByTile(tile));
00726   }
00727 }
00728 
00729 static CommandCost TerraformTile_Object(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
00730 {
00731   ObjectType type = GetObjectType(tile);
00732 
00733   if (type == OBJECT_OWNED_LAND) {
00734     /* Owned land remains unsold */
00735     CommandCost ret = CheckTileOwnership(tile);
00736     if (ret.Succeeded()) return CommandCost();
00737   } else if (AutoslopeEnabled() && type != OBJECT_TRANSMITTER && type != OBJECT_LIGHTHOUSE) {
00738     /* Behaviour:
00739      *  - Both new and old slope must not be steep.
00740      *  - TileMaxZ must not be changed.
00741      *  - Allow autoslope by default.
00742      *  - Disallow autoslope if callback succeeds and returns non-zero.
00743      */
00744     Slope tileh_old = GetTileSlope(tile);
00745     /* TileMaxZ must not be changed. Slopes must not be steep. */
00746     if (!IsSteepSlope(tileh_old) && !IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
00747       const ObjectSpec *spec = ObjectSpec::Get(type);
00748 
00749       /* Call callback 'disable autosloping for objects'. */
00750       if (HasBit(spec->callback_mask, CBM_OBJ_AUTOSLOPE)) {
00751         /* If the callback fails, allow autoslope. */
00752         uint16 res = GetObjectCallback(CBID_OBJECT_AUTOSLOPE, 0, 0, spec, Object::GetByTile(tile), tile);
00753         if (res == CALLBACK_FAILED || !ConvertBooleanCallback(spec->grf_prop.grffile, CBID_OBJECT_AUTOSLOPE, res)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00754       } else if (spec->enabled) {
00755         /* allow autoslope */
00756         return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00757       }
00758     }
00759   }
00760 
00761   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00762 }
00763 
00764 extern const TileTypeProcs _tile_type_object_procs = {
00765   DrawTile_Object,             // draw_tile_proc
00766   GetSlopePixelZ_Object,       // get_slope_z_proc
00767   ClearTile_Object,            // clear_tile_proc
00768   AddAcceptedCargo_Object,     // add_accepted_cargo_proc
00769   GetTileDesc_Object,          // get_tile_desc_proc
00770   GetTileTrackStatus_Object,   // get_tile_track_status_proc
00771   ClickTile_Object,            // click_tile_proc
00772   AnimateTile_Object,          // animate_tile_proc
00773   TileLoop_Object,             // tile_loop_proc
00774   ChangeTileOwner_Object,      // change_tile_owner_proc
00775   NULL,                        // add_produced_cargo_proc
00776   NULL,                        // vehicle_enter_tile_proc
00777   GetFoundation_Object,        // get_foundation_proc
00778   TerraformTile_Object,        // terraform_tile_proc
00779 };