# 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_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         }
    00219       } else {
    00220         if (!allow_ground) return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
    00221         /* For non-water tiles, we'll have to clear it before building. */
    00222         cost.AddCost(DoCommand(t, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
    00223       }
    00224     }
    00225
    00226     /* So, now the surface is checked... check the slope of said surface. */
    00227     int allowed_z;
    00228     if (GetTileSlope(tile, (uint*)&allowed_z) != SLOPE_FLAT) allowed_z += TILE_HEIGHT;
    00229
    00230     TILE_AREA_LOOP(t, ta) {
    00231       uint16 callback = CALLBACK_FAILED;
    00232       if (HasBit(spec->callback_mask, CBM_OBJ_SLOPE_CHECK)) {
    00233         TileIndex diff = t - tile;
    00234         callback = GetObjectCallback(CBID_OBJECT_LAND_SLOPE_CHECK, GetTileSlope(t, NULL), TileY(diff) << 4 | TileX(diff), spec, NULL, t, view);
    00235       }
    00236
    00237       if (callback == CALLBACK_FAILED) {
    00238         cost.AddCost(CheckBuildableTile(t, 0, allowed_z, false));
    00239       } else if (callback != 0) {
    00240         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00241       }
    00242     }
    00243   }
    00244   if (cost.Failed()) return cost;
    00245
    00246   /* Finally do a check for bridges. */
    00247   TILE_AREA_LOOP(t, ta) {
    00248     if (MayHaveBridgeAbove(t) && IsBridgeAbove(t) && (
    00249         !(spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) ||
    00250         (GetTileMaxZ(t) + spec->height * TILE_HEIGHT >= GetBridgeHeight(GetSouthernBridgeEnd(t))))) {
    00251       return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    00252     }
    00253   }
    00254
    00255   int hq_score = 0;
    00256   switch (type) {
    00257     case OBJECT_TRANSMITTER:
    00258     case OBJECT_LIGHTHOUSE:
    00259       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00260       break;
    00261
    00262     case OBJECT_OWNED_LAND:
    00263       if (IsTileType(tile, MP_OBJECT) &&
    00264           IsTileOwner(tile, _current_company) &&
    00265           IsOwnedLand(tile)) {
    00266         return_cmd_error(STR_ERROR_YOU_ALREADY_OWN_IT);
    00267       }
    00268       break;
    00269
    00270     case OBJECT_HQ: {
    00271       Company *c = Company::Get(_current_company);
    00272       if (c->location_of_HQ != INVALID_TILE) {
    00273         /* We need to persuade a bit harder to remove the old HQ. */
    00274         _current_company = OWNER_WATER;
    00275         cost.AddCost(ClearTile_Object(c->location_of_HQ, flags));
    00276         _current_company = c->index;
    00277       }
    00278
    00279       if (flags & DC_EXEC) {
    00280         hq_score = UpdateCompanyRatingAndValue(c, false);
    00281         c->location_of_HQ = tile;
    00282         SetWindowDirty(WC_COMPANY, c->index);
    00283       }
    00284       break;
    00285     }
    00286
    00287     case OBJECT_STATUE:
    00288       /* This may never be constructed using this method. */
    00289       return CMD_ERROR;
    00290
    00291     default: // i.e. NewGRF provided.
    00292       break;
    00293   }
    00294
    00295   if (flags & DC_EXEC) {
    00296     BuildObject(type, tile, _current_company, NULL, view);
    00297
    00298     /* Make sure the HQ starts at the right size. */
    00299     if (type == OBJECT_HQ) UpdateCompanyHQ(tile, hq_score);
    00300   }
    00301
    00302   cost.AddCost(ObjectSpec::Get(type)->GetBuildCost() * size_x * size_y);
    00303   return cost;
    00304 }
    00305
    00306
    00307 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh);
    00308
    00309 static void DrawTile_Object(TileInfo *ti)
    00310 {
    00311   ObjectType type = GetObjectType(ti->tile);
    00312   const ObjectSpec *spec = ObjectSpec::Get(type);
    00313
    00314   /* Fall back for when the object doesn't exist anymore. */
    00315   if (!spec->enabled) type = OBJECT_TRANSMITTER;
    00316
    00317   if ((spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) == 0) DrawFoundation(ti, GetFoundation_Object(ti->tile, ti->tileh));
    00318
    00319   if (type < NEW_OBJECT_OFFSET) {
    00320     const DrawTileSprites *dts = NULL;
    00321     Owner to = GetTileOwner(ti->tile);
    00322     PaletteID palette = to == OWNER_NONE ? PAL_NONE : COMPANY_SPRITE_COLOUR(to);
    00323
    00324     if (type == OBJECT_HQ) {
    00325       TileIndex diff = ti->tile - Object::GetByTile(ti->tile)->location.tile;
    00326       dts = &_object_hq[GetCompanyHQSize(ti->tile) << 2 | TileY(diff) << 1 | TileX(diff)];
    00327     } else {
    00328       dts = &_objects[type];
    00329     }
    00330
    00331     if (spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) {
    00332       /* If an object has no foundation, but tries to draw a (flat) ground
    00333        * type... we have to be nice and convert that for them. */
    00334       switch (dts->ground.sprite) {
    00335         case SPR_FLAT_BARE_LAND:          DrawClearLandTile(ti, 0); break;
    00336         case SPR_FLAT_1_THIRD_GRASS_TILE: DrawClearLandTile(ti, 1); break;
    00337         case SPR_FLAT_2_THIRD_GRASS_TILE: DrawClearLandTile(ti, 2); break;
    00338         case SPR_FLAT_GRASS_TILE:         DrawClearLandTile(ti, 3); break;
    00339         default: DrawGroundSprite(dts->ground.sprite, palette);     break;
    00340       }
    00341     } else {
    00342       DrawGroundSprite(dts->ground.sprite, palette);
    00343     }
    00344
    00345     if (!IsInvisibilitySet(TO_STRUCTURES)) {
    00346       const DrawTileSeqStruct *dtss;
    00347       foreach_draw_tile_seq(dtss, dts->seq) {
    00348         AddSortableSpriteToDraw(
    00349           dtss->image.sprite, palette,
    00350           ti->x + dtss->delta_x, ti->y + dtss->delta_y,
    00351           dtss->size_x, dtss->size_y,
    00352           dtss->size_z, ti->z + dtss->delta_z,
    00353           IsTransparencySet(TO_STRUCTURES)
    00354         );
    00355       }
    00356     }
    00357   } else {
    00358     DrawNewObjectTile(ti, spec);
    00359   }
    00360
    00361   if (spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) DrawBridgeMiddle(ti);
    00362 }
    00363
    00364 static uint GetSlopeZ_Object(TileIndex tile, uint x, uint y)
    00365 {
    00366   if (IsOwnedLand(tile)) {
    00367     uint z;
    00368     Slope tileh = GetTileSlope(tile, &z);
    00369
    00370     return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
    00371   } else {
    00372     return GetTileMaxZ(tile);
    00373   }
    00374 }
    00375
    00376 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh)
    00377 {
    00378   return IsOwnedLand(tile) ? FOUNDATION_NONE : FlatteningFoundation(tileh);
    00379 }
    00380
    00385 static void ReallyClearObjectTile(Object *o)
    00386 {
    00387   Object::DecTypeCount(GetObjectType(o->location.tile));
    00388   TILE_AREA_LOOP(tile_cur, o->location) {
    00389     DeleteNewGRFInspectWindow(GSF_OBJECTS, tile_cur);
    00390
    00391     MakeWaterKeepingClass(tile_cur, GetTileOwner(tile_cur));
    00392   }
    00393   delete o;
    00394 }
    00395
    00396 SmallVector<ClearedObjectArea, 4> _cleared_object_areas;
    00397
    00403 ClearedObjectArea *FindClearedObject(TileIndex tile)
    00404 {
    00405   TileArea ta = TileArea(tile, 1, 1);
    00406
    00407   const ClearedObjectArea *end = _cleared_object_areas.End();
    00408   for (ClearedObjectArea *coa = _cleared_object_areas.Begin(); coa != end; coa++) {
    00409     if (coa->area.Intersects(ta)) return coa;
    00410   }
    00411
    00412   return NULL;
    00413 }
    00414
    00415 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags)
    00416 {
    00417   ObjectType type = GetObjectType(tile);
    00418   const ObjectSpec *spec = ObjectSpec::Get(type);
    00419
    00420   /* Get to the northern most tile. */
    00421   Object *o = Object::GetByTile(tile);
    00422   TileArea ta = o->location;
    00423
    00424   ClearedObjectArea *cleared_area = _cleared_object_areas.Append();
    00425   cleared_area->first_tile = tile;
    00426   cleared_area->area = ta;
    00427
    00428   CommandCost cost(EXPENSES_CONSTRUCTION, spec->GetClearCost() * ta.w * ta.h / 5);
    00429   if (spec->flags & OBJECT_FLAG_CLEAR_INCOME) cost.MultiplyCost(-1); // They get an income!
    00430
    00431   /* Water can remove everything! */
    00432   if (_current_company != OWNER_WATER) {
    00433     if ((flags & DC_NO_WATER) && IsTileOnWater(tile)) {
    00434       /* There is water under the object, treat it as water tile. */
    00435       return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
    00436     } else if (!(spec->flags & OBJECT_FLAG_AUTOREMOVE) && (flags & DC_AUTO)) {
    00437       /* No automatic removal by overbuilding stuff. */
    00438       return_cmd_error(type == OBJECT_HQ ? STR_ERROR_COMPANY_HEADQUARTERS_IN : STR_ERROR_OBJECT_IN_THE_WAY);
    00439     } else if (_game_mode == GM_EDITOR) {
    00440       /* No further limitations for the editor. */
    00441     } else if (GetTileOwner(tile) == OWNER_NONE) {
    00442       /* Owned by nobody, so we can only remove it with brute force! */
    00443       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
    00444     } else if (CheckTileOwnership(tile).Failed()) {
    00445       /* We don't own it!. */
    00446       return_cmd_error(STR_ERROR_OWNED_BY);
    00447     } else if ((spec->flags & OBJECT_FLAG_CANNOT_REMOVE) != 0 && (spec->flags & OBJECT_FLAG_AUTOREMOVE) == 0) {
    00448       /* In the game editor or with cheats we can remove, otherwise we can't. */
    00449       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
    00450
    00451       /* Removing with the cheat costs more in TTDPatch / the specs. */
    00452       cost.MultiplyCost(25);
    00453     }
    00454   } else if ((spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0) {
    00455     /* Water can't remove objects that are buildable on water. */
    00456     return CMD_ERROR;
    00457   }
    00458
    00459   switch (type) {
    00460     case OBJECT_HQ: {
    00461       Company *c = Company::Get(GetTileOwner(tile));
    00462       if (flags & DC_EXEC) {
    00463         c->location_of_HQ = INVALID_TILE; // reset HQ position
    00464         SetWindowDirty(WC_COMPANY, c->index);
    00465         CargoPacket::InvalidateAllFrom(ST_HEADQUARTERS, c->index);
    00466       }
    00467
    00468       /* cost of relocating company is 1% of company value */
    00469       cost = CommandCost(EXPENSES_PROPERTY, CalculateCompanyValue(c) / 100);
    00470       break;
    00471     }
    00472
    00473     case OBJECT_STATUE:
    00474       if (flags & DC_EXEC) {
    00475         Town *town = o->town;
    00476         ClrBit(town->statues, GetTileOwner(tile));
    00477         SetWindowDirty(WC_TOWN_AUTHORITY, town->index);
    00478       }
    00479       break;
    00480
    00481     default:
    00482       break;
    00483   }
    00484
    00485   if (flags & DC_EXEC) ReallyClearObjectTile(o);
    00486
    00487   return cost;
    00488 }
    00489
    00490 static void AddAcceptedCargo_Object(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted)
    00491 {
    00492   if (!IsCompanyHQ(tile)) return;
    00493
    00494   /* HQ accepts passenger and mail; but we have to divide the values
    00495    * between 4 tiles it occupies! */
    00496
    00497   /* HQ level (depends on company performance) in the range 1..5. */
    00498   uint level = GetCompanyHQSize(tile) + 1;
    00499
    00500   /* Top town building generates 10, so to make HQ interesting, the top
    00501    * type makes 20. */
    00502   acceptance[CT_PASSENGERS] += max(1U, level);
    00503   SetBit(*always_accepted, CT_PASSENGERS);
    00504
    00505   /* Top town building generates 4, HQ can make up to 8. The
    00506    * proportion passengers:mail is different because such a huge
    00507    * commercial building generates unusually high amount of mail
    00508    * correspondence per physical visitor. */
    00509   acceptance[CT_MAIL] += max(1U, level / 2);
    00510   SetBit(*always_accepted, CT_MAIL);
    00511 }
    00512
    00513
    00514 static void GetTileDesc_Object(TileIndex tile, TileDesc *td)
    00515 {
    00516   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
    00517   td->str = spec->name;
    00518   td->owner[0] = GetTileOwner(tile);
    00519   td->build_date = Object::GetByTile(tile)->build_date;
    00520
    00521   if (spec->grf_prop.grffile != NULL) {
    00522     td->grf = GetGRFConfig(spec->grf_prop.grffile->grfid)->GetName();
    00523   }
    00524 }
    00525
    00526 static void TileLoop_Object(TileIndex tile)
    00527 {
    00528   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
    00529   if (spec->flags & OBJECT_FLAG_ANIMATION) {
    00530     const Object *o = Object::GetByTile(tile);
    00531     TriggerObjectTileAnimation(o, tile, OAT_TILELOOP, spec);
    00532     if (o->location.tile == tile) TriggerObjectAnimation(o, OAT_256_TICKS, spec);
    00533   }
    00534
    00535   if (IsTileOnWater(tile)) TileLoop_Water(tile);
    00536
    00537   if (!IsCompanyHQ(tile)) return;
    00538
    00539   /* HQ accepts passenger and mail; but we have to divide the values
    00540    * between 4 tiles it occupies! */
    00541
    00542   /* HQ level (depends on company performance) in the range 1..5. */
    00543   uint level = GetCompanyHQSize(tile) + 1;
    00544   assert(level < 6);
    00545
    00546   StationFinder stations(TileArea(tile, 2, 2));
    00547
    00548   uint r = Random();
    00549   /* Top town buildings generate 250, so the top HQ type makes 256. */
    00550   if (GB(r, 0, 8) < (256 / 4 / (6 - level))) {
    00551     uint amt = GB(r, 0, 8) / 8 / 4 + 1;
    00552     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
    00553     MoveGoodsToStation(CT_PASSENGERS, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
    00554   }
    00555
    00556   /* Top town building generates 90, HQ can make up to 196. The
    00557    * proportion passengers:mail is about the same as in the acceptance
    00558    * equations. */
    00559   if (GB(r, 8, 8) < (196 / 4 / (6 - level))) {
    00560     uint amt = GB(r, 8, 8) / 8 / 4 + 1;
    00561     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
    00562     MoveGoodsToStation(CT_MAIL, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
    00563   }
    00564 }
    00565
    00566
    00567 static TrackStatus GetTileTrackStatus_Object(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
    00568 {
    00569   return 0;
    00570 }
    00571
    00572 static bool ClickTile_Object(TileIndex tile)
    00573 {
    00574   if (!IsCompanyHQ(tile)) return false;
    00575
    00576   ShowCompany(GetTileOwner(tile));
    00577   return true;
    00578 }
    00579
    00580 static void AnimateTile_Object(TileIndex tile)
    00581 {
    00582   AnimateNewObjectTile(tile);
    00583 }
    00584
    00591 static bool HasTransmitter(TileIndex tile, void *user)
    00592 {
    00593   return IsTransmitterTile(tile);
    00594 }
    00595
    00596 void GenerateObjects()
    00597 {
    00598   if (_settings_game.game_creation.landscape == LT_TOYLAND) return;
    00599
    00600   /* add radio tower */
    00601   int radiotower_to_build = ScaleByMapSize(15); // maximum number of radio towers on the map
    00602   int lighthouses_to_build = _settings_game.game_creation.landscape == LT_TROPIC ? 0 : ScaleByMapSize1D((Random() & 3) + 7);
    00603
    00604   /* Scale the amount of lighthouses with the amount of land at the borders. */
    00605   if (_settings_game.construction.freeform_edges && lighthouses_to_build != 0) {
    00606     uint num_water_tiles = 0;
    00607     for (uint x = 0; x < MapMaxX(); x++) {
    00608       if (IsTileType(TileXY(x, 1), MP_WATER)) num_water_tiles++;
    00609       if (IsTileType(TileXY(x, MapMaxY() - 1), MP_WATER)) num_water_tiles++;
    00610     }
    00611     for (uint y = 1; y < MapMaxY() - 1; y++) {
    00612       if (IsTileType(TileXY(1, y), MP_WATER)) num_water_tiles++;
    00613       if (IsTileType(TileXY(MapMaxX() - 1, y), MP_WATER)) num_water_tiles++;
    00614     }
    00615     /* The -6 is because the top borders are MP_VOID (-2) and all corners
    00616      * are counted twice (-4). */
    00617     lighthouses_to_build = lighthouses_to_build * num_water_tiles / (2 * MapMaxY() + 2 * MapMaxX() - 6);
    00618   }
    00619
    00620   SetGeneratingWorldProgress(GWP_OBJECT, radiotower_to_build + lighthouses_to_build);
    00621
    00622   for (uint i = ScaleByMapSize(1000); i != 0 && Object::CanAllocateItem(); i--) {
    00623     TileIndex tile = RandomTile();
    00624
    00625     uint h;
    00626     if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h >= TILE_HEIGHT * 4 && !IsBridgeAbove(tile)) {
    00627       TileIndex t = tile;
    00628       if (CircularTileSearch(&t, 9, HasTransmitter, NULL)) continue;
    00629
    00630       BuildObject(OBJECT_TRANSMITTER, tile);
    00631       IncreaseGeneratingWorldProgress(GWP_OBJECT);
    00632       if (--radiotower_to_build == 0) break;
    00633     }
    00634   }
    00635
    00636   /* add lighthouses */
    00637   uint maxx = MapMaxX();
    00638   uint maxy = MapMaxY();
    00639   for (int loop_count = 0; loop_count < 1000 && lighthouses_to_build != 0 && Object::CanAllocateItem(); loop_count++) {
    00640     uint r = Random();
    00641
    00642     /* Scatter the lighthouses more evenly around the perimeter */
    00643     int perimeter = (GB(r, 16, 16) % (2 * (maxx + maxy))) - maxy;
    00644     DiagDirection dir;
    00645     for (dir = DIAGDIR_NE; perimeter > 0; dir++) {
    00646       perimeter -= (DiagDirToAxis(dir) == AXIS_X) ? maxx : maxy;
    00647     }
    00648
    00649     TileIndex tile;
    00650     switch (dir) {
    00651       default:
    00652       case DIAGDIR_NE: tile = TileXY(maxx - 1, r % maxy); break;
    00653       case DIAGDIR_SE: tile = TileXY(r % maxx, 1); break;
    00654       case DIAGDIR_SW: tile = TileXY(1,        r % maxy); break;
    00655       case DIAGDIR_NW: tile = TileXY(r % maxx, maxy - 1); break;
    00656     }
    00657
    00658     /* Only build lighthouses at tiles where the border is sea. */
    00659     if (!IsTileType(tile, MP_WATER)) continue;
    00660
    00661     for (int j = 0; j < 19; j++) {
    00662       uint h;
    00663       if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h <= TILE_HEIGHT * 2 && !IsBridgeAbove(tile)) {
    00664         BuildObject(OBJECT_LIGHTHOUSE, tile);
    00665         IncreaseGeneratingWorldProgress(GWP_OBJECT);
    00666         lighthouses_to_build--;
    00667         assert(tile < MapSize());
    00668         break;
    00669       }
    00670       tile = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDiagDir(dir));
    00671       if (tile == INVALID_TILE) break;
    00672     }
    00673   }
    00674 }
    00675
    00676 static void ChangeTileOwner_Object(TileIndex tile, Owner old_owner, Owner new_owner)
    00677 {
    00678   if (!IsTileOwner(tile, old_owner)) return;
    00679
    00680   if (IsOwnedLand(tile) && new_owner != INVALID_OWNER) {
    00681     SetTileOwner(tile, new_owner);
    00682   } else if (IsStatueTile(tile)) {
    00683     Town *t = Object::GetByTile(tile)->town;
    00684     ClrBit(t->statues, old_owner);
    00685     if (new_owner != INVALID_OWNER && !HasBit(t->statues, new_owner)) {
    00686       /* Transfer ownership to the new company */
    00687       SetBit(t->statues, new_owner);
    00688       SetTileOwner(tile, new_owner);
    00689     } else {
    00690       ReallyClearObjectTile(Object::GetByTile(tile));
    00691     }
    00692
    00693     SetWindowDirty(WC_TOWN_AUTHORITY, t->index);
    00694   } else {
    00695     ReallyClearObjectTile(Object::GetByTile(tile));
    00696   }
    00697 }
    00698
    00699 static CommandCost TerraformTile_Object(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
    00700 {
    00701   ObjectType type = GetObjectType(tile);
    00702
    00703   if (type == OBJECT_OWNED_LAND) {
    00704     /* Owned land remains unsold */
    00705     CommandCost ret = CheckTileOwnership(tile);
    00706     if (ret.Succeeded()) return CommandCost();
    00707   } else if (AutoslopeEnabled() && type != OBJECT_TRANSMITTER && type != OBJECT_LIGHTHOUSE) {
    00708     /* Behaviour:
    00709      *  - Both new and old slope must not be steep.
    00710      *  - TileMaxZ must not be changed.
    00711      *  - Allow autoslope by default.
    00712      *  - Disallow autoslope if callback succeeds and returns non-zero.
    00713      */
    00714     Slope tileh_old = GetTileSlope(tile, NULL);
    00715     /* TileMaxZ must not be changed. Slopes must not be steep. */
    00716     if (!IsSteepSlope(tileh_old) && !IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
    00717       const ObjectSpec *spec = ObjectSpec::Get(type);
    00718
    00719       /* Call callback 'disable autosloping for objects'. */
    00720       if (HasBit(spec->callback_mask, CBM_OBJ_AUTOSLOPE)) {
    00721         /* If the callback fails, allow autoslope. */
    00722         uint16 res = GetObjectCallback(CBID_OBJECT_AUTOSLOPE, 0, 0, spec, Object::GetByTile(tile), tile);
    00723         if ((res == 0) || (res == CALLBACK_FAILED)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00724       } else if (spec->enabled) {
    00725         /* allow autoslope */
    00726         return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00727       }
    00728     }
    00729   }
    00730
    00731   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00732 }
    00733
    00734 extern const TileTypeProcs _tile_type_object_procs = {
    00735   DrawTile_Object,             // draw_tile_proc
    00736   GetSlopeZ_Object,            // get_slope_z_proc
    00737   ClearTile_Object,            // clear_tile_proc
    00738   AddAcceptedCargo_Object,     // add_accepted_cargo_proc
    00739   GetTileDesc_Object,          // get_tile_desc_proc
    00740   GetTileTrackStatus_Object,   // get_tile_track_status_proc
    00741   ClickTile_Object,            // click_tile_proc
    00742   AnimateTile_Object,          // animate_tile_proc
    00743   TileLoop_Object,             // tile_loop_clear
    00744   ChangeTileOwner_Object,      // change_tile_owner_clear
    00745   NULL,                        // add_produced_cargo_proc
    00746   NULL,                        // vehicle_enter_tile_proc
    00747   GetFoundation_Object,        // get_foundation_proc
    00748   TerraformTile_Object,        // terraform_tile_proc
    00749 };