# object_cmd.cpp

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    00001 /* $Id: object_cmd.cpp 23051 2011-10-22 20:45:19Z 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. At this time we can't actually execute the
    00209      * the CLEAR_TILE commands since the newgrf callback later on can check
    00210      * some information about the tiles. */
    00211     bool allow_water = (spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0;
    00212     bool allow_ground = (spec->flags & OBJECT_FLAG_NOT_ON_LAND) == 0;
    00213     TILE_AREA_LOOP(t, ta) {
    00214       if (HasTileWaterGround(t)) {
    00215         if (!allow_water) return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
    00216         if (!IsWaterTile(t)) {
    00217           /* Normal water tiles don't have to be cleared. For all other tile types clear
    00218            * the tile but leave the water. */
    00219           cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_NO_WATER & ~DC_EXEC, CMD_LANDSCAPE_CLEAR));
    00220         } else {
    00221           /* Can't build on water owned by another company. */
    00222           Owner o = GetTileOwner(t);
    00223           if (o != OWNER_NONE && o != OWNER_WATER) cost.AddCost(CheckOwnership(o, t));
    00224         }
    00225       } else {
    00226         if (!allow_ground) return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
    00227         /* For non-water tiles, we'll have to clear it before building. */
    00228         cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR));
    00229       }
    00230     }
    00231
    00232     /* So, now the surface is checked... check the slope of said surface. */
    00233     int allowed_z;
    00234     if (GetTileSlope(tile, (uint*)&allowed_z) != SLOPE_FLAT) allowed_z += TILE_HEIGHT;
    00235
    00236     TILE_AREA_LOOP(t, ta) {
    00237       uint16 callback = CALLBACK_FAILED;
    00238       if (HasBit(spec->callback_mask, CBM_OBJ_SLOPE_CHECK)) {
    00239         TileIndex diff = t - tile;
    00240         callback = GetObjectCallback(CBID_OBJECT_LAND_SLOPE_CHECK, GetTileSlope(t, NULL), TileY(diff) << 4 | TileX(diff), spec, NULL, t, view);
    00241       }
    00242
    00243       if (callback == CALLBACK_FAILED) {
    00244         cost.AddCost(CheckBuildableTile(t, 0, allowed_z, false));
    00245       } else if (callback != 0) {
    00246         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
    00247       }
    00248     }
    00249
    00250     if (flags & DC_EXEC) {
    00251       /* This is basically a copy of the loop above with the exception that we now
    00252        * execute the commands and don't check for errors, since that's already done. */
    00253       TILE_AREA_LOOP(t, ta) {
    00254         if (HasTileWaterGround(t)) {
    00255           if (!IsWaterTile(t)) {
    00256             DoCommand(t, 0, 0, (flags & ~DC_NO_WATER) | DC_NO_MODIFY_TOWN_RATING, CMD_LANDSCAPE_CLEAR);
    00257           }
    00258         } else {
    00259           DoCommand(t, 0, 0, flags | DC_NO_MODIFY_TOWN_RATING, CMD_LANDSCAPE_CLEAR);
    00260         }
    00261       }
    00262     }
    00263   }
    00264   if (cost.Failed()) return cost;
    00265
    00266   /* Finally do a check for bridges. */
    00267   TILE_AREA_LOOP(t, ta) {
    00268     if (MayHaveBridgeAbove(t) && IsBridgeAbove(t) && (
    00269         !(spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) ||
    00270         (GetTileMaxZ(t) + spec->height * TILE_HEIGHT >= GetBridgeHeight(GetSouthernBridgeEnd(t))))) {
    00271       return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    00272     }
    00273   }
    00274
    00275   int hq_score = 0;
    00276   switch (type) {
    00277     case OBJECT_TRANSMITTER:
    00278     case OBJECT_LIGHTHOUSE:
    00279       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00280       break;
    00281
    00282     case OBJECT_OWNED_LAND:
    00283       if (IsTileType(tile, MP_OBJECT) &&
    00284           IsTileOwner(tile, _current_company) &&
    00285           IsOwnedLand(tile)) {
    00286         return_cmd_error(STR_ERROR_YOU_ALREADY_OWN_IT);
    00287       }
    00288       break;
    00289
    00290     case OBJECT_HQ: {
    00291       Company *c = Company::Get(_current_company);
    00292       if (c->location_of_HQ != INVALID_TILE) {
    00293         /* We need to persuade a bit harder to remove the old HQ. */
    00294         _current_company = OWNER_WATER;
    00295         cost.AddCost(ClearTile_Object(c->location_of_HQ, flags));
    00296         _current_company = c->index;
    00297       }
    00298
    00299       if (flags & DC_EXEC) {
    00300         hq_score = UpdateCompanyRatingAndValue(c, false);
    00301         c->location_of_HQ = tile;
    00302         SetWindowDirty(WC_COMPANY, c->index);
    00303       }
    00304       break;
    00305     }
    00306
    00307     case OBJECT_STATUE:
    00308       /* This may never be constructed using this method. */
    00309       return CMD_ERROR;
    00310
    00311     default: // i.e. NewGRF provided.
    00312       break;
    00313   }
    00314
    00315   if (flags & DC_EXEC) {
    00316     BuildObject(type, tile, _current_company, NULL, view);
    00317
    00318     /* Make sure the HQ starts at the right size. */
    00319     if (type == OBJECT_HQ) UpdateCompanyHQ(tile, hq_score);
    00320   }
    00321
    00322   cost.AddCost(ObjectSpec::Get(type)->GetBuildCost() * size_x * size_y);
    00323   return cost;
    00324 }
    00325
    00326
    00327 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh);
    00328
    00329 static void DrawTile_Object(TileInfo *ti)
    00330 {
    00331   ObjectType type = GetObjectType(ti->tile);
    00332   const ObjectSpec *spec = ObjectSpec::Get(type);
    00333
    00334   /* Fall back for when the object doesn't exist anymore. */
    00335   if (!spec->enabled) type = OBJECT_TRANSMITTER;
    00336
    00337   if ((spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) == 0) DrawFoundation(ti, GetFoundation_Object(ti->tile, ti->tileh));
    00338
    00339   if (type < NEW_OBJECT_OFFSET) {
    00340     const DrawTileSprites *dts = NULL;
    00341     Owner to = GetTileOwner(ti->tile);
    00342     PaletteID palette = to == OWNER_NONE ? PAL_NONE : COMPANY_SPRITE_COLOUR(to);
    00343
    00344     if (type == OBJECT_HQ) {
    00345       TileIndex diff = ti->tile - Object::GetByTile(ti->tile)->location.tile;
    00346       dts = &_object_hq[GetCompanyHQSize(ti->tile) << 2 | TileY(diff) << 1 | TileX(diff)];
    00347     } else {
    00348       dts = &_objects[type];
    00349     }
    00350
    00351     if (spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) {
    00352       /* If an object has no foundation, but tries to draw a (flat) ground
    00353        * type... we have to be nice and convert that for them. */
    00354       switch (dts->ground.sprite) {
    00355         case SPR_FLAT_BARE_LAND:          DrawClearLandTile(ti, 0); break;
    00356         case SPR_FLAT_1_THIRD_GRASS_TILE: DrawClearLandTile(ti, 1); break;
    00357         case SPR_FLAT_2_THIRD_GRASS_TILE: DrawClearLandTile(ti, 2); break;
    00358         case SPR_FLAT_GRASS_TILE:         DrawClearLandTile(ti, 3); break;
    00359         default: DrawGroundSprite(dts->ground.sprite, palette);     break;
    00360       }
    00361     } else {
    00362       DrawGroundSprite(dts->ground.sprite, palette);
    00363     }
    00364
    00365     if (!IsInvisibilitySet(TO_STRUCTURES)) {
    00366       const DrawTileSeqStruct *dtss;
    00367       foreach_draw_tile_seq(dtss, dts->seq) {
    00368         AddSortableSpriteToDraw(
    00369           dtss->image.sprite, palette,
    00370           ti->x + dtss->delta_x, ti->y + dtss->delta_y,
    00371           dtss->size_x, dtss->size_y,
    00372           dtss->size_z, ti->z + dtss->delta_z,
    00373           IsTransparencySet(TO_STRUCTURES)
    00374         );
    00375       }
    00376     }
    00377   } else {
    00378     DrawNewObjectTile(ti, spec);
    00379   }
    00380
    00381   if (spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) DrawBridgeMiddle(ti);
    00382 }
    00383
    00384 static uint GetSlopeZ_Object(TileIndex tile, uint x, uint y)
    00385 {
    00386   if (IsOwnedLand(tile)) {
    00387     uint z;
    00388     Slope tileh = GetTileSlope(tile, &z);
    00389
    00390     return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
    00391   } else {
    00392     return GetTileMaxZ(tile);
    00393   }
    00394 }
    00395
    00396 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh)
    00397 {
    00398   return IsOwnedLand(tile) ? FOUNDATION_NONE : FlatteningFoundation(tileh);
    00399 }
    00400
    00405 static void ReallyClearObjectTile(Object *o)
    00406 {
    00407   Object::DecTypeCount(GetObjectType(o->location.tile));
    00408   TILE_AREA_LOOP(tile_cur, o->location) {
    00409     DeleteNewGRFInspectWindow(GSF_OBJECTS, tile_cur);
    00410
    00411     MakeWaterKeepingClass(tile_cur, GetTileOwner(tile_cur));
    00412   }
    00413   delete o;
    00414 }
    00415
    00416 SmallVector<ClearedObjectArea, 4> _cleared_object_areas;
    00417
    00423 ClearedObjectArea *FindClearedObject(TileIndex tile)
    00424 {
    00425   TileArea ta = TileArea(tile, 1, 1);
    00426
    00427   const ClearedObjectArea *end = _cleared_object_areas.End();
    00428   for (ClearedObjectArea *coa = _cleared_object_areas.Begin(); coa != end; coa++) {
    00429     if (coa->area.Intersects(ta)) return coa;
    00430   }
    00431
    00432   return NULL;
    00433 }
    00434
    00435 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags)
    00436 {
    00437   ObjectType type = GetObjectType(tile);
    00438   const ObjectSpec *spec = ObjectSpec::Get(type);
    00439
    00440   /* Get to the northern most tile. */
    00441   Object *o = Object::GetByTile(tile);
    00442   TileArea ta = o->location;
    00443
    00444   CommandCost cost(EXPENSES_CONSTRUCTION, spec->GetClearCost() * ta.w * ta.h / 5);
    00445   if (spec->flags & OBJECT_FLAG_CLEAR_INCOME) cost.MultiplyCost(-1); // They get an income!
    00446
    00447   /* Water can remove everything! */
    00448   if (_current_company != OWNER_WATER) {
    00449     if ((flags & DC_NO_WATER) && IsTileOnWater(tile)) {
    00450       /* There is water under the object, treat it as water tile. */
    00451       return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
    00452     } else if (!(spec->flags & OBJECT_FLAG_AUTOREMOVE) && (flags & DC_AUTO)) {
    00453       /* No automatic removal by overbuilding stuff. */
    00454       return_cmd_error(type == OBJECT_HQ ? STR_ERROR_COMPANY_HEADQUARTERS_IN : STR_ERROR_OBJECT_IN_THE_WAY);
    00455     } else if (_game_mode == GM_EDITOR) {
    00456       /* No further limitations for the editor. */
    00457     } else if (GetTileOwner(tile) == OWNER_NONE) {
    00458       /* Owned by nobody, so we can only remove it with brute force! */
    00459       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
    00460     } else if (CheckTileOwnership(tile).Failed()) {
    00461       /* We don't own it!. */
    00462       return_cmd_error(STR_ERROR_OWNED_BY);
    00463     } else if ((spec->flags & OBJECT_FLAG_CANNOT_REMOVE) != 0 && (spec->flags & OBJECT_FLAG_AUTOREMOVE) == 0) {
    00464       /* In the game editor or with cheats we can remove, otherwise we can't. */
    00465       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
    00466
    00467       /* Removing with the cheat costs more in TTDPatch / the specs. */
    00468       cost.MultiplyCost(25);
    00469     }
    00470   } else if ((spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0) {
    00471     /* Water can't remove objects that are buildable on water. */
    00472     return CMD_ERROR;
    00473   }
    00474
    00475   switch (type) {
    00476     case OBJECT_HQ: {
    00477       Company *c = Company::Get(GetTileOwner(tile));
    00478       if (flags & DC_EXEC) {
    00479         c->location_of_HQ = INVALID_TILE; // reset HQ position
    00480         SetWindowDirty(WC_COMPANY, c->index);
    00481         CargoPacket::InvalidateAllFrom(ST_HEADQUARTERS, c->index);
    00482       }
    00483
    00484       /* cost of relocating company is 1% of company value */
    00485       cost = CommandCost(EXPENSES_PROPERTY, CalculateCompanyValue(c) / 100);
    00486       break;
    00487     }
    00488
    00489     case OBJECT_STATUE:
    00490       if (flags & DC_EXEC) {
    00491         Town *town = o->town;
    00492         ClrBit(town->statues, GetTileOwner(tile));
    00493         SetWindowDirty(WC_TOWN_AUTHORITY, town->index);
    00494       }
    00495       break;
    00496
    00497     default:
    00498       break;
    00499   }
    00500
    00501   ClearedObjectArea *cleared_area = _cleared_object_areas.Append();
    00502   cleared_area->first_tile = tile;
    00503   cleared_area->area = ta;
    00504
    00505   if (flags & DC_EXEC) ReallyClearObjectTile(o);
    00506
    00507   return cost;
    00508 }
    00509
    00510 static void AddAcceptedCargo_Object(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted)
    00511 {
    00512   if (!IsCompanyHQ(tile)) return;
    00513
    00514   /* HQ accepts passenger and mail; but we have to divide the values
    00515    * between 4 tiles it occupies! */
    00516
    00517   /* HQ level (depends on company performance) in the range 1..5. */
    00518   uint level = GetCompanyHQSize(tile) + 1;
    00519
    00520   /* Top town building generates 10, so to make HQ interesting, the top
    00521    * type makes 20. */
    00522   acceptance[CT_PASSENGERS] += max(1U, level);
    00523   SetBit(*always_accepted, CT_PASSENGERS);
    00524
    00525   /* Top town building generates 4, HQ can make up to 8. The
    00526    * proportion passengers:mail is different because such a huge
    00527    * commercial building generates unusually high amount of mail
    00528    * correspondence per physical visitor. */
    00529   acceptance[CT_MAIL] += max(1U, level / 2);
    00530   SetBit(*always_accepted, CT_MAIL);
    00531 }
    00532
    00533
    00534 static void GetTileDesc_Object(TileIndex tile, TileDesc *td)
    00535 {
    00536   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
    00537   td->str = spec->name;
    00538   td->owner[0] = GetTileOwner(tile);
    00539   td->build_date = Object::GetByTile(tile)->build_date;
    00540
    00541   if (spec->grf_prop.grffile != NULL) {
    00542     td->grf = GetGRFConfig(spec->grf_prop.grffile->grfid)->GetName();
    00543   }
    00544 }
    00545
    00546 static void TileLoop_Object(TileIndex tile)
    00547 {
    00548   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
    00549   if (spec->flags & OBJECT_FLAG_ANIMATION) {
    00550     const Object *o = Object::GetByTile(tile);
    00551     TriggerObjectTileAnimation(o, tile, OAT_TILELOOP, spec);
    00552     if (o->location.tile == tile) TriggerObjectAnimation(o, OAT_256_TICKS, spec);
    00553   }
    00554
    00555   if (IsTileOnWater(tile)) TileLoop_Water(tile);
    00556
    00557   if (!IsCompanyHQ(tile)) return;
    00558
    00559   /* HQ accepts passenger and mail; but we have to divide the values
    00560    * between 4 tiles it occupies! */
    00561
    00562   /* HQ level (depends on company performance) in the range 1..5. */
    00563   uint level = GetCompanyHQSize(tile) + 1;
    00564   assert(level < 6);
    00565
    00566   StationFinder stations(TileArea(tile, 2, 2));
    00567
    00568   uint r = Random();
    00569   /* Top town buildings generate 250, so the top HQ type makes 256. */
    00570   if (GB(r, 0, 8) < (256 / 4 / (6 - level))) {
    00571     uint amt = GB(r, 0, 8) / 8 / 4 + 1;
    00572     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
    00573     MoveGoodsToStation(CT_PASSENGERS, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
    00574   }
    00575
    00576   /* Top town building generates 90, HQ can make up to 196. The
    00577    * proportion passengers:mail is about the same as in the acceptance
    00578    * equations. */
    00579   if (GB(r, 8, 8) < (196 / 4 / (6 - level))) {
    00580     uint amt = GB(r, 8, 8) / 8 / 4 + 1;
    00581     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
    00582     MoveGoodsToStation(CT_MAIL, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
    00583   }
    00584 }
    00585
    00586
    00587 static TrackStatus GetTileTrackStatus_Object(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
    00588 {
    00589   return 0;
    00590 }
    00591
    00592 static bool ClickTile_Object(TileIndex tile)
    00593 {
    00594   if (!IsCompanyHQ(tile)) return false;
    00595
    00596   ShowCompany(GetTileOwner(tile));
    00597   return true;
    00598 }
    00599
    00600 static void AnimateTile_Object(TileIndex tile)
    00601 {
    00602   AnimateNewObjectTile(tile);
    00603 }
    00604
    00611 static bool HasTransmitter(TileIndex tile, void *user)
    00612 {
    00613   return IsTransmitterTile(tile);
    00614 }
    00615
    00616 void GenerateObjects()
    00617 {
    00618   if (_settings_game.game_creation.landscape == LT_TOYLAND) return;
    00619
    00620   /* add radio tower */
    00621   int radiotower_to_build = ScaleByMapSize(15); // maximum number of radio towers on the map
    00622   int lighthouses_to_build = _settings_game.game_creation.landscape == LT_TROPIC ? 0 : ScaleByMapSize1D((Random() & 3) + 7);
    00623
    00624   /* Scale the amount of lighthouses with the amount of land at the borders. */
    00625   if (_settings_game.construction.freeform_edges && lighthouses_to_build != 0) {
    00626     uint num_water_tiles = 0;
    00627     for (uint x = 0; x < MapMaxX(); x++) {
    00628       if (IsTileType(TileXY(x, 1), MP_WATER)) num_water_tiles++;
    00629       if (IsTileType(TileXY(x, MapMaxY() - 1), MP_WATER)) num_water_tiles++;
    00630     }
    00631     for (uint y = 1; y < MapMaxY() - 1; y++) {
    00632       if (IsTileType(TileXY(1, y), MP_WATER)) num_water_tiles++;
    00633       if (IsTileType(TileXY(MapMaxX() - 1, y), MP_WATER)) num_water_tiles++;
    00634     }
    00635     /* The -6 is because the top borders are MP_VOID (-2) and all corners
    00636      * are counted twice (-4). */
    00637     lighthouses_to_build = lighthouses_to_build * num_water_tiles / (2 * MapMaxY() + 2 * MapMaxX() - 6);
    00638   }
    00639
    00640   SetGeneratingWorldProgress(GWP_OBJECT, radiotower_to_build + lighthouses_to_build);
    00641
    00642   for (uint i = ScaleByMapSize(1000); i != 0 && Object::CanAllocateItem(); i--) {
    00643     TileIndex tile = RandomTile();
    00644
    00645     uint h;
    00646     if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h >= TILE_HEIGHT * 4 && !IsBridgeAbove(tile)) {
    00647       TileIndex t = tile;
    00648       if (CircularTileSearch(&t, 9, HasTransmitter, NULL)) continue;
    00649
    00650       BuildObject(OBJECT_TRANSMITTER, tile);
    00651       IncreaseGeneratingWorldProgress(GWP_OBJECT);
    00652       if (--radiotower_to_build == 0) break;
    00653     }
    00654   }
    00655
    00656   /* add lighthouses */
    00657   uint maxx = MapMaxX();
    00658   uint maxy = MapMaxY();
    00659   for (int loop_count = 0; loop_count < 1000 && lighthouses_to_build != 0 && Object::CanAllocateItem(); loop_count++) {
    00660     uint r = Random();
    00661
    00662     /* Scatter the lighthouses more evenly around the perimeter */
    00663     int perimeter = (GB(r, 16, 16) % (2 * (maxx + maxy))) - maxy;
    00664     DiagDirection dir;
    00665     for (dir = DIAGDIR_NE; perimeter > 0; dir++) {
    00666       perimeter -= (DiagDirToAxis(dir) == AXIS_X) ? maxx : maxy;
    00667     }
    00668
    00669     TileIndex tile;
    00670     switch (dir) {
    00671       default:
    00672       case DIAGDIR_NE: tile = TileXY(maxx - 1, r % maxy); break;
    00673       case DIAGDIR_SE: tile = TileXY(r % maxx, 1); break;
    00674       case DIAGDIR_SW: tile = TileXY(1,        r % maxy); break;
    00675       case DIAGDIR_NW: tile = TileXY(r % maxx, maxy - 1); break;
    00676     }
    00677
    00678     /* Only build lighthouses at tiles where the border is sea. */
    00679     if (!IsTileType(tile, MP_WATER)) continue;
    00680
    00681     for (int j = 0; j < 19; j++) {
    00682       uint h;
    00683       if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h <= TILE_HEIGHT * 2 && !IsBridgeAbove(tile)) {
    00684         BuildObject(OBJECT_LIGHTHOUSE, tile);
    00685         IncreaseGeneratingWorldProgress(GWP_OBJECT);
    00686         lighthouses_to_build--;
    00687         assert(tile < MapSize());
    00688         break;
    00689       }
    00690       tile = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDiagDir(dir));
    00691       if (tile == INVALID_TILE) break;
    00692     }
    00693   }
    00694 }
    00695
    00696 static void ChangeTileOwner_Object(TileIndex tile, Owner old_owner, Owner new_owner)
    00697 {
    00698   if (!IsTileOwner(tile, old_owner)) return;
    00699
    00700   if (IsOwnedLand(tile) && new_owner != INVALID_OWNER) {
    00701     SetTileOwner(tile, new_owner);
    00702   } else if (IsStatueTile(tile)) {
    00703     Town *t = Object::GetByTile(tile)->town;
    00704     ClrBit(t->statues, old_owner);
    00705     if (new_owner != INVALID_OWNER && !HasBit(t->statues, new_owner)) {
    00706       /* Transfer ownership to the new company */
    00707       SetBit(t->statues, new_owner);
    00708       SetTileOwner(tile, new_owner);
    00709     } else {
    00710       ReallyClearObjectTile(Object::GetByTile(tile));
    00711     }
    00712
    00713     SetWindowDirty(WC_TOWN_AUTHORITY, t->index);
    00714   } else {
    00715     ReallyClearObjectTile(Object::GetByTile(tile));
    00716   }
    00717 }
    00718
    00719 static CommandCost TerraformTile_Object(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
    00720 {
    00721   ObjectType type = GetObjectType(tile);
    00722
    00723   if (type == OBJECT_OWNED_LAND) {
    00724     /* Owned land remains unsold */
    00725     CommandCost ret = CheckTileOwnership(tile);
    00726     if (ret.Succeeded()) return CommandCost();
    00727   } else if (AutoslopeEnabled() && type != OBJECT_TRANSMITTER && type != OBJECT_LIGHTHOUSE) {
    00728     /* Behaviour:
    00729      *  - Both new and old slope must not be steep.
    00730      *  - TileMaxZ must not be changed.
    00731      *  - Allow autoslope by default.
    00732      *  - Disallow autoslope if callback succeeds and returns non-zero.
    00733      */
    00734     Slope tileh_old = GetTileSlope(tile, NULL);
    00735     /* TileMaxZ must not be changed. Slopes must not be steep. */
    00736     if (!IsSteepSlope(tileh_old) && !IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
    00737       const ObjectSpec *spec = ObjectSpec::Get(type);
    00738
    00739       /* Call callback 'disable autosloping for objects'. */
    00740       if (HasBit(spec->callback_mask, CBM_OBJ_AUTOSLOPE)) {
    00741         /* If the callback fails, allow autoslope. */
    00742         uint16 res = GetObjectCallback(CBID_OBJECT_AUTOSLOPE, 0, 0, spec, Object::GetByTile(tile), tile);
    00743         if ((res == 0) || (res == CALLBACK_FAILED)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00744       } else if (spec->enabled) {
    00745         /* allow autoslope */
    00746         return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    00747       }
    00748     }
    00749   }
    00750
    00751   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00752 }
    00753
    00754 extern const TileTypeProcs _tile_type_object_procs = {
    00755   DrawTile_Object,             // draw_tile_proc
    00756   GetSlopeZ_Object,            // get_slope_z_proc
    00757   ClearTile_Object,            // clear_tile_proc
    00758   AddAcceptedCargo_Object,     // add_accepted_cargo_proc
    00759   GetTileDesc_Object,          // get_tile_desc_proc
    00760   GetTileTrackStatus_Object,   // get_tile_track_status_proc
    00761   ClickTile_Object,            // click_tile_proc
    00762   AnimateTile_Object,          // animate_tile_proc
    00763   TileLoop_Object,             // tile_loop_clear
    00764   ChangeTileOwner_Object,      // change_tile_owner_clear
    00765   NULL,                        // add_produced_cargo_proc
    00766   NULL,                        // vehicle_enter_tile_proc
    00767   GetFoundation_Object,        // get_foundation_proc
    00768   TerraformTile_Object,        // terraform_tile_proc
    00769 };