object_cmd.cpp

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00001 /* $Id: object_cmd.cpp 21846 2011-01-18 23:09:43Z 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 "functions.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.h"
00034 #include "newgrf_config.h"
00035 #include "newgrf_object.h"
00036 #include "date_func.h"
00037 #include "newgrf_debug.h"
00038 
00039 #include "table/strings.h"
00040 #include "table/object_land.h"
00041 
00042 ObjectPool _object_pool("Object");
00043 INSTANTIATE_POOL_METHODS(Object)
00044 uint16 Object::counts[NUM_OBJECTS];
00045 
00051 /* static */ Object *Object::GetByTile(TileIndex tile)
00052 {
00053   return Object::Get(GetObjectIndex(tile));
00054 }
00055 
00057 void InitializeObjects()
00058 {
00059   _object_pool.CleanPool();
00060   Object::ResetTypeCounts();
00061 }
00062 
00073 void BuildObject(ObjectType type, TileIndex tile, CompanyID owner, Town *town, uint8 view)
00074 {
00075   const ObjectSpec *spec = ObjectSpec::Get(type);
00076 
00077   TileArea ta(tile, GB(spec->size, HasBit(view, 0) ? 4 : 0, 4), GB(spec->size, HasBit(view, 0) ? 0 : 4, 4));
00078   Object *o = new Object();
00079   o->location      = ta;
00080   o->town          = town == NULL ? CalcClosestTownFromTile(tile) : town;
00081   o->build_date    = _date;
00082   o->view          = view;
00083 
00084   /* If nothing owns the object, the colour will be random. Otherwise
00085    * get the colour from the company's livery settings. */
00086   if (owner == OWNER_NONE) {
00087     o->colour = Random();
00088   } else {
00089     const Livery *l = Company::Get(owner)->livery;
00090     o->colour = l->colour1 + l->colour2 * 16;
00091   }
00092 
00093   /* If the object wants only one colour, then give it that colour. */
00094   if ((spec->flags & OBJECT_FLAG_2CC_COLOUR) == 0) o->colour &= 0xF;
00095 
00096   if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) {
00097     uint16 res = GetObjectCallback(CBID_OBJECT_COLOUR, o->colour, 0, spec, o, tile);
00098     if (res != CALLBACK_FAILED) o->colour = GB(res, 0, 8);
00099   }
00100 
00101   assert(o->town != NULL);
00102 
00103   TILE_AREA_LOOP(t, ta) {
00104     WaterClass wc = (IsWaterTile(t) ? GetWaterClass(t) : WATER_CLASS_INVALID);
00105     MakeObject(t, type, owner, o->index, wc, Random());
00106     MarkTileDirtyByTile(t);
00107   }
00108 
00109   Object::IncTypeCount(type);
00110   if (spec->flags & OBJECT_FLAG_ANIMATION) TriggerObjectAnimation(o, OAT_BUILT, spec);
00111 }
00112 
00117 static void IncreaseAnimationStage(TileIndex tile)
00118 {
00119   TileArea ta = Object::GetByTile(tile)->location;
00120   TILE_AREA_LOOP(t, ta) {
00121     SetAnimationFrame(t, GetAnimationFrame(t) + 1);
00122     MarkTileDirtyByTile(t);
00123   }
00124 }
00125 
00127 #define GetCompanyHQSize GetAnimationFrame
00128 
00129 #define IncreaseCompanyHQSize IncreaseAnimationStage
00130 
00136 void UpdateCompanyHQ(TileIndex tile, uint score)
00137 {
00138   if (tile == INVALID_TILE) return;
00139 
00140   byte val;
00141   (val = 0, score < 170) ||
00142   (val++, score < 350) ||
00143   (val++, score < 520) ||
00144   (val++, score < 720) ||
00145   (val++, true);
00146 
00147   while (GetCompanyHQSize(tile) < val) {
00148     IncreaseCompanyHQSize(tile);
00149   }
00150 }
00151 
00156 void UpdateObjectColours(const Company *c)
00157 {
00158   Object *obj;
00159   FOR_ALL_OBJECTS(obj) {
00160     Owner owner = GetTileOwner(obj->location.tile);
00161     /* Not the current owner, so colour doesn't change. */
00162     if (owner != c->index) continue;
00163 
00164     const ObjectSpec *spec = ObjectSpec::GetByTile(obj->location.tile);
00165     /* Using the object colour callback, so not using company colour. */
00166     if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) continue;
00167 
00168     const Livery *l = c->livery;
00169     obj->colour = ((spec->flags & OBJECT_FLAG_2CC_COLOUR) ? (l->colour2 * 16) : 0) + l->colour1;
00170   }
00171 }
00172 
00173 extern CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool check_bridge);
00174 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags);
00175 
00185 CommandCost CmdBuildObject(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00186 {
00187   CommandCost cost(EXPENSES_PROPERTY);
00188 
00189   ObjectType type = (ObjectType)GB(p1, 0, 8);
00190   uint8 view = GB(p2, 0, 2);
00191   const ObjectSpec *spec = ObjectSpec::Get(type);
00192   if (!spec->IsAvailable()) return CMD_ERROR;
00193 
00194   if (spec->flags & OBJECT_FLAG_ONLY_IN_SCENEDIT && (_game_mode != GM_EDITOR || _current_company != OWNER_NONE)) return CMD_ERROR;
00195   if (spec->flags & OBJECT_FLAG_ONLY_IN_GAME && (_game_mode != GM_NORMAL || _current_company > MAX_COMPANIES)) return CMD_ERROR;
00196   if (view >= spec->views) return CMD_ERROR;
00197 
00198   if (!Object::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_OBJECTS);
00199   if (Town::GetNumItems() == 0) return_cmd_error(STR_ERROR_MUST_FOUND_TOWN_FIRST);
00200 
00201   int size_x = GB(spec->size, HasBit(view, 0) ? 4 : 0, 4);
00202   int size_y = GB(spec->size, HasBit(view, 0) ? 0 : 4, 4);
00203   TileArea ta(tile, size_x, size_y);
00204 
00205   if (type == OBJECT_OWNED_LAND) {
00206     /* Owned land is special as it can be placed on any slope. */
00207     cost.AddCost(DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
00208   } else {
00209     /* Check the surface to build on. */
00210     bool allow_water = (spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0;
00211     bool allow_ground = (spec->flags & OBJECT_FLAG_NOT_ON_LAND) == 0;
00212     TILE_AREA_LOOP(t, ta) {
00213       if (HasTileWaterGround(t)) {
00214         if (!allow_water) return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00215         if (!IsWaterTile(t)) {
00216           /* Normal water tiles don't have to be cleared. For all other tile types clear
00217            * the tile but leave the water. */
00218           cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_NO_WATER, CMD_LANDSCAPE_CLEAR));
00219         }
00220       } else {
00221         if (!allow_ground) return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
00222         /* For non-water tiles, we'll have to clear it before building. */
00223         cost.AddCost(DoCommand(t, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
00224       }
00225     }
00226 
00227     /* So, now the surface is checked... check the slope of said surface. */
00228     int allowed_z;
00229     if (GetTileSlope(tile, (uint*)&allowed_z) != SLOPE_FLAT) allowed_z += TILE_HEIGHT;
00230 
00231     TILE_AREA_LOOP(t, ta) {
00232       uint16 callback = CALLBACK_FAILED;
00233       if (HasBit(spec->callback_mask, CBM_OBJ_SLOPE_CHECK)) {
00234         TileIndex diff = t - tile;
00235         callback = GetObjectCallback(CBID_OBJECT_LAND_SLOPE_CHECK, GetTileSlope(t, NULL), TileY(diff) << 4 | TileX(diff), spec, NULL, t, view);
00236       }
00237 
00238       if (callback == CALLBACK_FAILED) {
00239         cost.AddCost(CheckBuildableTile(t, 0, allowed_z, false));
00240       } else if (callback != 0) {
00241         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
00242       }
00243     }
00244   }
00245   if (cost.Failed()) return cost;
00246 
00247   /* Finally do a check for bridges. */
00248   TILE_AREA_LOOP(t, ta) {
00249     if (MayHaveBridgeAbove(t) && IsBridgeAbove(t) && (
00250         !(spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) ||
00251         (GetTileMaxZ(t) + spec->height * TILE_HEIGHT >= GetBridgeHeight(GetSouthernBridgeEnd(t))))) {
00252       return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00253     }
00254   }
00255 
00256   int hq_score = 0;
00257   switch (type) {
00258     case OBJECT_TRANSMITTER:
00259     case OBJECT_LIGHTHOUSE:
00260       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00261       break;
00262 
00263     case OBJECT_OWNED_LAND:
00264       if (IsTileType(tile, MP_OBJECT) &&
00265           IsTileOwner(tile, _current_company) &&
00266           IsOwnedLand(tile)) {
00267         return_cmd_error(STR_ERROR_YOU_ALREADY_OWN_IT);
00268       }
00269       break;
00270 
00271     case OBJECT_HQ: {
00272       Company *c = Company::Get(_current_company);
00273       if (c->location_of_HQ != INVALID_TILE) {
00274         /* We need to persuade a bit harder to remove the old HQ. */
00275         _current_company = OWNER_WATER;
00276         cost.AddCost(ClearTile_Object(c->location_of_HQ, flags));
00277         _current_company = c->index;
00278       }
00279 
00280       if (flags & DC_EXEC) {
00281         hq_score = UpdateCompanyRatingAndValue(c, false);
00282         c->location_of_HQ = tile;
00283         SetWindowDirty(WC_COMPANY, c->index);
00284       }
00285       break;
00286     }
00287 
00288     case OBJECT_STATUE:
00289       /* This may never be constructed using this method. */
00290       return CMD_ERROR;
00291 
00292     default: // i.e. NewGRF provided.
00293       break;
00294   }
00295 
00296   if (flags & DC_EXEC) {
00297     BuildObject(type, tile, _current_company, NULL, view);
00298 
00299     /* Make sure the HQ starts at the right size. */
00300     if (type == OBJECT_HQ) UpdateCompanyHQ(tile, hq_score);
00301   }
00302 
00303   cost.AddCost(ObjectSpec::Get(type)->GetBuildCost() * size_x * size_y);
00304   return cost;
00305 }
00306 
00307 
00308 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh);
00309 
00310 static void DrawTile_Object(TileInfo *ti)
00311 {
00312   ObjectType type = GetObjectType(ti->tile);
00313   const ObjectSpec *spec = ObjectSpec::Get(type);
00314 
00315   /* Fall back for when the object doesn't exist anymore. */
00316   if (!spec->enabled) type = OBJECT_TRANSMITTER;
00317 
00318   if ((spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) == 0) DrawFoundation(ti, GetFoundation_Object(ti->tile, ti->tileh));
00319 
00320   if (type < NEW_OBJECT_OFFSET) {
00321     const DrawTileSprites *dts = NULL;
00322     Owner to = GetTileOwner(ti->tile);
00323     PaletteID palette = to == OWNER_NONE ? PAL_NONE : COMPANY_SPRITE_COLOUR(to);
00324 
00325     if (type == OBJECT_HQ) {
00326       TileIndex diff = ti->tile - Object::GetByTile(ti->tile)->location.tile;
00327       dts = &_object_hq[GetCompanyHQSize(ti->tile) << 2 | TileY(diff) << 1 | TileX(diff)];
00328     } else {
00329       dts = &_objects[type];
00330     }
00331 
00332     if (spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) {
00333       /* If an object has no foundation, but tries to draw a (flat) ground
00334        * type... we have to be nice and convert that for them. */
00335       switch (dts->ground.sprite) {
00336         case SPR_FLAT_BARE_LAND:          DrawClearLandTile(ti, 0); break;
00337         case SPR_FLAT_1_THIRD_GRASS_TILE: DrawClearLandTile(ti, 1); break;
00338         case SPR_FLAT_2_THIRD_GRASS_TILE: DrawClearLandTile(ti, 2); break;
00339         case SPR_FLAT_GRASS_TILE:         DrawClearLandTile(ti, 3); break;
00340         default: DrawGroundSprite(dts->ground.sprite, palette);     break;
00341       }
00342     } else {
00343       DrawGroundSprite(dts->ground.sprite, palette);
00344     }
00345 
00346     if (!IsInvisibilitySet(TO_STRUCTURES)) {
00347       const DrawTileSeqStruct *dtss;
00348       foreach_draw_tile_seq(dtss, dts->seq) {
00349         AddSortableSpriteToDraw(
00350           dtss->image.sprite, palette,
00351           ti->x + dtss->delta_x, ti->y + dtss->delta_y,
00352           dtss->size_x, dtss->size_y,
00353           dtss->size_z, ti->z + dtss->delta_z,
00354           IsTransparencySet(TO_STRUCTURES)
00355         );
00356       }
00357     }
00358   } else {
00359     DrawNewObjectTile(ti, spec);
00360   }
00361 
00362   if (spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) DrawBridgeMiddle(ti);
00363 }
00364 
00365 static uint GetSlopeZ_Object(TileIndex tile, uint x, uint y)
00366 {
00367   if (IsOwnedLand(tile)) {
00368     uint z;
00369     Slope tileh = GetTileSlope(tile, &z);
00370 
00371     return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
00372   } else {
00373     return GetTileMaxZ(tile);
00374   }
00375 }
00376 
00377 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh)
00378 {
00379   return IsOwnedLand(tile) ? FOUNDATION_NONE : FlatteningFoundation(tileh);
00380 }
00381 
00386 static void ReallyClearObjectTile(Object *o)
00387 {
00388   Object::DecTypeCount(GetObjectType(o->location.tile));
00389   TILE_AREA_LOOP(tile_cur, o->location) {
00390     DeleteNewGRFInspectWindow(GSF_OBJECTS, tile_cur);
00391 
00392     MakeWaterKeepingClass(tile_cur, GetTileOwner(tile_cur));
00393   }
00394   delete o;
00395 }
00396 
00397 SmallVector<ClearedObjectArea, 4> _cleared_object_areas;
00398 
00404 ClearedObjectArea *FindClearedObject(TileIndex tile)
00405 {
00406   TileArea ta = TileArea(tile, 1, 1);
00407 
00408   const ClearedObjectArea *end = _cleared_object_areas.End();
00409   for (ClearedObjectArea *coa = _cleared_object_areas.Begin(); coa != end; coa++) {
00410     if (coa->area.Intersects(ta)) return coa;
00411   }
00412 
00413   return NULL;
00414 }
00415 
00416 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags)
00417 {
00418   ObjectType type = GetObjectType(tile);
00419   const ObjectSpec *spec = ObjectSpec::Get(type);
00420 
00421   /* Get to the northern most tile. */
00422   Object *o = Object::GetByTile(tile);
00423   TileArea ta = o->location;
00424 
00425   ClearedObjectArea *cleared_area = _cleared_object_areas.Append();
00426   cleared_area->first_tile = tile;
00427   cleared_area->area = ta;
00428 
00429   CommandCost cost(EXPENSES_CONSTRUCTION, spec->GetClearCost() * ta.w * ta.h / 5);
00430   if (spec->flags & OBJECT_FLAG_CLEAR_INCOME) cost.MultiplyCost(-1); // They get an income!
00431 
00432   /* Water can remove everything! */
00433   if (_current_company != OWNER_WATER) {
00434     if ((flags & DC_NO_WATER) && IsTileOnWater(tile)) {
00435       /* There is water under the object, treat it as water tile. */
00436       return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00437     } else if (!(spec->flags & OBJECT_FLAG_AUTOREMOVE) && (flags & DC_AUTO)) {
00438       /* No automatic removal by overbuilding stuff. */
00439       return_cmd_error(type == OBJECT_HQ ? STR_ERROR_COMPANY_HEADQUARTERS_IN : STR_ERROR_OBJECT_IN_THE_WAY);
00440     } else if (_game_mode == GM_EDITOR) {
00441       /* No further limitations for the editor. */
00442     } else if (GetTileOwner(tile) == OWNER_NONE) {
00443       /* Owned by nobody, so we can only remove it with brute force! */
00444       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00445     } else if (CheckTileOwnership(tile).Failed()) {
00446       /* We don't own it!. */
00447       return_cmd_error(STR_ERROR_OWNED_BY);
00448     } else if ((spec->flags & OBJECT_FLAG_CANNOT_REMOVE) != 0 && (spec->flags & OBJECT_FLAG_AUTOREMOVE) == 0) {
00449       /* In the game editor or with cheats we can remove, otherwise we can't. */
00450       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00451 
00452       /* Removing with the cheat costs more in TTDPatch / the specs. */
00453       cost.MultiplyCost(25);
00454     }
00455   } else if ((spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0) {
00456     /* Water can't remove objects that are buildable on water. */
00457     return CMD_ERROR;
00458   }
00459 
00460   switch (type) {
00461     case OBJECT_HQ: {
00462       Company *c = Company::Get(GetTileOwner(tile));
00463       if (flags & DC_EXEC) {
00464         c->location_of_HQ = INVALID_TILE; // reset HQ position
00465         SetWindowDirty(WC_COMPANY, c->index);
00466         CargoPacket::InvalidateAllFrom(ST_HEADQUARTERS, c->index);
00467       }
00468 
00469       /* cost of relocating company is 1% of company value */
00470       cost = CommandCost(EXPENSES_PROPERTY, CalculateCompanyValue(c) / 100);
00471       break;
00472     }
00473 
00474     case OBJECT_STATUE:
00475       if (flags & DC_EXEC) {
00476         Town *town = o->town;
00477         ClrBit(town->statues, GetTileOwner(tile));
00478         SetWindowDirty(WC_TOWN_AUTHORITY, town->index);
00479       }
00480       break;
00481 
00482     default:
00483       break;
00484   }
00485 
00486   if (flags & DC_EXEC) ReallyClearObjectTile(o);
00487 
00488   return cost;
00489 }
00490 
00491 static void AddAcceptedCargo_Object(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted)
00492 {
00493   if (!IsCompanyHQ(tile)) return;
00494 
00495   /* HQ accepts passenger and mail; but we have to divide the values
00496    * between 4 tiles it occupies! */
00497 
00498   /* HQ level (depends on company performance) in the range 1..5. */
00499   uint level = GetCompanyHQSize(tile) + 1;
00500 
00501   /* Top town building generates 10, so to make HQ interesting, the top
00502    * type makes 20. */
00503   acceptance[CT_PASSENGERS] += max(1U, level);
00504   SetBit(*always_accepted, CT_PASSENGERS);
00505 
00506   /* Top town building generates 4, HQ can make up to 8. The
00507    * proportion passengers:mail is different because such a huge
00508    * commercial building generates unusually high amount of mail
00509    * correspondence per physical visitor. */
00510   acceptance[CT_MAIL] += max(1U, level / 2);
00511   SetBit(*always_accepted, CT_MAIL);
00512 }
00513 
00514 
00515 static void GetTileDesc_Object(TileIndex tile, TileDesc *td)
00516 {
00517   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00518   td->str = spec->name;
00519   td->owner[0] = GetTileOwner(tile);
00520   td->build_date = Object::GetByTile(tile)->build_date;
00521 
00522   if (spec->grf_prop.grffile != NULL) {
00523     td->grf = GetGRFConfig(spec->grf_prop.grffile->grfid)->GetName();
00524   }
00525 }
00526 
00527 static void TileLoop_Object(TileIndex tile)
00528 {
00529   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00530   if (spec->flags & OBJECT_FLAG_ANIMATION) {
00531     const Object *o = Object::GetByTile(tile);
00532     TriggerObjectTileAnimation(o, tile, OAT_TILELOOP, spec);
00533     if (o->location.tile == tile) TriggerObjectAnimation(o, OAT_256_TICKS, spec);
00534   }
00535 
00536   if (IsTileOnWater(tile)) TileLoop_Water(tile);
00537 
00538   if (!IsCompanyHQ(tile)) return;
00539 
00540   /* HQ accepts passenger and mail; but we have to divide the values
00541    * between 4 tiles it occupies! */
00542 
00543   /* HQ level (depends on company performance) in the range 1..5. */
00544   uint level = GetCompanyHQSize(tile) + 1;
00545   assert(level < 6);
00546 
00547   StationFinder stations(TileArea(tile, 2, 2));
00548 
00549   uint r = Random();
00550   /* Top town buildings generate 250, so the top HQ type makes 256. */
00551   if (GB(r, 0, 8) < (256 / 4 / (6 - level))) {
00552     uint amt = GB(r, 0, 8) / 8 / 4 + 1;
00553     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00554     MoveGoodsToStation(CT_PASSENGERS, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00555   }
00556 
00557   /* Top town building generates 90, HQ can make up to 196. The
00558    * proportion passengers:mail is about the same as in the acceptance
00559    * equations. */
00560   if (GB(r, 8, 8) < (196 / 4 / (6 - level))) {
00561     uint amt = GB(r, 8, 8) / 8 / 4 + 1;
00562     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00563     MoveGoodsToStation(CT_MAIL, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00564   }
00565 }
00566 
00567 
00568 static TrackStatus GetTileTrackStatus_Object(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
00569 {
00570   return 0;
00571 }
00572 
00573 static bool ClickTile_Object(TileIndex tile)
00574 {
00575   if (!IsCompanyHQ(tile)) return false;
00576 
00577   ShowCompany(GetTileOwner(tile));
00578   return true;
00579 }
00580 
00581 static void AnimateTile_Object(TileIndex tile)
00582 {
00583   AnimateNewObjectTile(tile);
00584 }
00585 
00592 static bool HasTransmitter(TileIndex tile, void *user)
00593 {
00594   return IsTransmitterTile(tile);
00595 }
00596 
00597 void GenerateObjects()
00598 {
00599   if (_settings_game.game_creation.landscape == LT_TOYLAND) return;
00600 
00601   /* add radio tower */
00602   int radiotower_to_build = ScaleByMapSize(15); // maximum number of radio towers on the map
00603   int lighthouses_to_build = _settings_game.game_creation.landscape == LT_TROPIC ? 0 : ScaleByMapSize1D((Random() & 3) + 7);
00604 
00605   /* Scale the amount of lighthouses with the amount of land at the borders. */
00606   if (_settings_game.construction.freeform_edges && lighthouses_to_build != 0) {
00607     uint num_water_tiles = 0;
00608     for (uint x = 0; x < MapMaxX(); x++) {
00609       if (IsTileType(TileXY(x, 1), MP_WATER)) num_water_tiles++;
00610       if (IsTileType(TileXY(x, MapMaxY() - 1), MP_WATER)) num_water_tiles++;
00611     }
00612     for (uint y = 1; y < MapMaxY() - 1; y++) {
00613       if (IsTileType(TileXY(1, y), MP_WATER)) num_water_tiles++;
00614       if (IsTileType(TileXY(MapMaxX() - 1, y), MP_WATER)) num_water_tiles++;
00615     }
00616     /* The -6 is because the top borders are MP_VOID (-2) and all corners
00617      * are counted twice (-4). */
00618     lighthouses_to_build = lighthouses_to_build * num_water_tiles / (2 * MapMaxY() + 2 * MapMaxX() - 6);
00619   }
00620 
00621   SetGeneratingWorldProgress(GWP_OBJECT, radiotower_to_build + lighthouses_to_build);
00622 
00623   for (uint i = ScaleByMapSize(1000); i != 0; i--) {
00624     TileIndex tile = RandomTile();
00625 
00626     uint h;
00627     if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h >= TILE_HEIGHT * 4 && !IsBridgeAbove(tile)) {
00628       TileIndex t = tile;
00629       if (CircularTileSearch(&t, 9, HasTransmitter, NULL)) continue;
00630 
00631       BuildObject(OBJECT_TRANSMITTER, tile);
00632       IncreaseGeneratingWorldProgress(GWP_OBJECT);
00633       if (--radiotower_to_build == 0) break;
00634     }
00635   }
00636 
00637   /* add lighthouses */
00638   uint maxx = MapMaxX();
00639   uint maxy = MapMaxY();
00640   for (int loop_count = 0; loop_count < 1000 && lighthouses_to_build != 0; loop_count++) {
00641     uint r = Random();
00642 
00643     /* Scatter the lighthouses more evenly around the perimeter */
00644     int perimeter = (GB(r, 16, 16) % (2 * (maxx + maxy))) - maxy;
00645     DiagDirection dir;
00646     for (dir = DIAGDIR_NE; perimeter > 0; dir++) {
00647       perimeter -= (DiagDirToAxis(dir) == AXIS_X) ? maxx : maxy;
00648     }
00649 
00650     TileIndex tile;
00651     switch (dir) {
00652       default:
00653       case DIAGDIR_NE: tile = TileXY(maxx - 1, r % maxy); break;
00654       case DIAGDIR_SE: tile = TileXY(r % maxx, 1); break;
00655       case DIAGDIR_SW: tile = TileXY(1,        r % maxy); break;
00656       case DIAGDIR_NW: tile = TileXY(r % maxx, maxy - 1); break;
00657     }
00658 
00659     /* Only build lighthouses at tiles where the border is sea. */
00660     if (!IsTileType(tile, MP_WATER)) continue;
00661 
00662     for (int j = 0; j < 19; j++) {
00663       uint h;
00664       if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h <= TILE_HEIGHT * 2 && !IsBridgeAbove(tile)) {
00665         BuildObject(OBJECT_LIGHTHOUSE, tile);
00666         IncreaseGeneratingWorldProgress(GWP_OBJECT);
00667         lighthouses_to_build--;
00668         assert(tile < MapSize());
00669         break;
00670       }
00671       tile = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDiagDir(dir));
00672       if (tile == INVALID_TILE) break;
00673     }
00674   }
00675 }
00676 
00677 static void ChangeTileOwner_Object(TileIndex tile, Owner old_owner, Owner new_owner)
00678 {
00679   if (!IsTileOwner(tile, old_owner)) return;
00680 
00681   if (IsOwnedLand(tile) && new_owner != INVALID_OWNER) {
00682     SetTileOwner(tile, new_owner);
00683   } else if (IsStatueTile(tile)) {
00684     Town *t = Object::GetByTile(tile)->town;
00685     ClrBit(t->statues, old_owner);
00686     if (new_owner != INVALID_OWNER && !HasBit(t->statues, new_owner)) {
00687       /* Transfer ownership to the new company */
00688       SetBit(t->statues, new_owner);
00689       SetTileOwner(tile, new_owner);
00690     } else {
00691       ReallyClearObjectTile(Object::GetByTile(tile));
00692     }
00693 
00694     SetWindowDirty(WC_TOWN_AUTHORITY, t->index);
00695   } else {
00696     ReallyClearObjectTile(Object::GetByTile(tile));
00697   }
00698 }
00699 
00700 static CommandCost TerraformTile_Object(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
00701 {
00702   ObjectType type = GetObjectType(tile);
00703 
00704   if (type == OBJECT_OWNED_LAND) {
00705     /* Owned land remains unsold */
00706     CommandCost ret = CheckTileOwnership(tile);
00707     if (ret.Succeeded()) return CommandCost();
00708   } else if (AutoslopeEnabled() && type != OBJECT_TRANSMITTER && type != OBJECT_LIGHTHOUSE) {
00709     /* Behaviour:
00710      *  - Both new and old slope must not be steep.
00711      *  - TileMaxZ must not be changed.
00712      *  - Allow autoslope by default.
00713      *  - Disallow autoslope if callback succeeds and returns non-zero.
00714      */
00715     Slope tileh_old = GetTileSlope(tile, NULL);
00716     /* TileMaxZ must not be changed. Slopes must not be steep. */
00717     if (!IsSteepSlope(tileh_old) && !IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
00718       const ObjectSpec *spec = ObjectSpec::Get(type);
00719 
00720       /* Call callback 'disable autosloping for objects'. */
00721       if (HasBit(spec->callback_mask, CBM_OBJ_AUTOSLOPE)) {
00722         /* If the callback fails, allow autoslope. */
00723         uint16 res = GetObjectCallback(CBID_OBJECT_AUTOSLOPE, 0, 0, spec, Object::GetByTile(tile), tile);
00724         if ((res == 0) || (res == CALLBACK_FAILED)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00725       } else if (spec->enabled) {
00726         /* allow autoslope */
00727         return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00728       }
00729     }
00730   }
00731 
00732   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00733 }
00734 
00735 extern const TileTypeProcs _tile_type_object_procs = {
00736   DrawTile_Object,             // draw_tile_proc
00737   GetSlopeZ_Object,            // get_slope_z_proc
00738   ClearTile_Object,            // clear_tile_proc
00739   AddAcceptedCargo_Object,     // add_accepted_cargo_proc
00740   GetTileDesc_Object,          // get_tile_desc_proc
00741   GetTileTrackStatus_Object,   // get_tile_track_status_proc
00742   ClickTile_Object,            // click_tile_proc
00743   AnimateTile_Object,          // animate_tile_proc
00744   TileLoop_Object,             // tile_loop_clear
00745   ChangeTileOwner_Object,      // change_tile_owner_clear
00746   NULL,                        // add_produced_cargo_proc
00747   NULL,                        // vehicle_enter_tile_proc
00748   GetFoundation_Object,        // get_foundation_proc
00749   TerraformTile_Object,        // terraform_tile_proc
00750 };

Generated on Thu Jan 20 22:57:37 2011 for OpenTTD by  doxygen 1.6.1