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 "core/random_func.hpp"
00029 #include "core/pool_func.hpp"
00030 #include "object_map.h"
00031 #include "object_base.h"
00032 #include "newgrf_config.h"
00033 #include "newgrf_object.h"
00034 #include "date_func.h"
00035 #include "newgrf_debug.h"
00036 #include "vehicle_func.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           /* However, the tile has to be clear of vehicles. */
00233           cost.AddCost(EnsureNoVehicleOnGround(t));
00234         }
00235       } else {
00236         if (!allow_ground) return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
00237         /* For non-water tiles, we'll have to clear it before building. */
00238         cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR));
00239       }
00240     }
00241 
00242     /* So, now the surface is checked... check the slope of said surface. */
00243     int allowed_z;
00244     if (GetTileSlope(tile, &allowed_z) != SLOPE_FLAT) allowed_z++;
00245 
00246     TILE_AREA_LOOP(t, ta) {
00247       uint16 callback = CALLBACK_FAILED;
00248       if (HasBit(spec->callback_mask, CBM_OBJ_SLOPE_CHECK)) {
00249         TileIndex diff = t - tile;
00250         callback = GetObjectCallback(CBID_OBJECT_LAND_SLOPE_CHECK, GetTileSlope(t), TileY(diff) << 4 | TileX(diff), spec, NULL, t, view);
00251       }
00252 
00253       if (callback == CALLBACK_FAILED) {
00254         cost.AddCost(CheckBuildableTile(t, 0, allowed_z, false, false));
00255       } else {
00256         /* The meaning of bit 10 is inverted for a grf version < 8. */
00257         if (spec->grf_prop.grffile->grf_version < 8) ToggleBit(callback, 10);
00258         CommandCost ret = GetErrorMessageFromLocationCallbackResult(callback, spec->grf_prop.grffile->grfid, STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
00259         if (ret.Failed()) return ret;
00260       }
00261     }
00262 
00263     if (flags & DC_EXEC) {
00264       /* This is basically a copy of the loop above with the exception that we now
00265        * execute the commands and don't check for errors, since that's already done. */
00266       TILE_AREA_LOOP(t, ta) {
00267         if (HasTileWaterGround(t)) {
00268           if (!IsWaterTile(t)) {
00269             DoCommand(t, 0, 0, (flags & ~DC_NO_WATER) | DC_NO_MODIFY_TOWN_RATING, CMD_LANDSCAPE_CLEAR);
00270           }
00271         } else {
00272           DoCommand(t, 0, 0, flags | DC_NO_MODIFY_TOWN_RATING, CMD_LANDSCAPE_CLEAR);
00273         }
00274       }
00275     }
00276   }
00277   if (cost.Failed()) return cost;
00278 
00279   /* Finally do a check for bridges. */
00280   TILE_AREA_LOOP(t, ta) {
00281     if (MayHaveBridgeAbove(t) && IsBridgeAbove(t) && (
00282         !(spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) ||
00283         (GetTileMaxZ(t) + spec->height >= GetBridgeHeight(GetSouthernBridgeEnd(t))))) {
00284       return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00285     }
00286   }
00287 
00288   int hq_score = 0;
00289   switch (type) {
00290     case OBJECT_TRANSMITTER:
00291     case OBJECT_LIGHTHOUSE:
00292       if (GetTileSlope(tile) != SLOPE_FLAT) return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00293       break;
00294 
00295     case OBJECT_OWNED_LAND:
00296       if (IsTileType(tile, MP_OBJECT) &&
00297           IsTileOwner(tile, _current_company) &&
00298           IsOwnedLand(tile)) {
00299         return_cmd_error(STR_ERROR_YOU_ALREADY_OWN_IT);
00300       }
00301       break;
00302 
00303     case OBJECT_HQ: {
00304       Company *c = Company::Get(_current_company);
00305       if (c->location_of_HQ != INVALID_TILE) {
00306         /* We need to persuade a bit harder to remove the old HQ. */
00307         _current_company = OWNER_WATER;
00308         cost.AddCost(ClearTile_Object(c->location_of_HQ, flags));
00309         _current_company = c->index;
00310       }
00311 
00312       if (flags & DC_EXEC) {
00313         hq_score = UpdateCompanyRatingAndValue(c, false);
00314         c->location_of_HQ = tile;
00315         SetWindowDirty(WC_COMPANY, c->index);
00316       }
00317       break;
00318     }
00319 
00320     case OBJECT_STATUE:
00321       /* This may never be constructed using this method. */
00322       return CMD_ERROR;
00323 
00324     default: // i.e. NewGRF provided.
00325       break;
00326   }
00327 
00328   if (flags & DC_EXEC) {
00329     BuildObject(type, tile, _current_company, NULL, view);
00330 
00331     /* Make sure the HQ starts at the right size. */
00332     if (type == OBJECT_HQ) UpdateCompanyHQ(tile, hq_score);
00333   }
00334 
00335   cost.AddCost(ObjectSpec::Get(type)->GetBuildCost() * size_x * size_y);
00336   return cost;
00337 }
00338 
00339 
00340 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh);
00341 
00342 static void DrawTile_Object(TileInfo *ti)
00343 {
00344   ObjectType type = GetObjectType(ti->tile);
00345   const ObjectSpec *spec = ObjectSpec::Get(type);
00346 
00347   /* Fall back for when the object doesn't exist anymore. */
00348   if (!spec->enabled) type = OBJECT_TRANSMITTER;
00349 
00350   if ((spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) == 0) DrawFoundation(ti, GetFoundation_Object(ti->tile, ti->tileh));
00351 
00352   if (type < NEW_OBJECT_OFFSET) {
00353     const DrawTileSprites *dts = NULL;
00354     Owner to = GetTileOwner(ti->tile);
00355     PaletteID palette = to == OWNER_NONE ? PAL_NONE : COMPANY_SPRITE_COLOUR(to);
00356 
00357     if (type == OBJECT_HQ) {
00358       TileIndex diff = ti->tile - Object::GetByTile(ti->tile)->location.tile;
00359       dts = &_object_hq[GetCompanyHQSize(ti->tile) << 2 | TileY(diff) << 1 | TileX(diff)];
00360     } else {
00361       dts = &_objects[type];
00362     }
00363 
00364     if (spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) {
00365       /* If an object has no foundation, but tries to draw a (flat) ground
00366        * type... we have to be nice and convert that for them. */
00367       switch (dts->ground.sprite) {
00368         case SPR_FLAT_BARE_LAND:          DrawClearLandTile(ti, 0); break;
00369         case SPR_FLAT_1_THIRD_GRASS_TILE: DrawClearLandTile(ti, 1); break;
00370         case SPR_FLAT_2_THIRD_GRASS_TILE: DrawClearLandTile(ti, 2); break;
00371         case SPR_FLAT_GRASS_TILE:         DrawClearLandTile(ti, 3); break;
00372         default: DrawGroundSprite(dts->ground.sprite, palette);     break;
00373       }
00374     } else {
00375       DrawGroundSprite(dts->ground.sprite, palette);
00376     }
00377 
00378     if (!IsInvisibilitySet(TO_STRUCTURES)) {
00379       const DrawTileSeqStruct *dtss;
00380       foreach_draw_tile_seq(dtss, dts->seq) {
00381         AddSortableSpriteToDraw(
00382           dtss->image.sprite, palette,
00383           ti->x + dtss->delta_x, ti->y + dtss->delta_y,
00384           dtss->size_x, dtss->size_y,
00385           dtss->size_z, ti->z + dtss->delta_z,
00386           IsTransparencySet(TO_STRUCTURES)
00387         );
00388       }
00389     }
00390   } else {
00391     DrawNewObjectTile(ti, spec);
00392   }
00393 
00394   if (spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) DrawBridgeMiddle(ti);
00395 }
00396 
00397 static int GetSlopePixelZ_Object(TileIndex tile, uint x, uint y)
00398 {
00399   if (IsOwnedLand(tile)) {
00400     int z;
00401     Slope tileh = GetTilePixelSlope(tile, &z);
00402 
00403     return z + GetPartialPixelZ(x & 0xF, y & 0xF, tileh);
00404   } else {
00405     return GetTileMaxPixelZ(tile);
00406   }
00407 }
00408 
00409 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh)
00410 {
00411   return IsOwnedLand(tile) ? FOUNDATION_NONE : FlatteningFoundation(tileh);
00412 }
00413 
00418 static void ReallyClearObjectTile(Object *o)
00419 {
00420   Object::DecTypeCount(GetObjectType(o->location.tile));
00421   TILE_AREA_LOOP(tile_cur, o->location) {
00422     DeleteNewGRFInspectWindow(GSF_OBJECTS, tile_cur);
00423 
00424     MakeWaterKeepingClass(tile_cur, GetTileOwner(tile_cur));
00425   }
00426   delete o;
00427 }
00428 
00429 SmallVector<ClearedObjectArea, 4> _cleared_object_areas;
00430 
00436 ClearedObjectArea *FindClearedObject(TileIndex tile)
00437 {
00438   TileArea ta = TileArea(tile, 1, 1);
00439 
00440   const ClearedObjectArea *end = _cleared_object_areas.End();
00441   for (ClearedObjectArea *coa = _cleared_object_areas.Begin(); coa != end; coa++) {
00442     if (coa->area.Intersects(ta)) return coa;
00443   }
00444 
00445   return NULL;
00446 }
00447 
00448 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags)
00449 {
00450   ObjectType type = GetObjectType(tile);
00451   const ObjectSpec *spec = ObjectSpec::Get(type);
00452 
00453   /* Get to the northern most tile. */
00454   Object *o = Object::GetByTile(tile);
00455   TileArea ta = o->location;
00456 
00457   CommandCost cost(EXPENSES_CONSTRUCTION, spec->GetClearCost() * ta.w * ta.h / 5);
00458   if (spec->flags & OBJECT_FLAG_CLEAR_INCOME) cost.MultiplyCost(-1); // They get an income!
00459 
00460   /* Water can remove everything! */
00461   if (_current_company != OWNER_WATER) {
00462     if ((flags & DC_NO_WATER) && IsTileOnWater(tile)) {
00463       /* There is water under the object, treat it as water tile. */
00464       return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00465     } else if (!(spec->flags & OBJECT_FLAG_AUTOREMOVE) && (flags & DC_AUTO)) {
00466       /* No automatic removal by overbuilding stuff. */
00467       return_cmd_error(type == OBJECT_HQ ? STR_ERROR_COMPANY_HEADQUARTERS_IN : STR_ERROR_OBJECT_IN_THE_WAY);
00468     } else if (_game_mode == GM_EDITOR) {
00469       /* No further limitations for the editor. */
00470     } else if (GetTileOwner(tile) == OWNER_NONE) {
00471       /* Owned by nobody, so we can only remove it with brute force! */
00472       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00473     } else if (CheckTileOwnership(tile).Failed()) {
00474       /* We don't own it!. */
00475       return_cmd_error(STR_ERROR_OWNED_BY);
00476     } else if ((spec->flags & OBJECT_FLAG_CANNOT_REMOVE) != 0 && (spec->flags & OBJECT_FLAG_AUTOREMOVE) == 0) {
00477       /* In the game editor or with cheats we can remove, otherwise we can't. */
00478       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00479 
00480       /* Removing with the cheat costs more in TTDPatch / the specs. */
00481       cost.MultiplyCost(25);
00482     }
00483   } else if ((spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0) {
00484     /* Water can't remove objects that are buildable on water. */
00485     return CMD_ERROR;
00486   }
00487 
00488   switch (type) {
00489     case OBJECT_HQ: {
00490       Company *c = Company::Get(GetTileOwner(tile));
00491       if (flags & DC_EXEC) {
00492         c->location_of_HQ = INVALID_TILE; // reset HQ position
00493         SetWindowDirty(WC_COMPANY, c->index);
00494         CargoPacket::InvalidateAllFrom(ST_HEADQUARTERS, c->index);
00495       }
00496 
00497       /* cost of relocating company is 1% of company value */
00498       cost = CommandCost(EXPENSES_PROPERTY, CalculateCompanyValue(c) / 100);
00499       break;
00500     }
00501 
00502     case OBJECT_STATUE:
00503       if (flags & DC_EXEC) {
00504         Town *town = o->town;
00505         ClrBit(town->statues, GetTileOwner(tile));
00506         SetWindowDirty(WC_TOWN_AUTHORITY, town->index);
00507       }
00508       break;
00509 
00510     default:
00511       break;
00512   }
00513 
00514   ClearedObjectArea *cleared_area = _cleared_object_areas.Append();
00515   cleared_area->first_tile = tile;
00516   cleared_area->area = ta;
00517 
00518   if (flags & DC_EXEC) ReallyClearObjectTile(o);
00519 
00520   return cost;
00521 }
00522 
00523 static void AddAcceptedCargo_Object(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted)
00524 {
00525   if (!IsCompanyHQ(tile)) return;
00526 
00527   /* HQ accepts passenger and mail; but we have to divide the values
00528    * between 4 tiles it occupies! */
00529 
00530   /* HQ level (depends on company performance) in the range 1..5. */
00531   uint level = GetCompanyHQSize(tile) + 1;
00532 
00533   /* Top town building generates 10, so to make HQ interesting, the top
00534    * type makes 20. */
00535   acceptance[CT_PASSENGERS] += max(1U, level);
00536   SetBit(*always_accepted, CT_PASSENGERS);
00537 
00538   /* Top town building generates 4, HQ can make up to 8. The
00539    * proportion passengers:mail is different because such a huge
00540    * commercial building generates unusually high amount of mail
00541    * correspondence per physical visitor. */
00542   acceptance[CT_MAIL] += max(1U, level / 2);
00543   SetBit(*always_accepted, CT_MAIL);
00544 }
00545 
00546 
00547 static void GetTileDesc_Object(TileIndex tile, TileDesc *td)
00548 {
00549   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00550   td->str = spec->name;
00551   td->owner[0] = GetTileOwner(tile);
00552   td->build_date = Object::GetByTile(tile)->build_date;
00553 
00554   if (spec->grf_prop.grffile != NULL) {
00555     td->grf = GetGRFConfig(spec->grf_prop.grffile->grfid)->GetName();
00556   }
00557 }
00558 
00559 static void TileLoop_Object(TileIndex tile)
00560 {
00561   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00562   if (spec->flags & OBJECT_FLAG_ANIMATION) {
00563     Object *o = Object::GetByTile(tile);
00564     TriggerObjectTileAnimation(o, tile, OAT_TILELOOP, spec);
00565     if (o->location.tile == tile) TriggerObjectAnimation(o, OAT_256_TICKS, spec);
00566   }
00567 
00568   if (IsTileOnWater(tile)) TileLoop_Water(tile);
00569 
00570   if (!IsCompanyHQ(tile)) return;
00571 
00572   /* HQ accepts passenger and mail; but we have to divide the values
00573    * between 4 tiles it occupies! */
00574 
00575   /* HQ level (depends on company performance) in the range 1..5. */
00576   uint level = GetCompanyHQSize(tile) + 1;
00577   assert(level < 6);
00578 
00579   StationFinder stations(TileArea(tile, 2, 2));
00580 
00581   uint r = Random();
00582   /* Top town buildings generate 250, so the top HQ type makes 256. */
00583   if (GB(r, 0, 8) < (256 / 4 / (6 - level))) {
00584     uint amt = GB(r, 0, 8) / 8 / 4 + 1;
00585     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00586     MoveGoodsToStation(CT_PASSENGERS, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00587   }
00588 
00589   /* Top town building generates 90, HQ can make up to 196. The
00590    * proportion passengers:mail is about the same as in the acceptance
00591    * equations. */
00592   if (GB(r, 8, 8) < (196 / 4 / (6 - level))) {
00593     uint amt = GB(r, 8, 8) / 8 / 4 + 1;
00594     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00595     MoveGoodsToStation(CT_MAIL, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00596   }
00597 }
00598 
00599 
00600 static TrackStatus GetTileTrackStatus_Object(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
00601 {
00602   return 0;
00603 }
00604 
00605 static bool ClickTile_Object(TileIndex tile)
00606 {
00607   if (!IsCompanyHQ(tile)) return false;
00608 
00609   ShowCompany(GetTileOwner(tile));
00610   return true;
00611 }
00612 
00613 static void AnimateTile_Object(TileIndex tile)
00614 {
00615   AnimateNewObjectTile(tile);
00616 }
00617 
00624 static bool HasTransmitter(TileIndex tile, void *user)
00625 {
00626   return IsTransmitterTile(tile);
00627 }
00628 
00629 void GenerateObjects()
00630 {
00631   if (_settings_game.game_creation.landscape == LT_TOYLAND) return;
00632 
00633   /* add radio tower */
00634   int radiotower_to_build = ScaleByMapSize(15); // maximum number of radio towers on the map
00635   int lighthouses_to_build = _settings_game.game_creation.landscape == LT_TROPIC ? 0 : ScaleByMapSize1D((Random() & 3) + 7);
00636 
00637   /* Scale the amount of lighthouses with the amount of land at the borders. */
00638   if (_settings_game.construction.freeform_edges && lighthouses_to_build != 0) {
00639     uint num_water_tiles = 0;
00640     for (uint x = 0; x < MapMaxX(); x++) {
00641       if (IsTileType(TileXY(x, 1), MP_WATER)) num_water_tiles++;
00642       if (IsTileType(TileXY(x, MapMaxY() - 1), MP_WATER)) num_water_tiles++;
00643     }
00644     for (uint y = 1; y < MapMaxY() - 1; y++) {
00645       if (IsTileType(TileXY(1, y), MP_WATER)) num_water_tiles++;
00646       if (IsTileType(TileXY(MapMaxX() - 1, y), MP_WATER)) num_water_tiles++;
00647     }
00648     /* The -6 is because the top borders are MP_VOID (-2) and all corners
00649      * are counted twice (-4). */
00650     lighthouses_to_build = lighthouses_to_build * num_water_tiles / (2 * MapMaxY() + 2 * MapMaxX() - 6);
00651   }
00652 
00653   SetGeneratingWorldProgress(GWP_OBJECT, radiotower_to_build + lighthouses_to_build);
00654 
00655   for (uint i = ScaleByMapSize(1000); i != 0 && Object::CanAllocateItem(); i--) {
00656     TileIndex tile = RandomTile();
00657 
00658     int h;
00659     if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h >= 4 && !IsBridgeAbove(tile)) {
00660       TileIndex t = tile;
00661       if (CircularTileSearch(&t, 9, HasTransmitter, NULL)) continue;
00662 
00663       BuildObject(OBJECT_TRANSMITTER, tile);
00664       IncreaseGeneratingWorldProgress(GWP_OBJECT);
00665       if (--radiotower_to_build == 0) break;
00666     }
00667   }
00668 
00669   /* add lighthouses */
00670   uint maxx = MapMaxX();
00671   uint maxy = MapMaxY();
00672   for (int loop_count = 0; loop_count < 1000 && lighthouses_to_build != 0 && Object::CanAllocateItem(); loop_count++) {
00673     uint r = Random();
00674 
00675     /* Scatter the lighthouses more evenly around the perimeter */
00676     int perimeter = (GB(r, 16, 16) % (2 * (maxx + maxy))) - maxy;
00677     DiagDirection dir;
00678     for (dir = DIAGDIR_NE; perimeter > 0; dir++) {
00679       perimeter -= (DiagDirToAxis(dir) == AXIS_X) ? maxx : maxy;
00680     }
00681 
00682     TileIndex tile;
00683     switch (dir) {
00684       default:
00685       case DIAGDIR_NE: tile = TileXY(maxx - 1, r % maxy); break;
00686       case DIAGDIR_SE: tile = TileXY(r % maxx, 1); break;
00687       case DIAGDIR_SW: tile = TileXY(1,        r % maxy); break;
00688       case DIAGDIR_NW: tile = TileXY(r % maxx, maxy - 1); break;
00689     }
00690 
00691     /* Only build lighthouses at tiles where the border is sea. */
00692     if (!IsTileType(tile, MP_WATER)) continue;
00693 
00694     for (int j = 0; j < 19; j++) {
00695       int h;
00696       if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h <= 2 && !IsBridgeAbove(tile)) {
00697         BuildObject(OBJECT_LIGHTHOUSE, tile);
00698         IncreaseGeneratingWorldProgress(GWP_OBJECT);
00699         lighthouses_to_build--;
00700         assert(tile < MapSize());
00701         break;
00702       }
00703       tile += TileOffsByDiagDir(dir);
00704       if (!IsValidTile(tile)) break;
00705     }
00706   }
00707 }
00708 
00709 static void ChangeTileOwner_Object(TileIndex tile, Owner old_owner, Owner new_owner)
00710 {
00711   if (!IsTileOwner(tile, old_owner)) return;
00712 
00713   if (IsOwnedLand(tile) && new_owner != INVALID_OWNER) {
00714     SetTileOwner(tile, new_owner);
00715   } else if (IsStatueTile(tile)) {
00716     Town *t = Object::GetByTile(tile)->town;
00717     ClrBit(t->statues, old_owner);
00718     if (new_owner != INVALID_OWNER && !HasBit(t->statues, new_owner)) {
00719       /* Transfer ownership to the new company */
00720       SetBit(t->statues, new_owner);
00721       SetTileOwner(tile, new_owner);
00722     } else {
00723       ReallyClearObjectTile(Object::GetByTile(tile));
00724     }
00725 
00726     SetWindowDirty(WC_TOWN_AUTHORITY, t->index);
00727   } else {
00728     ReallyClearObjectTile(Object::GetByTile(tile));
00729   }
00730 }
00731 
00732 static CommandCost TerraformTile_Object(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
00733 {
00734   ObjectType type = GetObjectType(tile);
00735 
00736   if (type == OBJECT_OWNED_LAND) {
00737     /* Owned land remains unsold */
00738     CommandCost ret = CheckTileOwnership(tile);
00739     if (ret.Succeeded()) return CommandCost();
00740   } else if (AutoslopeEnabled() && type != OBJECT_TRANSMITTER && type != OBJECT_LIGHTHOUSE) {
00741     /* Behaviour:
00742      *  - Both new and old slope must not be steep.
00743      *  - TileMaxZ must not be changed.
00744      *  - Allow autoslope by default.
00745      *  - Disallow autoslope if callback succeeds and returns non-zero.
00746      */
00747     Slope tileh_old = GetTileSlope(tile);
00748     /* TileMaxZ must not be changed. Slopes must not be steep. */
00749     if (!IsSteepSlope(tileh_old) && !IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
00750       const ObjectSpec *spec = ObjectSpec::Get(type);
00751 
00752       /* Call callback 'disable autosloping for objects'. */
00753       if (HasBit(spec->callback_mask, CBM_OBJ_AUTOSLOPE)) {
00754         /* If the callback fails, allow autoslope. */
00755         uint16 res = GetObjectCallback(CBID_OBJECT_AUTOSLOPE, 0, 0, spec, Object::GetByTile(tile), tile);
00756         if (res == CALLBACK_FAILED || !ConvertBooleanCallback(spec->grf_prop.grffile, CBID_OBJECT_AUTOSLOPE, res)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00757       } else if (spec->enabled) {
00758         /* allow autoslope */
00759         return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00760       }
00761     }
00762   }
00763 
00764   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00765 }
00766 
00767 extern const TileTypeProcs _tile_type_object_procs = {
00768   DrawTile_Object,             // draw_tile_proc
00769   GetSlopePixelZ_Object,       // get_slope_z_proc
00770   ClearTile_Object,            // clear_tile_proc
00771   AddAcceptedCargo_Object,     // add_accepted_cargo_proc
00772   GetTileDesc_Object,          // get_tile_desc_proc
00773   GetTileTrackStatus_Object,   // get_tile_track_status_proc
00774   ClickTile_Object,            // click_tile_proc
00775   AnimateTile_Object,          // animate_tile_proc
00776   TileLoop_Object,             // tile_loop_proc
00777   ChangeTileOwner_Object,      // change_tile_owner_proc
00778   NULL,                        // add_produced_cargo_proc
00779   NULL,                        // vehicle_enter_tile_proc
00780   GetFoundation_Object,        // get_foundation_proc
00781   TerraformTile_Object,        // terraform_tile_proc
00782 };