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 
00037 #include "table/strings.h"
00038 #include "table/object_land.h"
00039 
00040 ObjectPool _object_pool("Object");
00041 INSTANTIATE_POOL_METHODS(Object)
00042 uint16 Object::counts[NUM_OBJECTS];
00043 
00049 /* static */ Object *Object::GetByTile(TileIndex tile)
00050 {
00051   return Object::Get(GetObjectIndex(tile));
00052 }
00053 
00055 void InitializeObjects()
00056 {
00057   Object::ResetTypeCounts();
00058 }
00059 
00070 void BuildObject(ObjectType type, TileIndex tile, CompanyID owner, Town *town, uint8 view)
00071 {
00072   const ObjectSpec *spec = ObjectSpec::Get(type);
00073 
00074   TileArea ta(tile, GB(spec->size, HasBit(view, 0) ? 4 : 0, 4), GB(spec->size, HasBit(view, 0) ? 0 : 4, 4));
00075   Object *o = new Object();
00076   o->location      = ta;
00077   o->town          = town == NULL ? CalcClosestTownFromTile(tile) : town;
00078   o->build_date    = _date;
00079   o->view          = view;
00080 
00081   /* If nothing owns the object, the colour will be random. Otherwise
00082    * get the colour from the company's livery settings. */
00083   if (owner == OWNER_NONE) {
00084     o->colour = Random();
00085   } else {
00086     const Livery *l = Company::Get(owner)->livery;
00087     o->colour = l->colour1 + l->colour2 * 16;
00088   }
00089 
00090   /* If the object wants only one colour, then give it that colour. */
00091   if ((spec->flags & OBJECT_FLAG_2CC_COLOUR) == 0) o->colour &= 0xF;
00092 
00093   if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) {
00094     uint16 res = GetObjectCallback(CBID_OBJECT_COLOUR, o->colour, 0, spec, o, tile);
00095     if (res != CALLBACK_FAILED) {
00096       if (res >= 0x100) ErrorUnknownCallbackResult(spec->grf_prop.grffile->grfid, CBID_OBJECT_COLOUR, res);
00097       o->colour = GB(res, 0, 8);
00098     }
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     /* Update company infrastructure counts for objects build on canals owned by nobody. */
00106     if (wc == WATER_CLASS_CANAL && owner != OWNER_NONE && (IsTileOwner(tile, OWNER_NONE) || IsTileOwner(tile, OWNER_WATER))) {
00107       Company::Get(owner)->infrastructure.water++;
00108       DirtyCompanyInfrastructureWindows(owner);
00109     }
00110     MakeObject(t, type, owner, o->index, wc, Random());
00111     MarkTileDirtyByTile(t);
00112   }
00113 
00114   Object::IncTypeCount(type);
00115   if (spec->flags & OBJECT_FLAG_ANIMATION) TriggerObjectAnimation(o, OAT_BUILT, spec);
00116 }
00117 
00122 static void IncreaseAnimationStage(TileIndex tile)
00123 {
00124   TileArea ta = Object::GetByTile(tile)->location;
00125   TILE_AREA_LOOP(t, ta) {
00126     SetAnimationFrame(t, GetAnimationFrame(t) + 1);
00127     MarkTileDirtyByTile(t);
00128   }
00129 }
00130 
00132 #define GetCompanyHQSize GetAnimationFrame
00133 
00134 #define IncreaseCompanyHQSize IncreaseAnimationStage
00135 
00141 void UpdateCompanyHQ(TileIndex tile, uint score)
00142 {
00143   if (tile == INVALID_TILE) return;
00144 
00145   byte val;
00146   (val = 0, score < 170) ||
00147   (val++, score < 350) ||
00148   (val++, score < 520) ||
00149   (val++, score < 720) ||
00150   (val++, true);
00151 
00152   while (GetCompanyHQSize(tile) < val) {
00153     IncreaseCompanyHQSize(tile);
00154   }
00155 }
00156 
00161 void UpdateObjectColours(const Company *c)
00162 {
00163   Object *obj;
00164   FOR_ALL_OBJECTS(obj) {
00165     Owner owner = GetTileOwner(obj->location.tile);
00166     /* Not the current owner, so colour doesn't change. */
00167     if (owner != c->index) continue;
00168 
00169     const ObjectSpec *spec = ObjectSpec::GetByTile(obj->location.tile);
00170     /* Using the object colour callback, so not using company colour. */
00171     if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) continue;
00172 
00173     const Livery *l = c->livery;
00174     obj->colour = ((spec->flags & OBJECT_FLAG_2CC_COLOUR) ? (l->colour2 * 16) : 0) + l->colour1;
00175   }
00176 }
00177 
00178 extern CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool allow_steep, bool check_bridge);
00179 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags);
00180 
00190 CommandCost CmdBuildObject(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00191 {
00192   CommandCost cost(EXPENSES_PROPERTY);
00193 
00194   ObjectType type = (ObjectType)GB(p1, 0, 8);
00195   uint8 view = GB(p2, 0, 2);
00196   const ObjectSpec *spec = ObjectSpec::Get(type);
00197   if (!spec->IsAvailable()) return CMD_ERROR;
00198 
00199   if (spec->flags & OBJECT_FLAG_ONLY_IN_SCENEDIT && (_game_mode != GM_EDITOR || _current_company != OWNER_NONE)) return CMD_ERROR;
00200   if (spec->flags & OBJECT_FLAG_ONLY_IN_GAME && (_game_mode != GM_NORMAL || _current_company > MAX_COMPANIES)) return CMD_ERROR;
00201   if (view >= spec->views) return CMD_ERROR;
00202 
00203   if (!Object::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_OBJECTS);
00204   if (Town::GetNumItems() == 0) return_cmd_error(STR_ERROR_MUST_FOUND_TOWN_FIRST);
00205 
00206   int size_x = GB(spec->size, HasBit(view, 0) ? 4 : 0, 4);
00207   int size_y = GB(spec->size, HasBit(view, 0) ? 0 : 4, 4);
00208   TileArea ta(tile, size_x, size_y);
00209 
00210   if (type == OBJECT_OWNED_LAND) {
00211     /* Owned land is special as it can be placed on any slope. */
00212     cost.AddCost(DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
00213   } else {
00214     /* Check the surface to build on. At this time we can't actually execute the
00215      * the CLEAR_TILE commands since the newgrf callback later on can check
00216      * some information about the tiles. */
00217     bool allow_water = (spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0;
00218     bool allow_ground = (spec->flags & OBJECT_FLAG_NOT_ON_LAND) == 0;
00219     TILE_AREA_LOOP(t, ta) {
00220       if (HasTileWaterGround(t)) {
00221         if (!allow_water) return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00222         if (!IsWaterTile(t)) {
00223           /* Normal water tiles don't have to be cleared. For all other tile types clear
00224            * the tile but leave the water. */
00225           cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_NO_WATER & ~DC_EXEC, CMD_LANDSCAPE_CLEAR));
00226         } else {
00227           /* Can't build on water owned by another company. */
00228           Owner o = GetTileOwner(t);
00229           if (o != OWNER_NONE && o != OWNER_WATER) cost.AddCost(CheckOwnership(o, t));
00230         }
00231       } else {
00232         if (!allow_ground) return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
00233         /* For non-water tiles, we'll have to clear it before building. */
00234         cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR));
00235       }
00236     }
00237 
00238     /* So, now the surface is checked... check the slope of said surface. */
00239     int allowed_z;
00240     if (GetTileSlope(tile, &allowed_z) != SLOPE_FLAT) allowed_z++;
00241 
00242     TILE_AREA_LOOP(t, ta) {
00243       uint16 callback = CALLBACK_FAILED;
00244       if (HasBit(spec->callback_mask, CBM_OBJ_SLOPE_CHECK)) {
00245         TileIndex diff = t - tile;
00246         callback = GetObjectCallback(CBID_OBJECT_LAND_SLOPE_CHECK, GetTileSlope(t), TileY(diff) << 4 | TileX(diff), spec, NULL, t, view);
00247       }
00248 
00249       if (callback == CALLBACK_FAILED) {
00250         cost.AddCost(CheckBuildableTile(t, 0, allowed_z, false, false));
00251       } else {
00252         /* The meaning of bit 10 is inverted for a grf version < 8. */
00253         if (spec->grf_prop.grffile->grf_version < 8) ToggleBit(callback, 10);
00254         CommandCost ret = GetErrorMessageFromLocationCallbackResult(callback, spec->grf_prop.grffile->grfid, STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
00255         if (ret.Failed()) return ret;
00256       }
00257     }
00258 
00259     if (flags & DC_EXEC) {
00260       /* This is basically a copy of the loop above with the exception that we now
00261        * execute the commands and don't check for errors, since that's already done. */
00262       TILE_AREA_LOOP(t, ta) {
00263         if (HasTileWaterGround(t)) {
00264           if (!IsWaterTile(t)) {
00265             DoCommand(t, 0, 0, (flags & ~DC_NO_WATER) | DC_NO_MODIFY_TOWN_RATING, CMD_LANDSCAPE_CLEAR);
00266           }
00267         } else {
00268           DoCommand(t, 0, 0, flags | DC_NO_MODIFY_TOWN_RATING, CMD_LANDSCAPE_CLEAR);
00269         }
00270       }
00271     }
00272   }
00273   if (cost.Failed()) return cost;
00274 
00275   /* Finally do a check for bridges. */
00276   TILE_AREA_LOOP(t, ta) {
00277     if (MayHaveBridgeAbove(t) && IsBridgeAbove(t) && (
00278         !(spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) ||
00279         (GetTileMaxZ(t) + spec->height >= GetBridgeHeight(GetSouthernBridgeEnd(t))))) {
00280       return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00281     }
00282   }
00283 
00284   int hq_score = 0;
00285   switch (type) {
00286     case OBJECT_TRANSMITTER:
00287     case OBJECT_LIGHTHOUSE:
00288       if (GetTileSlope(tile) != SLOPE_FLAT) return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00289       break;
00290 
00291     case OBJECT_OWNED_LAND:
00292       if (IsTileType(tile, MP_OBJECT) &&
00293           IsTileOwner(tile, _current_company) &&
00294           IsOwnedLand(tile)) {
00295         return_cmd_error(STR_ERROR_YOU_ALREADY_OWN_IT);
00296       }
00297       break;
00298 
00299     case OBJECT_HQ: {
00300       Company *c = Company::Get(_current_company);
00301       if (c->location_of_HQ != INVALID_TILE) {
00302         /* We need to persuade a bit harder to remove the old HQ. */
00303         _current_company = OWNER_WATER;
00304         cost.AddCost(ClearTile_Object(c->location_of_HQ, flags));
00305         _current_company = c->index;
00306       }
00307 
00308       if (flags & DC_EXEC) {
00309         hq_score = UpdateCompanyRatingAndValue(c, false);
00310         c->location_of_HQ = tile;
00311         SetWindowDirty(WC_COMPANY, c->index);
00312       }
00313       break;
00314     }
00315 
00316     case OBJECT_STATUE:
00317       /* This may never be constructed using this method. */
00318       return CMD_ERROR;
00319 
00320     default: // i.e. NewGRF provided.
00321       break;
00322   }
00323 
00324   if (flags & DC_EXEC) {
00325     BuildObject(type, tile, _current_company, NULL, view);
00326 
00327     /* Make sure the HQ starts at the right size. */
00328     if (type == OBJECT_HQ) UpdateCompanyHQ(tile, hq_score);
00329   }
00330 
00331   cost.AddCost(ObjectSpec::Get(type)->GetBuildCost() * size_x * size_y);
00332   return cost;
00333 }
00334 
00335 
00336 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh);
00337 
00338 static void DrawTile_Object(TileInfo *ti)
00339 {
00340   ObjectType type = GetObjectType(ti->tile);
00341   const ObjectSpec *spec = ObjectSpec::Get(type);
00342 
00343   /* Fall back for when the object doesn't exist anymore. */
00344   if (!spec->enabled) type = OBJECT_TRANSMITTER;
00345 
00346   if ((spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) == 0) DrawFoundation(ti, GetFoundation_Object(ti->tile, ti->tileh));
00347 
00348   if (type < NEW_OBJECT_OFFSET) {
00349     const DrawTileSprites *dts = NULL;
00350     Owner to = GetTileOwner(ti->tile);
00351     PaletteID palette = to == OWNER_NONE ? PAL_NONE : COMPANY_SPRITE_COLOUR(to);
00352 
00353     if (type == OBJECT_HQ) {
00354       TileIndex diff = ti->tile - Object::GetByTile(ti->tile)->location.tile;
00355       dts = &_object_hq[GetCompanyHQSize(ti->tile) << 2 | TileY(diff) << 1 | TileX(diff)];
00356     } else {
00357       dts = &_objects[type];
00358     }
00359 
00360     if (spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) {
00361       /* If an object has no foundation, but tries to draw a (flat) ground
00362        * type... we have to be nice and convert that for them. */
00363       switch (dts->ground.sprite) {
00364         case SPR_FLAT_BARE_LAND:          DrawClearLandTile(ti, 0); break;
00365         case SPR_FLAT_1_THIRD_GRASS_TILE: DrawClearLandTile(ti, 1); break;
00366         case SPR_FLAT_2_THIRD_GRASS_TILE: DrawClearLandTile(ti, 2); break;
00367         case SPR_FLAT_GRASS_TILE:         DrawClearLandTile(ti, 3); break;
00368         default: DrawGroundSprite(dts->ground.sprite, palette);     break;
00369       }
00370     } else {
00371       DrawGroundSprite(dts->ground.sprite, palette);
00372     }
00373 
00374     if (!IsInvisibilitySet(TO_STRUCTURES)) {
00375       const DrawTileSeqStruct *dtss;
00376       foreach_draw_tile_seq(dtss, dts->seq) {
00377         AddSortableSpriteToDraw(
00378           dtss->image.sprite, palette,
00379           ti->x + dtss->delta_x, ti->y + dtss->delta_y,
00380           dtss->size_x, dtss->size_y,
00381           dtss->size_z, ti->z + dtss->delta_z,
00382           IsTransparencySet(TO_STRUCTURES)
00383         );
00384       }
00385     }
00386   } else {
00387     DrawNewObjectTile(ti, spec);
00388   }
00389 
00390   if (spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) DrawBridgeMiddle(ti);
00391 }
00392 
00393 static int GetSlopePixelZ_Object(TileIndex tile, uint x, uint y)
00394 {
00395   if (IsOwnedLand(tile)) {
00396     int z;
00397     Slope tileh = GetTilePixelSlope(tile, &z);
00398 
00399     return z + GetPartialPixelZ(x & 0xF, y & 0xF, tileh);
00400   } else {
00401     return GetTileMaxPixelZ(tile);
00402   }
00403 }
00404 
00405 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh)
00406 {
00407   return IsOwnedLand(tile) ? FOUNDATION_NONE : FlatteningFoundation(tileh);
00408 }
00409 
00414 static void ReallyClearObjectTile(Object *o)
00415 {
00416   Object::DecTypeCount(GetObjectType(o->location.tile));
00417   TILE_AREA_LOOP(tile_cur, o->location) {
00418     DeleteNewGRFInspectWindow(GSF_OBJECTS, tile_cur);
00419 
00420     MakeWaterKeepingClass(tile_cur, GetTileOwner(tile_cur));
00421   }
00422   delete o;
00423 }
00424 
00425 SmallVector<ClearedObjectArea, 4> _cleared_object_areas;
00426 
00432 ClearedObjectArea *FindClearedObject(TileIndex tile)
00433 {
00434   TileArea ta = TileArea(tile, 1, 1);
00435 
00436   const ClearedObjectArea *end = _cleared_object_areas.End();
00437   for (ClearedObjectArea *coa = _cleared_object_areas.Begin(); coa != end; coa++) {
00438     if (coa->area.Intersects(ta)) return coa;
00439   }
00440 
00441   return NULL;
00442 }
00443 
00444 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags)
00445 {
00446   ObjectType type = GetObjectType(tile);
00447   const ObjectSpec *spec = ObjectSpec::Get(type);
00448 
00449   /* Get to the northern most tile. */
00450   Object *o = Object::GetByTile(tile);
00451   TileArea ta = o->location;
00452 
00453   CommandCost cost(EXPENSES_CONSTRUCTION, spec->GetClearCost() * ta.w * ta.h / 5);
00454   if (spec->flags & OBJECT_FLAG_CLEAR_INCOME) cost.MultiplyCost(-1); // They get an income!
00455 
00456   /* Water can remove everything! */
00457   if (_current_company != OWNER_WATER) {
00458     if ((flags & DC_NO_WATER) && IsTileOnWater(tile)) {
00459       /* There is water under the object, treat it as water tile. */
00460       return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00461     } else if (!(spec->flags & OBJECT_FLAG_AUTOREMOVE) && (flags & DC_AUTO)) {
00462       /* No automatic removal by overbuilding stuff. */
00463       return_cmd_error(type == OBJECT_HQ ? STR_ERROR_COMPANY_HEADQUARTERS_IN : STR_ERROR_OBJECT_IN_THE_WAY);
00464     } else if (_game_mode == GM_EDITOR) {
00465       /* No further limitations for the editor. */
00466     } else if (GetTileOwner(tile) == OWNER_NONE) {
00467       /* Owned by nobody, so we can only remove it with brute force! */
00468       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00469     } else if (CheckTileOwnership(tile).Failed()) {
00470       /* We don't own it!. */
00471       return_cmd_error(STR_ERROR_OWNED_BY);
00472     } else if ((spec->flags & OBJECT_FLAG_CANNOT_REMOVE) != 0 && (spec->flags & OBJECT_FLAG_AUTOREMOVE) == 0) {
00473       /* In the game editor or with cheats we can remove, otherwise we can't. */
00474       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00475 
00476       /* Removing with the cheat costs more in TTDPatch / the specs. */
00477       cost.MultiplyCost(25);
00478     }
00479   } else if ((spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0) {
00480     /* Water can't remove objects that are buildable on water. */
00481     return CMD_ERROR;
00482   }
00483 
00484   switch (type) {
00485     case OBJECT_HQ: {
00486       Company *c = Company::Get(GetTileOwner(tile));
00487       if (flags & DC_EXEC) {
00488         c->location_of_HQ = INVALID_TILE; // reset HQ position
00489         SetWindowDirty(WC_COMPANY, c->index);
00490         CargoPacket::InvalidateAllFrom(ST_HEADQUARTERS, c->index);
00491       }
00492 
00493       /* cost of relocating company is 1% of company value */
00494       cost = CommandCost(EXPENSES_PROPERTY, CalculateCompanyValue(c) / 100);
00495       break;
00496     }
00497 
00498     case OBJECT_STATUE:
00499       if (flags & DC_EXEC) {
00500         Town *town = o->town;
00501         ClrBit(town->statues, GetTileOwner(tile));
00502         SetWindowDirty(WC_TOWN_AUTHORITY, town->index);
00503       }
00504       break;
00505 
00506     default:
00507       break;
00508   }
00509 
00510   ClearedObjectArea *cleared_area = _cleared_object_areas.Append();
00511   cleared_area->first_tile = tile;
00512   cleared_area->area = ta;
00513 
00514   if (flags & DC_EXEC) ReallyClearObjectTile(o);
00515 
00516   return cost;
00517 }
00518 
00519 static void AddAcceptedCargo_Object(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted)
00520 {
00521   if (!IsCompanyHQ(tile)) return;
00522 
00523   /* HQ accepts passenger and mail; but we have to divide the values
00524    * between 4 tiles it occupies! */
00525 
00526   /* HQ level (depends on company performance) in the range 1..5. */
00527   uint level = GetCompanyHQSize(tile) + 1;
00528 
00529   /* Top town building generates 10, so to make HQ interesting, the top
00530    * type makes 20. */
00531   acceptance[CT_PASSENGERS] += max(1U, level);
00532   SetBit(*always_accepted, CT_PASSENGERS);
00533 
00534   /* Top town building generates 4, HQ can make up to 8. The
00535    * proportion passengers:mail is different because such a huge
00536    * commercial building generates unusually high amount of mail
00537    * correspondence per physical visitor. */
00538   acceptance[CT_MAIL] += max(1U, level / 2);
00539   SetBit(*always_accepted, CT_MAIL);
00540 }
00541 
00542 
00543 static void GetTileDesc_Object(TileIndex tile, TileDesc *td)
00544 {
00545   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00546   td->str = spec->name;
00547   td->owner[0] = GetTileOwner(tile);
00548   td->build_date = Object::GetByTile(tile)->build_date;
00549 
00550   if (spec->grf_prop.grffile != NULL) {
00551     td->grf = GetGRFConfig(spec->grf_prop.grffile->grfid)->GetName();
00552   }
00553 }
00554 
00555 static void TileLoop_Object(TileIndex tile)
00556 {
00557   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00558   if (spec->flags & OBJECT_FLAG_ANIMATION) {
00559     Object *o = Object::GetByTile(tile);
00560     TriggerObjectTileAnimation(o, tile, OAT_TILELOOP, spec);
00561     if (o->location.tile == tile) TriggerObjectAnimation(o, OAT_256_TICKS, spec);
00562   }
00563 
00564   if (IsTileOnWater(tile)) TileLoop_Water(tile);
00565 
00566   if (!IsCompanyHQ(tile)) return;
00567 
00568   /* HQ accepts passenger and mail; but we have to divide the values
00569    * between 4 tiles it occupies! */
00570 
00571   /* HQ level (depends on company performance) in the range 1..5. */
00572   uint level = GetCompanyHQSize(tile) + 1;
00573   assert(level < 6);
00574 
00575   StationFinder stations(TileArea(tile, 2, 2));
00576 
00577   uint r = Random();
00578   /* Top town buildings generate 250, so the top HQ type makes 256. */
00579   if (GB(r, 0, 8) < (256 / 4 / (6 - level))) {
00580     uint amt = GB(r, 0, 8) / 8 / 4 + 1;
00581     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00582     MoveGoodsToStation(CT_PASSENGERS, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00583   }
00584 
00585   /* Top town building generates 90, HQ can make up to 196. The
00586    * proportion passengers:mail is about the same as in the acceptance
00587    * equations. */
00588   if (GB(r, 8, 8) < (196 / 4 / (6 - level))) {
00589     uint amt = GB(r, 8, 8) / 8 / 4 + 1;
00590     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00591     MoveGoodsToStation(CT_MAIL, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00592   }
00593 }
00594 
00595 
00596 static TrackStatus GetTileTrackStatus_Object(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
00597 {
00598   return 0;
00599 }
00600 
00601 static bool ClickTile_Object(TileIndex tile)
00602 {
00603   if (!IsCompanyHQ(tile)) return false;
00604 
00605   ShowCompany(GetTileOwner(tile));
00606   return true;
00607 }
00608 
00609 static void AnimateTile_Object(TileIndex tile)
00610 {
00611   AnimateNewObjectTile(tile);
00612 }
00613 
00620 static bool HasTransmitter(TileIndex tile, void *user)
00621 {
00622   return IsTransmitterTile(tile);
00623 }
00624 
00625 void GenerateObjects()
00626 {
00627   if (_settings_game.game_creation.landscape == LT_TOYLAND) return;
00628 
00629   /* add radio tower */
00630   int radiotower_to_build = ScaleByMapSize(15); // maximum number of radio towers on the map
00631   int lighthouses_to_build = _settings_game.game_creation.landscape == LT_TROPIC ? 0 : ScaleByMapSize1D((Random() & 3) + 7);
00632 
00633   /* Scale the amount of lighthouses with the amount of land at the borders. */
00634   if (_settings_game.construction.freeform_edges && lighthouses_to_build != 0) {
00635     uint num_water_tiles = 0;
00636     for (uint x = 0; x < MapMaxX(); x++) {
00637       if (IsTileType(TileXY(x, 1), MP_WATER)) num_water_tiles++;
00638       if (IsTileType(TileXY(x, MapMaxY() - 1), MP_WATER)) num_water_tiles++;
00639     }
00640     for (uint y = 1; y < MapMaxY() - 1; y++) {
00641       if (IsTileType(TileXY(1, y), MP_WATER)) num_water_tiles++;
00642       if (IsTileType(TileXY(MapMaxX() - 1, y), MP_WATER)) num_water_tiles++;
00643     }
00644     /* The -6 is because the top borders are MP_VOID (-2) and all corners
00645      * are counted twice (-4). */
00646     lighthouses_to_build = lighthouses_to_build * num_water_tiles / (2 * MapMaxY() + 2 * MapMaxX() - 6);
00647   }
00648 
00649   SetGeneratingWorldProgress(GWP_OBJECT, radiotower_to_build + lighthouses_to_build);
00650 
00651   for (uint i = ScaleByMapSize(1000); i != 0 && Object::CanAllocateItem(); i--) {
00652     TileIndex tile = RandomTile();
00653 
00654     int h;
00655     if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h >= 4 && !IsBridgeAbove(tile)) {
00656       TileIndex t = tile;
00657       if (CircularTileSearch(&t, 9, HasTransmitter, NULL)) continue;
00658 
00659       BuildObject(OBJECT_TRANSMITTER, tile);
00660       IncreaseGeneratingWorldProgress(GWP_OBJECT);
00661       if (--radiotower_to_build == 0) break;
00662     }
00663   }
00664 
00665   /* add lighthouses */
00666   uint maxx = MapMaxX();
00667   uint maxy = MapMaxY();
00668   for (int loop_count = 0; loop_count < 1000 && lighthouses_to_build != 0 && Object::CanAllocateItem(); loop_count++) {
00669     uint r = Random();
00670 
00671     /* Scatter the lighthouses more evenly around the perimeter */
00672     int perimeter = (GB(r, 16, 16) % (2 * (maxx + maxy))) - maxy;
00673     DiagDirection dir;
00674     for (dir = DIAGDIR_NE; perimeter > 0; dir++) {
00675       perimeter -= (DiagDirToAxis(dir) == AXIS_X) ? maxx : maxy;
00676     }
00677 
00678     TileIndex tile;
00679     switch (dir) {
00680       default:
00681       case DIAGDIR_NE: tile = TileXY(maxx - 1, r % maxy); break;
00682       case DIAGDIR_SE: tile = TileXY(r % maxx, 1); break;
00683       case DIAGDIR_SW: tile = TileXY(1,        r % maxy); break;
00684       case DIAGDIR_NW: tile = TileXY(r % maxx, maxy - 1); break;
00685     }
00686 
00687     /* Only build lighthouses at tiles where the border is sea. */
00688     if (!IsTileType(tile, MP_WATER)) continue;
00689 
00690     for (int j = 0; j < 19; j++) {
00691       int h;
00692       if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h <= 2 && !IsBridgeAbove(tile)) {
00693         BuildObject(OBJECT_LIGHTHOUSE, tile);
00694         IncreaseGeneratingWorldProgress(GWP_OBJECT);
00695         lighthouses_to_build--;
00696         assert(tile < MapSize());
00697         break;
00698       }
00699       tile += TileOffsByDiagDir(dir);
00700       if (!IsValidTile(tile)) break;
00701     }
00702   }
00703 }
00704 
00705 static void ChangeTileOwner_Object(TileIndex tile, Owner old_owner, Owner new_owner)
00706 {
00707   if (!IsTileOwner(tile, old_owner)) return;
00708 
00709   if (IsOwnedLand(tile) && new_owner != INVALID_OWNER) {
00710     SetTileOwner(tile, new_owner);
00711   } else if (IsStatueTile(tile)) {
00712     Town *t = Object::GetByTile(tile)->town;
00713     ClrBit(t->statues, old_owner);
00714     if (new_owner != INVALID_OWNER && !HasBit(t->statues, new_owner)) {
00715       /* Transfer ownership to the new company */
00716       SetBit(t->statues, new_owner);
00717       SetTileOwner(tile, new_owner);
00718     } else {
00719       ReallyClearObjectTile(Object::GetByTile(tile));
00720     }
00721 
00722     SetWindowDirty(WC_TOWN_AUTHORITY, t->index);
00723   } else {
00724     ReallyClearObjectTile(Object::GetByTile(tile));
00725   }
00726 }
00727 
00728 static CommandCost TerraformTile_Object(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
00729 {
00730   ObjectType type = GetObjectType(tile);
00731 
00732   if (type == OBJECT_OWNED_LAND) {
00733     /* Owned land remains unsold */
00734     CommandCost ret = CheckTileOwnership(tile);
00735     if (ret.Succeeded()) return CommandCost();
00736   } else if (AutoslopeEnabled() && type != OBJECT_TRANSMITTER && type != OBJECT_LIGHTHOUSE) {
00737     /* Behaviour:
00738      *  - Both new and old slope must not be steep.
00739      *  - TileMaxZ must not be changed.
00740      *  - Allow autoslope by default.
00741      *  - Disallow autoslope if callback succeeds and returns non-zero.
00742      */
00743     Slope tileh_old = GetTileSlope(tile);
00744     /* TileMaxZ must not be changed. Slopes must not be steep. */
00745     if (!IsSteepSlope(tileh_old) && !IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
00746       const ObjectSpec *spec = ObjectSpec::Get(type);
00747 
00748       /* Call callback 'disable autosloping for objects'. */
00749       if (HasBit(spec->callback_mask, CBM_OBJ_AUTOSLOPE)) {
00750         /* If the callback fails, allow autoslope. */
00751         uint16 res = GetObjectCallback(CBID_OBJECT_AUTOSLOPE, 0, 0, spec, Object::GetByTile(tile), tile);
00752         if (res == CALLBACK_FAILED || !ConvertBooleanCallback(spec->grf_prop.grffile, CBID_OBJECT_AUTOSLOPE, res)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00753       } else if (spec->enabled) {
00754         /* allow autoslope */
00755         return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00756       }
00757     }
00758   }
00759 
00760   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00761 }
00762 
00763 extern const TileTypeProcs _tile_type_object_procs = {
00764   DrawTile_Object,             // draw_tile_proc
00765   GetSlopePixelZ_Object,       // get_slope_z_proc
00766   ClearTile_Object,            // clear_tile_proc
00767   AddAcceptedCargo_Object,     // add_accepted_cargo_proc
00768   GetTileDesc_Object,          // get_tile_desc_proc
00769   GetTileTrackStatus_Object,   // get_tile_track_status_proc
00770   ClickTile_Object,            // click_tile_proc
00771   AnimateTile_Object,          // animate_tile_proc
00772   TileLoop_Object,             // tile_loop_proc
00773   ChangeTileOwner_Object,      // change_tile_owner_proc
00774   NULL,                        // add_produced_cargo_proc
00775   NULL,                        // vehicle_enter_tile_proc
00776   GetFoundation_Object,        // get_foundation_proc
00777   TerraformTile_Object,        // terraform_tile_proc
00778 };