object_cmd.cpp

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00001 /* $Id$ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "landscape.h"
00014 #include "command_func.h"
00015 #include "viewport_func.h"
00016 #include "company_base.h"
00017 #include "town.h"
00018 #include "bridge_map.h"
00019 #include "genworld.h"
00020 #include "autoslope.h"
00021 #include "clear_func.h"
00022 #include "water.h"
00023 #include "window_func.h"
00024 #include "company_gui.h"
00025 #include "cheat_type.h"
00026 #include "object.h"
00027 #include "cargopacket.h"
00028 #include "sprite.h"
00029 #include "core/random_func.hpp"
00030 #include "core/pool_func.hpp"
00031 #include "object_map.h"
00032 #include "object_base.h"
00033 #include "newgrf_config.h"
00034 #include "newgrf_object.h"
00035 #include "date_func.h"
00036 #include "newgrf_debug.h"
00037 
00038 #include "table/strings.h"
00039 #include "table/object_land.h"
00040 
00041 ObjectPool _object_pool("Object");
00042 INSTANTIATE_POOL_METHODS(Object)
00043 uint16 Object::counts[NUM_OBJECTS];
00044 
00050 /* static */ Object *Object::GetByTile(TileIndex tile)
00051 {
00052   return Object::Get(GetObjectIndex(tile));
00053 }
00054 
00056 void InitializeObjects()
00057 {
00058   Object::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) o->colour = GB(res, 0, 8);
00097   }
00098 
00099   assert(o->town != NULL);
00100 
00101   TILE_AREA_LOOP(t, ta) {
00102     WaterClass wc = (IsWaterTile(t) ? GetWaterClass(t) : WATER_CLASS_INVALID);
00103     /* Update company infrastructure counts for objects build on canals owned by nobody. */
00104     if (wc == WATER_CLASS_CANAL && owner != OWNER_NONE && (IsTileOwner(tile, OWNER_NONE) || IsTileOwner(tile, OWNER_WATER))) {
00105       Company::Get(owner)->water_infrastructure++;
00106       DirtyCompanyInfrastructureWindows(owner);
00107     }
00108     MakeObject(t, type, owner, o->index, wc, Random());
00109     MarkTileDirtyByTile(t);
00110   }
00111 
00112   Object::IncTypeCount(type);
00113   if (spec->flags & OBJECT_FLAG_ANIMATION) TriggerObjectAnimation(o, OAT_BUILT, spec);
00114 }
00115 
00120 static void IncreaseAnimationStage(TileIndex tile)
00121 {
00122   TileArea ta = Object::GetByTile(tile)->location;
00123   TILE_AREA_LOOP(t, ta) {
00124     SetAnimationFrame(t, GetAnimationFrame(t) + 1);
00125     MarkTileDirtyByTile(t);
00126   }
00127 }
00128 
00130 #define GetCompanyHQSize GetAnimationFrame
00131 
00132 #define IncreaseCompanyHQSize IncreaseAnimationStage
00133 
00139 void UpdateCompanyHQ(TileIndex tile, uint score)
00140 {
00141   if (tile == INVALID_TILE) return;
00142 
00143   byte val;
00144   (val = 0, score < 170) ||
00145   (val++, score < 350) ||
00146   (val++, score < 520) ||
00147   (val++, score < 720) ||
00148   (val++, true);
00149 
00150   while (GetCompanyHQSize(tile) < val) {
00151     IncreaseCompanyHQSize(tile);
00152   }
00153 }
00154 
00159 void UpdateObjectColours(const Company *c)
00160 {
00161   Object *obj;
00162   FOR_ALL_OBJECTS(obj) {
00163     Owner owner = GetTileOwner(obj->location.tile);
00164     /* Not the current owner, so colour doesn't change. */
00165     if (owner != c->index) continue;
00166 
00167     const ObjectSpec *spec = ObjectSpec::GetByTile(obj->location.tile);
00168     /* Using the object colour callback, so not using company colour. */
00169     if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) continue;
00170 
00171     const Livery *l = c->livery;
00172     obj->colour = ((spec->flags & OBJECT_FLAG_2CC_COLOUR) ? (l->colour2 * 16) : 0) + l->colour1;
00173   }
00174 }
00175 
00176 extern CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool check_bridge);
00177 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags);
00178 
00188 CommandCost CmdBuildObject(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00189 {
00190   CommandCost cost(EXPENSES_PROPERTY);
00191 
00192   ObjectType type = (ObjectType)GB(p1, 0, 8);
00193   uint8 view = GB(p2, 0, 2);
00194   const ObjectSpec *spec = ObjectSpec::Get(type);
00195   if (!spec->IsAvailable()) return CMD_ERROR;
00196 
00197   if (spec->flags & OBJECT_FLAG_ONLY_IN_SCENEDIT && (_game_mode != GM_EDITOR || _current_company != OWNER_NONE)) return CMD_ERROR;
00198   if (spec->flags & OBJECT_FLAG_ONLY_IN_GAME && (_game_mode != GM_NORMAL || _current_company > MAX_COMPANIES)) return CMD_ERROR;
00199   if (view >= spec->views) return CMD_ERROR;
00200 
00201   if (!Object::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_OBJECTS);
00202   if (Town::GetNumItems() == 0) return_cmd_error(STR_ERROR_MUST_FOUND_TOWN_FIRST);
00203 
00204   int size_x = GB(spec->size, HasBit(view, 0) ? 4 : 0, 4);
00205   int size_y = GB(spec->size, HasBit(view, 0) ? 0 : 4, 4);
00206   TileArea ta(tile, size_x, size_y);
00207 
00208   if (type == OBJECT_OWNED_LAND) {
00209     /* Owned land is special as it can be placed on any slope. */
00210     cost.AddCost(DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
00211   } else {
00212     /* Check the surface to build on. */
00213     bool allow_water = (spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0;
00214     bool allow_ground = (spec->flags & OBJECT_FLAG_NOT_ON_LAND) == 0;
00215     TILE_AREA_LOOP(t, ta) {
00216       if (HasTileWaterGround(t)) {
00217         if (!allow_water) return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00218         if (!IsWaterTile(t)) {
00219           /* Normal water tiles don't have to be cleared. For all other tile types clear
00220            * the tile but leave the water. */
00221           cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_NO_WATER, CMD_LANDSCAPE_CLEAR));
00222         } else {
00223           /* Can't build on water owned by another company. */
00224           Owner o = GetTileOwner(t);
00225           if (o != OWNER_NONE && o != OWNER_WATER) cost.AddCost(CheckOwnership(o, t));
00226         }
00227       } else {
00228         if (!allow_ground) return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
00229         /* For non-water tiles, we'll have to clear it before building. */
00230         cost.AddCost(DoCommand(t, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
00231       }
00232     }
00233 
00234     /* So, now the surface is checked... check the slope of said surface. */
00235     int allowed_z;
00236     if (GetTileSlope(tile, (uint*)&allowed_z) != SLOPE_FLAT) allowed_z += TILE_HEIGHT;
00237 
00238     TILE_AREA_LOOP(t, ta) {
00239       uint16 callback = CALLBACK_FAILED;
00240       if (HasBit(spec->callback_mask, CBM_OBJ_SLOPE_CHECK)) {
00241         TileIndex diff = t - tile;
00242         callback = GetObjectCallback(CBID_OBJECT_LAND_SLOPE_CHECK, GetTileSlope(t, NULL), TileY(diff) << 4 | TileX(diff), spec, NULL, t, view);
00243       }
00244 
00245       if (callback == CALLBACK_FAILED) {
00246         cost.AddCost(CheckBuildableTile(t, 0, allowed_z, false));
00247       } else if (callback != 0) {
00248         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
00249       }
00250     }
00251   }
00252   if (cost.Failed()) return cost;
00253 
00254   /* Finally do a check for bridges. */
00255   TILE_AREA_LOOP(t, ta) {
00256     if (MayHaveBridgeAbove(t) && IsBridgeAbove(t) && (
00257         !(spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) ||
00258         (GetTileMaxZ(t) + spec->height * TILE_HEIGHT >= GetBridgeHeight(GetSouthernBridgeEnd(t))))) {
00259       return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00260     }
00261   }
00262 
00263   int hq_score = 0;
00264   switch (type) {
00265     case OBJECT_TRANSMITTER:
00266     case OBJECT_LIGHTHOUSE:
00267       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00268       break;
00269 
00270     case OBJECT_OWNED_LAND:
00271       if (IsTileType(tile, MP_OBJECT) &&
00272           IsTileOwner(tile, _current_company) &&
00273           IsOwnedLand(tile)) {
00274         return_cmd_error(STR_ERROR_YOU_ALREADY_OWN_IT);
00275       }
00276       break;
00277 
00278     case OBJECT_HQ: {
00279       Company *c = Company::Get(_current_company);
00280       if (c->location_of_HQ != INVALID_TILE) {
00281         /* We need to persuade a bit harder to remove the old HQ. */
00282         _current_company = OWNER_WATER;
00283         cost.AddCost(ClearTile_Object(c->location_of_HQ, flags));
00284         _current_company = c->index;
00285       }
00286 
00287       if (flags & DC_EXEC) {
00288         hq_score = UpdateCompanyRatingAndValue(c, false);
00289         c->location_of_HQ = tile;
00290         SetWindowDirty(WC_COMPANY, c->index);
00291       }
00292       break;
00293     }
00294 
00295     case OBJECT_STATUE:
00296       /* This may never be constructed using this method. */
00297       return CMD_ERROR;
00298 
00299     default: // i.e. NewGRF provided.
00300       break;
00301   }
00302 
00303   if (flags & DC_EXEC) {
00304     BuildObject(type, tile, _current_company, NULL, view);
00305 
00306     /* Make sure the HQ starts at the right size. */
00307     if (type == OBJECT_HQ) UpdateCompanyHQ(tile, hq_score);
00308   }
00309 
00310   cost.AddCost(ObjectSpec::Get(type)->GetBuildCost() * size_x * size_y);
00311   return cost;
00312 }
00313 
00314 
00315 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh);
00316 
00317 static void DrawTile_Object(TileInfo *ti)
00318 {
00319   ObjectType type = GetObjectType(ti->tile);
00320   const ObjectSpec *spec = ObjectSpec::Get(type);
00321 
00322   /* Fall back for when the object doesn't exist anymore. */
00323   if (!spec->enabled) type = OBJECT_TRANSMITTER;
00324 
00325   if ((spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) == 0) DrawFoundation(ti, GetFoundation_Object(ti->tile, ti->tileh));
00326 
00327   if (type < NEW_OBJECT_OFFSET) {
00328     const DrawTileSprites *dts = NULL;
00329     Owner to = GetTileOwner(ti->tile);
00330     PaletteID palette = to == OWNER_NONE ? PAL_NONE : COMPANY_SPRITE_COLOUR(to);
00331 
00332     if (type == OBJECT_HQ) {
00333       TileIndex diff = ti->tile - Object::GetByTile(ti->tile)->location.tile;
00334       dts = &_object_hq[GetCompanyHQSize(ti->tile) << 2 | TileY(diff) << 1 | TileX(diff)];
00335     } else {
00336       dts = &_objects[type];
00337     }
00338 
00339     if (spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) {
00340       /* If an object has no foundation, but tries to draw a (flat) ground
00341        * type... we have to be nice and convert that for them. */
00342       switch (dts->ground.sprite) {
00343         case SPR_FLAT_BARE_LAND:          DrawClearLandTile(ti, 0); break;
00344         case SPR_FLAT_1_THIRD_GRASS_TILE: DrawClearLandTile(ti, 1); break;
00345         case SPR_FLAT_2_THIRD_GRASS_TILE: DrawClearLandTile(ti, 2); break;
00346         case SPR_FLAT_GRASS_TILE:         DrawClearLandTile(ti, 3); break;
00347         default: DrawGroundSprite(dts->ground.sprite, palette);     break;
00348       }
00349     } else {
00350       DrawGroundSprite(dts->ground.sprite, palette);
00351     }
00352 
00353     if (!IsInvisibilitySet(TO_STRUCTURES)) {
00354       const DrawTileSeqStruct *dtss;
00355       foreach_draw_tile_seq(dtss, dts->seq) {
00356         AddSortableSpriteToDraw(
00357           dtss->image.sprite, palette,
00358           ti->x + dtss->delta_x, ti->y + dtss->delta_y,
00359           dtss->size_x, dtss->size_y,
00360           dtss->size_z, ti->z + dtss->delta_z,
00361           IsTransparencySet(TO_STRUCTURES)
00362         );
00363       }
00364     }
00365   } else {
00366     DrawNewObjectTile(ti, spec);
00367   }
00368 
00369   if (spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) DrawBridgeMiddle(ti);
00370 }
00371 
00372 static uint GetSlopeZ_Object(TileIndex tile, uint x, uint y)
00373 {
00374   if (IsOwnedLand(tile)) {
00375     uint z;
00376     Slope tileh = GetTileSlope(tile, &z);
00377 
00378     return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
00379   } else {
00380     return GetTileMaxZ(tile);
00381   }
00382 }
00383 
00384 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh)
00385 {
00386   return IsOwnedLand(tile) ? FOUNDATION_NONE : FlatteningFoundation(tileh);
00387 }
00388 
00393 static void ReallyClearObjectTile(Object *o)
00394 {
00395   Object::DecTypeCount(GetObjectType(o->location.tile));
00396   TILE_AREA_LOOP(tile_cur, o->location) {
00397     DeleteNewGRFInspectWindow(GSF_OBJECTS, tile_cur);
00398 
00399     MakeWaterKeepingClass(tile_cur, GetTileOwner(tile_cur));
00400   }
00401   delete o;
00402 }
00403 
00404 SmallVector<ClearedObjectArea, 4> _cleared_object_areas;
00405 
00411 ClearedObjectArea *FindClearedObject(TileIndex tile)
00412 {
00413   TileArea ta = TileArea(tile, 1, 1);
00414 
00415   const ClearedObjectArea *end = _cleared_object_areas.End();
00416   for (ClearedObjectArea *coa = _cleared_object_areas.Begin(); coa != end; coa++) {
00417     if (coa->area.Intersects(ta)) return coa;
00418   }
00419 
00420   return NULL;
00421 }
00422 
00423 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags)
00424 {
00425   ObjectType type = GetObjectType(tile);
00426   const ObjectSpec *spec = ObjectSpec::Get(type);
00427 
00428   /* Get to the northern most tile. */
00429   Object *o = Object::GetByTile(tile);
00430   TileArea ta = o->location;
00431 
00432   ClearedObjectArea *cleared_area = _cleared_object_areas.Append();
00433   cleared_area->first_tile = tile;
00434   cleared_area->area = ta;
00435 
00436   CommandCost cost(EXPENSES_CONSTRUCTION, spec->GetClearCost() * ta.w * ta.h / 5);
00437   if (spec->flags & OBJECT_FLAG_CLEAR_INCOME) cost.MultiplyCost(-1); // They get an income!
00438 
00439   /* Water can remove everything! */
00440   if (_current_company != OWNER_WATER) {
00441     if ((flags & DC_NO_WATER) && IsTileOnWater(tile)) {
00442       /* There is water under the object, treat it as water tile. */
00443       return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00444     } else if (!(spec->flags & OBJECT_FLAG_AUTOREMOVE) && (flags & DC_AUTO)) {
00445       /* No automatic removal by overbuilding stuff. */
00446       return_cmd_error(type == OBJECT_HQ ? STR_ERROR_COMPANY_HEADQUARTERS_IN : STR_ERROR_OBJECT_IN_THE_WAY);
00447     } else if (_game_mode == GM_EDITOR) {
00448       /* No further limitations for the editor. */
00449     } else if (GetTileOwner(tile) == OWNER_NONE) {
00450       /* Owned by nobody, so we can only remove it with brute force! */
00451       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00452     } else if (CheckTileOwnership(tile).Failed()) {
00453       /* We don't own it!. */
00454       return_cmd_error(STR_ERROR_OWNED_BY);
00455     } else if ((spec->flags & OBJECT_FLAG_CANNOT_REMOVE) != 0 && (spec->flags & OBJECT_FLAG_AUTOREMOVE) == 0) {
00456       /* In the game editor or with cheats we can remove, otherwise we can't. */
00457       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00458 
00459       /* Removing with the cheat costs more in TTDPatch / the specs. */
00460       cost.MultiplyCost(25);
00461     }
00462   } else if ((spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0) {
00463     /* Water can't remove objects that are buildable on water. */
00464     return CMD_ERROR;
00465   }
00466 
00467   switch (type) {
00468     case OBJECT_HQ: {
00469       Company *c = Company::Get(GetTileOwner(tile));
00470       if (flags & DC_EXEC) {
00471         c->location_of_HQ = INVALID_TILE; // reset HQ position
00472         SetWindowDirty(WC_COMPANY, c->index);
00473         CargoPacket::InvalidateAllFrom(ST_HEADQUARTERS, c->index);
00474       }
00475 
00476       /* cost of relocating company is 1% of company value */
00477       cost = CommandCost(EXPENSES_PROPERTY, CalculateCompanyValue(c) / 100);
00478       break;
00479     }
00480 
00481     case OBJECT_STATUE:
00482       if (flags & DC_EXEC) {
00483         Town *town = o->town;
00484         ClrBit(town->statues, GetTileOwner(tile));
00485         SetWindowDirty(WC_TOWN_AUTHORITY, town->index);
00486       }
00487       break;
00488 
00489     default:
00490       break;
00491   }
00492 
00493   if (flags & DC_EXEC) ReallyClearObjectTile(o);
00494 
00495   return cost;
00496 }
00497 
00498 static void AddAcceptedCargo_Object(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted)
00499 {
00500   if (!IsCompanyHQ(tile)) return;
00501 
00502   /* HQ accepts passenger and mail; but we have to divide the values
00503    * between 4 tiles it occupies! */
00504 
00505   /* HQ level (depends on company performance) in the range 1..5. */
00506   uint level = GetCompanyHQSize(tile) + 1;
00507 
00508   /* Top town building generates 10, so to make HQ interesting, the top
00509    * type makes 20. */
00510   acceptance[CT_PASSENGERS] += max(1U, level);
00511   SetBit(*always_accepted, CT_PASSENGERS);
00512 
00513   /* Top town building generates 4, HQ can make up to 8. The
00514    * proportion passengers:mail is different because such a huge
00515    * commercial building generates unusually high amount of mail
00516    * correspondence per physical visitor. */
00517   acceptance[CT_MAIL] += max(1U, level / 2);
00518   SetBit(*always_accepted, CT_MAIL);
00519 }
00520 
00521 
00522 static void GetTileDesc_Object(TileIndex tile, TileDesc *td)
00523 {
00524   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00525   td->str = spec->name;
00526   td->owner[0] = GetTileOwner(tile);
00527   td->build_date = Object::GetByTile(tile)->build_date;
00528 
00529   if (spec->grf_prop.grffile != NULL) {
00530     td->grf = GetGRFConfig(spec->grf_prop.grffile->grfid)->GetName();
00531   }
00532 }
00533 
00534 static void TileLoop_Object(TileIndex tile)
00535 {
00536   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00537   if (spec->flags & OBJECT_FLAG_ANIMATION) {
00538     const Object *o = Object::GetByTile(tile);
00539     TriggerObjectTileAnimation(o, tile, OAT_TILELOOP, spec);
00540     if (o->location.tile == tile) TriggerObjectAnimation(o, OAT_256_TICKS, spec);
00541   }
00542 
00543   if (IsTileOnWater(tile)) TileLoop_Water(tile);
00544 
00545   if (!IsCompanyHQ(tile)) return;
00546 
00547   /* HQ accepts passenger and mail; but we have to divide the values
00548    * between 4 tiles it occupies! */
00549 
00550   /* HQ level (depends on company performance) in the range 1..5. */
00551   uint level = GetCompanyHQSize(tile) + 1;
00552   assert(level < 6);
00553 
00554   StationFinder stations(TileArea(tile, 2, 2));
00555 
00556   uint r = Random();
00557   /* Top town buildings generate 250, so the top HQ type makes 256. */
00558   if (GB(r, 0, 8) < (256 / 4 / (6 - level))) {
00559     uint amt = GB(r, 0, 8) / 8 / 4 + 1;
00560     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00561     MoveGoodsToStation(CT_PASSENGERS, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00562   }
00563 
00564   /* Top town building generates 90, HQ can make up to 196. The
00565    * proportion passengers:mail is about the same as in the acceptance
00566    * equations. */
00567   if (GB(r, 8, 8) < (196 / 4 / (6 - level))) {
00568     uint amt = GB(r, 8, 8) / 8 / 4 + 1;
00569     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00570     MoveGoodsToStation(CT_MAIL, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00571   }
00572 }
00573 
00574 
00575 static TrackStatus GetTileTrackStatus_Object(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
00576 {
00577   return 0;
00578 }
00579 
00580 static bool ClickTile_Object(TileIndex tile)
00581 {
00582   if (!IsCompanyHQ(tile)) return false;
00583 
00584   ShowCompany(GetTileOwner(tile));
00585   return true;
00586 }
00587 
00588 static void AnimateTile_Object(TileIndex tile)
00589 {
00590   AnimateNewObjectTile(tile);
00591 }
00592 
00599 static bool HasTransmitter(TileIndex tile, void *user)
00600 {
00601   return IsTransmitterTile(tile);
00602 }
00603 
00604 void GenerateObjects()
00605 {
00606   if (_settings_game.game_creation.landscape == LT_TOYLAND) return;
00607 
00608   /* add radio tower */
00609   int radiotower_to_build = ScaleByMapSize(15); // maximum number of radio towers on the map
00610   int lighthouses_to_build = _settings_game.game_creation.landscape == LT_TROPIC ? 0 : ScaleByMapSize1D((Random() & 3) + 7);
00611 
00612   /* Scale the amount of lighthouses with the amount of land at the borders. */
00613   if (_settings_game.construction.freeform_edges && lighthouses_to_build != 0) {
00614     uint num_water_tiles = 0;
00615     for (uint x = 0; x < MapMaxX(); x++) {
00616       if (IsTileType(TileXY(x, 1), MP_WATER)) num_water_tiles++;
00617       if (IsTileType(TileXY(x, MapMaxY() - 1), MP_WATER)) num_water_tiles++;
00618     }
00619     for (uint y = 1; y < MapMaxY() - 1; y++) {
00620       if (IsTileType(TileXY(1, y), MP_WATER)) num_water_tiles++;
00621       if (IsTileType(TileXY(MapMaxX() - 1, y), MP_WATER)) num_water_tiles++;
00622     }
00623     /* The -6 is because the top borders are MP_VOID (-2) and all corners
00624      * are counted twice (-4). */
00625     lighthouses_to_build = lighthouses_to_build * num_water_tiles / (2 * MapMaxY() + 2 * MapMaxX() - 6);
00626   }
00627 
00628   SetGeneratingWorldProgress(GWP_OBJECT, radiotower_to_build + lighthouses_to_build);
00629 
00630   for (uint i = ScaleByMapSize(1000); i != 0 && Object::CanAllocateItem(); i--) {
00631     TileIndex tile = RandomTile();
00632 
00633     uint h;
00634     if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h >= TILE_HEIGHT * 4 && !IsBridgeAbove(tile)) {
00635       TileIndex t = tile;
00636       if (CircularTileSearch(&t, 9, HasTransmitter, NULL)) continue;
00637 
00638       BuildObject(OBJECT_TRANSMITTER, tile);
00639       IncreaseGeneratingWorldProgress(GWP_OBJECT);
00640       if (--radiotower_to_build == 0) break;
00641     }
00642   }
00643 
00644   /* add lighthouses */
00645   uint maxx = MapMaxX();
00646   uint maxy = MapMaxY();
00647   for (int loop_count = 0; loop_count < 1000 && lighthouses_to_build != 0 && Object::CanAllocateItem(); loop_count++) {
00648     uint r = Random();
00649 
00650     /* Scatter the lighthouses more evenly around the perimeter */
00651     int perimeter = (GB(r, 16, 16) % (2 * (maxx + maxy))) - maxy;
00652     DiagDirection dir;
00653     for (dir = DIAGDIR_NE; perimeter > 0; dir++) {
00654       perimeter -= (DiagDirToAxis(dir) == AXIS_X) ? maxx : maxy;
00655     }
00656 
00657     TileIndex tile;
00658     switch (dir) {
00659       default:
00660       case DIAGDIR_NE: tile = TileXY(maxx - 1, r % maxy); break;
00661       case DIAGDIR_SE: tile = TileXY(r % maxx, 1); break;
00662       case DIAGDIR_SW: tile = TileXY(1,        r % maxy); break;
00663       case DIAGDIR_NW: tile = TileXY(r % maxx, maxy - 1); break;
00664     }
00665 
00666     /* Only build lighthouses at tiles where the border is sea. */
00667     if (!IsTileType(tile, MP_WATER)) continue;
00668 
00669     for (int j = 0; j < 19; j++) {
00670       uint h;
00671       if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h <= TILE_HEIGHT * 2 && !IsBridgeAbove(tile)) {
00672         BuildObject(OBJECT_LIGHTHOUSE, tile);
00673         IncreaseGeneratingWorldProgress(GWP_OBJECT);
00674         lighthouses_to_build--;
00675         assert(tile < MapSize());
00676         break;
00677       }
00678       tile = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDiagDir(dir));
00679       if (tile == INVALID_TILE) break;
00680     }
00681   }
00682 }
00683 
00684 static void ChangeTileOwner_Object(TileIndex tile, Owner old_owner, Owner new_owner)
00685 {
00686   if (!IsTileOwner(tile, old_owner)) return;
00687 
00688   if (IsOwnedLand(tile) && new_owner != INVALID_OWNER) {
00689     SetTileOwner(tile, new_owner);
00690   } else if (IsStatueTile(tile)) {
00691     Town *t = Object::GetByTile(tile)->town;
00692     ClrBit(t->statues, old_owner);
00693     if (new_owner != INVALID_OWNER && !HasBit(t->statues, new_owner)) {
00694       /* Transfer ownership to the new company */
00695       SetBit(t->statues, new_owner);
00696       SetTileOwner(tile, new_owner);
00697     } else {
00698       ReallyClearObjectTile(Object::GetByTile(tile));
00699     }
00700 
00701     SetWindowDirty(WC_TOWN_AUTHORITY, t->index);
00702   } else {
00703     ReallyClearObjectTile(Object::GetByTile(tile));
00704   }
00705 }
00706 
00707 static CommandCost TerraformTile_Object(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
00708 {
00709   ObjectType type = GetObjectType(tile);
00710 
00711   if (type == OBJECT_OWNED_LAND) {
00712     /* Owned land remains unsold */
00713     CommandCost ret = CheckTileOwnership(tile);
00714     if (ret.Succeeded()) return CommandCost();
00715   } else if (AutoslopeEnabled() && type != OBJECT_TRANSMITTER && type != OBJECT_LIGHTHOUSE) {
00716     /* Behaviour:
00717      *  - Both new and old slope must not be steep.
00718      *  - TileMaxZ must not be changed.
00719      *  - Allow autoslope by default.
00720      *  - Disallow autoslope if callback succeeds and returns non-zero.
00721      */
00722     Slope tileh_old = GetTileSlope(tile, NULL);
00723     /* TileMaxZ must not be changed. Slopes must not be steep. */
00724     if (!IsSteepSlope(tileh_old) && !IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
00725       const ObjectSpec *spec = ObjectSpec::Get(type);
00726 
00727       /* Call callback 'disable autosloping for objects'. */
00728       if (HasBit(spec->callback_mask, CBM_OBJ_AUTOSLOPE)) {
00729         /* If the callback fails, allow autoslope. */
00730         uint16 res = GetObjectCallback(CBID_OBJECT_AUTOSLOPE, 0, 0, spec, Object::GetByTile(tile), tile);
00731         if ((res == 0) || (res == CALLBACK_FAILED)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00732       } else if (spec->enabled) {
00733         /* allow autoslope */
00734         return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00735       }
00736     }
00737   }
00738 
00739   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00740 }
00741 
00742 extern const TileTypeProcs _tile_type_object_procs = {
00743   DrawTile_Object,             // draw_tile_proc
00744   GetSlopeZ_Object,            // get_slope_z_proc
00745   ClearTile_Object,            // clear_tile_proc
00746   AddAcceptedCargo_Object,     // add_accepted_cargo_proc
00747   GetTileDesc_Object,          // get_tile_desc_proc
00748   GetTileTrackStatus_Object,   // get_tile_track_status_proc
00749   ClickTile_Object,            // click_tile_proc
00750   AnimateTile_Object,          // animate_tile_proc
00751   TileLoop_Object,             // tile_loop_clear
00752   ChangeTileOwner_Object,      // change_tile_owner_clear
00753   NULL,                        // add_produced_cargo_proc
00754   NULL,                        // vehicle_enter_tile_proc
00755   GetFoundation_Object,        // get_foundation_proc
00756   TerraformTile_Object,        // terraform_tile_proc
00757 };