object_cmd.cpp

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00001 /* $Id: object_cmd.cpp 22033 2011-02-08 21:49:39Z smatz $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "landscape.h"
00014 #include "command_func.h"
00015 #include "viewport_func.h"
00016 #include "company_base.h"
00017 #include "town.h"
00018 #include "bridge_map.h"
00019 #include "genworld.h"
00020 #include "autoslope.h"
00021 #include "clear_func.h"
00022 #include "water.h"
00023 #include "window_func.h"
00024 #include "company_gui.h"
00025 #include "cheat_type.h"
00026 #include "object.h"
00027 #include "cargopacket.h"
00028 #include "sprite.h"
00029 #include "core/random_func.hpp"
00030 #include "core/pool_func.hpp"
00031 #include "object_map.h"
00032 #include "object_base.h"
00033 #include "newgrf_config.h"
00034 #include "newgrf_object.h"
00035 #include "date_func.h"
00036 #include "newgrf_debug.h"
00037 
00038 #include "table/strings.h"
00039 #include "table/object_land.h"
00040 
00041 ObjectPool _object_pool("Object");
00042 INSTANTIATE_POOL_METHODS(Object)
00043 uint16 Object::counts[NUM_OBJECTS];
00044 
00050 /* static */ Object *Object::GetByTile(TileIndex tile)
00051 {
00052   return Object::Get(GetObjectIndex(tile));
00053 }
00054 
00056 void InitializeObjects()
00057 {
00058   _object_pool.CleanPool();
00059   Object::ResetTypeCounts();
00060 }
00061 
00072 void BuildObject(ObjectType type, TileIndex tile, CompanyID owner, Town *town, uint8 view)
00073 {
00074   const ObjectSpec *spec = ObjectSpec::Get(type);
00075 
00076   TileArea ta(tile, GB(spec->size, HasBit(view, 0) ? 4 : 0, 4), GB(spec->size, HasBit(view, 0) ? 0 : 4, 4));
00077   Object *o = new Object();
00078   o->location      = ta;
00079   o->town          = town == NULL ? CalcClosestTownFromTile(tile) : town;
00080   o->build_date    = _date;
00081   o->view          = view;
00082 
00083   /* If nothing owns the object, the colour will be random. Otherwise
00084    * get the colour from the company's livery settings. */
00085   if (owner == OWNER_NONE) {
00086     o->colour = Random();
00087   } else {
00088     const Livery *l = Company::Get(owner)->livery;
00089     o->colour = l->colour1 + l->colour2 * 16;
00090   }
00091 
00092   /* If the object wants only one colour, then give it that colour. */
00093   if ((spec->flags & OBJECT_FLAG_2CC_COLOUR) == 0) o->colour &= 0xF;
00094 
00095   if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) {
00096     uint16 res = GetObjectCallback(CBID_OBJECT_COLOUR, o->colour, 0, spec, o, tile);
00097     if (res != CALLBACK_FAILED) o->colour = GB(res, 0, 8);
00098   }
00099 
00100   assert(o->town != NULL);
00101 
00102   TILE_AREA_LOOP(t, ta) {
00103     WaterClass wc = (IsWaterTile(t) ? GetWaterClass(t) : WATER_CLASS_INVALID);
00104     MakeObject(t, type, owner, o->index, wc, Random());
00105     MarkTileDirtyByTile(t);
00106   }
00107 
00108   Object::IncTypeCount(type);
00109   if (spec->flags & OBJECT_FLAG_ANIMATION) TriggerObjectAnimation(o, OAT_BUILT, spec);
00110 }
00111 
00116 static void IncreaseAnimationStage(TileIndex tile)
00117 {
00118   TileArea ta = Object::GetByTile(tile)->location;
00119   TILE_AREA_LOOP(t, ta) {
00120     SetAnimationFrame(t, GetAnimationFrame(t) + 1);
00121     MarkTileDirtyByTile(t);
00122   }
00123 }
00124 
00126 #define GetCompanyHQSize GetAnimationFrame
00127 
00128 #define IncreaseCompanyHQSize IncreaseAnimationStage
00129 
00135 void UpdateCompanyHQ(TileIndex tile, uint score)
00136 {
00137   if (tile == INVALID_TILE) return;
00138 
00139   byte val;
00140   (val = 0, score < 170) ||
00141   (val++, score < 350) ||
00142   (val++, score < 520) ||
00143   (val++, score < 720) ||
00144   (val++, true);
00145 
00146   while (GetCompanyHQSize(tile) < val) {
00147     IncreaseCompanyHQSize(tile);
00148   }
00149 }
00150 
00155 void UpdateObjectColours(const Company *c)
00156 {
00157   Object *obj;
00158   FOR_ALL_OBJECTS(obj) {
00159     Owner owner = GetTileOwner(obj->location.tile);
00160     /* Not the current owner, so colour doesn't change. */
00161     if (owner != c->index) continue;
00162 
00163     const ObjectSpec *spec = ObjectSpec::GetByTile(obj->location.tile);
00164     /* Using the object colour callback, so not using company colour. */
00165     if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) continue;
00166 
00167     const Livery *l = c->livery;
00168     obj->colour = ((spec->flags & OBJECT_FLAG_2CC_COLOUR) ? (l->colour2 * 16) : 0) + l->colour1;
00169   }
00170 }
00171 
00172 extern CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool check_bridge);
00173 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags);
00174 
00184 CommandCost CmdBuildObject(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00185 {
00186   CommandCost cost(EXPENSES_PROPERTY);
00187 
00188   ObjectType type = (ObjectType)GB(p1, 0, 8);
00189   uint8 view = GB(p2, 0, 2);
00190   const ObjectSpec *spec = ObjectSpec::Get(type);
00191   if (!spec->IsAvailable()) return CMD_ERROR;
00192 
00193   if (spec->flags & OBJECT_FLAG_ONLY_IN_SCENEDIT && (_game_mode != GM_EDITOR || _current_company != OWNER_NONE)) return CMD_ERROR;
00194   if (spec->flags & OBJECT_FLAG_ONLY_IN_GAME && (_game_mode != GM_NORMAL || _current_company > MAX_COMPANIES)) return CMD_ERROR;
00195   if (view >= spec->views) return CMD_ERROR;
00196 
00197   if (!Object::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_OBJECTS);
00198   if (Town::GetNumItems() == 0) return_cmd_error(STR_ERROR_MUST_FOUND_TOWN_FIRST);
00199 
00200   int size_x = GB(spec->size, HasBit(view, 0) ? 4 : 0, 4);
00201   int size_y = GB(spec->size, HasBit(view, 0) ? 0 : 4, 4);
00202   TileArea ta(tile, size_x, size_y);
00203 
00204   if (type == OBJECT_OWNED_LAND) {
00205     /* Owned land is special as it can be placed on any slope. */
00206     cost.AddCost(DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
00207   } else {
00208     /* Check the surface to build on. */
00209     bool allow_water = (spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0;
00210     bool allow_ground = (spec->flags & OBJECT_FLAG_NOT_ON_LAND) == 0;
00211     TILE_AREA_LOOP(t, ta) {
00212       if (HasTileWaterGround(t)) {
00213         if (!allow_water) return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00214         if (!IsWaterTile(t)) {
00215           /* Normal water tiles don't have to be cleared. For all other tile types clear
00216            * the tile but leave the water. */
00217           cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_NO_WATER, CMD_LANDSCAPE_CLEAR));
00218         }
00219       } else {
00220         if (!allow_ground) return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
00221         /* For non-water tiles, we'll have to clear it before building. */
00222         cost.AddCost(DoCommand(t, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
00223       }
00224     }
00225 
00226     /* So, now the surface is checked... check the slope of said surface. */
00227     int allowed_z;
00228     if (GetTileSlope(tile, (uint*)&allowed_z) != SLOPE_FLAT) allowed_z += TILE_HEIGHT;
00229 
00230     TILE_AREA_LOOP(t, ta) {
00231       uint16 callback = CALLBACK_FAILED;
00232       if (HasBit(spec->callback_mask, CBM_OBJ_SLOPE_CHECK)) {
00233         TileIndex diff = t - tile;
00234         callback = GetObjectCallback(CBID_OBJECT_LAND_SLOPE_CHECK, GetTileSlope(t, NULL), TileY(diff) << 4 | TileX(diff), spec, NULL, t, view);
00235       }
00236 
00237       if (callback == CALLBACK_FAILED) {
00238         cost.AddCost(CheckBuildableTile(t, 0, allowed_z, false));
00239       } else if (callback != 0) {
00240         return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
00241       }
00242     }
00243   }
00244   if (cost.Failed()) return cost;
00245 
00246   /* Finally do a check for bridges. */
00247   TILE_AREA_LOOP(t, ta) {
00248     if (MayHaveBridgeAbove(t) && IsBridgeAbove(t) && (
00249         !(spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) ||
00250         (GetTileMaxZ(t) + spec->height * TILE_HEIGHT >= GetBridgeHeight(GetSouthernBridgeEnd(t))))) {
00251       return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00252     }
00253   }
00254 
00255   int hq_score = 0;
00256   switch (type) {
00257     case OBJECT_TRANSMITTER:
00258     case OBJECT_LIGHTHOUSE:
00259       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00260       break;
00261 
00262     case OBJECT_OWNED_LAND:
00263       if (IsTileType(tile, MP_OBJECT) &&
00264           IsTileOwner(tile, _current_company) &&
00265           IsOwnedLand(tile)) {
00266         return_cmd_error(STR_ERROR_YOU_ALREADY_OWN_IT);
00267       }
00268       break;
00269 
00270     case OBJECT_HQ: {
00271       Company *c = Company::Get(_current_company);
00272       if (c->location_of_HQ != INVALID_TILE) {
00273         /* We need to persuade a bit harder to remove the old HQ. */
00274         _current_company = OWNER_WATER;
00275         cost.AddCost(ClearTile_Object(c->location_of_HQ, flags));
00276         _current_company = c->index;
00277       }
00278 
00279       if (flags & DC_EXEC) {
00280         hq_score = UpdateCompanyRatingAndValue(c, false);
00281         c->location_of_HQ = tile;
00282         SetWindowDirty(WC_COMPANY, c->index);
00283       }
00284       break;
00285     }
00286 
00287     case OBJECT_STATUE:
00288       /* This may never be constructed using this method. */
00289       return CMD_ERROR;
00290 
00291     default: // i.e. NewGRF provided.
00292       break;
00293   }
00294 
00295   if (flags & DC_EXEC) {
00296     BuildObject(type, tile, _current_company, NULL, view);
00297 
00298     /* Make sure the HQ starts at the right size. */
00299     if (type == OBJECT_HQ) UpdateCompanyHQ(tile, hq_score);
00300   }
00301 
00302   cost.AddCost(ObjectSpec::Get(type)->GetBuildCost() * size_x * size_y);
00303   return cost;
00304 }
00305 
00306 
00307 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh);
00308 
00309 static void DrawTile_Object(TileInfo *ti)
00310 {
00311   ObjectType type = GetObjectType(ti->tile);
00312   const ObjectSpec *spec = ObjectSpec::Get(type);
00313 
00314   /* Fall back for when the object doesn't exist anymore. */
00315   if (!spec->enabled) type = OBJECT_TRANSMITTER;
00316 
00317   if ((spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) == 0) DrawFoundation(ti, GetFoundation_Object(ti->tile, ti->tileh));
00318 
00319   if (type < NEW_OBJECT_OFFSET) {
00320     const DrawTileSprites *dts = NULL;
00321     Owner to = GetTileOwner(ti->tile);
00322     PaletteID palette = to == OWNER_NONE ? PAL_NONE : COMPANY_SPRITE_COLOUR(to);
00323 
00324     if (type == OBJECT_HQ) {
00325       TileIndex diff = ti->tile - Object::GetByTile(ti->tile)->location.tile;
00326       dts = &_object_hq[GetCompanyHQSize(ti->tile) << 2 | TileY(diff) << 1 | TileX(diff)];
00327     } else {
00328       dts = &_objects[type];
00329     }
00330 
00331     if (spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) {
00332       /* If an object has no foundation, but tries to draw a (flat) ground
00333        * type... we have to be nice and convert that for them. */
00334       switch (dts->ground.sprite) {
00335         case SPR_FLAT_BARE_LAND:          DrawClearLandTile(ti, 0); break;
00336         case SPR_FLAT_1_THIRD_GRASS_TILE: DrawClearLandTile(ti, 1); break;
00337         case SPR_FLAT_2_THIRD_GRASS_TILE: DrawClearLandTile(ti, 2); break;
00338         case SPR_FLAT_GRASS_TILE:         DrawClearLandTile(ti, 3); break;
00339         default: DrawGroundSprite(dts->ground.sprite, palette);     break;
00340       }
00341     } else {
00342       DrawGroundSprite(dts->ground.sprite, palette);
00343     }
00344 
00345     if (!IsInvisibilitySet(TO_STRUCTURES)) {
00346       const DrawTileSeqStruct *dtss;
00347       foreach_draw_tile_seq(dtss, dts->seq) {
00348         AddSortableSpriteToDraw(
00349           dtss->image.sprite, palette,
00350           ti->x + dtss->delta_x, ti->y + dtss->delta_y,
00351           dtss->size_x, dtss->size_y,
00352           dtss->size_z, ti->z + dtss->delta_z,
00353           IsTransparencySet(TO_STRUCTURES)
00354         );
00355       }
00356     }
00357   } else {
00358     DrawNewObjectTile(ti, spec);
00359   }
00360 
00361   if (spec->flags & OBJECT_FLAG_ALLOW_UNDER_BRIDGE) DrawBridgeMiddle(ti);
00362 }
00363 
00364 static uint GetSlopeZ_Object(TileIndex tile, uint x, uint y)
00365 {
00366   if (IsOwnedLand(tile)) {
00367     uint z;
00368     Slope tileh = GetTileSlope(tile, &z);
00369 
00370     return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
00371   } else {
00372     return GetTileMaxZ(tile);
00373   }
00374 }
00375 
00376 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh)
00377 {
00378   return IsOwnedLand(tile) ? FOUNDATION_NONE : FlatteningFoundation(tileh);
00379 }
00380 
00385 static void ReallyClearObjectTile(Object *o)
00386 {
00387   Object::DecTypeCount(GetObjectType(o->location.tile));
00388   TILE_AREA_LOOP(tile_cur, o->location) {
00389     DeleteNewGRFInspectWindow(GSF_OBJECTS, tile_cur);
00390 
00391     MakeWaterKeepingClass(tile_cur, GetTileOwner(tile_cur));
00392   }
00393   delete o;
00394 }
00395 
00396 SmallVector<ClearedObjectArea, 4> _cleared_object_areas;
00397 
00403 ClearedObjectArea *FindClearedObject(TileIndex tile)
00404 {
00405   TileArea ta = TileArea(tile, 1, 1);
00406 
00407   const ClearedObjectArea *end = _cleared_object_areas.End();
00408   for (ClearedObjectArea *coa = _cleared_object_areas.Begin(); coa != end; coa++) {
00409     if (coa->area.Intersects(ta)) return coa;
00410   }
00411 
00412   return NULL;
00413 }
00414 
00415 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags)
00416 {
00417   ObjectType type = GetObjectType(tile);
00418   const ObjectSpec *spec = ObjectSpec::Get(type);
00419 
00420   /* Get to the northern most tile. */
00421   Object *o = Object::GetByTile(tile);
00422   TileArea ta = o->location;
00423 
00424   ClearedObjectArea *cleared_area = _cleared_object_areas.Append();
00425   cleared_area->first_tile = tile;
00426   cleared_area->area = ta;
00427 
00428   CommandCost cost(EXPENSES_CONSTRUCTION, spec->GetClearCost() * ta.w * ta.h / 5);
00429   if (spec->flags & OBJECT_FLAG_CLEAR_INCOME) cost.MultiplyCost(-1); // They get an income!
00430 
00431   /* Water can remove everything! */
00432   if (_current_company != OWNER_WATER) {
00433     if ((flags & DC_NO_WATER) && IsTileOnWater(tile)) {
00434       /* There is water under the object, treat it as water tile. */
00435       return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00436     } else if (!(spec->flags & OBJECT_FLAG_AUTOREMOVE) && (flags & DC_AUTO)) {
00437       /* No automatic removal by overbuilding stuff. */
00438       return_cmd_error(type == OBJECT_HQ ? STR_ERROR_COMPANY_HEADQUARTERS_IN : STR_ERROR_OBJECT_IN_THE_WAY);
00439     } else if (_game_mode == GM_EDITOR) {
00440       /* No further limitations for the editor. */
00441     } else if (GetTileOwner(tile) == OWNER_NONE) {
00442       /* Owned by nobody, so we can only remove it with brute force! */
00443       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00444     } else if (CheckTileOwnership(tile).Failed()) {
00445       /* We don't own it!. */
00446       return_cmd_error(STR_ERROR_OWNED_BY);
00447     } else if ((spec->flags & OBJECT_FLAG_CANNOT_REMOVE) != 0 && (spec->flags & OBJECT_FLAG_AUTOREMOVE) == 0) {
00448       /* In the game editor or with cheats we can remove, otherwise we can't. */
00449       if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
00450 
00451       /* Removing with the cheat costs more in TTDPatch / the specs. */
00452       cost.MultiplyCost(25);
00453     }
00454   } else if ((spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0) {
00455     /* Water can't remove objects that are buildable on water. */
00456     return CMD_ERROR;
00457   }
00458 
00459   switch (type) {
00460     case OBJECT_HQ: {
00461       Company *c = Company::Get(GetTileOwner(tile));
00462       if (flags & DC_EXEC) {
00463         c->location_of_HQ = INVALID_TILE; // reset HQ position
00464         SetWindowDirty(WC_COMPANY, c->index);
00465         CargoPacket::InvalidateAllFrom(ST_HEADQUARTERS, c->index);
00466       }
00467 
00468       /* cost of relocating company is 1% of company value */
00469       cost = CommandCost(EXPENSES_PROPERTY, CalculateCompanyValue(c) / 100);
00470       break;
00471     }
00472 
00473     case OBJECT_STATUE:
00474       if (flags & DC_EXEC) {
00475         Town *town = o->town;
00476         ClrBit(town->statues, GetTileOwner(tile));
00477         SetWindowDirty(WC_TOWN_AUTHORITY, town->index);
00478       }
00479       break;
00480 
00481     default:
00482       break;
00483   }
00484 
00485   if (flags & DC_EXEC) ReallyClearObjectTile(o);
00486 
00487   return cost;
00488 }
00489 
00490 static void AddAcceptedCargo_Object(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted)
00491 {
00492   if (!IsCompanyHQ(tile)) return;
00493 
00494   /* HQ accepts passenger and mail; but we have to divide the values
00495    * between 4 tiles it occupies! */
00496 
00497   /* HQ level (depends on company performance) in the range 1..5. */
00498   uint level = GetCompanyHQSize(tile) + 1;
00499 
00500   /* Top town building generates 10, so to make HQ interesting, the top
00501    * type makes 20. */
00502   acceptance[CT_PASSENGERS] += max(1U, level);
00503   SetBit(*always_accepted, CT_PASSENGERS);
00504 
00505   /* Top town building generates 4, HQ can make up to 8. The
00506    * proportion passengers:mail is different because such a huge
00507    * commercial building generates unusually high amount of mail
00508    * correspondence per physical visitor. */
00509   acceptance[CT_MAIL] += max(1U, level / 2);
00510   SetBit(*always_accepted, CT_MAIL);
00511 }
00512 
00513 
00514 static void GetTileDesc_Object(TileIndex tile, TileDesc *td)
00515 {
00516   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00517   td->str = spec->name;
00518   td->owner[0] = GetTileOwner(tile);
00519   td->build_date = Object::GetByTile(tile)->build_date;
00520 
00521   if (spec->grf_prop.grffile != NULL) {
00522     td->grf = GetGRFConfig(spec->grf_prop.grffile->grfid)->GetName();
00523   }
00524 }
00525 
00526 static void TileLoop_Object(TileIndex tile)
00527 {
00528   const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
00529   if (spec->flags & OBJECT_FLAG_ANIMATION) {
00530     const Object *o = Object::GetByTile(tile);
00531     TriggerObjectTileAnimation(o, tile, OAT_TILELOOP, spec);
00532     if (o->location.tile == tile) TriggerObjectAnimation(o, OAT_256_TICKS, spec);
00533   }
00534 
00535   if (IsTileOnWater(tile)) TileLoop_Water(tile);
00536 
00537   if (!IsCompanyHQ(tile)) return;
00538 
00539   /* HQ accepts passenger and mail; but we have to divide the values
00540    * between 4 tiles it occupies! */
00541 
00542   /* HQ level (depends on company performance) in the range 1..5. */
00543   uint level = GetCompanyHQSize(tile) + 1;
00544   assert(level < 6);
00545 
00546   StationFinder stations(TileArea(tile, 2, 2));
00547 
00548   uint r = Random();
00549   /* Top town buildings generate 250, so the top HQ type makes 256. */
00550   if (GB(r, 0, 8) < (256 / 4 / (6 - level))) {
00551     uint amt = GB(r, 0, 8) / 8 / 4 + 1;
00552     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00553     MoveGoodsToStation(CT_PASSENGERS, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00554   }
00555 
00556   /* Top town building generates 90, HQ can make up to 196. The
00557    * proportion passengers:mail is about the same as in the acceptance
00558    * equations. */
00559   if (GB(r, 8, 8) < (196 / 4 / (6 - level))) {
00560     uint amt = GB(r, 8, 8) / 8 / 4 + 1;
00561     if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
00562     MoveGoodsToStation(CT_MAIL, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
00563   }
00564 }
00565 
00566 
00567 static TrackStatus GetTileTrackStatus_Object(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
00568 {
00569   return 0;
00570 }
00571 
00572 static bool ClickTile_Object(TileIndex tile)
00573 {
00574   if (!IsCompanyHQ(tile)) return false;
00575 
00576   ShowCompany(GetTileOwner(tile));
00577   return true;
00578 }
00579 
00580 static void AnimateTile_Object(TileIndex tile)
00581 {
00582   AnimateNewObjectTile(tile);
00583 }
00584 
00591 static bool HasTransmitter(TileIndex tile, void *user)
00592 {
00593   return IsTransmitterTile(tile);
00594 }
00595 
00596 void GenerateObjects()
00597 {
00598   if (_settings_game.game_creation.landscape == LT_TOYLAND) return;
00599 
00600   /* add radio tower */
00601   int radiotower_to_build = ScaleByMapSize(15); // maximum number of radio towers on the map
00602   int lighthouses_to_build = _settings_game.game_creation.landscape == LT_TROPIC ? 0 : ScaleByMapSize1D((Random() & 3) + 7);
00603 
00604   /* Scale the amount of lighthouses with the amount of land at the borders. */
00605   if (_settings_game.construction.freeform_edges && lighthouses_to_build != 0) {
00606     uint num_water_tiles = 0;
00607     for (uint x = 0; x < MapMaxX(); x++) {
00608       if (IsTileType(TileXY(x, 1), MP_WATER)) num_water_tiles++;
00609       if (IsTileType(TileXY(x, MapMaxY() - 1), MP_WATER)) num_water_tiles++;
00610     }
00611     for (uint y = 1; y < MapMaxY() - 1; y++) {
00612       if (IsTileType(TileXY(1, y), MP_WATER)) num_water_tiles++;
00613       if (IsTileType(TileXY(MapMaxX() - 1, y), MP_WATER)) num_water_tiles++;
00614     }
00615     /* The -6 is because the top borders are MP_VOID (-2) and all corners
00616      * are counted twice (-4). */
00617     lighthouses_to_build = lighthouses_to_build * num_water_tiles / (2 * MapMaxY() + 2 * MapMaxX() - 6);
00618   }
00619 
00620   SetGeneratingWorldProgress(GWP_OBJECT, radiotower_to_build + lighthouses_to_build);
00621 
00622   for (uint i = ScaleByMapSize(1000); i != 0 && Object::CanAllocateItem(); i--) {
00623     TileIndex tile = RandomTile();
00624 
00625     uint h;
00626     if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h >= TILE_HEIGHT * 4 && !IsBridgeAbove(tile)) {
00627       TileIndex t = tile;
00628       if (CircularTileSearch(&t, 9, HasTransmitter, NULL)) continue;
00629 
00630       BuildObject(OBJECT_TRANSMITTER, tile);
00631       IncreaseGeneratingWorldProgress(GWP_OBJECT);
00632       if (--radiotower_to_build == 0) break;
00633     }
00634   }
00635 
00636   /* add lighthouses */
00637   uint maxx = MapMaxX();
00638   uint maxy = MapMaxY();
00639   for (int loop_count = 0; loop_count < 1000 && lighthouses_to_build != 0 && Object::CanAllocateItem(); loop_count++) {
00640     uint r = Random();
00641 
00642     /* Scatter the lighthouses more evenly around the perimeter */
00643     int perimeter = (GB(r, 16, 16) % (2 * (maxx + maxy))) - maxy;
00644     DiagDirection dir;
00645     for (dir = DIAGDIR_NE; perimeter > 0; dir++) {
00646       perimeter -= (DiagDirToAxis(dir) == AXIS_X) ? maxx : maxy;
00647     }
00648 
00649     TileIndex tile;
00650     switch (dir) {
00651       default:
00652       case DIAGDIR_NE: tile = TileXY(maxx - 1, r % maxy); break;
00653       case DIAGDIR_SE: tile = TileXY(r % maxx, 1); break;
00654       case DIAGDIR_SW: tile = TileXY(1,        r % maxy); break;
00655       case DIAGDIR_NW: tile = TileXY(r % maxx, maxy - 1); break;
00656     }
00657 
00658     /* Only build lighthouses at tiles where the border is sea. */
00659     if (!IsTileType(tile, MP_WATER)) continue;
00660 
00661     for (int j = 0; j < 19; j++) {
00662       uint h;
00663       if (IsTileType(tile, MP_CLEAR) && GetTileSlope(tile, &h) == SLOPE_FLAT && h <= TILE_HEIGHT * 2 && !IsBridgeAbove(tile)) {
00664         BuildObject(OBJECT_LIGHTHOUSE, tile);
00665         IncreaseGeneratingWorldProgress(GWP_OBJECT);
00666         lighthouses_to_build--;
00667         assert(tile < MapSize());
00668         break;
00669       }
00670       tile = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDiagDir(dir));
00671       if (tile == INVALID_TILE) break;
00672     }
00673   }
00674 }
00675 
00676 static void ChangeTileOwner_Object(TileIndex tile, Owner old_owner, Owner new_owner)
00677 {
00678   if (!IsTileOwner(tile, old_owner)) return;
00679 
00680   if (IsOwnedLand(tile) && new_owner != INVALID_OWNER) {
00681     SetTileOwner(tile, new_owner);
00682   } else if (IsStatueTile(tile)) {
00683     Town *t = Object::GetByTile(tile)->town;
00684     ClrBit(t->statues, old_owner);
00685     if (new_owner != INVALID_OWNER && !HasBit(t->statues, new_owner)) {
00686       /* Transfer ownership to the new company */
00687       SetBit(t->statues, new_owner);
00688       SetTileOwner(tile, new_owner);
00689     } else {
00690       ReallyClearObjectTile(Object::GetByTile(tile));
00691     }
00692 
00693     SetWindowDirty(WC_TOWN_AUTHORITY, t->index);
00694   } else {
00695     ReallyClearObjectTile(Object::GetByTile(tile));
00696   }
00697 }
00698 
00699 static CommandCost TerraformTile_Object(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
00700 {
00701   ObjectType type = GetObjectType(tile);
00702 
00703   if (type == OBJECT_OWNED_LAND) {
00704     /* Owned land remains unsold */
00705     CommandCost ret = CheckTileOwnership(tile);
00706     if (ret.Succeeded()) return CommandCost();
00707   } else if (AutoslopeEnabled() && type != OBJECT_TRANSMITTER && type != OBJECT_LIGHTHOUSE) {
00708     /* Behaviour:
00709      *  - Both new and old slope must not be steep.
00710      *  - TileMaxZ must not be changed.
00711      *  - Allow autoslope by default.
00712      *  - Disallow autoslope if callback succeeds and returns non-zero.
00713      */
00714     Slope tileh_old = GetTileSlope(tile, NULL);
00715     /* TileMaxZ must not be changed. Slopes must not be steep. */
00716     if (!IsSteepSlope(tileh_old) && !IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
00717       const ObjectSpec *spec = ObjectSpec::Get(type);
00718 
00719       /* Call callback 'disable autosloping for objects'. */
00720       if (HasBit(spec->callback_mask, CBM_OBJ_AUTOSLOPE)) {
00721         /* If the callback fails, allow autoslope. */
00722         uint16 res = GetObjectCallback(CBID_OBJECT_AUTOSLOPE, 0, 0, spec, Object::GetByTile(tile), tile);
00723         if ((res == 0) || (res == CALLBACK_FAILED)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00724       } else if (spec->enabled) {
00725         /* allow autoslope */
00726         return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
00727       }
00728     }
00729   }
00730 
00731   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00732 }
00733 
00734 extern const TileTypeProcs _tile_type_object_procs = {
00735   DrawTile_Object,             // draw_tile_proc
00736   GetSlopeZ_Object,            // get_slope_z_proc
00737   ClearTile_Object,            // clear_tile_proc
00738   AddAcceptedCargo_Object,     // add_accepted_cargo_proc
00739   GetTileDesc_Object,          // get_tile_desc_proc
00740   GetTileTrackStatus_Object,   // get_tile_track_status_proc
00741   ClickTile_Object,            // click_tile_proc
00742   AnimateTile_Object,          // animate_tile_proc
00743   TileLoop_Object,             // tile_loop_clear
00744   ChangeTileOwner_Object,      // change_tile_owner_clear
00745   NULL,                        // add_produced_cargo_proc
00746   NULL,                        // vehicle_enter_tile_proc
00747   GetFoundation_Object,        // get_foundation_proc
00748   TerraformTile_Object,        // terraform_tile_proc
00749 };

Generated on Sun May 15 19:20:12 2011 for OpenTTD by  doxygen 1.6.1