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00012 #include "stdafx.h"
00013 #include "variables.h"
00014 #include "debug.h"
00015 #include "viewport_func.h"
00016 #include "landscape.h"
00017 #include "newgrf.h"
00018 #include "newgrf_house.h"
00019 #include "newgrf_spritegroup.h"
00020 #include "newgrf_town.h"
00021 #include "newgrf_sound.h"
00022 #include "newgrf_commons.h"
00023 #include "functions.h"
00024 #include "company_func.h"
00025 #include "animated_tile_func.h"
00026 #include "company_base.h"
00027 #include "town.h"
00028 #include "core/random_func.hpp"
00029 #include "sprite.h"
00030
00031 static BuildingCounts<uint32> _building_counts;
00032 static HouseClassMapping _class_mapping[HOUSE_CLASS_MAX];
00033
00034 HouseOverrideManager _house_mngr(NEW_HOUSE_OFFSET, HOUSE_MAX, INVALID_HOUSE_ID);
00035
00036 HouseClassID AllocateHouseClassID(byte grf_class_id, uint32 grfid)
00037 {
00038
00039 for (int i = 1; i != lengthof(_class_mapping); i++) {
00040 HouseClassMapping *map = &_class_mapping[i];
00041
00042 if (map->class_id == grf_class_id && map->grfid == grfid) return (HouseClassID)i;
00043
00044 if (map->class_id == 0 && map->grfid == 0) {
00045 map->class_id = grf_class_id;
00046 map->grfid = grfid;
00047 return (HouseClassID)i;
00048 }
00049 }
00050 return HOUSE_NO_CLASS;
00051 }
00052
00053 void InitializeBuildingCounts()
00054 {
00055 memset(&_building_counts, 0, sizeof(_building_counts));
00056 }
00057
00064 void IncreaseBuildingCount(Town *t, HouseID house_id)
00065 {
00066 HouseClassID class_id = HouseSpec::Get(house_id)->class_id;
00067
00068 if (!_loaded_newgrf_features.has_newhouses) return;
00069
00070 t->building_counts.id_count[house_id]++;
00071 _building_counts.id_count[house_id]++;
00072
00073 if (class_id == HOUSE_NO_CLASS) return;
00074
00075 t->building_counts.class_count[class_id]++;
00076 _building_counts.class_count[class_id]++;
00077 }
00078
00085 void DecreaseBuildingCount(Town *t, HouseID house_id)
00086 {
00087 HouseClassID class_id = HouseSpec::Get(house_id)->class_id;
00088
00089 if (!_loaded_newgrf_features.has_newhouses) return;
00090
00091 if (t->building_counts.id_count[house_id] > 0) t->building_counts.id_count[house_id]--;
00092 if (_building_counts.id_count[house_id] > 0) _building_counts.id_count[house_id]--;
00093
00094 if (class_id == HOUSE_NO_CLASS) return;
00095
00096 if (t->building_counts.class_count[class_id] > 0) t->building_counts.class_count[class_id]--;
00097 if (_building_counts.class_count[class_id] > 0) _building_counts.class_count[class_id]--;
00098 }
00099
00100 static uint32 HouseGetRandomBits(const ResolverObject *object)
00101 {
00102
00103 TileIndex tile = object->u.house.tile;
00104 assert(IsValidTile(tile) && (object->u.house.not_yet_constructed || IsTileType(tile, MP_HOUSE)));
00105 return object->u.house.not_yet_constructed ? 0 : GetHouseRandomBits(tile);
00106 }
00107
00108 static uint32 HouseGetTriggers(const ResolverObject *object)
00109 {
00110
00111 TileIndex tile = object->u.house.tile;
00112 assert(IsValidTile(tile) && (object->u.house.not_yet_constructed || IsTileType(tile, MP_HOUSE)));
00113 return object->u.house.not_yet_constructed ? 0 : GetHouseTriggers(tile);
00114 }
00115
00116 static void HouseSetTriggers(const ResolverObject *object, int triggers)
00117 {
00118 TileIndex tile = object->u.house.tile;
00119 assert(!object->u.house.not_yet_constructed && IsValidTile(tile) && IsTileType(tile, MP_HOUSE));
00120 SetHouseTriggers(tile, triggers);
00121 }
00122
00123 static uint32 GetNumHouses(HouseID house_id, const Town *town)
00124 {
00125 uint8 map_id_count, town_id_count, map_class_count, town_class_count;
00126 HouseClassID class_id = HouseSpec::Get(house_id)->class_id;
00127
00128 map_id_count = ClampU(_building_counts.id_count[house_id], 0, 255);
00129 map_class_count = ClampU(_building_counts.class_count[class_id], 0, 255);
00130 town_id_count = ClampU(town->building_counts.id_count[house_id], 0, 255);
00131 town_class_count = ClampU(town->building_counts.class_count[class_id], 0, 255);
00132
00133 return map_class_count << 24 | town_class_count << 16 | map_id_count << 8 | town_id_count;
00134 }
00135
00136 uint32 GetNearbyTileInformation(byte parameter, TileIndex tile)
00137 {
00138 tile = GetNearbyTile(parameter, tile);
00139 return GetNearbyTileInformation(tile);
00140 }
00141
00143 typedef struct {
00144 const HouseSpec *hs;
00145 TileIndex north_tile;
00146 } SearchNearbyHouseData;
00147
00153 static bool SearchNearbyHouseID(TileIndex tile, void *user_data)
00154 {
00155 if (IsTileType(tile, MP_HOUSE)) {
00156 HouseID house = GetHouseType(tile);
00157 const HouseSpec *hs = HouseSpec::Get(house);
00158 if (hs->grffile != NULL) {
00159 SearchNearbyHouseData *nbhd = (SearchNearbyHouseData *)user_data;
00160
00161 TileIndex north_tile = tile + GetHouseNorthPart(house);
00162 if (north_tile == nbhd->north_tile) return false;
00163
00164 return hs->local_id == nbhd->hs->local_id &&
00165 hs->grffile->grfid == nbhd->hs->grffile->grfid;
00166 }
00167 }
00168 return false;
00169 }
00170
00176 static bool SearchNearbyHouseClass(TileIndex tile, void *user_data)
00177 {
00178 if (IsTileType(tile, MP_HOUSE)) {
00179 HouseID house = GetHouseType(tile);
00180 const HouseSpec *hs = HouseSpec::Get(house);
00181 if (hs->grffile != NULL) {
00182 SearchNearbyHouseData *nbhd = (SearchNearbyHouseData *)user_data;
00183
00184 TileIndex north_tile = tile + GetHouseNorthPart(house);
00185 if (north_tile == nbhd->north_tile) return false;
00186
00187 return hs->class_id == nbhd->hs->class_id &&
00188 hs->grffile->grfid == nbhd->hs->grffile->grfid;
00189 }
00190 }
00191 return false;
00192 }
00193
00199 static bool SearchNearbyHouseGRFID(TileIndex tile, void *user_data)
00200 {
00201 if (IsTileType(tile, MP_HOUSE)) {
00202 HouseID house = GetHouseType(tile);
00203 const HouseSpec *hs = HouseSpec::Get(house);
00204 if (hs->grffile != NULL) {
00205 SearchNearbyHouseData *nbhd = (SearchNearbyHouseData *)user_data;
00206
00207 TileIndex north_tile = tile + GetHouseNorthPart(house);
00208 if (north_tile == nbhd->north_tile) return false;
00209
00210 return hs->grffile->grfid == nbhd->hs->grffile->grfid;
00211 }
00212 }
00213 return false;
00214 }
00215
00225 static uint32 GetDistanceFromNearbyHouse(uint8 parameter, TileIndex tile, HouseID house)
00226 {
00227 static TestTileOnSearchProc * const search_procs[3] = {
00228 SearchNearbyHouseID,
00229 SearchNearbyHouseClass,
00230 SearchNearbyHouseGRFID,
00231 };
00232 TileIndex found_tile = tile;
00233 uint8 searchtype = GB(parameter, 6, 2);
00234 uint8 searchradius = GB(parameter, 0, 6);
00235 if (searchtype >= lengthof(search_procs)) return 0;
00236 if (searchradius < 1) return 0;
00237
00238 SearchNearbyHouseData nbhd;
00239 nbhd.hs = HouseSpec::Get(house);
00240 nbhd.north_tile = tile + GetHouseNorthPart(house);
00241
00242
00243 if (CircularTileSearch(&found_tile, 2 * searchradius + 1, search_procs[searchtype], &nbhd)) {
00244 return DistanceManhattan(found_tile, tile);
00245 }
00246 return 0;
00247 }
00248
00254 static uint32 HouseGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
00255 {
00256 const Town *town = object->u.house.town;
00257 TileIndex tile = object->u.house.tile;
00258 HouseID house_id = object->u.house.house_id;
00259
00260 if (object->scope == VSG_SCOPE_PARENT) {
00261 return TownGetVariable(variable, parameter, available, town);
00262 }
00263
00264 switch (variable) {
00265
00266 case 0x40: return (IsTileType(tile, MP_HOUSE) ? GetHouseBuildingStage(tile) : 0) | TileHash2Bit(TileX(tile), TileY(tile)) << 2;
00267
00268
00269 case 0x41: return IsTileType(tile, MP_HOUSE) ? GetHouseAge(tile) : 0;
00270
00271
00272 case 0x42: return GetTownRadiusGroup(town, tile);
00273
00274
00275 case 0x43: return GetTerrainType(tile);
00276
00277
00278 case 0x44: return GetNumHouses(house_id, town);
00279
00280
00281 case 0x45: return _generating_world ? 1 : 0;
00282
00283
00284 case 0x46: return IsTileType(tile, MP_HOUSE) ? GetHouseAnimationFrame(tile) : 0;
00285
00286
00287 case 0x47: return TileY(tile) << 16 | TileX(tile);
00288
00289
00290 case 0x60: return GetNumHouses(parameter, town);
00291
00292
00293 case 0x61: {
00294 const HouseSpec *hs = HouseSpec::Get(house_id);
00295 if (hs->grffile == NULL) return 0;
00296
00297 HouseID new_house = _house_mngr.GetID(parameter, hs->grffile->grfid);
00298 return new_house == INVALID_HOUSE_ID ? 0 : GetNumHouses(new_house, town);
00299 }
00300
00301
00302 case 0x62: return GetNearbyTileInformation(parameter, tile);
00303
00304
00305 case 0x63: {
00306 TileIndex testtile = GetNearbyTile(parameter, tile);
00307 return IsTileType(testtile, MP_HOUSE) ? GetHouseAnimationFrame(testtile) : 0;
00308 }
00309
00310
00311
00312
00313
00314 case 0x65: return GetDistanceFromNearbyHouse(parameter, tile, object->u.house.house_id);
00315
00316
00317 case 0x66: {
00318 TileIndex testtile = GetNearbyTile(parameter, tile);
00319 if (!IsTileType(testtile, MP_HOUSE)) return 0xFFFFFFFF;
00320 HouseSpec *hs = HouseSpec::Get(GetHouseType(testtile));
00321
00322 uint houseclass = 0;
00323 if (hs->class_id != HOUSE_NO_CLASS) {
00324 houseclass = (hs->grffile == object->grffile ? 1 : 2) << 8;
00325 houseclass |= _class_mapping[hs->class_id].class_id;
00326 }
00327
00328 uint local_houseid = 0;
00329 if (house_id < NEW_HOUSE_OFFSET) {
00330 local_houseid = house_id;
00331 } else {
00332 local_houseid = (hs->grffile == object->grffile ? 1 : 2) << 8;
00333 local_houseid |= hs->local_id;
00334 }
00335 return houseclass << 16 | local_houseid;
00336 }
00337
00338
00339 case 0x67: {
00340 TileIndex testtile = GetNearbyTile(parameter, tile);
00341 if (!IsTileType(testtile, MP_HOUSE)) return 0xFFFFFFFF;
00342 HouseID house_id = GetHouseType(testtile);
00343 if (house_id < NEW_HOUSE_OFFSET) return 0;
00344
00345
00346 return _house_mngr.mapping_ID[house_id].grfid;
00347 }
00348 }
00349
00350 DEBUG(grf, 1, "Unhandled house property 0x%X", variable);
00351
00352 *available = false;
00353 return UINT_MAX;
00354 }
00355
00356 static const SpriteGroup *HouseResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
00357 {
00358
00359 return NULL;
00360 }
00361
00367 static void NewHouseResolver(ResolverObject *res, HouseID house_id, TileIndex tile, Town *town)
00368 {
00369 res->GetRandomBits = HouseGetRandomBits;
00370 res->GetTriggers = HouseGetTriggers;
00371 res->SetTriggers = HouseSetTriggers;
00372 res->GetVariable = HouseGetVariable;
00373 res->ResolveReal = HouseResolveReal;
00374
00375 res->u.house.tile = tile;
00376 res->u.house.town = town;
00377 res->u.house.house_id = house_id;
00378 res->u.house.not_yet_constructed = false;
00379
00380 res->callback = CBID_NO_CALLBACK;
00381 res->callback_param1 = 0;
00382 res->callback_param2 = 0;
00383 res->last_value = 0;
00384 res->trigger = 0;
00385 res->reseed = 0;
00386 res->count = 0;
00387
00388 const HouseSpec *hs = HouseSpec::Get(house_id);
00389 res->grffile = (hs != NULL ? hs->grffile : NULL);
00390 }
00391
00392 uint16 GetHouseCallback(CallbackID callback, uint32 param1, uint32 param2, HouseID house_id, Town *town, TileIndex tile, bool not_yet_constructed)
00393 {
00394 ResolverObject object;
00395 const SpriteGroup *group;
00396
00397 assert(IsValidTile(tile) && (not_yet_constructed || IsTileType(tile, MP_HOUSE)));
00398
00399 NewHouseResolver(&object, house_id, tile, town);
00400 object.callback = callback;
00401 object.callback_param1 = param1;
00402 object.callback_param2 = param2;
00403 object.u.house.not_yet_constructed = not_yet_constructed;
00404
00405 group = SpriteGroup::Resolve(HouseSpec::Get(house_id)->spritegroup, &object);
00406 if (group == NULL) return CALLBACK_FAILED;
00407
00408 return group->GetCallbackResult();
00409 }
00410
00411 static void DrawTileLayout(const TileInfo *ti, const TileLayoutSpriteGroup *group, byte stage, HouseID house_id)
00412 {
00413 const DrawTileSprites *dts = group->dts;
00414
00415 const HouseSpec *hs = HouseSpec::Get(house_id);
00416 PaletteID palette = hs->random_colour[TileHash2Bit(ti->x, ti->y)] + PALETTE_RECOLOUR_START;
00417 if (HasBit(hs->callback_mask, CBM_HOUSE_COLOUR)) {
00418 uint16 callback = GetHouseCallback(CBID_HOUSE_COLOUR, 0, 0, house_id, Town::GetByTile(ti->tile), ti->tile);
00419 if (callback != CALLBACK_FAILED) {
00420
00421 palette = HasBit(callback, 14) ? GB(callback, 0, 8) + SPR_2CCMAP_BASE : callback;
00422 }
00423 }
00424
00425 SpriteID image = dts->ground.sprite;
00426 PaletteID pal = dts->ground.pal;
00427
00428 if (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) image += stage;
00429
00430 if (GB(image, 0, SPRITE_WIDTH) != 0) {
00431 DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
00432 }
00433
00434 DrawNewGRFTileSeq(ti, dts, TO_HOUSES, stage, palette);
00435 }
00436
00437 void DrawNewHouseTile(TileInfo *ti, HouseID house_id)
00438 {
00439 const HouseSpec *hs = HouseSpec::Get(house_id);
00440 const SpriteGroup *group;
00441 ResolverObject object;
00442
00443 if (ti->tileh != SLOPE_FLAT) {
00444 bool draw_old_one = true;
00445 if (HasBit(hs->callback_mask, CBM_HOUSE_DRAW_FOUNDATIONS)) {
00446
00447 uint32 callback_res = GetHouseCallback(CBID_HOUSE_DRAW_FOUNDATIONS, 0, 0, house_id, Town::GetByTile(ti->tile), ti->tile);
00448 draw_old_one = (callback_res != 0);
00449 }
00450
00451 if (draw_old_one) DrawFoundation(ti, FOUNDATION_LEVELED);
00452 }
00453
00454 NewHouseResolver(&object, house_id, ti->tile, Town::GetByTile(ti->tile));
00455
00456 group = SpriteGroup::Resolve(hs->spritegroup, &object);
00457 if (group == NULL || group->type != SGT_TILELAYOUT) {
00458 return;
00459 } else {
00460
00461 const TileLayoutSpriteGroup *tlgroup = (const TileLayoutSpriteGroup *)group;
00462 byte stage = GetHouseBuildingStage(ti->tile);
00463 stage = Clamp(stage - 4 + tlgroup->num_building_stages, 0, tlgroup->num_building_stages - 1);
00464 DrawTileLayout(ti, tlgroup, stage, house_id);
00465 }
00466 }
00467
00468 void AnimateNewHouseTile(TileIndex tile)
00469 {
00470 const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
00471 byte animation_speed = hs->animation_speed;
00472 bool frame_set_by_callback = false;
00473
00474 if (HasBit(hs->callback_mask, CBM_HOUSE_ANIMATION_SPEED)) {
00475 uint16 callback_res = GetHouseCallback(CBID_HOUSE_ANIMATION_SPEED, 0, 0, GetHouseType(tile), Town::GetByTile(tile), tile);
00476 if (callback_res != CALLBACK_FAILED) animation_speed = Clamp(callback_res & 0xFF, 2, 16);
00477 }
00478
00479
00480
00481
00482
00483 if (_tick_counter % (1 << animation_speed) != 0) return;
00484
00485 byte frame = GetHouseAnimationFrame(tile);
00486 byte num_frames = GB(hs->animation_frames, 0, 7);
00487
00488 if (HasBit(hs->callback_mask, CBM_HOUSE_ANIMATION_NEXT_FRAME)) {
00489 uint32 param = (hs->extra_flags & CALLBACK_1A_RANDOM_BITS) ? Random() : 0;
00490 uint16 callback_res = GetHouseCallback(CBID_HOUSE_ANIMATION_NEXT_FRAME, param, 0, GetHouseType(tile), Town::GetByTile(tile), tile);
00491
00492 if (callback_res != CALLBACK_FAILED) {
00493 frame_set_by_callback = true;
00494
00495 switch (callback_res & 0xFF) {
00496 case 0xFF:
00497 DeleteAnimatedTile(tile);
00498 break;
00499 case 0xFE:
00500
00501 frame_set_by_callback = false;
00502 break;
00503 default:
00504 frame = callback_res & 0xFF;
00505 break;
00506 }
00507
00508
00509
00510 if (GB(callback_res, 8, 7) != 0) PlayTileSound(hs->grffile, GB(callback_res, 8, 7), tile);
00511 }
00512 }
00513
00514 if (!frame_set_by_callback) {
00515 if (frame < num_frames) {
00516 frame++;
00517 } else if (frame == num_frames && HasBit(hs->animation_frames, 7)) {
00518
00519 frame = 0;
00520 } else {
00521
00522 DeleteAnimatedTile(tile);
00523 }
00524 }
00525
00526 SetHouseAnimationFrame(tile, frame);
00527 MarkTileDirtyByTile(tile);
00528 }
00529
00530 void ChangeHouseAnimationFrame(const GRFFile *file, TileIndex tile, uint16 callback_result)
00531 {
00532 switch (callback_result & 0xFF) {
00533 case 0xFD: break;
00534 case 0xFE: AddAnimatedTile(tile); break;
00535 case 0xFF: DeleteAnimatedTile(tile); break;
00536 default:
00537 SetHouseAnimationFrame(tile, callback_result & 0xFF);
00538 AddAnimatedTile(tile);
00539 break;
00540 }
00541
00542
00543 if (GB(callback_result, 8, 7) != 0) PlayTileSound(file, GB(callback_result, 8, 7), tile);
00544 }
00545
00546 bool CanDeleteHouse(TileIndex tile)
00547 {
00548 const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
00549
00550
00551
00552 if (Company::IsValidHumanID(_current_company) || _current_company == OWNER_WATER || _current_company == OWNER_NONE) {
00553 return true;
00554 }
00555
00556 if (HasBit(hs->callback_mask, CBM_HOUSE_DENY_DESTRUCTION)) {
00557 uint16 callback_res = GetHouseCallback(CBID_HOUSE_DENY_DESTRUCTION, 0, 0, GetHouseType(tile), Town::GetByTile(tile), tile);
00558 return (callback_res == CALLBACK_FAILED || callback_res == 0);
00559 } else {
00560 return !(hs->extra_flags & BUILDING_IS_PROTECTED);
00561 }
00562 }
00563
00564 static void AnimationControl(TileIndex tile, uint16 random_bits)
00565 {
00566 const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
00567
00568 if (HasBit(hs->callback_mask, CBM_HOUSE_ANIMATION_START_STOP)) {
00569 uint32 param = (hs->extra_flags & SYNCHRONISED_CALLBACK_1B) ? (GB(Random(), 0, 16) | random_bits << 16) : Random();
00570 uint16 callback_res = GetHouseCallback(CBID_HOUSE_ANIMATION_START_STOP, param, 0, GetHouseType(tile), Town::GetByTile(tile), tile);
00571
00572 if (callback_res != CALLBACK_FAILED) ChangeHouseAnimationFrame(hs->grffile, tile, callback_res);
00573 }
00574 }
00575
00576 bool NewHouseTileLoop(TileIndex tile)
00577 {
00578 const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
00579
00580 if (GetHouseProcessingTime(tile) > 0) {
00581 DecHouseProcessingTime(tile);
00582 return true;
00583 }
00584
00585 TriggerHouse(tile, HOUSE_TRIGGER_TILE_LOOP);
00586 if (hs->building_flags & BUILDING_HAS_1_TILE) TriggerHouse(tile, HOUSE_TRIGGER_TILE_LOOP_TOP);
00587
00588 if (HasBit(hs->callback_mask, CBM_HOUSE_ANIMATION_START_STOP)) {
00589
00590
00591
00592
00593 if (hs->extra_flags & SYNCHRONISED_CALLBACK_1B) {
00594 uint16 random = GB(Random(), 0, 16);
00595
00596 if (hs->building_flags & BUILDING_HAS_1_TILE) AnimationControl(tile, random);
00597 if (hs->building_flags & BUILDING_2_TILES_Y) AnimationControl(TILE_ADDXY(tile, 0, 1), random);
00598 if (hs->building_flags & BUILDING_2_TILES_X) AnimationControl(TILE_ADDXY(tile, 1, 0), random);
00599 if (hs->building_flags & BUILDING_HAS_4_TILES) AnimationControl(TILE_ADDXY(tile, 1, 1), random);
00600 } else {
00601 AnimationControl(tile, 0);
00602 }
00603 }
00604
00605
00606 if (HasBit(hs->callback_mask, CBM_HOUSE_DESTRUCTION)) {
00607 uint16 callback_res = GetHouseCallback(CBID_HOUSE_DESTRUCTION, 0, 0, GetHouseType(tile), Town::GetByTile(tile), tile);
00608 if (callback_res != CALLBACK_FAILED && GB(callback_res, 0, 8) > 0) {
00609 ClearTownHouse(Town::GetByTile(tile), tile);
00610 return false;
00611 }
00612 }
00613
00614 SetHouseProcessingTime(tile, hs->processing_time);
00615 MarkTileDirtyByTile(tile);
00616 return true;
00617 }
00618
00619 static void DoTriggerHouse(TileIndex tile, HouseTrigger trigger, byte base_random, bool first)
00620 {
00621 ResolverObject object;
00622
00623
00624 assert(IsTileType(tile, MP_HOUSE));
00625
00626 HouseID hid = GetHouseType(tile);
00627 HouseSpec *hs = HouseSpec::Get(hid);
00628
00629 if (hs->spritegroup == NULL) return;
00630
00631 NewHouseResolver(&object, hid, tile, Town::GetByTile(tile));
00632
00633 object.callback = CBID_RANDOM_TRIGGER;
00634 object.trigger = trigger;
00635
00636 const SpriteGroup *group = SpriteGroup::Resolve(hs->spritegroup, &object);
00637 if (group == NULL) return;
00638
00639 byte new_random_bits = Random();
00640 byte random_bits = GetHouseRandomBits(tile);
00641 random_bits &= ~object.reseed;
00642 random_bits |= (first ? new_random_bits : base_random) & object.reseed;
00643 SetHouseRandomBits(tile, random_bits);
00644
00645 switch (trigger) {
00646 case HOUSE_TRIGGER_TILE_LOOP:
00647
00648 break;
00649
00650 case HOUSE_TRIGGER_TILE_LOOP_TOP:
00651 if (!first) {
00652
00653 MarkTileDirtyByTile(tile);
00654 break;
00655 }
00656
00657 if (hs->building_flags & BUILDING_2_TILES_Y) DoTriggerHouse(TILE_ADDXY(tile, 0, 1), trigger, random_bits, false);
00658 if (hs->building_flags & BUILDING_2_TILES_X) DoTriggerHouse(TILE_ADDXY(tile, 1, 0), trigger, random_bits, false);
00659 if (hs->building_flags & BUILDING_HAS_4_TILES) DoTriggerHouse(TILE_ADDXY(tile, 1, 1), trigger, random_bits, false);
00660 break;
00661 }
00662 }
00663
00664 void TriggerHouse(TileIndex t, HouseTrigger trigger)
00665 {
00666 DoTriggerHouse(t, trigger, 0, true);
00667 }