OpenTTD: src/newgrf_house.cpp Source File

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newgrf_house.cpp
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1 /* $Id: newgrf_house.cpp 27984 2018-03-11 13:19:41Z frosch $ */
2
3 /*
4 * This file is part of OpenTTD.
5 * 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.
6 * 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.
7 * 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/>.
8 */
9
12 #include "stdafx.h"
13 #include "debug.h"
14 #include "landscape.h"
15 #include "newgrf_house.h"
16 #include "newgrf_spritegroup.h"
17 #include "newgrf_town.h"
18 #include "newgrf_sound.h"
19 #include "company_func.h"
20 #include "company_base.h"
21 #include "town.h"
22 #include "genworld.h"
23 #include "newgrf_animation_base.h"
24 #include "newgrf_cargo.h"
25 #include "station_base.h"
26
27 #include "safeguards.h"
28
29 static BuildingCounts<uint32> _building_counts;
30 static HouseClassMapping _class_mapping[HOUSE_CLASS_MAX];
31
32 HouseOverrideManager _house_mngr(NEW_HOUSE_OFFSET, NUM_HOUSES, INVALID_HOUSE_ID);
33
39 static const GRFFile *GetHouseSpecGrf(HouseID house_id)
40 {
41 const HouseSpec *hs = HouseSpec::Get(house_id);
42 return (hs != NULL) ? hs->grf_prop.grffile : NULL;
43 }
44
57 HouseResolverObject::HouseResolverObject(HouseID house_id, TileIndex tile, Town *town,
58 CallbackID callback, uint32 param1, uint32 param2,
59 bool not_yet_constructed, uint8 initial_random_bits, uint32 watched_cargo_triggers)
60 : ResolverObject(GetHouseSpecGrf(house_id), callback, param1, param2),
61 house_scope(*this, house_id, tile, town, not_yet_constructed, initial_random_bits, watched_cargo_triggers),
62 town_scope(*this, town, not_yet_constructed) // Don't access StorePSA if house is not yet constructed.
63 {
64 this->root_spritegroup = HouseSpec::Get(house_id)->grf_prop.spritegroup[0];
65 }
66
67 HouseClassID AllocateHouseClassID(byte grf_class_id, uint32 grfid)
68 {
69 /* Start from 1 because 0 means that no class has been assigned. */
70 for (int i = 1; i != lengthof(_class_mapping); i++) {
71 HouseClassMapping *map = &_class_mapping[i];
72
73 if (map->class_id == grf_class_id && map->grfid == grfid) return (HouseClassID)i;
74
75 if (map->class_id == 0 && map->grfid == 0) {
76 map->class_id = grf_class_id;
77 map->grfid = grfid;
78 return (HouseClassID)i;
79 }
80 }
81 return HOUSE_NO_CLASS;
82 }
83
84 void InitializeBuildingCounts()
85 {
86 memset(&_building_counts, 0, sizeof(_building_counts));
87
88 Town *t;
89 FOR_ALL_TOWNS(t) {
90 memset(&t->cache.building_counts, 0, sizeof(t->cache.building_counts));
91 }
92 }
93
100 void IncreaseBuildingCount(Town *t, HouseID house_id)
101 {
102 HouseClassID class_id = HouseSpec::Get(house_id)->class_id;
103
104 if (!_loaded_newgrf_features.has_newhouses) return;
105
106 t->cache.building_counts.id_count[house_id]++;
107 _building_counts.id_count[house_id]++;
108
109 if (class_id == HOUSE_NO_CLASS) return;
110
111 t->cache.building_counts.class_count[class_id]++;
112 _building_counts.class_count[class_id]++;
113 }
114
121 void DecreaseBuildingCount(Town *t, HouseID house_id)
122 {
123 HouseClassID class_id = HouseSpec::Get(house_id)->class_id;
124
125 if (!_loaded_newgrf_features.has_newhouses) return;
126
127 if (t->cache.building_counts.id_count[house_id] > 0) t->cache.building_counts.id_count[house_id]--;
128 if (_building_counts.id_count[house_id] > 0) _building_counts.id_count[house_id]--;
129
130 if (class_id == HOUSE_NO_CLASS) return;
131
132 if (t->cache.building_counts.class_count[class_id] > 0) t->cache.building_counts.class_count[class_id]--;
133 if (_building_counts.class_count[class_id] > 0) _building_counts.class_count[class_id]--;
134 }
135
136 /* virtual */ uint32 HouseScopeResolver::GetRandomBits() const
137 {
138 /* Note: Towns build houses over houses. So during construction checks 'tile' may be a valid but unrelated house. */
139 assert(IsValidTile(this->tile) && (this->not_yet_constructed || IsTileType(this->tile, MP_HOUSE)));
140 return this->not_yet_constructed ? this->initial_random_bits : GetHouseRandomBits(this->tile);
141 }
142
143 /* virtual */ uint32 HouseScopeResolver::GetTriggers() const
144 {
145 /* Note: Towns build houses over houses. So during construction checks 'tile' may be a valid but unrelated house. */
146 assert(IsValidTile(this->tile) && (this->not_yet_constructed || IsTileType(this->tile, MP_HOUSE)));
147 return this->not_yet_constructed ? 0 : GetHouseTriggers(this->tile);
148 }
149
150 static uint32 GetNumHouses(HouseID house_id, const Town *town)
151 {
152 uint8 map_id_count, town_id_count, map_class_count, town_class_count;
153 HouseClassID class_id = HouseSpec::Get(house_id)->class_id;
154
155 map_id_count = ClampU(_building_counts.id_count[house_id], 0, 255);
156 map_class_count = ClampU(_building_counts.class_count[class_id], 0, 255);
157 town_id_count = ClampU(town->cache.building_counts.id_count[house_id], 0, 255);
158 town_class_count = ClampU(town->cache.building_counts.class_count[class_id], 0, 255);
159
160 return map_class_count << 24 | town_class_count << 16 | map_id_count << 8 | town_id_count;
161 }
162
170 static uint32 GetNearbyTileInformation(byte parameter, TileIndex tile, bool grf_version8)
171 {
172 tile = GetNearbyTile(parameter, tile);
173 return GetNearbyTileInformation(tile, grf_version8);
174 }
175
177 struct SearchNearbyHouseData {
178 const HouseSpec *hs;
179 TileIndex north_tile;
180 };
181
188 static bool SearchNearbyHouseID(TileIndex tile, void *user_data)
189 {
190 if (IsTileType(tile, MP_HOUSE)) {
191 HouseID house = GetHouseType(tile); // tile been examined
192 const HouseSpec *hs = HouseSpec::Get(house);
193 if (hs->grf_prop.grffile != NULL) { // must be one from a grf file
194 SearchNearbyHouseData *nbhd = (SearchNearbyHouseData *)user_data;
195
196 TileIndex north_tile = tile + GetHouseNorthPart(house); // modifies 'house'!
197 if (north_tile == nbhd->north_tile) return false; // Always ignore origin house
198
199 return hs->grf_prop.local_id == nbhd->hs->grf_prop.local_id && // same local id as the one requested
200 hs->grf_prop.grffile->grfid == nbhd->hs->grf_prop.grffile->grfid; // from the same grf
201 }
202 }
203 return false;
204 }
205
212 static bool SearchNearbyHouseClass(TileIndex tile, void *user_data)
213 {
214 if (IsTileType(tile, MP_HOUSE)) {
215 HouseID house = GetHouseType(tile); // tile been examined
216 const HouseSpec *hs = HouseSpec::Get(house);
217 if (hs->grf_prop.grffile != NULL) { // must be one from a grf file
218 SearchNearbyHouseData *nbhd = (SearchNearbyHouseData *)user_data;
219
220 TileIndex north_tile = tile + GetHouseNorthPart(house); // modifies 'house'!
221 if (north_tile == nbhd->north_tile) return false; // Always ignore origin house
222
223 return hs->class_id == nbhd->hs->class_id && // same classid as the one requested
224 hs->grf_prop.grffile->grfid == nbhd->hs->grf_prop.grffile->grfid; // from the same grf
225 }
226 }
227 return false;
228 }
229
236 static bool SearchNearbyHouseGRFID(TileIndex tile, void *user_data)
237 {
238 if (IsTileType(tile, MP_HOUSE)) {
239 HouseID house = GetHouseType(tile); // tile been examined
240 const HouseSpec *hs = HouseSpec::Get(house);
241 if (hs->grf_prop.grffile != NULL) { // must be one from a grf file
242 SearchNearbyHouseData *nbhd = (SearchNearbyHouseData *)user_data;
243
244 TileIndex north_tile = tile + GetHouseNorthPart(house); // modifies 'house'!
245 if (north_tile == nbhd->north_tile) return false; // Always ignore origin house
246
247 return hs->grf_prop.grffile->grfid == nbhd->hs->grf_prop.grffile->grfid; // from the same grf
248 }
249 }
250 return false;
251 }
252
263 static uint32 GetDistanceFromNearbyHouse(uint8 parameter, TileIndex tile, HouseID house)
264 {
265 static TestTileOnSearchProc * const search_procs[3] = {
266 SearchNearbyHouseID,
267 SearchNearbyHouseClass,
268 SearchNearbyHouseGRFID,
269 };
270 TileIndex found_tile = tile;
271 uint8 searchtype = GB(parameter, 6, 2);
272 uint8 searchradius = GB(parameter, 0, 6);
273 if (searchtype >= lengthof(search_procs)) return 0; // do not run on ill-defined code
274 if (searchradius < 1) return 0; // do not use a too low radius
275
276 SearchNearbyHouseData nbhd;
277 nbhd.hs = HouseSpec::Get(house);
278 nbhd.north_tile = tile + GetHouseNorthPart(house); // modifies 'house'!
279
280 /* Use a pointer for the tile to start the search. Will be required for calculating the distance*/
281 if (CircularTileSearch(&found_tile, 2 * searchradius + 1, search_procs[searchtype], &nbhd)) {
282 return DistanceManhattan(found_tile, tile);
283 }
284 return 0;
285 }
286
290 /* virtual */ uint32 HouseScopeResolver::GetVariable(byte variable, uint32 parameter, bool *available) const
291 {
292 switch (variable) {
293 /* Construction stage. */
294 case 0x40: return (IsTileType(this->tile, MP_HOUSE) ? GetHouseBuildingStage(this->tile) : 0) | TileHash2Bit(TileX(this->tile), TileY(this->tile)) << 2;
295
296 /* Building age. */
297 case 0x41: return IsTileType(this->tile, MP_HOUSE) ? GetHouseAge(this->tile) : 0;
298
299 /* Town zone */
300 case 0x42: return GetTownRadiusGroup(this->town, this->tile);
301
302 /* Terrain type */
303 case 0x43: return GetTerrainType(this->tile);
304
305 /* Number of this type of building on the map. */
306 case 0x44: return GetNumHouses(this->house_id, this->town);
307
308 /* Whether the town is being created or just expanded. */
309 case 0x45: return _generating_world ? 1 : 0;
310
311 /* Current animation frame. */
312 case 0x46: return IsTileType(this->tile, MP_HOUSE) ? GetAnimationFrame(this->tile) : 0;
313
314 /* Position of the house */
315 case 0x47: return TileY(this->tile) << 16 | TileX(this->tile);
316
317 /* Building counts for old houses with id = parameter. */
318 case 0x60: return parameter < NEW_HOUSE_OFFSET ? GetNumHouses(parameter, this->town) : 0;
319
320 /* Building counts for new houses with id = parameter. */
321 case 0x61: {
322 const HouseSpec *hs = HouseSpec::Get(this->house_id);
323 if (hs->grf_prop.grffile == NULL) return 0;
324
325 HouseID new_house = _house_mngr.GetID(parameter, hs->grf_prop.grffile->grfid);
326 return new_house == INVALID_HOUSE_ID ? 0 : GetNumHouses(new_house, this->town);
327 }
328
329 /* Land info for nearby tiles. */
330 case 0x62: return GetNearbyTileInformation(parameter, this->tile, this->ro.grffile->grf_version >= 8);
331
332 /* Current animation frame of nearby house tiles */
333 case 0x63: {
334 TileIndex testtile = GetNearbyTile(parameter, this->tile);
335 return IsTileType(testtile, MP_HOUSE) ? GetAnimationFrame(testtile) : 0;
336 }
337
338 /* Cargo acceptance history of nearby stations */
339 case 0x64: {
340 CargoID cid = GetCargoTranslation(parameter, this->ro.grffile);
341 if (cid == CT_INVALID) return 0;
342
343 /* Extract tile offset. */
344 int8 x_offs = GB(GetRegister(0x100), 0, 8);
345 int8 y_offs = GB(GetRegister(0x100), 8, 8);
346 TileIndex testtile = TILE_MASK(this->tile + TileDiffXY(x_offs, y_offs));
347
348 StationFinder stations(TileArea(testtile, 1, 1));
349 const StationList *sl = stations.GetStations();
350
351 /* Collect acceptance stats. */
352 uint32 res = 0;
353 for (Station * const * st_iter = sl->Begin(); st_iter != sl->End(); st_iter++) {
354 const Station *st = *st_iter;
355 if (HasBit(st->goods[cid].status, GoodsEntry::GES_EVER_ACCEPTED)) SetBit(res, 0);
356 if (HasBit(st->goods[cid].status, GoodsEntry::GES_LAST_MONTH)) SetBit(res, 1);
357 if (HasBit(st->goods[cid].status, GoodsEntry::GES_CURRENT_MONTH)) SetBit(res, 2);
358 if (HasBit(st->goods[cid].status, GoodsEntry::GES_ACCEPTED_BIGTICK)) SetBit(res, 3);
359 }
360
361 /* Cargo triggered CB 148? */
362 if (HasBit(this->watched_cargo_triggers, cid)) SetBit(res, 4);
363
364 return res;
365 }
366
367 /* Distance test for some house types */
368 case 0x65: return GetDistanceFromNearbyHouse(parameter, this->tile, this->house_id);
369
370 /* Class and ID of nearby house tile */
371 case 0x66: {
372 TileIndex testtile = GetNearbyTile(parameter, this->tile);
373 if (!IsTileType(testtile, MP_HOUSE)) return 0xFFFFFFFF;
374 HouseID nearby_house_id = GetHouseType(testtile);
375 HouseSpec *hs = HouseSpec::Get(nearby_house_id);
376 /* Information about the grf local classid if the house has a class */
377 uint houseclass = 0;
378 if (hs->class_id != HOUSE_NO_CLASS) {
379 houseclass = (hs->grf_prop.grffile == this->ro.grffile ? 1 : 2) << 8;
380 houseclass |= _class_mapping[hs->class_id].class_id;
381 }
382 /* old house type or grf-local houseid */
383 uint local_houseid = 0;
384 if (nearby_house_id < NEW_HOUSE_OFFSET) {
385 local_houseid = nearby_house_id;
386 } else {
387 local_houseid = (hs->grf_prop.grffile == this->ro.grffile ? 1 : 2) << 8;
388 local_houseid |= hs->grf_prop.local_id;
389 }
390 return houseclass << 16 | local_houseid;
391 }
392
393 /* GRFID of nearby house tile */
394 case 0x67: {
395 TileIndex testtile = GetNearbyTile(parameter, this->tile);
396 if (!IsTileType(testtile, MP_HOUSE)) return 0xFFFFFFFF;
397 HouseID house_id = GetHouseType(testtile);
398 if (house_id < NEW_HOUSE_OFFSET) return 0;
399 /* Checking the grffile information via HouseSpec doesn't work
400 * in case the newgrf was removed. */
401 return _house_mngr.GetGRFID(house_id);
402 }
403 }
404
405 DEBUG(grf, 1, "Unhandled house variable 0x%X", variable);
406
407 *available = false;
408 return UINT_MAX;
409 }
410
411 uint16 GetHouseCallback(CallbackID callback, uint32 param1, uint32 param2, HouseID house_id, Town *town, TileIndex tile,
412 bool not_yet_constructed, uint8 initial_random_bits, uint32 watched_cargo_triggers)
413 {
414 assert(IsValidTile(tile) && (not_yet_constructed || IsTileType(tile, MP_HOUSE)));
415
416 HouseResolverObject object(house_id, tile, town, callback, param1, param2,
417 not_yet_constructed, initial_random_bits, watched_cargo_triggers);
418 return object.ResolveCallback();
419 }
420
421 static void DrawTileLayout(const TileInfo *ti, const TileLayoutSpriteGroup *group, byte stage, HouseID house_id)
422 {
423 const DrawTileSprites *dts = group->ProcessRegisters(&stage);
424
425 const HouseSpec *hs = HouseSpec::Get(house_id);
426 PaletteID palette = hs->random_colour[TileHash2Bit(ti->x, ti->y)] + PALETTE_RECOLOUR_START;
427 if (HasBit(hs->callback_mask, CBM_HOUSE_COLOUR)) {
428 uint16 callback = GetHouseCallback(CBID_HOUSE_COLOUR, 0, 0, house_id, Town::GetByTile(ti->tile), ti->tile);
429 if (callback != CALLBACK_FAILED) {
430 /* If bit 14 is set, we should use a 2cc colour map, else use the callback value. */
431 palette = HasBit(callback, 14) ? GB(callback, 0, 8) + SPR_2CCMAP_BASE : callback;
432 }
433 }
434
435 SpriteID image = dts->ground.sprite;
436 PaletteID pal = dts->ground.pal;
437
438 if (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) image += stage;
439 if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += stage;
440
441 if (GB(image, 0, SPRITE_WIDTH) != 0) {
442 DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
443 }
444
445 DrawNewGRFTileSeq(ti, dts, TO_HOUSES, stage, palette);
446 }
447
448 void DrawNewHouseTile(TileInfo *ti, HouseID house_id)
449 {
450 const HouseSpec *hs = HouseSpec::Get(house_id);
451
452 if (ti->tileh != SLOPE_FLAT) {
453 bool draw_old_one = true;
454 if (HasBit(hs->callback_mask, CBM_HOUSE_DRAW_FOUNDATIONS)) {
455 /* Called to determine the type (if any) of foundation to draw for the house tile */
456 uint32 callback_res = GetHouseCallback(CBID_HOUSE_DRAW_FOUNDATIONS, 0, 0, house_id, Town::GetByTile(ti->tile), ti->tile);
457 if (callback_res != CALLBACK_FAILED) draw_old_one = ConvertBooleanCallback(hs->grf_prop.grffile, CBID_HOUSE_DRAW_FOUNDATIONS, callback_res);
458 }
459
460 if (draw_old_one) DrawFoundation(ti, FOUNDATION_LEVELED);
461 }
462
463 HouseResolverObject object(house_id, ti->tile, Town::GetByTile(ti->tile));
464
465 const SpriteGroup *group = object.Resolve();
466 if (group != NULL && group->type == SGT_TILELAYOUT) {
467 /* Limit the building stage to the number of stages supplied. */
468 const TileLayoutSpriteGroup *tlgroup = (const TileLayoutSpriteGroup *)group;
469 byte stage = GetHouseBuildingStage(ti->tile);
470 DrawTileLayout(ti, tlgroup, stage, house_id);
471 }
472 }
473
474 /* Simple wrapper for GetHouseCallback to keep the animation unified. */
475 uint16 GetSimpleHouseCallback(CallbackID callback, uint32 param1, uint32 param2, const HouseSpec *spec, Town *town, TileIndex tile, uint32 extra_data)
476 {
477 return GetHouseCallback(callback, param1, param2, spec - HouseSpec::Get(0), town, tile, false, 0, extra_data);
478 }
479
481 struct HouseAnimationBase : public AnimationBase<HouseAnimationBase, HouseSpec, Town, uint32, GetSimpleHouseCallback> {
482 static const CallbackID cb_animation_speed = CBID_HOUSE_ANIMATION_SPEED;
483 static const CallbackID cb_animation_next_frame = CBID_HOUSE_ANIMATION_NEXT_FRAME;
484
485 static const HouseCallbackMask cbm_animation_speed = CBM_HOUSE_ANIMATION_SPEED;
486 static const HouseCallbackMask cbm_animation_next_frame = CBM_HOUSE_ANIMATION_NEXT_FRAME;
487 };
488
489 void AnimateNewHouseTile(TileIndex tile)
490 {
491 const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
492 if (hs == NULL) return;
493
494 HouseAnimationBase::AnimateTile(hs, Town::GetByTile(tile), tile, HasBit(hs->extra_flags, CALLBACK_1A_RANDOM_BITS));
495 }
496
497 void AnimateNewHouseConstruction(TileIndex tile)
498 {
499 const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
500
501 if (HasBit(hs->callback_mask, CBM_HOUSE_CONSTRUCTION_STATE_CHANGE)) {
502 HouseAnimationBase::ChangeAnimationFrame(CBID_HOUSE_CONSTRUCTION_STATE_CHANGE, hs, Town::GetByTile(tile), tile, 0, 0);
503 }
504 }
505
506 bool CanDeleteHouse(TileIndex tile)
507 {
508 const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
509
510 /* Humans are always allowed to remove buildings, as is water and disasters and
511 * anyone using the scenario editor. */
512 if (Company::IsValidHumanID(_current_company) || _current_company == OWNER_WATER || _current_company == OWNER_NONE || _game_mode == GM_EDITOR || _generating_world) {
513 return true;
514 }
515
516 if (HasBit(hs->callback_mask, CBM_HOUSE_DENY_DESTRUCTION)) {
517 uint16 callback_res = GetHouseCallback(CBID_HOUSE_DENY_DESTRUCTION, 0, 0, GetHouseType(tile), Town::GetByTile(tile), tile);
518 return (callback_res == CALLBACK_FAILED || !ConvertBooleanCallback(hs->grf_prop.grffile, CBID_HOUSE_DENY_DESTRUCTION, callback_res));
519 } else {
520 return !(hs->extra_flags & BUILDING_IS_PROTECTED);
521 }
522 }
523
524 static void AnimationControl(TileIndex tile, uint16 random_bits)
525 {
526 const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
527
528 if (HasBit(hs->callback_mask, CBM_HOUSE_ANIMATION_START_STOP)) {
529 uint32 param = (hs->extra_flags & SYNCHRONISED_CALLBACK_1B) ? (GB(Random(), 0, 16) | random_bits << 16) : Random();
530 HouseAnimationBase::ChangeAnimationFrame(CBID_HOUSE_ANIMATION_START_STOP, hs, Town::GetByTile(tile), tile, param, 0);
531 }
532 }
533
534 bool NewHouseTileLoop(TileIndex tile)
535 {
536 const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
537
538 if (GetHouseProcessingTime(tile) > 0) {
539 DecHouseProcessingTime(tile);
540 return true;
541 }
542
543 TriggerHouse(tile, HOUSE_TRIGGER_TILE_LOOP);
544 if (hs->building_flags & BUILDING_HAS_1_TILE) TriggerHouse(tile, HOUSE_TRIGGER_TILE_LOOP_TOP);
545
546 if (HasBit(hs->callback_mask, CBM_HOUSE_ANIMATION_START_STOP)) {
547 /* If this house is marked as having a synchronised callback, all the
548 * tiles will have the callback called at once, rather than when the
549 * tile loop reaches them. This should only be enabled for the northern
550 * tile, or strange things will happen (here, and in TTDPatch). */
551 if (hs->extra_flags & SYNCHRONISED_CALLBACK_1B) {
552 uint16 random = GB(Random(), 0, 16);
553
554 if (hs->building_flags & BUILDING_HAS_1_TILE) AnimationControl(tile, random);
555 if (hs->building_flags & BUILDING_2_TILES_Y) AnimationControl(TILE_ADDXY(tile, 0, 1), random);
556 if (hs->building_flags & BUILDING_2_TILES_X) AnimationControl(TILE_ADDXY(tile, 1, 0), random);
557 if (hs->building_flags & BUILDING_HAS_4_TILES) AnimationControl(TILE_ADDXY(tile, 1, 1), random);
558 } else {
559 AnimationControl(tile, 0);
560 }
561 }
562
563 /* Check callback 21, which determines if a house should be destroyed. */
564 if (HasBit(hs->callback_mask, CBM_HOUSE_DESTRUCTION)) {
565 uint16 callback_res = GetHouseCallback(CBID_HOUSE_DESTRUCTION, 0, 0, GetHouseType(tile), Town::GetByTile(tile), tile);
566 if (callback_res != CALLBACK_FAILED && Convert8bitBooleanCallback(hs->grf_prop.grffile, CBID_HOUSE_DESTRUCTION, callback_res)) {
567 ClearTownHouse(Town::GetByTile(tile), tile);
568 return false;
569 }
570 }
571
572 SetHouseProcessingTime(tile, hs->processing_time);
573 MarkTileDirtyByTile(tile);
574 return true;
575 }
576
577 static void DoTriggerHouse(TileIndex tile, HouseTrigger trigger, byte base_random, bool first)
578 {
579 /* We can't trigger a non-existent building... */
580 assert(IsTileType(tile, MP_HOUSE));
581
582 HouseID hid = GetHouseType(tile);
583 HouseSpec *hs = HouseSpec::Get(hid);
584
585 if (hs->grf_prop.spritegroup[0] == NULL) return;
586
587 HouseResolverObject object(hid, tile, Town::GetByTile(tile), CBID_RANDOM_TRIGGER);
588 object.waiting_triggers = GetHouseTriggers(tile) | trigger;
589 SetHouseTriggers(tile, object.waiting_triggers); // store now for var 5F
590
591 const SpriteGroup *group = object.Resolve();
592 if (group == NULL) return;
593
594 /* Store remaining triggers. */
595 SetHouseTriggers(tile, object.GetRemainingTriggers());
596
597 /* Rerandomise bits. Scopes other than SELF are invalid for houses. For bug-to-bug-compatibility with TTDP we ignore the scope. */
598 byte new_random_bits = Random();
599 byte random_bits = GetHouseRandomBits(tile);
600 uint32 reseed = object.GetReseedSum();
601 random_bits &= ~reseed;
602 random_bits |= (first ? new_random_bits : base_random) & reseed;
603 SetHouseRandomBits(tile, random_bits);
604
605 switch (trigger) {
606 case HOUSE_TRIGGER_TILE_LOOP:
607 /* Random value already set. */
608 break;
609
610 case HOUSE_TRIGGER_TILE_LOOP_TOP:
611 if (!first) {
612 /* The top tile is marked dirty by the usual TileLoop */
613 MarkTileDirtyByTile(tile);
614 break;
615 }
616 /* Random value of first tile already set. */
617 if (hs->building_flags & BUILDING_2_TILES_Y) DoTriggerHouse(TILE_ADDXY(tile, 0, 1), trigger, random_bits, false);
618 if (hs->building_flags & BUILDING_2_TILES_X) DoTriggerHouse(TILE_ADDXY(tile, 1, 0), trigger, random_bits, false);
619 if (hs->building_flags & BUILDING_HAS_4_TILES) DoTriggerHouse(TILE_ADDXY(tile, 1, 1), trigger, random_bits, false);
620 break;
621 }
622 }
623
624 void TriggerHouse(TileIndex t, HouseTrigger trigger)
625 {
626 DoTriggerHouse(t, trigger, 0, true);
627 }
628
636 void DoWatchedCargoCallback(TileIndex tile, TileIndex origin, uint32 trigger_cargoes, uint16 random)
637 {
638 TileIndexDiffC diff = TileIndexToTileIndexDiffC(origin, tile);
639 uint32 cb_info = random << 16 | (uint8)diff.y << 8 | (uint8)diff.x;
640 HouseAnimationBase::ChangeAnimationFrame(CBID_HOUSE_WATCHED_CARGO_ACCEPTED, HouseSpec::Get(GetHouseType(tile)), Town::GetByTile(tile), tile, 0, cb_info, trigger_cargoes);
641 }
642
649 void WatchedCargoCallback(TileIndex tile, uint32 trigger_cargoes)
650 {
651 assert(IsTileType(tile, MP_HOUSE));
652 HouseID id = GetHouseType(tile);
653 const HouseSpec *hs = HouseSpec::Get(id);
654
655 trigger_cargoes &= hs->watched_cargoes;
656 /* None of the trigger cargoes is watched? */
657 if (trigger_cargoes == 0) return;
658
659 /* Same random value for all tiles of a multi-tile house. */
660 uint16 r = Random();
661
662 /* Do the callback, start at northern tile. */
663 TileIndex north = tile + GetHouseNorthPart(id);
664 hs = HouseSpec::Get(id);
665
666 DoWatchedCargoCallback(north, tile, trigger_cargoes, r);
667 if (hs->building_flags & BUILDING_2_TILES_Y) DoWatchedCargoCallback(TILE_ADDXY(north, 0, 1), tile, trigger_cargoes, r);
668 if (hs->building_flags & BUILDING_2_TILES_X) DoWatchedCargoCallback(TILE_ADDXY(north, 1, 0), tile, trigger_cargoes, r);
669 if (hs->building_flags & BUILDING_HAS_4_TILES) DoWatchedCargoCallback(TILE_ADDXY(north, 1, 1), tile, trigger_cargoes, r);
670 }
671