OpenTTD
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 
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 
101 {
102  HouseClassID class_id = HouseSpec::Get(house_id)->class_id;
103 
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 
122 {
123  HouseClassID class_id = HouseSpec::Get(house_id)->class_id;
124 
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 
178  const HouseSpec *hs;
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] = {
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 
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);
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;
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;
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 
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. */
513  return true;
514  }
515 
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 
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) {
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 
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). */
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. */
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 
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