OpenTTD
object_cmd.cpp
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1 /* $Id: object_cmd.cpp 27656 2016-09-18 14:07:52Z 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 "landscape.h"
14 #include "command_func.h"
15 #include "viewport_func.h"
16 #include "company_base.h"
17 #include "town.h"
18 #include "bridge_map.h"
19 #include "genworld.h"
20 #include "autoslope.h"
21 #include "clear_func.h"
22 #include "water.h"
23 #include "window_func.h"
24 #include "company_gui.h"
25 #include "cheat_type.h"
26 #include "object.h"
27 #include "cargopacket.h"
28 #include "core/random_func.hpp"
29 #include "core/pool_func.hpp"
30 #include "object_map.h"
31 #include "object_base.h"
32 #include "newgrf_config.h"
33 #include "newgrf_object.h"
34 #include "date_func.h"
35 #include "newgrf_debug.h"
36 #include "vehicle_func.h"
37 
38 #include "table/strings.h"
39 #include "table/object_land.h"
40 
41 #include "safeguards.h"
42 
43 ObjectPool _object_pool("Object");
45 uint16 Object::counts[NUM_OBJECTS];
46 
52 /* static */ Object *Object::GetByTile(TileIndex tile)
53 {
54  return Object::Get(GetObjectIndex(tile));
55 }
56 
64 {
65  assert(IsTileType(t, MP_OBJECT));
66  return Object::GetByTile(t)->type;
67 }
68 
71 {
73 }
74 
85 void BuildObject(ObjectType type, TileIndex tile, CompanyID owner, Town *town, uint8 view)
86 {
87  const ObjectSpec *spec = ObjectSpec::Get(type);
88 
89  TileArea ta(tile, GB(spec->size, HasBit(view, 0) ? 4 : 0, 4), GB(spec->size, HasBit(view, 0) ? 0 : 4, 4));
90  Object *o = new Object();
91  o->type = type;
92  o->location = ta;
93  o->town = town == NULL ? CalcClosestTownFromTile(tile) : town;
94  o->build_date = _date;
95  o->view = view;
96 
97  /* If nothing owns the object, the colour will be random. Otherwise
98  * get the colour from the company's livery settings. */
99  if (owner == OWNER_NONE) {
100  o->colour = Random();
101  } else {
102  const Livery *l = Company::Get(owner)->livery;
103  o->colour = l->colour1 + l->colour2 * 16;
104  }
105 
106  /* If the object wants only one colour, then give it that colour. */
107  if ((spec->flags & OBJECT_FLAG_2CC_COLOUR) == 0) o->colour &= 0xF;
108 
109  if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) {
110  uint16 res = GetObjectCallback(CBID_OBJECT_COLOUR, o->colour, 0, spec, o, tile);
111  if (res != CALLBACK_FAILED) {
112  if (res >= 0x100) ErrorUnknownCallbackResult(spec->grf_prop.grffile->grfid, CBID_OBJECT_COLOUR, res);
113  o->colour = GB(res, 0, 8);
114  }
115  }
116 
117  assert(o->town != NULL);
118 
119  TILE_AREA_LOOP(t, ta) {
121  /* Update company infrastructure counts for objects build on canals owned by nobody. */
122  if (wc == WATER_CLASS_CANAL && owner != OWNER_NONE && (IsTileOwner(tile, OWNER_NONE) || IsTileOwner(tile, OWNER_WATER))) {
123  Company::Get(owner)->infrastructure.water++;
125  }
126  MakeObject(t, owner, o->index, wc, Random());
128  }
129 
130  Object::IncTypeCount(type);
132 }
133 
139 {
140  TileArea ta = Object::GetByTile(tile)->location;
141  TILE_AREA_LOOP(t, ta) {
144  }
145 }
146 
148 #define GetCompanyHQSize GetAnimationFrame
149 
150 #define IncreaseCompanyHQSize IncreaseAnimationStage
151 
157 void UpdateCompanyHQ(TileIndex tile, uint score)
158 {
159  if (tile == INVALID_TILE) return;
160 
161  byte val;
162  (val = 0, score < 170) ||
163  (val++, score < 350) ||
164  (val++, score < 520) ||
165  (val++, score < 720) ||
166  (val++, true);
167 
168  while (GetCompanyHQSize(tile) < val) {
169  IncreaseCompanyHQSize(tile);
170  }
171 }
172 
178 {
179  Object *obj;
180  FOR_ALL_OBJECTS(obj) {
181  Owner owner = GetTileOwner(obj->location.tile);
182  /* Not the current owner, so colour doesn't change. */
183  if (owner != c->index) continue;
184 
185  const ObjectSpec *spec = ObjectSpec::GetByTile(obj->location.tile);
186  /* Using the object colour callback, so not using company colour. */
187  if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) continue;
188 
189  const Livery *l = c->livery;
190  obj->colour = ((spec->flags & OBJECT_FLAG_2CC_COLOUR) ? (l->colour2 * 16) : 0) + l->colour1;
191  }
192 }
193 
194 extern CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool allow_steep, bool check_bridge);
195 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags);
196 
206 CommandCost CmdBuildObject(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
207 {
209 
210  ObjectType type = (ObjectType)GB(p1, 0, 16);
211  if (type >= NUM_OBJECTS) return CMD_ERROR;
212  uint8 view = GB(p2, 0, 2);
213  const ObjectSpec *spec = ObjectSpec::Get(type);
214  if (_game_mode == GM_NORMAL && !spec->IsAvailable() && !_generating_world) return CMD_ERROR;
215  if ((_game_mode == GM_EDITOR || _generating_world) && !spec->WasEverAvailable()) return CMD_ERROR;
216 
217  if ((spec->flags & OBJECT_FLAG_ONLY_IN_SCENEDIT) != 0 && ((!_generating_world && _game_mode != GM_EDITOR) || _current_company != OWNER_NONE)) return CMD_ERROR;
218  if ((spec->flags & OBJECT_FLAG_ONLY_IN_GAME) != 0 && (_generating_world || _game_mode != GM_NORMAL || _current_company > MAX_COMPANIES)) return CMD_ERROR;
219  if (view >= spec->views) return CMD_ERROR;
220 
221  if (!Object::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_OBJECTS);
222  if (Town::GetNumItems() == 0) return_cmd_error(STR_ERROR_MUST_FOUND_TOWN_FIRST);
223 
224  int size_x = GB(spec->size, HasBit(view, 0) ? 4 : 0, 4);
225  int size_y = GB(spec->size, HasBit(view, 0) ? 0 : 4, 4);
226  TileArea ta(tile, size_x, size_y);
227 
228  if (type == OBJECT_OWNED_LAND) {
229  /* Owned land is special as it can be placed on any slope. */
230  cost.AddCost(DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR));
231  } else {
232  /* Check the surface to build on. At this time we can't actually execute the
233  * the CLEAR_TILE commands since the newgrf callback later on can check
234  * some information about the tiles. */
235  bool allow_water = (spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0;
236  bool allow_ground = (spec->flags & OBJECT_FLAG_NOT_ON_LAND) == 0;
237  TILE_AREA_LOOP(t, ta) {
238  if (HasTileWaterGround(t)) {
239  if (!allow_water) return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
240  if (!IsWaterTile(t)) {
241  /* Normal water tiles don't have to be cleared. For all other tile types clear
242  * the tile but leave the water. */
243  cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_NO_WATER & ~DC_EXEC, CMD_LANDSCAPE_CLEAR));
244  } else {
245  /* Can't build on water owned by another company. */
246  Owner o = GetTileOwner(t);
247  if (o != OWNER_NONE && o != OWNER_WATER) cost.AddCost(CheckOwnership(o, t));
248 
249  /* However, the tile has to be clear of vehicles. */
251  }
252  } else {
253  if (!allow_ground) return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
254  /* For non-water tiles, we'll have to clear it before building. */
255  cost.AddCost(DoCommand(t, 0, 0, flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR));
256  }
257  }
258 
259  /* So, now the surface is checked... check the slope of said surface. */
260  int allowed_z;
261  if (GetTileSlope(tile, &allowed_z) != SLOPE_FLAT) allowed_z++;
262 
263  TILE_AREA_LOOP(t, ta) {
264  uint16 callback = CALLBACK_FAILED;
266  TileIndex diff = t - tile;
267  callback = GetObjectCallback(CBID_OBJECT_LAND_SLOPE_CHECK, GetTileSlope(t), TileY(diff) << 4 | TileX(diff), spec, NULL, t, view);
268  }
269 
270  if (callback == CALLBACK_FAILED) {
271  cost.AddCost(CheckBuildableTile(t, 0, allowed_z, false, false));
272  } else {
273  /* The meaning of bit 10 is inverted for a grf version < 8. */
274  if (spec->grf_prop.grffile->grf_version < 8) ToggleBit(callback, 10);
275  CommandCost ret = GetErrorMessageFromLocationCallbackResult(callback, spec->grf_prop.grffile, STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
276  if (ret.Failed()) return ret;
277  }
278  }
279 
280  if (flags & DC_EXEC) {
281  /* This is basically a copy of the loop above with the exception that we now
282  * execute the commands and don't check for errors, since that's already done. */
283  TILE_AREA_LOOP(t, ta) {
284  if (HasTileWaterGround(t)) {
285  if (!IsWaterTile(t)) {
287  }
288  } else {
290  }
291  }
292  }
293  }
294  if (cost.Failed()) return cost;
295 
296  /* Finally do a check for bridges. */
297  TILE_AREA_LOOP(t, ta) {
298  if (IsBridgeAbove(t) && (
301  return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
302  }
303  }
304 
305  int hq_score = 0;
306  switch (type) {
307  case OBJECT_TRANSMITTER:
308  case OBJECT_LIGHTHOUSE:
309  if (!IsTileFlat(tile)) return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
310  break;
311 
312  case OBJECT_OWNED_LAND:
313  if (IsTileType(tile, MP_OBJECT) &&
314  IsTileOwner(tile, _current_company) &&
316  return_cmd_error(STR_ERROR_YOU_ALREADY_OWN_IT);
317  }
318  break;
319 
320  case OBJECT_HQ: {
322  if (c->location_of_HQ != INVALID_TILE) {
323  /* We need to persuade a bit harder to remove the old HQ. */
325  cost.AddCost(ClearTile_Object(c->location_of_HQ, flags));
326  _current_company = c->index;
327  }
328 
329  if (flags & DC_EXEC) {
330  hq_score = UpdateCompanyRatingAndValue(c, false);
331  c->location_of_HQ = tile;
333  }
334  break;
335  }
336 
337  case OBJECT_STATUE:
338  /* This may never be constructed using this method. */
339  return CMD_ERROR;
340 
341  default: // i.e. NewGRF provided.
342  break;
343  }
344 
345  if (flags & DC_EXEC) {
346  BuildObject(type, tile, _current_company, NULL, view);
347 
348  /* Make sure the HQ starts at the right size. */
349  if (type == OBJECT_HQ) UpdateCompanyHQ(tile, hq_score);
350  }
351 
352  cost.AddCost(ObjectSpec::Get(type)->GetBuildCost() * size_x * size_y);
353  return cost;
354 }
355 
356 
357 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh);
358 
359 static void DrawTile_Object(TileInfo *ti)
360 {
361  ObjectType type = GetObjectType(ti->tile);
362  const ObjectSpec *spec = ObjectSpec::Get(type);
363 
364  /* Fall back for when the object doesn't exist anymore. */
365  if (!spec->enabled) type = OBJECT_TRANSMITTER;
366 
367  if ((spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) == 0) DrawFoundation(ti, GetFoundation_Object(ti->tile, ti->tileh));
368 
369  if (type < NEW_OBJECT_OFFSET) {
370  const DrawTileSprites *dts = NULL;
371  Owner to = GetTileOwner(ti->tile);
372  PaletteID palette = to == OWNER_NONE ? PAL_NONE : COMPANY_SPRITE_COLOUR(to);
373 
374  if (type == OBJECT_HQ) {
375  TileIndex diff = ti->tile - Object::GetByTile(ti->tile)->location.tile;
376  dts = &_object_hq[GetCompanyHQSize(ti->tile) << 2 | TileY(diff) << 1 | TileX(diff)];
377  } else {
378  dts = &_objects[type];
379  }
380 
381  if (spec->flags & OBJECT_FLAG_HAS_NO_FOUNDATION) {
382  /* If an object has no foundation, but tries to draw a (flat) ground
383  * type... we have to be nice and convert that for them. */
384  switch (dts->ground.sprite) {
385  case SPR_FLAT_BARE_LAND: DrawClearLandTile(ti, 0); break;
386  case SPR_FLAT_1_THIRD_GRASS_TILE: DrawClearLandTile(ti, 1); break;
387  case SPR_FLAT_2_THIRD_GRASS_TILE: DrawClearLandTile(ti, 2); break;
388  case SPR_FLAT_GRASS_TILE: DrawClearLandTile(ti, 3); break;
389  default: DrawGroundSprite(dts->ground.sprite, palette); break;
390  }
391  } else {
392  DrawGroundSprite(dts->ground.sprite, palette);
393  }
394 
396  const DrawTileSeqStruct *dtss;
397  foreach_draw_tile_seq(dtss, dts->seq) {
399  dtss->image.sprite, palette,
400  ti->x + dtss->delta_x, ti->y + dtss->delta_y,
401  dtss->size_x, dtss->size_y,
402  dtss->size_z, ti->z + dtss->delta_z,
404  );
405  }
406  }
407  } else {
408  DrawNewObjectTile(ti, spec);
409  }
410 
411  DrawBridgeMiddle(ti);
412 }
413 
414 static int GetSlopePixelZ_Object(TileIndex tile, uint x, uint y)
415 {
416  if (IsObjectType(tile, OBJECT_OWNED_LAND)) {
417  int z;
418  Slope tileh = GetTilePixelSlope(tile, &z);
419 
420  return z + GetPartialPixelZ(x & 0xF, y & 0xF, tileh);
421  } else {
422  return GetTileMaxPixelZ(tile);
423  }
424 }
425 
426 static Foundation GetFoundation_Object(TileIndex tile, Slope tileh)
427 {
429 }
430 
436 {
438  TILE_AREA_LOOP(tile_cur, o->location) {
439  DeleteNewGRFInspectWindow(GSF_OBJECTS, tile_cur);
440 
441  MakeWaterKeepingClass(tile_cur, GetTileOwner(tile_cur));
442  }
443  delete o;
444 }
445 
446 SmallVector<ClearedObjectArea, 4> _cleared_object_areas;
447 
454 {
455  TileArea ta = TileArea(tile, 1, 1);
456 
457  const ClearedObjectArea *end = _cleared_object_areas.End();
458  for (ClearedObjectArea *coa = _cleared_object_areas.Begin(); coa != end; coa++) {
459  if (coa->area.Intersects(ta)) return coa;
460  }
461 
462  return NULL;
463 }
464 
465 static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags)
466 {
467  /* Get to the northern most tile. */
468  Object *o = Object::GetByTile(tile);
469  TileArea ta = o->location;
470 
471  ObjectType type = o->type;
472  const ObjectSpec *spec = ObjectSpec::Get(type);
473 
474  CommandCost cost(EXPENSES_CONSTRUCTION, spec->GetClearCost() * ta.w * ta.h / 5);
475  if (spec->flags & OBJECT_FLAG_CLEAR_INCOME) cost.MultiplyCost(-1); // They get an income!
476 
477  /* Towns can't remove any objects. */
478  if (_current_company == OWNER_TOWN) return CMD_ERROR;
479 
480  /* Water can remove everything! */
481  if (_current_company != OWNER_WATER) {
482  if ((flags & DC_NO_WATER) && IsTileOnWater(tile)) {
483  /* There is water under the object, treat it as water tile. */
484  return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
485  } else if (!(spec->flags & OBJECT_FLAG_AUTOREMOVE) && (flags & DC_AUTO)) {
486  /* No automatic removal by overbuilding stuff. */
487  return_cmd_error(type == OBJECT_HQ ? STR_ERROR_COMPANY_HEADQUARTERS_IN : STR_ERROR_OBJECT_IN_THE_WAY);
488  } else if (_game_mode == GM_EDITOR) {
489  /* No further limitations for the editor. */
490  } else if (GetTileOwner(tile) == OWNER_NONE) {
491  /* Owned by nobody and unremovable, so we can only remove it with brute force! */
492  if (!_cheats.magic_bulldozer.value && (spec->flags & OBJECT_FLAG_CANNOT_REMOVE) != 0) return CMD_ERROR;
493  } else if (CheckTileOwnership(tile).Failed()) {
494  /* We don't own it!. */
495  return_cmd_error(STR_ERROR_OWNED_BY);
496  } else if ((spec->flags & OBJECT_FLAG_CANNOT_REMOVE) != 0 && (spec->flags & OBJECT_FLAG_AUTOREMOVE) == 0) {
497  /* In the game editor or with cheats we can remove, otherwise we can't. */
498  if (!_cheats.magic_bulldozer.value) return CMD_ERROR;
499 
500  /* Removing with the cheat costs more in TTDPatch / the specs. */
501  cost.MultiplyCost(25);
502  }
503  } else if ((spec->flags & (OBJECT_FLAG_BUILT_ON_WATER | OBJECT_FLAG_NOT_ON_LAND)) != 0) {
504  /* Water can't remove objects that are buildable on water. */
505  return CMD_ERROR;
506  }
507 
508  switch (type) {
509  case OBJECT_HQ: {
510  Company *c = Company::Get(GetTileOwner(tile));
511  if (flags & DC_EXEC) {
512  c->location_of_HQ = INVALID_TILE; // reset HQ position
515  }
516 
517  /* cost of relocating company is 1% of company value */
519  break;
520  }
521 
522  case OBJECT_STATUE:
523  if (flags & DC_EXEC) {
524  Town *town = o->town;
525  ClrBit(town->statues, GetTileOwner(tile));
527  }
528  break;
529 
530  default:
531  break;
532  }
533 
534  ClearedObjectArea *cleared_area = _cleared_object_areas.Append();
535  cleared_area->first_tile = tile;
536  cleared_area->area = ta;
537 
538  if (flags & DC_EXEC) ReallyClearObjectTile(o);
539 
540  return cost;
541 }
542 
543 static void AddAcceptedCargo_Object(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted)
544 {
545  if (!IsObjectType(tile, OBJECT_HQ)) return;
546 
547  /* HQ accepts passenger and mail; but we have to divide the values
548  * between 4 tiles it occupies! */
549 
550  /* HQ level (depends on company performance) in the range 1..5. */
551  uint level = GetCompanyHQSize(tile) + 1;
552 
553  /* Top town building generates 10, so to make HQ interesting, the top
554  * type makes 20. */
555  acceptance[CT_PASSENGERS] += max(1U, level);
556  SetBit(*always_accepted, CT_PASSENGERS);
557 
558  /* Top town building generates 4, HQ can make up to 8. The
559  * proportion passengers:mail is different because such a huge
560  * commercial building generates unusually high amount of mail
561  * correspondence per physical visitor. */
562  acceptance[CT_MAIL] += max(1U, level / 2);
563  SetBit(*always_accepted, CT_MAIL);
564 }
565 
566 
567 static void GetTileDesc_Object(TileIndex tile, TileDesc *td)
568 {
569  const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
570  td->str = spec->name;
571  td->owner[0] = GetTileOwner(tile);
573 
574  if (spec->grf_prop.grffile != NULL) {
575  td->grf = GetGRFConfig(spec->grf_prop.grffile->grfid)->GetName();
576  }
577 }
578 
579 static void TileLoop_Object(TileIndex tile)
580 {
581  const ObjectSpec *spec = ObjectSpec::GetByTile(tile);
582  if (spec->flags & OBJECT_FLAG_ANIMATION) {
583  Object *o = Object::GetByTile(tile);
585  if (o->location.tile == tile) TriggerObjectAnimation(o, OAT_256_TICKS, spec);
586  }
587 
588  if (IsTileOnWater(tile)) TileLoop_Water(tile);
589 
590  if (!IsObjectType(tile, OBJECT_HQ)) return;
591 
592  /* HQ accepts passenger and mail; but we have to divide the values
593  * between 4 tiles it occupies! */
594 
595  /* HQ level (depends on company performance) in the range 1..5. */
596  uint level = GetCompanyHQSize(tile) + 1;
597  assert(level < 6);
598 
599  StationFinder stations(TileArea(tile, 2, 2));
600 
601  uint r = Random();
602  /* Top town buildings generate 250, so the top HQ type makes 256. */
603  if (GB(r, 0, 8) < (256 / 4 / (6 - level))) {
604  uint amt = GB(r, 0, 8) / 8 / 4 + 1;
605  if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
606  MoveGoodsToStation(CT_PASSENGERS, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
607  }
608 
609  /* Top town building generates 90, HQ can make up to 196. The
610  * proportion passengers:mail is about the same as in the acceptance
611  * equations. */
612  if (GB(r, 8, 8) < (196 / 4 / (6 - level))) {
613  uint amt = GB(r, 8, 8) / 8 / 4 + 1;
614  if (EconomyIsInRecession()) amt = (amt + 1) >> 1;
615  MoveGoodsToStation(CT_MAIL, amt, ST_HEADQUARTERS, GetTileOwner(tile), stations.GetStations());
616  }
617 }
618 
619 
620 static TrackStatus GetTileTrackStatus_Object(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
621 {
622  return 0;
623 }
624 
625 static bool ClickTile_Object(TileIndex tile)
626 {
627  if (!IsObjectType(tile, OBJECT_HQ)) return false;
628 
629  ShowCompany(GetTileOwner(tile));
630  return true;
631 }
632 
633 static void AnimateTile_Object(TileIndex tile)
634 {
635  AnimateNewObjectTile(tile);
636 }
637 
644 static bool HasTransmitter(TileIndex tile, void *user)
645 {
646  return IsObjectTypeTile(tile, OBJECT_TRANSMITTER);
647 }
648 
653 static bool TryBuildLightHouse()
654 {
655  uint maxx = MapMaxX();
656  uint maxy = MapMaxY();
657  uint r = Random();
658 
659  /* Scatter the lighthouses more evenly around the perimeter */
660  int perimeter = (GB(r, 16, 16) % (2 * (maxx + maxy))) - maxy;
661  DiagDirection dir;
662  for (dir = DIAGDIR_NE; perimeter > 0; dir++) {
663  perimeter -= (DiagDirToAxis(dir) == AXIS_X) ? maxx : maxy;
664  }
665 
666  TileIndex tile;
667  switch (dir) {
668  default:
669  case DIAGDIR_NE: tile = TileXY(maxx - 1, r % maxy); break;
670  case DIAGDIR_SE: tile = TileXY(r % maxx, 1); break;
671  case DIAGDIR_SW: tile = TileXY(1, r % maxy); break;
672  case DIAGDIR_NW: tile = TileXY(r % maxx, maxy - 1); break;
673  }
674 
675  /* Only build lighthouses at tiles where the border is sea. */
676  if (!IsTileType(tile, MP_WATER)) return false;
677 
678  for (int j = 0; j < 19; j++) {
679  int h;
680  if (IsTileType(tile, MP_CLEAR) && IsTileFlat(tile, &h) && h <= 2 && !IsBridgeAbove(tile)) {
682  assert(tile < MapSize());
683  return true;
684  }
685  tile += TileOffsByDiagDir(dir);
686  if (!IsValidTile(tile)) return false;
687  }
688  return false;
689 }
690 
695 static bool TryBuildTransmitter()
696 {
697  TileIndex tile = RandomTile();
698  int h;
699  if (IsTileType(tile, MP_CLEAR) && IsTileFlat(tile, &h) && h >= 4 && !IsBridgeAbove(tile)) {
700  TileIndex t = tile;
701  if (CircularTileSearch(&t, 9, HasTransmitter, NULL)) return false;
702 
704  return true;
705  }
706  return false;
707 }
708 
709 void GenerateObjects()
710 {
711  /* Set a guestimate on how much we progress */
713 
714  /* Determine number of water tiles at map border needed for freeform_edges */
715  uint num_water_tiles = 0;
717  for (uint x = 0; x < MapMaxX(); x++) {
718  if (IsTileType(TileXY(x, 1), MP_WATER)) num_water_tiles++;
719  if (IsTileType(TileXY(x, MapMaxY() - 1), MP_WATER)) num_water_tiles++;
720  }
721  for (uint y = 1; y < MapMaxY() - 1; y++) {
722  if (IsTileType(TileXY(1, y), MP_WATER)) num_water_tiles++;
723  if (IsTileType(TileXY(MapMaxX() - 1, y), MP_WATER)) num_water_tiles++;
724  }
725  }
726 
727  /* Iterate over all possible object types */
728  for (uint i = 0; i < NUM_OBJECTS; i++) {
729  const ObjectSpec *spec = ObjectSpec::Get(i);
730 
731  /* Continue, if the object was never available till now or shall not be placed */
732  if (!spec->WasEverAvailable() || spec->generate_amount == 0) continue;
733 
734  uint16 amount = spec->generate_amount;
735 
736  /* Scale by map size */
738  /* Scale the amount of lighthouses with the amount of land at the borders.
739  * The -6 is because the top borders are MP_VOID (-2) and all corners
740  * are counted twice (-4). */
741  amount = ScaleByMapSize1D(amount * num_water_tiles) / (2 * MapMaxY() + 2 * MapMaxX() - 6);
742  } else if (spec->flags & OBJECT_FLAG_SCALE_BY_WATER) {
743  amount = ScaleByMapSize1D(amount);
744  } else {
745  amount = ScaleByMapSize(amount);
746  }
747 
748  /* Now try to place the requested amount of this object */
749  for (uint j = ScaleByMapSize(1000); j != 0 && amount != 0 && Object::CanAllocateItem(); j--) {
750  switch (i) {
751  case OBJECT_TRANSMITTER:
752  if (TryBuildTransmitter()) amount--;
753  break;
754 
755  case OBJECT_LIGHTHOUSE:
756  if (TryBuildLightHouse()) amount--;
757  break;
758 
759  default:
760  uint8 view = RandomRange(spec->views);
761  if (CmdBuildObject(RandomTile(), DC_EXEC | DC_AUTO | DC_NO_TEST_TOWN_RATING | DC_NO_MODIFY_TOWN_RATING, i, view, NULL).Succeeded()) amount--;
762  break;
763  }
764  }
766  }
767 }
768 
769 static void ChangeTileOwner_Object(TileIndex tile, Owner old_owner, Owner new_owner)
770 {
771  if (!IsTileOwner(tile, old_owner)) return;
772 
773  bool do_clear = false;
774 
775  if (IsObjectType(tile, OBJECT_OWNED_LAND) && new_owner != INVALID_OWNER) {
776  SetTileOwner(tile, new_owner);
777  } else if (IsObjectType(tile, OBJECT_STATUE)) {
778  Town *t = Object::GetByTile(tile)->town;
779  ClrBit(t->statues, old_owner);
780  if (new_owner != INVALID_OWNER && !HasBit(t->statues, new_owner)) {
781  /* Transfer ownership to the new company */
782  SetBit(t->statues, new_owner);
783  SetTileOwner(tile, new_owner);
784  } else {
785  do_clear = true;
786  }
787 
789  } else {
790  do_clear = true;
791  }
792 
793  if (do_clear) {
795  /* When clearing objects, they may turn into canal, which may require transfering ownership. */
796  ChangeTileOwner(tile, old_owner, new_owner);
797  }
798 }
799 
800 static CommandCost TerraformTile_Object(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
801 {
802  ObjectType type = GetObjectType(tile);
803 
804  if (type == OBJECT_OWNED_LAND) {
805  /* Owned land remains unsold */
806  CommandCost ret = CheckTileOwnership(tile);
807  if (ret.Succeeded()) return CommandCost();
808  } else if (AutoslopeEnabled() && type != OBJECT_TRANSMITTER && type != OBJECT_LIGHTHOUSE) {
809  /* Behaviour:
810  * - Both new and old slope must not be steep.
811  * - TileMaxZ must not be changed.
812  * - Allow autoslope by default.
813  * - Disallow autoslope if callback succeeds and returns non-zero.
814  */
815  Slope tileh_old = GetTileSlope(tile);
816  /* TileMaxZ must not be changed. Slopes must not be steep. */
817  if (!IsSteepSlope(tileh_old) && !IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
818  const ObjectSpec *spec = ObjectSpec::Get(type);
819 
820  /* Call callback 'disable autosloping for objects'. */
821  if (HasBit(spec->callback_mask, CBM_OBJ_AUTOSLOPE)) {
822  /* If the callback fails, allow autoslope. */
823  uint16 res = GetObjectCallback(CBID_OBJECT_AUTOSLOPE, 0, 0, spec, Object::GetByTile(tile), tile);
824  if (res == CALLBACK_FAILED || !ConvertBooleanCallback(spec->grf_prop.grffile, CBID_OBJECT_AUTOSLOPE, res)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
825  } else if (spec->enabled) {
826  /* allow autoslope */
827  return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
828  }
829  }
830  }
831 
832  return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
833 }
834 
835 extern const TileTypeProcs _tile_type_object_procs = {
836  DrawTile_Object, // draw_tile_proc
837  GetSlopePixelZ_Object, // get_slope_z_proc
838  ClearTile_Object, // clear_tile_proc
839  AddAcceptedCargo_Object, // add_accepted_cargo_proc
840  GetTileDesc_Object, // get_tile_desc_proc
841  GetTileTrackStatus_Object, // get_tile_track_status_proc
842  ClickTile_Object, // click_tile_proc
843  AnimateTile_Object, // animate_tile_proc
844  TileLoop_Object, // tile_loop_proc
845  ChangeTileOwner_Object, // change_tile_owner_proc
846  NULL, // add_produced_cargo_proc
847  NULL, // vehicle_enter_tile_proc
848  GetFoundation_Object, // get_foundation_proc
849  TerraformTile_Object, // terraform_tile_proc
850 };