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road_cmd.cpp
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1 /* $Id: road_cmd.cpp 26955 2014-10-04 19:23:43Z rubidium $ */
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 "cmd_helper.h"
14 #include "road_internal.h"
15 #include "viewport_func.h"
16 #include "command_func.h"
17 #include "pathfinder/yapf/yapf_cache.h"
18 #include "depot_base.h"
19 #include "newgrf.h"
20 #include "autoslope.h"
21 #include "tunnelbridge_map.h"
22 #include "strings_func.h"
23 #include "vehicle_func.h"
24 #include "sound_func.h"
25 #include "tunnelbridge.h"
26 #include "cheat_type.h"
27 #include "effectvehicle_func.h"
28 #include "effectvehicle_base.h"
29 #include "elrail_func.h"
30 #include "roadveh.h"
31 #include "town.h"
32 #include "company_base.h"
33 #include "core/random_func.hpp"
34 #include "newgrf_railtype.h"
35 #include "date_func.h"
36 #include "genworld.h"
37 #include "company_gui.h"
38
39 #include "table/strings.h"
40
41 #include "safeguards.h"
42
47 bool RoadVehiclesAreBuilt()
48 {
49 const RoadVehicle *rv;
50 FOR_ALL_ROADVEHICLES(rv) return true;
51
52 return false;
53 }
54
56 static const RoadBits _invalid_tileh_slopes_road[2][15] = {
57 /* The inverse of the mixable RoadBits on a leveled slope */
58 {
59 ROAD_NONE, // SLOPE_FLAT
60 ROAD_NE | ROAD_SE, // SLOPE_W
61 ROAD_NE | ROAD_NW, // SLOPE_S
62
63 ROAD_NE, // SLOPE_SW
64 ROAD_NW | ROAD_SW, // SLOPE_E
65 ROAD_NONE, // SLOPE_EW
66
67 ROAD_NW, // SLOPE_SE
68 ROAD_NONE, // SLOPE_WSE
69 ROAD_SE | ROAD_SW, // SLOPE_N
70
71 ROAD_SE, // SLOPE_NW
72 ROAD_NONE, // SLOPE_NS
73 ROAD_NONE, // SLOPE_ENW
74
75 ROAD_SW, // SLOPE_NE
76 ROAD_NONE, // SLOPE_SEN
77 ROAD_NONE // SLOPE_NWS
78 },
79 /* The inverse of the allowed straight roads on a slope
80 * (with and without a foundation). */
81 {
82 ROAD_NONE, // SLOPE_FLAT
83 ROAD_NONE, // SLOPE_W Foundation
84 ROAD_NONE, // SLOPE_S Foundation
85
86 ROAD_Y, // SLOPE_SW
87 ROAD_NONE, // SLOPE_E Foundation
88 ROAD_ALL, // SLOPE_EW
89
90 ROAD_X, // SLOPE_SE
91 ROAD_ALL, // SLOPE_WSE
92 ROAD_NONE, // SLOPE_N Foundation
93
94 ROAD_X, // SLOPE_NW
95 ROAD_ALL, // SLOPE_NS
96 ROAD_ALL, // SLOPE_ENW
97
98 ROAD_Y, // SLOPE_NE
99 ROAD_ALL, // SLOPE_SEN
100 ROAD_ALL // SLOPE_NW
101 }
102 };
103
104 static Foundation GetRoadFoundation(Slope tileh, RoadBits bits);
105
116 CommandCost CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, Owner owner, RoadType rt, DoCommandFlag flags, bool town_check)
117 {
118 if (_game_mode == GM_EDITOR || remove == ROAD_NONE) return CommandCost();
119
120 /* Water can always flood and towns can always remove "normal" road pieces.
121 * Towns are not be allowed to remove non "normal" road pieces, like tram
122 * tracks as that would result in trams that cannot turn. */
123 if (_current_company == OWNER_WATER ||
124 (rt == ROADTYPE_ROAD && !Company::IsValidID(_current_company))) return CommandCost();
125
126 /* Only do the special processing if the road is owned
127 * by a town */
128 if (owner != OWNER_TOWN) {
129 if (owner == OWNER_NONE) return CommandCost();
130 CommandCost ret = CheckOwnership(owner);
131 return ret;
132 }
133
134 if (!town_check) return CommandCost();
135
136 if (_cheats.magic_bulldozer.value) return CommandCost();
137
138 Town *t = ClosestTownFromTile(tile, UINT_MAX);
139 if (t == NULL) return CommandCost();
140
141 /* check if you're allowed to remove the street owned by a town
142 * removal allowance depends on difficulty setting */
143 CommandCost ret = CheckforTownRating(flags, t, ROAD_REMOVE);
144 if (ret.Failed()) return ret;
145
146 /* Get a bitmask of which neighbouring roads has a tile */
147 RoadBits n = ROAD_NONE;
148 RoadBits present = GetAnyRoadBits(tile, rt);
149 if ((present & ROAD_NE) && (GetAnyRoadBits(TILE_ADDXY(tile, -1, 0), rt) & ROAD_SW)) n |= ROAD_NE;
150 if ((present & ROAD_SE) && (GetAnyRoadBits(TILE_ADDXY(tile, 0, 1), rt) & ROAD_NW)) n |= ROAD_SE;
151 if ((present & ROAD_SW) && (GetAnyRoadBits(TILE_ADDXY(tile, 1, 0), rt) & ROAD_NE)) n |= ROAD_SW;
152 if ((present & ROAD_NW) && (GetAnyRoadBits(TILE_ADDXY(tile, 0, -1), rt) & ROAD_SE)) n |= ROAD_NW;
153
154 int rating_decrease = RATING_ROAD_DOWN_STEP_EDGE;
155 /* If 0 or 1 bits are set in n, or if no bits that match the bits to remove,
156 * then allow it */
157 if (KillFirstBit(n) != ROAD_NONE && (n & remove) != ROAD_NONE) {
158 /* you can remove all kind of roads with extra dynamite */
159 if (!_settings_game.construction.extra_dynamite) {
160 SetDParam(0, t->index);
161 return_cmd_error(STR_ERROR_LOCAL_AUTHORITY_REFUSES_TO_ALLOW_THIS);
162 }
163 rating_decrease = RATING_ROAD_DOWN_STEP_INNER;
164 }
165 ChangeTownRating(t, rating_decrease, RATING_ROAD_MINIMUM, flags);
166
167 return CommandCost();
168 }
169
170
180 static CommandCost RemoveRoad(TileIndex tile, DoCommandFlag flags, RoadBits pieces, RoadType rt, bool crossing_check, bool town_check = true)
181 {
182 RoadTypes rts = GetRoadTypes(tile);
183 /* The tile doesn't have the given road type */
184 if (!HasBit(rts, rt)) return_cmd_error(rt == ROADTYPE_TRAM ? STR_ERROR_THERE_IS_NO_TRAMWAY : STR_ERROR_THERE_IS_NO_ROAD);
185
186 switch (GetTileType(tile)) {
187 case MP_ROAD: {
188 CommandCost ret = EnsureNoVehicleOnGround(tile);
189 if (ret.Failed()) return ret;
190 break;
191 }
192
193 case MP_STATION: {
194 if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;
195
196 CommandCost ret = EnsureNoVehicleOnGround(tile);
197 if (ret.Failed()) return ret;
198 break;
199 }
200
201 case MP_TUNNELBRIDGE: {
202 if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) return CMD_ERROR;
203 CommandCost ret = TunnelBridgeIsFree(tile, GetOtherTunnelBridgeEnd(tile));
204 if (ret.Failed()) return ret;
205 break;
206 }
207
208 default:
209 return CMD_ERROR;
210 }
211
212 CommandCost ret = CheckAllowRemoveRoad(tile, pieces, GetRoadOwner(tile, rt), rt, flags, town_check);
213 if (ret.Failed()) return ret;
214
215 if (!IsTileType(tile, MP_ROAD)) {
216 /* If it's the last roadtype, just clear the whole tile */
217 if (rts == RoadTypeToRoadTypes(rt)) return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
218
219 CommandCost cost(EXPENSES_CONSTRUCTION);
220 if (IsTileType(tile, MP_TUNNELBRIDGE)) {
221 /* Removing any roadbit in the bridge axis removes the roadtype (that's the behaviour remove-long-roads needs) */
222 if ((AxisToRoadBits(DiagDirToAxis(GetTunnelBridgeDirection(tile))) & pieces) == ROAD_NONE) return_cmd_error(rt == ROADTYPE_TRAM ? STR_ERROR_THERE_IS_NO_TRAMWAY : STR_ERROR_THERE_IS_NO_ROAD);
223
224 TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
225 /* Pay for *every* tile of the bridge or tunnel */
226 uint len = GetTunnelBridgeLength(other_end, tile) + 2;
227 cost.AddCost(len * _price[PR_CLEAR_ROAD]);
228 if (flags & DC_EXEC) {
229 Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
230 if (c != NULL) {
231 /* A full diagonal road tile has two road bits. */
232 c->infrastructure.road[rt] -= len * 2 * TUNNELBRIDGE_TRACKBIT_FACTOR;
233 DirtyCompanyInfrastructureWindows(c->index);
234 }
235
236 SetRoadTypes(other_end, GetRoadTypes(other_end) & ~RoadTypeToRoadTypes(rt));
237 SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
238
239 /* If the owner of the bridge sells all its road, also move the ownership
240 * to the owner of the other roadtype. */
241 RoadType other_rt = (rt == ROADTYPE_ROAD) ? ROADTYPE_TRAM : ROADTYPE_ROAD;
242 Owner other_owner = GetRoadOwner(tile, other_rt);
243 if (other_owner != GetTileOwner(tile)) {
244 SetTileOwner(tile, other_owner);
245 SetTileOwner(other_end, other_owner);
246 }
247
248 /* Mark tiles dirty that have been repaved */
249 MarkTileDirtyByTile(tile);
250 MarkTileDirtyByTile(other_end);
251 if (IsBridge(tile)) {
252 TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
253
254 for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
255 }
256 }
257 } else {
258 assert(IsDriveThroughStopTile(tile));
259 cost.AddCost(_price[PR_CLEAR_ROAD] * 2);
260 if (flags & DC_EXEC) {
261 Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
262 if (c != NULL) {
263 /* A full diagonal road tile has two road bits. */
264 c->infrastructure.road[rt] -= 2;
265 DirtyCompanyInfrastructureWindows(c->index);
266 }
267 SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
268 MarkTileDirtyByTile(tile);
269 }
270 }
271 return cost;
272 }
273
274 switch (GetRoadTileType(tile)) {
275 case ROAD_TILE_NORMAL: {
276 Slope tileh = GetTileSlope(tile);
277
278 /* Steep slopes behave the same as slopes with one corner raised. */
279 if (IsSteepSlope(tileh)) {
280 tileh = SlopeWithOneCornerRaised(GetHighestSlopeCorner(tileh));
281 }
282
283 RoadBits present = GetRoadBits(tile, rt);
284 const RoadBits other = GetOtherRoadBits(tile, rt);
285 const Foundation f = GetRoadFoundation(tileh, present);
286
287 if (HasRoadWorks(tile) && _current_company != OWNER_WATER) return_cmd_error(STR_ERROR_ROAD_WORKS_IN_PROGRESS);
288
289 /* Autocomplete to a straight road
290 * @li if the bits of the other roadtypes result in another foundation
291 * @li if build on slopes is disabled */
292 if ((IsStraightRoad(other) && (other & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) != ROAD_NONE) ||
293 (tileh != SLOPE_FLAT && !_settings_game.construction.build_on_slopes)) {
294 pieces |= MirrorRoadBits(pieces);
295 }
296
297 /* limit the bits to delete to the existing bits. */
298 pieces &= present;
299 if (pieces == ROAD_NONE) return_cmd_error(rt == ROADTYPE_TRAM ? STR_ERROR_THERE_IS_NO_TRAMWAY : STR_ERROR_THERE_IS_NO_ROAD);
300
301 /* Now set present what it will be after the remove */
302 present ^= pieces;
303
304 /* Check for invalid RoadBit combinations on slopes */
305 if (tileh != SLOPE_FLAT && present != ROAD_NONE &&
306 (present & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) == present) {
307 return CMD_ERROR;
308 }
309
310 if (flags & DC_EXEC) {
311 if (HasRoadWorks(tile)) {
312 /* flooding tile with road works, don't forget to remove the effect vehicle too */
313 assert(_current_company == OWNER_WATER);
314 EffectVehicle *v;
315 FOR_ALL_EFFECTVEHICLES(v) {
316 if (TileVirtXY(v->x_pos, v->y_pos) == tile) {
317 delete v;
318 }
319 }
320 }
321
322 Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
323 if (c != NULL) {
324 c->infrastructure.road[rt] -= CountBits(pieces);
325 DirtyCompanyInfrastructureWindows(c->index);
326 }
327
328 if (present == ROAD_NONE) {
329 RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
330 if (rts == ROADTYPES_NONE) {
331 /* Includes MarkTileDirtyByTile() */
332 DoClearSquare(tile);
333 } else {
334 if (rt == ROADTYPE_ROAD && IsRoadOwner(tile, ROADTYPE_ROAD, OWNER_TOWN)) {
335 /* Update nearest-town index */
336 const Town *town = CalcClosestTownFromTile(tile);
337 SetTownIndex(tile, town == NULL ? (TownID)INVALID_TOWN : town->index);
338 }
339 SetRoadBits(tile, ROAD_NONE, rt);
340 SetRoadTypes(tile, rts);
341 MarkTileDirtyByTile(tile);
342 }
343 } else {
344 /* When bits are removed, you *always* end up with something that
345 * is not a complete straight road tile. However, trams do not have
346 * onewayness, so they cannot remove it either. */
347 if (rt != ROADTYPE_TRAM) SetDisallowedRoadDirections(tile, DRD_NONE);
348 SetRoadBits(tile, present, rt);
349 MarkTileDirtyByTile(tile);
350 }
351 }
352
353 CommandCost cost(EXPENSES_CONSTRUCTION, CountBits(pieces) * _price[PR_CLEAR_ROAD]);
354 /* If we build a foundation we have to pay for it. */
355 if (f == FOUNDATION_NONE && GetRoadFoundation(tileh, present) != FOUNDATION_NONE) cost.AddCost(_price[PR_BUILD_FOUNDATION]);
356
357 return cost;
358 }
359
360 case ROAD_TILE_CROSSING: {
361 if (pieces & ComplementRoadBits(GetCrossingRoadBits(tile))) {
362 return CMD_ERROR;
363 }
364
365 /* Don't allow road to be removed from the crossing when there is tram;
366 * we can't draw the crossing without roadbits ;) */
367 if (rt == ROADTYPE_ROAD && HasTileRoadType(tile, ROADTYPE_TRAM) && (flags & DC_EXEC || crossing_check)) return CMD_ERROR;
368
369 if (flags & DC_EXEC) {
370 Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
371 if (c != NULL) {
372 /* A full diagonal road tile has two road bits. */
373 c->infrastructure.road[rt] -= 2;
374 DirtyCompanyInfrastructureWindows(c->index);
375 }
376
377 Track railtrack = GetCrossingRailTrack(tile);
378 RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
379 if (rts == ROADTYPES_NONE) {
380 TrackBits tracks = GetCrossingRailBits(tile);
381 bool reserved = HasCrossingReservation(tile);
382 MakeRailNormal(tile, GetTileOwner(tile), tracks, GetRailType(tile));
383 if (reserved) SetTrackReservation(tile, tracks);
384
385 /* Update rail count for level crossings. The plain track should still be accounted
386 * for, so only subtract the difference to the level crossing cost. */
387 c = Company::GetIfValid(GetTileOwner(tile));
388 if (c != NULL) c->infrastructure.rail[GetRailType(tile)] -= LEVELCROSSING_TRACKBIT_FACTOR - 1;
389 } else {
390 SetRoadTypes(tile, rts);
391 }
392 MarkTileDirtyByTile(tile);
393 YapfNotifyTrackLayoutChange(tile, railtrack);
394 }
395 return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_ROAD] * 2);
396 }
397
398 default:
399 case ROAD_TILE_DEPOT:
400 return CMD_ERROR;
401 }
402 }
403
404
416 static CommandCost CheckRoadSlope(Slope tileh, RoadBits *pieces, RoadBits existing, RoadBits other)
417 {
418 /* Remove already build pieces */
419 CLRBITS(*pieces, existing);
420
421 /* If we can't build anything stop here */
422 if (*pieces == ROAD_NONE) return CMD_ERROR;
423
424 /* All RoadBit combos are valid on flat land */
425 if (tileh == SLOPE_FLAT) return CommandCost();
426
427 /* Steep slopes behave the same as slopes with one corner raised. */
428 if (IsSteepSlope(tileh)) {
429 tileh = SlopeWithOneCornerRaised(GetHighestSlopeCorner(tileh));
430 }
431
432 /* Save the merge of all bits of the current type */
433 RoadBits type_bits = existing | *pieces;
434
435 /* Roads on slopes */
436 if (_settings_game.construction.build_on_slopes && (_invalid_tileh_slopes_road[0][tileh] & (other | type_bits)) == ROAD_NONE) {
437
438 /* If we add leveling we've got to pay for it */
439 if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
440
441 return CommandCost();
442 }
443
444 /* Autocomplete uphill roads */
445 *pieces |= MirrorRoadBits(*pieces);
446 type_bits = existing | *pieces;
447
448 /* Uphill roads */
449 if (IsStraightRoad(type_bits) && (other == type_bits || other == ROAD_NONE) &&
450 (_invalid_tileh_slopes_road[1][tileh] & (other | type_bits)) == ROAD_NONE) {
451
452 /* Slopes with foundation ? */
453 if (IsSlopeWithOneCornerRaised(tileh)) {
454
455 /* Prevent build on slopes if it isn't allowed */
456 if (_settings_game.construction.build_on_slopes) {
457
458 /* If we add foundation we've got to pay for it */
459 if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
460
461 return CommandCost();
462 }
463 } else {
464 if (HasExactlyOneBit(existing) && GetRoadFoundation(tileh, existing) == FOUNDATION_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
465 return CommandCost();
466 }
467 }
468 return CMD_ERROR;
469 }
470
482 CommandCost CmdBuildRoad(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
483 {
484 CompanyID company = _current_company;
485 CommandCost cost(EXPENSES_CONSTRUCTION);
486
487 RoadBits existing = ROAD_NONE;
488 RoadBits other_bits = ROAD_NONE;
489
490 /* Road pieces are max 4 bitset values (NE, NW, SE, SW) and town can only be non-zero
491 * if a non-company is building the road */
492 if ((Company::IsValidID(company) && p2 != 0) || (company == OWNER_TOWN && !Town::IsValidID(p2)) || (company == OWNER_DEITY && p2 != 0)) return CMD_ERROR;
493 if (company != OWNER_TOWN) {
494 const Town *town = CalcClosestTownFromTile(tile);
495 p2 = (town != NULL) ? town->index : (TownID)INVALID_TOWN;
496
497 if (company == OWNER_DEITY) {
498 company = OWNER_TOWN;
499
500 /* If we are not within a town, we are not owned by the town */
501 if (town == NULL || DistanceSquare(tile, town->xy) > town->cache.squared_town_zone_radius[HZB_TOWN_EDGE]) {
502 company = OWNER_NONE;
503 }
504 }
505 }
506
507 RoadBits pieces = Extract<RoadBits, 0, 4>(p1);
508
509 /* do not allow building 'zero' road bits, code wouldn't handle it */
510 if (pieces == ROAD_NONE) return CMD_ERROR;
511
512 RoadType rt = Extract<RoadType, 4, 2>(p1);
513 if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
514
515 DisallowedRoadDirections toggle_drd = Extract<DisallowedRoadDirections, 6, 2>(p1);
516
517 Slope tileh = GetTileSlope(tile);
518
519 bool need_to_clear = false;
520 switch (GetTileType(tile)) {
521 case MP_ROAD:
522 switch (GetRoadTileType(tile)) {
523 case ROAD_TILE_NORMAL: {
524 if (HasRoadWorks(tile)) return_cmd_error(STR_ERROR_ROAD_WORKS_IN_PROGRESS);
525
526 other_bits = GetOtherRoadBits(tile, rt);
527 if (!HasTileRoadType(tile, rt)) break;
528
529 existing = GetRoadBits(tile, rt);
530 bool crossing = !IsStraightRoad(existing | pieces);
531 if (rt != ROADTYPE_TRAM && (GetDisallowedRoadDirections(tile) != DRD_NONE || toggle_drd != DRD_NONE) && crossing) {
532 /* Junctions cannot be one-way */
533 return_cmd_error(STR_ERROR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
534 }
535 if ((existing & pieces) == pieces) {
536 /* We only want to set the (dis)allowed road directions */
537 if (toggle_drd != DRD_NONE && rt != ROADTYPE_TRAM) {
538 if (crossing) return_cmd_error(STR_ERROR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
539
540 Owner owner = GetRoadOwner(tile, ROADTYPE_ROAD);
541 if (owner != OWNER_NONE) {
542 CommandCost ret = CheckOwnership(owner, tile);
543 if (ret.Failed()) return ret;
544 }
545
546 DisallowedRoadDirections dis_existing = GetDisallowedRoadDirections(tile);
547 DisallowedRoadDirections dis_new = dis_existing ^ toggle_drd;
548
549 /* We allow removing disallowed directions to break up
550 * deadlocks, but adding them can break articulated
551 * vehicles. As such, only when less is disallowed,
552 * i.e. bits are removed, we skip the vehicle check. */
553 if (CountBits(dis_existing) <= CountBits(dis_new)) {
554 CommandCost ret = EnsureNoVehicleOnGround(tile);
555 if (ret.Failed()) return ret;
556 }
557
558 /* Ignore half built tiles */
559 if ((flags & DC_EXEC) && rt != ROADTYPE_TRAM && IsStraightRoad(existing)) {
560 SetDisallowedRoadDirections(tile, dis_new);
561 MarkTileDirtyByTile(tile);
562 }
563 return CommandCost();
564 }
565 return_cmd_error(STR_ERROR_ALREADY_BUILT);
566 }
567 break;
568 }
569
570 case ROAD_TILE_CROSSING:
571 other_bits = GetCrossingRoadBits(tile);
572 if (pieces & ComplementRoadBits(other_bits)) goto do_clear;
573 pieces = other_bits; // we need to pay for both roadbits
574
575 if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
576 break;
577
578 case ROAD_TILE_DEPOT:
579 if ((GetAnyRoadBits(tile, rt) & pieces) == pieces) return_cmd_error(STR_ERROR_ALREADY_BUILT);
580 goto do_clear;
581
582 default: NOT_REACHED();
583 }
584 break;
585
586 case MP_RAILWAY: {
587 if (IsSteepSlope(tileh)) {
588 return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
589 }
590
591 /* Level crossings may only be built on these slopes */
592 if (!HasBit(VALID_LEVEL_CROSSING_SLOPES, tileh)) {
593 return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
594 }
595
596 if (GetRailTileType(tile) != RAIL_TILE_NORMAL) goto do_clear;
597
598 if (RailNoLevelCrossings(GetRailType(tile))) {
599 return_cmd_error(STR_ERROR_CROSSING_DISALLOWED);
600 }
601
602 Axis roaddir;
603 switch (GetTrackBits(tile)) {
604 case TRACK_BIT_X:
605 if (pieces & ROAD_X) goto do_clear;
606 roaddir = AXIS_Y;
607 break;
608
609 case TRACK_BIT_Y:
610 if (pieces & ROAD_Y) goto do_clear;
611 roaddir = AXIS_X;
612 break;
613
614 default: goto do_clear;
615 }
616
617 CommandCost ret = EnsureNoVehicleOnGround(tile);
618 if (ret.Failed()) return ret;
619
620 if (flags & DC_EXEC) {
621 Track railtrack = AxisToTrack(OtherAxis(roaddir));
622 YapfNotifyTrackLayoutChange(tile, railtrack);
623 /* Update company infrastructure counts. A level crossing has two road bits. */
624 Company *c = Company::GetIfValid(company);
625 if (c != NULL) {
626 c->infrastructure.road[rt] += 2;
627 if (rt != ROADTYPE_ROAD) c->infrastructure.road[ROADTYPE_ROAD] += 2;
628 DirtyCompanyInfrastructureWindows(company);
629 }
630 /* Update rail count for level crossings. The plain track is already
631 * counted, so only add the difference to the level crossing cost. */
632 c = Company::GetIfValid(GetTileOwner(tile));
633 if (c != NULL) c->infrastructure.rail[GetRailType(tile)] += LEVELCROSSING_TRACKBIT_FACTOR - 1;
634
635 /* Always add road to the roadtypes (can't draw without it) */
636 bool reserved = HasBit(GetRailReservationTrackBits(tile), railtrack);
637 MakeRoadCrossing(tile, company, company, GetTileOwner(tile), roaddir, GetRailType(tile), RoadTypeToRoadTypes(rt) | ROADTYPES_ROAD, p2);
638 SetCrossingReservation(tile, reserved);
639 UpdateLevelCrossing(tile, false);
640 MarkTileDirtyByTile(tile);
641 }
642 return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_ROAD] * (rt == ROADTYPE_ROAD ? 2 : 4));
643 }
644
645 case MP_STATION: {
646 if ((GetAnyRoadBits(tile, rt) & pieces) == pieces) return_cmd_error(STR_ERROR_ALREADY_BUILT);
647 if (!IsDriveThroughStopTile(tile)) goto do_clear;
648
649 RoadBits curbits = AxisToRoadBits(DiagDirToAxis(GetRoadStopDir(tile)));
650 if (pieces & ~curbits) goto do_clear;
651 pieces = curbits; // we need to pay for both roadbits
652
653 if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
654 break;
655 }
656
657 case MP_TUNNELBRIDGE: {
658 if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) goto do_clear;
659 /* Only allow building the outern roadbit, so building long roads stops at existing bridges */
660 if (MirrorRoadBits(DiagDirToRoadBits(GetTunnelBridgeDirection(tile))) != pieces) goto do_clear;
661 if (HasTileRoadType(tile, rt)) return_cmd_error(STR_ERROR_ALREADY_BUILT);
662 /* Don't allow adding roadtype to the bridge/tunnel when vehicles are already driving on it */
663 CommandCost ret = TunnelBridgeIsFree(tile, GetOtherTunnelBridgeEnd(tile));
664 if (ret.Failed()) return ret;
665 break;
666 }
667
668 default: {
669 do_clear:;
670 need_to_clear = true;
671 break;
672 }
673 }
674
675 if (need_to_clear) {
676 CommandCost ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
677 if (ret.Failed()) return ret;
678 cost.AddCost(ret);
679 }
680
681 if (other_bits != pieces) {
682 /* Check the foundation/slopes when adding road/tram bits */
683 CommandCost ret = CheckRoadSlope(tileh, &pieces, existing, other_bits);
684 /* Return an error if we need to build a foundation (ret != 0) but the
685 * current setting is turned off */
686 if (ret.Failed() || (ret.GetCost() != 0 && !_settings_game.construction.build_on_slopes)) {
687 return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
688 }
689 cost.AddCost(ret);
690 }
691
692 if (!need_to_clear) {
693 if (IsTileType(tile, MP_ROAD)) {
694 /* Don't put the pieces that already exist */
695 pieces &= ComplementRoadBits(existing);
696
697 /* Check if new road bits will have the same foundation as other existing road types */
698 if (IsNormalRoad(tile)) {
699 Slope slope = GetTileSlope(tile);
700 Foundation found_new = GetRoadFoundation(slope, pieces | existing);
701
702 /* Test if all other roadtypes can be built at that foundation */
703 for (RoadType rtest = ROADTYPE_ROAD; rtest < ROADTYPE_END; rtest++) {
704 if (rtest != rt) { // check only other road types
705 RoadBits bits = GetRoadBits(tile, rtest);
706 /* do not check if there are not road bits of given type */
707 if (bits != ROAD_NONE && GetRoadFoundation(slope, bits) != found_new) {
708 return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
709 }
710 }
711 }
712 }
713 }
714
715 CommandCost ret = EnsureNoVehicleOnGround(tile);
716 if (ret.Failed()) return ret;
717
718 }
719
720 uint num_pieces = (!need_to_clear && IsTileType(tile, MP_TUNNELBRIDGE)) ?
721 /* There are 2 pieces on *every* tile of the bridge or tunnel */
722 2 * (GetTunnelBridgeLength(GetOtherTunnelBridgeEnd(tile), tile) + 2) :
723 /* Count pieces */
724 CountBits(pieces);
725
726 cost.AddCost(num_pieces * _price[PR_BUILD_ROAD]);
727
728 if (flags & DC_EXEC) {
729 switch (GetTileType(tile)) {
730 case MP_ROAD: {
731 RoadTileType rtt = GetRoadTileType(tile);
732 if (existing == ROAD_NONE || rtt == ROAD_TILE_CROSSING) {
733 SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
734 SetRoadOwner(tile, rt, company);
735 if (rt == ROADTYPE_ROAD) SetTownIndex(tile, p2);
736 }
737 if (rtt != ROAD_TILE_CROSSING) SetRoadBits(tile, existing | pieces, rt);
738 break;
739 }
740
741 case MP_TUNNELBRIDGE: {
742 TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
743
744 SetRoadTypes(other_end, GetRoadTypes(other_end) | RoadTypeToRoadTypes(rt));
745 SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
746 SetRoadOwner(other_end, rt, company);
747 SetRoadOwner(tile, rt, company);
748
749 /* Mark tiles dirty that have been repaved */
750 MarkTileDirtyByTile(other_end);
751 MarkTileDirtyByTile(tile);
752 if (IsBridge(tile)) {
753 TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
754
755 for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
756 }
757 break;
758 }
759
760 case MP_STATION:
761 assert(IsDriveThroughStopTile(tile));
762 SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
763 SetRoadOwner(tile, rt, company);
764 break;
765
766 default:
767 MakeRoadNormal(tile, pieces, RoadTypeToRoadTypes(rt), p2, company, company);
768 break;
769 }
770
771 /* Update company infrastructure count. */
772 Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
773 if (c != NULL) {
774 if (IsTileType(tile, MP_TUNNELBRIDGE)) num_pieces *= TUNNELBRIDGE_TRACKBIT_FACTOR;
775 c->infrastructure.road[rt] += num_pieces;
776 DirtyCompanyInfrastructureWindows(c->index);
777 }
778
779 if (rt != ROADTYPE_TRAM && IsNormalRoadTile(tile)) {
780 existing |= pieces;
781 SetDisallowedRoadDirections(tile, IsStraightRoad(existing) ?
782 GetDisallowedRoadDirections(tile) ^ toggle_drd : DRD_NONE);
783 }
784
785 MarkTileDirtyByTile(tile);
786 }
787 return cost;
788 }
789
797 static bool CanConnectToRoad(TileIndex tile, RoadType rt, DiagDirection dir)
798 {
799 RoadBits bits = GetAnyRoadBits(tile + TileOffsByDiagDir(dir), rt, false);
800 return (bits & DiagDirToRoadBits(ReverseDiagDir(dir))) != 0;
801 }
802
820 CommandCost CmdBuildLongRoad(TileIndex start_tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
821 {
822 DisallowedRoadDirections drd = DRD_NORTHBOUND;
823
824 if (p1 >= MapSize()) return CMD_ERROR;
825
826 TileIndex end_tile = p1;
827 RoadType rt = Extract<RoadType, 3, 2>(p2);
828 if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
829
830 Axis axis = Extract<Axis, 2, 1>(p2);
831 /* Only drag in X or Y direction dictated by the direction variable */
832 if (axis == AXIS_X && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
833 if (axis == AXIS_Y && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
834
835 DiagDirection dir = AxisToDiagDir(axis);
836
837 /* Swap direction, also the half-tile drag var (bit 0 and 1) */
838 if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
839 dir = ReverseDiagDir(dir);
840 p2 ^= 3;
841 drd = DRD_SOUTHBOUND;
842 }
843
844 /* On the X-axis, we have to swap the initial bits, so they
845 * will be interpreted correctly in the GTTS. Furthermore
846 * when you just 'click' on one tile to build them. */
847 if ((axis == AXIS_Y) == (start_tile == end_tile && HasBit(p2, 0) == HasBit(p2, 1))) drd ^= DRD_BOTH;
848 /* No disallowed direction bits have to be toggled */
849 if (!HasBit(p2, 5)) drd = DRD_NONE;
850
851 CommandCost cost(EXPENSES_CONSTRUCTION);
852 CommandCost last_error = CMD_ERROR;
853 TileIndex tile = start_tile;
854 bool had_bridge = false;
855 bool had_tunnel = false;
856 bool had_success = false;
857 bool is_ai = HasBit(p2, 6);
858
859 /* Start tile is the first tile clicked by the user. */
860 for (;;) {
861 RoadBits bits = AxisToRoadBits(axis);
862
863 /* Determine which road parts should be built. */
864 if (!is_ai && start_tile != end_tile) {
865 /* Only build the first and last roadbit if they can connect to something. */
866 if (tile == end_tile && !CanConnectToRoad(tile, rt, dir)) {
867 bits = DiagDirToRoadBits(ReverseDiagDir(dir));
868 } else if (tile == start_tile && !CanConnectToRoad(tile, rt, ReverseDiagDir(dir))) {
869 bits = DiagDirToRoadBits(dir);
870 }
871 } else {
872 /* Road parts only have to be built at the start tile or at the end tile. */
873 if (tile == end_tile && !HasBit(p2, 1)) bits &= DiagDirToRoadBits(ReverseDiagDir(dir));
874 if (tile == start_tile && HasBit(p2, 0)) bits &= DiagDirToRoadBits(dir);
875 }
876
877 CommandCost ret = DoCommand(tile, drd << 6 | rt << 4 | bits, 0, flags, CMD_BUILD_ROAD);
878 if (ret.Failed()) {
879 last_error = ret;
880 if (last_error.GetErrorMessage() != STR_ERROR_ALREADY_BUILT) {
881 if (is_ai) return last_error;
882 break;
883 }
884 } else {
885 had_success = true;
886 /* Only pay for the upgrade on one side of the bridges and tunnels */
887 if (IsTileType(tile, MP_TUNNELBRIDGE)) {
888 if (IsBridge(tile)) {
889 if (!had_bridge || GetTunnelBridgeDirection(tile) == dir) {
890 cost.AddCost(ret);
891 }
892 had_bridge = true;
893 } else { // IsTunnel(tile)
894 if (!had_tunnel || GetTunnelBridgeDirection(tile) == dir) {
895 cost.AddCost(ret);
896 }
897 had_tunnel = true;
898 }
899 } else {
900 cost.AddCost(ret);
901 }
902 }
903
904 if (tile == end_tile) break;
905
906 tile += TileOffsByDiagDir(dir);
907 }
908
909 return had_success ? cost : last_error;
910 }
911
925 CommandCost CmdRemoveLongRoad(TileIndex start_tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
926 {
927 CommandCost cost(EXPENSES_CONSTRUCTION);
928
929 if (p1 >= MapSize()) return CMD_ERROR;
930
931 TileIndex end_tile = p1;
932 RoadType rt = Extract<RoadType, 3, 2>(p2);
933 if (!IsValidRoadType(rt)) return CMD_ERROR;
934
935 Axis axis = Extract<Axis, 2, 1>(p2);
936 /* Only drag in X or Y direction dictated by the direction variable */
937 if (axis == AXIS_X && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
938 if (axis == AXIS_Y && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
939
940 /* Swap start and ending tile, also the half-tile drag var (bit 0 and 1) */
941 if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
942 TileIndex t = start_tile;
943 start_tile = end_tile;
944 end_tile = t;
945 p2 ^= IsInsideMM(p2 & 3, 1, 3) ? 3 : 0;
946 }
947
948 Money money = GetAvailableMoneyForCommand();
949 TileIndex tile = start_tile;
950 CommandCost last_error = CMD_ERROR;
951 bool had_success = false;
952 /* Start tile is the small number. */
953 for (;;) {
954 RoadBits bits = AxisToRoadBits(axis);
955
956 if (tile == end_tile && !HasBit(p2, 1)) bits &= ROAD_NW | ROAD_NE;
957 if (tile == start_tile && HasBit(p2, 0)) bits &= ROAD_SE | ROAD_SW;
958
959 /* try to remove the halves. */
960 if (bits != 0) {
961 CommandCost ret = RemoveRoad(tile, flags & ~DC_EXEC, bits, rt, true);
962 if (ret.Succeeded()) {
963 if (flags & DC_EXEC) {
964 money -= ret.GetCost();
965 if (money < 0) {
966 _additional_cash_required = DoCommand(start_tile, end_tile, p2, flags & ~DC_EXEC, CMD_REMOVE_LONG_ROAD).GetCost();
967 return cost;
968 }
969 RemoveRoad(tile, flags, bits, rt, true, false);
970 }
971 cost.AddCost(ret);
972 had_success = true;
973 } else {
974 /* Ownership errors are more important. */
975 if (last_error.GetErrorMessage() != STR_ERROR_OWNED_BY) last_error = ret;
976 }
977 }
978
979 if (tile == end_tile) break;
980
981 tile += (axis == AXIS_Y) ? TileDiffXY(0, 1) : TileDiffXY(1, 0);
982 }
983
984 return had_success ? cost : last_error;
985 }
986
1000 CommandCost CmdBuildRoadDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
1001 {
1002 DiagDirection dir = Extract<DiagDirection, 0, 2>(p1);
1003 RoadType rt = Extract<RoadType, 2, 2>(p1);
1004
1005 if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
1006
1007 Slope tileh = GetTileSlope(tile);
1008 if (tileh != SLOPE_FLAT && (
1009 !_settings_game.construction.build_on_slopes ||
1010 !CanBuildDepotByTileh(dir, tileh)
1011 )) {
1012 return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
1013 }
1014
1015 CommandCost cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
1016 if (cost.Failed()) return cost;
1017
1018 if (IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
1019
1020 if (!Depot::CanAllocateItem()) return CMD_ERROR;
1021
1022 if (flags & DC_EXEC) {
1023 Depot *dep = new Depot(tile);
1024 dep->build_date = _date;
1025
1026 /* A road depot has two road bits. */
1027 Company::Get(_current_company)->infrastructure.road[rt] += 2;
1028 DirtyCompanyInfrastructureWindows(_current_company);
1029
1030 MakeRoadDepot(tile, _current_company, dep->index, dir, rt);
1031 MarkTileDirtyByTile(tile);
1032 MakeDefaultName(dep);
1033 }
1034 cost.AddCost(_price[PR_BUILD_DEPOT_ROAD]);
1035 return cost;
1036 }
1037
1038 static CommandCost RemoveRoadDepot(TileIndex tile, DoCommandFlag flags)
1039 {
1040 if (_current_company != OWNER_WATER) {
1041 CommandCost ret = CheckTileOwnership(tile);
1042 if (ret.Failed()) return ret;
1043 }
1044
1045 CommandCost ret = EnsureNoVehicleOnGround(tile);
1046 if (ret.Failed()) return ret;
1047
1048 if (flags & DC_EXEC) {
1049 Company *c = Company::GetIfValid(GetTileOwner(tile));
1050 if (c != NULL) {
1051 /* A road depot has two road bits. */
1052 c->infrastructure.road[FIND_FIRST_BIT(GetRoadTypes(tile))] -= 2;
1053 DirtyCompanyInfrastructureWindows(c->index);
1054 }
1055
1056 delete Depot::GetByTile(tile);
1057 DoClearSquare(tile);
1058 }
1059
1060 return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_DEPOT_ROAD]);
1061 }
1062
1063 static CommandCost ClearTile_Road(TileIndex tile, DoCommandFlag flags)
1064 {
1065 switch (GetRoadTileType(tile)) {
1066 case ROAD_TILE_NORMAL: {
1067 RoadBits b = GetAllRoadBits(tile);
1068
1069 /* Clear the road if only one piece is on the tile OR we are not using the DC_AUTO flag */
1070 if ((HasExactlyOneBit(b) && GetRoadBits(tile, ROADTYPE_TRAM) == ROAD_NONE) || !(flags & DC_AUTO)) {
1071 CommandCost ret(EXPENSES_CONSTRUCTION);
1072 RoadType rt;
1073 FOR_EACH_SET_ROADTYPE(rt, GetRoadTypes(tile)) {
1074 CommandCost tmp_ret = RemoveRoad(tile, flags, GetRoadBits(tile, rt), rt, true);
1075 if (tmp_ret.Failed()) return tmp_ret;
1076 ret.AddCost(tmp_ret);
1077 }
1078 return ret;
1079 }
1080 return_cmd_error(STR_ERROR_MUST_REMOVE_ROAD_FIRST);
1081 }
1082
1083 case ROAD_TILE_CROSSING: {
1084 RoadTypes rts = GetRoadTypes(tile);
1085 CommandCost ret(EXPENSES_CONSTRUCTION);
1086
1087 if (flags & DC_AUTO) return_cmd_error(STR_ERROR_MUST_REMOVE_ROAD_FIRST);
1088
1089 /* Must iterate over the roadtypes in a reverse manner because
1090 * tram tracks must be removed before the road bits. */
1091 RoadType rt = ROADTYPE_TRAM;
1092 do {
1093 if (HasBit(rts, rt)) {
1094 CommandCost tmp_ret = RemoveRoad(tile, flags, GetCrossingRoadBits(tile), rt, false);
1095 if (tmp_ret.Failed()) return tmp_ret;
1096 ret.AddCost(tmp_ret);
1097 }
1098 } while (rt-- != ROADTYPE_ROAD);
1099
1100 if (flags & DC_EXEC) {
1101 DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
1102 }
1103 return ret;
1104 }
1105
1106 default:
1107 case ROAD_TILE_DEPOT:
1108 if (flags & DC_AUTO) {
1109 return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
1110 }
1111 return RemoveRoadDepot(tile, flags);
1112 }
1113 }
1114
1115
1116 struct DrawRoadTileStruct {
1117 uint16 image;
1118 byte subcoord_x;
1119 byte subcoord_y;
1120 };
1121
1122 #include "table/road_land.h"
1123
1131 static Foundation GetRoadFoundation(Slope tileh, RoadBits bits)
1132 {
1133 /* Flat land and land without a road doesn't require a foundation */
1134 if (tileh == SLOPE_FLAT || bits == ROAD_NONE) return FOUNDATION_NONE;
1135
1136 /* Steep slopes behave the same as slopes with one corner raised. */
1137 if (IsSteepSlope(tileh)) {
1138 tileh = SlopeWithOneCornerRaised(GetHighestSlopeCorner(tileh));
1139 }
1140
1141 /* Leveled RoadBits on a slope */
1142 if ((_invalid_tileh_slopes_road[0][tileh] & bits) == ROAD_NONE) return FOUNDATION_LEVELED;
1143
1144 /* Straight roads without foundation on a slope */
1145 if (!IsSlopeWithOneCornerRaised(tileh) &&
1146 (_invalid_tileh_slopes_road[1][tileh] & bits) == ROAD_NONE)
1147 return FOUNDATION_NONE;
1148
1149 /* Roads on steep Slopes or on Slopes with one corner raised */
1150 return (bits == ROAD_X ? FOUNDATION_INCLINED_X : FOUNDATION_INCLINED_Y);
1151 }
1152
1153 const byte _road_sloped_sprites[14] = {
1154 0, 0, 2, 0,
1155 0, 1, 0, 0,
1156 3, 0, 0, 0,
1157 0, 0
1158 };
1159
1170 static bool AlwaysDrawUnpavedRoads(TileIndex tile, Roadside roadside)
1171 {
1172 return (IsOnSnow(tile) &&
1173 !(_settings_game.game_creation.landscape == LT_TROPIC && HasGrfMiscBit(GMB_DESERT_PAVED_ROADS) &&
1174 roadside != ROADSIDE_BARREN && roadside != ROADSIDE_GRASS && roadside != ROADSIDE_GRASS_ROAD_WORKS));
1175 }
1176
1182 void DrawTramCatenary(const TileInfo *ti, RoadBits tram)
1183 {
1184 /* Do not draw catenary if it is invisible */
1185 if (IsInvisibilitySet(TO_CATENARY)) return;
1186
1187 /* Don't draw the catenary under a low bridge */
1188 if (IsBridgeAbove(ti->tile) && !IsTransparencySet(TO_CATENARY)) {
1189 int height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
1190
1191 if (height <= GetTileMaxZ(ti->tile) + 1) return;
1192 }
1193
1194 SpriteID front;
1195 SpriteID back;
1196
1197 if (ti->tileh != SLOPE_FLAT) {
1198 back = SPR_TRAMWAY_BACK_WIRES_SLOPED + _road_sloped_sprites[ti->tileh - 1];
1199 front = SPR_TRAMWAY_FRONT_WIRES_SLOPED + _road_sloped_sprites[ti->tileh - 1];
1200 } else {
1201 back = SPR_TRAMWAY_BASE + _road_backpole_sprites_1[tram];
1202 front = SPR_TRAMWAY_BASE + _road_frontwire_sprites_1[tram];
1203 }
1204
1205 AddSortableSpriteToDraw(back, PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
1206 AddSortableSpriteToDraw(front, PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
1207 }
1208
1217 static void DrawRoadDetail(SpriteID img, const TileInfo *ti, int dx, int dy, int h)
1218 {
1219 int x = ti->x | dx;
1220 int y = ti->y | dy;
1221 int z = ti->z;
1222 if (ti->tileh != SLOPE_FLAT) z = GetSlopePixelZ(x, y);
1223 AddSortableSpriteToDraw(img, PAL_NONE, x, y, 2, 2, h, z);
1224 }
1225
1230 static void DrawRoadBits(TileInfo *ti)
1231 {
1232 RoadBits road = GetRoadBits(ti->tile, ROADTYPE_ROAD);
1233 RoadBits tram = GetRoadBits(ti->tile, ROADTYPE_TRAM);
1234
1235 SpriteID image = 0;
1236 PaletteID pal = PAL_NONE;
1237
1238 if (ti->tileh != SLOPE_FLAT) {
1239 DrawFoundation(ti, GetRoadFoundation(ti->tileh, road | tram));
1240
1241 /* DrawFoundation() modifies ti.
1242 * Default sloped sprites.. */
1243 if (ti->tileh != SLOPE_FLAT) image = _road_sloped_sprites[ti->tileh - 1] + SPR_ROAD_SLOPE_START;
1244 }
1245
1246 if (image == 0) image = _road_tile_sprites_1[road != ROAD_NONE ? road : tram];
1247
1248 Roadside roadside = GetRoadside(ti->tile);
1249
1250 if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
1251 image += 19;
1252 } else {
1253 switch (roadside) {
1254 case ROADSIDE_BARREN: pal = PALETTE_TO_BARE_LAND; break;
1255 case ROADSIDE_GRASS: break;
1256 case ROADSIDE_GRASS_ROAD_WORKS: break;
1257 default: image -= 19; break; // Paved
1258 }
1259 }
1260
1261 DrawGroundSprite(image, pal);
1262
1263 /* For tram we overlay the road graphics with either tram tracks only
1264 * (when there is actual road beneath the trams) or with tram tracks
1265 * and some dirts which hides the road graphics */
1266 if (tram != ROAD_NONE) {
1267 if (ti->tileh != SLOPE_FLAT) {
1268 image = _road_sloped_sprites[ti->tileh - 1] + SPR_TRAMWAY_SLOPED_OFFSET;
1269 } else {
1270 image = _road_tile_sprites_1[tram] - SPR_ROAD_Y;
1271 }
1272 image += (road == ROAD_NONE) ? SPR_TRAMWAY_TRAM : SPR_TRAMWAY_OVERLAY;
1273 DrawGroundSprite(image, pal);
1274 }
1275
1276 if (road != ROAD_NONE) {
1277 DisallowedRoadDirections drd = GetDisallowedRoadDirections(ti->tile);
1278 if (drd != DRD_NONE) {
1279 DrawGroundSpriteAt(SPR_ONEWAY_BASE + drd - 1 + ((road == ROAD_X) ? 0 : 3), PAL_NONE, 8, 8, GetPartialPixelZ(8, 8, ti->tileh));
1280 }
1281 }
1282
1283 if (HasRoadWorks(ti->tile)) {
1284 /* Road works */
1285 DrawGroundSprite((road | tram) & ROAD_X ? SPR_EXCAVATION_X : SPR_EXCAVATION_Y, PAL_NONE);
1286 return;
1287 }
1288
1289 if (tram != ROAD_NONE) DrawTramCatenary(ti, tram);
1290
1291 /* Return if full detail is disabled, or we are zoomed fully out. */
1292 if (!HasBit(_display_opt, DO_FULL_DETAIL) || _cur_dpi->zoom > ZOOM_LVL_DETAIL) return;
1293
1294 /* Do not draw details (street lights, trees) under low bridge */
1295 if (IsBridgeAbove(ti->tile) && (roadside == ROADSIDE_TREES || roadside == ROADSIDE_STREET_LIGHTS)) {
1296 int height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
1297 int minz = GetTileMaxZ(ti->tile) + 2;
1298
1299 if (roadside == ROADSIDE_TREES) minz++;
1300
1301 if (height < minz) return;
1302 }
1303
1304 /* If there are no road bits, return, as there is nothing left to do */
1305 if (HasAtMostOneBit(road)) return;
1306
1307 /* Draw extra details. */
1308 for (const DrawRoadTileStruct *drts = _road_display_table[roadside][road | tram]; drts->image != 0; drts++) {
1309 DrawRoadDetail(drts->image, ti, drts->subcoord_x, drts->subcoord_y, 0x10);
1310 }
1311 }
1312
1314 static void DrawTile_Road(TileInfo *ti)
1315 {
1316 switch (GetRoadTileType(ti->tile)) {
1317 case ROAD_TILE_NORMAL:
1318 DrawRoadBits(ti);
1319 break;
1320
1321 case ROAD_TILE_CROSSING: {
1322 if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
1323
1324 PaletteID pal = PAL_NONE;
1325 const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
1326
1327 if (rti->UsesOverlay()) {
1328 Axis axis = GetCrossingRailAxis(ti->tile);
1329 SpriteID road = SPR_ROAD_Y + axis;
1330
1331 Roadside roadside = GetRoadside(ti->tile);
1332
1333 if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
1334 road += 19;
1335 } else {
1336 switch (roadside) {
1337 case ROADSIDE_BARREN: pal = PALETTE_TO_BARE_LAND; break;
1338 case ROADSIDE_GRASS: break;
1339 default: road -= 19; break; // Paved
1340 }
1341 }
1342
1343 DrawGroundSprite(road, pal);
1344
1345 SpriteID rail = GetCustomRailSprite(rti, ti->tile, RTSG_CROSSING) + axis;
1346 /* Draw tracks, but draw PBS reserved tracks darker. */
1347 pal = (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasCrossingReservation(ti->tile)) ? PALETTE_CRASH : PAL_NONE;
1348 DrawGroundSprite(rail, pal);
1349
1350 DrawRailTileSeq(ti, &_crossing_layout, TO_CATENARY, rail, 0, PAL_NONE);
1351 } else {
1352 SpriteID image = rti->base_sprites.crossing;
1353
1354 if (GetCrossingRoadAxis(ti->tile) == AXIS_X) image++;
1355 if (IsCrossingBarred(ti->tile)) image += 2;
1356
1357 Roadside roadside = GetRoadside(ti->tile);
1358
1359 if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
1360 image += 8;
1361 } else {
1362 switch (roadside) {
1363 case ROADSIDE_BARREN: pal = PALETTE_TO_BARE_LAND; break;
1364 case ROADSIDE_GRASS: break;
1365 default: image += 4; break; // Paved
1366 }
1367 }
1368
1369 DrawGroundSprite(image, pal);
1370
1371 /* PBS debugging, draw reserved tracks darker */
1372 if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasCrossingReservation(ti->tile)) {
1373 DrawGroundSprite(GetCrossingRoadAxis(ti->tile) == AXIS_Y ? GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_x : GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_y, PALETTE_CRASH);
1374 }
1375 }
1376
1377 if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
1378 DrawGroundSprite(SPR_TRAMWAY_OVERLAY + (GetCrossingRoadAxis(ti->tile) ^ 1), pal);
1379 DrawTramCatenary(ti, GetCrossingRoadBits(ti->tile));
1380 }
1381 if (HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
1382 break;
1383 }
1384
1385 default:
1386 case ROAD_TILE_DEPOT: {
1387 if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
1388
1389 PaletteID palette = COMPANY_SPRITE_COLOUR(GetTileOwner(ti->tile));
1390
1391 const DrawTileSprites *dts;
1392 if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
1393 dts = &_tram_depot[GetRoadDepotDirection(ti->tile)];
1394 } else {
1395 dts = &_road_depot[GetRoadDepotDirection(ti->tile)];
1396 }
1397
1398 DrawGroundSprite(dts->ground.sprite, PAL_NONE);
1399 DrawOrigTileSeq(ti, dts, TO_BUILDINGS, palette);
1400 break;
1401 }
1402 }
1403 DrawBridgeMiddle(ti);
1404 }
1405
1413 void DrawRoadDepotSprite(int x, int y, DiagDirection dir, RoadType rt)
1414 {
1415 PaletteID palette = COMPANY_SPRITE_COLOUR(_local_company);
1416 const DrawTileSprites *dts = (rt == ROADTYPE_TRAM) ? &_tram_depot[dir] : &_road_depot[dir];
1417
1418 DrawSprite(dts->ground.sprite, PAL_NONE, x, y);
1419 DrawOrigTileSeqInGUI(x, y, dts, palette);
1420 }
1421
1427 void UpdateNearestTownForRoadTiles(bool invalidate)
1428 {
1429 assert(!invalidate || _generating_world);
1430
1431 for (TileIndex t = 0; t < MapSize(); t++) {
1432 if (IsTileType(t, MP_ROAD) && !IsRoadDepot(t) && !HasTownOwnedRoad(t)) {
1433 TownID tid = (TownID)INVALID_TOWN;
1434 if (!invalidate) {
1435 const Town *town = CalcClosestTownFromTile(t);
1436 if (town != NULL) tid = town->index;
1437 }
1438 SetTownIndex(t, tid);
1439 }
1440 }
1441 }
1442
1443 static int GetSlopePixelZ_Road(TileIndex tile, uint x, uint y)
1444 {
1445
1446 if (IsNormalRoad(tile)) {
1447 int z;
1448 Slope tileh = GetTilePixelSlope(tile, &z);
1449 if (tileh == SLOPE_FLAT) return z;
1450
1451 Foundation f = GetRoadFoundation(tileh, GetAllRoadBits(tile));
1452 z += ApplyPixelFoundationToSlope(f, &tileh);
1453 return z + GetPartialPixelZ(x & 0xF, y & 0xF, tileh);
1454 } else {
1455 return GetTileMaxPixelZ(tile);
1456 }
1457 }
1458
1459 static Foundation GetFoundation_Road(TileIndex tile, Slope tileh)
1460 {
1461 if (IsNormalRoad(tile)) {
1462 return GetRoadFoundation(tileh, GetAllRoadBits(tile));
1463 } else {
1464 return FlatteningFoundation(tileh);
1465 }
1466 }
1467
1468 static const Roadside _town_road_types[][2] = {
1469 { ROADSIDE_GRASS, ROADSIDE_GRASS },
1470 { ROADSIDE_PAVED, ROADSIDE_PAVED },
1471 { ROADSIDE_PAVED, ROADSIDE_PAVED },
1472 { ROADSIDE_TREES, ROADSIDE_TREES },
1473 { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
1474 };
1475
1476 static const Roadside _town_road_types_2[][2] = {
1477 { ROADSIDE_GRASS, ROADSIDE_GRASS },
1478 { ROADSIDE_PAVED, ROADSIDE_PAVED },
1479 { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
1480 { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
1481 { ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
1482 };
1483
1484
1485 static void TileLoop_Road(TileIndex tile)
1486 {
1487 switch (_settings_game.game_creation.landscape) {
1488 case LT_ARCTIC:
1489 if (IsOnSnow(tile) != (GetTileZ(tile) > GetSnowLine())) {
1490 ToggleSnow(tile);
1491 MarkTileDirtyByTile(tile);
1492 }
1493 break;
1494
1495 case LT_TROPIC:
1496 if (GetTropicZone(tile) == TROPICZONE_DESERT && !IsOnDesert(tile)) {
1497 ToggleDesert(tile);
1498 MarkTileDirtyByTile(tile);
1499 }
1500 break;
1501 }
1502
1503 if (IsRoadDepot(tile)) return;
1504
1505 const Town *t = ClosestTownFromTile(tile, UINT_MAX);
1506 if (!HasRoadWorks(tile)) {
1507 HouseZonesBits grp = HZB_TOWN_EDGE;
1508
1509 if (t != NULL) {
1510 grp = GetTownRadiusGroup(t, tile);
1511
1512 /* Show an animation to indicate road work */
1513 if (t->road_build_months != 0 &&
1514 (DistanceManhattan(t->xy, tile) < 8 || grp != HZB_TOWN_EDGE) &&
1515 IsNormalRoad(tile) && !HasAtMostOneBit(GetAllRoadBits(tile))) {
1516 if (GetFoundationSlope(tile) == SLOPE_FLAT && EnsureNoVehicleOnGround(tile).Succeeded() && Chance16(1, 40)) {
1517 StartRoadWorks(tile);
1518
1519 if (_settings_client.sound.ambient) SndPlayTileFx(SND_21_JACKHAMMER, tile);
1520 CreateEffectVehicleAbove(
1521 TileX(tile) * TILE_SIZE + 7,
1522 TileY(tile) * TILE_SIZE + 7,
1523 0,
1524 EV_BULLDOZER);
1525 MarkTileDirtyByTile(tile);
1526 return;
1527 }
1528 }
1529 }
1530
1531 {
1532 /* Adjust road ground type depending on 'grp' (grp is the distance to the center) */
1533 const Roadside *new_rs = (_settings_game.game_creation.landscape == LT_TOYLAND) ? _town_road_types_2[grp] : _town_road_types[grp];
1534 Roadside cur_rs = GetRoadside(tile);
1535
1536 /* We have our desired type, do nothing */
1537 if (cur_rs == new_rs[0]) return;
1538
1539 /* We have the pre-type of the desired type, switch to the desired type */
1540 if (cur_rs == new_rs[1]) {
1541 cur_rs = new_rs[0];
1542 /* We have barren land, install the pre-type */
1543 } else if (cur_rs == ROADSIDE_BARREN) {
1544 cur_rs = new_rs[1];
1545 /* We're totally off limits, remove any installation and make barren land */
1546 } else {
1547 cur_rs = ROADSIDE_BARREN;
1548 }
1549 SetRoadside(tile, cur_rs);
1550 MarkTileDirtyByTile(tile);
1551 }
1552 } else if (IncreaseRoadWorksCounter(tile)) {
1553 TerminateRoadWorks(tile);
1554
1555 if (_settings_game.economy.mod_road_rebuild) {
1556 /* Generate a nicer town surface */
1557 const RoadBits old_rb = GetAnyRoadBits(tile, ROADTYPE_ROAD);
1558 const RoadBits new_rb = CleanUpRoadBits(tile, old_rb);
1559
1560 if (old_rb != new_rb) {
1561 RemoveRoad(tile, DC_EXEC | DC_AUTO | DC_NO_WATER, (old_rb ^ new_rb), ROADTYPE_ROAD, true);
1562 }
1563 }
1564
1565 MarkTileDirtyByTile(tile);
1566 }
1567 }
1568
1569 static bool ClickTile_Road(TileIndex tile)
1570 {
1571 if (!IsRoadDepot(tile)) return false;
1572
1573 ShowDepotWindow(tile, VEH_ROAD);
1574 return true;
1575 }
1576
1577 /* Converts RoadBits to TrackBits */
1578 static const TrackBits _road_trackbits[16] = {
1579 TRACK_BIT_NONE, // ROAD_NONE
1580 TRACK_BIT_NONE, // ROAD_NW
1581 TRACK_BIT_NONE, // ROAD_SW
1582 TRACK_BIT_LEFT, // ROAD_W
1583 TRACK_BIT_NONE, // ROAD_SE
1584 TRACK_BIT_Y, // ROAD_Y
1585 TRACK_BIT_LOWER, // ROAD_S
1586 TRACK_BIT_LEFT | TRACK_BIT_LOWER | TRACK_BIT_Y, // ROAD_Y | ROAD_SW
1587 TRACK_BIT_NONE, // ROAD_NE
1588 TRACK_BIT_UPPER, // ROAD_N
1589 TRACK_BIT_X, // ROAD_X
1590 TRACK_BIT_LEFT | TRACK_BIT_UPPER | TRACK_BIT_X, // ROAD_X | ROAD_NW
1591 TRACK_BIT_RIGHT, // ROAD_E
1592 TRACK_BIT_RIGHT | TRACK_BIT_UPPER | TRACK_BIT_Y, // ROAD_Y | ROAD_NE
1593 TRACK_BIT_RIGHT | TRACK_BIT_LOWER | TRACK_BIT_X, // ROAD_X | ROAD_SE
1594 TRACK_BIT_ALL, // ROAD_ALL
1595 };
1596
1597 static TrackStatus GetTileTrackStatus_Road(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
1598 {
1599 TrackdirBits trackdirbits = TRACKDIR_BIT_NONE;
1600 TrackdirBits red_signals = TRACKDIR_BIT_NONE; // crossing barred
1601 switch (mode) {
1602 case TRANSPORT_RAIL:
1603 if (IsLevelCrossing(tile)) trackdirbits = TrackBitsToTrackdirBits(GetCrossingRailBits(tile));
1604 break;
1605
1606 case TRANSPORT_ROAD:
1607 if ((GetRoadTypes(tile) & sub_mode) == 0) break;
1608 switch (GetRoadTileType(tile)) {
1609 case ROAD_TILE_NORMAL: {
1610 const uint drd_to_multiplier[DRD_END] = { 0x101, 0x100, 0x1, 0x0 };
1611 RoadType rt = (RoadType)FindFirstBit(sub_mode);
1612 RoadBits bits = GetRoadBits(tile, rt);
1613
1614 /* no roadbit at this side of tile, return 0 */
1615 if (side != INVALID_DIAGDIR && (DiagDirToRoadBits(side) & bits) == 0) break;
1616
1617 uint multiplier = drd_to_multiplier[rt == ROADTYPE_TRAM ? DRD_NONE : GetDisallowedRoadDirections(tile)];
1618 if (!HasRoadWorks(tile)) trackdirbits = (TrackdirBits)(_road_trackbits[bits] * multiplier);
1619 break;
1620 }
1621
1622 case ROAD_TILE_CROSSING: {
1623 Axis axis = GetCrossingRoadAxis(tile);
1624
1625 if (side != INVALID_DIAGDIR && axis != DiagDirToAxis(side)) break;
1626
1627 trackdirbits = TrackBitsToTrackdirBits(AxisToTrackBits(axis));
1628 if (IsCrossingBarred(tile)) red_signals = trackdirbits;
1629 break;
1630 }
1631
1632 default:
1633 case ROAD_TILE_DEPOT: {
1634 DiagDirection dir = GetRoadDepotDirection(tile);
1635
1636 if (side != INVALID_DIAGDIR && side != dir) break;
1637
1638 trackdirbits = TrackBitsToTrackdirBits(DiagDirToDiagTrackBits(dir));
1639 break;
1640 }
1641 }
1642 break;
1643
1644 default: break;
1645 }
1646 return CombineTrackStatus(trackdirbits, red_signals);
1647 }
1648
1649 static const StringID _road_tile_strings[] = {
1650 STR_LAI_ROAD_DESCRIPTION_ROAD,
1651 STR_LAI_ROAD_DESCRIPTION_ROAD,
1652 STR_LAI_ROAD_DESCRIPTION_ROAD,
1653 STR_LAI_ROAD_DESCRIPTION_ROAD_WITH_STREETLIGHTS,
1654 STR_LAI_ROAD_DESCRIPTION_ROAD,
1655 STR_LAI_ROAD_DESCRIPTION_TREE_LINED_ROAD,
1656 STR_LAI_ROAD_DESCRIPTION_ROAD,
1657 STR_LAI_ROAD_DESCRIPTION_ROAD,
1658 };
1659
1660 static void GetTileDesc_Road(TileIndex tile, TileDesc *td)
1661 {
1662 Owner rail_owner = INVALID_OWNER;
1663 Owner road_owner = INVALID_OWNER;
1664 Owner tram_owner = INVALID_OWNER;
1665
1666 switch (GetRoadTileType(tile)) {
1667 case ROAD_TILE_CROSSING: {
1668 td->str = STR_LAI_ROAD_DESCRIPTION_ROAD_RAIL_LEVEL_CROSSING;
1669 RoadTypes rts = GetRoadTypes(tile);
1670 rail_owner = GetTileOwner(tile);
1671 if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
1672 if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
1673
1674 const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
1675 td->rail_speed = rti->max_speed;
1676
1677 break;
1678 }
1679
1680 case ROAD_TILE_DEPOT:
1681 td->str = STR_LAI_ROAD_DESCRIPTION_ROAD_VEHICLE_DEPOT;
1682 road_owner = GetTileOwner(tile); // Tile has only one owner, roadtype does not matter
1683 td->build_date = Depot::GetByTile(tile)->build_date;
1684 break;
1685
1686 default: {
1687 RoadTypes rts = GetRoadTypes(tile);
1688 td->str = (HasBit(rts, ROADTYPE_ROAD) ? _road_tile_strings[GetRoadside(tile)] : STR_LAI_ROAD_DESCRIPTION_TRAMWAY);
1689 if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
1690 if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
1691 break;
1692 }
1693 }
1694
1695 /* Now we have to discover, if the tile has only one owner or many:
1696 * - Find a first_owner of the tile. (Currently road or tram must be present, but this will break when the third type becomes available)
1697 * - Compare the found owner with the other owners, and test if they differ.
1698 * Note: If road exists it will be the first_owner.
1699 */
1700 Owner first_owner = (road_owner == INVALID_OWNER ? tram_owner : road_owner);
1701 bool mixed_owners = (tram_owner != INVALID_OWNER && tram_owner != first_owner) || (rail_owner != INVALID_OWNER && rail_owner != first_owner);
1702
1703 if (mixed_owners) {
1704 /* Multiple owners */
1705 td->owner_type[0] = (rail_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_RAIL_OWNER);
1706 td->owner[0] = rail_owner;
1707 td->owner_type[1] = (road_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_ROAD_OWNER);
1708 td->owner[1] = road_owner;
1709 td->owner_type[2] = (tram_owner == INVALID_OWNER ? STR_NULL : STR_LAND_AREA_INFORMATION_TRAM_OWNER);
1710 td->owner[2] = tram_owner;
1711 } else {
1712 /* One to rule them all */
1713 td->owner[0] = first_owner;
1714 }
1715 }
1716
1721 static const byte _roadveh_enter_depot_dir[4] = {
1722 TRACKDIR_X_SW, TRACKDIR_Y_NW, TRACKDIR_X_NE, TRACKDIR_Y_SE
1723 };
1724
1725 static VehicleEnterTileStatus VehicleEnter_Road(Vehicle *v, TileIndex tile, int x, int y)
1726 {
1727 switch (GetRoadTileType(tile)) {
1728 case ROAD_TILE_DEPOT: {
1729 if (v->type != VEH_ROAD) break;
1730
1731 RoadVehicle *rv = RoadVehicle::From(v);
1732 if (rv->frame == RVC_DEPOT_STOP_FRAME &&
1733 _roadveh_enter_depot_dir[GetRoadDepotDirection(tile)] == rv->state) {
1734 rv->state = RVSB_IN_DEPOT;
1735 rv->vehstatus |= VS_HIDDEN;
1736 rv->direction = ReverseDir(rv->direction);
1737 if (rv->Next() == NULL) VehicleEnterDepot(rv->First());
1738 rv->tile = tile;
1739
1740 InvalidateWindowData(WC_VEHICLE_DEPOT, rv->tile);
1741 return VETSB_ENTERED_WORMHOLE;
1742 }
1743 break;
1744 }
1745
1746 default: break;
1747 }
1748 return VETSB_CONTINUE;
1749 }
1750
1751
1752 static void ChangeTileOwner_Road(TileIndex tile, Owner old_owner, Owner new_owner)
1753 {
1754 if (IsRoadDepot(tile)) {
1755 if (GetTileOwner(tile) == old_owner) {
1756 if (new_owner == INVALID_OWNER) {
1757 DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
1758 } else {
1759 /* A road depot has two road bits. No need to dirty windows here, we'll redraw the whole screen anyway. */
1760 RoadType rt = (RoadType)FIND_FIRST_BIT(GetRoadTypes(tile));
1761 Company::Get(old_owner)->infrastructure.road[rt] -= 2;
1762 Company::Get(new_owner)->infrastructure.road[rt] += 2;
1763
1764 SetTileOwner(tile, new_owner);
1765 for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
1766 if (GetRoadOwner(tile, rt) == old_owner) {
1767 SetRoadOwner(tile, rt, new_owner);
1768 }
1769 }
1770 }
1771 }
1772 return;
1773 }
1774
1775 for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
1776 /* Update all roadtypes, no matter if they are present */
1777 if (GetRoadOwner(tile, rt) == old_owner) {
1778 if (HasTileRoadType(tile, rt)) {
1779 /* A level crossing has two road bits. No need to dirty windows here, we'll redraw the whole screen anyway. */
1780 uint num_bits = IsLevelCrossing(tile) ? 2 : CountBits(GetRoadBits(tile, rt));
1781 Company::Get(old_owner)->infrastructure.road[rt] -= num_bits;
1782 if (new_owner != INVALID_OWNER) Company::Get(new_owner)->infrastructure.road[rt] += num_bits;
1783 }
1784
1785 SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
1786 }
1787 }
1788
1789 if (IsLevelCrossing(tile)) {
1790 if (GetTileOwner(tile) == old_owner) {
1791 if (new_owner == INVALID_OWNER) {
1792 DoCommand(tile, 0, GetCrossingRailTrack(tile), DC_EXEC | DC_BANKRUPT, CMD_REMOVE_SINGLE_RAIL);
1793 } else {
1794 /* Update infrastructure counts. No need to dirty windows here, we'll redraw the whole screen anyway. */
1795 Company::Get(old_owner)->infrastructure.rail[GetRailType(tile)] -= LEVELCROSSING_TRACKBIT_FACTOR;
1796 Company::Get(new_owner)->infrastructure.rail[GetRailType(tile)] += LEVELCROSSING_TRACKBIT_FACTOR;
1797
1798 SetTileOwner(tile, new_owner);
1799 }
1800 }
1801 }
1802 }
1803
1804 static CommandCost TerraformTile_Road(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
1805 {
1806 if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
1807 switch (GetRoadTileType(tile)) {
1808 case ROAD_TILE_CROSSING:
1809 if (!IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new)) && HasBit(VALID_LEVEL_CROSSING_SLOPES, tileh_new)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
1810 break;
1811
1812 case ROAD_TILE_DEPOT:
1813 if (AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, GetRoadDepotDirection(tile))) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
1814 break;
1815
1816 case ROAD_TILE_NORMAL: {
1817 RoadBits bits = GetAllRoadBits(tile);
1818 RoadBits bits_copy = bits;
1819 /* Check if the slope-road_bits combination is valid at all, i.e. it is safe to call GetRoadFoundation(). */
1820 if (CheckRoadSlope(tileh_new, &bits_copy, ROAD_NONE, ROAD_NONE).Succeeded()) {
1821 /* CheckRoadSlope() sometimes changes the road_bits, if it does not agree with them. */
1822 if (bits == bits_copy) {
1823 int z_old;
1824 Slope tileh_old = GetTileSlope(tile, &z_old);
1825
1826 /* Get the slope on top of the foundation */
1827 z_old += ApplyFoundationToSlope(GetRoadFoundation(tileh_old, bits), &tileh_old);
1828 z_new += ApplyFoundationToSlope(GetRoadFoundation(tileh_new, bits), &tileh_new);
1829
1830 /* The surface slope must not be changed */
1831 if ((z_old == z_new) && (tileh_old == tileh_new)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
1832 }
1833 }
1834 break;
1835 }
1836
1837 default: NOT_REACHED();
1838 }
1839 }
1840
1841 return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
1842 }
1843
1845 extern const TileTypeProcs _tile_type_road_procs = {
1846 DrawTile_Road, // draw_tile_proc
1847 GetSlopePixelZ_Road, // get_slope_z_proc
1848 ClearTile_Road, // clear_tile_proc
1849 NULL, // add_accepted_cargo_proc
1850 GetTileDesc_Road, // get_tile_desc_proc
1851 GetTileTrackStatus_Road, // get_tile_track_status_proc
1852 ClickTile_Road, // click_tile_proc
1853 NULL, // animate_tile_proc
1854 TileLoop_Road, // tile_loop_proc
1855 ChangeTileOwner_Road, // change_tile_owner_proc
1856 NULL, // add_produced_cargo_proc
1857 VehicleEnter_Road, // vehicle_enter_tile_proc
1858 GetFoundation_Road, // get_foundation_proc
1859 TerraformTile_Road, // terraform_tile_proc
1860 };