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rail_cmd.cpp
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1 /* $Id: rail_cmd.cpp 27157 2015-02-22 14:01:24Z 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 "cmd_helper.h"
14 #include "viewport_func.h"
15 #include "command_func.h"
16 #include "depot_base.h"
17 #include "pathfinder/yapf/yapf_cache.h"
18 #include "newgrf_debug.h"
19 #include "newgrf_railtype.h"
20 #include "train.h"
21 #include "autoslope.h"
22 #include "water.h"
23 #include "tunnelbridge_map.h"
24 #include "vehicle_func.h"
25 #include "sound_func.h"
26 #include "tunnelbridge.h"
27 #include "elrail_func.h"
28 #include "town.h"
29 #include "pbs.h"
30 #include "company_base.h"
31 #include "core/backup_type.hpp"
32 #include "date_func.h"
33 #include "strings_func.h"
34 #include "company_gui.h"
35 #include "object_map.h"
36
37 #include "table/strings.h"
38 #include "table/railtypes.h"
39 #include "table/track_land.h"
40
41 #include "safeguards.h"
42
44 typedef SmallVector<Train *, 16> TrainList;
45
46 RailtypeInfo _railtypes[RAILTYPE_END];
47
48 assert_compile(sizeof(_original_railtypes) <= sizeof(_railtypes));
49
51 enum SignalOffsets {
52 SIGNAL_TO_SOUTHWEST,
53 SIGNAL_TO_NORTHEAST,
54 SIGNAL_TO_SOUTHEAST,
55 SIGNAL_TO_NORTHWEST,
56 SIGNAL_TO_EAST,
57 SIGNAL_TO_WEST,
58 SIGNAL_TO_SOUTH,
59 SIGNAL_TO_NORTH,
60 };
61
65 void ResetRailTypes()
66 {
67 memset(_railtypes, 0, sizeof(_railtypes));
68 memcpy(_railtypes, _original_railtypes, sizeof(_original_railtypes));
69 }
70
71 void ResolveRailTypeGUISprites(RailtypeInfo *rti)
72 {
73 SpriteID cursors_base = GetCustomRailSprite(rti, INVALID_TILE, RTSG_CURSORS);
74 if (cursors_base != 0) {
75 rti->gui_sprites.build_ns_rail = cursors_base + 0;
76 rti->gui_sprites.build_x_rail = cursors_base + 1;
77 rti->gui_sprites.build_ew_rail = cursors_base + 2;
78 rti->gui_sprites.build_y_rail = cursors_base + 3;
79 rti->gui_sprites.auto_rail = cursors_base + 4;
80 rti->gui_sprites.build_depot = cursors_base + 5;
81 rti->gui_sprites.build_tunnel = cursors_base + 6;
82 rti->gui_sprites.convert_rail = cursors_base + 7;
83 rti->cursor.rail_ns = cursors_base + 8;
84 rti->cursor.rail_swne = cursors_base + 9;
85 rti->cursor.rail_ew = cursors_base + 10;
86 rti->cursor.rail_nwse = cursors_base + 11;
87 rti->cursor.autorail = cursors_base + 12;
88 rti->cursor.depot = cursors_base + 13;
89 rti->cursor.tunnel = cursors_base + 14;
90 rti->cursor.convert = cursors_base + 15;
91 }
92
93 /* Array of default GUI signal sprite numbers. */
94 const SpriteID _signal_lookup[2][SIGTYPE_END] = {
95 {SPR_IMG_SIGNAL_ELECTRIC_NORM, SPR_IMG_SIGNAL_ELECTRIC_ENTRY, SPR_IMG_SIGNAL_ELECTRIC_EXIT,
96 SPR_IMG_SIGNAL_ELECTRIC_COMBO, SPR_IMG_SIGNAL_ELECTRIC_PBS, SPR_IMG_SIGNAL_ELECTRIC_PBS_OWAY},
97
98 {SPR_IMG_SIGNAL_SEMAPHORE_NORM, SPR_IMG_SIGNAL_SEMAPHORE_ENTRY, SPR_IMG_SIGNAL_SEMAPHORE_EXIT,
99 SPR_IMG_SIGNAL_SEMAPHORE_COMBO, SPR_IMG_SIGNAL_SEMAPHORE_PBS, SPR_IMG_SIGNAL_SEMAPHORE_PBS_OWAY},
100 };
101
102 for (SignalType type = SIGTYPE_NORMAL; type < SIGTYPE_END; type = (SignalType)(type + 1)) {
103 for (SignalVariant var = SIG_ELECTRIC; var <= SIG_SEMAPHORE; var = (SignalVariant)(var + 1)) {
104 SpriteID red = GetCustomSignalSprite(rti, INVALID_TILE, type, var, SIGNAL_STATE_RED, true);
105 SpriteID green = GetCustomSignalSprite(rti, INVALID_TILE, type, var, SIGNAL_STATE_GREEN, true);
106 rti->gui_sprites.signals[type][var][0] = (red != 0) ? red + SIGNAL_TO_SOUTH : _signal_lookup[var][type];
107 rti->gui_sprites.signals[type][var][1] = (green != 0) ? green + SIGNAL_TO_SOUTH : _signal_lookup[var][type] + 1;
108 }
109 }
110 }
111
115 void InitRailTypes()
116 {
117 for (RailType rt = RAILTYPE_BEGIN; rt != RAILTYPE_END; rt++) {
118 RailtypeInfo *rti = &_railtypes[rt];
119 ResolveRailTypeGUISprites(rti);
120 }
121 }
122
126 RailType AllocateRailType(RailTypeLabel label)
127 {
128 for (RailType rt = RAILTYPE_BEGIN; rt != RAILTYPE_END; rt++) {
129 RailtypeInfo *rti = &_railtypes[rt];
130
131 if (rti->label == 0) {
132 /* Set up new rail type */
133 memcpy(rti, &_railtypes[RAILTYPE_RAIL], sizeof(*rti));
134 rti->label = label;
135 /* Clear alternate label list. Can't use Reset() here as that would free
136 * the data pointer of RAILTYPE_RAIL and not our new rail type. */
137 new (&rti->alternate_labels) RailTypeLabelList;
138
139 /* Make us compatible with ourself. */
140 rti->powered_railtypes = (RailTypes)(1 << rt);
141 rti->compatible_railtypes = (RailTypes)(1 << rt);
142
143 /* We also introduce ourself. */
144 rti->introduces_railtypes = (RailTypes)(1 << rt);
145
146 /* Default sort order; order of allocation, but with some
147 * offsets so it's easier for NewGRF to pick a spot without
148 * changing the order of other (original) rail types.
149 * The << is so you can place other railtypes in between the
150 * other railtypes, the 7 is to be able to place something
151 * before the first (default) rail type. */
152 rti->sorting_order = rt << 4 | 7;
153 return rt;
154 }
155 }
156
157 return INVALID_RAILTYPE;
158 }
159
160 static const byte _track_sloped_sprites[14] = {
161 14, 15, 22, 13,
162 0, 21, 17, 12,
163 23, 0, 18, 20,
164 19, 16
165 };
166
167
168 /* 4
169 * ---------
170 * |\ /|
171 * | \ 1/ |
172 * | \ / |
173 * | \ / |
174 * 16| \ |32
175 * | / \2 |
176 * | / \ |
177 * | / \ |
178 * |/ \|
179 * ---------
180 * 8
181 */
182
183
184
185 /* MAP2 byte: abcd???? => Signal On? Same coding as map3lo
186 * MAP3LO byte: abcd???? => Signal Exists?
187 * a and b are for diagonals, upper and left,
188 * one for each direction. (ie a == NE->SW, b ==
189 * SW->NE, or v.v., I don't know. b and c are
190 * similar for lower and right.
191 * MAP2 byte: ????abcd => Type of ground.
192 * MAP3LO byte: ????abcd => Type of rail.
193 * MAP5: 00abcdef => rail
194 * 01abcdef => rail w/ signals
195 * 10uuuuuu => unused
196 * 11uuuudd => rail depot
197 */
198
207 static CommandCost EnsureNoTrainOnTrack(TileIndex tile, Track track)
208 {
209 TrackBits rail_bits = TrackToTrackBits(track);
210 return EnsureNoTrainOnTrackBits(tile, rail_bits);
211 }
212
220 static CommandCost CheckTrackCombination(TileIndex tile, TrackBits to_build, uint flags)
221 {
222 if (!IsPlainRail(tile)) return_cmd_error(STR_ERROR_IMPOSSIBLE_TRACK_COMBINATION);
223
224 /* So, we have a tile with tracks on it (and possibly signals). Let's see
225 * what tracks first */
226 TrackBits current = GetTrackBits(tile); // The current track layout.
227 TrackBits future = current | to_build; // The track layout we want to build.
228
229 /* Are we really building something new? */
230 if (current == future) {
231 /* Nothing new is being built */
232 return_cmd_error(STR_ERROR_ALREADY_BUILT);
233 }
234
235 /* Let's see if we may build this */
236 if ((flags & DC_NO_RAIL_OVERLAP) || HasSignals(tile)) {
237 /* If we are not allowed to overlap (flag is on for ai companies or we have
238 * signals on the tile), check that */
239 if (future != TRACK_BIT_HORZ && future != TRACK_BIT_VERT) {
240 return_cmd_error((flags & DC_NO_RAIL_OVERLAP) ? STR_ERROR_IMPOSSIBLE_TRACK_COMBINATION : STR_ERROR_MUST_REMOVE_SIGNALS_FIRST);
241 }
242 }
243 /* Normally, we may overlap and any combination is valid */
244 return CommandCost();
245 }
246
247
249 static const TrackBits _valid_tracks_without_foundation[15] = {
250 TRACK_BIT_ALL,
251 TRACK_BIT_RIGHT,
252 TRACK_BIT_UPPER,
253 TRACK_BIT_X,
254
255 TRACK_BIT_LEFT,
256 TRACK_BIT_NONE,
257 TRACK_BIT_Y,
258 TRACK_BIT_LOWER,
259
260 TRACK_BIT_LOWER,
261 TRACK_BIT_Y,
262 TRACK_BIT_NONE,
263 TRACK_BIT_LEFT,
264
265 TRACK_BIT_X,
266 TRACK_BIT_UPPER,
267 TRACK_BIT_RIGHT,
268 };
269
271 static const TrackBits _valid_tracks_on_leveled_foundation[15] = {
272 TRACK_BIT_NONE,
273 TRACK_BIT_LEFT,
274 TRACK_BIT_LOWER,
275 TRACK_BIT_Y | TRACK_BIT_LOWER | TRACK_BIT_LEFT,
276
277 TRACK_BIT_RIGHT,
278 TRACK_BIT_ALL,
279 TRACK_BIT_X | TRACK_BIT_LOWER | TRACK_BIT_RIGHT,
280 TRACK_BIT_ALL,
281
282 TRACK_BIT_UPPER,
283 TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_LEFT,
284 TRACK_BIT_ALL,
285 TRACK_BIT_ALL,
286
287 TRACK_BIT_Y | TRACK_BIT_UPPER | TRACK_BIT_RIGHT,
288 TRACK_BIT_ALL,
289 TRACK_BIT_ALL
290 };
291
299 Foundation GetRailFoundation(Slope tileh, TrackBits bits)
300 {
301 if (bits == TRACK_BIT_NONE) return FOUNDATION_NONE;
302
303 if (IsSteepSlope(tileh)) {
304 /* Test for inclined foundations */
305 if (bits == TRACK_BIT_X) return FOUNDATION_INCLINED_X;
306 if (bits == TRACK_BIT_Y) return FOUNDATION_INCLINED_Y;
307
308 /* Get higher track */
309 Corner highest_corner = GetHighestSlopeCorner(tileh);
310 TrackBits higher_track = CornerToTrackBits(highest_corner);
311
312 /* Only higher track? */
313 if (bits == higher_track) return HalftileFoundation(highest_corner);
314
315 /* Overlap with higher track? */
316 if (TracksOverlap(bits | higher_track)) return FOUNDATION_INVALID;
317
318 /* either lower track or both higher and lower track */
319 return ((bits & higher_track) != 0 ? FOUNDATION_STEEP_BOTH : FOUNDATION_STEEP_LOWER);
320 } else {
321 if ((~_valid_tracks_without_foundation[tileh] & bits) == 0) return FOUNDATION_NONE;
322
323 bool valid_on_leveled = ((~_valid_tracks_on_leveled_foundation[tileh] & bits) == 0);
324
325 Corner track_corner;
326 switch (bits) {
327 case TRACK_BIT_LEFT: track_corner = CORNER_W; break;
328 case TRACK_BIT_LOWER: track_corner = CORNER_S; break;
329 case TRACK_BIT_RIGHT: track_corner = CORNER_E; break;
330 case TRACK_BIT_UPPER: track_corner = CORNER_N; break;
331
332 case TRACK_BIT_HORZ:
333 if (tileh == SLOPE_N) return HalftileFoundation(CORNER_N);
334 if (tileh == SLOPE_S) return HalftileFoundation(CORNER_S);
335 return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID);
336
337 case TRACK_BIT_VERT:
338 if (tileh == SLOPE_W) return HalftileFoundation(CORNER_W);
339 if (tileh == SLOPE_E) return HalftileFoundation(CORNER_E);
340 return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID);
341
342 case TRACK_BIT_X:
343 if (IsSlopeWithOneCornerRaised(tileh)) return FOUNDATION_INCLINED_X;
344 return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID);
345
346 case TRACK_BIT_Y:
347 if (IsSlopeWithOneCornerRaised(tileh)) return FOUNDATION_INCLINED_Y;
348 return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID);
349
350 default:
351 return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID);
352 }
353 /* Single diagonal track */
354
355 /* Track must be at least valid on leveled foundation */
356 if (!valid_on_leveled) return FOUNDATION_INVALID;
357
358 /* If slope has three raised corners, build leveled foundation */
359 if (IsSlopeWithThreeCornersRaised(tileh)) return FOUNDATION_LEVELED;
360
361 /* If neighboured corners of track_corner are lowered, build halftile foundation */
362 if ((tileh & SlopeWithThreeCornersRaised(OppositeCorner(track_corner))) == SlopeWithOneCornerRaised(track_corner)) return HalftileFoundation(track_corner);
363
364 /* else special anti-zig-zag foundation */
365 return SpecialRailFoundation(track_corner);
366 }
367 }
368
369
379 static CommandCost CheckRailSlope(Slope tileh, TrackBits rail_bits, TrackBits existing, TileIndex tile)
380 {
381 /* don't allow building on the lower side of a coast */
382 if (GetFloodingBehaviour(tile) != FLOOD_NONE) {
383 if (!IsSteepSlope(tileh) && ((~_valid_tracks_on_leveled_foundation[tileh] & (rail_bits | existing)) != 0)) return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
384 }
385
386 Foundation f_new = GetRailFoundation(tileh, rail_bits | existing);
387
388 /* check track/slope combination */
389 if ((f_new == FOUNDATION_INVALID) ||
390 ((f_new != FOUNDATION_NONE) && (!_settings_game.construction.build_on_slopes))) {
391 return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
392 }
393
394 Foundation f_old = GetRailFoundation(tileh, existing);
395 return CommandCost(EXPENSES_CONSTRUCTION, f_new != f_old ? _price[PR_BUILD_FOUNDATION] : (Money)0);
396 }
397
398 /* Validate functions for rail building */
399 static inline bool ValParamTrackOrientation(Track track)
400 {
401 return IsValidTrack(track);
402 }
403
413 CommandCost CmdBuildSingleRail(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
414 {
415 RailType railtype = Extract<RailType, 0, 4>(p1);
416 Track track = Extract<Track, 0, 3>(p2);
417 CommandCost cost(EXPENSES_CONSTRUCTION);
418
419 if (!ValParamRailtype(railtype) || !ValParamTrackOrientation(track)) return CMD_ERROR;
420
421 Slope tileh = GetTileSlope(tile);
422 TrackBits trackbit = TrackToTrackBits(track);
423
424 switch (GetTileType(tile)) {
425 case MP_RAILWAY: {
426 CommandCost ret = CheckTileOwnership(tile);
427 if (ret.Failed()) return ret;
428
429 if (!IsPlainRail(tile)) return CMD_ERROR;
430
431 if (!IsCompatibleRail(GetRailType(tile), railtype)) return_cmd_error(STR_ERROR_IMPOSSIBLE_TRACK_COMBINATION);
432
433 ret = CheckTrackCombination(tile, trackbit, flags);
434 if (ret.Succeeded()) ret = EnsureNoTrainOnTrack(tile, track);
435 if (ret.Failed()) return ret;
436
437 ret = CheckRailSlope(tileh, trackbit, GetTrackBits(tile), tile);
438 if (ret.Failed()) return ret;
439 cost.AddCost(ret);
440
441 /* If the rail types don't match, try to convert only if engines of
442 * the new rail type are not powered on the present rail type and engines of
443 * the present rail type are powered on the new rail type. */
444 if (GetRailType(tile) != railtype && !HasPowerOnRail(railtype, GetRailType(tile))) {
445 if (HasPowerOnRail(GetRailType(tile), railtype)) {
446 ret = DoCommand(tile, tile, railtype, flags, CMD_CONVERT_RAIL);
447 if (ret.Failed()) return ret;
448 cost.AddCost(ret);
449 } else {
450 return CMD_ERROR;
451 }
452 }
453
454 if (flags & DC_EXEC) {
455 SetRailGroundType(tile, RAIL_GROUND_BARREN);
456 TrackBits bits = GetTrackBits(tile);
457 SetTrackBits(tile, bits | trackbit);
458 /* Subtract old infrastructure count. */
459 uint pieces = CountBits(bits);
460 if (TracksOverlap(bits)) pieces *= pieces;
461 Company::Get(GetTileOwner(tile))->infrastructure.rail[GetRailType(tile)] -= pieces;
462 /* Add new infrastructure count. */
463 pieces = CountBits(bits | trackbit);
464 if (TracksOverlap(bits | trackbit)) pieces *= pieces;
465 Company::Get(GetTileOwner(tile))->infrastructure.rail[GetRailType(tile)] += pieces;
466 DirtyCompanyInfrastructureWindows(GetTileOwner(tile));
467 }
468 break;
469 }
470
471 case MP_ROAD: {
472 /* Level crossings may only be built on these slopes */
473 if (!HasBit(VALID_LEVEL_CROSSING_SLOPES, tileh)) return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
474
475 CommandCost ret = EnsureNoVehicleOnGround(tile);
476 if (ret.Failed()) return ret;
477
478 if (IsNormalRoad(tile)) {
479 if (HasRoadWorks(tile)) return_cmd_error(STR_ERROR_ROAD_WORKS_IN_PROGRESS);
480
481 if (GetDisallowedRoadDirections(tile) != DRD_NONE) return_cmd_error(STR_ERROR_CROSSING_ON_ONEWAY_ROAD);
482
483 if (RailNoLevelCrossings(railtype)) return_cmd_error(STR_ERROR_CROSSING_DISALLOWED);
484
485 RoadTypes roadtypes = GetRoadTypes(tile);
486 RoadBits road = GetRoadBits(tile, ROADTYPE_ROAD);
487 RoadBits tram = GetRoadBits(tile, ROADTYPE_TRAM);
488 switch (roadtypes) {
489 default: break;
490 case ROADTYPES_TRAM:
491 /* Tram crossings must always have road. */
492 if (flags & DC_EXEC) {
493 SetRoadOwner(tile, ROADTYPE_ROAD, _current_company);
494 Company *c = Company::GetIfValid(_current_company);
495 if (c != NULL) {
496 /* A full diagonal tile has two road bits. */
497 c->infrastructure.road[ROADTYPE_ROAD] += 2;
498 DirtyCompanyInfrastructureWindows(c->index);
499 }
500 }
501 roadtypes |= ROADTYPES_ROAD;
502 break;
503
504 case ROADTYPES_ALL:
505 if (road != tram) return CMD_ERROR;
506 break;
507 }
508
509 road |= tram;
510
511 if ((track == TRACK_X && road == ROAD_Y) ||
512 (track == TRACK_Y && road == ROAD_X)) {
513 if (flags & DC_EXEC) {
514 MakeRoadCrossing(tile, GetRoadOwner(tile, ROADTYPE_ROAD), GetRoadOwner(tile, ROADTYPE_TRAM), _current_company, (track == TRACK_X ? AXIS_Y : AXIS_X), railtype, roadtypes, GetTownIndex(tile));
515 UpdateLevelCrossing(tile, false);
516 Company::Get(_current_company)->infrastructure.rail[railtype] += LEVELCROSSING_TRACKBIT_FACTOR;
517 DirtyCompanyInfrastructureWindows(_current_company);
518 }
519 break;
520 }
521 }
522
523 if (IsLevelCrossing(tile) && GetCrossingRailBits(tile) == trackbit) {
524 return_cmd_error(STR_ERROR_ALREADY_BUILT);
525 }
526 /* FALL THROUGH */
527 }
528
529 default: {
530 /* Will there be flat water on the lower halftile? */
531 bool water_ground = IsTileType(tile, MP_WATER) && IsSlopeWithOneCornerRaised(tileh);
532
533 CommandCost ret = CheckRailSlope(tileh, trackbit, TRACK_BIT_NONE, tile);
534 if (ret.Failed()) return ret;
535 cost.AddCost(ret);
536
537 ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
538 if (ret.Failed()) return ret;
539 cost.AddCost(ret);
540
541 if (water_ground) {
542 cost.AddCost(-_price[PR_CLEAR_WATER]);
543 cost.AddCost(_price[PR_CLEAR_ROUGH]);
544 }
545
546 if (flags & DC_EXEC) {
547 MakeRailNormal(tile, _current_company, trackbit, railtype);
548 if (water_ground) SetRailGroundType(tile, RAIL_GROUND_WATER);
549 Company::Get(_current_company)->infrastructure.rail[railtype]++;
550 DirtyCompanyInfrastructureWindows(_current_company);
551 }
552 break;
553 }
554 }
555
556 if (flags & DC_EXEC) {
557 MarkTileDirtyByTile(tile);
558 AddTrackToSignalBuffer(tile, track, _current_company);
559 YapfNotifyTrackLayoutChange(tile, track);
560 }
561
562 cost.AddCost(RailBuildCost(railtype));
563 return cost;
564 }
565
575 CommandCost CmdRemoveSingleRail(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
576 {
577 Track track = Extract<Track, 0, 3>(p2);
578 CommandCost cost(EXPENSES_CONSTRUCTION);
579 bool crossing = false;
580
581 if (!ValParamTrackOrientation(track)) return CMD_ERROR;
582 TrackBits trackbit = TrackToTrackBits(track);
583
584 /* Need to read tile owner now because it may change when the rail is removed
585 * Also, in case of floods, _current_company != owner
586 * There may be invalid tiletype even in exec run (when removing long track),
587 * so do not call GetTileOwner(tile) in any case here */
588 Owner owner = INVALID_OWNER;
589
590 Train *v = NULL;
591
592 switch (GetTileType(tile)) {
593 case MP_ROAD: {
594 if (!IsLevelCrossing(tile) || GetCrossingRailBits(tile) != trackbit) return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
595
596 if (_current_company != OWNER_WATER) {
597 CommandCost ret = CheckTileOwnership(tile);
598 if (ret.Failed()) return ret;
599 }
600
601 if (!(flags & DC_BANKRUPT)) {
602 CommandCost ret = EnsureNoVehicleOnGround(tile);
603 if (ret.Failed()) return ret;
604 }
605
606 cost.AddCost(RailClearCost(GetRailType(tile)));
607
608 if (flags & DC_EXEC) {
609 if (HasReservedTracks(tile, trackbit)) {
610 v = GetTrainForReservation(tile, track);
611 if (v != NULL) FreeTrainTrackReservation(v);
612 }
613 owner = GetTileOwner(tile);
614 Company::Get(owner)->infrastructure.rail[GetRailType(tile)] -= LEVELCROSSING_TRACKBIT_FACTOR;
615 DirtyCompanyInfrastructureWindows(owner);
616 MakeRoadNormal(tile, GetCrossingRoadBits(tile), GetRoadTypes(tile), GetTownIndex(tile), GetRoadOwner(tile, ROADTYPE_ROAD), GetRoadOwner(tile, ROADTYPE_TRAM));
617 DeleteNewGRFInspectWindow(GSF_RAILTYPES, tile);
618 }
619 break;
620 }
621
622 case MP_RAILWAY: {
623 TrackBits present;
624 /* There are no rails present at depots. */
625 if (!IsPlainRail(tile)) return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
626
627 if (_current_company != OWNER_WATER) {
628 CommandCost ret = CheckTileOwnership(tile);
629 if (ret.Failed()) return ret;
630 }
631
632 CommandCost ret = EnsureNoTrainOnTrack(tile, track);
633 if (ret.Failed()) return ret;
634
635 present = GetTrackBits(tile);
636 if ((present & trackbit) == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
637 if (present == (TRACK_BIT_X | TRACK_BIT_Y)) crossing = true;
638
639 cost.AddCost(RailClearCost(GetRailType(tile)));
640
641 /* Charge extra to remove signals on the track, if they are there */
642 if (HasSignalOnTrack(tile, track)) {
643 cost.AddCost(DoCommand(tile, track, 0, flags, CMD_REMOVE_SIGNALS));
644 }
645
646 if (flags & DC_EXEC) {
647 if (HasReservedTracks(tile, trackbit)) {
648 v = GetTrainForReservation(tile, track);
649 if (v != NULL) FreeTrainTrackReservation(v);
650 }
651
652 owner = GetTileOwner(tile);
653
654 /* Subtract old infrastructure count. */
655 uint pieces = CountBits(present);
656 if (TracksOverlap(present)) pieces *= pieces;
657 Company::Get(owner)->infrastructure.rail[GetRailType(tile)] -= pieces;
658 /* Add new infrastructure count. */
659 present ^= trackbit;
660 pieces = CountBits(present);
661 if (TracksOverlap(present)) pieces *= pieces;
662 Company::Get(owner)->infrastructure.rail[GetRailType(tile)] += pieces;
663 DirtyCompanyInfrastructureWindows(owner);
664
665 if (present == 0) {
666 Slope tileh = GetTileSlope(tile);
667 /* If there is flat water on the lower halftile, convert the tile to shore so the water remains */
668 if (GetRailGroundType(tile) == RAIL_GROUND_WATER && IsSlopeWithOneCornerRaised(tileh)) {
669 MakeShore(tile);
670 } else {
671 DoClearSquare(tile);
672 }
673 DeleteNewGRFInspectWindow(GSF_RAILTYPES, tile);
674 } else {
675 SetTrackBits(tile, present);
676 SetTrackReservation(tile, GetRailReservationTrackBits(tile) & present);
677 }
678 }
679 break;
680 }
681
682 default: return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
683 }
684
685 if (flags & DC_EXEC) {
686 /* if we got that far, 'owner' variable is set correctly */
687 assert(Company::IsValidID(owner));
688
689 MarkTileDirtyByTile(tile);
690 if (crossing) {
691 /* crossing is set when only TRACK_BIT_X and TRACK_BIT_Y are set. As we
692 * are removing one of these pieces, we'll need to update signals for
693 * both directions explicitly, as after the track is removed it won't
694 * 'connect' with the other piece. */
695 AddTrackToSignalBuffer(tile, TRACK_X, owner);
696 AddTrackToSignalBuffer(tile, TRACK_Y, owner);
697 YapfNotifyTrackLayoutChange(tile, TRACK_X);
698 YapfNotifyTrackLayoutChange(tile, TRACK_Y);
699 } else {
700 AddTrackToSignalBuffer(tile, track, owner);
701 YapfNotifyTrackLayoutChange(tile, track);
702 }
703
704 if (v != NULL) TryPathReserve(v, true);
705 }
706
707 return cost;
708 }
709
710
718 bool FloodHalftile(TileIndex t)
719 {
720 assert(IsPlainRailTile(t));
721
722 bool flooded = false;
723 if (GetRailGroundType(t) == RAIL_GROUND_WATER) return flooded;
724
725 Slope tileh = GetTileSlope(t);
726 TrackBits rail_bits = GetTrackBits(t);
727
728 if (IsSlopeWithOneCornerRaised(tileh)) {
729 TrackBits lower_track = CornerToTrackBits(OppositeCorner(GetHighestSlopeCorner(tileh)));
730
731 TrackBits to_remove = lower_track & rail_bits;
732 if (to_remove != 0) {
733 Backup<CompanyByte> cur_company(_current_company, OWNER_WATER, FILE_LINE);
734 flooded = DoCommand(t, 0, FIND_FIRST_BIT(to_remove), DC_EXEC, CMD_REMOVE_SINGLE_RAIL).Succeeded();
735 cur_company.Restore();
736 if (!flooded) return flooded; // not yet floodable
737 rail_bits = rail_bits & ~to_remove;
738 if (rail_bits == 0) {
739 MakeShore(t);
740 MarkTileDirtyByTile(t);
741 return flooded;
742 }
743 }
744
745 if (IsNonContinuousFoundation(GetRailFoundation(tileh, rail_bits))) {
746 flooded = true;
747 SetRailGroundType(t, RAIL_GROUND_WATER);
748 MarkTileDirtyByTile(t);
749 }
750 } else {
751 /* Make shore on steep slopes and 'three-corners-raised'-slopes. */
752 if (ApplyFoundationToSlope(GetRailFoundation(tileh, rail_bits), &tileh) == 0) {
753 if (IsSteepSlope(tileh) || IsSlopeWithThreeCornersRaised(tileh)) {
754 flooded = true;
755 SetRailGroundType(t, RAIL_GROUND_WATER);
756 MarkTileDirtyByTile(t);
757 }
758 }
759 }
760 return flooded;
761 }
762
763 static const TileIndexDiffC _trackdelta[] = {
764 { -1, 0 }, { 0, 1 }, { -1, 0 }, { 0, 1 }, { 1, 0 }, { 0, 1 },
765 { 0, 0 },
766 { 0, 0 },
767 { 1, 0 }, { 0, -1 }, { 0, -1 }, { 1, 0 }, { 0, -1 }, { -1, 0 },
768 { 0, 0 },
769 { 0, 0 }
770 };
771
772
773 static CommandCost ValidateAutoDrag(Trackdir *trackdir, TileIndex start, TileIndex end)
774 {
775 int x = TileX(start);
776 int y = TileY(start);
777 int ex = TileX(end);
778 int ey = TileY(end);
779
780 if (!ValParamTrackOrientation(TrackdirToTrack(*trackdir))) return CMD_ERROR;
781
782 /* calculate delta x,y from start to end tile */
783 int dx = ex - x;
784 int dy = ey - y;
785
786 /* calculate delta x,y for the first direction */
787 int trdx = _trackdelta[*trackdir].x;
788 int trdy = _trackdelta[*trackdir].y;
789
790 if (!IsDiagonalTrackdir(*trackdir)) {
791 trdx += _trackdelta[*trackdir ^ 1].x;
792 trdy += _trackdelta[*trackdir ^ 1].y;
793 }
794
795 /* validate the direction */
796 while ((trdx <= 0 && dx > 0) ||
797 (trdx >= 0 && dx < 0) ||
798 (trdy <= 0 && dy > 0) ||
799 (trdy >= 0 && dy < 0)) {
800 if (!HasBit(*trackdir, 3)) { // first direction is invalid, try the other
801 SetBit(*trackdir, 3); // reverse the direction
802 trdx = -trdx;
803 trdy = -trdy;
804 } else { // other direction is invalid too, invalid drag
805 return CMD_ERROR;
806 }
807 }
808
809 /* (for diagonal tracks, this is already made sure of by above test), but:
810 * for non-diagonal tracks, check if the start and end tile are on 1 line */
811 if (!IsDiagonalTrackdir(*trackdir)) {
812 trdx = _trackdelta[*trackdir].x;
813 trdy = _trackdelta[*trackdir].y;
814 if (abs(dx) != abs(dy) && abs(dx) + abs(trdy) != abs(dy) + abs(trdx)) return CMD_ERROR;
815 }
816
817 return CommandCost();
818 }
819
833 static CommandCost CmdRailTrackHelper(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
834 {
835 CommandCost total_cost(EXPENSES_CONSTRUCTION);
836 Track track = Extract<Track, 4, 3>(p2);
837 bool remove = HasBit(p2, 7);
838 RailType railtype = Extract<RailType, 0, 4>(p2);
839
840 if ((!remove && !ValParamRailtype(railtype)) || !ValParamTrackOrientation(track)) return CMD_ERROR;
841 if (p1 >= MapSize()) return CMD_ERROR;
842 TileIndex end_tile = p1;
843 Trackdir trackdir = TrackToTrackdir(track);
844
845 CommandCost ret = ValidateAutoDrag(&trackdir, tile, end_tile);
846 if (ret.Failed()) return ret;
847
848 bool had_success = false;
849 CommandCost last_error = CMD_ERROR;
850 for (;;) {
851 CommandCost ret = DoCommand(tile, remove ? 0 : railtype, TrackdirToTrack(trackdir), flags, remove ? CMD_REMOVE_SINGLE_RAIL : CMD_BUILD_SINGLE_RAIL);
852
853 if (ret.Failed()) {
854 last_error = ret;
855 if (last_error.GetErrorMessage() != STR_ERROR_ALREADY_BUILT && !remove) {
856 if (HasBit(p2, 8)) return last_error;
857 break;
858 }
859
860 /* Ownership errors are more important. */
861 if (last_error.GetErrorMessage() == STR_ERROR_OWNED_BY && remove) break;
862 } else {
863 had_success = true;
864 total_cost.AddCost(ret);
865 }
866
867 if (tile == end_tile) break;
868
869 tile += ToTileIndexDiff(_trackdelta[trackdir]);
870
871 /* toggle railbit for the non-diagonal tracks */
872 if (!IsDiagonalTrackdir(trackdir)) ToggleBit(trackdir, 0);
873 }
874
875 if (had_success) return total_cost;
876 return last_error;
877 }
878
893 CommandCost CmdBuildRailroadTrack(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
894 {
895 return CmdRailTrackHelper(tile, flags, p1, ClrBit(p2, 7), text);
896 }
897
912 CommandCost CmdRemoveRailroadTrack(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
913 {
914 return CmdRailTrackHelper(tile, flags, p1, SetBit(p2, 7), text);
915 }
916
929 CommandCost CmdBuildTrainDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
930 {
931 /* check railtype and valid direction for depot (0 through 3), 4 in total */
932 RailType railtype = Extract<RailType, 0, 4>(p1);
933 if (!ValParamRailtype(railtype)) return CMD_ERROR;
934
935 Slope tileh = GetTileSlope(tile);
936
937 DiagDirection dir = Extract<DiagDirection, 0, 2>(p2);
938
939 /* Prohibit construction if
940 * The tile is non-flat AND
941 * 1) build-on-slopes is disabled
942 * 2) the tile is steep i.e. spans two height levels
943 * 3) the exit points in the wrong direction
944 */
945
946 if (tileh != SLOPE_FLAT && (
947 !_settings_game.construction.build_on_slopes ||
948 !CanBuildDepotByTileh(dir, tileh)
949 )) {
950 return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
951 }
952
953 CommandCost cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
954 if (cost.Failed()) return cost;
955
956 if (IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
957
958 if (!Depot::CanAllocateItem()) return CMD_ERROR;
959
960 if (flags & DC_EXEC) {
961 Depot *d = new Depot(tile);
962 d->build_date = _date;
963
964 MakeRailDepot(tile, _current_company, d->index, dir, railtype);
965 MarkTileDirtyByTile(tile);
966 MakeDefaultName(d);
967
968 Company::Get(_current_company)->infrastructure.rail[railtype]++;
969 DirtyCompanyInfrastructureWindows(_current_company);
970
971 AddSideToSignalBuffer(tile, INVALID_DIAGDIR, _current_company);
972 YapfNotifyTrackLayoutChange(tile, DiagDirToDiagTrack(dir));
973 }
974
975 cost.AddCost(_price[PR_BUILD_DEPOT_TRAIN]);
976 cost.AddCost(RailBuildCost(railtype));
977 return cost;
978 }
979
1001 CommandCost CmdBuildSingleSignal(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
1002 {
1003 Track track = Extract<Track, 0, 3>(p1);
1004 bool ctrl_pressed = HasBit(p1, 3); // was the CTRL button pressed
1005 SignalVariant sigvar = (ctrl_pressed ^ HasBit(p1, 4)) ? SIG_SEMAPHORE : SIG_ELECTRIC; // the signal variant of the new signal
1006 SignalType sigtype = Extract<SignalType, 5, 3>(p1); // the signal type of the new signal
1007 bool convert_signal = HasBit(p1, 8); // convert button pressed
1008 SignalType cycle_start = Extract<SignalType, 9, 3>(p1);
1009 SignalType cycle_stop = Extract<SignalType, 12, 3>(p1);
1010 uint num_dir_cycle = GB(p1, 15, 2);
1011
1012 if (sigtype > SIGTYPE_LAST) return CMD_ERROR;
1013 if (cycle_start > cycle_stop || cycle_stop > SIGTYPE_LAST) return CMD_ERROR;
1014
1015 /* You can only build signals on plain rail tiles, and the selected track must exist */
1016 if (!ValParamTrackOrientation(track) || !IsPlainRailTile(tile) ||
1017 !HasTrack(tile, track)) {
1018 return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
1019 }
1020 /* Protect against invalid signal copying */
1021 if (p2 != 0 && (p2 & SignalOnTrack(track)) == 0) return CMD_ERROR;
1022
1023 CommandCost ret = CheckTileOwnership(tile);
1024 if (ret.Failed()) return ret;
1025
1026 /* See if this is a valid track combination for signals (no overlap) */
1027 if (TracksOverlap(GetTrackBits(tile))) return_cmd_error(STR_ERROR_NO_SUITABLE_RAILROAD_TRACK);
1028
1029 /* In case we don't want to change an existing signal, return without error. */
1030 if (HasBit(p1, 17) && HasSignalOnTrack(tile, track)) return CommandCost();
1031
1032 /* you can not convert a signal if no signal is on track */
1033 if (convert_signal && !HasSignalOnTrack(tile, track)) return_cmd_error(STR_ERROR_THERE_ARE_NO_SIGNALS);
1034
1035 CommandCost cost;
1036 if (!HasSignalOnTrack(tile, track)) {
1037 /* build new signals */
1038 cost = CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_SIGNALS]);
1039 } else {
1040 if (p2 != 0 && sigvar != GetSignalVariant(tile, track)) {
1041 /* convert signals <-> semaphores */
1042 cost = CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_SIGNALS] + _price[PR_CLEAR_SIGNALS]);
1043
1044 } else if (convert_signal) {
1045 /* convert button pressed */
1046 if (ctrl_pressed || GetSignalVariant(tile, track) != sigvar) {
1047 /* convert electric <-> semaphore */
1048 cost = CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_SIGNALS] + _price[PR_CLEAR_SIGNALS]);
1049 } else {
1050 /* it is free to change signal type: normal-pre-exit-combo */
1051 cost = CommandCost();
1052 }
1053
1054 } else {
1055 /* it is free to change orientation/pre-exit-combo signals */
1056 cost = CommandCost();
1057 }
1058 }
1059
1060 if (flags & DC_EXEC) {
1061 Train *v = NULL;
1062 /* The new/changed signal could block our path. As this can lead to
1063 * stale reservations, we clear the path reservation here and try
1064 * to redo it later on. */
1065 if (HasReservedTracks(tile, TrackToTrackBits(track))) {
1066 v = GetTrainForReservation(tile, track);
1067 if (v != NULL) FreeTrainTrackReservation(v);
1068 }
1069
1070 if (!HasSignals(tile)) {
1071 /* there are no signals at all on this tile yet */
1072 SetHasSignals(tile, true);
1073 SetSignalStates(tile, 0xF); // all signals are on
1074 SetPresentSignals(tile, 0); // no signals built by default
1075 SetSignalType(tile, track, sigtype);
1076 SetSignalVariant(tile, track, sigvar);
1077 }
1078
1079 /* Subtract old signal infrastructure count. */
1080 Company::Get(GetTileOwner(tile))->infrastructure.signal -= CountBits(GetPresentSignals(tile));
1081
1082 if (p2 == 0) {
1083 if (!HasSignalOnTrack(tile, track)) {
1084 /* build new signals */
1085 SetPresentSignals(tile, GetPresentSignals(tile) | (IsPbsSignal(sigtype) ? KillFirstBit(SignalOnTrack(track)) : SignalOnTrack(track)));
1086 SetSignalType(tile, track, sigtype);
1087 SetSignalVariant(tile, track, sigvar);
1088 while (num_dir_cycle-- > 0) CycleSignalSide(tile, track);
1089 } else {
1090 if (convert_signal) {
1091 /* convert signal button pressed */
1092 if (ctrl_pressed) {
1093 /* toggle the present signal variant: SIG_ELECTRIC <-> SIG_SEMAPHORE */
1094 SetSignalVariant(tile, track, (GetSignalVariant(tile, track) == SIG_ELECTRIC) ? SIG_SEMAPHORE : SIG_ELECTRIC);
1095 /* Query current signal type so the check for PBS signals below works. */
1096 sigtype = GetSignalType(tile, track);
1097 } else {
1098 /* convert the present signal to the chosen type and variant */
1099 SetSignalType(tile, track, sigtype);
1100 SetSignalVariant(tile, track, sigvar);
1101 if (IsPbsSignal(sigtype) && (GetPresentSignals(tile) & SignalOnTrack(track)) == SignalOnTrack(track)) {
1102 SetPresentSignals(tile, (GetPresentSignals(tile) & ~SignalOnTrack(track)) | KillFirstBit(SignalOnTrack(track)));
1103 }
1104 }
1105
1106 } else if (ctrl_pressed) {
1107 /* cycle between cycle_start and cycle_end */
1108 sigtype = (SignalType)(GetSignalType(tile, track) + 1);
1109
1110 if (sigtype < cycle_start || sigtype > cycle_stop) sigtype = cycle_start;
1111
1112 SetSignalType(tile, track, sigtype);
1113 if (IsPbsSignal(sigtype) && (GetPresentSignals(tile) & SignalOnTrack(track)) == SignalOnTrack(track)) {
1114 SetPresentSignals(tile, (GetPresentSignals(tile) & ~SignalOnTrack(track)) | KillFirstBit(SignalOnTrack(track)));
1115 }
1116 } else {
1117 /* cycle the signal side: both -> left -> right -> both -> ... */
1118 CycleSignalSide(tile, track);
1119 /* Query current signal type so the check for PBS signals below works. */
1120 sigtype = GetSignalType(tile, track);
1121 }
1122 }
1123 } else {
1124 /* If CmdBuildManySignals is called with copying signals, just copy the
1125 * direction of the first signal given as parameter by CmdBuildManySignals */
1126 SetPresentSignals(tile, (GetPresentSignals(tile) & ~SignalOnTrack(track)) | (p2 & SignalOnTrack(track)));
1127 SetSignalVariant(tile, track, sigvar);
1128 SetSignalType(tile, track, sigtype);
1129 }
1130
1131 /* Add new signal infrastructure count. */
1132 Company::Get(GetTileOwner(tile))->infrastructure.signal += CountBits(GetPresentSignals(tile));
1133 DirtyCompanyInfrastructureWindows(GetTileOwner(tile));
1134
1135 if (IsPbsSignal(sigtype)) {
1136 /* PBS signals should show red unless they are on reserved tiles without a train. */
1137 uint mask = GetPresentSignals(tile) & SignalOnTrack(track);
1138 SetSignalStates(tile, (GetSignalStates(tile) & ~mask) | ((HasBit(GetRailReservationTrackBits(tile), track) && EnsureNoVehicleOnGround(tile).Succeeded() ? UINT_MAX : 0) & mask));
1139 }
1140 MarkTileDirtyByTile(tile);
1141 AddTrackToSignalBuffer(tile, track, _current_company);
1142 YapfNotifyTrackLayoutChange(tile, track);
1143 if (v != NULL) {
1144 /* Extend the train's path if it's not stopped or loading, or not at a safe position. */
1145 if (!(((v->vehstatus & VS_STOPPED) && v->cur_speed == 0) || v->current_order.IsType(OT_LOADING)) ||
1146 !IsSafeWaitingPosition(v, v->tile, v->GetVehicleTrackdir(), true, _settings_game.pf.forbid_90_deg)) {
1147 TryPathReserve(v, true);
1148 }
1149 }
1150 }
1151
1152 return cost;
1153 }
1154
1155 static bool CheckSignalAutoFill(TileIndex &tile, Trackdir &trackdir, int &signal_ctr, bool remove)
1156 {
1157 tile = AddTileIndexDiffCWrap(tile, _trackdelta[trackdir]);
1158 if (tile == INVALID_TILE) return false;
1159
1160 /* Check for track bits on the new tile */
1161 TrackdirBits trackdirbits = TrackStatusToTrackdirBits(GetTileTrackStatus(tile, TRANSPORT_RAIL, 0));
1162
1163 if (TracksOverlap(TrackdirBitsToTrackBits(trackdirbits))) return false;
1164 trackdirbits &= TrackdirReachesTrackdirs(trackdir);
1165
1166 /* No track bits, must stop */
1167 if (trackdirbits == TRACKDIR_BIT_NONE) return false;
1168
1169 /* Get the first track dir */
1170 trackdir = RemoveFirstTrackdir(&trackdirbits);
1171
1172 /* Any left? It's a junction so we stop */
1173 if (trackdirbits != TRACKDIR_BIT_NONE) return false;
1174
1175 switch (GetTileType(tile)) {
1176 case MP_RAILWAY:
1177 if (IsRailDepot(tile)) return false;
1178 if (!remove && HasSignalOnTrack(tile, TrackdirToTrack(trackdir))) return false;
1179 signal_ctr++;
1180 if (IsDiagonalTrackdir(trackdir)) {
1181 signal_ctr++;
1182 /* Ensure signal_ctr even so X and Y pieces get signals */
1183 ClrBit(signal_ctr, 0);
1184 }
1185 return true;
1186
1187 case MP_ROAD:
1188 if (!IsLevelCrossing(tile)) return false;
1189 signal_ctr += 2;
1190 return true;
1191
1192 case MP_TUNNELBRIDGE: {
1193 TileIndex orig_tile = tile; // backup old value
1194
1195 if (GetTunnelBridgeTransportType(tile) != TRANSPORT_RAIL) return false;
1196 if (GetTunnelBridgeDirection(tile) != TrackdirToExitdir(trackdir)) return false;
1197
1198 /* Skip to end of tunnel or bridge
1199 * note that tile is a parameter by reference, so it must be updated */
1200 tile = GetOtherTunnelBridgeEnd(tile);
1201
1202 signal_ctr += (GetTunnelBridgeLength(orig_tile, tile) + 2) * 2;
1203 return true;
1204 }
1205
1206 default: return false;
1207 }
1208 }
1209
1227 static CommandCost CmdSignalTrackHelper(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
1228 {
1229 CommandCost total_cost(EXPENSES_CONSTRUCTION);
1230 TileIndex start_tile = tile;
1231
1232 Track track = Extract<Track, 0, 3>(p2);
1233 bool mode = HasBit(p2, 3);
1234 bool semaphores = HasBit(p2, 4);
1235 bool remove = HasBit(p2, 5);
1236 bool autofill = HasBit(p2, 6);
1237 bool minimise_gaps = HasBit(p2, 10);
1238 byte signal_density = GB(p2, 24, 8);
1239
1240 if (p1 >= MapSize() || !ValParamTrackOrientation(track)) return CMD_ERROR;
1241 TileIndex end_tile = p1;
1242 if (signal_density == 0 || signal_density > 20) return CMD_ERROR;
1243
1244 if (!IsPlainRailTile(tile)) return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
1245
1246 /* for vertical/horizontal tracks, double the given signals density
1247 * since the original amount will be too dense (shorter tracks) */
1248 signal_density *= 2;
1249
1250 Trackdir trackdir = TrackToTrackdir(track);
1251 CommandCost ret = ValidateAutoDrag(&trackdir, tile, end_tile);
1252 if (ret.Failed()) return ret;
1253
1254 track = TrackdirToTrack(trackdir); // trackdir might have changed, keep track in sync
1255 Trackdir start_trackdir = trackdir;
1256
1257 /* Must start on a valid track to be able to avoid loops */
1258 if (!HasTrack(tile, track)) return CMD_ERROR;
1259
1260 SignalType sigtype = (SignalType)GB(p2, 7, 3);
1261 if (sigtype > SIGTYPE_LAST) return CMD_ERROR;
1262
1263 byte signals;
1264 /* copy the signal-style of the first rail-piece if existing */
1265 if (HasSignalOnTrack(tile, track)) {
1266 signals = GetPresentSignals(tile) & SignalOnTrack(track);
1267 assert(signals != 0);
1268
1269 /* copy signal/semaphores style (independent of CTRL) */
1270 semaphores = GetSignalVariant(tile, track) != SIG_ELECTRIC;
1271
1272 sigtype = GetSignalType(tile, track);
1273 /* Don't but copy entry or exit-signal type */
1274 if (sigtype == SIGTYPE_ENTRY || sigtype == SIGTYPE_EXIT) sigtype = SIGTYPE_NORMAL;
1275 } else { // no signals exist, drag a two-way signal stretch
1276 signals = IsPbsSignal(sigtype) ? SignalAlongTrackdir(trackdir) : SignalOnTrack(track);
1277 }
1278
1279 byte signal_dir = 0;
1280 if (signals & SignalAlongTrackdir(trackdir)) SetBit(signal_dir, 0);
1281 if (signals & SignalAgainstTrackdir(trackdir)) SetBit(signal_dir, 1);
1282
1283 /* signal_ctr - amount of tiles already processed
1284 * last_used_ctr - amount of tiles before previously placed signal
1285 * signals_density - setting to put signal on every Nth tile (double space on |, -- tracks)
1286 * last_suitable_ctr - amount of tiles before last possible signal place
1287 * last_suitable_tile - last tile where it is possible to place a signal
1288 * last_suitable_trackdir - trackdir of the last tile
1289 **********
1290 * trackdir - trackdir to build with autorail
1291 * semaphores - semaphores or signals
1292 * signals - is there a signal/semaphore on the first tile, copy its style (two-way/single-way)
1293 * and convert all others to semaphore/signal
1294 * remove - 1 remove signals, 0 build signals */
1295 int signal_ctr = 0;
1296 int last_used_ctr = INT_MIN; // initially INT_MIN to force building/removing at the first tile
1297 int last_suitable_ctr = 0;
1298 TileIndex last_suitable_tile = INVALID_TILE;
1299 Trackdir last_suitable_trackdir = INVALID_TRACKDIR;
1300 CommandCost last_error = CMD_ERROR;
1301 bool had_success = false;
1302 for (;;) {
1303 /* only build/remove signals with the specified density */
1304 if (remove || minimise_gaps || signal_ctr % signal_density == 0) {
1305 uint32 p1 = GB(TrackdirToTrack(trackdir), 0, 3);
1306 SB(p1, 3, 1, mode);
1307 SB(p1, 4, 1, semaphores);
1308 SB(p1, 5, 3, sigtype);
1309 if (!remove && signal_ctr == 0) SetBit(p1, 17);
1310
1311 /* Pick the correct orientation for the track direction */
1312 signals = 0;
1313 if (HasBit(signal_dir, 0)) signals |= SignalAlongTrackdir(trackdir);
1314 if (HasBit(signal_dir, 1)) signals |= SignalAgainstTrackdir(trackdir);
1315
1316 /* Test tiles in between for suitability as well if minimising gaps. */
1317 bool test_only = !remove && minimise_gaps && signal_ctr < (last_used_ctr + signal_density);
1318 CommandCost ret = DoCommand(tile, p1, signals, test_only ? flags & ~DC_EXEC : flags, remove ? CMD_REMOVE_SIGNALS : CMD_BUILD_SIGNALS);
1319
1320 if (ret.Succeeded()) {
1321 /* Remember last track piece where we can place a signal. */
1322 last_suitable_ctr = signal_ctr;
1323 last_suitable_tile = tile;
1324 last_suitable_trackdir = trackdir;
1325 } else if (!test_only && last_suitable_tile != INVALID_TILE) {
1326 /* If a signal can't be placed, place it at the last possible position. */
1327 SB(p1, 0, 3, TrackdirToTrack(last_suitable_trackdir));
1328 ClrBit(p1, 17);
1329
1330 /* Pick the correct orientation for the track direction. */
1331 signals = 0;
1332 if (HasBit(signal_dir, 0)) signals |= SignalAlongTrackdir(last_suitable_trackdir);
1333 if (HasBit(signal_dir, 1)) signals |= SignalAgainstTrackdir(last_suitable_trackdir);
1334
1335 ret = DoCommand(last_suitable_tile, p1, signals, flags, remove ? CMD_REMOVE_SIGNALS : CMD_BUILD_SIGNALS);
1336 }
1337
1338 /* Collect cost. */
1339 if (!test_only) {
1340 /* Be user-friendly and try placing signals as much as possible */
1341 if (ret.Succeeded()) {
1342 had_success = true;
1343 total_cost.AddCost(ret);
1344 last_used_ctr = last_suitable_ctr;
1345 last_suitable_tile = INVALID_TILE;
1346 } else {
1347 /* The "No railway" error is the least important one. */
1348 if (ret.GetErrorMessage() != STR_ERROR_THERE_IS_NO_RAILROAD_TRACK ||
1349 last_error.GetErrorMessage() == INVALID_STRING_ID) {
1350 last_error = ret;
1351 }
1352 }
1353 }
1354 }
1355
1356 if (autofill) {
1357 if (!CheckSignalAutoFill(tile, trackdir, signal_ctr, remove)) break;
1358
1359 /* Prevent possible loops */
1360 if (tile == start_tile && trackdir == start_trackdir) break;
1361 } else {
1362 if (tile == end_tile) break;
1363
1364 tile += ToTileIndexDiff(_trackdelta[trackdir]);
1365 signal_ctr++;
1366
1367 /* toggle railbit for the non-diagonal tracks (|, -- tracks) */
1368 if (IsDiagonalTrackdir(trackdir)) {
1369 signal_ctr++;
1370 } else {
1371 ToggleBit(trackdir, 0);
1372 }
1373 }
1374 }
1375
1376 return had_success ? total_cost : last_error;
1377 }
1378
1397 CommandCost CmdBuildSignalTrack(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
1398 {
1399 return CmdSignalTrackHelper(tile, flags, p1, p2, text);
1400 }
1401
1414 CommandCost CmdRemoveSingleSignal(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
1415 {
1416 Track track = Extract<Track, 0, 3>(p1);
1417
1418 if (!ValParamTrackOrientation(track) || !IsPlainRailTile(tile) || !HasTrack(tile, track)) {
1419 return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
1420 }
1421 if (!HasSignalOnTrack(tile, track)) {
1422 return_cmd_error(STR_ERROR_THERE_ARE_NO_SIGNALS);
1423 }
1424
1425 /* Only water can remove signals from anyone */
1426 if (_current_company != OWNER_WATER) {
1427 CommandCost ret = CheckTileOwnership(tile);
1428 if (ret.Failed()) return ret;
1429 }
1430
1431 /* Do it? */
1432 if (flags & DC_EXEC) {
1433 Train *v = NULL;
1434 if (HasReservedTracks(tile, TrackToTrackBits(track))) {
1435 v = GetTrainForReservation(tile, track);
1436 } else if (IsPbsSignal(GetSignalType(tile, track))) {
1437 /* PBS signal, might be the end of a path reservation. */
1438 Trackdir td = TrackToTrackdir(track);
1439 for (int i = 0; v == NULL && i < 2; i++, td = ReverseTrackdir(td)) {
1440 /* Only test the active signal side. */
1441 if (!HasSignalOnTrackdir(tile, ReverseTrackdir(td))) continue;
1442 TileIndex next = TileAddByDiagDir(tile, TrackdirToExitdir(td));
1443 TrackBits tracks = TrackdirBitsToTrackBits(TrackdirReachesTrackdirs(td));
1444 if (HasReservedTracks(next, tracks)) {
1445 v = GetTrainForReservation(next, TrackBitsToTrack(GetReservedTrackbits(next) & tracks));
1446 }
1447 }
1448 }
1449 Company::Get(GetTileOwner(tile))->infrastructure.signal -= CountBits(GetPresentSignals(tile));
1450 SetPresentSignals(tile, GetPresentSignals(tile) & ~SignalOnTrack(track));
1451 Company::Get(GetTileOwner(tile))->infrastructure.signal += CountBits(GetPresentSignals(tile));
1452 DirtyCompanyInfrastructureWindows(GetTileOwner(tile));
1453
1454 /* removed last signal from tile? */
1455 if (GetPresentSignals(tile) == 0) {
1456 SetSignalStates(tile, 0);
1457 SetHasSignals(tile, false);
1458 SetSignalVariant(tile, INVALID_TRACK, SIG_ELECTRIC); // remove any possible semaphores
1459 }
1460
1461 AddTrackToSignalBuffer(tile, track, GetTileOwner(tile));
1462 YapfNotifyTrackLayoutChange(tile, track);
1463 if (v != NULL) TryPathReserve(v, false);
1464
1465 MarkTileDirtyByTile(tile);
1466 }
1467
1468 return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_SIGNALS]);
1469 }
1470
1489 CommandCost CmdRemoveSignalTrack(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
1490 {
1491 return CmdSignalTrackHelper(tile, flags, p1, SetBit(p2, 5), text); // bit 5 is remove bit
1492 }
1493
1495 static Vehicle *UpdateTrainPowerProc(Vehicle *v, void *data)
1496 {
1497 if (v->type != VEH_TRAIN) return NULL;
1498
1499 TrainList *affected_trains = static_cast<TrainList*>(data);
1500 affected_trains->Include(Train::From(v)->First());
1501
1502 return NULL;
1503 }
1504
1517 CommandCost CmdConvertRail(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
1518 {
1519 RailType totype = Extract<RailType, 0, 4>(p2);
1520 TileIndex area_start = p1;
1521 TileIndex area_end = tile;
1522 bool diagonal = HasBit(p2, 4);
1523
1524 if (!ValParamRailtype(totype)) return CMD_ERROR;
1525 if (area_start >= MapSize()) return CMD_ERROR;
1526
1527 TrainList affected_trains;
1528
1529 CommandCost cost(EXPENSES_CONSTRUCTION);
1530 CommandCost error = CommandCost(STR_ERROR_NO_SUITABLE_RAILROAD_TRACK); // by default, there is no track to convert.
1531
1532 TileIterator *iter = diagonal ? (TileIterator *)new DiagonalTileIterator(area_start, area_end) : new OrthogonalTileIterator(area_start, area_end);
1533 for (; (tile = *iter) != INVALID_TILE; ++(*iter)) {
1534 TileType tt = GetTileType(tile);
1535
1536 /* Check if there is any track on tile */
1537 switch (tt) {
1538 case MP_RAILWAY:
1539 break;
1540 case MP_STATION:
1541 if (!HasStationRail(tile)) continue;
1542 break;
1543 case MP_ROAD:
1544 if (!IsLevelCrossing(tile)) continue;
1545 if (RailNoLevelCrossings(totype)) {
1546 error.MakeError(STR_ERROR_CROSSING_DISALLOWED);
1547 continue;
1548 }
1549 break;
1550 case MP_TUNNELBRIDGE:
1551 if (GetTunnelBridgeTransportType(tile) != TRANSPORT_RAIL) continue;
1552 break;
1553 default: continue;
1554 }
1555
1556 /* Original railtype we are converting from */
1557 RailType type = GetRailType(tile);
1558
1559 /* Converting to the same type or converting 'hidden' elrail -> rail */
1560 if (type == totype || (_settings_game.vehicle.disable_elrails && totype == RAILTYPE_RAIL && type == RAILTYPE_ELECTRIC)) continue;
1561
1562 /* Trying to convert other's rail */
1563 CommandCost ret = CheckTileOwnership(tile);
1564 if (ret.Failed()) {
1565 error = ret;
1566 continue;
1567 }
1568
1569 SmallVector<Train *, 2> vehicles_affected;
1570
1571 /* Vehicle on the tile when not converting Rail <-> ElRail
1572 * Tunnels and bridges have special check later */
1573 if (tt != MP_TUNNELBRIDGE) {
1574 if (!IsCompatibleRail(type, totype)) {
1575 CommandCost ret = EnsureNoVehicleOnGround(tile);
1576 if (ret.Failed()) {
1577 error = ret;
1578 continue;
1579 }
1580 }
1581 if (flags & DC_EXEC) { // we can safely convert, too
1582 TrackBits reserved = GetReservedTrackbits(tile);
1583 Track track;
1584 while ((track = RemoveFirstTrack(&reserved)) != INVALID_TRACK) {
1585 Train *v = GetTrainForReservation(tile, track);
1586 if (v != NULL && !HasPowerOnRail(v->railtype, totype)) {
1587 /* No power on new rail type, reroute. */
1588 FreeTrainTrackReservation(v);
1589 *vehicles_affected.Append() = v;
1590 }
1591 }
1592
1593 /* Update the company infrastructure counters. */
1594 if (!IsRailStationTile(tile) || !IsStationTileBlocked(tile)) {
1595 Company *c = Company::Get(GetTileOwner(tile));
1596 uint num_pieces = IsLevelCrossingTile(tile) ? LEVELCROSSING_TRACKBIT_FACTOR : 1;
1597 if (IsPlainRailTile(tile)) {
1598 TrackBits bits = GetTrackBits(tile);
1599 num_pieces = CountBits(bits);
1600 if (TracksOverlap(bits)) num_pieces *= num_pieces;
1601 }
1602 c->infrastructure.rail[type] -= num_pieces;
1603 c->infrastructure.rail[totype] += num_pieces;
1604 DirtyCompanyInfrastructureWindows(c->index);
1605 }
1606
1607 SetRailType(tile, totype);
1608 MarkTileDirtyByTile(tile);
1609 /* update power of train on this tile */
1610 FindVehicleOnPos(tile, &affected_trains, &UpdateTrainPowerProc);
1611 }
1612 }
1613
1614 switch (tt) {
1615 case MP_RAILWAY:
1616 switch (GetRailTileType(tile)) {
1617 case RAIL_TILE_DEPOT:
1618 if (flags & DC_EXEC) {
1619 /* notify YAPF about the track layout change */
1620 YapfNotifyTrackLayoutChange(tile, GetRailDepotTrack(tile));
1621
1622 /* Update build vehicle window related to this depot */
1623 InvalidateWindowData(WC_VEHICLE_DEPOT, tile);
1624 InvalidateWindowData(WC_BUILD_VEHICLE, tile);
1625 }
1626 cost.AddCost(RailConvertCost(type, totype));
1627 break;
1628
1629 default: // RAIL_TILE_NORMAL, RAIL_TILE_SIGNALS
1630 if (flags & DC_EXEC) {
1631 /* notify YAPF about the track layout change */
1632 TrackBits tracks = GetTrackBits(tile);
1633 while (tracks != TRACK_BIT_NONE) {
1634 YapfNotifyTrackLayoutChange(tile, RemoveFirstTrack(&tracks));
1635 }
1636 }
1637 cost.AddCost(RailConvertCost(type, totype) * CountBits(GetTrackBits(tile)));
1638 break;
1639 }
1640 break;
1641
1642 case MP_TUNNELBRIDGE: {
1643 TileIndex endtile = GetOtherTunnelBridgeEnd(tile);
1644
1645 /* If both ends of tunnel/bridge are in the range, do not try to convert twice -
1646 * it would cause assert because of different test and exec runs */
1647 if (endtile < tile) {
1648 if (diagonal) {
1649 if (DiagonalTileArea(area_start, area_end).Contains(endtile)) continue;
1650 } else {
1651 if (OrthogonalTileArea(area_start, area_end).Contains(endtile)) continue;
1652 }
1653 }
1654
1655 /* When not converting rail <-> el. rail, any vehicle cannot be in tunnel/bridge */
1656 if (!IsCompatibleRail(GetRailType(tile), totype)) {
1657 CommandCost ret = TunnelBridgeIsFree(tile, endtile);
1658 if (ret.Failed()) {
1659 error = ret;
1660 continue;
1661 }
1662 }
1663
1664 if (flags & DC_EXEC) {
1665 Track track = DiagDirToDiagTrack(GetTunnelBridgeDirection(tile));
1666 if (HasTunnelBridgeReservation(tile)) {
1667 Train *v = GetTrainForReservation(tile, track);
1668 if (v != NULL && !HasPowerOnRail(v->railtype, totype)) {
1669 /* No power on new rail type, reroute. */
1670 FreeTrainTrackReservation(v);
1671 *vehicles_affected.Append() = v;
1672 }
1673 }
1674
1675 /* Update the company infrastructure counters. */
1676 uint num_pieces = (GetTunnelBridgeLength(tile, endtile) + 2) * TUNNELBRIDGE_TRACKBIT_FACTOR;
1677 Company *c = Company::Get(GetTileOwner(tile));
1678 c->infrastructure.rail[GetRailType(tile)] -= num_pieces;
1679 c->infrastructure.rail[totype] += num_pieces;
1680 DirtyCompanyInfrastructureWindows(c->index);
1681
1682 SetRailType(tile, totype);
1683 SetRailType(endtile, totype);
1684
1685 FindVehicleOnPos(tile, &affected_trains, &UpdateTrainPowerProc);
1686 FindVehicleOnPos(endtile, &affected_trains, &UpdateTrainPowerProc);
1687
1688 YapfNotifyTrackLayoutChange(tile, track);
1689 YapfNotifyTrackLayoutChange(endtile, track);
1690
1691 if (IsBridge(tile)) {
1692 MarkBridgeDirty(tile);
1693 } else {
1694 MarkTileDirtyByTile(tile);
1695 MarkTileDirtyByTile(endtile);
1696 }
1697 }
1698
1699 cost.AddCost((GetTunnelBridgeLength(tile, endtile) + 2) * RailConvertCost(type, totype));
1700 break;
1701 }
1702
1703 default: // MP_STATION, MP_ROAD
1704 if (flags & DC_EXEC) {
1705 Track track = ((tt == MP_STATION) ? GetRailStationTrack(tile) : GetCrossingRailTrack(tile));
1706 YapfNotifyTrackLayoutChange(tile, track);
1707 }
1708
1709 cost.AddCost(RailConvertCost(type, totype));
1710 break;
1711 }
1712
1713 for (uint i = 0; i < vehicles_affected.Length(); ++i) {
1714 TryPathReserve(vehicles_affected[i], true);
1715 }
1716 }
1717
1718 if (flags & DC_EXEC) {
1719 /* Railtype changed, update trains as when entering different track */
1720 for (Train **v = affected_trains.Begin(); v != affected_trains.End(); v++) {
1721 (*v)->ConsistChanged(CCF_TRACK);
1722 }
1723 }
1724
1725 delete iter;
1726 return (cost.GetCost() == 0) ? error : cost;
1727 }
1728
1729 static CommandCost RemoveTrainDepot(TileIndex tile, DoCommandFlag flags)
1730 {
1731 if (_current_company != OWNER_WATER) {
1732 CommandCost ret = CheckTileOwnership(tile);
1733 if (ret.Failed()) return ret;
1734 }
1735
1736 CommandCost ret = EnsureNoVehicleOnGround(tile);
1737 if (ret.Failed()) return ret;
1738
1739 if (flags & DC_EXEC) {
1740 /* read variables before the depot is removed */
1741 DiagDirection dir = GetRailDepotDirection(tile);
1742 Owner owner = GetTileOwner(tile);
1743 Train *v = NULL;
1744
1745 if (HasDepotReservation(tile)) {
1746 v = GetTrainForReservation(tile, DiagDirToDiagTrack(dir));
1747 if (v != NULL) FreeTrainTrackReservation(v);
1748 }
1749
1750 Company::Get(owner)->infrastructure.rail[GetRailType(tile)]--;
1751 DirtyCompanyInfrastructureWindows(owner);
1752
1753 delete Depot::GetByTile(tile);
1754 DoClearSquare(tile);
1755 AddSideToSignalBuffer(tile, dir, owner);
1756 YapfNotifyTrackLayoutChange(tile, DiagDirToDiagTrack(dir));
1757 if (v != NULL) TryPathReserve(v, true);
1758 }
1759
1760 return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_DEPOT_TRAIN]);
1761 }
1762
1763 static CommandCost ClearTile_Track(TileIndex tile, DoCommandFlag flags)
1764 {
1765 CommandCost cost(EXPENSES_CONSTRUCTION);
1766
1767 if (flags & DC_AUTO) {
1768 if (!IsTileOwner(tile, _current_company)) {
1769 return_cmd_error(STR_ERROR_AREA_IS_OWNED_BY_ANOTHER);
1770 }
1771
1772 if (IsPlainRail(tile)) {
1773 return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
1774 } else {
1775 return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
1776 }
1777 }
1778
1779 switch (GetRailTileType(tile)) {
1780 case RAIL_TILE_SIGNALS:
1781 case RAIL_TILE_NORMAL: {
1782 Slope tileh = GetTileSlope(tile);
1783 /* Is there flat water on the lower halftile that gets cleared expensively? */
1784 bool water_ground = (GetRailGroundType(tile) == RAIL_GROUND_WATER && IsSlopeWithOneCornerRaised(tileh));
1785
1786 TrackBits tracks = GetTrackBits(tile);
1787 while (tracks != TRACK_BIT_NONE) {
1788 Track track = RemoveFirstTrack(&tracks);
1789 CommandCost ret = DoCommand(tile, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
1790 if (ret.Failed()) return ret;
1791 cost.AddCost(ret);
1792 }
1793
1794 /* When bankrupting, don't make water dirty, there could be a ship on lower halftile.
1795 * Same holds for non-companies clearing the tile, e.g. disasters. */
1796 if (water_ground && !(flags & DC_BANKRUPT) && Company::IsValidID(_current_company)) {
1797 CommandCost ret = EnsureNoVehicleOnGround(tile);
1798 if (ret.Failed()) return ret;
1799
1800 /* The track was removed, and left a coast tile. Now also clear the water. */
1801 if (flags & DC_EXEC) DoClearSquare(tile);
1802 cost.AddCost(_price[PR_CLEAR_WATER]);
1803 }
1804
1805 return cost;
1806 }
1807
1808 case RAIL_TILE_DEPOT:
1809 return RemoveTrainDepot(tile, flags);
1810
1811 default:
1812 return CMD_ERROR;
1813 }
1814 }
1815
1820 static uint GetSaveSlopeZ(uint x, uint y, Track track)
1821 {
1822 switch (track) {
1823 case TRACK_UPPER: x &= ~0xF; y &= ~0xF; break;
1824 case TRACK_LOWER: x |= 0xF; y |= 0xF; break;
1825 case TRACK_LEFT: x |= 0xF; y &= ~0xF; break;
1826 case TRACK_RIGHT: x &= ~0xF; y |= 0xF; break;
1827 default: break;
1828 }
1829 return GetSlopePixelZ(x, y);
1830 }
1831
1832 static void DrawSingleSignal(TileIndex tile, const RailtypeInfo *rti, Track track, SignalState condition, SignalOffsets image, uint pos)
1833 {
1834 bool side;
1835 switch (_settings_game.construction.train_signal_side) {
1836 case 0: side = false; break; // left
1837 case 2: side = true; break; // right
1838 default: side = _settings_game.vehicle.road_side != 0; break; // driving side
1839 }
1840 static const Point SignalPositions[2][12] = {
1841 { // Signals on the left side
1842 /* LEFT LEFT RIGHT RIGHT UPPER UPPER */
1843 { 8, 5}, {14, 1}, { 1, 14}, { 9, 11}, { 1, 0}, { 3, 10},
1844 /* LOWER LOWER X X Y Y */
1845 {11, 4}, {14, 14}, {11, 3}, { 4, 13}, { 3, 4}, {11, 13}
1846 }, { // Signals on the right side
1847 /* LEFT LEFT RIGHT RIGHT UPPER UPPER */
1848 {14, 1}, {12, 10}, { 4, 6}, { 1, 14}, {10, 4}, { 0, 1},
1849 /* LOWER LOWER X X Y Y */
1850 {14, 14}, { 5, 12}, {11, 13}, { 4, 3}, {13, 4}, { 3, 11}
1851 }
1852 };
1853
1854 uint x = TileX(tile) * TILE_SIZE + SignalPositions[side][pos].x;
1855 uint y = TileY(tile) * TILE_SIZE + SignalPositions[side][pos].y;
1856
1857 SignalType type = GetSignalType(tile, track);
1858 SignalVariant variant = GetSignalVariant(tile, track);
1859
1860 SpriteID sprite = GetCustomSignalSprite(rti, tile, type, variant, condition);
1861 if (sprite != 0) {
1862 sprite += image;
1863 } else {
1864 /* Normal electric signals are stored in a different sprite block than all other signals. */
1865 sprite = (type == SIGTYPE_NORMAL && variant == SIG_ELECTRIC) ? SPR_ORIGINAL_SIGNALS_BASE : SPR_SIGNALS_BASE - 16;
1866 sprite += type * 16 + variant * 64 + image * 2 + condition + (type > SIGTYPE_LAST_NOPBS ? 64 : 0);
1867 }
1868
1869 AddSortableSpriteToDraw(sprite, PAL_NONE, x, y, 1, 1, BB_HEIGHT_UNDER_BRIDGE, GetSaveSlopeZ(x, y, track));
1870 }
1871
1872 static uint32 _drawtile_track_palette;
1873
1874
1875 static void DrawTrackFence_NW(const TileInfo *ti, SpriteID base_image)
1876 {
1877 RailFenceOffset rfo = RFO_FLAT_X;
1878 if (ti->tileh & SLOPE_NW) rfo = (ti->tileh & SLOPE_W) ? RFO_SLOPE_SW : RFO_SLOPE_NE;
1879 AddSortableSpriteToDraw(base_image + rfo, _drawtile_track_palette,
1880 ti->x, ti->y + 1, 16, 1, 4, ti->z);
1881 }
1882
1883 static void DrawTrackFence_SE(const TileInfo *ti, SpriteID base_image)
1884 {
1885 RailFenceOffset rfo = RFO_FLAT_X;
1886 if (ti->tileh & SLOPE_SE) rfo = (ti->tileh & SLOPE_S) ? RFO_SLOPE_SW : RFO_SLOPE_NE;
1887 AddSortableSpriteToDraw(base_image + rfo, _drawtile_track_palette,
1888 ti->x, ti->y + TILE_SIZE - 1, 16, 1, 4, ti->z);
1889 }
1890
1891 static void DrawTrackFence_NW_SE(const TileInfo *ti, SpriteID base_image)
1892 {
1893 DrawTrackFence_NW(ti, base_image);
1894 DrawTrackFence_SE(ti, base_image);
1895 }
1896
1897 static void DrawTrackFence_NE(const TileInfo *ti, SpriteID base_image)
1898 {
1899 RailFenceOffset rfo = RFO_FLAT_Y;
1900 if (ti->tileh & SLOPE_NE) rfo = (ti->tileh & SLOPE_E) ? RFO_SLOPE_SE : RFO_SLOPE_NW;
1901 AddSortableSpriteToDraw(base_image + rfo, _drawtile_track_palette,
1902 ti->x + 1, ti->y, 1, 16, 4, ti->z);
1903 }
1904
1905 static void DrawTrackFence_SW(const TileInfo *ti, SpriteID base_image)
1906 {
1907 RailFenceOffset rfo = RFO_FLAT_Y;
1908 if (ti->tileh & SLOPE_SW) rfo = (ti->tileh & SLOPE_S) ? RFO_SLOPE_SE : RFO_SLOPE_NW;
1909 AddSortableSpriteToDraw(base_image + rfo, _drawtile_track_palette,
1910 ti->x + TILE_SIZE - 1, ti->y, 1, 16, 4, ti->z);
1911 }
1912
1913 static void DrawTrackFence_NE_SW(const TileInfo *ti, SpriteID base_image)
1914 {
1915 DrawTrackFence_NE(ti, base_image);
1916 DrawTrackFence_SW(ti, base_image);
1917 }
1918
1922 static void DrawTrackFence_NS_1(const TileInfo *ti, SpriteID base_image)
1923 {
1924 int z = ti->z + GetSlopePixelZInCorner(RemoveHalftileSlope(ti->tileh), CORNER_W);
1925 AddSortableSpriteToDraw(base_image + RFO_FLAT_VERT, _drawtile_track_palette,
1926 ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
1927 }
1928
1932 static void DrawTrackFence_NS_2(const TileInfo *ti, SpriteID base_image)
1933 {
1934 int z = ti->z + GetSlopePixelZInCorner(RemoveHalftileSlope(ti->tileh), CORNER_E);
1935 AddSortableSpriteToDraw(base_image + RFO_FLAT_VERT, _drawtile_track_palette,
1936 ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
1937 }
1938
1942 static void DrawTrackFence_WE_1(const TileInfo *ti, SpriteID base_image)
1943 {
1944 int z = ti->z + GetSlopePixelZInCorner(RemoveHalftileSlope(ti->tileh), CORNER_N);
1945 AddSortableSpriteToDraw(base_image + RFO_FLAT_HORZ, _drawtile_track_palette,
1946 ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
1947 }
1948
1952 static void DrawTrackFence_WE_2(const TileInfo *ti, SpriteID base_image)
1953 {
1954 int z = ti->z + GetSlopePixelZInCorner(RemoveHalftileSlope(ti->tileh), CORNER_S);
1955 AddSortableSpriteToDraw(base_image + RFO_FLAT_HORZ, _drawtile_track_palette,
1956 ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
1957 }
1958
1959
1960 static void DrawTrackDetails(const TileInfo *ti, const RailtypeInfo *rti)
1961 {
1962 /* Base sprite for track fences.
1963 * Note: Halftile slopes only have fences on the upper part. */
1964 SpriteID base_image = GetCustomRailSprite(rti, ti->tile, RTSG_FENCES, IsHalftileSlope(ti->tileh) ? TCX_UPPER_HALFTILE : TCX_NORMAL);
1965 if (base_image == 0) base_image = SPR_TRACK_FENCE_FLAT_X;
1966
1967 switch (GetRailGroundType(ti->tile)) {
1968 case RAIL_GROUND_FENCE_NW: DrawTrackFence_NW(ti, base_image); break;
1969 case RAIL_GROUND_FENCE_SE: DrawTrackFence_SE(ti, base_image); break;
1970 case RAIL_GROUND_FENCE_SENW: DrawTrackFence_NW_SE(ti, base_image); break;
1971 case RAIL_GROUND_FENCE_NE: DrawTrackFence_NE(ti, base_image); break;
1972 case RAIL_GROUND_FENCE_SW: DrawTrackFence_SW(ti, base_image); break;
1973 case RAIL_GROUND_FENCE_NESW: DrawTrackFence_NE_SW(ti, base_image); break;
1974 case RAIL_GROUND_FENCE_VERT1: DrawTrackFence_NS_1(ti, base_image); break;
1975 case RAIL_GROUND_FENCE_VERT2: DrawTrackFence_NS_2(ti, base_image); break;
1976 case RAIL_GROUND_FENCE_HORIZ1: DrawTrackFence_WE_1(ti, base_image); break;
1977 case RAIL_GROUND_FENCE_HORIZ2: DrawTrackFence_WE_2(ti, base_image); break;
1978 case RAIL_GROUND_WATER: {
1979 Corner track_corner;
1980 if (IsHalftileSlope(ti->tileh)) {
1981 /* Steep slope or one-corner-raised slope with halftile foundation */
1982 track_corner = GetHalftileSlopeCorner(ti->tileh);
1983 } else {
1984 /* Three-corner-raised slope */
1985 track_corner = OppositeCorner(GetHighestSlopeCorner(ComplementSlope(ti->tileh)));
1986 }
1987 switch (track_corner) {
1988 case CORNER_W: DrawTrackFence_NS_1(ti, base_image); break;
1989 case CORNER_S: DrawTrackFence_WE_2(ti, base_image); break;
1990 case CORNER_E: DrawTrackFence_NS_2(ti, base_image); break;
1991 case CORNER_N: DrawTrackFence_WE_1(ti, base_image); break;
1992 default: NOT_REACHED();
1993 }
1994 break;
1995 }
1996 default: break;
1997 }
1998 }
1999
2000 /* SubSprite for drawing the track halftile of 'three-corners-raised'-sloped rail sprites. */
2001 static const int INF = 1000; // big number compared to tilesprite size
2002 static const SubSprite _halftile_sub_sprite[4] = {
2003 { -INF , -INF , 32 - 33, INF }, // CORNER_W, clip 33 pixels from right
2004 { -INF , 0 + 7, INF , INF }, // CORNER_S, clip 7 pixels from top
2005 { -31 + 33, -INF , INF , INF }, // CORNER_E, clip 33 pixels from left
2006 { -INF , -INF , INF , 30 - 23 } // CORNER_N, clip 23 pixels from bottom
2007 };
2008
2009 static inline void DrawTrackSprite(SpriteID sprite, PaletteID pal, const TileInfo *ti, Slope s)
2010 {
2011 DrawGroundSprite(sprite, pal, NULL, 0, (ti->tileh & s) ? -8 : 0);
2012 }
2013
2014 static void DrawTrackBitsOverlay(TileInfo *ti, TrackBits track, const RailtypeInfo *rti)
2015 {
2016 RailGroundType rgt = GetRailGroundType(ti->tile);
2017 Foundation f = GetRailFoundation(ti->tileh, track);
2018 Corner halftile_corner = CORNER_INVALID;
2019
2020 if (IsNonContinuousFoundation(f)) {
2021 /* Save halftile corner */
2022 halftile_corner = (f == FOUNDATION_STEEP_BOTH ? GetHighestSlopeCorner(ti->tileh) : GetHalftileFoundationCorner(f));
2023 /* Draw lower part first */
2024 track &= ~CornerToTrackBits(halftile_corner);
2025 f = (f == FOUNDATION_STEEP_BOTH ? FOUNDATION_STEEP_LOWER : FOUNDATION_NONE);
2026 }
2027
2028 DrawFoundation(ti, f);
2029 /* DrawFoundation modifies ti */
2030
2031 /* Draw ground */
2032 if (rgt == RAIL_GROUND_WATER) {
2033 if (track != TRACK_BIT_NONE || IsSteepSlope(ti->tileh)) {
2034 /* three-corner-raised slope or steep slope with track on upper part */
2035 DrawShoreTile(ti->tileh);
2036 } else {
2037 /* single-corner-raised slope with track on upper part */
2038 DrawGroundSprite(SPR_FLAT_WATER_TILE, PAL_NONE);
2039 }
2040 } else {
2041 SpriteID image;
2042
2043 switch (rgt) {
2044 case RAIL_GROUND_BARREN: image = SPR_FLAT_BARE_LAND; break;
2045 case RAIL_GROUND_ICE_DESERT: image = SPR_FLAT_SNOW_DESERT_TILE; break;
2046 default: image = SPR_FLAT_GRASS_TILE; break;
2047 }
2048
2049 image += SlopeToSpriteOffset(ti->tileh);
2050
2051 DrawGroundSprite(image, PAL_NONE);
2052 }
2053
2054 SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
2055 SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
2056 TrackBits pbs = _settings_client.gui.show_track_reservation ? GetRailReservationTrackBits(ti->tile) : TRACK_BIT_NONE;
2057
2058 if (track == TRACK_BIT_NONE) {
2059 /* Half-tile foundation, no track here? */
2060 } else if (ti->tileh == SLOPE_NW && track == TRACK_BIT_Y) {
2061 DrawGroundSprite(ground + RTO_SLOPE_NW, PAL_NONE);
2062 if (pbs != TRACK_BIT_NONE) DrawGroundSprite(overlay + 9, PALETTE_CRASH);
2063 } else if (ti->tileh == SLOPE_NE && track == TRACK_BIT_X) {
2064 DrawGroundSprite(ground + RTO_SLOPE_NE, PAL_NONE);
2065 if (pbs != TRACK_BIT_NONE) DrawGroundSprite(overlay + 6, PALETTE_CRASH);
2066 } else if (ti->tileh == SLOPE_SE && track == TRACK_BIT_Y) {
2067 DrawGroundSprite(ground + RTO_SLOPE_SE, PAL_NONE);
2068 if (pbs != TRACK_BIT_NONE) DrawGroundSprite(overlay + 7, PALETTE_CRASH);
2069 } else if (ti->tileh == SLOPE_SW && track == TRACK_BIT_X) {
2070 DrawGroundSprite(ground + RTO_SLOPE_SW, PAL_NONE);
2071 if (pbs != TRACK_BIT_NONE) DrawGroundSprite(overlay + 8, PALETTE_CRASH);
2072 } else {
2073 switch (track) {
2074 /* Draw single ground sprite when not overlapping. No track overlay
2075 * is necessary for these sprites. */
2076 case TRACK_BIT_X: DrawGroundSprite(ground + RTO_X, PAL_NONE); break;
2077 case TRACK_BIT_Y: DrawGroundSprite(ground + RTO_Y, PAL_NONE); break;
2078 case TRACK_BIT_UPPER: DrawTrackSprite(ground + RTO_N, PAL_NONE, ti, SLOPE_N); break;
2079 case TRACK_BIT_LOWER: DrawTrackSprite(ground + RTO_S, PAL_NONE, ti, SLOPE_S); break;
2080 case TRACK_BIT_RIGHT: DrawTrackSprite(ground + RTO_E, PAL_NONE, ti, SLOPE_E); break;
2081 case TRACK_BIT_LEFT: DrawTrackSprite(ground + RTO_W, PAL_NONE, ti, SLOPE_W); break;
2082 case TRACK_BIT_CROSS: DrawGroundSprite(ground + RTO_CROSSING_XY, PAL_NONE); break;
2083 case TRACK_BIT_HORZ: DrawTrackSprite(ground + RTO_N, PAL_NONE, ti, SLOPE_N);
2084 DrawTrackSprite(ground + RTO_S, PAL_NONE, ti, SLOPE_S); break;
2085 case TRACK_BIT_VERT: DrawTrackSprite(ground + RTO_E, PAL_NONE, ti, SLOPE_E);
2086 DrawTrackSprite(ground + RTO_W, PAL_NONE, ti, SLOPE_W); break;
2087
2088 default:
2089 /* We're drawing a junction tile */
2090 if ((track & TRACK_BIT_3WAY_NE) == 0) {
2091 DrawGroundSprite(ground + RTO_JUNCTION_SW, PAL_NONE);
2092 } else if ((track & TRACK_BIT_3WAY_SW) == 0) {
2093 DrawGroundSprite(ground + RTO_JUNCTION_NE, PAL_NONE);
2094 } else if ((track & TRACK_BIT_3WAY_NW) == 0) {
2095 DrawGroundSprite(ground + RTO_JUNCTION_SE, PAL_NONE);
2096 } else if ((track & TRACK_BIT_3WAY_SE) == 0) {
2097 DrawGroundSprite(ground + RTO_JUNCTION_NW, PAL_NONE);
2098 } else {
2099 DrawGroundSprite(ground + RTO_JUNCTION_NSEW, PAL_NONE);
2100 }
2101
2102 /* Mask out PBS bits as we shall draw them afterwards anyway. */
2103 track &= ~pbs;
2104
2105 /* Draw regular track bits */
2106 if (track & TRACK_BIT_X) DrawGroundSprite(overlay + RTO_X, PAL_NONE);
2107 if (track & TRACK_BIT_Y) DrawGroundSprite(overlay + RTO_Y, PAL_NONE);
2108 if (track & TRACK_BIT_UPPER) DrawGroundSprite(overlay + RTO_N, PAL_NONE);
2109 if (track & TRACK_BIT_LOWER) DrawGroundSprite(overlay + RTO_S, PAL_NONE);
2110 if (track & TRACK_BIT_RIGHT) DrawGroundSprite(overlay + RTO_E, PAL_NONE);
2111 if (track & TRACK_BIT_LEFT) DrawGroundSprite(overlay + RTO_W, PAL_NONE);
2112 }
2113
2114 /* Draw reserved track bits */
2115 if (pbs & TRACK_BIT_X) DrawGroundSprite(overlay + RTO_X, PALETTE_CRASH);
2116 if (pbs & TRACK_BIT_Y) DrawGroundSprite(overlay + RTO_Y, PALETTE_CRASH);
2117 if (pbs & TRACK_BIT_UPPER) DrawTrackSprite(overlay + RTO_N, PALETTE_CRASH, ti, SLOPE_N);
2118 if (pbs & TRACK_BIT_LOWER) DrawTrackSprite(overlay + RTO_S, PALETTE_CRASH, ti, SLOPE_S);
2119 if (pbs & TRACK_BIT_RIGHT) DrawTrackSprite(overlay + RTO_E, PALETTE_CRASH, ti, SLOPE_E);
2120 if (pbs & TRACK_BIT_LEFT) DrawTrackSprite(overlay + RTO_W, PALETTE_CRASH, ti, SLOPE_W);
2121 }
2122
2123 if (IsValidCorner(halftile_corner)) {
2124 DrawFoundation(ti, HalftileFoundation(halftile_corner));
2125 overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY, TCX_UPPER_HALFTILE);
2126 ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND, TCX_UPPER_HALFTILE);
2127
2128 /* Draw higher halftile-overlay: Use the sloped sprites with three corners raised. They probably best fit the lightning. */
2129 Slope fake_slope = SlopeWithThreeCornersRaised(OppositeCorner(halftile_corner));
2130
2131 SpriteID image;
2132 switch (rgt) {
2133 case RAIL_GROUND_BARREN: image = SPR_FLAT_BARE_LAND; break;
2134 case RAIL_GROUND_ICE_DESERT:
2135 case RAIL_GROUND_HALF_SNOW: image = SPR_FLAT_SNOW_DESERT_TILE; break;
2136 default: image = SPR_FLAT_GRASS_TILE; break;
2137 }
2138
2139 image += SlopeToSpriteOffset(fake_slope);
2140
2141 DrawGroundSprite(image, PAL_NONE, &(_halftile_sub_sprite[halftile_corner]));
2142
2143 track = CornerToTrackBits(halftile_corner);
2144
2145 int offset;
2146 switch (track) {
2147 default: NOT_REACHED();
2148 case TRACK_BIT_UPPER: offset = RTO_N; break;
2149 case TRACK_BIT_LOWER: offset = RTO_S; break;
2150 case TRACK_BIT_RIGHT: offset = RTO_E; break;
2151 case TRACK_BIT_LEFT: offset = RTO_W; break;
2152 }
2153
2154 DrawTrackSprite(ground + offset, PAL_NONE, ti, fake_slope);
2155 if (_settings_client.gui.show_track_reservation && HasReservedTracks(ti->tile, track)) {
2156 DrawTrackSprite(overlay + offset, PALETTE_CRASH, ti, fake_slope);
2157 }
2158 }
2159 }
2160
2166 static void DrawTrackBits(TileInfo *ti, TrackBits track)
2167 {
2168 const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
2169
2170 if (rti->UsesOverlay()) {
2171 DrawTrackBitsOverlay(ti, track, rti);
2172 return;
2173 }
2174
2175 RailGroundType rgt = GetRailGroundType(ti->tile);
2176 Foundation f = GetRailFoundation(ti->tileh, track);
2177 Corner halftile_corner = CORNER_INVALID;
2178
2179 if (IsNonContinuousFoundation(f)) {
2180 /* Save halftile corner */
2181 halftile_corner = (f == FOUNDATION_STEEP_BOTH ? GetHighestSlopeCorner(ti->tileh) : GetHalftileFoundationCorner(f));
2182 /* Draw lower part first */
2183 track &= ~CornerToTrackBits(halftile_corner);
2184 f = (f == FOUNDATION_STEEP_BOTH ? FOUNDATION_STEEP_LOWER : FOUNDATION_NONE);
2185 }
2186
2187 DrawFoundation(ti, f);
2188 /* DrawFoundation modifies ti */
2189
2190 SpriteID image;
2191 PaletteID pal = PAL_NONE;
2192 const SubSprite *sub = NULL;
2193 bool junction = false;
2194
2195 /* Select the sprite to use. */
2196 if (track == 0) {
2197 /* Clear ground (only track on halftile foundation) */
2198 if (rgt == RAIL_GROUND_WATER) {
2199 if (IsSteepSlope(ti->tileh)) {
2200 DrawShoreTile(ti->tileh);
2201 image = 0;
2202 } else {
2203 image = SPR_FLAT_WATER_TILE;
2204 }
2205 } else {
2206 switch (rgt) {
2207 case RAIL_GROUND_BARREN: image = SPR_FLAT_BARE_LAND; break;
2208 case RAIL_GROUND_ICE_DESERT: image = SPR_FLAT_SNOW_DESERT_TILE; break;
2209 default: image = SPR_FLAT_GRASS_TILE; break;
2210 }
2211 image += SlopeToSpriteOffset(ti->tileh);
2212 }
2213 } else {
2214 if (ti->tileh != SLOPE_FLAT) {
2215 /* track on non-flat ground */
2216 image = _track_sloped_sprites[ti->tileh - 1] + rti->base_sprites.track_y;
2217 } else {
2218 /* track on flat ground */
2219 (image = rti->base_sprites.track_y, track == TRACK_BIT_Y) ||
2220 (image++, track == TRACK_BIT_X) ||
2221 (image++, track == TRACK_BIT_UPPER) ||
2222 (image++, track == TRACK_BIT_LOWER) ||
2223 (image++, track == TRACK_BIT_RIGHT) ||
2224 (image++, track == TRACK_BIT_LEFT) ||
2225 (image++, track == TRACK_BIT_CROSS) ||
2226
2227 (image = rti->base_sprites.track_ns, track == TRACK_BIT_HORZ) ||
2228 (image++, track == TRACK_BIT_VERT) ||
2229
2230 (junction = true, false) ||
2231 (image = rti->base_sprites.ground, (track & TRACK_BIT_3WAY_NE) == 0) ||
2232 (image++, (track & TRACK_BIT_3WAY_SW) == 0) ||
2233 (image++, (track & TRACK_BIT_3WAY_NW) == 0) ||
2234 (image++, (track & TRACK_BIT_3WAY_SE) == 0) ||
2235 (image++, true);
2236 }
2237
2238 switch (rgt) {
2239 case RAIL_GROUND_BARREN: pal = PALETTE_TO_BARE_LAND; break;
2240 case RAIL_GROUND_ICE_DESERT: image += rti->snow_offset; break;
2241 case RAIL_GROUND_WATER: {
2242 /* three-corner-raised slope */
2243 DrawShoreTile(ti->tileh);
2244 Corner track_corner = OppositeCorner(GetHighestSlopeCorner(ComplementSlope(ti->tileh)));
2245 sub = &(_halftile_sub_sprite[track_corner]);
2246 break;
2247 }
2248 default: break;
2249 }
2250 }
2251
2252 if (image != 0) DrawGroundSprite(image, pal, sub);
2253
2254 /* Draw track pieces individually for junction tiles */
2255 if (junction) {
2256 if (track & TRACK_BIT_X) DrawGroundSprite(rti->base_sprites.single_x, PAL_NONE);
2257 if (track & TRACK_BIT_Y) DrawGroundSprite(rti->base_sprites.single_y, PAL_NONE);
2258 if (track & TRACK_BIT_UPPER) DrawGroundSprite(rti->base_sprites.single_n, PAL_NONE);
2259 if (track & TRACK_BIT_LOWER) DrawGroundSprite(rti->base_sprites.single_s, PAL_NONE);
2260 if (track & TRACK_BIT_LEFT) DrawGroundSprite(rti->base_sprites.single_w, PAL_NONE);
2261 if (track & TRACK_BIT_RIGHT) DrawGroundSprite(rti->base_sprites.single_e, PAL_NONE);
2262 }
2263
2264 /* PBS debugging, draw reserved tracks darker */
2265 if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation) {
2266 /* Get reservation, but mask track on halftile slope */
2267 TrackBits pbs = GetRailReservationTrackBits(ti->tile) & track;
2268 if (pbs & TRACK_BIT_X) {
2269 if (ti->tileh == SLOPE_FLAT || ti->tileh == SLOPE_ELEVATED) {
2270 DrawGroundSprite(rti->base_sprites.single_x, PALETTE_CRASH);
2271 } else {
2272 DrawGroundSprite(_track_sloped_sprites[ti->tileh - 1] + rti->base_sprites.single_sloped - 20, PALETTE_CRASH);
2273 }
2274 }
2275 if (pbs & TRACK_BIT_Y) {
2276 if (ti->tileh == SLOPE_FLAT || ti->tileh == SLOPE_ELEVATED) {
2277 DrawGroundSprite(rti->base_sprites.single_y, PALETTE_CRASH);
2278 } else {
2279 DrawGroundSprite(_track_sloped_sprites[ti->tileh - 1] + rti->base_sprites.single_sloped - 20, PALETTE_CRASH);
2280 }
2281 }
2282 if (pbs & TRACK_BIT_UPPER) DrawGroundSprite(rti->base_sprites.single_n, PALETTE_CRASH, NULL, 0, ti->tileh & SLOPE_N ? -(int)TILE_HEIGHT : 0);
2283 if (pbs & TRACK_BIT_LOWER) DrawGroundSprite(rti->base_sprites.single_s, PALETTE_CRASH, NULL, 0, ti->tileh & SLOPE_S ? -(int)TILE_HEIGHT : 0);
2284 if (pbs & TRACK_BIT_LEFT) DrawGroundSprite(rti->base_sprites.single_w, PALETTE_CRASH, NULL, 0, ti->tileh & SLOPE_W ? -(int)TILE_HEIGHT : 0);
2285 if (pbs & TRACK_BIT_RIGHT) DrawGroundSprite(rti->base_sprites.single_e, PALETTE_CRASH, NULL, 0, ti->tileh & SLOPE_E ? -(int)TILE_HEIGHT : 0);
2286 }
2287
2288 if (IsValidCorner(halftile_corner)) {
2289 DrawFoundation(ti, HalftileFoundation(halftile_corner));
2290
2291 /* Draw higher halftile-overlay: Use the sloped sprites with three corners raised. They probably best fit the lightning. */
2292 Slope fake_slope = SlopeWithThreeCornersRaised(OppositeCorner(halftile_corner));
2293 image = _track_sloped_sprites[fake_slope - 1] + rti->base_sprites.track_y;
2294 pal = PAL_NONE;
2295 switch (rgt) {
2296 case RAIL_GROUND_BARREN: pal = PALETTE_TO_BARE_LAND; break;
2297 case RAIL_GROUND_ICE_DESERT:
2298 case RAIL_GROUND_HALF_SNOW: image += rti->snow_offset; break; // higher part has snow in this case too
2299 default: break;
2300 }
2301 DrawGroundSprite(image, pal, &(_halftile_sub_sprite[halftile_corner]));
2302
2303 if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasReservedTracks(ti->tile, CornerToTrackBits(halftile_corner))) {
2304 static const byte _corner_to_track_sprite[] = {3, 1, 2, 0};
2305 DrawGroundSprite(_corner_to_track_sprite[halftile_corner] + rti->base_sprites.single_n, PALETTE_CRASH, NULL, 0, -(int)TILE_HEIGHT);
2306 }
2307 }
2308 }
2309
2310 static void DrawSignals(TileIndex tile, TrackBits rails, const RailtypeInfo *rti)
2311 {
2312 #define MAYBE_DRAW_SIGNAL(x, y, z, t) if (IsSignalPresent(tile, x)) DrawSingleSignal(tile, rti, t, GetSingleSignalState(tile, x), y, z)
2313
2314 if (!(rails & TRACK_BIT_Y)) {
2315 if (!(rails & TRACK_BIT_X)) {
2316 if (rails & TRACK_BIT_LEFT) {
2317 MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTH, 0, TRACK_LEFT);
2318 MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTH, 1, TRACK_LEFT);
2319 }
2320 if (rails & TRACK_BIT_RIGHT) {
2321 MAYBE_DRAW_SIGNAL(0, SIGNAL_TO_NORTH, 2, TRACK_RIGHT);
2322 MAYBE_DRAW_SIGNAL(1, SIGNAL_TO_SOUTH, 3, TRACK_RIGHT);
2323 }
2324 if (rails & TRACK_BIT_UPPER) {
2325 MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_WEST, 4, TRACK_UPPER);
2326 MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_EAST, 5, TRACK_UPPER);
2327 }
2328 if (rails & TRACK_BIT_LOWER) {
2329 MAYBE_DRAW_SIGNAL(1, SIGNAL_TO_WEST, 6, TRACK_LOWER);
2330 MAYBE_DRAW_SIGNAL(0, SIGNAL_TO_EAST, 7, TRACK_LOWER);
2331 }
2332 } else {
2333 MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTHWEST, 8, TRACK_X);
2334 MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTHEAST, 9, TRACK_X);
2335 }
2336 } else {
2337 MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTHEAST, 10, TRACK_Y);
2338 MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTHWEST, 11, TRACK_Y);
2339 }
2340 }
2341
2342 static void DrawTile_Track(TileInfo *ti)
2343 {
2344 const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
2345
2346 _drawtile_track_palette = COMPANY_SPRITE_COLOUR(GetTileOwner(ti->tile));
2347
2348 if (IsPlainRail(ti->tile)) {
2349 TrackBits rails = GetTrackBits(ti->tile);
2350
2351 DrawTrackBits(ti, rails);
2352
2353 if (HasBit(_display_opt, DO_FULL_DETAIL)) DrawTrackDetails(ti, rti);
2354
2355 if (HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
2356
2357 if (HasSignals(ti->tile)) DrawSignals(ti->tile, rails, rti);
2358 } else {
2359 /* draw depot */
2360 const DrawTileSprites *dts;
2361 PaletteID pal = PAL_NONE;
2362 SpriteID relocation;
2363
2364 if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
2365
2366 if (IsInvisibilitySet(TO_BUILDINGS)) {
2367 /* Draw rail instead of depot */
2368 dts = &_depot_invisible_gfx_table[GetRailDepotDirection(ti->tile)];
2369 } else {
2370 dts = &_depot_gfx_table[GetRailDepotDirection(ti->tile)];
2371 }
2372
2373 SpriteID image;
2374 if (rti->UsesOverlay()) {
2375 image = SPR_FLAT_GRASS_TILE;
2376 } else {
2377 image = dts->ground.sprite;
2378 if (image != SPR_FLAT_GRASS_TILE) image += rti->GetRailtypeSpriteOffset();
2379 }
2380
2381 /* adjust ground tile for desert
2382 * don't adjust for snow, because snow in depots looks weird */
2383 if (IsSnowRailGround(ti->tile) && _settings_game.game_creation.landscape == LT_TROPIC) {
2384 if (image != SPR_FLAT_GRASS_TILE) {
2385 image += rti->snow_offset; // tile with tracks
2386 } else {
2387 image = SPR_FLAT_SNOW_DESERT_TILE; // flat ground
2388 }
2389 }
2390
2391 DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, _drawtile_track_palette));
2392
2393 if (rti->UsesOverlay()) {
2394 SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
2395
2396 switch (GetRailDepotDirection(ti->tile)) {
2397 case DIAGDIR_NE: if (!IsInvisibilitySet(TO_BUILDINGS)) break; // else FALL THROUGH
2398 case DIAGDIR_SW: DrawGroundSprite(ground + RTO_X, PAL_NONE); break;
2399 case DIAGDIR_NW: if (!IsInvisibilitySet(TO_BUILDINGS)) break; // else FALL THROUGH
2400 case DIAGDIR_SE: DrawGroundSprite(ground + RTO_Y, PAL_NONE); break;
2401 default: break;
2402 }
2403
2404 if (_settings_client.gui.show_track_reservation && HasDepotReservation(ti->tile)) {
2405 SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
2406
2407 switch (GetRailDepotDirection(ti->tile)) {
2408 case DIAGDIR_NE: if (!IsInvisibilitySet(TO_BUILDINGS)) break; // else FALL THROUGH
2409 case DIAGDIR_SW: DrawGroundSprite(overlay + RTO_X, PALETTE_CRASH); break;
2410 case DIAGDIR_NW: if (!IsInvisibilitySet(TO_BUILDINGS)) break; // else FALL THROUGH
2411 case DIAGDIR_SE: DrawGroundSprite(overlay + RTO_Y, PALETTE_CRASH); break;
2412 default: break;
2413 }
2414 }
2415 } else {
2416 /* PBS debugging, draw reserved tracks darker */
2417 if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasDepotReservation(ti->tile)) {
2418 switch (GetRailDepotDirection(ti->tile)) {
2419 case DIAGDIR_NE: if (!IsInvisibilitySet(TO_BUILDINGS)) break; // else FALL THROUGH
2420 case DIAGDIR_SW: DrawGroundSprite(rti->base_sprites.single_x, PALETTE_CRASH); break;
2421 case DIAGDIR_NW: if (!IsInvisibilitySet(TO_BUILDINGS)) break; // else FALL THROUGH
2422 case DIAGDIR_SE: DrawGroundSprite(rti->base_sprites.single_y, PALETTE_CRASH); break;
2423 default: break;
2424 }
2425 }
2426 }
2427 int depot_sprite = GetCustomRailSprite(rti, ti->tile, RTSG_DEPOT);
2428 relocation = depot_sprite != 0 ? depot_sprite - SPR_RAIL_DEPOT_SE_1 : rti->GetRailtypeSpriteOffset();
2429
2430 if (HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
2431
2432 DrawRailTileSeq(ti, dts, TO_BUILDINGS, relocation, 0, _drawtile_track_palette);
2433 }
2434 DrawBridgeMiddle(ti);
2435 }
2436
2437 void DrawTrainDepotSprite(int x, int y, int dir, RailType railtype)
2438 {
2439 const DrawTileSprites *dts = &_depot_gfx_table[dir];
2440 const RailtypeInfo *rti = GetRailTypeInfo(railtype);
2441 SpriteID image = rti->UsesOverlay() ? SPR_FLAT_GRASS_TILE : dts->ground.sprite;
2442 uint32 offset = rti->GetRailtypeSpriteOffset();
2443
2444 if (image != SPR_FLAT_GRASS_TILE) image += offset;
2445 PaletteID palette = COMPANY_SPRITE_COLOUR(_local_company);
2446
2447 DrawSprite(image, PAL_NONE, x, y);
2448
2449 if (rti->UsesOverlay()) {
2450 SpriteID ground = GetCustomRailSprite(rti, INVALID_TILE, RTSG_GROUND);
2451
2452 switch (dir) {
2453 case DIAGDIR_SW: DrawSprite(ground + RTO_X, PAL_NONE, x, y); break;
2454 case DIAGDIR_SE: DrawSprite(ground + RTO_Y, PAL_NONE, x, y); break;
2455 default: break;
2456 }
2457 }
2458 int depot_sprite = GetCustomRailSprite(rti, INVALID_TILE, RTSG_DEPOT);
2459 if (depot_sprite != 0) offset = depot_sprite - SPR_RAIL_DEPOT_SE_1;
2460
2461 DrawRailTileSeqInGUI(x, y, dts, offset, 0, palette);
2462 }
2463
2464 static int GetSlopePixelZ_Track(TileIndex tile, uint x, uint y)
2465 {
2466 if (IsPlainRail(tile)) {
2467 int z;
2468 Slope tileh = GetTilePixelSlope(tile, &z);
2469 if (tileh == SLOPE_FLAT) return z;
2470
2471 z += ApplyPixelFoundationToSlope(GetRailFoundation(tileh, GetTrackBits(tile)), &tileh);
2472 return z + GetPartialPixelZ(x & 0xF, y & 0xF, tileh);
2473 } else {
2474 return GetTileMaxPixelZ(tile);
2475 }
2476 }
2477
2478 static Foundation GetFoundation_Track(TileIndex tile, Slope tileh)
2479 {
2480 return IsPlainRail(tile) ? GetRailFoundation(tileh, GetTrackBits(tile)) : FlatteningFoundation(tileh);
2481 }
2482
2483 static void TileLoop_Track(TileIndex tile)
2484 {
2485 RailGroundType old_ground = GetRailGroundType(tile);
2486 RailGroundType new_ground;
2487
2488 if (old_ground == RAIL_GROUND_WATER) {
2489 TileLoop_Water(tile);
2490 return;
2491 }
2492
2493 switch (_settings_game.game_creation.landscape) {
2494 case LT_ARCTIC: {
2495 int z;
2496 Slope slope = GetTileSlope(tile, &z);
2497 bool half = false;
2498
2499 /* for non-flat track, use lower part of track
2500 * in other cases, use the highest part with track */
2501 if (IsPlainRail(tile)) {
2502 TrackBits track = GetTrackBits(tile);
2503 Foundation f = GetRailFoundation(slope, track);
2504
2505 switch (f) {
2506 case FOUNDATION_NONE:
2507 /* no foundation - is the track on the upper side of three corners raised tile? */
2508 if (IsSlopeWithThreeCornersRaised(slope)) z++;
2509 break;
2510
2511 case FOUNDATION_INCLINED_X:
2512 case FOUNDATION_INCLINED_Y:
2513 /* sloped track - is it on a steep slope? */
2514 if (IsSteepSlope(slope)) z++;
2515 break;
2516
2517 case FOUNDATION_STEEP_LOWER:
2518 /* only lower part of steep slope */
2519 z++;
2520 break;
2521
2522 default:
2523 /* if it is a steep slope, then there is a track on higher part */
2524 if (IsSteepSlope(slope)) z++;
2525 z++;
2526 break;
2527 }
2528
2529 half = IsInsideMM(f, FOUNDATION_STEEP_BOTH, FOUNDATION_HALFTILE_N + 1);
2530 } else {
2531 /* is the depot on a non-flat tile? */
2532 if (slope != SLOPE_FLAT) z++;
2533 }
2534
2535 /* 'z' is now the lowest part of the highest track bit -
2536 * for sloped track, it is 'z' of lower part
2537 * for two track bits, it is 'z' of higher track bit
2538 * For non-continuous foundations (and STEEP_BOTH), 'half' is set */
2539 if (z > GetSnowLine()) {
2540 if (half && z - GetSnowLine() == 1) {
2541 /* track on non-continuous foundation, lower part is not under snow */
2542 new_ground = RAIL_GROUND_HALF_SNOW;
2543 } else {
2544 new_ground = RAIL_GROUND_ICE_DESERT;
2545 }
2546 goto set_ground;
2547 }
2548 break;
2549 }
2550
2551 case LT_TROPIC:
2552 if (GetTropicZone(tile) == TROPICZONE_DESERT) {
2553 new_ground = RAIL_GROUND_ICE_DESERT;
2554 goto set_ground;
2555 }
2556 break;
2557 }
2558
2559 new_ground = RAIL_GROUND_GRASS;
2560
2561 if (IsPlainRail(tile) && old_ground != RAIL_GROUND_BARREN) { // wait until bottom is green
2562 /* determine direction of fence */
2563 TrackBits rail = GetTrackBits(tile);
2564
2565 Owner owner = GetTileOwner(tile);
2566 byte fences = 0;
2567
2568 for (DiagDirection d = DIAGDIR_BEGIN; d < DIAGDIR_END; d++) {
2569 static const TrackBits dir_to_trackbits[DIAGDIR_END] = {TRACK_BIT_3WAY_NE, TRACK_BIT_3WAY_SE, TRACK_BIT_3WAY_SW, TRACK_BIT_3WAY_NW};
2570
2571 /* Track bit on this edge => no fence. */
2572 if ((rail & dir_to_trackbits[d]) != TRACK_BIT_NONE) continue;
2573
2574 TileIndex tile2 = tile + TileOffsByDiagDir(d);
2575
2576 /* Show fences if it's a house, industry, object, road, tunnelbridge or not owned by us. */
2577 if (!IsValidTile(tile2) || IsTileType(tile2, MP_HOUSE) || IsTileType(tile2, MP_INDUSTRY) ||
2578 IsTileType(tile2, MP_ROAD) || (IsTileType(tile2, MP_OBJECT) && !IsObjectType(tile2, OBJECT_OWNED_LAND)) || IsTileType(tile2, MP_TUNNELBRIDGE) || !IsTileOwner(tile2, owner)) {
2579 fences |= 1 << d;
2580 }
2581 }
2582
2583 switch (fences) {
2584 case 0: break;
2585 case (1 << DIAGDIR_NE): new_ground = RAIL_GROUND_FENCE_NE; break;
2586 case (1 << DIAGDIR_SE): new_ground = RAIL_GROUND_FENCE_SE; break;
2587 case (1 << DIAGDIR_SW): new_ground = RAIL_GROUND_FENCE_SW; break;
2588 case (1 << DIAGDIR_NW): new_ground = RAIL_GROUND_FENCE_NW; break;
2589 case (1 << DIAGDIR_NE) | (1 << DIAGDIR_SW): new_ground = RAIL_GROUND_FENCE_NESW; break;
2590 case (1 << DIAGDIR_SE) | (1 << DIAGDIR_NW): new_ground = RAIL_GROUND_FENCE_SENW; break;
2591 case (1 << DIAGDIR_NE) | (1 << DIAGDIR_SE): new_ground = RAIL_GROUND_FENCE_VERT1; break;
2592 case (1 << DIAGDIR_NE) | (1 << DIAGDIR_NW): new_ground = RAIL_GROUND_FENCE_HORIZ2; break;
2593 case (1 << DIAGDIR_SE) | (1 << DIAGDIR_SW): new_ground = RAIL_GROUND_FENCE_HORIZ1; break;
2594 case (1 << DIAGDIR_SW) | (1 << DIAGDIR_NW): new_ground = RAIL_GROUND_FENCE_VERT2; break;
2595 default: NOT_REACHED();
2596 }
2597 }
2598
2599 set_ground:
2600 if (old_ground != new_ground) {
2601 SetRailGroundType(tile, new_ground);
2602 MarkTileDirtyByTile(tile);
2603 }
2604 }
2605
2606
2607 static TrackStatus GetTileTrackStatus_Track(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
2608 {
2609 /* Case of half tile slope with water. */
2610 if (mode == TRANSPORT_WATER && IsPlainRail(tile) && GetRailGroundType(tile) == RAIL_GROUND_WATER && IsSlopeWithOneCornerRaised(GetTileSlope(tile))) {
2611 TrackBits tb = GetTrackBits(tile);
2612 switch (tb) {
2613 default: NOT_REACHED();
2614 case TRACK_BIT_UPPER: tb = TRACK_BIT_LOWER; break;
2615 case TRACK_BIT_LOWER: tb = TRACK_BIT_UPPER; break;
2616 case TRACK_BIT_LEFT: tb = TRACK_BIT_RIGHT; break;
2617 case TRACK_BIT_RIGHT: tb = TRACK_BIT_LEFT; break;
2618 }
2619 return CombineTrackStatus(TrackBitsToTrackdirBits(tb), TRACKDIR_BIT_NONE);
2620 }
2621
2622 if (mode != TRANSPORT_RAIL) return 0;
2623
2624 TrackBits trackbits = TRACK_BIT_NONE;
2625 TrackdirBits red_signals = TRACKDIR_BIT_NONE;
2626
2627 switch (GetRailTileType(tile)) {
2628 default: NOT_REACHED();
2629 case RAIL_TILE_NORMAL:
2630 trackbits = GetTrackBits(tile);
2631 break;
2632
2633 case RAIL_TILE_SIGNALS: {
2634 trackbits = GetTrackBits(tile);
2635 byte a = GetPresentSignals(tile);
2636 uint b = GetSignalStates(tile);
2637
2638 b &= a;
2639
2640 /* When signals are not present (in neither direction),
2641 * we pretend them to be green. Otherwise, it depends on
2642 * the signal type. For signals that are only active from
2643 * one side, we set the missing signals explicitly to
2644 * `green'. Otherwise, they implicitly become `red'. */
2645 if (!IsOnewaySignal(tile, TRACK_UPPER) || (a & SignalOnTrack(TRACK_UPPER)) == 0) b |= ~a & SignalOnTrack(TRACK_UPPER);
2646 if (!IsOnewaySignal(tile, TRACK_LOWER) || (a & SignalOnTrack(TRACK_LOWER)) == 0) b |= ~a & SignalOnTrack(TRACK_LOWER);
2647
2648 if ((b & 0x8) == 0) red_signals |= (TRACKDIR_BIT_LEFT_N | TRACKDIR_BIT_X_NE | TRACKDIR_BIT_Y_SE | TRACKDIR_BIT_UPPER_E);
2649 if ((b & 0x4) == 0) red_signals |= (TRACKDIR_BIT_LEFT_S | TRACKDIR_BIT_X_SW | TRACKDIR_BIT_Y_NW | TRACKDIR_BIT_UPPER_W);
2650 if ((b & 0x2) == 0) red_signals |= (TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_LOWER_E);
2651 if ((b & 0x1) == 0) red_signals |= (TRACKDIR_BIT_RIGHT_S | TRACKDIR_BIT_LOWER_W);
2652
2653 break;
2654 }
2655
2656 case RAIL_TILE_DEPOT: {
2657 DiagDirection dir = GetRailDepotDirection(tile);
2658
2659 if (side != INVALID_DIAGDIR && side != dir) break;
2660
2661 trackbits = DiagDirToDiagTrackBits(dir);
2662 break;
2663 }
2664 }
2665
2666 return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), red_signals);
2667 }
2668
2669 static bool ClickTile_Track(TileIndex tile)
2670 {
2671 if (!IsRailDepot(tile)) return false;
2672
2673 ShowDepotWindow(tile, VEH_TRAIN);
2674 return true;
2675 }
2676
2677 static void GetTileDesc_Track(TileIndex tile, TileDesc *td)
2678 {
2679 const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
2680 td->rail_speed = rti->max_speed;
2681 td->owner[0] = GetTileOwner(tile);
2682 SetDParamX(td->dparam, 0, rti->strings.name);
2683 switch (GetRailTileType(tile)) {
2684 case RAIL_TILE_NORMAL:
2685 td->str = STR_LAI_RAIL_DESCRIPTION_TRACK;
2686 break;
2687
2688 case RAIL_TILE_SIGNALS: {
2689 static const StringID signal_type[6][6] = {
2690 {
2691 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_SIGNALS,
2692 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PRESIGNALS,
2693 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_EXITSIGNALS,
2694 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_COMBOSIGNALS,
2695 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PBSSIGNALS,
2696 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_NOENTRYSIGNALS
2697 },
2698 {
2699 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PRESIGNALS,
2700 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRESIGNALS,
2701 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_EXITSIGNALS,
2702 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_COMBOSIGNALS,
2703 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_PBSSIGNALS,
2704 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_NOENTRYSIGNALS
2705 },
2706 {
2707 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_EXITSIGNALS,
2708 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_EXITSIGNALS,
2709 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXITSIGNALS,
2710 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_COMBOSIGNALS,
2711 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_PBSSIGNALS,
2712 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_NOENTRYSIGNALS
2713 },
2714 {
2715 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_COMBOSIGNALS,
2716 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_COMBOSIGNALS,
2717 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_COMBOSIGNALS,
2718 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBOSIGNALS,
2719 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_PBSSIGNALS,
2720 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_NOENTRYSIGNALS
2721 },
2722 {
2723 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PBSSIGNALS,
2724 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_PBSSIGNALS,
2725 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_PBSSIGNALS,
2726 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_PBSSIGNALS,
2727 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PBSSIGNALS,
2728 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PBS_NOENTRYSIGNALS
2729 },
2730 {
2731 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_NOENTRYSIGNALS,
2732 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_NOENTRYSIGNALS,
2733 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_NOENTRYSIGNALS,
2734 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_NOENTRYSIGNALS,
2735 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PBS_NOENTRYSIGNALS,
2736 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NOENTRYSIGNALS
2737 }
2738 };
2739
2740 SignalType primary_signal;
2741 SignalType secondary_signal;
2742 if (HasSignalOnTrack(tile, TRACK_UPPER)) {
2743 primary_signal = GetSignalType(tile, TRACK_UPPER);
2744 secondary_signal = HasSignalOnTrack(tile, TRACK_LOWER) ? GetSignalType(tile, TRACK_LOWER) : primary_signal;
2745 } else {
2746 secondary_signal = primary_signal = GetSignalType(tile, TRACK_LOWER);
2747 }
2748
2749 td->str = signal_type[secondary_signal][primary_signal];
2750 break;
2751 }
2752
2753 case RAIL_TILE_DEPOT:
2754 td->str = STR_LAI_RAIL_DESCRIPTION_TRAIN_DEPOT;
2755 if (_settings_game.vehicle.train_acceleration_model != AM_ORIGINAL) {
2756 if (td->rail_speed > 0) {
2757 td->rail_speed = min(td->rail_speed, 61);
2758 } else {
2759 td->rail_speed = 61;
2760 }
2761 }
2762 td->build_date = Depot::GetByTile(tile)->build_date;
2763 break;
2764
2765 default:
2766 NOT_REACHED();
2767 }
2768 }
2769
2770 static void ChangeTileOwner_Track(TileIndex tile, Owner old_owner, Owner new_owner)
2771 {
2772 if (!IsTileOwner(tile, old_owner)) return;
2773
2774 if (new_owner != INVALID_OWNER) {
2775 /* Update company infrastructure counts. No need to dirty windows here, we'll redraw the whole screen anyway. */
2776 uint num_pieces = 1;
2777 if (IsPlainRail(tile)) {
2778 TrackBits bits = GetTrackBits(tile);
2779 num_pieces = CountBits(bits);
2780 if (TracksOverlap(bits)) num_pieces *= num_pieces;
2781 }
2782 RailType rt = GetRailType(tile);
2783 Company::Get(old_owner)->infrastructure.rail[rt] -= num_pieces;
2784 Company::Get(new_owner)->infrastructure.rail[rt] += num_pieces;
2785
2786 if (HasSignals(tile)) {
2787 uint num_sigs = CountBits(GetPresentSignals(tile));
2788 Company::Get(old_owner)->infrastructure.signal -= num_sigs;
2789 Company::Get(new_owner)->infrastructure.signal += num_sigs;
2790 }
2791
2792 SetTileOwner(tile, new_owner);
2793 } else {
2794 DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
2795 }
2796 }
2797
2798 static const byte _fractcoords_behind[4] = { 0x8F, 0x8, 0x80, 0xF8 };
2799 static const byte _fractcoords_enter[4] = { 0x8A, 0x48, 0x84, 0xA8 };
2800 static const int8 _deltacoord_leaveoffset[8] = {
2801 -1, 0, 1, 0, /* x */
2802 0, 1, 0, -1 /* y */
2803 };
2804
2805
2812 int TicksToLeaveDepot(const Train *v)
2813 {
2814 DiagDirection dir = GetRailDepotDirection(v->tile);
2815 int length = v->CalcNextVehicleOffset();
2816
2817 switch (dir) {
2818 case DIAGDIR_NE: return ((int)(v->x_pos & 0x0F) - ((_fractcoords_enter[dir] & 0x0F) - (length + 1)));
2819 case DIAGDIR_SE: return -((int)(v->y_pos & 0x0F) - ((_fractcoords_enter[dir] >> 4) + (length + 1)));
2820 case DIAGDIR_SW: return -((int)(v->x_pos & 0x0F) - ((_fractcoords_enter[dir] & 0x0F) + (length + 1)));
2821 default:
2822 case DIAGDIR_NW: return ((int)(v->y_pos & 0x0F) - ((_fractcoords_enter[dir] >> 4) - (length + 1)));
2823 }
2824
2825 return 0; // make compilers happy
2826 }
2827
2832 static VehicleEnterTileStatus VehicleEnter_Track(Vehicle *u, TileIndex tile, int x, int y)
2833 {
2834 /* this routine applies only to trains in depot tiles */
2835 if (u->type != VEH_TRAIN || !IsRailDepotTile(tile)) return VETSB_CONTINUE;
2836
2837 Train *v = Train::From(u);
2838
2839 /* depot direction */
2840 DiagDirection dir = GetRailDepotDirection(tile);
2841
2842 /* Calculate the point where the following wagon should be activated. */
2843 int length = v->CalcNextVehicleOffset();
2844
2845 byte fract_coord_leave =
2846 ((_fractcoords_enter[dir] & 0x0F) + // x
2847 (length + 1) * _deltacoord_leaveoffset[dir]) +
2848 (((_fractcoords_enter[dir] >> 4) + // y
2849 ((length + 1) * _deltacoord_leaveoffset[dir + 4])) << 4);
2850
2851 byte fract_coord = (x & 0xF) + ((y & 0xF) << 4);
2852
2853 if (_fractcoords_behind[dir] == fract_coord) {
2854 /* make sure a train is not entering the tile from behind */
2855 return VETSB_CANNOT_ENTER;
2856 } else if (_fractcoords_enter[dir] == fract_coord) {
2857 if (DiagDirToDir(ReverseDiagDir(dir)) == v->direction) {
2858 /* enter the depot */
2859 v->track = TRACK_BIT_DEPOT,
2860 v->vehstatus |= VS_HIDDEN; // hide it
2861 v->direction = ReverseDir(v->direction);
2862 if (v->Next() == NULL) VehicleEnterDepot(v->First());
2863 v->tile = tile;
2864
2865 InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
2866 return VETSB_ENTERED_WORMHOLE;
2867 }
2868 } else if (fract_coord_leave == fract_coord) {
2869 if (DiagDirToDir(dir) == v->direction) {
2870 /* leave the depot? */
2871 if ((v = v->Next()) != NULL) {
2872 v->vehstatus &= ~VS_HIDDEN;
2873 v->track = (DiagDirToAxis(dir) == AXIS_X ? TRACK_BIT_X : TRACK_BIT_Y);
2874 }
2875 }
2876 }
2877
2878 return VETSB_CONTINUE;
2879 }
2880
2892 static CommandCost TestAutoslopeOnRailTile(TileIndex tile, uint flags, int z_old, Slope tileh_old, int z_new, Slope tileh_new, TrackBits rail_bits)
2893 {
2894 if (!_settings_game.construction.build_on_slopes || !AutoslopeEnabled()) return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
2895
2896 /* Is the slope-rail_bits combination valid in general? I.e. is it safe to call GetRailFoundation() ? */
2897 if (CheckRailSlope(tileh_new, rail_bits, TRACK_BIT_NONE, tile).Failed()) return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
2898
2899 /* Get the slopes on top of the foundations */
2900 z_old += ApplyFoundationToSlope(GetRailFoundation(tileh_old, rail_bits), &tileh_old);
2901 z_new += ApplyFoundationToSlope(GetRailFoundation(tileh_new, rail_bits), &tileh_new);
2902
2903 Corner track_corner;
2904 switch (rail_bits) {
2905 case TRACK_BIT_LEFT: track_corner = CORNER_W; break;
2906 case TRACK_BIT_LOWER: track_corner = CORNER_S; break;
2907 case TRACK_BIT_RIGHT: track_corner = CORNER_E; break;
2908 case TRACK_BIT_UPPER: track_corner = CORNER_N; break;
2909
2910 /* Surface slope must not be changed */
2911 default:
2912 if (z_old != z_new || tileh_old != tileh_new) return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
2913 return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
2914 }
2915
2916 /* The height of the track_corner must not be changed. The rest ensures GetRailFoundation() already. */
2917 z_old += GetSlopeZInCorner(RemoveHalftileSlope(tileh_old), track_corner);
2918 z_new += GetSlopeZInCorner(RemoveHalftileSlope(tileh_new), track_corner);
2919 if (z_old != z_new) return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
2920
2921 CommandCost cost = CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
2922 /* Make the ground dirty, if surface slope has changed */
2923 if (tileh_old != tileh_new) {
2924 /* If there is flat water on the lower halftile add the cost for clearing it */
2925 if (GetRailGroundType(tile) == RAIL_GROUND_WATER && IsSlopeWithOneCornerRaised(tileh_old)) cost.AddCost(_price[PR_CLEAR_WATER]);
2926 if ((flags & DC_EXEC) != 0) SetRailGroundType(tile, RAIL_GROUND_BARREN);
2927 }
2928 return cost;
2929 }
2930
2934 static Vehicle *EnsureNoShipProc(Vehicle *v, void *data)
2935 {
2936 return v->type == VEH_SHIP ? v : NULL;
2937 }
2938
2939 static CommandCost TerraformTile_Track(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
2940 {
2941 int z_old;
2942 Slope tileh_old = GetTileSlope(tile, &z_old);
2943 if (IsPlainRail(tile)) {
2944 TrackBits rail_bits = GetTrackBits(tile);
2945 /* Is there flat water on the lower halftile that must be cleared expensively? */
2946 bool was_water = (GetRailGroundType(tile) == RAIL_GROUND_WATER && IsSlopeWithOneCornerRaised(tileh_old));
2947
2948 /* Allow clearing the water only if there is no ship */
2949 if (was_water && HasVehicleOnPos(tile, NULL, &EnsureNoShipProc)) return_cmd_error(STR_ERROR_SHIP_IN_THE_WAY);
2950
2951 /* First test autoslope. However if it succeeds we still have to test the rest, because non-autoslope terraforming is cheaper. */
2952 CommandCost autoslope_result = TestAutoslopeOnRailTile(tile, flags, z_old, tileh_old, z_new, tileh_new, rail_bits);
2953
2954 /* When there is only a single horizontal/vertical track, one corner can be terraformed. */
2955 Corner allowed_corner;
2956 switch (rail_bits) {
2957 case TRACK_BIT_RIGHT: allowed_corner = CORNER_W; break;
2958 case TRACK_BIT_UPPER: allowed_corner = CORNER_S; break;
2959 case TRACK_BIT_LEFT: allowed_corner = CORNER_E; break;
2960 case TRACK_BIT_LOWER: allowed_corner = CORNER_N; break;
2961 default: return autoslope_result;
2962 }
2963
2964 Foundation f_old = GetRailFoundation(tileh_old, rail_bits);
2965
2966 /* Do not allow terraforming if allowed_corner is part of anti-zig-zag foundations */
2967 if (tileh_old != SLOPE_NS && tileh_old != SLOPE_EW && IsSpecialRailFoundation(f_old)) return autoslope_result;
2968
2969 /* Everything is valid, which only changes allowed_corner */
2970 for (Corner corner = (Corner)0; corner < CORNER_END; corner = (Corner)(corner + 1)) {
2971 if (allowed_corner == corner) continue;
2972 if (z_old + GetSlopeZInCorner(tileh_old, corner) != z_new + GetSlopeZInCorner(tileh_new, corner)) return autoslope_result;
2973 }
2974
2975 /* Make the ground dirty */
2976 if ((flags & DC_EXEC) != 0) SetRailGroundType(tile, RAIL_GROUND_BARREN);
2977
2978 /* allow terraforming */
2979 return CommandCost(EXPENSES_CONSTRUCTION, was_water ? _price[PR_CLEAR_WATER] : (Money)0);
2980 } else if (_settings_game.construction.build_on_slopes && AutoslopeEnabled() &&
2981 AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, GetRailDepotDirection(tile))) {
2982 return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
2983 }
2984 return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
2985 }
2986
2987
2988 extern const TileTypeProcs _tile_type_rail_procs = {
2989 DrawTile_Track, // draw_tile_proc
2990 GetSlopePixelZ_Track, // get_slope_z_proc
2991 ClearTile_Track, // clear_tile_proc
2992 NULL, // add_accepted_cargo_proc
2993 GetTileDesc_Track, // get_tile_desc_proc
2994 GetTileTrackStatus_Track, // get_tile_track_status_proc
2995 ClickTile_Track, // click_tile_proc
2996 NULL, // animate_tile_proc
2997 TileLoop_Track, // tile_loop_proc
2998 ChangeTileOwner_Track, // change_tile_owner_proc
2999 NULL, // add_produced_cargo_proc
3000 VehicleEnter_Track, // vehicle_enter_tile_proc
3001 GetFoundation_Track, // get_foundation_proc
3002 TerraformTile_Track, // terraform_tile_proc
3003 };