37 #include "table/strings.h"
67 memset(_railtypes, 0,
sizeof(_railtypes));
74 if (cursors_base != 0) {
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},
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},
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;
119 ResolveRailTypeGUISprites(rti);
131 if (rti->
label == 0) {
160 static const byte _track_sloped_sprites[14] = {
230 if (current == future) {
240 return_cmd_error((flags & DC_NO_RAIL_OVERLAP) ? STR_ERROR_IMPOSSIBLE_TRACK_COMBINATION : STR_ERROR_MUST_REMOVE_SIGNALS_FIRST);
321 if ((~_valid_tracks_without_foundation[tileh] & bits) == 0)
return FOUNDATION_NONE;
323 bool valid_on_leveled = ((~_valid_tracks_on_leveled_foundation[tileh] & bits) == 0);
383 if (!
IsSteepSlope(tileh) && ((~_valid_tracks_on_leveled_foundation[tileh] & (rail_bits | existing)) != 0))
return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
399 static inline bool ValParamTrackOrientation(
Track track)
415 RailType railtype = Extract<RailType, 0, 4>(p1);
416 Track track = Extract<Track, 0, 3>(p2);
427 if (ret.
Failed())
return ret;
435 if (ret.
Failed())
return ret;
438 if (ret.
Failed())
return ret;
447 if (ret.
Failed())
return ret;
476 if (ret.
Failed())
return ret;
504 cost.AddCost(2 * _price[PR_BUILD_ROAD]);
535 if (ret.
Failed())
return ret;
539 if (ret.
Failed())
return ret;
543 cost.AddCost(-_price[PR_CLEAR_WATER]);
544 cost.AddCost(_price[PR_CLEAR_ROUGH]);
578 Track track = Extract<Track, 0, 3>(p2);
580 bool crossing =
false;
582 if (!ValParamTrackOrientation(track))
return CMD_ERROR;
599 if (ret.
Failed())
return ret;
604 if (ret.
Failed())
return ret;
630 if (ret.
Failed())
return ret;
634 if (ret.
Failed())
return ret;
637 if ((present & trackbit) == 0)
return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
723 bool flooded =
false;
732 TrackBits to_remove = lower_track & rail_bits;
733 if (to_remove != 0) {
737 if (!flooded)
return flooded;
738 rail_bits = rail_bits & ~to_remove;
739 if (rail_bits == 0) {
765 { -1, 0 }, { 0, 1 }, { -1, 0 }, { 0, 1 }, { 1, 0 }, { 0, 1 },
768 { 1, 0 }, { 0, -1 }, { 0, -1 }, { 1, 0 }, { 0, -1 }, { -1, 0 },
776 int x =
TileX(start);
777 int y =
TileY(start);
788 int trdx = _trackdelta[*trackdir].
x;
789 int trdy = _trackdelta[*trackdir].
y;
792 trdx += _trackdelta[*trackdir ^ 1].
x;
793 trdy += _trackdelta[*trackdir ^ 1].
y;
797 while ((trdx <= 0 && dx > 0) ||
798 (trdx >= 0 && dx < 0) ||
799 (trdy <= 0 && dy > 0) ||
800 (trdy >= 0 && dy < 0)) {
801 if (!
HasBit(*trackdir, 3)) {
813 trdx = _trackdelta[*trackdir].
x;
814 trdy = _trackdelta[*trackdir].
y;
837 Track track = Extract<Track, 4, 3>(p2);
838 bool remove =
HasBit(p2, 7);
839 RailType railtype = Extract<RailType, 0, 4>(p2);
846 CommandCost ret = ValidateAutoDrag(&trackdir, tile, end_tile);
847 if (ret.
Failed())
return ret;
849 bool had_success =
false;
856 if (last_error.
GetErrorMessage() != STR_ERROR_ALREADY_BUILT && !
remove) {
857 if (
HasBit(p2, 8))
return last_error;
862 if (last_error.
GetErrorMessage() == STR_ERROR_OWNED_BY &&
remove)
break;
868 if (tile == end_tile)
break;
876 if (had_success)
return total_cost;
933 RailType railtype = Extract<RailType, 0, 4>(p1);
955 if (cost.
Failed())
return cost;
976 cost.
AddCost(_price[PR_BUILD_DEPOT_TRAIN]);
1004 Track track = Extract<Track, 0, 3>(p1);
1005 bool ctrl_pressed =
HasBit(p1, 3);
1007 SignalType sigtype = Extract<SignalType, 5, 3>(p1);
1008 bool convert_signal =
HasBit(p1, 8);
1009 SignalType cycle_start = Extract<SignalType, 9, 3>(p1);
1010 SignalType cycle_stop = Extract<SignalType, 12, 3>(p1);
1011 uint num_dir_cycle =
GB(p1, 15, 2);
1013 if (sigtype > SIGTYPE_LAST)
return CMD_ERROR;
1014 if (cycle_start > cycle_stop || cycle_stop > SIGTYPE_LAST)
return CMD_ERROR;
1025 if (ret.
Failed())
return ret;
1041 if (p2 != 0 && sigvar != GetSignalVariant(tile, track)) {
1045 }
else if (convert_signal) {
1047 if (ctrl_pressed || GetSignalVariant(tile, track) != sigvar) {
1076 SetSignalType(tile, track, sigtype);
1077 SetSignalVariant(tile, track, sigvar);
1087 SetSignalType(tile, track, sigtype);
1088 SetSignalVariant(tile, track, sigvar);
1089 while (num_dir_cycle-- > 0) CycleSignalSide(tile, track);
1091 if (convert_signal) {
1097 sigtype = GetSignalType(tile, track);
1100 SetSignalType(tile, track, sigtype);
1101 SetSignalVariant(tile, track, sigvar);
1107 }
else if (ctrl_pressed) {
1109 sigtype = (
SignalType)(GetSignalType(tile, track) + 1);
1111 if (sigtype < cycle_start || sigtype > cycle_stop) sigtype = cycle_start;
1113 SetSignalType(tile, track, sigtype);
1119 CycleSignalSide(tile, track);
1121 sigtype = GetSignalType(tile, track);
1128 SetSignalVariant(tile, track, sigvar);
1129 SetSignalType(tile, track, sigtype);
1136 if (IsPbsSignal(sigtype)) {
1156 static bool CheckSignalAutoFill(
TileIndex &tile,
Trackdir &trackdir,
int &signal_ctr,
bool remove)
1207 default:
return false;
1233 Track track = Extract<Track, 0, 3>(p2);
1234 bool mode =
HasBit(p2, 3);
1235 bool semaphores =
HasBit(p2, 4);
1236 bool remove =
HasBit(p2, 5);
1237 bool autofill =
HasBit(p2, 6);
1238 bool minimise_gaps =
HasBit(p2, 10);
1239 byte signal_density =
GB(p2, 24, 8);
1243 if (signal_density == 0 || signal_density > 20)
return CMD_ERROR;
1249 signal_density *= 2;
1252 CommandCost ret = ValidateAutoDrag(&trackdir, tile, end_tile);
1253 if (ret.
Failed())
return ret;
1256 Trackdir start_trackdir = trackdir;
1262 if (sigtype > SIGTYPE_LAST)
return CMD_ERROR;
1268 assert(signals != 0);
1271 semaphores = GetSignalVariant(tile, track) !=
SIG_ELECTRIC;
1273 sigtype = GetSignalType(tile, track);
1280 byte signal_dir = 0;
1297 int last_used_ctr = INT_MIN;
1298 int last_suitable_ctr = 0;
1302 bool had_success =
false;
1305 if (
remove || minimise_gaps || signal_ctr % signal_density == 0) {
1308 SB(p1, 4, 1, semaphores);
1309 SB(p1, 5, 3, sigtype);
1310 if (!
remove && signal_ctr == 0)
SetBit(p1, 17);
1318 bool test_only = !
remove && minimise_gaps && signal_ctr < (last_used_ctr + signal_density);
1321 if (ret.Succeeded()) {
1323 last_suitable_ctr = signal_ctr;
1324 last_suitable_tile = tile;
1325 last_suitable_trackdir = trackdir;
1326 }
else if (!test_only && last_suitable_tile !=
INVALID_TILE) {
1342 if (ret.Succeeded()) {
1345 last_used_ctr = last_suitable_ctr;
1349 if (ret.GetErrorMessage() != STR_ERROR_THERE_IS_NO_RAILROAD_TRACK ||
1358 if (!CheckSignalAutoFill(tile, trackdir, signal_ctr,
remove))
break;
1361 if (tile == start_tile && trackdir == start_trackdir)
break;
1363 if (tile == end_tile)
break;
1377 return had_success ? total_cost : last_error;
1417 Track track = Extract<Track, 0, 3>(p1);
1429 if (ret.
Failed())
return ret;
1437 }
else if (IsPbsSignal(GetSignalType(tile, track))) {
1520 RailType totype = Extract<RailType, 0, 4>(p2);
1523 bool diagonal =
HasBit(p2, 4);
1547 error.
MakeError(STR_ERROR_CROSSING_DISALLOWED);
1590 *vehicles_affected.
Append() = v;
1631 if (flags & DC_EXEC) {
1648 if (endtile < tile) {
1672 *vehicles_affected.
Append() = v;
1714 for (uint i = 0; i < vehicles_affected.
Length(); ++i) {
1721 for (
Train **v = affected_trains.
Begin(); v != affected_trains.
End(); v++) {
1727 return (cost.
GetCost() == 0) ? error : cost;
1734 if (ret.
Failed())
return ret;
1738 if (ret.
Failed())
return ret;
1754 delete Depot::GetByTile(tile);
1755 DoClearSquare(tile);
1791 if (ret.
Failed())
return ret;
1799 if (ret.
Failed())
return ret;
1802 if (flags & DC_EXEC) DoClearSquare(tile);
1803 cost.AddCost(_price[PR_CLEAR_WATER]);
1810 return RemoveTrainDepot(tile, flags);
1830 return GetSlopePixelZ(x, y);
1837 case 0: side =
false;
break;
1838 case 2: side =
true;
break;
1841 static const Point SignalPositions[2][12] = {
1844 { 8, 5}, {14, 1}, { 1, 14}, { 9, 11}, { 1, 0}, { 3, 10},
1846 {11, 4}, {14, 14}, {11, 3}, { 4, 13}, { 3, 4}, {11, 13}
1849 {14, 1}, {12, 10}, { 4, 6}, { 1, 14}, {10, 4}, { 0, 1},
1851 {14, 14}, { 5, 12}, {11, 13}, { 4, 3}, {13, 4}, { 3, 11}
1858 SignalType type = GetSignalType(tile, track);
1867 sprite += type * 16 + variant * 64 + image * 2 + condition + (type > SIGTYPE_LAST_NOPBS ? 64 : 0);
1873 static uint32 _drawtile_track_palette;
1881 ti->
x, ti->
y + 1, 16, 1, 4, ti->
z);
1894 DrawTrackFence_NW(ti, base_image);
1895 DrawTrackFence_SE(ti, base_image);
1903 ti->
x + 1, ti->
y, 1, 16, 4, ti->
z);
1916 DrawTrackFence_NE(ti, base_image);
1917 DrawTrackFence_SW(ti, base_image);
1966 if (base_image == 0) base_image = SPR_TRACK_FENCE_FLAT_X;
1968 switch (GetRailGroundType(ti->
tile)) {
1988 switch (track_corner) {
1993 default: NOT_REACHED();
2002 static const int INF = 1000;
2003 static const SubSprite _halftile_sub_sprite[4] = {
2004 { -INF , -INF , 32 - 33, INF },
2005 { -INF , 0 + 7, INF , INF },
2006 { -31 + 33, -INF , INF , INF },
2007 { -INF , -INF , INF , 30 - 23 }
2019 Corner halftile_corner = CORNER_INVALID;
2036 DrawShoreTile(ti->
tileh);
2047 default: image = SPR_FLAT_GRASS_TILE;
break;
2085 DrawTrackSprite(ground +
RTO_S, PAL_NONE, ti,
SLOPE_S);
break;
2087 DrawTrackSprite(ground +
RTO_W, PAL_NONE, ti,
SLOPE_W);
break;
2137 default: image = SPR_FLAT_GRASS_TILE;
break;
2142 DrawGroundSprite(image, PAL_NONE, &(_halftile_sub_sprite[halftile_corner]));
2148 default: NOT_REACHED();
2149 case TRACK_BIT_UPPER: offset =
RTO_N;
break;
2150 case TRACK_BIT_LOWER: offset =
RTO_S;
break;
2151 case TRACK_BIT_RIGHT: offset =
RTO_E;
break;
2155 DrawTrackSprite(ground + offset, PAL_NONE, ti, fake_slope);
2157 DrawTrackSprite(overlay + offset,
PALETTE_CRASH, ti, fake_slope);
2171 if (rti->UsesOverlay()) {
2172 DrawTrackBitsOverlay(ti, track, rti);
2178 Corner halftile_corner = CORNER_INVALID;
2194 bool junction =
false;
2201 DrawShoreTile(ti->
tileh);
2204 image = SPR_FLAT_WATER_TILE;
2210 default: image = SPR_FLAT_GRASS_TILE;
break;
2221 (image++, track == TRACK_BIT_X) ||
2223 (image++, track == TRACK_BIT_LOWER) ||
2231 (junction =
true,
false) ||
2244 DrawShoreTile(ti->
tileh);
2246 sub = &(_halftile_sub_sprite[track_corner]);
2269 if (pbs & TRACK_BIT_X) {
2276 if (pbs & TRACK_BIT_Y) {
2305 static const byte _corner_to_track_sprite[] = {3, 1, 2, 0};
2313 #define MAYBE_DRAW_SIGNAL(x, y, z, t) if (IsSignalPresent(tile, x)) DrawSingleSignal(tile, rti, t, GetSingleSignalState(tile, x), y, z)
2315 if (!(rails & TRACK_BIT_Y)) {
2316 if (!(rails & TRACK_BIT_X)) {
2318 MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTH, 0,
TRACK_LEFT);
2319 MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTH, 1,
TRACK_LEFT);
2321 if (rails & TRACK_BIT_RIGHT) {
2322 MAYBE_DRAW_SIGNAL(0, SIGNAL_TO_NORTH, 2,
TRACK_RIGHT);
2323 MAYBE_DRAW_SIGNAL(1, SIGNAL_TO_SOUTH, 3,
TRACK_RIGHT);
2325 if (rails & TRACK_BIT_UPPER) {
2326 MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_WEST, 4,
TRACK_UPPER);
2327 MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_EAST, 5,
TRACK_UPPER);
2329 if (rails & TRACK_BIT_LOWER) {
2330 MAYBE_DRAW_SIGNAL(1, SIGNAL_TO_WEST, 6,
TRACK_LOWER);
2331 MAYBE_DRAW_SIGNAL(0, SIGNAL_TO_EAST, 7,
TRACK_LOWER);
2334 MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTHWEST, 8,
TRACK_X);
2335 MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTHEAST, 9,
TRACK_X);
2338 MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTHEAST, 10,
TRACK_Y);
2339 MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTHWEST, 11,
TRACK_Y);
2343 static void DrawTile_Track(
TileInfo *ti)
2375 if (rti->UsesOverlay()) {
2376 image = SPR_FLAT_GRASS_TILE;
2385 if (image != SPR_FLAT_GRASS_TILE) {
2388 image = SPR_FLAT_SNOW_DESERT_TILE;
2394 if (rti->UsesOverlay()) {
2438 void DrawTrainDepotSprite(
int x,
int y,
int dir,
RailType railtype)
2445 if (image != SPR_FLAT_GRASS_TILE) image += offset;
2450 if (rti->UsesOverlay()) {
2460 if (depot_sprite != 0) offset = depot_sprite - SPR_RAIL_DEPOT_SE_1;
2465 static int GetSlopePixelZ_Track(
TileIndex tile, uint x, uint y)
2484 static void TileLoop_Track(
TileIndex tile)
2596 default: NOT_REACHED();
2601 if (old_ground != new_ground) {
2602 SetRailGroundType(tile, new_ground);
2614 default: NOT_REACHED();
2629 default: NOT_REACHED();
2670 static bool ClickTile_Track(
TileIndex tile)
2686 td->
str = STR_LAI_RAIL_DESCRIPTION_TRACK;
2690 static const StringID signal_type[6][6] = {
2692 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_SIGNALS,
2693 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PRESIGNALS,
2694 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_EXITSIGNALS,
2695 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_COMBOSIGNALS,
2696 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PBSSIGNALS,
2697 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_NOENTRYSIGNALS
2700 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PRESIGNALS,
2701 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRESIGNALS,
2702 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_EXITSIGNALS,
2703 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_COMBOSIGNALS,
2704 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_PBSSIGNALS,
2705 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_NOENTRYSIGNALS
2708 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_EXITSIGNALS,
2709 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_EXITSIGNALS,
2710 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXITSIGNALS,
2711 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_COMBOSIGNALS,
2712 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_PBSSIGNALS,
2713 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_NOENTRYSIGNALS
2716 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_COMBOSIGNALS,
2717 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_COMBOSIGNALS,
2718 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_COMBOSIGNALS,
2719 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBOSIGNALS,
2720 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_PBSSIGNALS,
2721 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_NOENTRYSIGNALS
2724 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PBSSIGNALS,
2725 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_PBSSIGNALS,
2726 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_PBSSIGNALS,
2727 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_PBSSIGNALS,
2728 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PBSSIGNALS,
2729 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PBS_NOENTRYSIGNALS
2732 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_NOENTRYSIGNALS,
2733 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_NOENTRYSIGNALS,
2734 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_NOENTRYSIGNALS,
2735 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_NOENTRYSIGNALS,
2736 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PBS_NOENTRYSIGNALS,
2737 STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NOENTRYSIGNALS
2744 primary_signal = GetSignalType(tile,
TRACK_UPPER);
2747 secondary_signal = primary_signal = GetSignalType(tile,
TRACK_LOWER);
2750 td->
str = signal_type[secondary_signal][primary_signal];
2755 td->
str = STR_LAI_RAIL_DESCRIPTION_TRAIN_DEPOT;
2777 uint num_pieces = 1;
2784 Company::Get(old_owner)->infrastructure.rail[rt] -= num_pieces;
2785 Company::Get(new_owner)->infrastructure.rail[rt] += num_pieces;
2789 Company::Get(old_owner)->infrastructure.signal -= num_sigs;
2790 Company::Get(new_owner)->infrastructure.signal += num_sigs;
2799 static const byte _fractcoords_behind[4] = { 0x8F, 0x8, 0x80, 0xF8 };
2800 static const byte _fractcoords_enter[4] = { 0x8A, 0x48, 0x84, 0xA8 };
2801 static const int8 _deltacoord_leaveoffset[8] = {
2819 case DIAGDIR_NE:
return ((
int)(v->
x_pos & 0x0F) - ((_fractcoords_enter[dir] & 0x0F) - (length + 1)));
2820 case DIAGDIR_SE:
return -((int)(v->
y_pos & 0x0F) - ((_fractcoords_enter[dir] >> 4) + (length + 1)));
2821 case DIAGDIR_SW:
return -((int)(v->
x_pos & 0x0F) - ((_fractcoords_enter[dir] & 0x0F) + (length + 1)));
2823 case DIAGDIR_NW:
return ((
int)(v->
y_pos & 0x0F) - ((_fractcoords_enter[dir] >> 4) - (length + 1)));
2846 byte fract_coord_leave =
2847 ((_fractcoords_enter[dir] & 0x0F) +
2848 (length + 1) * _deltacoord_leaveoffset[dir]) +
2849 (((_fractcoords_enter[dir] >> 4) +
2850 ((length + 1) * _deltacoord_leaveoffset[dir + 4])) << 4);
2852 byte fract_coord = (x & 0xF) + ((y & 0xF) << 4);
2854 if (_fractcoords_behind[dir] == fract_coord) {
2857 }
else if (_fractcoords_enter[dir] == fract_coord) {
2869 }
else if (fract_coord_leave == fract_coord) {
2872 if ((v = v->
Next()) != NULL) {
2905 switch (rail_bits) {
2906 case TRACK_BIT_LEFT: track_corner = CORNER_W;
break;
2907 case TRACK_BIT_LOWER: track_corner = CORNER_S;
break;
2908 case TRACK_BIT_RIGHT: track_corner = CORNER_E;
break;
2909 case TRACK_BIT_UPPER: track_corner = CORNER_N;
break;
2913 if (z_old != z_new || tileh_old != tileh_new)
return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
2920 if (z_old != z_new)
return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
2924 if (tileh_old != tileh_new) {
2957 switch (rail_bits) {
2958 case TRACK_BIT_RIGHT: allowed_corner = CORNER_W;
break;
2959 case TRACK_BIT_UPPER: allowed_corner = CORNER_S;
break;
2960 case TRACK_BIT_LEFT: allowed_corner = CORNER_E;
break;
2961 case TRACK_BIT_LOWER: allowed_corner = CORNER_N;
break;
2962 default:
return autoslope_result;
2971 for (
Corner corner = (
Corner)0; corner < CORNER_END; corner = (
Corner)(corner + 1)) {
2972 if (allowed_corner == corner)
continue;
2991 GetSlopePixelZ_Track,
2995 GetTileTrackStatus_Track,
2999 ChangeTileOwner_Track,
3002 GetFoundation_Track,
3003 TerraformTile_Track,