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;
534 if (ret.
Failed())
return ret;
538 if (ret.
Failed())
return ret;
542 cost.AddCost(-_price[PR_CLEAR_WATER]);
543 cost.AddCost(_price[PR_CLEAR_ROUGH]);
577 Track track = Extract<Track, 0, 3>(p2);
579 bool crossing =
false;
581 if (!ValParamTrackOrientation(track))
return CMD_ERROR;
598 if (ret.
Failed())
return ret;
603 if (ret.
Failed())
return ret;
629 if (ret.
Failed())
return ret;
633 if (ret.
Failed())
return ret;
636 if ((present & trackbit) == 0)
return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
722 bool flooded =
false;
731 TrackBits to_remove = lower_track & rail_bits;
732 if (to_remove != 0) {
736 if (!flooded)
return flooded;
737 rail_bits = rail_bits & ~to_remove;
738 if (rail_bits == 0) {
764 { -1, 0 }, { 0, 1 }, { -1, 0 }, { 0, 1 }, { 1, 0 }, { 0, 1 },
767 { 1, 0 }, { 0, -1 }, { 0, -1 }, { 1, 0 }, { 0, -1 }, { -1, 0 },
775 int x =
TileX(start);
776 int y =
TileY(start);
787 int trdx = _trackdelta[*trackdir].
x;
788 int trdy = _trackdelta[*trackdir].
y;
791 trdx += _trackdelta[*trackdir ^ 1].
x;
792 trdy += _trackdelta[*trackdir ^ 1].
y;
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)) {
812 trdx = _trackdelta[*trackdir].
x;
813 trdy = _trackdelta[*trackdir].
y;
836 Track track = Extract<Track, 4, 3>(p2);
837 bool remove =
HasBit(p2, 7);
838 RailType railtype = Extract<RailType, 0, 4>(p2);
845 CommandCost ret = ValidateAutoDrag(&trackdir, tile, end_tile);
846 if (ret.
Failed())
return ret;
848 bool had_success =
false;
855 if (last_error.
GetErrorMessage() != STR_ERROR_ALREADY_BUILT && !
remove) {
856 if (
HasBit(p2, 8))
return last_error;
861 if (last_error.
GetErrorMessage() == STR_ERROR_OWNED_BY &&
remove)
break;
867 if (tile == end_tile)
break;
875 if (had_success)
return total_cost;
932 RailType railtype = Extract<RailType, 0, 4>(p1);
954 if (cost.
Failed())
return cost;
975 cost.
AddCost(_price[PR_BUILD_DEPOT_TRAIN]);
1003 Track track = Extract<Track, 0, 3>(p1);
1004 bool ctrl_pressed =
HasBit(p1, 3);
1006 SignalType sigtype = Extract<SignalType, 5, 3>(p1);
1007 bool convert_signal =
HasBit(p1, 8);
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);
1012 if (sigtype > SIGTYPE_LAST)
return CMD_ERROR;
1013 if (cycle_start > cycle_stop || cycle_stop > SIGTYPE_LAST)
return CMD_ERROR;
1024 if (ret.
Failed())
return ret;
1040 if (p2 != 0 && sigvar != GetSignalVariant(tile, track)) {
1044 }
else if (convert_signal) {
1046 if (ctrl_pressed || GetSignalVariant(tile, track) != sigvar) {
1075 SetSignalType(tile, track, sigtype);
1076 SetSignalVariant(tile, track, sigvar);
1086 SetSignalType(tile, track, sigtype);
1087 SetSignalVariant(tile, track, sigvar);
1088 while (num_dir_cycle-- > 0) CycleSignalSide(tile, track);
1090 if (convert_signal) {
1096 sigtype = GetSignalType(tile, track);
1099 SetSignalType(tile, track, sigtype);
1100 SetSignalVariant(tile, track, sigvar);
1106 }
else if (ctrl_pressed) {
1108 sigtype = (
SignalType)(GetSignalType(tile, track) + 1);
1110 if (sigtype < cycle_start || sigtype > cycle_stop) sigtype = cycle_start;
1112 SetSignalType(tile, track, sigtype);
1118 CycleSignalSide(tile, track);
1120 sigtype = GetSignalType(tile, track);
1127 SetSignalVariant(tile, track, sigvar);
1128 SetSignalType(tile, track, sigtype);
1135 if (IsPbsSignal(sigtype)) {
1155 static bool CheckSignalAutoFill(
TileIndex &tile,
Trackdir &trackdir,
int &signal_ctr,
bool remove)
1206 default:
return false;
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);
1242 if (signal_density == 0 || signal_density > 20)
return CMD_ERROR;
1248 signal_density *= 2;
1251 CommandCost ret = ValidateAutoDrag(&trackdir, tile, end_tile);
1252 if (ret.
Failed())
return ret;
1255 Trackdir start_trackdir = trackdir;
1261 if (sigtype > SIGTYPE_LAST)
return CMD_ERROR;
1267 assert(signals != 0);
1270 semaphores = GetSignalVariant(tile, track) !=
SIG_ELECTRIC;
1272 sigtype = GetSignalType(tile, track);
1279 byte signal_dir = 0;
1296 int last_used_ctr = INT_MIN;
1297 int last_suitable_ctr = 0;
1301 bool had_success =
false;
1304 if (
remove || minimise_gaps || signal_ctr % signal_density == 0) {
1307 SB(p1, 4, 1, semaphores);
1308 SB(p1, 5, 3, sigtype);
1309 if (!
remove && signal_ctr == 0)
SetBit(p1, 17);
1317 bool test_only = !
remove && minimise_gaps && signal_ctr < (last_used_ctr + signal_density);
1320 if (ret.Succeeded()) {
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) {
1341 if (ret.Succeeded()) {
1344 last_used_ctr = last_suitable_ctr;
1348 if (ret.GetErrorMessage() != STR_ERROR_THERE_IS_NO_RAILROAD_TRACK ||
1357 if (!CheckSignalAutoFill(tile, trackdir, signal_ctr,
remove))
break;
1360 if (tile == start_tile && trackdir == start_trackdir)
break;
1362 if (tile == end_tile)
break;
1376 return had_success ? total_cost : last_error;
1416 Track track = Extract<Track, 0, 3>(p1);
1428 if (ret.
Failed())
return ret;
1436 }
else if (IsPbsSignal(GetSignalType(tile, track))) {
1519 RailType totype = Extract<RailType, 0, 4>(p2);
1522 bool diagonal =
HasBit(p2, 4);
1546 error.
MakeError(STR_ERROR_CROSSING_DISALLOWED);
1589 *vehicles_affected.
Append() = v;
1630 if (flags & DC_EXEC) {
1647 if (endtile < tile) {
1671 *vehicles_affected.
Append() = v;
1713 for (uint i = 0; i < vehicles_affected.
Length(); ++i) {
1720 for (
Train **v = affected_trains.
Begin(); v != affected_trains.
End(); v++) {
1726 return (cost.
GetCost() == 0) ? error : cost;
1733 if (ret.
Failed())
return ret;
1737 if (ret.
Failed())
return ret;
1753 delete Depot::GetByTile(tile);
1754 DoClearSquare(tile);
1790 if (ret.
Failed())
return ret;
1798 if (ret.
Failed())
return ret;
1801 if (flags & DC_EXEC) DoClearSquare(tile);
1802 cost.AddCost(_price[PR_CLEAR_WATER]);
1809 return RemoveTrainDepot(tile, flags);
1829 return GetSlopePixelZ(x, y);
1836 case 0: side =
false;
break;
1837 case 2: side =
true;
break;
1840 static const Point SignalPositions[2][12] = {
1843 { 8, 5}, {14, 1}, { 1, 14}, { 9, 11}, { 1, 0}, { 3, 10},
1845 {11, 4}, {14, 14}, {11, 3}, { 4, 13}, { 3, 4}, {11, 13}
1848 {14, 1}, {12, 10}, { 4, 6}, { 1, 14}, {10, 4}, { 0, 1},
1850 {14, 14}, { 5, 12}, {11, 13}, { 4, 3}, {13, 4}, { 3, 11}
1857 SignalType type = GetSignalType(tile, track);
1866 sprite += type * 16 + variant * 64 + image * 2 + condition + (type > SIGTYPE_LAST_NOPBS ? 64 : 0);
1872 static uint32 _drawtile_track_palette;
1880 ti->
x, ti->
y + 1, 16, 1, 4, ti->
z);
1893 DrawTrackFence_NW(ti, base_image);
1894 DrawTrackFence_SE(ti, base_image);
1902 ti->
x + 1, ti->
y, 1, 16, 4, ti->
z);
1915 DrawTrackFence_NE(ti, base_image);
1916 DrawTrackFence_SW(ti, base_image);
1965 if (base_image == 0) base_image = SPR_TRACK_FENCE_FLAT_X;
1967 switch (GetRailGroundType(ti->
tile)) {
1987 switch (track_corner) {
1992 default: NOT_REACHED();
2001 static const int INF = 1000;
2002 static const SubSprite _halftile_sub_sprite[4] = {
2003 { -INF , -INF , 32 - 33, INF },
2004 { -INF , 0 + 7, INF , INF },
2005 { -31 + 33, -INF , INF , INF },
2006 { -INF , -INF , INF , 30 - 23 }
2018 Corner halftile_corner = CORNER_INVALID;
2035 DrawShoreTile(ti->
tileh);
2046 default: image = SPR_FLAT_GRASS_TILE;
break;
2084 DrawTrackSprite(ground +
RTO_S, PAL_NONE, ti,
SLOPE_S);
break;
2086 DrawTrackSprite(ground +
RTO_W, PAL_NONE, ti,
SLOPE_W);
break;
2136 default: image = SPR_FLAT_GRASS_TILE;
break;
2141 DrawGroundSprite(image, PAL_NONE, &(_halftile_sub_sprite[halftile_corner]));
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;
2154 DrawTrackSprite(ground + offset, PAL_NONE, ti, fake_slope);
2156 DrawTrackSprite(overlay + offset,
PALETTE_CRASH, ti, fake_slope);
2170 if (rti->UsesOverlay()) {
2171 DrawTrackBitsOverlay(ti, track, rti);
2177 Corner halftile_corner = CORNER_INVALID;
2193 bool junction =
false;
2200 DrawShoreTile(ti->
tileh);
2203 image = SPR_FLAT_WATER_TILE;
2209 default: image = SPR_FLAT_GRASS_TILE;
break;
2220 (image++, track == TRACK_BIT_X) ||
2222 (image++, track == TRACK_BIT_LOWER) ||
2230 (junction =
true,
false) ||
2243 DrawShoreTile(ti->
tileh);
2245 sub = &(_halftile_sub_sprite[track_corner]);
2268 if (pbs & TRACK_BIT_X) {
2275 if (pbs & TRACK_BIT_Y) {
2304 static const byte _corner_to_track_sprite[] = {3, 1, 2, 0};
2312 #define MAYBE_DRAW_SIGNAL(x, y, z, t) if (IsSignalPresent(tile, x)) DrawSingleSignal(tile, rti, t, GetSingleSignalState(tile, x), y, z)
2314 if (!(rails & TRACK_BIT_Y)) {
2315 if (!(rails & TRACK_BIT_X)) {
2317 MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTH, 0,
TRACK_LEFT);
2318 MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTH, 1,
TRACK_LEFT);
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);
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);
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);
2333 MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTHWEST, 8,
TRACK_X);
2334 MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTHEAST, 9,
TRACK_X);
2337 MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTHEAST, 10,
TRACK_Y);
2338 MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTHWEST, 11,
TRACK_Y);
2342 static void DrawTile_Track(
TileInfo *ti)
2374 if (rti->UsesOverlay()) {
2375 image = SPR_FLAT_GRASS_TILE;
2384 if (image != SPR_FLAT_GRASS_TILE) {
2387 image = SPR_FLAT_SNOW_DESERT_TILE;
2393 if (rti->UsesOverlay()) {
2437 void DrawTrainDepotSprite(
int x,
int y,
int dir,
RailType railtype)
2444 if (image != SPR_FLAT_GRASS_TILE) image += offset;
2449 if (rti->UsesOverlay()) {
2459 if (depot_sprite != 0) offset = depot_sprite - SPR_RAIL_DEPOT_SE_1;
2464 static int GetSlopePixelZ_Track(
TileIndex tile, uint x, uint y)
2483 static void TileLoop_Track(
TileIndex tile)
2595 default: NOT_REACHED();
2600 if (old_ground != new_ground) {
2601 SetRailGroundType(tile, new_ground);
2613 default: NOT_REACHED();
2628 default: NOT_REACHED();
2669 static bool ClickTile_Track(
TileIndex tile)
2685 td->
str = STR_LAI_RAIL_DESCRIPTION_TRACK;
2689 static const StringID signal_type[6][6] = {
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
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
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
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
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
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
2743 primary_signal = GetSignalType(tile,
TRACK_UPPER);
2746 secondary_signal = primary_signal = GetSignalType(tile,
TRACK_LOWER);
2749 td->
str = signal_type[secondary_signal][primary_signal];
2754 td->
str = STR_LAI_RAIL_DESCRIPTION_TRAIN_DEPOT;
2776 uint num_pieces = 1;
2783 Company::Get(old_owner)->infrastructure.rail[rt] -= num_pieces;
2784 Company::Get(new_owner)->infrastructure.rail[rt] += num_pieces;
2788 Company::Get(old_owner)->infrastructure.signal -= num_sigs;
2789 Company::Get(new_owner)->infrastructure.signal += num_sigs;
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] = {
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)));
2822 case DIAGDIR_NW:
return ((
int)(v->
y_pos & 0x0F) - ((_fractcoords_enter[dir] >> 4) - (length + 1)));
2845 byte fract_coord_leave =
2846 ((_fractcoords_enter[dir] & 0x0F) +
2847 (length + 1) * _deltacoord_leaveoffset[dir]) +
2848 (((_fractcoords_enter[dir] >> 4) +
2849 ((length + 1) * _deltacoord_leaveoffset[dir + 4])) << 4);
2851 byte fract_coord = (x & 0xF) + ((y & 0xF) << 4);
2853 if (_fractcoords_behind[dir] == fract_coord) {
2856 }
else if (_fractcoords_enter[dir] == fract_coord) {
2868 }
else if (fract_coord_leave == fract_coord) {
2871 if ((v = v->
Next()) != NULL) {
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;
2912 if (z_old != z_new || tileh_old != tileh_new)
return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
2919 if (z_old != z_new)
return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
2923 if (tileh_old != tileh_new) {
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;
2970 for (
Corner corner = (
Corner)0; corner < CORNER_END; corner = (
Corner)(corner + 1)) {
2971 if (allowed_corner == corner)
continue;
2990 GetSlopePixelZ_Track,
2994 GetTileTrackStatus_Track,
2998 ChangeTileOwner_Track,
3001 GetFoundation_Track,
3002 TerraformTile_Track,