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-rw-r--r--src/rail_cmd.c1985
1 files changed, 0 insertions, 1985 deletions
diff --git a/src/rail_cmd.c b/src/rail_cmd.c
deleted file mode 100644
index a793bb8a5..000000000
--- a/src/rail_cmd.c
+++ /dev/null
@@ -1,1985 +0,0 @@
-/* $Id$ */
-
-#include "stdafx.h"
-#include "openttd.h"
-#include "bridge_map.h"
-#include "debug.h"
-#include "functions.h"
-#include "rail_map.h"
-#include "road_map.h"
-#include "table/sprites.h"
-#include "table/strings.h"
-#include "map.h"
-#include "tile.h"
-#include "town_map.h"
-#include "tunnel_map.h"
-#include "vehicle.h"
-#include "viewport.h"
-#include "command.h"
-#include "pathfind.h"
-#include "engine.h"
-#include "town.h"
-#include "sound.h"
-#include "station.h"
-#include "sprite.h"
-#include "depot.h"
-#include "waypoint.h"
-#include "window.h"
-#include "rail.h"
-#include "railtypes.h" // include table for railtypes
-#include "newgrf.h"
-#include "yapf/yapf.h"
-#include "newgrf_callbacks.h"
-#include "newgrf_station.h"
-#include "train.h"
-
-const byte _track_sloped_sprites[14] = {
- 14, 15, 22, 13,
- 0, 21, 17, 12,
- 23, 0, 18, 20,
- 19, 16
-};
-
-
-/* 4
- * ---------
- * |\ /|
- * | \ 1/ |
- * | \ / |
- * | \ / |
- * 16| \ |32
- * | / \2 |
- * | / \ |
- * | / \ |
- * |/ \|
- * ---------
- * 8
- */
-
-
-
-/* MAP2 byte: abcd???? => Signal On? Same coding as map3lo
- * MAP3LO byte: abcd???? => Signal Exists?
- * a and b are for diagonals, upper and left,
- * one for each direction. (ie a == NE->SW, b ==
- * SW->NE, or v.v., I don't know. b and c are
- * similar for lower and right.
- * MAP2 byte: ????abcd => Type of ground.
- * MAP3LO byte: ????abcd => Type of rail.
- * MAP5: 00abcdef => rail
- * 01abcdef => rail w/ signals
- * 10uuuuuu => unused
- * 11uuuudd => rail depot
- */
-
-static bool CheckTrackCombination(TileIndex tile, TrackBits to_build, uint flags)
-{
- TrackBits current; /* The current track layout */
- TrackBits future; /* The track layout we want to build */
- _error_message = STR_1001_IMPOSSIBLE_TRACK_COMBINATION;
-
- if (!IsPlainRailTile(tile)) return false;
-
- /* So, we have a tile with tracks on it (and possibly signals). Let's see
- * what tracks first */
- current = GetTrackBits(tile);
- future = current | to_build;
-
- /* Are we really building something new? */
- if (current == future) {
- /* Nothing new is being built */
- _error_message = STR_1007_ALREADY_BUILT;
- return false;
- }
-
- /* Let's see if we may build this */
- if (flags & DC_NO_RAIL_OVERLAP || HasSignals(tile)) {
- /* If we are not allowed to overlap (flag is on for ai players or we have
- * signals on the tile), check that */
- return future == TRACK_BIT_HORZ || future == TRACK_BIT_VERT;
- } else {
- /* Normally, we may overlap and any combination is valid */
- return true;
- }
-}
-
-
-static const TrackBits _valid_tileh_slopes[][15] = {
-
-// set of normal ones
-{
- TRACK_BIT_ALL,
- TRACK_BIT_RIGHT,
- TRACK_BIT_UPPER,
- TRACK_BIT_X,
-
- TRACK_BIT_LEFT,
- 0,
- TRACK_BIT_Y,
- TRACK_BIT_LOWER,
-
- TRACK_BIT_LOWER,
- TRACK_BIT_Y,
- 0,
- TRACK_BIT_LEFT,
-
- TRACK_BIT_X,
- TRACK_BIT_UPPER,
- TRACK_BIT_RIGHT,
-},
-
-// allowed rail for an evenly raised platform
-{
- 0,
- TRACK_BIT_LEFT,
- TRACK_BIT_LOWER,
- TRACK_BIT_Y | TRACK_BIT_LOWER | TRACK_BIT_LEFT,
-
- TRACK_BIT_RIGHT,
- TRACK_BIT_ALL,
- TRACK_BIT_X | TRACK_BIT_LOWER | TRACK_BIT_RIGHT,
- TRACK_BIT_ALL,
-
- TRACK_BIT_UPPER,
- TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_LEFT,
- TRACK_BIT_ALL,
- TRACK_BIT_ALL,
-
- TRACK_BIT_Y | TRACK_BIT_UPPER | TRACK_BIT_RIGHT,
- TRACK_BIT_ALL,
- TRACK_BIT_ALL
-}
-};
-
-uint GetRailFoundation(Slope tileh, TrackBits bits)
-{
- uint i;
-
- if (!IsSteepSlope(tileh)) {
- if ((~_valid_tileh_slopes[0][tileh] & bits) == 0) return 0;
- if ((~_valid_tileh_slopes[1][tileh] & bits) == 0) return tileh;
- }
-
- switch (bits) {
- default: NOT_REACHED();
- case TRACK_BIT_X: i = 0; break;
- case TRACK_BIT_Y: i = 1; break;
- case TRACK_BIT_LEFT: return 15 + 8 + (tileh == SLOPE_STEEP_W ? 4 : 0);
- case TRACK_BIT_LOWER: return 15 + 8 + (tileh == SLOPE_STEEP_S ? 5 : 1);
- case TRACK_BIT_RIGHT: return 15 + 8 + (tileh == SLOPE_STEEP_E ? 6 : 2);
- case TRACK_BIT_UPPER: return 15 + 8 + (tileh == SLOPE_STEEP_N ? 7 : 3);
- }
- switch (tileh) {
- case SLOPE_W:
- case SLOPE_STEEP_W: i += 0; break;
- case SLOPE_S:
- case SLOPE_STEEP_S: i += 2; break;
- case SLOPE_E:
- case SLOPE_STEEP_E: i += 4; break;
- case SLOPE_N:
- case SLOPE_STEEP_N: i += 6; break;
- default: return 0;
- }
- return i + 15;
-}
-
-
-static uint32 CheckRailSlope(Slope tileh, TrackBits rail_bits, TrackBits existing, TileIndex tile)
-{
- if (IsSteepSlope(tileh)) {
- if (existing == 0) {
- TrackBits valid = TRACK_BIT_CROSS | (HASBIT(1 << SLOPE_STEEP_W | 1 << SLOPE_STEEP_E, tileh) ? TRACK_BIT_VERT : TRACK_BIT_HORZ);
- if (valid & rail_bits) return _price.terraform;
- }
- } else {
- rail_bits |= existing;
-
- // don't allow building on the lower side of a coast
- if (IsTileType(tile, MP_WATER) &&
- ~_valid_tileh_slopes[1][tileh] & rail_bits) {
- return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);
- }
-
- // no special foundation
- if ((~_valid_tileh_slopes[0][tileh] & rail_bits) == 0)
- return 0;
-
- if ((~_valid_tileh_slopes[1][tileh] & rail_bits) == 0 || ( // whole tile is leveled up
- (rail_bits == TRACK_BIT_X || rail_bits == TRACK_BIT_Y) &&
- (tileh == SLOPE_W || tileh == SLOPE_S || tileh == SLOPE_E || tileh == SLOPE_N)
- )) { // partly up
- if (existing != 0) {
- return 0;
- } else if (!_patches.build_on_slopes || _is_old_ai_player) {
- return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
- } else {
- return _price.terraform;
- }
- }
- }
- return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
-}
-
-/* Validate functions for rail building */
-static inline bool ValParamTrackOrientation(Track track) {return IsValidTrack(track);}
-
-/** Build a single piece of rail
- * @param tile tile to build on
- * @param p1 railtype of being built piece (normal, mono, maglev)
- * @param p2 rail track to build
- */
-int32 CmdBuildSingleRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
- Slope tileh;
- RailType railtype;
- Track track;
- TrackBits trackbit;
- int32 cost = 0;
- int32 ret;
-
- if (!ValParamRailtype(p1) || !ValParamTrackOrientation(p2)) return CMD_ERROR;
- railtype = (RailType)p1;
- track = (Track)p2;
-
- tileh = GetTileSlope(tile, NULL);
- trackbit = TrackToTrackBits(track);
-
- SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
- switch (GetTileType(tile)) {
- case MP_RAILWAY:
- if (!CheckTrackCombination(tile, trackbit, flags) ||
- !EnsureNoVehicle(tile)) {
- return CMD_ERROR;
- }
- if (!IsTileOwner(tile, _current_player) ||
- !IsCompatibleRail(GetRailType(tile), railtype)) {
- // Get detailed error message
- return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
- }
-
- ret = CheckRailSlope(tileh, trackbit, GetTrackBits(tile), tile);
- if (CmdFailed(ret)) return ret;
- cost += ret;
-
- /* If the rail types don't match, try to convert only if engines of
- * the present rail type are powered on the new rail type. */
- if (GetRailType(tile) != railtype && HasPowerOnRail(GetRailType(tile), railtype)) {
- ret = DoCommand(tile, tile, railtype, flags, CMD_CONVERT_RAIL);
- if (CmdFailed(ret)) return ret;
- cost += ret;
- }
-
- if (flags & DC_EXEC) {
- SetRailGroundType(tile, RAIL_GROUND_BARREN);
- SetTrackBits(tile, GetTrackBits(tile) | trackbit);
- }
- break;
-
- case MP_STREET:
-#define M(x) (1 << (x))
- /* Level crossings may only be built on these slopes */
- if (!HASBIT(M(SLOPE_SEN) | M(SLOPE_ENW) | M(SLOPE_NWS) | M(SLOPE_NS) | M(SLOPE_WSE) | M(SLOPE_EW) | M(SLOPE_FLAT), tileh)) {
- return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
- }
-#undef M
-
- if (!EnsureNoVehicle(tile)) return CMD_ERROR;
-
- if (GetRoadTileType(tile) == ROAD_TILE_NORMAL) {
- if (HasRoadWorks(tile)) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS);
-
- if ((track == TRACK_X && GetRoadBits(tile) == ROAD_Y) ||
- (track == TRACK_Y && GetRoadBits(tile) == ROAD_X)) {
- if (flags & DC_EXEC) {
- MakeRoadCrossing(tile, GetTileOwner(tile), _current_player, (track == TRACK_X ? AXIS_Y : AXIS_X), railtype, GetTownIndex(tile));
- }
- break;
- }
- }
-
- if (IsLevelCrossing(tile) && GetCrossingRailBits(tile) == trackbit) {
- return_cmd_error(STR_1007_ALREADY_BUILT);
- }
- /* FALLTHROUGH */
-
- default:
- ret = CheckRailSlope(tileh, trackbit, 0, tile);
- if (CmdFailed(ret)) return ret;
- cost += ret;
-
- ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
- if (CmdFailed(ret)) return ret;
- cost += ret;
-
- if (flags & DC_EXEC) MakeRailNormal(tile, _current_player, trackbit, railtype);
- break;
- }
-
- if (flags & DC_EXEC) {
- MarkTileDirtyByTile(tile);
- SetSignalsOnBothDir(tile, track);
- YapfNotifyTrackLayoutChange(tile, track);
- }
-
- return cost + _price.build_rail;
-}
-
-/** Remove a single piece of track
- * @param tile tile to remove track from
- * @param p1 unused
- * @param p2 rail orientation
- */
-int32 CmdRemoveSingleRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
- Track track = (Track)p2;
- TrackBits trackbit;
- int32 cost = _price.remove_rail;
- bool crossing = false;
-
- if (!ValParamTrackOrientation(p2)) return CMD_ERROR;
- trackbit = TrackToTrackBits(track);
-
- SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
- switch (GetTileType(tile)) {
- case MP_STREET: {
- if (!IsLevelCrossing(tile) ||
- GetCrossingRailBits(tile) != trackbit ||
- (_current_player != OWNER_WATER && !CheckTileOwnership(tile)) ||
- !EnsureNoVehicle(tile)) {
- return CMD_ERROR;
- }
-
- if (flags & DC_EXEC) {
- MakeRoadNormal(tile, GetCrossingRoadOwner(tile), GetCrossingRoadBits(tile), GetTownIndex(tile));
- }
- break;
- }
-
- case MP_RAILWAY: {
- TrackBits present;
-
- if (!IsPlainRailTile(tile) ||
- (_current_player != OWNER_WATER && !CheckTileOwnership(tile)) ||
- !EnsureNoVehicle(tile)) {
- return CMD_ERROR;
- }
-
- present = GetTrackBits(tile);
- if ((present & trackbit) == 0) return CMD_ERROR;
- if (present == (TRACK_BIT_X | TRACK_BIT_Y)) crossing = true;
-
- /* Charge extra to remove signals on the track, if they are there */
- if (HasSignalOnTrack(tile, track))
- cost += DoCommand(tile, track, 0, flags, CMD_REMOVE_SIGNALS);
-
- if (flags & DC_EXEC) {
- present ^= trackbit;
- if (present == 0) {
- DoClearSquare(tile);
- } else {
- SetTrackBits(tile, present);
- }
- }
- break;
- }
-
- default: return CMD_ERROR;
- }
-
- if (flags & DC_EXEC) {
- MarkTileDirtyByTile(tile);
- if (crossing) {
- /* crossing is set when only TRACK_BIT_X and TRACK_BIT_Y are set. As we
- * are removing one of these pieces, we'll need to update signals for
- * both directions explicitly, as after the track is removed it won't
- * 'connect' with the other piece. */
- SetSignalsOnBothDir(tile, TRACK_X);
- SetSignalsOnBothDir(tile, TRACK_Y);
- YapfNotifyTrackLayoutChange(tile, TRACK_X);
- YapfNotifyTrackLayoutChange(tile, TRACK_Y);
- } else {
- SetSignalsOnBothDir(tile, track);
- YapfNotifyTrackLayoutChange(tile, track);
- }
- }
-
- return cost;
-}
-
-
-static const TileIndexDiffC _trackdelta[] = {
- { -1, 0 }, { 0, 1 }, { -1, 0 }, { 0, 1 }, { 1, 0 }, { 0, 1 },
- { 0, 0 },
- { 0, 0 },
- { 1, 0 }, { 0, -1 }, { 0, -1 }, { 1, 0 }, { 0, -1 }, { -1, 0 },
- { 0, 0 },
- { 0, 0 }
-};
-
-
-static int32 ValidateAutoDrag(Trackdir *trackdir, TileIndex start, TileIndex end)
-{
- int x = TileX(start);
- int y = TileY(start);
- int ex = TileX(end);
- int ey = TileY(end);
- int dx, dy, trdx, trdy;
-
- if (!ValParamTrackOrientation(*trackdir)) return CMD_ERROR;
-
- // calculate delta x,y from start to end tile
- dx = ex - x;
- dy = ey - y;
-
- // calculate delta x,y for the first direction
- trdx = _trackdelta[*trackdir].x;
- trdy = _trackdelta[*trackdir].y;
-
- if (!IsDiagonalTrackdir(*trackdir)) {
- trdx += _trackdelta[*trackdir ^ 1].x;
- trdy += _trackdelta[*trackdir ^ 1].y;
- }
-
- // validate the direction
- while (
- (trdx <= 0 && dx > 0) ||
- (trdx >= 0 && dx < 0) ||
- (trdy <= 0 && dy > 0) ||
- (trdy >= 0 && dy < 0)
- ) {
- if (!HASBIT(*trackdir, 3)) { // first direction is invalid, try the other
- SETBIT(*trackdir, 3); // reverse the direction
- trdx = -trdx;
- trdy = -trdy;
- } else { // other direction is invalid too, invalid drag
- return CMD_ERROR;
- }
- }
-
- // (for diagonal tracks, this is already made sure of by above test), but:
- // for non-diagonal tracks, check if the start and end tile are on 1 line
- if (!IsDiagonalTrackdir(*trackdir)) {
- trdx = _trackdelta[*trackdir].x;
- trdy = _trackdelta[*trackdir].y;
- if (abs(dx) != abs(dy) && abs(dx) + abs(trdy) != abs(dy) + abs(trdx))
- return CMD_ERROR;
- }
-
- return 0;
-}
-
-/** Build a stretch of railroad tracks.
- * @param tile start tile of drag
- * @param p1 end tile of drag
- * @param p2 various bitstuffed elements
- * - p2 = (bit 0-3) - railroad type normal/maglev (0 = normal, 1 = mono, 2 = maglev)
- * - p2 = (bit 4-6) - track-orientation, valid values: 0-5 (Track enum)
- * - p2 = (bit 7) - 0 = build, 1 = remove tracks
- */
-static int32 CmdRailTrackHelper(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
- int32 ret, total_cost = 0;
- Track track = (Track)GB(p2, 4, 3);
- Trackdir trackdir;
- byte mode = HASBIT(p2, 7);
- RailType railtype = (RailType)GB(p2, 0, 4);
- TileIndex end_tile;
-
- if (!ValParamRailtype(railtype) || !ValParamTrackOrientation(track)) return CMD_ERROR;
- if (p1 >= MapSize()) return CMD_ERROR;
- end_tile = p1;
- trackdir = TrackToTrackdir(track);
-
- SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
- if (CmdFailed(ValidateAutoDrag(&trackdir, tile, end_tile))) return CMD_ERROR;
-
- if (flags & DC_EXEC) SndPlayTileFx(SND_20_SPLAT_2, tile);
-
- for (;;) {
- ret = DoCommand(tile, railtype, TrackdirToTrack(trackdir), flags, (mode == 0) ? CMD_BUILD_SINGLE_RAIL : CMD_REMOVE_SINGLE_RAIL);
-
- if (CmdFailed(ret)) {
- if ((_error_message != STR_1007_ALREADY_BUILT) && (mode == 0)) break;
- _error_message = INVALID_STRING_ID;
- } else {
- total_cost += ret;
- }
-
- if (tile == end_tile) break;
-
- tile += ToTileIndexDiff(_trackdelta[trackdir]);
-
- // toggle railbit for the non-diagonal tracks
- if (!IsDiagonalTrackdir(trackdir)) trackdir ^= 1;
- }
-
- return (total_cost == 0) ? CMD_ERROR : total_cost;
-}
-
-/** Build rail on a stretch of track.
- * Stub for the unified rail builder/remover
- * @see CmdRailTrackHelper
- */
-int32 CmdBuildRailroadTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
- return CmdRailTrackHelper(tile, flags, p1, CLRBIT(p2, 7));
-}
-
-/** Build rail on a stretch of track.
- * Stub for the unified rail builder/remover
- * @see CmdRailTrackHelper
- */
-int32 CmdRemoveRailroadTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
- return CmdRailTrackHelper(tile, flags, p1, SETBIT(p2, 7));
-}
-
-/** Build a train depot
- * @param tile position of the train depot
- * @param p1 rail type
- * @param p2 entrance direction (DiagDirection)
- *
- * @todo When checking for the tile slope,
- * distingush between "Flat land required" and "land sloped in wrong direction"
- */
-int32 CmdBuildTrainDepot(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
- Depot *d;
- int32 cost, ret;
- Slope tileh;
-
- SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
- if (!EnsureNoVehicle(tile)) return CMD_ERROR;
- /* check railtype and valid direction for depot (0 through 3), 4 in total */
- if (!ValParamRailtype(p1) || p2 > 3) return CMD_ERROR;
-
- tileh = GetTileSlope(tile, NULL);
-
- /* Prohibit construction if
- * The tile is non-flat AND
- * 1) The AI is "old-school"
- * 2) build-on-slopes is disabled
- * 3) the tile is steep i.e. spans two height levels
- * 4) the exit points in the wrong direction
- */
-
- if (tileh != SLOPE_FLAT && (
- _is_old_ai_player ||
- !_patches.build_on_slopes ||
- IsSteepSlope(tileh) ||
- !CanBuildDepotByTileh(p2, tileh)
- )) {
- return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
- }
-
- ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
- if (CmdFailed(ret)) return CMD_ERROR;
- cost = ret;
-
- if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);
-
- d = AllocateDepot();
- if (d == NULL) return CMD_ERROR;
-
- if (flags & DC_EXEC) {
- MakeRailDepot(tile, _current_player, p2, p1);
- MarkTileDirtyByTile(tile);
-
- d->xy = tile;
- d->town_index = ClosestTownFromTile(tile, (uint)-1)->index;
-
- UpdateSignalsOnSegment(tile, p2);
- YapfNotifyTrackLayoutChange(tile, TrackdirToTrack(DiagdirToDiagTrackdir(p2)));
- }
-
- return cost + _price.build_train_depot;
-}
-
-/** Build signals, alternate between double/single, signal/semaphore,
- * pre/exit/combo-signals, and what-else not
- * @param tile tile where to build the signals
- * @param p1 various bitstuffed elements
- * - p1 = (bit 0-2) - track-orientation, valid values: 0-5 (Track enum)
- * - p1 = (bit 3) - choose semaphores/signals or cycle normal/pre/exit/combo depending on context
- * @param p2 used for CmdBuildManySignals() to copy direction of first signal
- * TODO: p2 should be replaced by two bits for "along" and "against" the track.
- */
-int32 CmdBuildSingleSignal(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
- SignalVariant sigvar;
- bool pre_signal;
- Track track = (Track)(p1 & 0x7);
- int32 cost;
-
- // Same bit, used in different contexts
- sigvar = HASBIT(p1, 3) ? SIG_SEMAPHORE : SIG_ELECTRIC;
- pre_signal = HASBIT(p1, 3);
-
- if (!ValParamTrackOrientation(track) || !IsTileType(tile, MP_RAILWAY) || !EnsureNoVehicle(tile))
- return CMD_ERROR;
-
- /* Protect against invalid signal copying */
- if (p2 != 0 && (p2 & SignalOnTrack(track)) == 0) return CMD_ERROR;
-
- /* You can only build signals on plain rail tiles, and the selected track must exist */
- if (!IsPlainRailTile(tile) || !HasTrack(tile, track)) return CMD_ERROR;
-
- if (!CheckTileOwnership(tile)) return CMD_ERROR;
-
- _error_message = STR_1005_NO_SUITABLE_RAILROAD_TRACK;
-
- {
- /* See if this is a valid track combination for signals, (ie, no overlap) */
- TrackBits trackbits = GetTrackBits(tile);
- if (KILL_FIRST_BIT(trackbits) != 0 && /* More than one track present */
- trackbits != TRACK_BIT_HORZ &&
- trackbits != TRACK_BIT_VERT) {
- return CMD_ERROR;
- }
- }
-
- SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
- if (!HasSignalOnTrack(tile, track)) {
- // build new signals
- cost = _price.build_signals;
- } else {
- if (p2 != 0 && sigvar != GetSignalVariant(tile)) {
- // convert signals <-> semaphores
- cost = _price.build_signals + _price.remove_signals;
- } else {
- // it is free to change orientation/pre-exit-combo signals
- cost = 0;
- }
- }
-
- if (flags & DC_EXEC) {
- if (!HasSignals(tile)) {
- // there are no signals at all on this tile yet
- _m[tile].m5 |= RAIL_TILE_SIGNALS; // change into signals
- _m[tile].m2 |= 0xF0; // all signals are on
- _m[tile].m3 &= ~0xF0; // no signals built by default
- SetSignalType(tile, SIGTYPE_NORMAL);
- SetSignalVariant(tile, sigvar);
- }
-
- if (p2 == 0) {
- if (!HasSignalOnTrack(tile, track)) {
- // build new signals
- _m[tile].m3 |= SignalOnTrack(track);
- } else {
- if (pre_signal) {
- // cycle between normal -> pre -> exit -> combo -> ...
- SignalType type = GetSignalType(tile);
-
- SetSignalType(tile, type == SIGTYPE_COMBO ? SIGTYPE_NORMAL : type + 1);
- } else {
- CycleSignalSide(tile, track);
- }
- }
- } else {
- /* If CmdBuildManySignals is called with copying signals, just copy the
- * direction of the first signal given as parameter by CmdBuildManySignals */
- _m[tile].m3 &= ~SignalOnTrack(track);
- _m[tile].m3 |= p2 & SignalOnTrack(track);
- SetSignalVariant(tile, sigvar);
- }
-
- MarkTileDirtyByTile(tile);
- SetSignalsOnBothDir(tile, track);
- YapfNotifyTrackLayoutChange(tile, track);
- }
-
- return cost;
-}
-
-/** Build many signals by dragging; AutoSignals
- * @param tile start tile of drag
- * @param p1 end tile of drag
- * @param p2 various bitstuffed elements
- * - p2 = (bit 0) - 0 = build, 1 = remove signals
- * - p2 = (bit 3) - 0 = signals, 1 = semaphores
- * - p2 = (bit 4- 6) - track-orientation, valid values: 0-5 (Track enum)
- * - p2 = (bit 24-31) - user defined signals_density
- */
-static int32 CmdSignalTrackHelper(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
- int32 ret, total_cost, signal_ctr;
- byte signals;
- bool error = true;
- TileIndex end_tile;
-
- int mode = p2 & 0x1;
- Track track = GB(p2, 4, 3);
- Trackdir trackdir = TrackToTrackdir(track);
- byte semaphores = (HASBIT(p2, 3) ? 8 : 0);
- byte signal_density = (p2 >> 24);
-
- if (p1 >= MapSize()) return CMD_ERROR;
- end_tile = p1;
- if (signal_density == 0 || signal_density > 20) return CMD_ERROR;
-
- if (!IsTileType(tile, MP_RAILWAY)) return CMD_ERROR;
-
- SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
- /* for vertical/horizontal tracks, double the given signals density
- * since the original amount will be too dense (shorter tracks) */
- if (!IsDiagonalTrack(track)) signal_density *= 2;
-
- if (CmdFailed(ValidateAutoDrag(&trackdir, tile, end_tile))) return CMD_ERROR;
-
- track = TrackdirToTrack(trackdir); /* trackdir might have changed, keep track in sync */
-
- // copy the signal-style of the first rail-piece if existing
- if (HasSignals(tile)) {
- signals = _m[tile].m3 & SignalOnTrack(track);
- if (signals == 0) signals = SignalOnTrack(track); /* Can this actually occur? */
-
- // copy signal/semaphores style (independent of CTRL)
- semaphores = (GetSignalVariant(tile) == SIG_ELECTRIC ? 0 : 8);
- } else { // no signals exist, drag a two-way signal stretch
- signals = SignalOnTrack(track);
- }
-
- /* signal_ctr - amount of tiles already processed
- * signals_density - patch setting to put signal on every Nth tile (double space on |, -- tracks)
- **********
- * trackdir - trackdir to build with autorail
- * semaphores - semaphores or signals
- * signals - is there a signal/semaphore on the first tile, copy its style (two-way/single-way)
- * and convert all others to semaphore/signal
- * mode - 1 remove signals, 0 build signals */
- signal_ctr = total_cost = 0;
- for (;;) {
- // only build/remove signals with the specified density
- if (signal_ctr % signal_density == 0) {
- ret = DoCommand(tile, TrackdirToTrack(trackdir) | semaphores, signals, flags, (mode == 1) ? CMD_REMOVE_SIGNALS : CMD_BUILD_SIGNALS);
-
- /* Be user-friendly and try placing signals as much as possible */
- if (!CmdFailed(ret)) {
- error = false;
- total_cost += ret;
- }
- }
-
- if (tile == end_tile) break;
-
- tile += ToTileIndexDiff(_trackdelta[trackdir]);
- signal_ctr++;
-
- // toggle railbit for the non-diagonal tracks (|, -- tracks)
- if (!IsDiagonalTrackdir(trackdir)) trackdir ^= 1;
- }
-
- return error ? CMD_ERROR : total_cost;
-}
-
-/** Build signals on a stretch of track.
- * Stub for the unified signal builder/remover
- * @see CmdSignalTrackHelper
- */
-int32 CmdBuildSignalTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
- return CmdSignalTrackHelper(tile, flags, p1, p2);
-}
-
-/** Remove signals
- * @param tile coordinates where signal is being deleted from
- * @param p1 track to remove signal from (Track enum)
- */
-int32 CmdRemoveSingleSignal(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
- Track track = (Track)(p1 & 0x7);
-
- if (!ValParamTrackOrientation(track) ||
- !IsTileType(tile, MP_RAILWAY) ||
- !EnsureNoVehicle(tile) ||
- !HasSignalOnTrack(tile, track)) {
- return CMD_ERROR;
- }
-
- /* Only water can remove signals from anyone */
- if (_current_player != OWNER_WATER && !CheckTileOwnership(tile)) return CMD_ERROR;
-
- SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
- /* Do it? */
- if (flags & DC_EXEC) {
- _m[tile].m3 &= ~SignalOnTrack(track);
-
- /* removed last signal from tile? */
- if (GB(_m[tile].m3, 4, 4) == 0) {
- SB(_m[tile].m2, 4, 4, 0);
- SB(_m[tile].m5, 6, 2, RAIL_TILE_NORMAL >> 6); // XXX >> because the constant is meant for direct application, not use with SB
- SetSignalVariant(tile, SIG_ELECTRIC); // remove any possible semaphores
- }
-
- SetSignalsOnBothDir(tile, track);
- YapfNotifyTrackLayoutChange(tile, track);
-
- MarkTileDirtyByTile(tile);
- }
-
- return _price.remove_signals;
-}
-
-/** Remove signals on a stretch of track.
- * Stub for the unified signal builder/remover
- * @see CmdSignalTrackHelper
- */
-int32 CmdRemoveSignalTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
- return CmdSignalTrackHelper(tile, flags, p1, SETBIT(p2, 0));
-}
-
-typedef int32 DoConvertRailProc(TileIndex tile, RailType totype, bool exec);
-
-static int32 DoConvertRail(TileIndex tile, RailType totype, bool exec)
-{
- if (!CheckTileOwnership(tile)) return CMD_ERROR;
-
- if (!EnsureNoVehicle(tile) && (!IsCompatibleRail(GetRailType(tile), totype) || IsPlainRailTile(tile))) return CMD_ERROR;
-
- // tile is already of requested type?
- if (GetRailType(tile) == totype) return CMD_ERROR;
-
- // 'hidden' elrails can't be downgraded to normal rail when elrails are disabled
- if (_patches.disable_elrails && totype == RAILTYPE_RAIL && GetRailType(tile) == RAILTYPE_ELECTRIC) return CMD_ERROR;
-
- // change type.
- if (exec) {
- TrackBits tracks;
- SetRailType(tile, totype);
- MarkTileDirtyByTile(tile);
-
- // notify YAPF about the track layout change
- for (tracks = GetTrackBits(tile); tracks != TRACK_BIT_NONE; tracks = KILL_FIRST_BIT(tracks))
- YapfNotifyTrackLayoutChange(tile, FIND_FIRST_BIT(tracks));
-
- if (IsTileDepotType(tile, TRANSPORT_RAIL)) {
- Vehicle *v;
-
- /* Update build vehicle window related to this depot */
- InvalidateWindowData(WC_BUILD_VEHICLE, tile);
-
- /* update power of trains in this depot */
- FOR_ALL_VEHICLES(v) {
- if (v->type == VEH_Train && IsFrontEngine(v) && v->tile == tile && v->u.rail.track == 0x80) {
- TrainPowerChanged(v);
- }
- }
- }
- }
-
- return _price.build_rail / 2;
-}
-
-extern int32 DoConvertStationRail(TileIndex tile, RailType totype, bool exec);
-extern int32 DoConvertStreetRail(TileIndex tile, RailType totype, bool exec);
-extern int32 DoConvertTunnelBridgeRail(TileIndex tile, RailType totype, bool exec);
-
-/** Convert one rail type to the other. You can convert normal rail to
- * monorail/maglev easily or vice-versa.
- * @param tile end tile of rail conversion drag
- * @param p1 start tile of drag
- * @param p2 new railtype to convert to
- */
-int32 CmdConvertRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
- int32 ret, cost, money;
- int ex;
- int ey;
- int sx, sy, x, y;
-
- SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
- if (!ValParamRailtype(p2)) return CMD_ERROR;
- if (p1 >= MapSize()) return CMD_ERROR;
-
- // make sure sx,sy are smaller than ex,ey
- ex = TileX(tile);
- ey = TileY(tile);
- sx = TileX(p1);
- sy = TileY(p1);
- if (ex < sx) intswap(ex, sx);
- if (ey < sy) intswap(ey, sy);
-
- money = GetAvailableMoneyForCommand();
- cost = 0;
- ret = 0;
-
- for (x = sx; x <= ex; ++x) {
- for (y = sy; y <= ey; ++y) {
- TileIndex tile = TileXY(x, y);
- DoConvertRailProc* proc;
-
- switch (GetTileType(tile)) {
- case MP_RAILWAY: proc = DoConvertRail; break;
- case MP_STATION: proc = DoConvertStationRail; break;
- case MP_STREET: proc = DoConvertStreetRail; break;
- case MP_TUNNELBRIDGE: proc = DoConvertTunnelBridgeRail; break;
- default: continue;
- }
-
- ret = proc(tile, p2, false);
- if (CmdFailed(ret)) continue;
- cost += ret;
-
- if (flags & DC_EXEC) {
- money -= ret;
- if (money < 0) {
- _additional_cash_required = ret;
- return cost - ret;
- }
- proc(tile, p2, true);
- }
- }
- }
-
- return (cost == 0) ? ret : cost;
-}
-
-static int32 RemoveTrainDepot(TileIndex tile, uint32 flags)
-{
- if (!CheckTileOwnership(tile) && _current_player != OWNER_WATER)
- return CMD_ERROR;
-
- if (!EnsureNoVehicle(tile))
- return CMD_ERROR;
-
- if (flags & DC_EXEC) {
- DiagDirection dir = GetRailDepotDirection(tile);
-
- DeleteDepot(GetDepotByTile(tile));
- UpdateSignalsOnSegment(tile, dir);
- YapfNotifyTrackLayoutChange(tile, TrackdirToTrack(DiagdirToDiagTrackdir(dir)));
- }
-
- return _price.remove_train_depot;
-}
-
-static int32 ClearTile_Track(TileIndex tile, byte flags)
-{
- int32 cost;
- int32 ret;
-
- if (flags & DC_AUTO) {
- if (!IsTileOwner(tile, _current_player))
- return_cmd_error(STR_1024_AREA_IS_OWNED_BY_ANOTHER);
-
- if (IsPlainRailTile(tile)) {
- return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);
- } else {
- return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED);
- }
- }
-
- cost = 0;
-
- switch (GetRailTileType(tile)) {
- case RAIL_TILE_SIGNALS:
- case RAIL_TILE_NORMAL: {
- TrackBits tracks = GetTrackBits(tile);
- uint i;
-
- for_each_bit (i, tracks) {
- ret = DoCommand(tile, 0, i, flags, CMD_REMOVE_SINGLE_RAIL);
- if (CmdFailed(ret)) return CMD_ERROR;
- cost += ret;
- }
- return cost;
- }
-
- case RAIL_TILE_DEPOT_WAYPOINT:
- if (GetRailTileSubtype(tile) == RAIL_SUBTYPE_DEPOT) {
- return RemoveTrainDepot(tile, flags);
- } else {
- return RemoveTrainWaypoint(tile, flags, false);
- }
-
- default:
- return CMD_ERROR;
- }
-}
-
-#include "table/track_land.h"
-
-static void DrawSingleSignal(TileIndex tile, byte condition, uint image, uint pos)
-{
- bool side = _opt.road_side & _patches.signal_side;
- static const Point SignalPositions[2][12] = {
- { /* Signals on the left side */
- /* LEFT LEFT RIGHT RIGHT UPPER UPPER */
- { 8, 5}, {14, 1}, { 1, 14}, { 9, 11}, { 1, 0}, { 3, 10},
- /* LOWER LOWER X X Y Y */
- {11, 4}, {14, 14}, {11, 3}, { 4, 13}, { 3, 4}, {11, 13}
- }, { /* Signals on the right side */
- /* LEFT LEFT RIGHT RIGHT UPPER UPPER */
- {14, 1}, {12, 10}, { 4, 6}, { 1, 14}, {10, 4}, { 0, 1},
- /* LOWER LOWER X X Y Y */
- {14, 14}, { 5, 12}, {11, 13}, { 4, 3}, {13, 4}, { 3, 11}
- }
- };
-
- static const SpriteID SignalBase[2][2][4] = {
- { /* Signals on left side */
- { 0x4FB, 0x1323, 0x1333, 0x1343}, /* light signals */
- { 0x1353, 0x1363, 0x1373, 0x1383} /* semaphores */
- }, { /* Signals on right side */
- { 0x4FB, 0x1323, 0x1333, 0x1343}, /* light signals */
- { 0x1446, 0x1456, 0x1466, 0x1476} /* semaphores */
- /* | | | | */
- /* normal, entry, exit, combo */
- }
- };
-
- uint x = TileX(tile) * TILE_SIZE + SignalPositions[side][pos].x;
- uint y = TileY(tile) * TILE_SIZE + SignalPositions[side][pos].y;
-
- SpriteID sprite;
-
- /* _signal_base is set by our NewGRF Action 5 loader. If it is 0 then we
- * just draw the standard signals, else we get the offset from _signal_base
- * and draw that sprite. All the signal sprites are loaded sequentially. */
- if (_signal_base == 0 || (GetSignalType(tile) == 0 && GetSignalVariant(tile) == SIG_ELECTRIC)) {
- sprite = SignalBase[side][GetSignalVariant(tile)][GetSignalType(tile)] + image + condition;
- } else {
- sprite = _signal_base + (GetSignalType(tile) - 1) * 16 + GetSignalVariant(tile) * 64 + image + condition;
- }
-
- AddSortableSpriteToDraw(sprite, x, y, 1, 1, 10, GetSlopeZ(x,y));
-}
-
-static uint32 _drawtile_track_palette;
-
-
-static void DrawTrackFence_NW(const TileInfo *ti)
-{
- uint32 image = 0x515;
- if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? 0x519 : 0x51B;
- AddSortableSpriteToDraw(image | _drawtile_track_palette,
- ti->x, ti->y + 1, 16, 1, 4, ti->z);
-}
-
-static void DrawTrackFence_SE(const TileInfo *ti)
-{
- uint32 image = 0x515;
- if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? 0x519 : 0x51B;
- AddSortableSpriteToDraw(image | _drawtile_track_palette,
- ti->x, ti->y + TILE_SIZE - 1, 16, 1, 4, ti->z);
-}
-
-static void DrawTrackFence_NW_SE(const TileInfo *ti)
-{
- DrawTrackFence_NW(ti);
- DrawTrackFence_SE(ti);
-}
-
-static void DrawTrackFence_NE(const TileInfo *ti)
-{
- uint32 image = 0x516;
- if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? 0x51A : 0x51C;
- AddSortableSpriteToDraw(image | _drawtile_track_palette,
- ti->x + 1, ti->y, 1, 16, 4, ti->z);
-}
-
-static void DrawTrackFence_SW(const TileInfo *ti)
-{
- uint32 image = 0x516;
- if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? 0x51A : 0x51C;
- AddSortableSpriteToDraw(image | _drawtile_track_palette,
- ti->x + TILE_SIZE - 1, ti->y, 1, 16, 4, ti->z);
-}
-
-static void DrawTrackFence_NE_SW(const TileInfo *ti)
-{
- DrawTrackFence_NE(ti);
- DrawTrackFence_SW(ti);
-}
-
-static void DrawTrackFence_NS_1(const TileInfo *ti)
-{
- int z = ti->z;
- if (ti->tileh & SLOPE_W) z += TILE_HEIGHT;
- AddSortableSpriteToDraw(0x517 | _drawtile_track_palette,
- ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
-}
-
-static void DrawTrackFence_NS_2(const TileInfo *ti)
-{
- int z = ti->z;
- if (ti->tileh & SLOPE_E) z += TILE_HEIGHT;
- AddSortableSpriteToDraw(0x517 | _drawtile_track_palette,
- ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
-}
-
-static void DrawTrackFence_WE_1(const TileInfo *ti)
-{
- int z = ti->z;
- if (ti->tileh & SLOPE_N) z += TILE_HEIGHT;
- AddSortableSpriteToDraw(0x518 | _drawtile_track_palette,
- ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
-}
-
-static void DrawTrackFence_WE_2(const TileInfo *ti)
-{
- int z = ti->z;
- if (ti->tileh & SLOPE_S) z += TILE_HEIGHT;
- AddSortableSpriteToDraw(0x518 | _drawtile_track_palette,
- ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
-}
-
-
-static void DrawTrackDetails(const TileInfo* ti)
-{
- switch (GetRailGroundType(ti->tile)) {
- case RAIL_GROUND_FENCE_NW: DrawTrackFence_NW(ti); break;
- case RAIL_GROUND_FENCE_SE: DrawTrackFence_SE(ti); break;
- case RAIL_GROUND_FENCE_SENW: DrawTrackFence_NW_SE(ti); break;
- case RAIL_GROUND_FENCE_NE: DrawTrackFence_NE(ti); break;
- case RAIL_GROUND_FENCE_SW: DrawTrackFence_SW(ti); break;
- case RAIL_GROUND_FENCE_NESW: DrawTrackFence_NE_SW(ti); break;
- case RAIL_GROUND_FENCE_VERT1: DrawTrackFence_NS_1(ti); break;
- case RAIL_GROUND_FENCE_VERT2: DrawTrackFence_NS_2(ti); break;
- case RAIL_GROUND_FENCE_HORIZ1: DrawTrackFence_WE_1(ti); break;
- case RAIL_GROUND_FENCE_HORIZ2: DrawTrackFence_WE_2(ti); break;
- default: break;
- }
-}
-
-
-/**
- * Draw ground sprite and track bits
- * @param ti TileInfo
- * @param track TrackBits to draw
- * @param earth Draw as earth
- * @param snow Draw as snow
- * @param flat Always draw foundation
- */
-static void DrawTrackBits(TileInfo* ti, TrackBits track)
-{
- const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
- PalSpriteID image;
- bool junction = false;
-
- // Select the sprite to use.
- (image = rti->base_sprites.track_y, track == TRACK_BIT_Y) ||
- (image++, track == TRACK_BIT_X) ||
- (image++, track == TRACK_BIT_UPPER) ||
- (image++, track == TRACK_BIT_LOWER) ||
- (image++, track == TRACK_BIT_RIGHT) ||
- (image++, track == TRACK_BIT_LEFT) ||
- (image++, track == TRACK_BIT_CROSS) ||
-
- (image = rti->base_sprites.track_ns, track == TRACK_BIT_HORZ) ||
- (image++, track == TRACK_BIT_VERT) ||
-
- (junction = true, false) ||
- (image = rti->base_sprites.ground, (track & TRACK_BIT_3WAY_NE) == 0) ||
- (image++, (track & TRACK_BIT_3WAY_SW) == 0) ||
- (image++, (track & TRACK_BIT_3WAY_NW) == 0) ||
- (image++, (track & TRACK_BIT_3WAY_SE) == 0) ||
- (image++, true);
-
- if (ti->tileh != SLOPE_FLAT) {
- uint foundation = GetRailFoundation(ti->tileh, track);
-
- if (foundation != 0) DrawFoundation(ti, foundation);
-
- // DrawFoundation() modifies ti.
- // Default sloped sprites..
- if (ti->tileh != SLOPE_FLAT)
- image = _track_sloped_sprites[ti->tileh - 1] + rti->base_sprites.track_y;
- }
-
- switch (GetRailGroundType(ti->tile)) {
- case RAIL_GROUND_BARREN: image |= PALETTE_TO_BARE_LAND; break;
- case RAIL_GROUND_ICE_DESERT: image += rti->snow_offset; break;
- default: break;
- }
-
- DrawGroundSprite(image);
-
- // Draw track pieces individually for junction tiles
- if (junction) {
- if (track & TRACK_BIT_X) DrawGroundSprite(rti->base_sprites.single_y);
- if (track & TRACK_BIT_Y) DrawGroundSprite(rti->base_sprites.single_x);
- if (track & TRACK_BIT_UPPER) DrawGroundSprite(rti->base_sprites.single_n);
- if (track & TRACK_BIT_LOWER) DrawGroundSprite(rti->base_sprites.single_s);
- if (track & TRACK_BIT_LEFT) DrawGroundSprite(rti->base_sprites.single_w);
- if (track & TRACK_BIT_RIGHT) DrawGroundSprite(rti->base_sprites.single_e);
- }
-
- if (GetRailType(ti->tile) == RAILTYPE_ELECTRIC) DrawCatenary(ti);
-
-}
-
-static void DrawSignals(TileIndex tile, TrackBits rails)
-{
-#define MAYBE_DRAW_SIGNAL(x,y,z) if (IsSignalPresent(tile, x)) DrawSingleSignal(tile, GetSingleSignalState(tile, x), y - 0x4FB, z)
-
- if (!(rails & TRACK_BIT_Y)) {
- if (!(rails & TRACK_BIT_X)) {
- if (rails & TRACK_BIT_LEFT) {
- MAYBE_DRAW_SIGNAL(2, 0x509, 0);
- MAYBE_DRAW_SIGNAL(3, 0x507, 1);
- }
- if (rails & TRACK_BIT_RIGHT) {
- MAYBE_DRAW_SIGNAL(0, 0x509, 2);
- MAYBE_DRAW_SIGNAL(1, 0x507, 3);
- }
- if (rails & TRACK_BIT_UPPER) {
- MAYBE_DRAW_SIGNAL(3, 0x505, 4);
- MAYBE_DRAW_SIGNAL(2, 0x503, 5);
- }
- if (rails & TRACK_BIT_LOWER) {
- MAYBE_DRAW_SIGNAL(1, 0x505, 6);
- MAYBE_DRAW_SIGNAL(0, 0x503, 7);
- }
- } else {
- MAYBE_DRAW_SIGNAL(3, 0x4FB, 8);
- MAYBE_DRAW_SIGNAL(2, 0x4FD, 9);
- }
- } else {
- MAYBE_DRAW_SIGNAL(3, 0x4FF, 10);
- MAYBE_DRAW_SIGNAL(2, 0x501, 11);
- }
-}
-
-static void DrawTile_Track(TileInfo *ti)
-{
- const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
- PalSpriteID image;
-
- _drawtile_track_palette = SPRITE_PALETTE(PLAYER_SPRITE_COLOR(GetTileOwner(ti->tile)));
-
- if (IsPlainRailTile(ti->tile)) {
- TrackBits rails = GetTrackBits(ti->tile);
-
- DrawTrackBits(ti, rails);
-
- if (_display_opt & DO_FULL_DETAIL) DrawTrackDetails(ti);
-
- if (HasSignals(ti->tile)) DrawSignals(ti->tile, rails);
- } else {
- // draw depot/waypoint
- const DrawTileSprites* dts;
- const DrawTileSeqStruct* dtss;
- uint32 relocation;
-
- if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, ti->tileh);
-
- if (GetRailTileSubtype(ti->tile) == RAIL_SUBTYPE_DEPOT) {
- dts = &_depot_gfx_table[GetRailDepotDirection(ti->tile)];
-
- relocation = rti->total_offset;
-
- image = dts->ground_sprite;
- if (image != SPR_FLAT_GRASS_TILE) image += rti->total_offset;
-
- // adjust ground tile for desert
- // don't adjust for snow, because snow in depots looks weird
- if (IsSnowRailGround(ti->tile) && _opt.landscape == LT_DESERT) {
- if (image != SPR_FLAT_GRASS_TILE) {
- image += rti->snow_offset; // tile with tracks
- } else {
- image = SPR_FLAT_SNOWY_TILE; // flat ground
- }
- }
- } else {
- // look for customization
- byte stat_id = GetWaypointByTile(ti->tile)->stat_id;
- const StationSpec *statspec = GetCustomStationSpec(STAT_CLASS_WAYP, stat_id);
-
- if (statspec != NULL) {
- // emulate station tile - open with building
- const Station* st = ComposeWaypointStation(ti->tile);
- uint gfx = 2;
-
- if (HASBIT(statspec->callbackmask, CBM_CUSTOM_LAYOUT)) {
- uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
- if (callback != CALLBACK_FAILED) gfx = callback;
- }
-
- if (statspec->renderdata == NULL) {
- dts = GetStationTileLayout(gfx);
- } else {
- dts = &statspec->renderdata[(gfx < statspec->tiles ? gfx : 0) + GetWaypointAxis(ti->tile)];
- }
-
- if (dts != NULL && dts->seq != NULL) {
- relocation = GetCustomStationRelocation(statspec, st, ti->tile);
-
- image = dts->ground_sprite;
- if (HASBIT(image, 31)) {
- CLRBIT(image, 31);
- image += GetCustomStationGroundRelocation(statspec, st, ti->tile);
- image += rti->custom_ground_offset;
- } else {
- image += rti->total_offset;
- }
- } else {
- goto default_waypoint;
- }
- } else {
-default_waypoint:
- // There is no custom layout, fall back to the default graphics
- dts = &_waypoint_gfx_table[GetWaypointAxis(ti->tile)];
- relocation = 0;
- image = dts->ground_sprite + rti->total_offset;
- if (IsSnowRailGround(ti->tile)) image += rti->snow_offset;
- }
- }
-
- DrawGroundSprite(image);
-
- if (GetRailType(ti->tile) == RAILTYPE_ELECTRIC) DrawCatenary(ti);
-
- foreach_draw_tile_seq(dtss, dts->seq) {
- uint32 image = dtss->image + relocation;
-
- if (_display_opt & DO_TRANS_BUILDINGS) {
- MAKE_TRANSPARENT(image);
- } else if (image & PALETTE_MODIFIER_COLOR) {
- image |= _drawtile_track_palette;
- }
- AddSortableSpriteToDraw(
- image,
- ti->x + dtss->delta_x, ti->y + dtss->delta_y,
- dtss->size_x, dtss->size_y,
- dtss->size_z, ti->z + dtss->delta_z
- );
- }
- }
- DrawBridgeMiddle(ti);
-}
-
-
-static void DrawTileSequence(int x, int y, uint32 ground, const DrawTileSeqStruct* dtss, uint32 offset)
-{
- uint32 palette = PLAYER_SPRITE_COLOR(_local_player);
-
- DrawSprite(ground, x, y);
- for (; dtss->image != 0; dtss++) {
- Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z);
- uint32 image = dtss->image + offset;
-
- if (image & PALETTE_MODIFIER_COLOR) image |= palette;
- DrawSprite(image, x + pt.x, y + pt.y);
- }
-}
-
-void DrawTrainDepotSprite(int x, int y, int dir, RailType railtype)
-{
- const DrawTileSprites* dts = &_depot_gfx_table[dir];
- uint32 image = dts->ground_sprite;
- uint32 offset = GetRailTypeInfo(railtype)->total_offset;
-
- if (image != SPR_FLAT_GRASS_TILE) image += offset;
- DrawTileSequence(x + 33, y + 17, image, dts->seq, offset);
-}
-
-void DrawDefaultWaypointSprite(int x, int y, RailType railtype)
-{
- uint32 offset = GetRailTypeInfo(railtype)->total_offset;
- const DrawTileSprites* dts = &_waypoint_gfx_table[AXIS_X];
-
- DrawTileSequence(x, y, dts->ground_sprite + offset, dts->seq, 0);
-}
-
-typedef struct SetSignalsData {
- int cur;
- int cur_stack;
- bool stop;
- bool has_presignal;
-
- // presignal info
- int presignal_exits;
- int presignal_exits_free;
-
- // these are used to keep track of the signals that change.
- byte bit[NUM_SSD_ENTRY];
- TileIndex tile[NUM_SSD_ENTRY];
-
- // these are used to keep track of the stack that modifies presignals recursively
- TileIndex next_tile[NUM_SSD_STACK];
- byte next_dir[NUM_SSD_STACK];
-
-} SetSignalsData;
-
-static bool SetSignalsEnumProc(TileIndex tile, void* data, int track, uint length, byte* state)
-{
- SetSignalsData* ssd = data;
-
- if (!IsTileType(tile, MP_RAILWAY)) return false;
-
- // the tile has signals?
- if (HasSignalOnTrack(tile, TrackdirToTrack(track))) {
- if (HasSignalOnTrackdir(tile, ReverseTrackdir(track))) {
- // yes, add the signal to the list of signals
- if (ssd->cur != NUM_SSD_ENTRY) {
- ssd->tile[ssd->cur] = tile; // remember the tile index
- ssd->bit[ssd->cur] = track; // and the controlling bit number
- ssd->cur++;
- }
-
- // remember if this block has a presignal.
- ssd->has_presignal |= IsPresignalEntry(tile);
- }
-
- if (HasSignalOnTrackdir(tile, track) && IsPresignalExit(tile)) {
- // this is an exit signal that points out from the segment
- ssd->presignal_exits++;
- if (GetSignalStateByTrackdir(tile, track) != SIGNAL_STATE_RED)
- ssd->presignal_exits_free++;
- }
-
- return true;
- } else if (IsTileDepotType(tile, TRANSPORT_RAIL)) {
- return true; // don't look further if the tile is a depot
- }
-
- return false;
-}
-
-/* Struct to parse data from VehicleFromPos to SignalVehicleCheckProc */
-typedef struct SignalVehicleCheckStruct {
- TileIndex tile;
- uint track;
-} SignalVehicleCheckStruct;
-
-static void *SignalVehicleCheckProc(Vehicle *v, void *data)
-{
- const SignalVehicleCheckStruct* dest = data;
-
- if (v->type != VEH_Train) return NULL;
-
- /* Wrong tile, or no train? Not a match */
- if (v->tile != dest->tile) return NULL;
-
- /* Are we on the same piece of track? */
- if (dest->track & v->u.rail.track * 0x101) return v;
-
- return NULL;
-}
-
-/* Special check for SetSignalsAfterProc, to see if there is a vehicle on this tile */
-static bool SignalVehicleCheck(TileIndex tile, uint track)
-{
- SignalVehicleCheckStruct dest;
-
- dest.tile = tile;
- dest.track = track;
-
- /* Locate vehicles in tunnels or on bridges */
- if (IsTunnelTile(tile) || IsBridgeTile(tile)) {
- TileIndex end;
- DiagDirection direction;
-
- if (IsTunnelTile(tile)) {
- end = GetOtherTunnelEnd(tile);
- direction = GetTunnelDirection(tile);
- } else {
- end = GetOtherBridgeEnd(tile);
- direction = GetBridgeRampDirection(tile);
- }
-
- dest.track = 1 << (direction & 1); // get the trackbit the vehicle would have if it has not entered the tunnel yet (ie is still visible)
-
- // check for a vehicle with that trackdir on the start tile of the tunnel
- if (VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL) return true;
-
- // check for a vehicle with that trackdir on the end tile of the tunnel
- if (VehicleFromPos(end, &dest, SignalVehicleCheckProc) != NULL) return true;
-
- // now check all tiles from start to end for a warping vehicle
- // NOTE: the hashes for tiles may overlap, so this could maybe be optimised a bit by not checking every tile?
- dest.track = 0x40; //Vehicle inside a tunnel or on a bridge
- for (; tile != end; tile += TileOffsByDiagDir(direction)) {
- if (VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL)
- return true;
- }
-
- // no vehicle found
- return false;
- }
-
- return VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL;
-}
-
-static void SetSignalsAfterProc(TrackPathFinder *tpf)
-{
- SetSignalsData *ssd = tpf->userdata;
- const TrackPathFinderLink* link;
- uint offs;
- uint i;
-
- ssd->stop = false;
-
- /* Go through all the PF tiles */
- for (i = 0; i < lengthof(tpf->hash_head); i++) {
- /* Empty hash item */
- if (tpf->hash_head[i] == 0) continue;
-
- /* If 0x8000 is not set, there is only 1 item */
- if (!(tpf->hash_head[i] & 0x8000)) {
- /* Check if there is a vehicle on this tile */
- if (SignalVehicleCheck(tpf->hash_tile[i], tpf->hash_head[i])) {
- ssd->stop = true;
- return;
- }
- } else {
- /* There are multiple items, where hash_tile points to the first item in the list */
- offs = tpf->hash_tile[i];
- do {
- /* Find the next item */
- link = PATHFIND_GET_LINK_PTR(tpf, offs);
- /* Check if there is a vehicle on this tile */
- if (SignalVehicleCheck(link->tile, link->flags)) {
- ssd->stop = true;
- return;
- }
- /* Goto the next item */
- } while ((offs = link->next) != 0xFFFF);
- }
- }
-}
-
-static const byte _dir_from_track[14] = {
- 0,1,0,1,2,1, 0,0,
- 2,3,3,2,3,0,
-};
-
-
-static void ChangeSignalStates(SetSignalsData *ssd)
-{
- int i;
-
- // thinking about presignals...
- // the presignal is green if,
- // if no train is in the segment AND
- // there is at least one green exit signal OR
- // there are no exit signals in the segment
-
- // then mark the signals in the segment accordingly
- for (i = 0; i != ssd->cur; i++) {
- TileIndex tile = ssd->tile[i];
- byte bit = SignalAgainstTrackdir(ssd->bit[i]);
- uint16 m2 = _m[tile].m2;
-
- // presignals don't turn green if there is at least one presignal exit and none are free
- if (IsPresignalEntry(tile)) {
- int ex = ssd->presignal_exits, exfree = ssd->presignal_exits_free;
-
- // subtract for dual combo signals so they don't count themselves
- if (IsPresignalExit(tile) && HasSignalOnTrackdir(tile, ssd->bit[i])) {
- ex--;
- if (GetSignalStateByTrackdir(tile, ssd->bit[i]) != SIGNAL_STATE_RED) exfree--;
- }
-
- // if we have exits and none are free, make red.
- if (ex && !exfree) goto make_red;
- }
-
- // check if the signal is unaffected.
- if (ssd->stop) {
-make_red:
- // turn red
- if ((bit & m2) == 0) continue;
- } else {
- // turn green
- if ((bit & m2) != 0) continue;
- }
-
- /* Update signals on the other side of this exit-combo signal; it changed. */
- if (IsPresignalExit(tile)) {
- if (ssd->cur_stack != NUM_SSD_STACK) {
- ssd->next_tile[ssd->cur_stack] = tile;
- ssd->next_dir[ssd->cur_stack] = _dir_from_track[ssd->bit[i]];
- ssd->cur_stack++;
- } else {
- DEBUG(misc, 0, "NUM_SSD_STACK too small"); /// @todo WTF is this???
- }
- }
-
- // it changed, so toggle it
- _m[tile].m2 = m2 ^ bit;
- MarkTileDirtyByTile(tile);
- }
-}
-
-
-bool UpdateSignalsOnSegment(TileIndex tile, DiagDirection direction)
-{
- SetSignalsData ssd;
- int result = -1;
-
- ssd.cur_stack = 0;
-
- for (;;) {
- // go through one segment and update all signals pointing into that segment.
- ssd.cur = ssd.presignal_exits = ssd.presignal_exits_free = 0;
- ssd.has_presignal = false;
-
- FollowTrack(tile, 0xC000 | TRANSPORT_RAIL, direction, SetSignalsEnumProc, SetSignalsAfterProc, &ssd);
- ChangeSignalStates(&ssd);
-
- // remember the result only for the first iteration.
- if (result < 0) {
- // stay in depot while segment is occupied or while all presignal exits are blocked
- result = ssd.stop || (ssd.presignal_exits > 0 && ssd.presignal_exits_free == 0);
- }
-
- // if any exit signals were changed, we need to keep going to modify the stuff behind those.
- if (ssd.cur_stack == 0) break;
-
- // one or more exit signals were changed, so we need to update another segment too.
- tile = ssd.next_tile[--ssd.cur_stack];
- direction = ssd.next_dir[ssd.cur_stack];
- }
-
- return result != 0;
-}
-
-void SetSignalsOnBothDir(TileIndex tile, byte track)
-{
- static const DiagDirection _search_dir_1[] = {
- DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_SW, DIAGDIR_SE
- };
- static const DiagDirection _search_dir_2[] = {
- DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NE
- };
-
- UpdateSignalsOnSegment(tile, _search_dir_1[track]);
- UpdateSignalsOnSegment(tile, _search_dir_2[track]);
-}
-
-static uint GetSlopeZ_Track(TileIndex tile, uint x, uint y)
-{
- uint z;
- Slope tileh = GetTileSlope(tile, &z);
-
- if (tileh == SLOPE_FLAT) return z;
- if (IsPlainRailTile(tile)) {
- uint f = GetRailFoundation(tileh, GetTrackBits(tile));
-
- if (f != 0) {
- if (IsSteepSlope(tileh)) {
- z += TILE_HEIGHT;
- } else if (f < 15) {
- return z + TILE_HEIGHT; // leveled foundation
- }
- tileh = _inclined_tileh[f - 15]; // inclined foundation
- }
- return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
- } else {
- return z + TILE_HEIGHT;
- }
-}
-
-static Slope GetSlopeTileh_Track(TileIndex tile, Slope tileh)
-{
- if (tileh == SLOPE_FLAT) return SLOPE_FLAT;
- if (IsPlainRailTile(tile)) {
- uint f = GetRailFoundation(tileh, GetTrackBits(tile));
-
- if (f == 0) return tileh;
- if (f < 15) return SLOPE_FLAT; // leveled foundation
- return _inclined_tileh[f - 15]; // inclined foundation
- } else {
- return SLOPE_FLAT;
- }
-}
-
-static void GetAcceptedCargo_Track(TileIndex tile, AcceptedCargo ac)
-{
- /* not used */
-}
-
-static void AnimateTile_Track(TileIndex tile)
-{
- /* not used */
-}
-
-static void TileLoop_Track(TileIndex tile)
-{
- RailGroundType old_ground = GetRailGroundType(tile);
- RailGroundType new_ground;
-
- switch (_opt.landscape) {
- case LT_HILLY:
- if (GetTileZ(tile) > _opt.snow_line) {
- new_ground = RAIL_GROUND_ICE_DESERT;
- goto set_ground;
- }
- break;
-
- case LT_DESERT:
- if (GetTropicZone(tile) == TROPICZONE_DESERT) {
- new_ground = RAIL_GROUND_ICE_DESERT;
- goto set_ground;
- }
- break;
- }
-
- if (!IsPlainRailTile(tile)) return;
-
- new_ground = RAIL_GROUND_GRASS;
-
- if (old_ground != RAIL_GROUND_BARREN) { /* wait until bottom is green */
- /* determine direction of fence */
- TrackBits rail = GetTrackBits(tile);
-
- switch (rail) {
- case TRACK_BIT_UPPER: new_ground = RAIL_GROUND_FENCE_HORIZ1; break;
- case TRACK_BIT_LOWER: new_ground = RAIL_GROUND_FENCE_HORIZ2; break;
- case TRACK_BIT_LEFT: new_ground = RAIL_GROUND_FENCE_VERT1; break;
- case TRACK_BIT_RIGHT: new_ground = RAIL_GROUND_FENCE_VERT2; break;
-
- default: {
- PlayerID owner = GetTileOwner(tile);
-
- if (rail == (TRACK_BIT_LOWER | TRACK_BIT_RIGHT) || (
- (rail & TRACK_BIT_3WAY_NW) == 0 &&
- (rail & TRACK_BIT_X)
- )) {
- TileIndex n = tile + TileDiffXY(0, -1);
- TrackBits nrail = GetTrackBits(n);
-
- if (!IsTileType(n, MP_RAILWAY) ||
- !IsTileOwner(n, owner) ||
- nrail == TRACK_BIT_UPPER ||
- nrail == TRACK_BIT_LEFT) {
- new_ground = RAIL_GROUND_FENCE_NW;
- }
- }
-
- if (rail == (TRACK_BIT_UPPER | TRACK_BIT_LEFT) || (
- (rail & TRACK_BIT_3WAY_SE) == 0 &&
- (rail & TRACK_BIT_X)
- )) {
- TileIndex n = tile + TileDiffXY(0, 1);
- TrackBits nrail = GetTrackBits(n);
-
- if (!IsTileType(n, MP_RAILWAY) ||
- !IsTileOwner(n, owner) ||
- nrail == TRACK_BIT_LOWER ||
- nrail == TRACK_BIT_RIGHT) {
- new_ground = (new_ground == RAIL_GROUND_FENCE_NW) ?
- RAIL_GROUND_FENCE_SENW : RAIL_GROUND_FENCE_SE;
- }
- }
-
- if (rail == (TRACK_BIT_LOWER | TRACK_BIT_LEFT) || (
- (rail & TRACK_BIT_3WAY_NE) == 0 &&
- (rail & TRACK_BIT_Y)
- )) {
- TileIndex n = tile + TileDiffXY(-1, 0);
- TrackBits nrail = GetTrackBits(n);
-
- if (!IsTileType(n, MP_RAILWAY) ||
- !IsTileOwner(n, owner) ||
- nrail == TRACK_BIT_UPPER ||
- nrail == TRACK_BIT_RIGHT) {
- new_ground = RAIL_GROUND_FENCE_NE;
- }
- }
-
- if (rail == (TRACK_BIT_UPPER | TRACK_BIT_RIGHT) || (
- (rail & TRACK_BIT_3WAY_SW) == 0 &&
- (rail & TRACK_BIT_Y)
- )) {
- TileIndex n = tile + TileDiffXY(1, 0);
- TrackBits nrail = GetTrackBits(n);
-
- if (!IsTileType(n, MP_RAILWAY) ||
- !IsTileOwner(n, owner) ||
- nrail == TRACK_BIT_LOWER ||
- nrail == TRACK_BIT_LEFT) {
- new_ground = (new_ground == RAIL_GROUND_FENCE_NE) ?
- RAIL_GROUND_FENCE_NESW : RAIL_GROUND_FENCE_SW;
- }
- }
- break;
- }
- }
- }
-
-set_ground:
- if (old_ground != new_ground) {
- SetRailGroundType(tile, new_ground);
- MarkTileDirtyByTile(tile);
- }
-}
-
-
-static uint32 GetTileTrackStatus_Track(TileIndex tile, TransportType mode)
-{
- byte a;
- uint16 b;
-
- if (mode != TRANSPORT_RAIL) return 0;
-
- if (IsPlainRailTile(tile)) {
- TrackBits rails = GetTrackBits(tile);
- uint32 ret = rails * 0x101;
-
- if (HasSignals(tile)) {
- a = _m[tile].m3;
- b = _m[tile].m2;
-
- b &= a;
-
- /* When signals are not present (in neither
- * direction), we pretend them to be green. (So if
- * signals are only one way, the other way will
- * implicitely become `red' */
- if ((a & 0xC0) == 0) b |= 0xC0;
- if ((a & 0x30) == 0) b |= 0x30;
-
- if ((b & 0x80) == 0) ret |= 0x10070000;
- if ((b & 0x40) == 0) ret |= 0x07100000;
- if ((b & 0x20) == 0) ret |= 0x20080000;
- if ((b & 0x10) == 0) ret |= 0x08200000;
- } else {
- if (rails == TRACK_BIT_CROSS) ret |= 0x40;
- }
- return ret;
- } else {
- if (GetRailTileSubtype(tile) == RAIL_SUBTYPE_DEPOT) {
- return AxisToTrackBits(DiagDirToAxis(GetRailDepotDirection(tile))) * 0x101;
- } else {
- return GetRailWaypointBits(tile) * 0x101;
- }
- }
-}
-
-static void ClickTile_Track(TileIndex tile)
-{
- if (IsTileDepotType(tile, TRANSPORT_RAIL)) {
- ShowDepotWindow(tile, VEH_Train);
- } else if (IsRailWaypoint(tile)) {
- ShowRenameWaypointWindow(GetWaypointByTile(tile));
- }
-}
-
-static void GetTileDesc_Track(TileIndex tile, TileDesc *td)
-{
- td->owner = GetTileOwner(tile);
- switch (GetRailTileType(tile)) {
- case RAIL_TILE_NORMAL:
- td->str = STR_1021_RAILROAD_TRACK;
- break;
-
- case RAIL_TILE_SIGNALS: {
- const StringID signal_type[] = {
- STR_RAILROAD_TRACK_WITH_NORMAL_SIGNALS,
- STR_RAILROAD_TRACK_WITH_PRESIGNALS,
- STR_RAILROAD_TRACK_WITH_EXITSIGNALS,
- STR_RAILROAD_TRACK_WITH_COMBOSIGNALS
- };
-
- td->str = signal_type[GetSignalType(tile)];
- break;
- }
-
- case RAIL_TILE_DEPOT_WAYPOINT:
- default:
- td->str = (GetRailTileSubtype(tile) == RAIL_SUBTYPE_DEPOT) ?
- STR_1023_RAILROAD_TRAIN_DEPOT : STR_LANDINFO_WAYPOINT;
- break;
- }
-}
-
-static void ChangeTileOwner_Track(TileIndex tile, PlayerID old_player, PlayerID new_player)
-{
- if (!IsTileOwner(tile, old_player)) return;
-
- if (new_player != PLAYER_SPECTATOR) {
- SetTileOwner(tile, new_player);
- } else {
- DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
- }
-}
-
-static const byte _fractcoords_behind[4] = { 0x8F, 0x8, 0x80, 0xF8 };
-static const byte _fractcoords_enter[4] = { 0x8A, 0x48, 0x84, 0xA8 };
-static const byte _deltacoord_leaveoffset[8] = {
- -1, 0, 1, 0, /* x */
- 0, 1, 0, -1 /* y */
-};
-
-static uint32 VehicleEnter_Track(Vehicle *v, TileIndex tile, int x, int y)
-{
- byte fract_coord;
- byte fract_coord_leave;
- DiagDirection dir;
- int length;
-
- // this routine applies only to trains in depot tiles
- if (v->type != VEH_Train || !IsTileDepotType(tile, TRANSPORT_RAIL)) return 0;
-
- /* depot direction */
- dir = GetRailDepotDirection(tile);
-
- /* calculate the point where the following wagon should be activated */
- /* this depends on the length of the current vehicle */
- length = v->u.rail.cached_veh_length;
-
- fract_coord_leave =
- ((_fractcoords_enter[dir] & 0x0F) + // x
- (length + 1) * _deltacoord_leaveoffset[dir]) +
- (((_fractcoords_enter[dir] >> 4) + // y
- ((length + 1) * _deltacoord_leaveoffset[dir+4])) << 4);
-
- fract_coord = (x & 0xF) + ((y & 0xF) << 4);
-
- if (_fractcoords_behind[dir] == fract_coord) {
- /* make sure a train is not entering the tile from behind */
- return 8;
- } else if (_fractcoords_enter[dir] == fract_coord) {
- if (DiagDirToDir(ReverseDiagDir(dir)) == v->direction) {
- /* enter the depot */
- v->u.rail.track = 0x80,
- v->vehstatus |= VS_HIDDEN; /* hide it */
- v->direction = ReverseDir(v->direction);
- if (v->next == NULL) VehicleEnterDepot(v);
- v->tile = tile;
-
- InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
- return 4;
- }
- } else if (fract_coord_leave == fract_coord) {
- if (DiagDirToDir(dir) == v->direction) {
- /* leave the depot? */
- if ((v = v->next) != NULL) {
- v->vehstatus &= ~VS_HIDDEN;
- v->u.rail.track = (DiagDirToAxis(dir) == AXIS_X ? 1 : 2);
- }
- }
- }
-
- return 0;
-}
-
-
-const TileTypeProcs _tile_type_rail_procs = {
- DrawTile_Track, /* draw_tile_proc */
- GetSlopeZ_Track, /* get_slope_z_proc */
- ClearTile_Track, /* clear_tile_proc */
- GetAcceptedCargo_Track, /* get_accepted_cargo_proc */
- GetTileDesc_Track, /* get_tile_desc_proc */
- GetTileTrackStatus_Track, /* get_tile_track_status_proc */
- ClickTile_Track, /* click_tile_proc */
- AnimateTile_Track, /* animate_tile_proc */
- TileLoop_Track, /* tile_loop_clear */
- ChangeTileOwner_Track, /* change_tile_owner_clear */
- NULL, /* get_produced_cargo_proc */
- VehicleEnter_Track, /* vehicle_enter_tile_proc */
- GetSlopeTileh_Track, /* get_slope_tileh_proc */
-};