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OpenTTD-patches/src/rail_cmd.cpp

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/* $Id$ */
/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file rail_cmd.cpp Handling of rail tiles. */
#include "stdafx.h"
#include "cmd_helper.h"
#include "viewport_func.h"
#include "command_func.h"
#include "depot_base.h"
#include "pathfinder/yapf/yapf_cache.h"
#include "newgrf_debug.h"
#include "newgrf_railtype.h"
#include "train.h"
#include "autoslope.h"
#include "water.h"
#include "tunnelbridge_map.h"
#include "window_func.h"
#include "vehicle_func.h"
#include "sound_func.h"
#include "tunnelbridge.h"
#include "functions.h"
#include "elrail_func.h"
#include "town.h"
#include "pbs.h"
#include "company_base.h"
#include "core/backup_type.hpp"
#include "date_func.h"
#include "table/strings.h"
#include "table/railtypes.h"
#include "table/track_land.h"
/** Helper type for lists/vectors of trains */
typedef SmallVector<Train *, 16> TrainList;
RailtypeInfo _railtypes[RAILTYPE_END];
assert_compile(sizeof(_original_railtypes) <= sizeof(_railtypes));
/**
* Initialize rail type information.
*/
void ResetRailTypes()
{
memset(_railtypes, 0, sizeof(_railtypes));
memcpy(_railtypes, _original_railtypes, sizeof(_original_railtypes));
}
void ResolveRailTypeGUISprites(RailtypeInfo *rti)
{
SpriteID cursors_base = GetCustomRailSprite(rti, INVALID_TILE, RTSG_CURSORS);
if (cursors_base != 0) {
rti->gui_sprites.build_ns_rail = cursors_base + 0;
rti->gui_sprites.build_x_rail = cursors_base + 1;
rti->gui_sprites.build_ew_rail = cursors_base + 2;
rti->gui_sprites.build_y_rail = cursors_base + 3;
rti->gui_sprites.auto_rail = cursors_base + 4;
rti->gui_sprites.build_depot = cursors_base + 5;
rti->gui_sprites.build_tunnel = cursors_base + 6;
rti->gui_sprites.convert_rail = cursors_base + 7;
rti->cursor.rail_ns = cursors_base + 8;
rti->cursor.rail_swne = cursors_base + 9;
rti->cursor.rail_ew = cursors_base + 10;
rti->cursor.rail_nwse = cursors_base + 11;
rti->cursor.autorail = cursors_base + 12;
rti->cursor.depot = cursors_base + 13;
rti->cursor.tunnel = cursors_base + 14;
rti->cursor.convert = cursors_base + 15;
}
}
void InitRailTypes()
{
for (RailType rt = RAILTYPE_BEGIN; rt != RAILTYPE_END; rt++) {
RailtypeInfo *rti = &_railtypes[rt];
ResolveRailTypeGUISprites(rti);
}
}
RailType AllocateRailType(RailTypeLabel label)
{
for (RailType rt = RAILTYPE_BEGIN; rt != RAILTYPE_END; rt++) {
RailtypeInfo *rti = &_railtypes[rt];
if (rti->label == 0) {
/* Set up new rail type */
memcpy(rti, &_railtypes[RAILTYPE_RAIL], sizeof(*rti));
rti->label = label;
/* Make us compatible with ourself. */
rti->powered_railtypes = (RailTypes)(1 << rt);
rti->compatible_railtypes = (RailTypes)(1 << rt);
return rt;
}
}
return INVALID_RAILTYPE;
}
static 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
*/
/**
* Tests if a vehicle interacts with the specified track.
* All track bits interact except parallel #TRACK_BIT_HORZ or #TRACK_BIT_VERT.
*
* @param tile The tile.
* @param track The track.
* @return Succeeded command (no train found), or a failed command (a train was found).
*/
static CommandCost EnsureNoTrainOnTrack(TileIndex tile, Track track)
{
TrackBits rail_bits = TrackToTrackBits(track);
return EnsureNoTrainOnTrackBits(tile, rail_bits);
}
/**
* Check that the new track bits may be built.
* @param tile %Tile to build on.
* @param to_build New track bits.
* @param flags Flags of the operation.
* @return Succeeded or failed command.
*/
static CommandCost CheckTrackCombination(TileIndex tile, TrackBits to_build, uint flags)
{
if (!IsPlainRail(tile)) return_cmd_error(STR_ERROR_IMPOSSIBLE_TRACK_COMBINATION);
/* So, we have a tile with tracks on it (and possibly signals). Let's see
* what tracks first */
TrackBits current = GetTrackBits(tile); // The current track layout.
TrackBits future = current | to_build; // The track layout we want to build.
/* Are we really building something new? */
if (current == future) {
/* Nothing new is being built */
return_cmd_error(STR_ERROR_ALREADY_BUILT);
}
/* 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 companies or we have
* signals on the tile), check that */
if (future != TRACK_BIT_HORZ && future != TRACK_BIT_VERT) {
return_cmd_error((flags & DC_NO_RAIL_OVERLAP) ? STR_ERROR_IMPOSSIBLE_TRACK_COMBINATION : STR_ERROR_MUST_REMOVE_SIGNALS_FIRST);
}
}
/* Normally, we may overlap and any combination is valid */
return CommandCost();
}
/** Valid TrackBits on a specific (non-steep)-slope without foundation */
static const TrackBits _valid_tracks_without_foundation[15] = {
TRACK_BIT_ALL,
TRACK_BIT_RIGHT,
TRACK_BIT_UPPER,
TRACK_BIT_X,
TRACK_BIT_LEFT,
TRACK_BIT_NONE,
TRACK_BIT_Y,
TRACK_BIT_LOWER,
TRACK_BIT_LOWER,
TRACK_BIT_Y,
TRACK_BIT_NONE,
TRACK_BIT_LEFT,
TRACK_BIT_X,
TRACK_BIT_UPPER,
TRACK_BIT_RIGHT,
};
/** Valid TrackBits on a specific (non-steep)-slope with leveled foundation */
static const TrackBits _valid_tracks_on_leveled_foundation[15] = {
TRACK_BIT_NONE,
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
};
/**
* Checks if a track combination is valid on a specific slope and returns the needed foundation.
*
* @param tileh Tile slope.
* @param bits Trackbits.
* @return Needed foundation or FOUNDATION_INVALID if track/slope combination is not allowed.
*/
Foundation GetRailFoundation(Slope tileh, TrackBits bits)
{
if (bits == TRACK_BIT_NONE) return FOUNDATION_NONE;
if (IsSteepSlope(tileh)) {
/* Test for inclined foundations */
if (bits == TRACK_BIT_X) return FOUNDATION_INCLINED_X;
if (bits == TRACK_BIT_Y) return FOUNDATION_INCLINED_Y;
/* Get higher track */
Corner highest_corner = GetHighestSlopeCorner(tileh);
TrackBits higher_track = CornerToTrackBits(highest_corner);
/* Only higher track? */
if (bits == higher_track) return HalftileFoundation(highest_corner);
/* Overlap with higher track? */
if (TracksOverlap(bits | higher_track)) return FOUNDATION_INVALID;
/* either lower track or both higher and lower track */
return ((bits & higher_track) != 0 ? FOUNDATION_STEEP_BOTH : FOUNDATION_STEEP_LOWER);
} else {
if ((~_valid_tracks_without_foundation[tileh] & bits) == 0) return FOUNDATION_NONE;
bool valid_on_leveled = ((~_valid_tracks_on_leveled_foundation[tileh] & bits) == 0);
Corner track_corner;
switch (bits) {
case TRACK_BIT_LEFT: track_corner = CORNER_W; break;
case TRACK_BIT_LOWER: track_corner = CORNER_S; break;
case TRACK_BIT_RIGHT: track_corner = CORNER_E; break;
case TRACK_BIT_UPPER: track_corner = CORNER_N; break;
case TRACK_BIT_HORZ:
if (tileh == SLOPE_N) return HalftileFoundation(CORNER_N);
if (tileh == SLOPE_S) return HalftileFoundation(CORNER_S);
return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID);
case TRACK_BIT_VERT:
if (tileh == SLOPE_W) return HalftileFoundation(CORNER_W);
if (tileh == SLOPE_E) return HalftileFoundation(CORNER_E);
return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID);
case TRACK_BIT_X:
if (IsSlopeWithOneCornerRaised(tileh)) return FOUNDATION_INCLINED_X;
return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID);
case TRACK_BIT_Y:
if (IsSlopeWithOneCornerRaised(tileh)) return FOUNDATION_INCLINED_Y;
return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID);
default:
return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID);
}
/* Single diagonal track */
/* Track must be at least valid on leveled foundation */
if (!valid_on_leveled) return FOUNDATION_INVALID;
/* If slope has three raised corners, build leveled foundation */
if (IsSlopeWithThreeCornersRaised(tileh)) return FOUNDATION_LEVELED;
/* If neighboured corners of track_corner are lowered, build halftile foundation */
if ((tileh & SlopeWithThreeCornersRaised(OppositeCorner(track_corner))) == SlopeWithOneCornerRaised(track_corner)) return HalftileFoundation(track_corner);
/* else special anti-zig-zag foundation */
return SpecialRailFoundation(track_corner);
}
}
/**
* Tests if a track can be build on a tile.
*
* @param tileh Tile slope.
* @param rail_bits Tracks to build.
* @param existing Tracks already built.
* @param tile Tile (used for water test)
* @return Error message or cost for foundation building.
*/
static CommandCost CheckRailSlope(Slope tileh, TrackBits rail_bits, TrackBits existing, TileIndex tile)
{
/* don't allow building on the lower side of a coast */
if (GetFloodingBehaviour(tile) != FLOOD_NONE) {
if (!IsSteepSlope(tileh) && ((~_valid_tracks_on_leveled_foundation[tileh] & (rail_bits | existing)) != 0)) return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
}
Foundation f_new = GetRailFoundation(tileh, rail_bits | existing);
/* check track/slope combination */
if ((f_new == FOUNDATION_INVALID) ||
((f_new != FOUNDATION_NONE) && (!_settings_game.construction.build_on_slopes))) {
return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
}
Foundation f_old = GetRailFoundation(tileh, existing);
return CommandCost(EXPENSES_CONSTRUCTION, f_new != f_old ? _price[PR_BUILD_FOUNDATION] : (Money)0);
}
/* 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 flags operation to perform
* @param p1 railtype of being built piece (normal, mono, maglev)
* @param p2 rail track to build
* @param text unused
* @return the cost of this operation or an error
*/
CommandCost CmdBuildSingleRail(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
RailType railtype = Extract<RailType, 0, 4>(p1);
Track track = Extract<Track, 0, 3>(p2);
CommandCost cost(EXPENSES_CONSTRUCTION);
if (!ValParamRailtype(railtype) || !ValParamTrackOrientation(track)) return CMD_ERROR;
Slope tileh = GetTileSlope(tile, NULL);
TrackBits trackbit = TrackToTrackBits(track);
switch (GetTileType(tile)) {
case MP_RAILWAY: {
CommandCost ret = CheckTileOwnership(tile);
if (ret.Failed()) return ret;
if (!IsPlainRail(tile)) return CMD_ERROR;
if (!IsCompatibleRail(GetRailType(tile), railtype)) return_cmd_error(STR_ERROR_IMPOSSIBLE_TRACK_COMBINATION);
ret = CheckTrackCombination(tile, trackbit, flags);
if (ret.Succeeded()) ret = EnsureNoTrainOnTrack(tile, track);
if (ret.Failed()) return ret;
ret = CheckRailSlope(tileh, trackbit, GetTrackBits(tile), tile);
if (ret.Failed()) return ret;
cost.AddCost(ret);
/* If the rail types don't match, try to convert only if engines of
* the new rail type are not powered on the present rail type and engines of
* the present rail type are powered on the new rail type. */
if (GetRailType(tile) != railtype && !HasPowerOnRail(railtype, GetRailType(tile))) {
if (HasPowerOnRail(GetRailType(tile), railtype)) {
ret = DoCommand(tile, tile, railtype, flags, CMD_CONVERT_RAIL);
if (ret.Failed()) return ret;
cost.AddCost(ret);
} else {
return CMD_ERROR;
}
}
if (flags & DC_EXEC) {
SetRailGroundType(tile, RAIL_GROUND_BARREN);
SetTrackBits(tile, GetTrackBits(tile) | trackbit);
}
break;
}
case MP_ROAD: {
/* Level crossings may only be built on these slopes */
if (!HasBit(VALID_LEVEL_CROSSING_SLOPES, tileh)) return_cmd_error(STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
CommandCost ret = EnsureNoVehicleOnGround(tile);
if (ret.Failed()) return ret;
if (IsNormalRoad(tile)) {
if (HasRoadWorks(tile)) return_cmd_error(STR_ERROR_ROAD_WORKS_IN_PROGRESS);
if (GetDisallowedRoadDirections(tile) != DRD_NONE) return_cmd_error(STR_ERROR_CROSSING_ON_ONEWAY_ROAD);
if (RailNoLevelCrossings(railtype)) return_cmd_error(STR_ERROR_CROSSING_DISALLOWED);
RoadTypes roadtypes = GetRoadTypes(tile);
RoadBits road = GetRoadBits(tile, ROADTYPE_ROAD);
RoadBits tram = GetRoadBits(tile, ROADTYPE_TRAM);
switch (roadtypes) {
default: break;
case ROADTYPES_TRAM:
/* Tram crossings must always have road. */
if (flags & DC_EXEC) SetRoadOwner(tile, ROADTYPE_ROAD, _current_company);
roadtypes |= ROADTYPES_ROAD;
break;
case ROADTYPES_ALL:
if (road != tram) return CMD_ERROR;
break;
}
road |= tram;
if ((track == TRACK_X && road == ROAD_Y) ||
(track == TRACK_Y && road == ROAD_X)) {
if (flags & DC_EXEC) {
MakeRoadCrossing(tile, GetRoadOwner(tile, ROADTYPE_ROAD), GetRoadOwner(tile, ROADTYPE_TRAM), _current_company, (track == TRACK_X ? AXIS_Y : AXIS_X), railtype, roadtypes, GetTownIndex(tile));
UpdateLevelCrossing(tile, false);
}
break;
}
}
if (IsLevelCrossing(tile) && GetCrossingRailBits(tile) == trackbit) {
return_cmd_error(STR_ERROR_ALREADY_BUILT);
}
/* FALL THROUGH */
}
default: {
/* Will there be flat water on the lower halftile? */
bool water_ground = IsTileType(tile, MP_WATER) && IsSlopeWithOneCornerRaised(tileh);
CommandCost ret = CheckRailSlope(tileh, trackbit, TRACK_BIT_NONE, tile);
if (ret.Failed()) return ret;
cost.AddCost(ret);
ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
if (ret.Failed()) return ret;
cost.AddCost(ret);
if (water_ground) {
cost.AddCost(-_price[PR_CLEAR_WATER]);
cost.AddCost(_price[PR_CLEAR_ROUGH]);
}
if (flags & DC_EXEC) {
MakeRailNormal(tile, _current_company, trackbit, railtype);
if (water_ground) SetRailGroundType(tile, RAIL_GROUND_WATER);
}
break;
}
}
if (flags & DC_EXEC) {
MarkTileDirtyByTile(tile);
AddTrackToSignalBuffer(tile, track, _current_company);
YapfNotifyTrackLayoutChange(tile, track);
}
cost.AddCost(RailBuildCost(railtype));
return cost;
}
/**
* Remove a single piece of track
* @param tile tile to remove track from
* @param flags operation to perform
* @param p1 unused
* @param p2 rail orientation
* @param text unused
* @return the cost of this operation or an error
*/
CommandCost CmdRemoveSingleRail(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
Track track = Extract<Track, 0, 3>(p2);
CommandCost cost(EXPENSES_CONSTRUCTION);
bool crossing = false;
if (!ValParamTrackOrientation(track)) return CMD_ERROR;
TrackBits trackbit = TrackToTrackBits(track);
/* Need to read tile owner now because it may change when the rail is removed
* Also, in case of floods, _current_company != owner
* There may be invalid tiletype even in exec run (when removing long track),
* so do not call GetTileOwner(tile) in any case here */
Owner owner = INVALID_OWNER;
Train *v = NULL;
switch (GetTileType(tile)) {
case MP_ROAD: {
if (!IsLevelCrossing(tile) || GetCrossingRailBits(tile) != trackbit) return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
if (_current_company != OWNER_WATER) {
CommandCost ret = CheckTileOwnership(tile);
if (ret.Failed()) return ret;
}
if (!(flags & DC_BANKRUPT)) {
CommandCost ret = EnsureNoVehicleOnGround(tile);
if (ret.Failed()) return ret;
}
cost.AddCost(RailClearCost(GetRailType(tile)));
if (flags & DC_EXEC) {
if (HasReservedTracks(tile, trackbit)) {
v = GetTrainForReservation(tile, track);
if (v != NULL) FreeTrainTrackReservation(v);
}
owner = GetTileOwner(tile);
MakeRoadNormal(tile, GetCrossingRoadBits(tile), GetRoadTypes(tile), GetTownIndex(tile), GetRoadOwner(tile, ROADTYPE_ROAD), GetRoadOwner(tile, ROADTYPE_TRAM));
DeleteNewGRFInspectWindow(GSF_RAILTYPES, tile);
}
break;
}
case MP_RAILWAY: {
TrackBits present;
/* There are no rails present at depots. */
if (!IsPlainRail(tile)) return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
if (_current_company != OWNER_WATER) {
CommandCost ret = CheckTileOwnership(tile);
if (ret.Failed()) return ret;
}
CommandCost ret = EnsureNoTrainOnTrack(tile, track);
if (ret.Failed()) return ret;
present = GetTrackBits(tile);
if ((present & trackbit) == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
if (present == (TRACK_BIT_X | TRACK_BIT_Y)) crossing = true;
cost.AddCost(RailClearCost(GetRailType(tile)));
/* Charge extra to remove signals on the track, if they are there */
if (HasSignalOnTrack(tile, track)) {
cost.AddCost(DoCommand(tile, track, 0, flags, CMD_REMOVE_SIGNALS));
}
if (flags & DC_EXEC) {
if (HasReservedTracks(tile, trackbit)) {
v = GetTrainForReservation(tile, track);
if (v != NULL) FreeTrainTrackReservation(v);
}
owner = GetTileOwner(tile);
present ^= trackbit;
if (present == 0) {
Slope tileh = GetTileSlope(tile, NULL);
/* If there is flat water on the lower halftile, convert the tile to shore so the water remains */
if (GetRailGroundType(tile) == RAIL_GROUND_WATER && IsSlopeWithOneCornerRaised(tileh)) {
MakeShore(tile);
} else {
DoClearSquare(tile);
}
DeleteNewGRFInspectWindow(GSF_RAILTYPES, tile);
} else {
SetTrackBits(tile, present);
SetTrackReservation(tile, GetRailReservationTrackBits(tile) & present);
}
}
break;
}
default: return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
}
if (flags & DC_EXEC) {
/* if we got that far, 'owner' variable is set correctly */
assert(Company::IsValidID(owner));
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. */
AddTrackToSignalBuffer(tile, TRACK_X, owner);
AddTrackToSignalBuffer(tile, TRACK_Y, owner);
YapfNotifyTrackLayoutChange(tile, TRACK_X);
YapfNotifyTrackLayoutChange(tile, TRACK_Y);
} else {
AddTrackToSignalBuffer(tile, track, owner);
YapfNotifyTrackLayoutChange(tile, track);
}
if (v != NULL) TryPathReserve(v, true);
}
return cost;
}
/**
* Called from water_cmd if a non-flat rail-tile gets flooded and should be converted to shore.
* The function floods the lower halftile, if the tile has a halftile foundation.
*
* @param t The tile to flood.
* @return true if something was flooded.
*/
bool FloodHalftile(TileIndex t)
{
assert(IsPlainRailTile(t));
bool flooded = false;
if (GetRailGroundType(t) == RAIL_GROUND_WATER) return flooded;
Slope tileh = GetTileSlope(t, NULL);
TrackBits rail_bits = GetTrackBits(t);
if (IsSlopeWithOneCornerRaised(tileh)) {
TrackBits lower_track = CornerToTrackBits(OppositeCorner(GetHighestSlopeCorner(tileh)));
TrackBits to_remove = lower_track & rail_bits;
if (to_remove != 0) {
Backup<CompanyByte> cur_company(_current_company, OWNER_WATER, FILE_LINE);
flooded = DoCommand(t, 0, FIND_FIRST_BIT(to_remove), DC_EXEC, CMD_REMOVE_SINGLE_RAIL).Succeeded();
cur_company.Restore();
if (!flooded) return flooded; // not yet floodable
rail_bits = rail_bits & ~to_remove;
if (rail_bits == 0) {
MakeShore(t);
MarkTileDirtyByTile(t);
return flooded;
}
}
if (IsNonContinuousFoundation(GetRailFoundation(tileh, rail_bits))) {
flooded = true;
SetRailGroundType(t, RAIL_GROUND_WATER);
MarkTileDirtyByTile(t);
}
} else {
/* Make shore on steep slopes and 'three-corners-raised'-slopes. */
if (ApplyFoundationToSlope(GetRailFoundation(tileh, rail_bits), &tileh) == 0) {
if (IsSteepSlope(tileh) || IsSlopeWithThreeCornersRaised(tileh)) {
flooded = true;
SetRailGroundType(t, RAIL_GROUND_WATER);
MarkTileDirtyByTile(t);
}
}
}
return flooded;
}
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 CommandCost ValidateAutoDrag(Trackdir *trackdir, TileIndex start, TileIndex end)
{
int x = TileX(start);
int y = TileY(start);
int ex = TileX(end);
int ey = TileY(end);
if (!ValParamTrackOrientation(TrackdirToTrack(*trackdir))) return CMD_ERROR;
/* calculate delta x,y from start to end tile */
int dx = ex - x;
int dy = ey - y;
/* calculate delta x,y for the first direction */
int trdx = _trackdelta[*trackdir].x;
int 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 CommandCost();
}
/**
* Build or remove a stretch of railroad tracks.
* @param tile start tile of drag
* @param flags operation to perform
* @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
* - p2 = (bit 8) - 0 = build up to an obstacle, 1 = fail if an obstacle is found (used for AIs).
* @param text unused
* @return the cost of this operation or an error
*/
static CommandCost CmdRailTrackHelper(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
CommandCost total_cost(EXPENSES_CONSTRUCTION);
Track track = Extract<Track, 4, 3>(p2);
bool remove = HasBit(p2, 7);
RailType railtype = Extract<RailType, 0, 4>(p2);
if (!ValParamRailtype(railtype) || !ValParamTrackOrientation(track)) return CMD_ERROR;
if (p1 >= MapSize()) return CMD_ERROR;
TileIndex end_tile = p1;
Trackdir trackdir = TrackToTrackdir(track);
CommandCost ret = ValidateAutoDrag(&trackdir, tile, end_tile);
if (ret.Failed()) return ret;
if (flags & DC_EXEC) SndPlayTileFx(SND_20_SPLAT_2, tile);
bool had_success = false;
CommandCost last_error = CMD_ERROR;
for (;;) {
CommandCost ret = DoCommand(tile, railtype, TrackdirToTrack(trackdir), flags, remove ? CMD_REMOVE_SINGLE_RAIL : CMD_BUILD_SINGLE_RAIL);
if (ret.Failed()) {
last_error = ret;
if (last_error.GetErrorMessage() != STR_ERROR_ALREADY_BUILT && !remove) {
if (HasBit(p2, 8)) return last_error;
break;
}
/* Ownership errors are more important. */
if (last_error.GetErrorMessage() == STR_ERROR_OWNED_BY && remove) break;
} else {
had_success = true;
total_cost.AddCost(ret);
}
if (tile == end_tile) break;
tile += ToTileIndexDiff(_trackdelta[trackdir]);
/* toggle railbit for the non-diagonal tracks */
if (!IsDiagonalTrackdir(trackdir)) ToggleBit(trackdir, 0);
}
if (had_success) return total_cost;
return last_error;
}
/**
* Build rail on a stretch of track.
* Stub for the unified rail builder/remover
* @param tile start tile of drag
* @param flags operation to perform
* @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
* @param text unused
* @return the cost of this operation or an error
* @see CmdRailTrackHelper
*/
CommandCost CmdBuildRailroadTrack(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
return CmdRailTrackHelper(tile, flags, p1, ClrBit(p2, 7), text);
}
/**
* Build rail on a stretch of track.
* Stub for the unified rail builder/remover
* @param tile start tile of drag
* @param flags operation to perform
* @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
* @param text unused
* @return the cost of this operation or an error
* @see CmdRailTrackHelper
*/
CommandCost CmdRemoveRailroadTrack(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
return CmdRailTrackHelper(tile, flags, p1, SetBit(p2, 7), text);
}
/**
* Build a train depot
* @param tile position of the train depot
* @param flags operation to perform
* @param p1 rail type
* @param p2 bit 0..1 entrance direction (DiagDirection)
* @param text unused
* @return the cost of this operation or an error
*
* @todo When checking for the tile slope,
* distingush between "Flat land required" and "land sloped in wrong direction"
*/
CommandCost CmdBuildTrainDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
/* check railtype and valid direction for depot (0 through 3), 4 in total */
RailType railtype = Extract<RailType, 0, 4>(p1);
if (!ValParamRailtype(railtype)) return CMD_ERROR;
Slope tileh = GetTileSlope(tile, NULL);
DiagDirection dir = Extract<DiagDirection, 0, 2>(p2);
/* Prohibit construction if
* The tile is non-flat AND
* 1) build-on-slopes is disabled
* 2) the tile is steep i.e. spans two height levels
* 3) the exit points in the wrong direction
*/
if (tileh != SLOPE_FLAT && (
!_settings_game.construction.build_on_slopes ||
IsSteepSlope(tileh) ||
!CanBuildDepotByTileh(dir, tileh)
)) {
return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
}
CommandCost cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
if (cost.Failed()) return cost;
if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
if (!Depot::CanAllocateItem()) return CMD_ERROR;
if (flags & DC_EXEC) {
Depot *d = new Depot(tile);
d->build_date = _date;
MakeRailDepot(tile, _current_company, d->index, dir, railtype);
MarkTileDirtyByTile(tile);
MakeDefaultName(d);
AddSideToSignalBuffer(tile, INVALID_DIAGDIR, _current_company);
YapfNotifyTrackLayoutChange(tile, DiagDirToDiagTrack(dir));
}
cost.AddCost(_price[PR_BUILD_DEPOT_TRAIN]);
cost.AddCost(RailBuildCost(railtype));
return cost;
}
/**
* Build signals, alternate between double/single, signal/semaphore,
* pre/exit/combo-signals, and what-else not. If the rail piece does not
* have any signals, bit 4 (cycle signal-type) is ignored
* @param tile tile where to build the signals
* @param flags operation to perform
* @param p1 various bitstuffed elements
* - p1 = (bit 0-2) - track-orientation, valid values: 0-5 (Track enum)
* - p1 = (bit 3) - 1 = override signal/semaphore, or pre/exit/combo signal or (for bit 7) toggle variant (CTRL-toggle)
* - p1 = (bit 4) - 0 = signals, 1 = semaphores
* - p1 = (bit 5-7) - type of the signal, for valid values see enum SignalType in rail_map.h
* - p1 = (bit 8) - convert the present signal type and variant
* - p1 = (bit 9-11)- start cycle from this signal type
* - p1 = (bit 12-14)-wrap around after this signal type
* - p1 = (bit 15-16)-cycle the signal direction this many times
* - p1 = (bit 17) - 1 = don't modify an existing signal but don't fail either, 0 = always set new signal type
* @param p2 used for CmdBuildManySignals() to copy direction of first signal
* @param text unused
* @return the cost of this operation or an error
* @todo p2 should be replaced by two bits for "along" and "against" the track.
*/
CommandCost CmdBuildSingleSignal(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
Track track = Extract<Track, 0, 3>(p1);
bool ctrl_pressed = HasBit(p1, 3); // was the CTRL button pressed
SignalVariant sigvar = (ctrl_pressed ^ HasBit(p1, 4)) ? SIG_SEMAPHORE : SIG_ELECTRIC; // the signal variant of the new signal
SignalType sigtype = Extract<SignalType, 5, 3>(p1); // the signal type of the new signal
bool convert_signal = HasBit(p1, 8); // convert button pressed
SignalType cycle_start = Extract<SignalType, 9, 3>(p1);
SignalType cycle_stop = Extract<SignalType, 12, 3>(p1);
uint num_dir_cycle = GB(p1, 15, 2);
if (sigtype > SIGTYPE_LAST) return CMD_ERROR;
if (cycle_start > cycle_stop || cycle_stop > SIGTYPE_LAST) return CMD_ERROR;
/* You can only build signals on plain rail tiles, and the selected track must exist */
if (!ValParamTrackOrientation(track) || !IsPlainRailTile(tile) ||
!HasTrack(tile, track)) {
return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
}
CommandCost ret = EnsureNoTrainOnTrack(tile, track);
if (ret.Failed()) return ret;
/* Protect against invalid signal copying */
if (p2 != 0 && (p2 & SignalOnTrack(track)) == 0) return CMD_ERROR;
ret = CheckTileOwnership(tile);
if (ret.Failed()) return ret;
{
/* See if this is a valid track combination for signals, (ie, no overlap) */
TrackBits trackbits = GetTrackBits(tile);
if (KillFirstBit(trackbits) != TRACK_BIT_NONE && // More than one track present
trackbits != TRACK_BIT_HORZ &&
trackbits != TRACK_BIT_VERT) {
return_cmd_error(STR_ERROR_NO_SUITABLE_RAILROAD_TRACK);
}
}
/* In case we don't want to change an existing signal, return without error. */
if (HasBit(p1, 17) && HasSignalOnTrack(tile, track)) return CommandCost();
/* you can not convert a signal if no signal is on track */
if (convert_signal && !HasSignalOnTrack(tile, track)) return_cmd_error(STR_ERROR_THERE_ARE_NO_SIGNALS);
CommandCost cost;
if (!HasSignalOnTrack(tile, track)) {
/* build new signals */
cost = CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_SIGNALS]);
} else {
if (p2 != 0 && sigvar != GetSignalVariant(tile, track)) {
/* convert signals <-> semaphores */
cost = CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_SIGNALS] + _price[PR_CLEAR_SIGNALS]);
} else if (convert_signal) {
/* convert button pressed */
if (ctrl_pressed || GetSignalVariant(tile, track) != sigvar) {
/* convert electric <-> semaphore */
cost = CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_SIGNALS] + _price[PR_CLEAR_SIGNALS]);
} else {
/* it is free to change signal type: normal-pre-exit-combo */
cost = CommandCost();
}
} else {
/* it is free to change orientation/pre-exit-combo signals */
cost = CommandCost();
}
}
if (flags & DC_EXEC) {
Train *v = NULL;
/* The new/changed signal could block our path. As this can lead to
* stale reservations, we clear the path reservation here and try
* to redo it later on. */
if (HasReservedTracks(tile, TrackToTrackBits(track))) {
v = GetTrainForReservation(tile, track);
if (v != NULL) FreeTrainTrackReservation(v);
}
if (!HasSignals(tile)) {
/* there are no signals at all on this tile yet */
SetHasSignals(tile, true);
SetSignalStates(tile, 0xF); // all signals are on
SetPresentSignals(tile, 0); // no signals built by default
SetSignalType(tile, track, sigtype);
SetSignalVariant(tile, track, sigvar);
}
if (p2 == 0) {
if (!HasSignalOnTrack(tile, track)) {
/* build new signals */
SetPresentSignals(tile, GetPresentSignals(tile) | (IsPbsSignal(sigtype) ? KillFirstBit(SignalOnTrack(track)) : SignalOnTrack(track)));
SetSignalType(tile, track, sigtype);
SetSignalVariant(tile, track, sigvar);
while (num_dir_cycle-- > 0) CycleSignalSide(tile, track);
} else {
if (convert_signal) {
/* convert signal button pressed */
if (ctrl_pressed) {
/* toggle the pressent signal variant: SIG_ELECTRIC <-> SIG_SEMAPHORE */
SetSignalVariant(tile, track, (GetSignalVariant(tile, track) == SIG_ELECTRIC) ? SIG_SEMAPHORE : SIG_ELECTRIC);
/* Query current signal type so the check for PBS signals below works. */
sigtype = GetSignalType(tile, track);
} else {
/* convert the present signal to the chosen type and variant */
SetSignalType(tile, track, sigtype);
SetSignalVariant(tile, track, sigvar);
if (IsPbsSignal(sigtype) && (GetPresentSignals(tile) & SignalOnTrack(track)) == SignalOnTrack(track)) {
SetPresentSignals(tile, (GetPresentSignals(tile) & ~SignalOnTrack(track)) | KillFirstBit(SignalOnTrack(track)));
}
}
} else if (ctrl_pressed) {
/* cycle between cycle_start and cycle_end */
sigtype = (SignalType)(GetSignalType(tile, track) + 1);
if (sigtype < cycle_start || sigtype > cycle_stop) sigtype = cycle_start;
SetSignalType(tile, track, sigtype);
if (IsPbsSignal(sigtype) && (GetPresentSignals(tile) & SignalOnTrack(track)) == SignalOnTrack(track)) {
SetPresentSignals(tile, (GetPresentSignals(tile) & ~SignalOnTrack(track)) | KillFirstBit(SignalOnTrack(track)));
}
} else {
/* cycle the signal side: both -> left -> right -> both -> ... */
CycleSignalSide(tile, track);
/* Query current signal type so the check for PBS signals below works. */
sigtype = GetSignalType(tile, track);
}
}
} else {
/* If CmdBuildManySignals is called with copying signals, just copy the
* direction of the first signal given as parameter by CmdBuildManySignals */
SetPresentSignals(tile, (GetPresentSignals(tile) & ~SignalOnTrack(track)) | (p2 & SignalOnTrack(track)));
SetSignalVariant(tile, track, sigvar);
SetSignalType(tile, track, sigtype);
}
if (IsPbsSignal(sigtype)) {
/* PBS signals should show red unless they are on a reservation. */
uint mask = GetPresentSignals(tile) & SignalOnTrack(track);
SetSignalStates(tile, (GetSignalStates(tile) & ~mask) | ((HasBit(GetRailReservationTrackBits(tile), track) ? UINT_MAX : 0) & mask));
}
MarkTileDirtyByTile(tile);
AddTrackToSignalBuffer(tile, track, _current_company);
YapfNotifyTrackLayoutChange(tile, track);
if (v != NULL) {
/* Extend the train's path if it's not stopped or loading, or not at a safe position. */
if (!(((v->vehstatus & VS_STOPPED) && v->cur_speed == 0) || v->current_order.IsType(OT_LOADING)) ||
!IsSafeWaitingPosition(v, v->tile, v->GetVehicleTrackdir(), true, _settings_game.pf.forbid_90_deg)) {
TryPathReserve(v, true);
}
}
}
return cost;
}
static bool CheckSignalAutoFill(TileIndex &tile, Trackdir &trackdir, int &signal_ctr, bool remove)
{
tile = AddTileIndexDiffCWrap(tile, _trackdelta[trackdir]);
if (tile == INVALID_TILE) return false;
/* Check for track bits on the new tile */
TrackdirBits trackdirbits = TrackStatusToTrackdirBits(GetTileTrackStatus(tile, TRANSPORT_RAIL, 0));
if (TracksOverlap(TrackdirBitsToTrackBits(trackdirbits))) return false;
trackdirbits &= TrackdirReachesTrackdirs(trackdir);
/* No track bits, must stop */
if (trackdirbits == TRACKDIR_BIT_NONE) return false;
/* Get the first track dir */
trackdir = RemoveFirstTrackdir(&trackdirbits);
/* Any left? It's a junction so we stop */
if (trackdirbits != TRACKDIR_BIT_NONE) return false;
switch (GetTileType(tile)) {
case MP_RAILWAY:
if (IsRailDepot(tile)) return false;
if (!remove && HasSignalOnTrack(tile, TrackdirToTrack(trackdir))) return false;
signal_ctr++;
if (IsDiagonalTrackdir(trackdir)) {
signal_ctr++;
/* Ensure signal_ctr even so X and Y pieces get signals */
ClrBit(signal_ctr, 0);
}
return true;
case MP_ROAD:
if (!IsLevelCrossing(tile)) return false;
signal_ctr += 2;
return true;
case MP_TUNNELBRIDGE: {
TileIndex orig_tile = tile; // backup old value
if (GetTunnelBridgeTransportType(tile) != TRANSPORT_RAIL) return false;
if (GetTunnelBridgeDirection(tile) != TrackdirToExitdir(trackdir)) return false;
/* Skip to end of tunnel or bridge
* note that tile is a parameter by reference, so it must be updated */
tile = GetOtherTunnelBridgeEnd(tile);
signal_ctr += (GetTunnelBridgeLength(orig_tile, tile) + 2) * 2;
return true;
}
default: return false;
}
}
/**
* Build many signals by dragging; AutoSignals
* @param tile start tile of drag
* @param flags operation to perform
* @param p1 end tile of drag
* @param p2 various bitstuffed elements
* - p2 = (bit 0- 2) - track-orientation, valid values: 0-5 (Track enum)
* - p2 = (bit 3) - 1 = override signal/semaphore, or pre/exit/combo signal (CTRL-toggle)
* - p2 = (bit 4) - 0 = signals, 1 = semaphores
* - p2 = (bit 5) - 0 = build, 1 = remove signals
* - p2 = (bit 6) - 0 = selected stretch, 1 = auto fill
* - p2 = (bit 7- 9) - default signal type
* - p2 = (bit 24-31) - user defined signals_density
* @param text unused
* @return the cost of this operation or an error
*/
static CommandCost CmdSignalTrackHelper(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
CommandCost total_cost(EXPENSES_CONSTRUCTION);
TileIndex start_tile = tile;
Track track = Extract<Track, 0, 3>(p2);
bool mode = HasBit(p2, 3);
bool semaphores = HasBit(p2, 4);
bool remove = HasBit(p2, 5);
bool autofill = HasBit(p2, 6);
byte signal_density = GB(p2, 24, 8);
if (p1 >= MapSize() || !ValParamTrackOrientation(track)) return CMD_ERROR;
TileIndex end_tile = p1;
if (signal_density == 0 || signal_density > 20) return CMD_ERROR;
if (!IsPlainRailTile(tile)) return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
/* for vertical/horizontal tracks, double the given signals density
* since the original amount will be too dense (shorter tracks) */
signal_density *= 2;
Trackdir trackdir = TrackToTrackdir(track);
CommandCost ret = ValidateAutoDrag(&trackdir, tile, end_tile);
if (ret.Failed()) return ret;
track = TrackdirToTrack(trackdir); // trackdir might have changed, keep track in sync
Trackdir start_trackdir = trackdir;
/* Must start on a valid track to be able to avoid loops */
if (!HasTrack(tile, track)) return CMD_ERROR;
SignalType sigtype = (SignalType)GB(p2, 7, 3);
if (sigtype > SIGTYPE_LAST) return CMD_ERROR;
byte signals;
/* copy the signal-style of the first rail-piece if existing */
if (HasSignalOnTrack(tile, track)) {
signals = GetPresentSignals(tile) & SignalOnTrack(track);
assert(signals != 0);
/* copy signal/semaphores style (independent of CTRL) */
semaphores = GetSignalVariant(tile, track) != SIG_ELECTRIC;
sigtype = GetSignalType(tile, track);
/* Don't but copy pre-signal type */
if (sigtype < SIGTYPE_PBS) sigtype = SIGTYPE_NORMAL;
} else { // no signals exist, drag a two-way signal stretch
signals = IsPbsSignal(sigtype) ? SignalAlongTrackdir(trackdir) : SignalOnTrack(track);
}
byte signal_dir = 0;
if (signals & SignalAlongTrackdir(trackdir)) SetBit(signal_dir, 0);
if (signals & SignalAgainstTrackdir(trackdir)) SetBit(signal_dir, 1);
/* signal_ctr - amount of tiles already processed
* signals_density - 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
* remove - 1 remove signals, 0 build signals */
int signal_ctr = 0;
CommandCost last_error = CMD_ERROR;
bool had_success = false;
for (;;) {
/* only build/remove signals with the specified density */
if ((remove && autofill) || signal_ctr % signal_density == 0) {
uint32 p1 = GB(TrackdirToTrack(trackdir), 0, 3);
SB(p1, 3, 1, mode);
SB(p1, 4, 1, semaphores);
SB(p1, 5, 3, sigtype);
if (!remove && signal_ctr == 0) SetBit(p1, 17);
/* Pick the correct orientation for the track direction */
signals = 0;
if (HasBit(signal_dir, 0)) signals |= SignalAlongTrackdir(trackdir);
if (HasBit(signal_dir, 1)) signals |= SignalAgainstTrackdir(trackdir);
CommandCost ret = DoCommand(tile, p1, signals, flags, remove ? CMD_REMOVE_SIGNALS : CMD_BUILD_SIGNALS);
/* Be user-friendly and try placing signals as much as possible */
if (ret.Succeeded()) {
had_success = true;
total_cost.AddCost(ret);
} else {
/* The "No railway" error is the least important one. */
if (ret.GetErrorMessage() != STR_ERROR_THERE_IS_NO_RAILROAD_TRACK ||
last_error.GetErrorMessage() == INVALID_STRING_ID) {
last_error = ret;
}
}
}
if (autofill) {
if (!CheckSignalAutoFill(tile, trackdir, signal_ctr, remove)) break;
/* Prevent possible loops */
if (tile == start_tile && trackdir == start_trackdir) break;
} else {
if (tile == end_tile) break;
tile += ToTileIndexDiff(_trackdelta[trackdir]);
signal_ctr++;
/* toggle railbit for the non-diagonal tracks (|, -- tracks) */
if (IsDiagonalTrackdir(trackdir)) {
signal_ctr++;
} else {
ToggleBit(trackdir, 0);
}
}
}
return had_success ? total_cost : last_error;
}
/**
* Build signals on a stretch of track.
* Stub for the unified signal builder/remover
* @param tile start tile of drag
* @param flags operation to perform
* @param p1 end tile of drag
* @param p2 various bitstuffed elements
* - p2 = (bit 0- 2) - track-orientation, valid values: 0-5 (Track enum)
* - p2 = (bit 3) - 1 = override signal/semaphore, or pre/exit/combo signal (CTRL-toggle)
* - p2 = (bit 4) - 0 = signals, 1 = semaphores
* - p2 = (bit 5) - 0 = build, 1 = remove signals
* - p2 = (bit 6) - 0 = selected stretch, 1 = auto fill
* - p2 = (bit 7- 9) - default signal type
* - p2 = (bit 24-31) - user defined signals_density
* @param text unused
* @return the cost of this operation or an error
* @see CmdSignalTrackHelper
*/
CommandCost CmdBuildSignalTrack(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
return CmdSignalTrackHelper(tile, flags, p1, p2, text);
}
/**
* Remove signals
* @param tile coordinates where signal is being deleted from
* @param flags operation to perform
* @param p1 various bitstuffed elements, only track information is used
* - (bit 0- 2) - track-orientation, valid values: 0-5 (Track enum)
* - (bit 3) - override signal/semaphore, or pre/exit/combo signal (CTRL-toggle)
* - (bit 4) - 0 = signals, 1 = semaphores
* @param p2 unused
* @param text unused
* @return the cost of this operation or an error
*/
CommandCost CmdRemoveSingleSignal(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
Track track = Extract<Track, 0, 3>(p1);
if (!ValParamTrackOrientation(track) || !IsPlainRailTile(tile) || !HasTrack(tile, track)) {
return_cmd_error(STR_ERROR_THERE_IS_NO_RAILROAD_TRACK);
}
if (!HasSignalOnTrack(tile, track)) {
return_cmd_error(STR_ERROR_THERE_ARE_NO_SIGNALS);
}
CommandCost ret = EnsureNoTrainOnTrack(tile, track);
if (ret.Failed()) return ret;
/* Only water can remove signals from anyone */
if (_current_company != OWNER_WATER) {
CommandCost ret = CheckTileOwnership(tile);
if (ret.Failed()) return ret;
}
/* Do it? */
if (flags & DC_EXEC) {
Train *v = NULL;
if (HasReservedTracks(tile, TrackToTrackBits(track))) {
v = GetTrainForReservation(tile, track);
} else if (IsPbsSignal(GetSignalType(tile, track))) {
/* PBS signal, might be the end of a path reservation. */
Trackdir td = TrackToTrackdir(track);
for (int i = 0; v == NULL && i < 2; i++, td = ReverseTrackdir(td)) {
/* Only test the active signal side. */
if (!HasSignalOnTrackdir(tile, ReverseTrackdir(td))) continue;
TileIndex next = TileAddByDiagDir(tile, TrackdirToExitdir(td));
TrackBits tracks = TrackdirBitsToTrackBits(TrackdirReachesTrackdirs(td));
if (HasReservedTracks(next, tracks)) {
v = GetTrainForReservation(next, TrackBitsToTrack(GetReservedTrackbits(next) & tracks));
}
}
}
SetPresentSignals(tile, GetPresentSignals(tile) & ~SignalOnTrack(track));
/* removed last signal from tile? */
if (GetPresentSignals(tile) == 0) {
SetSignalStates(tile, 0);
SetHasSignals(tile, false);
SetSignalVariant(tile, INVALID_TRACK, SIG_ELECTRIC); // remove any possible semaphores
}
AddTrackToSignalBuffer(tile, track, GetTileOwner(tile));
YapfNotifyTrackLayoutChange(tile, track);
if (v != NULL) TryPathReserve(v, false);
MarkTileDirtyByTile(tile);
}
return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_SIGNALS]);
}
/**
* Remove signals on a stretch of track.
* Stub for the unified signal builder/remover
* @param tile start tile of drag
* @param flags operation to perform
* @param p1 end tile of drag
* @param p2 various bitstuffed elements
* - p2 = (bit 0- 2) - track-orientation, valid values: 0-5 (Track enum)
* - p2 = (bit 3) - 1 = override signal/semaphore, or pre/exit/combo signal (CTRL-toggle)
* - p2 = (bit 4) - 0 = signals, 1 = semaphores
* - p2 = (bit 5) - 0 = build, 1 = remove signals
* - p2 = (bit 6) - 0 = selected stretch, 1 = auto fill
* - p2 = (bit 7- 9) - default signal type
* - p2 = (bit 24-31) - user defined signals_density
* @param text unused
* @return the cost of this operation or an error
* @see CmdSignalTrackHelper
*/
CommandCost CmdRemoveSignalTrack(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
return CmdSignalTrackHelper(tile, flags, p1, SetBit(p2, 5), text); // bit 5 is remove bit
}
/** Update power of train under which is the railtype being converted */
static Vehicle *UpdateTrainPowerProc(Vehicle *v, void *data)
{
if (v->type != VEH_TRAIN) return NULL;
TrainList *affected_trains = static_cast<TrainList*>(data);
affected_trains->Include(Train::From(v)->First());
return NULL;
}
/**
* 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 flags operation to perform
* @param p1 start tile of drag
* @param p2 new railtype to convert to
* @param text unused
* @return the cost of this operation or an error
*/
CommandCost CmdConvertRail(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
RailType totype = Extract<RailType, 0, 4>(p2);
if (!ValParamRailtype(totype)) return CMD_ERROR;
if (p1 >= MapSize()) return CMD_ERROR;
TrainList affected_trains;
CommandCost cost(EXPENSES_CONSTRUCTION);
CommandCost error = CommandCost(STR_ERROR_NO_SUITABLE_RAILROAD_TRACK); // by default, there is no track to convert.
TileArea ta(tile, p1);
TILE_AREA_LOOP(tile, ta) {
TileType tt = GetTileType(tile);
/* Check if there is any track on tile */
switch (tt) {
case MP_RAILWAY:
break;
case MP_STATION:
if (!HasStationRail(tile)) continue;
break;
case MP_ROAD:
if (!IsLevelCrossing(tile)) continue;
if (RailNoLevelCrossings(totype)) {
error.MakeError(STR_ERROR_CROSSING_DISALLOWED);
continue;
}
break;
case MP_TUNNELBRIDGE:
if (GetTunnelBridgeTransportType(tile) != TRANSPORT_RAIL) continue;
break;
default: continue;
}
/* Original railtype we are converting from */
RailType type = GetRailType(tile);
/* Converting to the same type or converting 'hidden' elrail -> rail */
if (type == totype || (_settings_game.vehicle.disable_elrails && totype == RAILTYPE_RAIL && type == RAILTYPE_ELECTRIC)) continue;
/* Trying to convert other's rail */
CommandCost ret = CheckTileOwnership(tile);
if (ret.Failed()) {
error = ret;
continue;
}
SmallVector<Train *, 2> vehicles_affected;
/* Vehicle on the tile when not converting Rail <-> ElRail
* Tunnels and bridges have special check later */
if (tt != MP_TUNNELBRIDGE) {
if (!IsCompatibleRail(type, totype)) {
CommandCost ret = EnsureNoVehicleOnGround(tile);
if (ret.Failed()) {
error = ret;
continue;
}
}
if (flags & DC_EXEC) { // we can safely convert, too
TrackBits reserved = GetReservedTrackbits(tile);
Track track;
while ((track = RemoveFirstTrack(&reserved)) != INVALID_TRACK) {
Train *v = GetTrainForReservation(tile, track);
if (v != NULL && !HasPowerOnRail(v->railtype, totype)) {
/* No power on new rail type, reroute. */
FreeTrainTrackReservation(v);
*vehicles_affected.Append() = v;
}
}
SetRailType(tile, totype);
MarkTileDirtyByTile(tile);
/* update power of train on this tile */
FindVehicleOnPos(tile, &affected_trains, &UpdateTrainPowerProc);
}
}
switch (tt) {
case MP_RAILWAY:
switch (GetRailTileType(tile)) {
case RAIL_TILE_DEPOT:
if (flags & DC_EXEC) {
/* notify YAPF about the track layout change */
YapfNotifyTrackLayoutChange(tile, GetRailDepotTrack(tile));
/* Update build vehicle window related to this depot */
InvalidateWindowData(WC_VEHICLE_DEPOT, tile);
InvalidateWindowData(WC_BUILD_VEHICLE, tile);
}
cost.AddCost(RailConvertCost(type, totype));
break;
default: // RAIL_TILE_NORMAL, RAIL_TILE_SIGNALS
if (flags & DC_EXEC) {
/* notify YAPF about the track layout change */
TrackBits tracks = GetTrackBits(tile);
while (tracks != TRACK_BIT_NONE) {
YapfNotifyTrackLayoutChange(tile, RemoveFirstTrack(&tracks));
}
}
cost.AddCost(RailConvertCost(type, totype) * CountBits(GetTrackBits(tile)));
break;
}
break;
case MP_TUNNELBRIDGE: {
TileIndex endtile = GetOtherTunnelBridgeEnd(tile);
/* If both ends of tunnel/bridge are in the range, do not try to convert twice -
* it would cause assert because of different test and exec runs */
if (endtile < tile && TileX(endtile) >= TileX(ta.tile) && TileX(endtile) < TileX(ta.tile) + ta.w &&
TileY(endtile) >= TileY(ta.tile) && TileY(endtile) < TileY(ta.tile) + ta.h) continue;
/* When not coverting rail <-> el. rail, any vehicle cannot be in tunnel/bridge */
if (!IsCompatibleRail(GetRailType(tile), totype)) {
CommandCost ret = TunnelBridgeIsFree(tile, endtile);
if (ret.Failed()) {
error = ret;
continue;
}
}
if (flags & DC_EXEC) {
Track track = DiagDirToDiagTrack(GetTunnelBridgeDirection(tile));
if (HasTunnelBridgeReservation(tile)) {
Train *v = GetTrainForReservation(tile, track);
if (v != NULL && !HasPowerOnRail(v->railtype, totype)) {
/* No power on new rail type, reroute. */
FreeTrainTrackReservation(v);
*vehicles_affected.Append() = v;
}
}
SetRailType(tile, totype);
SetRailType(endtile, totype);
FindVehicleOnPos(tile, &affected_trains, &UpdateTrainPowerProc);
FindVehicleOnPos(endtile, &affected_trains, &UpdateTrainPowerProc);
YapfNotifyTrackLayoutChange(tile, track);
YapfNotifyTrackLayoutChange(endtile, track);
MarkTileDirtyByTile(tile);
MarkTileDirtyByTile(endtile);
if (IsBridge(tile)) {
TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
TileIndex t = tile + delta;
for (; t != endtile; t += delta) MarkTileDirtyByTile(t); // TODO encapsulate this into a function
}
}
cost.AddCost((GetTunnelBridgeLength(tile, endtile) + 2) * RailConvertCost(type, totype));
break;
}
default: // MP_STATION, MP_ROAD
if (flags & DC_EXEC) {
Track track = ((tt == MP_STATION) ? GetRailStationTrack(tile) : GetCrossingRailTrack(tile));
YapfNotifyTrackLayoutChange(tile, track);
}
cost.AddCost(RailConvertCost(type, totype));
break;
}
for (uint i = 0; i < vehicles_affected.Length(); ++i) {
TryPathReserve(vehicles_affected[i], true);
}
}
if (flags & DC_EXEC) {
/* Railtype changed, update trains as when entering different track */
for (Train **v = affected_trains.Begin(); v != affected_trains.End(); v++) {
(*v)->RailtypeChanged();
}
}
return (cost.GetCost() == 0) ? error : cost;
}
static CommandCost RemoveTrainDepot(TileIndex tile, DoCommandFlag flags)
{
if (_current_company != OWNER_WATER) {
CommandCost ret = CheckTileOwnership(tile);
if (ret.Failed()) return ret;
}
CommandCost ret = EnsureNoVehicleOnGround(tile);
if (ret.Failed()) return ret;
if (flags & DC_EXEC) {
/* read variables before the depot is removed */
DiagDirection dir = GetRailDepotDirection(tile);
Owner owner = GetTileOwner(tile);
Train *v = NULL;
if (HasDepotReservation(tile)) {
v = GetTrainForReservation(tile, DiagDirToDiagTrack(dir));
if (v != NULL) FreeTrainTrackReservation(v);
}
delete Depot::GetByTile(tile);
DoClearSquare(tile);
AddSideToSignalBuffer(tile, dir, owner);
YapfNotifyTrackLayoutChange(tile, DiagDirToDiagTrack(dir));
if (v != NULL) TryPathReserve(v, true);
}
return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_DEPOT_TRAIN]);
}
static CommandCost ClearTile_Track(TileIndex tile, DoCommandFlag flags)
{
CommandCost cost(EXPENSES_CONSTRUCTION);
if (flags & DC_AUTO) {
if (!IsTileOwner(tile, _current_company)) {
return_cmd_error(STR_ERROR_AREA_IS_OWNED_BY_ANOTHER);
}
if (IsPlainRail(tile)) {
return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
} else {
return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
}
}
switch (GetRailTileType(tile)) {
case RAIL_TILE_SIGNALS:
case RAIL_TILE_NORMAL: {
Slope tileh = GetTileSlope(tile, NULL);
/* Is there flat water on the lower halftile that gets cleared expensively? */
bool water_ground = (GetRailGroundType(tile) == RAIL_GROUND_WATER && IsSlopeWithOneCornerRaised(tileh));
TrackBits tracks = GetTrackBits(tile);
while (tracks != TRACK_BIT_NONE) {
Track track = RemoveFirstTrack(&tracks);
CommandCost ret = DoCommand(tile, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
if (ret.Failed()) return ret;
cost.AddCost(ret);
}
/* when bankrupting, don't make water dirty, there could be a ship on lower halftile */
if (water_ground && !(flags & DC_BANKRUPT)) {
CommandCost ret = EnsureNoVehicleOnGround(tile);
if (ret.Failed()) return ret;
/* The track was removed, and left a coast tile. Now also clear the water. */
if (flags & DC_EXEC) DoClearSquare(tile);
cost.AddCost(_price[PR_CLEAR_WATER]);
}
return cost;
}
case RAIL_TILE_DEPOT:
return RemoveTrainDepot(tile, flags);
default:
return CMD_ERROR;
}
}
/**
* Get surface height in point (x,y)
* On tiles with halftile foundations move (x,y) to a safe point wrt. track
*/
static uint GetSaveSlopeZ(uint x, uint y, Track track)
{
switch (track) {
case TRACK_UPPER: x &= ~0xF; y &= ~0xF; break;
case TRACK_LOWER: x |= 0xF; y |= 0xF; break;
case TRACK_LEFT: x |= 0xF; y &= ~0xF; break;
case TRACK_RIGHT: x &= ~0xF; y |= 0xF; break;
default: break;
}
return GetSlopeZ(x, y);
}
static void DrawSingleSignal(TileIndex tile, Track track, byte condition, uint image, uint pos)
{
bool side = (_settings_game.vehicle.road_side != 0) && _settings_game.construction.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}
}
};
uint x = TileX(tile) * TILE_SIZE + SignalPositions[side][pos].x;
uint y = TileY(tile) * TILE_SIZE + SignalPositions[side][pos].y;
SpriteID sprite;
SignalType type = GetSignalType(tile, track);
SignalVariant variant = GetSignalVariant(tile, track);
if (type == SIGTYPE_NORMAL && variant == SIG_ELECTRIC) {
/* Normal electric signals are picked from original sprites. */
sprite = SPR_ORIGINAL_SIGNALS_BASE + image + condition;
} else {
/* All other signals are picked from add on sprites. */
sprite = SPR_SIGNALS_BASE + (type - 1) * 16 + variant * 64 + image + condition + (type > SIGTYPE_LAST_NOPBS ? 64 : 0);
}
AddSortableSpriteToDraw(sprite, PAL_NONE, x, y, 1, 1, BB_HEIGHT_UNDER_BRIDGE, GetSaveSlopeZ(x, y, track));
}
static uint32 _drawtile_track_palette;
static void DrawTrackFence_NW(const TileInfo *ti, SpriteID base_image)
{
RailFenceOffset rfo = RFO_FLAT_X;
if (ti->tileh != SLOPE_FLAT) rfo = (ti->tileh & SLOPE_S) ? RFO_SLOPE_SW : RFO_SLOPE_NE;
AddSortableSpriteToDraw(base_image + rfo, _drawtile_track_palette,
ti->x, ti->y + 1, 16, 1, 4, ti->z);
}
static void DrawTrackFence_SE(const TileInfo *ti, SpriteID base_image)
{
RailFenceOffset rfo = RFO_FLAT_X;
if (ti->tileh != SLOPE_FLAT) rfo = (ti->tileh & SLOPE_S) ? RFO_SLOPE_SW : RFO_SLOPE_NE;
AddSortableSpriteToDraw(base_image + rfo, _drawtile_track_palette,
ti->x, ti->y + TILE_SIZE - 1, 16, 1, 4, ti->z);
}
static void DrawTrackFence_NW_SE(const TileInfo *ti, SpriteID base_image)
{
DrawTrackFence_NW(ti, base_image);
DrawTrackFence_SE(ti, base_image);
}
static void DrawTrackFence_NE(const TileInfo *ti, SpriteID base_image)
{
RailFenceOffset rfo = RFO_FLAT_Y;
if (ti->tileh != SLOPE_FLAT) rfo = (ti->tileh & SLOPE_S) ? RFO_SLOPE_SE : RFO_SLOPE_NW;
AddSortableSpriteToDraw(base_image + rfo, _drawtile_track_palette,
ti->x + 1, ti->y, 1, 16, 4, ti->z);
}
static void DrawTrackFence_SW(const TileInfo *ti, SpriteID base_image)
{
RailFenceOffset rfo = RFO_FLAT_Y;
if (ti->tileh != SLOPE_FLAT) rfo = (ti->tileh & SLOPE_S) ? RFO_SLOPE_SE : RFO_SLOPE_NW;
AddSortableSpriteToDraw(base_image + rfo, _drawtile_track_palette,
ti->x + TILE_SIZE - 1, ti->y, 1, 16, 4, ti->z);
}
static void DrawTrackFence_NE_SW(const TileInfo *ti, SpriteID base_image)
{
DrawTrackFence_NE(ti, base_image);
DrawTrackFence_SW(ti, base_image);
}
/**
* Draw fence at eastern side of track.
*/
static void DrawTrackFence_NS_1(const TileInfo *ti, SpriteID base_image)
{
uint z = ti->z + GetSlopeZInCorner(RemoveHalftileSlope(ti->tileh), CORNER_W);
AddSortableSpriteToDraw(base_image + RFO_FLAT_VERT, _drawtile_track_palette,
ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
}
/**
* Draw fence at western side of track.
*/
static void DrawTrackFence_NS_2(const TileInfo *ti, SpriteID base_image)
{
uint z = ti->z + GetSlopeZInCorner(RemoveHalftileSlope(ti->tileh), CORNER_E);
AddSortableSpriteToDraw(base_image + RFO_FLAT_VERT, _drawtile_track_palette,
ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
}
/**
* Draw fence at southern side of track.
*/
static void DrawTrackFence_WE_1(const TileInfo *ti, SpriteID base_image)
{
uint z = ti->z + GetSlopeZInCorner(RemoveHalftileSlope(ti->tileh), CORNER_N);
AddSortableSpriteToDraw(base_image + RFO_FLAT_HORZ, _drawtile_track_palette,
ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
}
/**
* Draw fence at northern side of track.
*/
static void DrawTrackFence_WE_2(const TileInfo *ti, SpriteID base_image)
{
uint z = ti->z + GetSlopeZInCorner(RemoveHalftileSlope(ti->tileh), CORNER_S);
AddSortableSpriteToDraw(base_image + RFO_FLAT_HORZ, _drawtile_track_palette,
ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
}
static void DrawTrackDetails(const TileInfo *ti, const RailtypeInfo *rti)
{
/* Base sprite for track fences.
* Note: Halftile slopes only have fences on the upper part. */
SpriteID base_image = GetCustomRailSprite(rti, ti->tile, RTSG_FENCES, IsHalftileSlope(ti->tileh) ? TCX_UPPER_HALFTILE : TCX_NORMAL);
if (base_image == 0) base_image = SPR_TRACK_FENCE_FLAT_X;
switch (GetRailGroundType(ti->tile)) {
case RAIL_GROUND_FENCE_NW: DrawTrackFence_NW(ti, base_image); break;
case RAIL_GROUND_FENCE_SE: DrawTrackFence_SE(ti, base_image); break;
case RAIL_GROUND_FENCE_SENW: DrawTrackFence_NW_SE(ti, base_image); break;
case RAIL_GROUND_FENCE_NE: DrawTrackFence_NE(ti, base_image); break;
case RAIL_GROUND_FENCE_SW: DrawTrackFence_SW(ti, base_image); break;
case RAIL_GROUND_FENCE_NESW: DrawTrackFence_NE_SW(ti, base_image); break;
case RAIL_GROUND_FENCE_VERT1: DrawTrackFence_NS_1(ti, base_image); break;
case RAIL_GROUND_FENCE_VERT2: DrawTrackFence_NS_2(ti, base_image); break;
case RAIL_GROUND_FENCE_HORIZ1: DrawTrackFence_WE_1(ti, base_image); break;
case RAIL_GROUND_FENCE_HORIZ2: DrawTrackFence_WE_2(ti, base_image); break;
case RAIL_GROUND_WATER: {
Corner track_corner;
if (IsHalftileSlope(ti->tileh)) {
/* Steep slope or one-corner-raised slope with halftile foundation */
track_corner = GetHalftileSlopeCorner(ti->tileh);
} else {
/* Three-corner-raised slope */
track_corner = OppositeCorner(GetHighestSlopeCorner(ComplementSlope(ti->tileh)));
}
switch (track_corner) {
case CORNER_W: DrawTrackFence_NS_1(ti, base_image); break;
case CORNER_S: DrawTrackFence_WE_2(ti, base_image); break;
case CORNER_E: DrawTrackFence_NS_2(ti, base_image); break;
case CORNER_N: DrawTrackFence_WE_1(ti, base_image); break;
default: NOT_REACHED();
}
break;
}
default: break;
}
}
/* SubSprite for drawing the track halftile of 'three-corners-raised'-sloped rail sprites. */
static const int INF = 1000; // big number compared to tilesprite size
static const SubSprite _halftile_sub_sprite[4] = {
{ -INF , -INF , 32 - 33, INF }, // CORNER_W, clip 33 pixels from right
{ -INF , 0 + 7, INF , INF }, // CORNER_S, clip 7 pixels from top
{ -31 + 33, -INF , INF , INF }, // CORNER_E, clip 33 pixels from left
{ -INF , -INF , INF , 30 - 23 } // CORNER_N, clip 23 pixels from bottom
};
static inline void DrawTrackSprite(SpriteID sprite, PaletteID pal, const TileInfo *ti, Slope s)
{
DrawGroundSprite(sprite, pal, NULL, 0, (ti->tileh & s) ? -8 : 0);
}
static void DrawTrackBitsOverlay(TileInfo *ti, TrackBits track, const RailtypeInfo *rti)
{
RailGroundType rgt = GetRailGroundType(ti->tile);
Foundation f = GetRailFoundation(ti->tileh, track);
Corner halftile_corner = CORNER_INVALID;
if (IsNonContinuousFoundation(f)) {
/* Save halftile corner */
halftile_corner = (f == FOUNDATION_STEEP_BOTH ? GetHighestSlopeCorner(ti->tileh) : GetHalftileFoundationCorner(f));
/* Draw lower part first */
track &= ~CornerToTrackBits(halftile_corner);
f = (f == FOUNDATION_STEEP_BOTH ? FOUNDATION_STEEP_LOWER : FOUNDATION_NONE);
}
DrawFoundation(ti, f);
/* DrawFoundation modifies ti */
/* Draw ground */
if (rgt == RAIL_GROUND_WATER) {
if (track != TRACK_BIT_NONE || IsSteepSlope(ti->tileh)) {
/* three-corner-raised slope or steep slope with track on upper part */
DrawShoreTile(ti->tileh);
} else {
/* single-corner-raised slope with track on upper part */
DrawGroundSprite(SPR_FLAT_WATER_TILE, PAL_NONE);
}
} else {
SpriteID image;
switch (rgt) {
case RAIL_GROUND_BARREN: image = SPR_FLAT_BARE_LAND; break;
case RAIL_GROUND_ICE_DESERT: image = SPR_FLAT_SNOW_DESERT_TILE; break;
default: image = SPR_FLAT_GRASS_TILE; break;
}
image += SlopeToSpriteOffset(ti->tileh);
DrawGroundSprite(image, PAL_NONE);
}
SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
TrackBits pbs = _settings_client.gui.show_track_reservation ? GetRailReservationTrackBits(ti->tile) : TRACK_BIT_NONE;
if (track == TRACK_BIT_NONE) {
/* Half-tile foundation, no track here? */
} else if (ti->tileh == SLOPE_NW && track == TRACK_BIT_Y) {
DrawGroundSprite(ground + RTO_SLOPE_NW, PAL_NONE);
if (pbs != TRACK_BIT_NONE) DrawGroundSprite(overlay + 9, PALETTE_CRASH);
} else if (ti->tileh == SLOPE_NE && track == TRACK_BIT_X) {
DrawGroundSprite(ground + RTO_SLOPE_NE, PAL_NONE);
if (pbs != TRACK_BIT_NONE) DrawGroundSprite(overlay + 6, PALETTE_CRASH);
} else if (ti->tileh == SLOPE_SE && track == TRACK_BIT_Y) {
DrawGroundSprite(ground + RTO_SLOPE_SE, PAL_NONE);
if (pbs != TRACK_BIT_NONE) DrawGroundSprite(overlay + 7, PALETTE_CRASH);
} else if (ti->tileh == SLOPE_SW && track == TRACK_BIT_X) {
DrawGroundSprite(ground + RTO_SLOPE_SW, PAL_NONE);
if (pbs != TRACK_BIT_NONE) DrawGroundSprite(overlay + 8, PALETTE_CRASH);
} else {
switch (track) {
/* Draw single ground sprite when not overlapping. No track overlay
* is necessary for these sprites. */
case TRACK_BIT_X: DrawGroundSprite(ground + RTO_X, PAL_NONE); break;
case TRACK_BIT_Y: DrawGroundSprite(ground + RTO_Y, PAL_NONE); break;
case TRACK_BIT_UPPER: DrawTrackSprite(ground + RTO_N, PAL_NONE, ti, SLOPE_N); break;
case TRACK_BIT_LOWER: DrawTrackSprite(ground + RTO_S, PAL_NONE, ti, SLOPE_S); break;
case TRACK_BIT_RIGHT: DrawTrackSprite(ground + RTO_E, PAL_NONE, ti, SLOPE_E); break;
case TRACK_BIT_LEFT: DrawTrackSprite(ground + RTO_W, PAL_NONE, ti, SLOPE_W); break;
case TRACK_BIT_CROSS: DrawGroundSprite(ground + RTO_CROSSING_XY, PAL_NONE); break;
case TRACK_BIT_HORZ: DrawTrackSprite(ground + RTO_N, PAL_NONE, ti, SLOPE_N);
DrawTrackSprite(ground + RTO_S, PAL_NONE, ti, SLOPE_S); break;
case TRACK_BIT_VERT: DrawTrackSprite(ground + RTO_E, PAL_NONE, ti, SLOPE_E);
DrawTrackSprite(ground + RTO_W, PAL_NONE, ti, SLOPE_W); break;
default:
/* We're drawing a junction tile */
if ((track & TRACK_BIT_3WAY_NE) == 0) {
DrawGroundSprite(ground + RTO_JUNCTION_SW, PAL_NONE);
} else if ((track & TRACK_BIT_3WAY_SW) == 0) {
DrawGroundSprite(ground + RTO_JUNCTION_NE, PAL_NONE);
} else if ((track & TRACK_BIT_3WAY_NW) == 0) {
DrawGroundSprite(ground + RTO_JUNCTION_SE, PAL_NONE);
} else if ((track & TRACK_BIT_3WAY_SE) == 0) {
DrawGroundSprite(ground + RTO_JUNCTION_NW, PAL_NONE);
} else {
DrawGroundSprite(ground + RTO_JUNCTION_NSEW, PAL_NONE);
}
/* Mask out PBS bits as we shall draw them afterwards anyway. */
track &= ~pbs;
/* Draw regular track bits */
if (track & TRACK_BIT_X) DrawGroundSprite(overlay + RTO_X, PAL_NONE);
if (track & TRACK_BIT_Y) DrawGroundSprite(overlay + RTO_Y, PAL_NONE);
if (track & TRACK_BIT_UPPER) DrawGroundSprite(overlay + RTO_N, PAL_NONE);
if (track & TRACK_BIT_LOWER) DrawGroundSprite(overlay + RTO_S, PAL_NONE);
if (track & TRACK_BIT_RIGHT) DrawGroundSprite(overlay + RTO_E, PAL_NONE);
if (track & TRACK_BIT_LEFT) DrawGroundSprite(overlay + RTO_W, PAL_NONE);
}
/* Draw reserved track bits */
if (pbs & TRACK_BIT_X) DrawGroundSprite(overlay + RTO_X, PALETTE_CRASH);
if (pbs & TRACK_BIT_Y) DrawGroundSprite(overlay + RTO_Y, PALETTE_CRASH);
if (pbs & TRACK_BIT_UPPER) DrawTrackSprite(overlay + RTO_N, PALETTE_CRASH, ti, SLOPE_N);
if (pbs & TRACK_BIT_LOWER) DrawTrackSprite(overlay + RTO_S, PALETTE_CRASH, ti, SLOPE_S);
if (pbs & TRACK_BIT_RIGHT) DrawTrackSprite(overlay + RTO_E, PALETTE_CRASH, ti, SLOPE_E);
if (pbs & TRACK_BIT_LEFT) DrawTrackSprite(overlay + RTO_W, PALETTE_CRASH, ti, SLOPE_W);
}
if (IsValidCorner(halftile_corner)) {
DrawFoundation(ti, HalftileFoundation(halftile_corner));
overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY, TCX_UPPER_HALFTILE);
ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND, TCX_UPPER_HALFTILE);
/* Draw higher halftile-overlay: Use the sloped sprites with three corners raised. They probably best fit the lightning. */
Slope fake_slope = SlopeWithThreeCornersRaised(OppositeCorner(halftile_corner));
SpriteID image;
switch (rgt) {
case RAIL_GROUND_BARREN: image = SPR_FLAT_BARE_LAND; break;
case RAIL_GROUND_ICE_DESERT:
case RAIL_GROUND_HALF_SNOW: image = SPR_FLAT_SNOW_DESERT_TILE; break;
default: image = SPR_FLAT_GRASS_TILE; break;
}
image += SlopeToSpriteOffset(fake_slope);
DrawGroundSprite(image, PAL_NONE, &(_halftile_sub_sprite[halftile_corner]));
track = CornerToTrackBits(halftile_corner);
int offset;
switch (track) {
default: NOT_REACHED();
case TRACK_BIT_UPPER: offset = RTO_N; break;
case TRACK_BIT_LOWER: offset = RTO_S; break;
case TRACK_BIT_RIGHT: offset = RTO_E; break;
case TRACK_BIT_LEFT: offset = RTO_W; break;
}
DrawTrackSprite(ground + offset, PAL_NONE, ti, fake_slope);
if (_settings_client.gui.show_track_reservation && HasReservedTracks(ti->tile, track)) {
DrawTrackSprite(overlay + offset, PALETTE_CRASH, ti, fake_slope);
}
}
}
/**
* Draw ground sprite and track bits
* @param ti TileInfo
* @param track TrackBits to draw
*/
static void DrawTrackBits(TileInfo *ti, TrackBits track)
{
const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
if (rti->UsesOverlay()) {
DrawTrackBitsOverlay(ti, track, rti);
return;
}
RailGroundType rgt = GetRailGroundType(ti->tile);
Foundation f = GetRailFoundation(ti->tileh, track);
Corner halftile_corner = CORNER_INVALID;
if (IsNonContinuousFoundation(f)) {
/* Save halftile corner */
halftile_corner = (f == FOUNDATION_STEEP_BOTH ? GetHighestSlopeCorner(ti->tileh) : GetHalftileFoundationCorner(f));
/* Draw lower part first */
track &= ~CornerToTrackBits(halftile_corner);
f = (f == FOUNDATION_STEEP_BOTH ? FOUNDATION_STEEP_LOWER : FOUNDATION_NONE);
}
DrawFoundation(ti, f);
/* DrawFoundation modifies ti */
SpriteID image;
PaletteID pal = PAL_NONE;
const SubSprite *sub = NULL;
bool junction = false;
/* Select the sprite to use. */
if (track == 0) {
/* Clear ground (only track on halftile foundation) */
if (rgt == RAIL_GROUND_WATER) {
if (IsSteepSlope(ti->tileh)) {
DrawShoreTile(ti->tileh);
image = 0;
} else {
image = SPR_FLAT_WATER_TILE;
}
} else {
switch (rgt) {
case RAIL_GROUND_BARREN: image = SPR_FLAT_BARE_LAND; break;
case RAIL_GROUND_ICE_DESERT: image = SPR_FLAT_SNOW_DESERT_TILE; break;
default: image = SPR_FLAT_GRASS_TILE; break;
}
image += SlopeToSpriteOffset(ti->tileh);
}
} else {
if (ti->tileh != SLOPE_FLAT) {
/* track on non-flat ground */
image = _track_sloped_sprites[ti->tileh - 1] + rti->base_sprites.track_y;
} else {
/* track on flat ground */
(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);
}
switch (rgt) {
case RAIL_GROUND_BARREN: pal = PALETTE_TO_BARE_LAND; break;
case RAIL_GROUND_ICE_DESERT: image += rti->snow_offset; break;
case RAIL_GROUND_WATER: {
/* three-corner-raised slope */
DrawShoreTile(ti->tileh);
Corner track_corner = OppositeCorner(GetHighestSlopeCorner(ComplementSlope(ti->tileh)));
sub = &(_halftile_sub_sprite[track_corner]);
break;
}
default: break;
}
}
if (image != 0) DrawGroundSprite(image, pal, sub);
/* Draw track pieces individually for junction tiles */
if (junction) {
if (track & TRACK_BIT_X) DrawGroundSprite(rti->base_sprites.single_x, PAL_NONE);
if (track & TRACK_BIT_Y) DrawGroundSprite(rti->base_sprites.single_y, PAL_NONE);
if (track & TRACK_BIT_UPPER) DrawGroundSprite(rti->base_sprites.single_n, PAL_NONE);
if (track & TRACK_BIT_LOWER) DrawGroundSprite(rti->base_sprites.single_s, PAL_NONE);
if (track & TRACK_BIT_LEFT) DrawGroundSprite(rti->base_sprites.single_w, PAL_NONE);
if (track & TRACK_BIT_RIGHT) DrawGroundSprite(rti->base_sprites.single_e, PAL_NONE);
}
/* PBS debugging, draw reserved tracks darker */
if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation) {
/* Get reservation, but mask track on halftile slope */
TrackBits pbs = GetRailReservationTrackBits(ti->tile) & track;
if (pbs & TRACK_BIT_X) {
if (ti->tileh == SLOPE_FLAT || ti->tileh == SLOPE_ELEVATED) {
DrawGroundSprite(rti->base_sprites.single_x, PALETTE_CRASH);
} else {
DrawGroundSprite(_track_sloped_sprites[ti->tileh - 1] + rti->base_sprites.single_sloped - 20, PALETTE_CRASH);
}
}
if (pbs & TRACK_BIT_Y) {
if (ti->tileh == SLOPE_FLAT || ti->tileh == SLOPE_ELEVATED) {
DrawGroundSprite(rti->base_sprites.single_y, PALETTE_CRASH);
} else {
DrawGroundSprite(_track_sloped_sprites[ti->tileh - 1] + rti->base_sprites.single_sloped - 20, PALETTE_CRASH);
}
}
if (pbs & TRACK_BIT_UPPER) DrawGroundSprite(rti->base_sprites.single_n, PALETTE_CRASH, NULL, 0, ti->tileh & SLOPE_N ? -(int)TILE_HEIGHT : 0);
if (pbs & TRACK_BIT_LOWER) DrawGroundSprite(rti->base_sprites.single_s, PALETTE_CRASH, NULL, 0, ti->tileh & SLOPE_S ? -(int)TILE_HEIGHT : 0);
if (pbs & TRACK_BIT_LEFT) DrawGroundSprite(rti->base_sprites.single_w, PALETTE_CRASH, NULL, 0, ti->tileh & SLOPE_W ? -(int)TILE_HEIGHT : 0);
if (pbs & TRACK_BIT_RIGHT) DrawGroundSprite(rti->base_sprites.single_e, PALETTE_CRASH, NULL, 0, ti->tileh & SLOPE_E ? -(int)TILE_HEIGHT : 0);
}
if (IsValidCorner(halftile_corner)) {
DrawFoundation(ti, HalftileFoundation(halftile_corner));
/* Draw higher halftile-overlay: Use the sloped sprites with three corners raised. They probably best fit the lightning. */
Slope fake_slope = SlopeWithThreeCornersRaised(OppositeCorner(halftile_corner));
image = _track_sloped_sprites[fake_slope - 1] + rti->base_sprites.track_y;
pal = PAL_NONE;
switch (rgt) {
case RAIL_GROUND_BARREN: pal = PALETTE_TO_BARE_LAND; break;
case RAIL_GROUND_ICE_DESERT:
case RAIL_GROUND_HALF_SNOW: image += rti->snow_offset; break; // higher part has snow in this case too
default: break;
}
DrawGroundSprite(image, pal, &(_halftile_sub_sprite[halftile_corner]));
if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasReservedTracks(ti->tile, CornerToTrackBits(halftile_corner))) {
static const byte _corner_to_track_sprite[] = {3, 1, 2, 0};
DrawGroundSprite(_corner_to_track_sprite[halftile_corner] + rti->base_sprites.single_n, PALETTE_CRASH, NULL, 0, -(int)TILE_HEIGHT);
}
}
}
/**
* Enums holding the offsets from base signal sprite,
* according to the side it is representing.
* The addtion of 2 per enum is necessary in order to "jump" over the
* green state sprite, all signal sprites being in pair,
* starting with the off-red state
*/
enum SignalOffsets {
SIGNAL_TO_SOUTHWEST = 0,
SIGNAL_TO_NORTHEAST = 2,
SIGNAL_TO_SOUTHEAST = 4,
SIGNAL_TO_NORTHWEST = 6,
SIGNAL_TO_EAST = 8,
SIGNAL_TO_WEST = 10,
SIGNAL_TO_SOUTH = 12,
SIGNAL_TO_NORTH = 14,
};
static void DrawSignals(TileIndex tile, TrackBits rails)
{
#define MAYBE_DRAW_SIGNAL(x, y, z, t) if (IsSignalPresent(tile, x)) DrawSingleSignal(tile, t, GetSingleSignalState(tile, x), y, z)
if (!(rails & TRACK_BIT_Y)) {
if (!(rails & TRACK_BIT_X)) {
if (rails & TRACK_BIT_LEFT) {
MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTH, 0, TRACK_LEFT);
MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTH, 1, TRACK_LEFT);
}
if (rails & TRACK_BIT_RIGHT) {
MAYBE_DRAW_SIGNAL(0, SIGNAL_TO_NORTH, 2, TRACK_RIGHT);
MAYBE_DRAW_SIGNAL(1, SIGNAL_TO_SOUTH, 3, TRACK_RIGHT);
}
if (rails & TRACK_BIT_UPPER) {
MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_WEST, 4, TRACK_UPPER);
MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_EAST, 5, TRACK_UPPER);
}
if (rails & TRACK_BIT_LOWER) {
MAYBE_DRAW_SIGNAL(1, SIGNAL_TO_WEST, 6, TRACK_LOWER);
MAYBE_DRAW_SIGNAL(0, SIGNAL_TO_EAST, 7, TRACK_LOWER);
}
} else {
MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTHWEST, 8, TRACK_X);
MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTHEAST, 9, TRACK_X);
}
} else {
MAYBE_DRAW_SIGNAL(3, SIGNAL_TO_SOUTHEAST, 10, TRACK_Y);
MAYBE_DRAW_SIGNAL(2, SIGNAL_TO_NORTHWEST, 11, TRACK_Y);
}
}
static void DrawTile_Track(TileInfo *ti)
{
const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
_drawtile_track_palette = COMPANY_SPRITE_COLOUR(GetTileOwner(ti->tile));
if (IsPlainRail(ti->tile)) {
TrackBits rails = GetTrackBits(ti->tile);
DrawTrackBits(ti, rails);
if (HasBit(_display_opt, DO_FULL_DETAIL)) DrawTrackDetails(ti, rti);
if (HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
if (HasSignals(ti->tile)) DrawSignals(ti->tile, rails);
} else {
/* draw depot */
const DrawTileSprites *dts;
PaletteID pal = PAL_NONE;
SpriteID relocation;
if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
if (IsInvisibilitySet(TO_BUILDINGS)) {
/* Draw rail instead of depot */
dts = &_depot_invisible_gfx_table[GetRailDepotDirection(ti->tile)];
} else {
dts = &_depot_gfx_table[GetRailDepotDirection(ti->tile)];
}
SpriteID image;
if (rti->UsesOverlay()) {
image = SPR_FLAT_GRASS_TILE;
} else {
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) && _settings_game.game_creation.landscape == LT_TROPIC) {
if (image != SPR_FLAT_GRASS_TILE) {
image += rti->snow_offset; // tile with tracks
} else {
image = SPR_FLAT_SNOW_DESERT_TILE; // flat ground
}
}
DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, _drawtile_track_palette));
if (rti->UsesOverlay()) {
SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
switch (GetRailDepotDirection(ti->tile)) {
case DIAGDIR_NE: if (!IsInvisibilitySet(TO_BUILDINGS)) break; // else FALL THROUGH
case DIAGDIR_SW: DrawGroundSprite(ground + RTO_X, PAL_NONE); break;
case DIAGDIR_NW: if (!IsInvisibilitySet(TO_BUILDINGS)) break; // else FALL THROUGH
case DIAGDIR_SE: DrawGroundSprite(ground + RTO_Y, PAL_NONE); break;
default: break;
}
if (_settings_client.gui.show_track_reservation && HasDepotReservation(ti->tile)) {
SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
switch (GetRailDepotDirection(ti->tile)) {
case DIAGDIR_NE: if (!IsInvisibilitySet(TO_BUILDINGS)) break; // else FALL THROUGH
case DIAGDIR_SW: DrawGroundSprite(overlay + RTO_X, PALETTE_CRASH); break;
case DIAGDIR_NW: if (!IsInvisibilitySet(TO_BUILDINGS)) break; // else FALL THROUGH
case DIAGDIR_SE: DrawGroundSprite(overlay + RTO_Y, PALETTE_CRASH); break;
default: break;
}
}
int depot_sprite = GetCustomRailSprite(rti, ti->tile, RTSG_DEPOT);
relocation = depot_sprite != 0 ? depot_sprite - SPR_RAIL_DEPOT_SE_1 : rti->total_offset;
} else {
/* PBS debugging, draw reserved tracks darker */
if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasDepotReservation(ti->tile)) {
switch (GetRailDepotDirection(ti->tile)) {
case DIAGDIR_NE: if (!IsInvisibilitySet(TO_BUILDINGS)) break; // else FALL THROUGH
case DIAGDIR_SW: DrawGroundSprite(rti->base_sprites.single_x, PALETTE_CRASH); break;
case DIAGDIR_NW: if (!IsInvisibilitySet(TO_BUILDINGS)) break; // else FALL THROUGH
case DIAGDIR_SE: DrawGroundSprite(rti->base_sprites.single_y, PALETTE_CRASH); break;
default: break;
}
}
relocation = rti->total_offset;
}
if (HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
DrawRailTileSeq(ti, dts, TO_BUILDINGS, relocation, 0, _drawtile_track_palette);
}
DrawBridgeMiddle(ti);
}
void DrawTrainDepotSprite(int x, int y, int dir, RailType railtype)
{
const DrawTileSprites *dts = &_depot_gfx_table[dir];
const RailtypeInfo *rti = GetRailTypeInfo(railtype);
SpriteID image = rti->UsesOverlay() ? SPR_FLAT_GRASS_TILE : dts->ground.sprite;
uint32 offset = rti->total_offset;
x += 33;
y += 17;
if (image != SPR_FLAT_GRASS_TILE) image += offset;
PaletteID palette = COMPANY_SPRITE_COLOUR(_local_company);
DrawSprite(image, PAL_NONE, x, y);
if (rti->UsesOverlay()) {
SpriteID ground = GetCustomRailSprite(rti, INVALID_TILE, RTSG_GROUND);
switch (dir) {
case DIAGDIR_SW: DrawSprite(ground + RTO_X, PAL_NONE, x, y); break;
case DIAGDIR_SE: DrawSprite(ground + RTO_Y, PAL_NONE, x, y); break;
default: break;
}
int depot_sprite = GetCustomRailSprite(rti, INVALID_TILE, RTSG_DEPOT);
if (depot_sprite != 0) offset = depot_sprite - SPR_RAIL_DEPOT_SE_1;
}
DrawRailTileSeqInGUI(x, y, dts, offset, 0, palette);
}
static uint GetSlopeZ_Track(TileIndex tile, uint x, uint y)
{
uint z;
Slope tileh = GetTileSlope(tile, &z);
if (tileh == SLOPE_FLAT) return z;
if (IsPlainRail(tile)) {
z += ApplyFoundationToSlope(GetRailFoundation(tileh, GetTrackBits(tile)), &tileh);
return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
} else {
return z + TILE_HEIGHT;
}
}
static Foundation GetFoundation_Track(TileIndex tile, Slope tileh)
{
return IsPlainRail(tile) ? GetRailFoundation(tileh, GetTrackBits(tile)) : FlatteningFoundation(tileh);
}
static void TileLoop_Track(TileIndex tile)
{
RailGroundType old_ground = GetRailGroundType(tile);
RailGroundType new_ground;
if (old_ground == RAIL_GROUND_WATER) {
TileLoop_Water(tile);
return;
}
switch (_settings_game.game_creation.landscape) {
case LT_ARCTIC: {
uint z;
Slope slope = GetTileSlope(tile, &z);
bool half = false;
/* for non-flat track, use lower part of track
* in other cases, use the highest part with track */
if (IsPlainRail(tile)) {
TrackBits track = GetTrackBits(tile);
Foundation f = GetRailFoundation(slope, track);
switch (f) {
case FOUNDATION_NONE:
/* no foundation - is the track on the upper side of three corners raised tile? */
if (IsSlopeWithThreeCornersRaised(slope)) z += TILE_HEIGHT;
break;
case FOUNDATION_INCLINED_X:
case FOUNDATION_INCLINED_Y:
/* sloped track - is it on a steep slope? */
if (IsSteepSlope(slope)) z += TILE_HEIGHT;
break;
case FOUNDATION_STEEP_LOWER:
/* only lower part of steep slope */
z += TILE_HEIGHT;
break;
default:
/* if it is a steep slope, then there is a track on higher part */
if (IsSteepSlope(slope)) z += TILE_HEIGHT;
z += TILE_HEIGHT;
break;
}
half = IsInsideMM(f, FOUNDATION_STEEP_BOTH, FOUNDATION_HALFTILE_N + 1);
} else {
/* is the depot on a non-flat tile? */
if (slope != SLOPE_FLAT) z += TILE_HEIGHT;
}
/* 'z' is now the lowest part of the highest track bit -
* for sloped track, it is 'z' of lower part
* for two track bits, it is 'z' of higher track bit
* For non-continuous foundations (and STEEP_BOTH), 'half' is set */
if (z > GetSnowLine()) {
if (half && z - GetSnowLine() == TILE_HEIGHT) {
/* track on non-continuous foundation, lower part is not under snow */
new_ground = RAIL_GROUND_HALF_SNOW;
} else {
new_ground = RAIL_GROUND_ICE_DESERT;
}
goto set_ground;
}
break;
}
case LT_TROPIC:
if (GetTropicZone(tile) == TROPICZONE_DESERT) {
new_ground = RAIL_GROUND_ICE_DESERT;
goto set_ground;
}
break;
}
new_ground = RAIL_GROUND_GRASS;
if (IsPlainRail(tile) && 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: {
Owner 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 = (IsPlainRailTile(n) ? GetTrackBits(n) : TRACK_BIT_NONE);
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 = (IsPlainRailTile(n) ? GetTrackBits(n) : TRACK_BIT_NONE);
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 = (IsPlainRailTile(n) ? GetTrackBits(n) : TRACK_BIT_NONE);
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 = (IsPlainRailTile(n) ? GetTrackBits(n) : TRACK_BIT_NONE);
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 TrackStatus GetTileTrackStatus_Track(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
{
/* Case of half tile slope with water. */
if (mode == TRANSPORT_WATER && IsPlainRail(tile) && GetRailGroundType(tile) == RAIL_GROUND_WATER) {
TrackBits tb = GetTrackBits(tile);
switch (tb) {
default: NOT_REACHED();
case TRACK_BIT_UPPER: tb = TRACK_BIT_LOWER; break;
case TRACK_BIT_LOWER: tb = TRACK_BIT_UPPER; break;
case TRACK_BIT_LEFT: tb = TRACK_BIT_RIGHT; break;
case TRACK_BIT_RIGHT: tb = TRACK_BIT_LEFT; break;
}
return CombineTrackStatus(TrackBitsToTrackdirBits(tb), TRACKDIR_BIT_NONE);
}
if (mode != TRANSPORT_RAIL) return 0;
TrackBits trackbits = TRACK_BIT_NONE;
TrackdirBits red_signals = TRACKDIR_BIT_NONE;
switch (GetRailTileType(tile)) {
default: NOT_REACHED();
case RAIL_TILE_NORMAL:
trackbits = GetTrackBits(tile);
break;
case RAIL_TILE_SIGNALS: {
trackbits = GetTrackBits(tile);
byte a = GetPresentSignals(tile);
uint b = GetSignalStates(tile);
b &= a;
/* When signals are not present (in neither direction),
* we pretend them to be green. Otherwise, it depends on
* the signal type. For signals that are only active from
* one side, we set the missing signals explicitely to
* `green'. Otherwise, they implicitely become `red'. */
if (!IsOnewaySignal(tile, TRACK_UPPER) || (a & SignalOnTrack(TRACK_UPPER)) == 0) b |= ~a & SignalOnTrack(TRACK_UPPER);
if (!IsOnewaySignal(tile, TRACK_LOWER) || (a & SignalOnTrack(TRACK_LOWER)) == 0) b |= ~a & SignalOnTrack(TRACK_LOWER);
if ((b & 0x8) == 0) red_signals |= (TRACKDIR_BIT_LEFT_N | TRACKDIR_BIT_X_NE | TRACKDIR_BIT_Y_SE | TRACKDIR_BIT_UPPER_E);
if ((b & 0x4) == 0) red_signals |= (TRACKDIR_BIT_LEFT_S | TRACKDIR_BIT_X_SW | TRACKDIR_BIT_Y_NW | TRACKDIR_BIT_UPPER_W);
if ((b & 0x2) == 0) red_signals |= (TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_LOWER_E);
if ((b & 0x1) == 0) red_signals |= (TRACKDIR_BIT_RIGHT_S | TRACKDIR_BIT_LOWER_W);
break;
}
case RAIL_TILE_DEPOT: {
DiagDirection dir = GetRailDepotDirection(tile);
if (side != INVALID_DIAGDIR && side != dir) break;
trackbits = DiagDirToDiagTrackBits(dir);
break;
}
}
return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), red_signals);
}
static bool ClickTile_Track(TileIndex tile)
{
if (!IsRailDepot(tile)) return false;
ShowDepotWindow(tile, VEH_TRAIN);
return true;
}
static void GetTileDesc_Track(TileIndex tile, TileDesc *td)
{
const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
td->rail_speed = rti->max_speed;
td->owner[0] = GetTileOwner(tile);
switch (GetRailTileType(tile)) {
case RAIL_TILE_NORMAL:
td->str = STR_LAI_RAIL_DESCRIPTION_TRACK;
break;
case RAIL_TILE_SIGNALS: {
static const StringID signal_type[6][6] = {
{
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_SIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PRESIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_EXITSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_COMBOSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PBSSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_NOENTRYSIGNALS
},
{
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PRESIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRESIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_EXITSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_COMBOSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_PBSSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_NOENTRYSIGNALS
},
{
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_EXITSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_EXITSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXITSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_COMBOSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_PBSSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_NOENTRYSIGNALS
},
{
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_COMBOSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_COMBOSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_COMBOSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBOSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_PBSSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_NOENTRYSIGNALS
},
{
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_PBSSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_PBSSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_PBSSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_PBSSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PBSSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PBS_NOENTRYSIGNALS
},
{
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NORMAL_NOENTRYSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PRE_NOENTRYSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_EXIT_NOENTRYSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_COMBO_NOENTRYSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_PBS_NOENTRYSIGNALS,
STR_LAI_RAIL_DESCRIPTION_TRACK_WITH_NOENTRYSIGNALS
}
};
SignalType primary_signal;
SignalType secondary_signal;
if (HasSignalOnTrack(tile, TRACK_UPPER)) {
primary_signal = GetSignalType(tile, TRACK_UPPER);
secondary_signal = HasSignalOnTrack(tile, TRACK_LOWER) ? GetSignalType(tile, TRACK_LOWER) : primary_signal;
} else {
secondary_signal = primary_signal = GetSignalType(tile, TRACK_LOWER);
}
td->str = signal_type[secondary_signal][primary_signal];
break;
}
case RAIL_TILE_DEPOT:
td->str = STR_LAI_RAIL_DESCRIPTION_TRAIN_DEPOT;
if (_settings_game.vehicle.train_acceleration_model != AM_ORIGINAL) {
if (td->rail_speed > 0) {
td->rail_speed = min(td->rail_speed, 61);
} else {
td->rail_speed = 61;
}
}
td->build_date = Depot::GetByTile(tile)->build_date;
break;
default:
NOT_REACHED();
}
}
static void ChangeTileOwner_Track(TileIndex tile, Owner old_owner, Owner new_owner)
{
if (!IsTileOwner(tile, old_owner)) return;
if (new_owner != INVALID_OWNER) {
SetTileOwner(tile, new_owner);
} else {
DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, 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 int8 _deltacoord_leaveoffset[8] = {
-1, 0, 1, 0, /* x */
0, 1, 0, -1 /* y */
};
/**
* Compute number of ticks when next wagon will leave a depot.
* Negative means next wagon should have left depot n ticks before.
* @param v vehicle outside (leaving) the depot
* @return number of ticks when the next wagon will leave
*/
int TicksToLeaveDepot(const Train *v)
{
DiagDirection dir = GetRailDepotDirection(v->tile);
int length = v->gcache.cached_veh_length;
switch (dir) {
case DIAGDIR_NE: return ((int)(v->x_pos & 0x0F) - ((_fractcoords_enter[dir] & 0x0F) - (length + 1)));
case DIAGDIR_SE: return -((int)(v->y_pos & 0x0F) - ((_fractcoords_enter[dir] >> 4) + (length + 1)));
case DIAGDIR_SW: return -((int)(v->x_pos & 0x0F) - ((_fractcoords_enter[dir] & 0x0F) + (length + 1)));
default:
case DIAGDIR_NW: return ((int)(v->y_pos & 0x0F) - ((_fractcoords_enter[dir] >> 4) - (length + 1)));
}
return 0; // make compilers happy
}
/**
* Tile callback routine when vehicle enters tile
* @see vehicle_enter_tile_proc
*/
static VehicleEnterTileStatus VehicleEnter_Track(Vehicle *u, TileIndex tile, int x, int y)
{
/* this routine applies only to trains in depot tiles */
if (u->type != VEH_TRAIN || !IsRailDepotTile(tile)) return VETSB_CONTINUE;
Train *v = Train::From(u);
/* depot direction */
DiagDirection dir = GetRailDepotDirection(tile);
/* calculate the point where the following wagon should be activated
* this depends on the length of the current vehicle */
int length = v->gcache.cached_veh_length;
byte 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);
byte 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 VETSB_CANNOT_ENTER;
} else if (_fractcoords_enter[dir] == fract_coord) {
if (DiagDirToDir(ReverseDiagDir(dir)) == v->direction) {
/* enter the depot */
v->track = TRACK_BIT_DEPOT,
v->vehstatus |= VS_HIDDEN; // hide it
v->direction = ReverseDir(v->direction);
if (v->Next() == NULL) VehicleEnterDepot(v->First());
v->tile = tile;
InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
return VETSB_ENTERED_WORMHOLE;
}
} 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->track = (DiagDirToAxis(dir) == AXIS_X ? TRACK_BIT_X : TRACK_BIT_Y);
}
}
}
return VETSB_CONTINUE;
}
/**
* Tests if autoslope is allowed.
*
* @param tile The tile.
* @param flags Terraform command flags.
* @param z_old Old TileZ.
* @param tileh_old Old TileSlope.
* @param z_new New TileZ.
* @param tileh_new New TileSlope.
* @param rail_bits Trackbits.
*/
static CommandCost TestAutoslopeOnRailTile(TileIndex tile, uint flags, uint z_old, Slope tileh_old, uint z_new, Slope tileh_new, TrackBits rail_bits)
{
if (!_settings_game.construction.build_on_slopes || !AutoslopeEnabled()) return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
/* Is the slope-rail_bits combination valid in general? I.e. is it safe to call GetRailFoundation() ? */
if (CheckRailSlope(tileh_new, rail_bits, TRACK_BIT_NONE, tile).Failed()) return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
/* Get the slopes on top of the foundations */
z_old += ApplyFoundationToSlope(GetRailFoundation(tileh_old, rail_bits), &tileh_old);
z_new += ApplyFoundationToSlope(GetRailFoundation(tileh_new, rail_bits), &tileh_new);
Corner track_corner;
switch (rail_bits) {
case TRACK_BIT_LEFT: track_corner = CORNER_W; break;
case TRACK_BIT_LOWER: track_corner = CORNER_S; break;
case TRACK_BIT_RIGHT: track_corner = CORNER_E; break;
case TRACK_BIT_UPPER: track_corner = CORNER_N; break;
/* Surface slope must not be changed */
default:
if (z_old != z_new || tileh_old != tileh_new) return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
}
/* The height of the track_corner must not be changed. The rest ensures GetRailFoundation() already. */
z_old += GetSlopeZInCorner(RemoveHalftileSlope(tileh_old), track_corner);
z_new += GetSlopeZInCorner(RemoveHalftileSlope(tileh_new), track_corner);
if (z_old != z_new) return_cmd_error(STR_ERROR_MUST_REMOVE_RAILROAD_TRACK);
CommandCost cost = CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
/* Make the ground dirty, if surface slope has changed */
if (tileh_old != tileh_new) {
/* If there is flat water on the lower halftile add the cost for clearing it */
if (GetRailGroundType(tile) == RAIL_GROUND_WATER && IsSlopeWithOneCornerRaised(tileh_old)) cost.AddCost(_price[PR_CLEAR_WATER]);
if ((flags & DC_EXEC) != 0) SetRailGroundType(tile, RAIL_GROUND_BARREN);
}
return cost;
}
static CommandCost TerraformTile_Track(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
{
uint z_old;
Slope tileh_old = GetTileSlope(tile, &z_old);
if (IsPlainRail(tile)) {
TrackBits rail_bits = GetTrackBits(tile);
/* Is there flat water on the lower halftile that must be cleared expensively? */
bool was_water = (GetRailGroundType(tile) == RAIL_GROUND_WATER && IsSlopeWithOneCornerRaised(tileh_old));
/* First test autoslope. However if it succeeds we still have to test the rest, because non-autoslope terraforming is cheaper. */
CommandCost autoslope_result = TestAutoslopeOnRailTile(tile, flags, z_old, tileh_old, z_new, tileh_new, rail_bits);
/* When there is only a single horizontal/vertical track, one corner can be terraformed. */
Corner allowed_corner;
switch (rail_bits) {
case TRACK_BIT_RIGHT: allowed_corner = CORNER_W; break;
case TRACK_BIT_UPPER: allowed_corner = CORNER_S; break;
case TRACK_BIT_LEFT: allowed_corner = CORNER_E; break;
case TRACK_BIT_LOWER: allowed_corner = CORNER_N; break;
default: return autoslope_result;
}
Foundation f_old = GetRailFoundation(tileh_old, rail_bits);
/* Do not allow terraforming if allowed_corner is part of anti-zig-zag foundations */
if (tileh_old != SLOPE_NS && tileh_old != SLOPE_EW && IsSpecialRailFoundation(f_old)) return autoslope_result;
/* Everything is valid, which only changes allowed_corner */
for (Corner corner = (Corner)0; corner < CORNER_END; corner = (Corner)(corner + 1)) {
if (allowed_corner == corner) continue;
if (z_old + GetSlopeZInCorner(tileh_old, corner) != z_new + GetSlopeZInCorner(tileh_new, corner)) return autoslope_result;
}
/* Make the ground dirty */
if ((flags & DC_EXEC) != 0) SetRailGroundType(tile, RAIL_GROUND_BARREN);
/* allow terraforming */
return CommandCost(EXPENSES_CONSTRUCTION, was_water ? _price[PR_CLEAR_WATER] : (Money)0);
} else if (_settings_game.construction.build_on_slopes && AutoslopeEnabled() &&
AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, GetRailDepotDirection(tile))) {
return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
}
return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
}
extern const TileTypeProcs _tile_type_rail_procs = {
DrawTile_Track, // draw_tile_proc
GetSlopeZ_Track, // get_slope_z_proc
ClearTile_Track, // clear_tile_proc
NULL, // add_accepted_cargo_proc
GetTileDesc_Track, // get_tile_desc_proc
GetTileTrackStatus_Track, // get_tile_track_status_proc
ClickTile_Track, // click_tile_proc
NULL, // animate_tile_proc
TileLoop_Track, // tile_loop_clear
ChangeTileOwner_Track, // change_tile_owner_clear
NULL, // add_produced_cargo_proc
VehicleEnter_Track, // vehicle_enter_tile_proc
GetFoundation_Track, // get_foundation_proc
TerraformTile_Track, // terraform_tile_proc
};
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