(svn r11433) -Fix: starting OpenTTD with DOS files made it look weird out of the box.
-Change: make extra sprites (the ones not in the TTD GRFs) replaceable using Action 5.
-Feature: make replacing contiguous subsets of sprites in for some types possible in Action 5.
Note to GRF authors: when you replaced OpenTTD sprites that are not from the TTD GRF files using Action A, your GRF will not have the intended result anymore as the sprite numbers have changed. You should replace the Action A with an Action 5 from now on.
/* $Id$ */
/** @file rail_cmd.cpp */
#include "stdafx.h"
#include "openttd.h"
#include "bridge_map.h"
#include "bridge.h"
#include "cmd_helper.h"
#include "debug.h"
#include "functions.h"
#include "rail_map.h"
#include "road_map.h"
#include "table/sprites.h"
#include "table/strings.h"
#include "map.h"
#include "landscape.h"
#include "tile.h"
#include "town_map.h"
#include "tunnel_map.h"
#include "vehicle.h"
#include "viewport.h"
#include "command.h"
#include "pathfind.h"
#include "engine.h"
#include "town.h"
#include "sound.h"
#include "station.h"
#include "sprite.h"
#include "depot.h"
#include "waypoint.h"
#include "window.h"
#include "rail.h"
#include "railtypes.h" // include table for railtypes
#include "newgrf.h"
#include "yapf/yapf.h"
#include "newgrf_engine.h"
#include "newgrf_callbacks.h"
#include "newgrf_station.h"
#include "train.h"
#include "misc/autoptr.hpp"
#include "autoslope.h"
#include "transparency.h"
const byte _track_sloped_sprites[14] = {
14, 15, 22, 13,
0, 21, 17, 12,
23, 0, 18, 20,
19, 16
};
/* 4
* ---------
* |\ /|
* | \ 1/ |
* | \ / |
* | \ / |
* 16| \ |32
* | / \2 |
* | / \ |
* | / \ |
* |/ \|
* ---------
* 8
*/
/* MAP2 byte: abcd???? => Signal On? Same coding as map3lo
* MAP3LO byte: abcd???? => Signal Exists?
* a and b are for diagonals, upper and left,
* one for each direction. (ie a == NE->SW, b ==
* SW->NE, or v.v., I don't know. b and c are
* similar for lower and right.
* MAP2 byte: ????abcd => Type of ground.
* MAP3LO byte: ????abcd => Type of rail.
* MAP5: 00abcdef => rail
* 01abcdef => rail w/ signals
* 10uuuuuu => unused
* 11uuuudd => rail depot
*/
/** Struct used in EnsureNoTrainOnTrack() */
struct TrainOnTrackData {
TileIndex tile; ///< tile to check
uint z; ///< tile max Z
TrackBits rail_bits; ///< trackbits of interest
};
static void *EnsureNoTrainOnTrackProc(Vehicle *v, void *data)
{
const TrainOnTrackData *info = (const TrainOnTrackData *)data;
if (v->tile != info->tile || v->type != VEH_TRAIN) return NULL;
if (v->z_pos > info->z) return NULL;
if ((v->u.rail.track != info->rail_bits) && !TracksOverlap(v->u.rail.track | info->rail_bits)) return NULL;
_error_message = VehicleInTheWayErrMsg(v);
return v;
}
/**
* 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.
*/
static bool EnsureNoTrainOnTrack(TileIndex tile, Track track)
{
TrainOnTrackData info;
info.tile = tile;
info.z = GetTileMaxZ(tile);
info.rail_bits = TrackToTrackBits(track);
return VehicleFromPos(tile, &info, EnsureNoTrainOnTrackProc) == NULL;
}
static bool CheckTrackCombination(TileIndex tile, TrackBits to_build, uint flags)
{
TrackBits current; // The current track layout
TrackBits future; // The track layout we want to build
_error_message = STR_1001_IMPOSSIBLE_TRACK_COMBINATION;
if (!IsPlainRailTile(tile)) return false;
/* So, we have a tile with tracks on it (and possibly signals). Let's see
* what tracks first */
current = GetTrackBits(tile);
future = current | to_build;
/* Are we really building something new? */
if (current == future) {
/* Nothing new is being built */
_error_message = STR_1007_ALREADY_BUILT;
return false;
}
/* Let's see if we may build this */
if (flags & DC_NO_RAIL_OVERLAP || HasSignals(tile)) {
/* If we are not allowed to overlap (flag is on for ai players or we have
* signals on the tile), check that */
return future == TRACK_BIT_HORZ || future == TRACK_BIT_VERT;
} else {
/* Normally, we may overlap and any combination is valid */
return true;
}
}
/** 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 (HasSlopeHighestCorner(tileh)) return FOUNDATION_INCLINED_X;
return (valid_on_leveled ? FOUNDATION_LEVELED : FOUNDATION_INVALID);
case TRACK_BIT_Y:
if (HasSlopeHighestCorner(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 (HasSlopeHighestCorner(ComplementSlope(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 (IsTileType(tile, MP_WATER) || (IsTileType(tile, MP_RAILWAY) && (GetRailGroundType(tile) == RAIL_GROUND_WATER))) {
if (!IsSteepSlope(tileh) && ((~_valid_tracks_on_leveled_foundation[tileh] & (rail_bits | existing)) != 0)) return_cmd_error(STR_3807_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) && (!_patches.build_on_slopes || _is_old_ai_player))
) return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
Foundation f_old = GetRailFoundation(tileh, existing);
return CommandCost(f_new != f_old ? _price.terraform : (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
*/
CommandCost CmdBuildSingleRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
Slope tileh;
RailType railtype;
Track track;
TrackBits trackbit;
CommandCost cost;
CommandCost ret;
if (!ValParamRailtype(p1) || !ValParamTrackOrientation((Track)p2)) return CMD_ERROR;
railtype = (RailType)p1;
track = (Track)p2;
tileh = GetTileSlope(tile, NULL);
trackbit = TrackToTrackBits(track);
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
switch (GetTileType(tile)) {
case MP_RAILWAY:
if (!CheckTrackCombination(tile, trackbit, flags) ||
!EnsureNoTrainOnTrack(tile, track)) {
return CMD_ERROR;
}
if (!IsTileOwner(tile, _current_player) ||
!IsCompatibleRail(GetRailType(tile), railtype)) {
/* Get detailed error message */
return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
}
ret = CheckRailSlope(tileh, trackbit, GetTrackBits(tile), tile);
if (CmdFailed(ret)) return ret;
cost.AddCost(ret);
/* If the rail types don't match, try to convert only if engines of
* the present rail type are powered on the new rail type. */
if (GetRailType(tile) != railtype && HasPowerOnRail(GetRailType(tile), railtype)) {
ret = DoCommand(tile, tile, railtype, flags, CMD_CONVERT_RAIL);
if (CmdFailed(ret)) return ret;
cost.AddCost(ret);
}
if (flags & DC_EXEC) {
SetRailGroundType(tile, RAIL_GROUND_BARREN);
SetTrackBits(tile, GetTrackBits(tile) | trackbit);
}
break;
case MP_ROAD:
#define M(x) (1 << (x))
/* Level crossings may only be built on these slopes */
if (!HASBIT(M(SLOPE_SEN) | M(SLOPE_ENW) | M(SLOPE_NWS) | M(SLOPE_NS) | M(SLOPE_WSE) | M(SLOPE_EW) | M(SLOPE_FLAT), tileh)) {
return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
}
#undef M
if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
if (GetRoadTileType(tile) == ROAD_TILE_NORMAL) {
if (HasRoadWorks(tile)) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS);
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. */
SetRoadOwner(tile, ROADTYPE_ROAD, _current_player);
roadtypes |= ROADTYPES_ROAD;
break;
case ROADTYPES_ROADTRAM: if (road == tram) break;
/* FALL THROUGH */
case ROADTYPES_ROADHWAY: // Road and highway are incompatible in this case
case ROADTYPES_TRAMHWAY: // Tram and highway are incompatible in this case
case ROADTYPES_ALL: // Also incompatible
return CMD_ERROR;
}
road |= tram | GetRoadBits(tile, ROADTYPE_HWAY);
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), GetRoadOwner(tile, ROADTYPE_HWAY), _current_player, (track == TRACK_X ? AXIS_Y : AXIS_X), railtype, roadtypes, GetTownIndex(tile));
}
break;
}
}
if (IsLevelCrossing(tile) && GetCrossingRailBits(tile) == trackbit) {
return_cmd_error(STR_1007_ALREADY_BUILT);
}
/* FALLTHROUGH */
default:
bool water_ground = IsTileType(tile, MP_WATER) && !IsSteepSlope(tileh) && HasSlopeHighestCorner(tileh);
ret = CheckRailSlope(tileh, trackbit, TRACK_BIT_NONE, tile);
if (CmdFailed(ret)) return ret;
cost.AddCost(ret);
ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
if (CmdFailed(ret)) return ret;
cost.AddCost(ret);
if (water_ground) {
cost.AddCost(-_price.clear_water);
cost.AddCost(_price.purchase_land);
}
if (flags & DC_EXEC) {
MakeRailNormal(tile, _current_player, trackbit, railtype);
if (water_ground) SetRailGroundType(tile, RAIL_GROUND_WATER);
}
break;
}
if (flags & DC_EXEC) {
MarkTileDirtyByTile(tile);
SetSignalsOnBothDir(tile, track);
YapfNotifyTrackLayoutChange(tile, track);
}
return cost.AddCost(RailBuildCost(railtype));
}
/** 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
*/
CommandCost CmdRemoveSingleRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
Track track = (Track)p2;
TrackBits trackbit;
CommandCost cost(_price.remove_rail);
bool crossing = false;
if (!ValParamTrackOrientation((Track)p2)) return CMD_ERROR;
trackbit = TrackToTrackBits(track);
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
switch (GetTileType(tile)) {
case MP_ROAD: {
if (!IsLevelCrossing(tile) ||
GetCrossingRailBits(tile) != trackbit ||
(_current_player != OWNER_WATER && !CheckTileOwnership(tile)) ||
!EnsureNoVehicleOnGround(tile)) {
return CMD_ERROR;
}
if (flags & DC_EXEC) {
MakeRoadNormal(tile, GetCrossingRoadBits(tile), GetRoadTypes(tile), GetTownIndex(tile), GetRoadOwner(tile, ROADTYPE_ROAD), GetRoadOwner(tile, ROADTYPE_TRAM), GetRoadOwner(tile, ROADTYPE_HWAY));
}
break;
}
case MP_RAILWAY: {
TrackBits present;
if (!IsPlainRailTile(tile) ||
(_current_player != OWNER_WATER && !CheckTileOwnership(tile)) ||
!EnsureNoTrainOnTrack(tile, track)) {
return CMD_ERROR;
}
present = GetTrackBits(tile);
if ((present & trackbit) == 0) return CMD_ERROR;
if (present == (TRACK_BIT_X | TRACK_BIT_Y)) crossing = true;
/* Charge extra to remove signals on the track, if they are there */
if (HasSignalOnTrack(tile, track))
cost.AddCost(DoCommand(tile, track, 0, flags, CMD_REMOVE_SIGNALS));
if (flags & DC_EXEC) {
present ^= trackbit;
if (present == 0) {
if (GetRailGroundType(tile) == RAIL_GROUND_WATER) {
MakeShore(tile);
} else {
DoClearSquare(tile);
}
} else {
SetTrackBits(tile, present);
}
}
break;
}
default: return CMD_ERROR;
}
if (flags & DC_EXEC) {
MarkTileDirtyByTile(tile);
if (crossing) {
/* crossing is set when only TRACK_BIT_X and TRACK_BIT_Y are set. As we
* are removing one of these pieces, we'll need to update signals for
* both directions explicitly, as after the track is removed it won't
* 'connect' with the other piece. */
SetSignalsOnBothDir(tile, TRACK_X);
SetSignalsOnBothDir(tile, TRACK_Y);
YapfNotifyTrackLayoutChange(tile, TRACK_X);
YapfNotifyTrackLayoutChange(tile, TRACK_Y);
} else {
SetSignalsOnBothDir(tile, track);
YapfNotifyTrackLayoutChange(tile, track);
}
}
return cost;
}
/**
* 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.
*/
void FloodHalftile(TileIndex t)
{
if (GetRailGroundType(t) == RAIL_GROUND_WATER) return;
Slope tileh = GetTileSlope(t, NULL);
TrackBits rail_bits = GetTrackBits(t);
if (!IsSteepSlope(tileh) && HasSlopeHighestCorner(tileh)) {
TrackBits lower_track = CornerToTrackBits(OppositeCorner(GetHighestSlopeCorner(tileh)));
TrackBits to_remove = lower_track & rail_bits;
if (to_remove != 0) {
_current_player = OWNER_WATER;
if (CmdFailed(DoCommand(t, 0, FIND_FIRST_BIT(to_remove), DC_EXEC, CMD_REMOVE_SINGLE_RAIL))) return; // not yet floodable
rail_bits = rail_bits & ~to_remove;
if (rail_bits == 0) {
MakeShore(t);
MarkTileDirtyByTile(t);
return;
}
}
if (IsNonContinuousFoundation(GetRailFoundation(tileh, rail_bits))) {
SetRailGroundType(t, RAIL_GROUND_WATER);
MarkTileDirtyByTile(t);
}
}
}
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);
int dx, dy, trdx, trdy;
if (!ValParamTrackOrientation(TrackdirToTrack(*trackdir))) return CMD_ERROR;
/* calculate delta x,y from start to end tile */
dx = ex - x;
dy = ey - y;
/* calculate delta x,y for the first direction */
trdx = _trackdelta[*trackdir].x;
trdy = _trackdelta[*trackdir].y;
if (!IsDiagonalTrackdir(*trackdir)) {
trdx += _trackdelta[*trackdir ^ 1].x;
trdy += _trackdelta[*trackdir ^ 1].y;
}
/* validate the direction */
while (
(trdx <= 0 && dx > 0) ||
(trdx >= 0 && dx < 0) ||
(trdy <= 0 && dy > 0) ||
(trdy >= 0 && dy < 0)
) {
if (!HASBIT(*trackdir, 3)) { // first direction is invalid, try the other
SetBitT(*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 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
*/
static CommandCost CmdRailTrackHelper(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
CommandCost ret, total_cost;
Track track = (Track)GB(p2, 4, 3);
Trackdir trackdir;
byte mode = HASBIT(p2, 7);
RailType railtype = (RailType)GB(p2, 0, 4);
TileIndex end_tile;
if (!ValParamRailtype(railtype) || !ValParamTrackOrientation(track)) return CMD_ERROR;
if (p1 >= MapSize()) return CMD_ERROR;
end_tile = p1;
trackdir = TrackToTrackdir(track);
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
if (CmdFailed(ValidateAutoDrag(&trackdir, tile, end_tile))) return CMD_ERROR;
if (flags & DC_EXEC) SndPlayTileFx(SND_20_SPLAT_2, tile);
for (;;) {
ret = DoCommand(tile, railtype, TrackdirToTrack(trackdir), flags, (mode == 0) ? CMD_BUILD_SINGLE_RAIL : CMD_REMOVE_SINGLE_RAIL);
if (CmdFailed(ret)) {
if ((_error_message != STR_1007_ALREADY_BUILT) && (mode == 0)) break;
_error_message = INVALID_STRING_ID;
} else {
total_cost.AddCost(ret);
}
if (tile == end_tile) break;
tile += ToTileIndexDiff(_trackdelta[trackdir]);
/* toggle railbit for the non-diagonal tracks */
if (!IsDiagonalTrackdir(trackdir)) ToggleBitT(trackdir, 0);
}
return (total_cost.GetCost() == 0) ? CMD_ERROR : total_cost;
}
/** 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
* @see CmdRailTrackHelper
*/
CommandCost CmdBuildRailroadTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
return CmdRailTrackHelper(tile, flags, p1, CLRBIT(p2, 7));
}
/** Build rail on a stretch of track.
* Stub for the unified rail builder/remover
* @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
* @see CmdRailTrackHelper
*/
CommandCost CmdRemoveRailroadTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
return CmdRailTrackHelper(tile, flags, p1, SETBIT(p2, 7));
}
/** Build a train depot
* @param tile position of the train depot
* @param flags operation to perform
* @param p1 rail type
* @param p2 bit 0..1 entrance direction (DiagDirection)
*
* @todo When checking for the tile slope,
* distingush between "Flat land required" and "land sloped in wrong direction"
*/
CommandCost CmdBuildTrainDepot(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
CommandCost cost;
Slope tileh;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
/* check railtype and valid direction for depot (0 through 3), 4 in total */
if (!ValParamRailtype(p1)) return CMD_ERROR;
tileh = GetTileSlope(tile, NULL);
DiagDirection dir = Extract<DiagDirection, 0>(p2);
/* Prohibit construction if
* The tile is non-flat AND
* 1) The AI is "old-school"
* 2) build-on-slopes is disabled
* 3) the tile is steep i.e. spans two height levels
* 4) the exit points in the wrong direction
*/
if (tileh != SLOPE_FLAT && (
_is_old_ai_player ||
!_patches.build_on_slopes ||
IsSteepSlope(tileh) ||
!CanBuildDepotByTileh(dir, tileh)
)) {
return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
}
cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
if (CmdFailed(cost)) return CMD_ERROR;
if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);
Depot *d = new Depot(tile);
if (d == NULL) return CMD_ERROR;
AutoPtrT<Depot> d_auto_delete = d;
if (flags & DC_EXEC) {
MakeRailDepot(tile, _current_player, dir, (RailType)p1);
MarkTileDirtyByTile(tile);
d->town_index = ClosestTownFromTile(tile, (uint)-1)->index;
UpdateSignalsOnSegment(tile, dir);
YapfNotifyTrackLayoutChange(tile, TrackdirToTrack(DiagdirToDiagTrackdir(dir)));
d_auto_delete.Detach();
}
return cost.AddCost(_price.build_train_depot);
}
/** 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 (CTRL-toggle)
* - p1 = (bit 4) - 0 = signals, 1 = semaphores
* @param p2 used for CmdBuildManySignals() to copy direction of first signal
* TODO: p2 should be replaced by two bits for "along" and "against" the track.
*/
CommandCost CmdBuildSingleSignal(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
Track track = (Track)GB(p1, 0, 3);
bool pre_signal = HASBIT(p1, 3);
SignalVariant sigvar = (pre_signal ^ HASBIT(p1, 4)) ? SIG_SEMAPHORE : SIG_ELECTRIC;
CommandCost cost;
if (!ValParamTrackOrientation(track) || !IsTileType(tile, MP_RAILWAY) || !EnsureNoTrainOnTrack(tile, track))
return CMD_ERROR;
/* Protect against invalid signal copying */
if (p2 != 0 && (p2 & SignalOnTrack(track)) == 0) return CMD_ERROR;
/* You can only build signals on plain rail tiles, and the selected track must exist */
if (!IsPlainRailTile(tile) || !HasTrack(tile, track)) return CMD_ERROR;
if (!CheckTileOwnership(tile)) return CMD_ERROR;
_error_message = STR_1005_NO_SUITABLE_RAILROAD_TRACK;
{
/* See if this is a valid track combination for signals, (ie, no overlap) */
TrackBits trackbits = GetTrackBits(tile);
if (KillFirstBit(trackbits) != TRACK_BIT_NONE && /* More than one track present */
trackbits != TRACK_BIT_HORZ &&
trackbits != TRACK_BIT_VERT) {
return CMD_ERROR;
}
}
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
if (!HasSignalOnTrack(tile, track)) {
/* build new signals */
cost = CommandCost(_price.build_signals);
} else {
if (p2 != 0 && sigvar != GetSignalVariant(tile, track)) {
/* convert signals <-> semaphores */
cost = CommandCost(_price.build_signals + _price.remove_signals);
} else {
/* it is free to change orientation/pre-exit-combo signals */
cost = CommandCost();
}
}
if (flags & DC_EXEC) {
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_NORMAL);
SetSignalVariant(tile, track, sigvar);
}
if (p2 == 0) {
if (!HasSignalOnTrack(tile, track)) {
/* build new signals */
SetPresentSignals(tile, GetPresentSignals(tile) | SignalOnTrack(track));
SetSignalType(tile, track, SIGTYPE_NORMAL);
SetSignalVariant(tile, track, sigvar);
} else {
if (pre_signal) {
/* cycle between normal -> pre -> exit -> combo -> ... */
SignalType type = GetSignalType(tile, track);
SetSignalType(tile, track, type == SIGTYPE_COMBO ? SIGTYPE_NORMAL : (SignalType)(type + 1));
} else {
CycleSignalSide(tile, track);
}
}
} else {
/* If CmdBuildManySignals is called with copying signals, just copy the
* direction of the first signal given as parameter by CmdBuildManySignals */
SetPresentSignals(tile, (GetPresentSignals(tile) & ~SignalOnTrack(track)) | (p2 & SignalOnTrack(track)));
SetSignalVariant(tile, track, sigvar);
}
MarkTileDirtyByTile(tile);
SetSignalsOnBothDir(tile, track);
YapfNotifyTrackLayoutChange(tile, track);
}
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 */
uint32 ts = GetTileTrackStatus(tile, TRANSPORT_RAIL, 0);
TrackdirBits trackdirbits = (TrackdirBits)(ts & TRACKDIR_BIT_MASK);
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;
/* Skip to end of tunnel or bridge */
if (IsBridge(tile)) {
if (GetBridgeTransportType(tile) != TRANSPORT_RAIL) return false;
if (GetBridgeRampDirection(tile) != TrackdirToExitdir(trackdir)) return false;
tile = GetOtherBridgeEnd(tile);
} else {
if (GetTunnelTransportType(tile) != TRANSPORT_RAIL) return false;
if (GetTunnelDirection(tile) != TrackdirToExitdir(trackdir)) return false;
tile = GetOtherTunnelEnd(tile);
}
signal_ctr += 2 + DistanceMax(orig_tile, tile) * 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 24-31) - user defined signals_density
*/
static CommandCost CmdSignalTrackHelper(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
CommandCost ret, total_cost;
int signal_ctr;
byte signals;
bool error = true;
TileIndex end_tile;
TileIndex start_tile = tile;
Track track = (Track)GB(p2, 0, 3);
bool mode = HASBIT(p2, 3);
bool semaphores = HASBIT(p2, 4);
bool remove = HASBIT(p2, 5);
bool autofill = HASBIT(p2, 6);
Trackdir trackdir = TrackToTrackdir(track);
byte signal_density = GB(p2, 24, 8);
if (p1 >= MapSize()) return CMD_ERROR;
end_tile = p1;
if (signal_density == 0 || signal_density > 20) return CMD_ERROR;
if (!IsTileType(tile, MP_RAILWAY)) return CMD_ERROR;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
/* for vertical/horizontal tracks, double the given signals density
* since the original amount will be too dense (shorter tracks) */
signal_density *= 2;
if (CmdFailed(ValidateAutoDrag(&trackdir, tile, end_tile))) return CMD_ERROR;
track = TrackdirToTrack(trackdir); /* trackdir might have changed, keep track in sync */
Trackdir start_trackdir = trackdir;
/* Autofill must start on a valid track to be able to avoid loops */
if (autofill && !HasTrack(tile, track)) return CMD_ERROR;
/* copy the signal-style of the first rail-piece if existing */
if (HasSignals(tile)) {
signals = GetPresentSignals(tile) & SignalOnTrack(track);
if (signals == 0) signals = SignalOnTrack(track); /* Can this actually occur? */
/* copy signal/semaphores style (independent of CTRL) */
semaphores = GetSignalVariant(tile, track) != SIG_ELECTRIC;
} else { // no signals exist, drag a two-way signal stretch
signals = 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 - patch setting to put signal on every Nth tile (double space on |, -- tracks)
**********
* trackdir - trackdir to build with autorail
* semaphores - semaphores or signals
* signals - is there a signal/semaphore on the first tile, copy its style (two-way/single-way)
* and convert all others to semaphore/signal
* remove - 1 remove signals, 0 build signals */
signal_ctr = 0;
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);
/* 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);
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 (CmdSucceeded(ret)) {
error = false;
total_cost.AddCost(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 {
ToggleBitT(trackdir, 0);
}
}
}
return error ? CMD_ERROR : total_cost;
}
/** 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 24-31) - user defined signals_density
* @see CmdSignalTrackHelper
*/
CommandCost CmdBuildSignalTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
return CmdSignalTrackHelper(tile, flags, p1, p2);
}
/** Remove signals
* @param tile coordinates where signal is being deleted from
* @param 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
*/
CommandCost CmdRemoveSingleSignal(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
Track track = (Track)GB(p1, 0, 3);
if (!ValParamTrackOrientation(track) ||
!IsTileType(tile, MP_RAILWAY) ||
!EnsureNoTrainOnTrack(tile, track) ||
!HasSignalOnTrack(tile, track)) {
return CMD_ERROR;
}
/* Only water can remove signals from anyone */
if (_current_player != OWNER_WATER && !CheckTileOwnership(tile)) return CMD_ERROR;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
/* Do it? */
if (flags & DC_EXEC) {
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
}
SetSignalsOnBothDir(tile, track);
YapfNotifyTrackLayoutChange(tile, track);
MarkTileDirtyByTile(tile);
}
return CommandCost(_price.remove_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 24-31) - user defined signals_density
* @see CmdSignalTrackHelper
*/
CommandCost CmdRemoveSignalTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
return CmdSignalTrackHelper(tile, flags, p1, SETBIT(p2, 5)); // bit 5 is remove bit
}
typedef CommandCost DoConvertRailProc(TileIndex tile, RailType totype, bool exec);
void *UpdateTrainPowerProc(Vehicle *v, void *data)
{
/* Similiar checks as in TrainPowerChanged() */
if (v->type == VEH_TRAIN && v->tile == *(TileIndex*)data && !IsArticulatedPart(v)) {
const RailVehicleInfo *rvi = RailVehInfo(v->engine_type);
if (GetVehicleProperty(v, 0x0B, rvi->power) != 0) TrainPowerChanged(v->First());
}
return NULL;
}
/**
* Switches the rail type.
* Railtypes are stored on a per-tile basis, not on a per-track basis, so
* all the tracks in the given tile will be converted.
* @param tile The tile on which the railtype is to be convert.
* @param totype The railtype we want to convert to
* @param exec Switches between test and execute mode
* @return The cost and state of the operation
* @retval CMD_ERROR An error occured during the operation.
*/
static CommandCost DoConvertRail(TileIndex tile, RailType totype, bool exec)
{
/* change type. */
if (exec) {
SetRailType(tile, totype);
MarkTileDirtyByTile(tile);
/* notify YAPF about the track layout change */
TrackBits tracks = GetTrackBits(tile);
while (tracks != TRACK_BIT_NONE) {
YapfNotifyTrackLayoutChange(tile, RemoveFirstTrack(&tracks));
}
if (IsTileDepotType(tile, TRANSPORT_RAIL)) {
/* Update build vehicle window related to this depot */
InvalidateWindowData(WC_VEHICLE_DEPOT, tile);
InvalidateWindowData(WC_BUILD_VEHICLE, tile);
}
/* update power of train engines on this tile */
VehicleFromPos(tile, &tile, UpdateTrainPowerProc);
}
return CommandCost(RailBuildCost(totype) / 2);
}
extern CommandCost DoConvertStationRail(TileIndex tile, RailType totype, bool exec);
extern CommandCost DoConvertStreetRail(TileIndex tile, RailType totype, bool exec);
extern CommandCost DoConvertTunnelBridgeRail(TileIndex tile, RailType totype, bool exec);
/** Convert one rail type to the other. You can convert normal rail to
* monorail/maglev easily or vice-versa.
* @param tile end tile of rail conversion drag
* @param flags operation to perform
* @param p1 start tile of drag
* @param p2 new railtype to convert to
*/
CommandCost CmdConvertRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
CommandCost ret, cost;
Money money;
int ex;
int ey;
int sx, sy, x, y;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
if (!ValParamRailtype(p2)) return CMD_ERROR;
if (p1 >= MapSize()) return CMD_ERROR;
/* make sure sx,sy are smaller than ex,ey */
ex = TileX(tile);
ey = TileY(tile);
sx = TileX(p1);
sy = TileY(p1);
if (ex < sx) Swap(ex, sx);
if (ey < sy) Swap(ey, sy);
money = GetAvailableMoneyForCommand();
for (x = sx; x <= ex; ++x) {
for (y = sy; y <= ey; ++y) {
TileIndex tile = TileXY(x, y);
DoConvertRailProc *proc;
RailType totype = (RailType)p2;
switch (GetTileType(tile)) {
case MP_RAILWAY: proc = DoConvertRail; break;
case MP_STATION: proc = DoConvertStationRail; break;
case MP_ROAD: proc = DoConvertStreetRail; break;
case MP_TUNNELBRIDGE: proc = DoConvertTunnelBridgeRail; break;
default: continue;
}
/* It is possible that 'type' is invalid when there is no rail on the tile,
* but this situation will be detected in proc()
*/
RailType type = GetRailType(tile);
/* Not own tile or track is already converted */
if ((!CheckTileOwnership(tile) || type == totype) ||
/* 'hidden' elrails can't be downgraded to normal rail when elrails are disabled */
(_patches.disable_elrails && totype == RAILTYPE_RAIL && type == RAILTYPE_ELECTRIC) ||
/* Vehicle on a tile while not converting Rail <-> ElRail */
(!IsCompatibleRail(type, totype) && !EnsureNoVehicleOnGround(tile))) {
ret = CMD_ERROR;
continue;
}
ret = proc(tile, totype, false);
if (CmdFailed(ret)) continue;
if (flags & DC_EXEC) {
money -= ret.GetCost();
if (money < 0) {
_additional_cash_required = ret.GetCost();
return cost;
}
proc(tile, totype, true);
}
cost.AddCost(ret);
}
}
return (cost.GetCost() == 0) ? ret : cost;
}
static CommandCost RemoveTrainDepot(TileIndex tile, uint32 flags)
{
if (!CheckTileOwnership(tile) && _current_player != OWNER_WATER)
return CMD_ERROR;
if (!EnsureNoVehicleOnGround(tile))
return CMD_ERROR;
if (flags & DC_EXEC) {
DiagDirection dir = GetRailDepotDirection(tile);
DoClearSquare(tile);
delete GetDepotByTile(tile);
UpdateSignalsOnSegment(tile, dir);
YapfNotifyTrackLayoutChange(tile, TrackdirToTrack(DiagdirToDiagTrackdir(dir)));
}
return CommandCost(_price.remove_train_depot);
}
static CommandCost ClearTile_Track(TileIndex tile, byte flags)
{
CommandCost cost;
CommandCost ret;
if (flags & DC_AUTO) {
if (!IsTileOwner(tile, _current_player))
return_cmd_error(STR_1024_AREA_IS_OWNED_BY_ANOTHER);
if (IsPlainRailTile(tile)) {
return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);
} else {
return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED);
}
}
switch (GetRailTileType(tile)) {
case RAIL_TILE_SIGNALS:
case RAIL_TILE_NORMAL: {
bool water_ground = (GetRailGroundType(tile) == RAIL_GROUND_WATER);
TrackBits tracks = GetTrackBits(tile);
while (tracks != TRACK_BIT_NONE) {
Track track = RemoveFirstTrack(&tracks);
ret = DoCommand(tile, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
if (CmdFailed(ret)) return CMD_ERROR;
cost.AddCost(ret);
}
if (water_ground) {
/* The track was removed, and left a coast tile. Now also clear the water. */
if (flags & DC_EXEC) DoClearSquare(tile);
cost.AddCost(_price.clear_water);
}
return cost;
}
case RAIL_TILE_DEPOT:
return RemoveTrainDepot(tile, flags);
case RAIL_TILE_WAYPOINT:
return RemoveTrainWaypoint(tile, flags, false);
default:
return CMD_ERROR;
}
}
#include "table/track_land.h"
/**
* Get surface height in point (x,y)
* On tiles with halftile foundations move (x,y) to a save 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 = (_opt.road_side != 0) && _patches.signal_side;
static const Point SignalPositions[2][12] = {
{ /* Signals on the left side */
/* LEFT LEFT RIGHT RIGHT UPPER UPPER */
{ 8, 5}, {14, 1}, { 1, 14}, { 9, 11}, { 1, 0}, { 3, 10},
/* LOWER LOWER X X Y Y */
{11, 4}, {14, 14}, {11, 3}, { 4, 13}, { 3, 4}, {11, 13}
}, { /* Signals on the right side */
/* LEFT LEFT RIGHT RIGHT UPPER UPPER */
{14, 1}, {12, 10}, { 4, 6}, { 1, 14}, {10, 4}, { 0, 1},
/* LOWER LOWER X X Y Y */
{14, 14}, { 5, 12}, {11, 13}, { 4, 3}, {13, 4}, { 3, 11}
}
};
static const SpriteID SignalBase[2][2][4] = {
{ /* Signals on left side */
{ 0x4FB, 0x1323, 0x1333, 0x1343}, /* light signals */
{ 0x1353, 0x1363, 0x1373, 0x1383} /* semaphores */
}, { /* Signals on right side */
{ 0x4FB, 0x1323, 0x1333, 0x1343}, /* light signals */
{ 0x1446, 0x1456, 0x1466, 0x1476} /* semaphores */
/* | | | | */
/* normal, entry, exit, combo */
}
};
uint x = TileX(tile) * TILE_SIZE + SignalPositions[side][pos].x;
uint y = TileY(tile) * TILE_SIZE + SignalPositions[side][pos].y;
SpriteID sprite;
if (GetSignalType(tile, track) == SIGTYPE_NORMAL && GetSignalVariant(tile, track) == SIG_ELECTRIC) {
sprite = SignalBase[side][GetSignalVariant(tile, track)][GetSignalType(tile, track)] + image + condition;
} else {
sprite = SPR_SIGNALS_BASE + (GetSignalType(tile, track) - 1) * 16 + GetSignalVariant(tile, track) * 64 + image + condition;
}
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 image = SPR_TRACK_FENCE_FLAT_X;
if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? SPR_TRACK_FENCE_SLOPE_SW : SPR_TRACK_FENCE_SLOPE_NE;
AddSortableSpriteToDraw(image, _drawtile_track_palette,
ti->x, ti->y + 1, 16, 1, 4, ti->z);
}
static void DrawTrackFence_SE(const TileInfo *ti)
{
SpriteID image = SPR_TRACK_FENCE_FLAT_X;
if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? SPR_TRACK_FENCE_SLOPE_SW : SPR_TRACK_FENCE_SLOPE_NE;
AddSortableSpriteToDraw(image, _drawtile_track_palette,
ti->x, ti->y + TILE_SIZE - 1, 16, 1, 4, ti->z);
}
static void DrawTrackFence_NW_SE(const TileInfo *ti)
{
DrawTrackFence_NW(ti);
DrawTrackFence_SE(ti);
}
static void DrawTrackFence_NE(const TileInfo *ti)
{
SpriteID image = SPR_TRACK_FENCE_FLAT_Y;
if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? SPR_TRACK_FENCE_SLOPE_SE : SPR_TRACK_FENCE_SLOPE_NW;
AddSortableSpriteToDraw(image, _drawtile_track_palette,
ti->x + 1, ti->y, 1, 16, 4, ti->z);
}
static void DrawTrackFence_SW(const TileInfo *ti)
{
SpriteID image = SPR_TRACK_FENCE_FLAT_Y;
if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? SPR_TRACK_FENCE_SLOPE_SE : SPR_TRACK_FENCE_SLOPE_NW;
AddSortableSpriteToDraw(image, _drawtile_track_palette,
ti->x + TILE_SIZE - 1, ti->y, 1, 16, 4, ti->z);
}
static void DrawTrackFence_NE_SW(const TileInfo *ti)
{
DrawTrackFence_NE(ti);
DrawTrackFence_SW(ti);
}
/**
* Draw fence at eastern side of track.
*/
static void DrawTrackFence_NS_1(const TileInfo *ti)
{
int z = ti->z;
if (ti->tileh & SLOPE_W) z += TILE_HEIGHT;
if (IsSteepSlope(ti->tileh)) z += TILE_HEIGHT;
AddSortableSpriteToDraw(SPR_TRACK_FENCE_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)
{
int z = ti->z;
if (ti->tileh & SLOPE_E) z += TILE_HEIGHT;
if (IsSteepSlope(ti->tileh)) z += TILE_HEIGHT;
AddSortableSpriteToDraw(SPR_TRACK_FENCE_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)
{
int z = ti->z;
if (ti->tileh & SLOPE_N) z += TILE_HEIGHT;
if (IsSteepSlope(ti->tileh)) z += TILE_HEIGHT;
AddSortableSpriteToDraw(SPR_TRACK_FENCE_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)
{
int z = ti->z;
if (ti->tileh & SLOPE_S) z += TILE_HEIGHT;
if (IsSteepSlope(ti->tileh)) z += TILE_HEIGHT;
AddSortableSpriteToDraw(SPR_TRACK_FENCE_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)
{
switch (GetRailGroundType(ti->tile)) {
case RAIL_GROUND_FENCE_NW: DrawTrackFence_NW(ti); break;
case RAIL_GROUND_FENCE_SE: DrawTrackFence_SE(ti); break;
case RAIL_GROUND_FENCE_SENW: DrawTrackFence_NW_SE(ti); break;
case RAIL_GROUND_FENCE_NE: DrawTrackFence_NE(ti); break;
case RAIL_GROUND_FENCE_SW: DrawTrackFence_SW(ti); break;
case RAIL_GROUND_FENCE_NESW: DrawTrackFence_NE_SW(ti); break;
case RAIL_GROUND_FENCE_VERT1: DrawTrackFence_NS_1(ti); break;
case RAIL_GROUND_FENCE_VERT2: DrawTrackFence_NS_2(ti); break;
case RAIL_GROUND_FENCE_HORIZ1: DrawTrackFence_WE_1(ti); break;
case RAIL_GROUND_FENCE_HORIZ2: DrawTrackFence_WE_2(ti); break;
case RAIL_GROUND_WATER:
switch (GetHalftileSlopeCorner(ti->tileh)) {
case CORNER_W: DrawTrackFence_NS_1(ti); break;
case CORNER_S: DrawTrackFence_WE_2(ti); break;
case CORNER_E: DrawTrackFence_NS_2(ti); break;
case CORNER_N: DrawTrackFence_WE_1(ti); break;
default: NOT_REACHED();
}
break;
default: break;
}
}
/**
* 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));
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;
SpriteID pal = PAL_NONE;
bool junction = false;
/* Select the sprite to use. */
if (track == 0) {
/* Clear ground (only track on halftile foundation) */
if (rgt == RAIL_GROUND_WATER) {
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_SNOWY_TILE; break;
default: image = SPR_FLAT_GRASS_TILE; break;
}
image += _tileh_to_sprite[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: NOT_REACHED();
default: break;
}
}
DrawGroundSprite(image, pal);
/* Draw track pieces individually for junction tiles */
if (junction) {
if (track & TRACK_BIT_X) DrawGroundSprite(rti->base_sprites.single_y, PAL_NONE);
if (track & TRACK_BIT_Y) DrawGroundSprite(rti->base_sprites.single_x, 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);
}
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: image += rti->snow_offset; break;
default: break;
}
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
};
DrawGroundSprite(image, pal, &(_halftile_sub_sprite[halftile_corner]));
}
}
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 - 0x4FB, z)
if (!(rails & TRACK_BIT_Y)) {
if (!(rails & TRACK_BIT_X)) {
if (rails & TRACK_BIT_LEFT) {
MAYBE_DRAW_SIGNAL(2, 0x509, 0, TRACK_LEFT);
MAYBE_DRAW_SIGNAL(3, 0x507, 1, TRACK_LEFT);
}
if (rails & TRACK_BIT_RIGHT) {
MAYBE_DRAW_SIGNAL(0, 0x509, 2, TRACK_RIGHT);
MAYBE_DRAW_SIGNAL(1, 0x507, 3, TRACK_RIGHT);
}
if (rails & TRACK_BIT_UPPER) {
MAYBE_DRAW_SIGNAL(3, 0x505, 4, TRACK_UPPER);
MAYBE_DRAW_SIGNAL(2, 0x503, 5, TRACK_UPPER);
}
if (rails & TRACK_BIT_LOWER) {
MAYBE_DRAW_SIGNAL(1, 0x505, 6, TRACK_LOWER);
MAYBE_DRAW_SIGNAL(0, 0x503, 7, TRACK_LOWER);
}
} else {
MAYBE_DRAW_SIGNAL(3, 0x4FB, 8, TRACK_X);
MAYBE_DRAW_SIGNAL(2, 0x4FD, 9, TRACK_X);
}
} else {
MAYBE_DRAW_SIGNAL(3, 0x4FF, 10, TRACK_Y);
MAYBE_DRAW_SIGNAL(2, 0x501, 11, TRACK_Y);
}
}
static void DrawTile_Track(TileInfo *ti)
{
const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
SpriteID image;
_drawtile_track_palette = PLAYER_SPRITE_COLOR(GetTileOwner(ti->tile));
if (IsPlainRailTile(ti->tile)) {
TrackBits rails = GetTrackBits(ti->tile);
DrawTrackBits(ti, rails);
if (HASBIT(_display_opt, DO_FULL_DETAIL)) DrawTrackDetails(ti);
if (GetRailType(ti->tile) == RAILTYPE_ELECTRIC) DrawCatenary(ti);
if (HasSignals(ti->tile)) DrawSignals(ti->tile, rails);
} else {
/* draw depot/waypoint */
const DrawTileSprites* dts;
const DrawTileSeqStruct* dtss;
uint32 relocation;
if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
if (IsRailDepot(ti->tile)) {
dts = &_depot_gfx_table[GetRailDepotDirection(ti->tile)];
relocation = rti->total_offset;
image = dts->ground_sprite;
if (image != SPR_FLAT_GRASS_TILE) image += rti->total_offset;
/* adjust ground tile for desert
* don't adjust for snow, because snow in depots looks weird */
if (IsSnowRailGround(ti->tile) && _opt.landscape == LT_TROPIC) {
if (image != SPR_FLAT_GRASS_TILE) {
image += rti->snow_offset; // tile with tracks
} else {
image = SPR_FLAT_SNOWY_TILE; // flat ground
}
}
} else {
/* look for customization */
byte stat_id = GetWaypointByTile(ti->tile)->stat_id;
const StationSpec *statspec = GetCustomStationSpec(STAT_CLASS_WAYP, stat_id);
if (statspec != NULL) {
/* emulate station tile - open with building */
const Station* st = ComposeWaypointStation(ti->tile);
uint gfx = 2;
if (HASBIT(statspec->callbackmask, CBM_STATION_SPRITE_LAYOUT)) {
uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
if (callback != CALLBACK_FAILED) gfx = callback;
}
if (statspec->renderdata == NULL) {
dts = GetStationTileLayout(STATION_RAIL, gfx);
} else {
dts = &statspec->renderdata[(gfx < statspec->tiles ? gfx : 0) + GetWaypointAxis(ti->tile)];
}
if (dts != NULL && dts->seq != NULL) {
relocation = GetCustomStationRelocation(statspec, st, ti->tile);
image = dts->ground_sprite;
if (HASBIT(image, SPRITE_MODIFIER_USE_OFFSET)) {
image += GetCustomStationGroundRelocation(statspec, st, ti->tile);
image += rti->custom_ground_offset;
} else {
image += rti->total_offset;
}
} else {
goto default_waypoint;
}
} else {
default_waypoint:
/* There is no custom layout, fall back to the default graphics */
dts = &_waypoint_gfx_table[GetWaypointAxis(ti->tile)];
relocation = 0;
image = dts->ground_sprite + rti->total_offset;
if (IsSnowRailGround(ti->tile)) image += rti->snow_offset;
}
}
DrawGroundSprite(image, PAL_NONE);
if (GetRailType(ti->tile) == RAILTYPE_ELECTRIC) DrawCatenary(ti);
foreach_draw_tile_seq(dtss, dts->seq) {
SpriteID image = dtss->image;
SpriteID pal;
/* Unlike stations, our default waypoint has no variation for
* different railtype, so don't use the railtype offset if
* no relocation is set */
if (HASBIT(image, SPRITE_MODIFIER_USE_OFFSET)) {
image += rti->total_offset;
} else {
image += relocation;
}
if (!IsTransparencySet(TO_BUILDINGS) && HASBIT(image, PALETTE_MODIFIER_COLOR)) {
pal = _drawtile_track_palette;
} else {
pal = dtss->pal;
}
if ((byte)dtss->delta_z != 0x80) {
AddSortableSpriteToDraw(
image, pal,
ti->x + dtss->delta_x, ti->y + dtss->delta_y,
dtss->size_x, dtss->size_y,
dtss->size_z, ti->z + dtss->delta_z,
IsTransparencySet(TO_BUILDINGS)
);
} else {
AddChildSpriteScreen(image, pal, dtss->delta_x, dtss->delta_y);
}
}
}
DrawBridgeMiddle(ti);
}
static void DrawTileSequence(int x, int y, SpriteID ground, const DrawTileSeqStruct* dtss, uint32 offset)
{
SpriteID palette = PLAYER_SPRITE_COLOR(_local_player);
DrawSprite(ground, PAL_NONE, x, y);
for (; dtss->image != 0; dtss++) {
Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z);
SpriteID image = dtss->image + offset;
DrawSprite(image, HASBIT(image, PALETTE_MODIFIER_COLOR) ? palette : PAL_NONE, x + pt.x, y + pt.y);
}
}
void DrawTrainDepotSprite(int x, int y, int dir, RailType railtype)
{
const DrawTileSprites* dts = &_depot_gfx_table[dir];
SpriteID image = dts->ground_sprite;
uint32 offset = GetRailTypeInfo(railtype)->total_offset;
if (image != SPR_FLAT_GRASS_TILE) image += offset;
DrawTileSequence(x + 33, y + 17, image, dts->seq, offset);
}
void DrawDefaultWaypointSprite(int x, int y, RailType railtype)
{
uint32 offset = GetRailTypeInfo(railtype)->total_offset;
const DrawTileSprites* dts = &_waypoint_gfx_table[AXIS_X];
DrawTileSequence(x, y, dts->ground_sprite + offset, dts->seq, 0);
}
struct SetSignalsData {
int cur;
int cur_stack;
bool stop;
bool has_presignal;
/* presignal info */
int presignal_exits;
int presignal_exits_free;
/* these are used to keep track of the signals that change. */
TrackdirByte bit[NUM_SSD_ENTRY];
TileIndex tile[NUM_SSD_ENTRY];
/* these are used to keep track of the stack that modifies presignals recursively */
TileIndex next_tile[NUM_SSD_STACK];
DiagDirectionByte next_dir[NUM_SSD_STACK];
};
static bool SetSignalsEnumProc(TileIndex tile, void* data, Trackdir trackdir, uint length, byte* state)
{
SetSignalsData* ssd = (SetSignalsData*)data;
Track track = TrackdirToTrack(trackdir);
if (!IsTileType(tile, MP_RAILWAY)) return false;
/* the tile has signals? */
if (HasSignalOnTrack(tile, track)) {
if (HasSignalOnTrackdir(tile, ReverseTrackdir(trackdir))) {
/* yes, add the signal to the list of signals */
if (ssd->cur != NUM_SSD_ENTRY) {
ssd->tile[ssd->cur] = tile; // remember the tile index
ssd->bit[ssd->cur] = trackdir; // and the controlling bit number
ssd->cur++;
}
/* remember if this block has a presignal. */
ssd->has_presignal |= IsPresignalEntry(tile, track);
}
if (HasSignalOnTrackdir(tile, trackdir) && IsPresignalExit(tile, track)) {
/* this is an exit signal that points out from the segment */
ssd->presignal_exits++;
if (GetSignalStateByTrackdir(tile, trackdir) != SIGNAL_STATE_RED)
ssd->presignal_exits_free++;
}
return true;
} else if (IsTileDepotType(tile, TRANSPORT_RAIL)) {
return true; // don't look further if the tile is a depot
}
return false;
}
/* Struct to parse data from VehicleFromPos to SignalVehicleCheckProc */
struct SignalVehicleCheckStruct {
TileIndex tile;
uint track;
};
static void *SignalVehicleCheckProc(Vehicle *v, void *data)
{
const SignalVehicleCheckStruct* dest = (SignalVehicleCheckStruct*)data;
if (v->type != VEH_TRAIN) return NULL;
/* Wrong tile, or no train? Not a match */
if (v->tile != dest->tile) return NULL;
/* Are we on the same piece of track? */
if (dest->track & v->u.rail.track * 0x101) return v;
return NULL;
}
/* Special check for SetSignalsAfterProc, to see if there is a vehicle on this tile */
static bool SignalVehicleCheck(TileIndex tile, uint track)
{
SignalVehicleCheckStruct dest;
dest.tile = tile;
dest.track = track;
/* Locate vehicles in tunnels or on bridges */
if (IsTunnelTile(tile) || IsBridgeTile(tile)) {
TileIndex end;
DiagDirection direction;
if (IsTunnelTile(tile)) {
end = GetOtherTunnelEnd(tile);
direction = GetTunnelDirection(tile);
} else {
end = GetOtherBridgeEnd(tile);
direction = GetBridgeRampDirection(tile);
}
dest.track = 1 << (direction & 1); // get the trackbit the vehicle would have if it has not entered the tunnel yet (ie is still visible)
/* check for a vehicle with that trackdir on the start tile of the tunnel */
if (VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL) return true;
/* check for a vehicle with that trackdir on the end tile of the tunnel */
if (VehicleFromPos(end, &dest, SignalVehicleCheckProc) != NULL) return true;
/* now check all tiles from start to end for a warping vehicle */
dest.track = 0x40; //Vehicle inside a tunnel or on a bridge
if (VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL) return true;
if (VehicleFromPos(end, &dest, SignalVehicleCheckProc) != NULL) return true;
/* no vehicle found */
return false;
}
return VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL;
}
static void SetSignalsAfterProc(TrackPathFinder *tpf)
{
SetSignalsData *ssd = (SetSignalsData*)tpf->userdata;
const TrackPathFinderLink* link;
uint offs;
uint i;
ssd->stop = false;
/* Go through all the PF tiles */
for (i = 0; i < lengthof(tpf->hash_head); i++) {
/* Empty hash item */
if (tpf->hash_head[i] == 0) continue;
/* If 0x8000 is not set, there is only 1 item */
if (!(tpf->hash_head[i] & 0x8000)) {
/* Check if there is a vehicle on this tile */
if (SignalVehicleCheck(tpf->hash_tile[i], tpf->hash_head[i])) {
ssd->stop = true;
return;
}
} else {
/* There are multiple items, where hash_tile points to the first item in the list */
offs = tpf->hash_tile[i];
do {
/* Find the next item */
link = PATHFIND_GET_LINK_PTR(tpf, offs);
/* Check if there is a vehicle on this tile */
if (SignalVehicleCheck(link->tile, link->flags)) {
ssd->stop = true;
return;
}
/* Goto the next item */
} while ((offs = link->next) != 0xFFFF);
}
}
}
static void ChangeSignalStates(SetSignalsData *ssd)
{
int i;
/* thinking about presignals...
* the presignal is green if,
* if no train is in the segment AND
* there is at least one green exit signal OR
* there are no exit signals in the segment */
/* then mark the signals in the segment accordingly */
for (i = 0; i != ssd->cur; i++) {
TileIndex tile = ssd->tile[i];
byte bit = SignalAgainstTrackdir(ssd->bit[i]);
uint signals = GetSignalStates(tile);
Track track = TrackdirToTrack(ssd->bit[i]);
/* presignals don't turn green if there is at least one presignal exit and none are free */
if (IsPresignalEntry(tile, track)) {
int ex = ssd->presignal_exits, exfree = ssd->presignal_exits_free;
/* subtract for dual combo signals so they don't count themselves */
if (IsPresignalExit(tile, track) && HasSignalOnTrackdir(tile, ssd->bit[i])) {
ex--;
if (GetSignalStateByTrackdir(tile, ssd->bit[i]) != SIGNAL_STATE_RED) exfree--;
}
/* if we have exits and none are free, make red. */
if (ex && !exfree) goto make_red;
}
/* check if the signal is unaffected. */
if (ssd->stop) {
make_red:
/* turn red */
if ((bit & signals) == 0) continue;
} else {
/* turn green */
if ((bit & signals) != 0) continue;
}
/* Update signals on the other side of this exit-combo signal; it changed. */
if (IsPresignalExit(tile, track)) {
if (ssd->cur_stack != NUM_SSD_STACK) {
ssd->next_tile[ssd->cur_stack] = tile;
ssd->next_dir[ssd->cur_stack] = TrackdirToExitdir(ssd->bit[i]);
ssd->cur_stack++;
} else {
DEBUG(misc, 0, "NUM_SSD_STACK too small"); /// @todo WTF is this???
}
}
/* it changed, so toggle it */
SetSignalStates(tile, signals ^ bit);
MarkTileDirtyByTile(tile);
}
}
bool UpdateSignalsOnSegment(TileIndex tile, DiagDirection direction)
{
SetSignalsData ssd;
int result = -1;
ssd.cur_stack = 0;
for (;;) {
/* go through one segment and update all signals pointing into that segment. */
ssd.cur = ssd.presignal_exits = ssd.presignal_exits_free = 0;
ssd.has_presignal = false;
FollowTrack(tile, 0xC000 | TRANSPORT_RAIL, 0, direction, SetSignalsEnumProc, SetSignalsAfterProc, &ssd);
ChangeSignalStates(&ssd);
/* remember the result only for the first iteration. */
if (result < 0) {
/* stay in depot while segment is occupied or while all presignal exits are blocked */
result = ssd.stop || (ssd.presignal_exits > 0 && ssd.presignal_exits_free == 0);
}
/* if any exit signals were changed, we need to keep going to modify the stuff behind those. */
if (ssd.cur_stack == 0) break;
/* one or more exit signals were changed, so we need to update another segment too. */
tile = ssd.next_tile[--ssd.cur_stack];
direction = ssd.next_dir[ssd.cur_stack];
}
return result != 0;
}
void SetSignalsOnBothDir(TileIndex tile, byte track)
{
static const DiagDirection _search_dir_1[] = {
DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_SW, DIAGDIR_SE
};
static const DiagDirection _search_dir_2[] = {
DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NE
};
UpdateSignalsOnSegment(tile, _search_dir_1[track]);
UpdateSignalsOnSegment(tile, _search_dir_2[track]);
}
static uint GetSlopeZ_Track(TileIndex tile, uint x, uint y)
{
uint z;
Slope tileh = GetTileSlope(tile, &z);
if (tileh == SLOPE_FLAT) return z;
if (IsPlainRailTile(tile)) {
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 IsPlainRailTile(tile) ? GetRailFoundation(tileh, GetTrackBits(tile)) : FlatteningFoundation(tileh);
}
static void GetAcceptedCargo_Track(TileIndex tile, AcceptedCargo ac)
{
/* not used */
}
static void AnimateTile_Track(TileIndex tile)
{
/* not used */
}
static void TileLoop_Track(TileIndex tile)
{
RailGroundType old_ground = GetRailGroundType(tile);
RailGroundType new_ground;
if (old_ground == RAIL_GROUND_WATER) {
TileLoop_Water(tile);
return;
}
switch (_opt.landscape) {
case LT_ARCTIC:
if (GetTileZ(tile) > GetSnowLine()) {
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;
}
if (!IsPlainRailTile(tile)) return;
new_ground = RAIL_GROUND_GRASS;
if (old_ground != RAIL_GROUND_BARREN) { // wait until bottom is green
/* determine direction of fence */
TrackBits rail = GetTrackBits(tile);
switch (rail) {
case TRACK_BIT_UPPER: new_ground = RAIL_GROUND_FENCE_HORIZ1; break;
case TRACK_BIT_LOWER: new_ground = RAIL_GROUND_FENCE_HORIZ2; break;
case TRACK_BIT_LEFT: new_ground = RAIL_GROUND_FENCE_VERT1; break;
case TRACK_BIT_RIGHT: new_ground = RAIL_GROUND_FENCE_VERT2; break;
default: {
PlayerID owner = GetTileOwner(tile);
if (rail == (TRACK_BIT_LOWER | TRACK_BIT_RIGHT) || (
(rail & TRACK_BIT_3WAY_NW) == 0 &&
(rail & TRACK_BIT_X)
)) {
TileIndex n = tile + TileDiffXY(0, -1);
TrackBits nrail = GetTrackBits(n);
if (!IsTileType(n, MP_RAILWAY) ||
!IsTileOwner(n, owner) ||
nrail == TRACK_BIT_UPPER ||
nrail == TRACK_BIT_LEFT) {
new_ground = RAIL_GROUND_FENCE_NW;
}
}
if (rail == (TRACK_BIT_UPPER | TRACK_BIT_LEFT) || (
(rail & TRACK_BIT_3WAY_SE) == 0 &&
(rail & TRACK_BIT_X)
)) {
TileIndex n = tile + TileDiffXY(0, 1);
TrackBits nrail = GetTrackBits(n);
if (!IsTileType(n, MP_RAILWAY) ||
!IsTileOwner(n, owner) ||
nrail == TRACK_BIT_LOWER ||
nrail == TRACK_BIT_RIGHT) {
new_ground = (new_ground == RAIL_GROUND_FENCE_NW) ?
RAIL_GROUND_FENCE_SENW : RAIL_GROUND_FENCE_SE;
}
}
if (rail == (TRACK_BIT_LOWER | TRACK_BIT_LEFT) || (
(rail & TRACK_BIT_3WAY_NE) == 0 &&
(rail & TRACK_BIT_Y)
)) {
TileIndex n = tile + TileDiffXY(-1, 0);
TrackBits nrail = GetTrackBits(n);
if (!IsTileType(n, MP_RAILWAY) ||
!IsTileOwner(n, owner) ||
nrail == TRACK_BIT_UPPER ||
nrail == TRACK_BIT_RIGHT) {
new_ground = RAIL_GROUND_FENCE_NE;
}
}
if (rail == (TRACK_BIT_UPPER | TRACK_BIT_RIGHT) || (
(rail & TRACK_BIT_3WAY_SW) == 0 &&
(rail & TRACK_BIT_Y)
)) {
TileIndex n = tile + TileDiffXY(1, 0);
TrackBits nrail = GetTrackBits(n);
if (!IsTileType(n, MP_RAILWAY) ||
!IsTileOwner(n, owner) ||
nrail == TRACK_BIT_LOWER ||
nrail == TRACK_BIT_LEFT) {
new_ground = (new_ground == RAIL_GROUND_FENCE_NE) ?
RAIL_GROUND_FENCE_NESW : RAIL_GROUND_FENCE_SW;
}
}
break;
}
}
}
set_ground:
if (old_ground != new_ground) {
SetRailGroundType(tile, new_ground);
MarkTileDirtyByTile(tile);
}
}
static uint32 GetTileTrackStatus_Track(TileIndex tile, TransportType mode, uint sub_mode)
{
if (mode != TRANSPORT_RAIL) return 0;
switch (GetRailTileType(tile)) {
default: NOT_REACHED();
case RAIL_TILE_NORMAL: {
TrackBits rails = GetTrackBits(tile);
uint32 ret = rails * 0x101;
return (rails == TRACK_BIT_CROSS) ? ret | 0x40 : ret;
}
case RAIL_TILE_SIGNALS: {
uint32 ret = GetTrackBits(tile) * 0x101;
byte a = GetPresentSignals(tile);
uint b = GetSignalStates(tile);
b &= a;
/* When signals are not present (in neither
* direction), we pretend them to be green. (So if
* signals are only one way, the other way will
* implicitely become `red' */
if ((a & 0xC) == 0) b |= 0xC;
if ((a & 0x3) == 0) b |= 0x3;
if ((b & 0x8) == 0) ret |= 0x10070000;
if ((b & 0x4) == 0) ret |= 0x07100000;
if ((b & 0x2) == 0) ret |= 0x20080000;
if ((b & 0x1) == 0) ret |= 0x08200000;
return ret;
}
case RAIL_TILE_DEPOT: return AxisToTrackBits(DiagDirToAxis(GetRailDepotDirection(tile))) * 0x101;
case RAIL_TILE_WAYPOINT: return GetRailWaypointBits(tile) * 0x101;
}
}
static void ClickTile_Track(TileIndex tile)
{
switch (GetRailTileType(tile)) {
case RAIL_TILE_DEPOT: ShowDepotWindow(tile, VEH_TRAIN); break;
case RAIL_TILE_WAYPOINT: ShowRenameWaypointWindow(GetWaypointByTile(tile)); break;
default: break;
}
}
static void GetTileDesc_Track(TileIndex tile, TileDesc *td)
{
td->owner = GetTileOwner(tile);
switch (GetRailTileType(tile)) {
case RAIL_TILE_NORMAL:
td->str = STR_1021_RAILROAD_TRACK;
break;
case RAIL_TILE_SIGNALS: {
const StringID signal_type[4][4] = {
{
STR_RAILROAD_TRACK_WITH_NORMAL_SIGNALS,
STR_RAILROAD_TRACK_WITH_NORMAL_PRESIGNALS,
STR_RAILROAD_TRACK_WITH_NORMAL_EXITSIGNALS,
STR_RAILROAD_TRACK_WITH_NORMAL_COMBOSIGNALS
},
{
STR_RAILROAD_TRACK_WITH_NORMAL_PRESIGNALS,
STR_RAILROAD_TRACK_WITH_PRESIGNALS,
STR_RAILROAD_TRACK_WITH_PRE_EXITSIGNALS,
STR_RAILROAD_TRACK_WITH_PRE_COMBOSIGNALS
},
{
STR_RAILROAD_TRACK_WITH_NORMAL_EXITSIGNALS,
STR_RAILROAD_TRACK_WITH_PRE_EXITSIGNALS,
STR_RAILROAD_TRACK_WITH_EXITSIGNALS,
STR_RAILROAD_TRACK_WITH_EXIT_COMBOSIGNALS
},
{
STR_RAILROAD_TRACK_WITH_NORMAL_COMBOSIGNALS,
STR_RAILROAD_TRACK_WITH_PRE_COMBOSIGNALS,
STR_RAILROAD_TRACK_WITH_EXIT_COMBOSIGNALS,
STR_RAILROAD_TRACK_WITH_COMBOSIGNALS
}
};
td->str = signal_type[GetSignalType(tile, TRACK_UPPER)][GetSignalType(tile, TRACK_LOWER)];
break;
}
case RAIL_TILE_DEPOT:
td->str = STR_1023_RAILROAD_TRAIN_DEPOT;
break;
case RAIL_TILE_WAYPOINT:
default:
td->str = STR_LANDINFO_WAYPOINT;
break;
}
}
static void ChangeTileOwner_Track(TileIndex tile, PlayerID old_player, PlayerID new_player)
{
if (!IsTileOwner(tile, old_player)) return;
if (new_player != PLAYER_SPECTATOR) {
SetTileOwner(tile, new_player);
} else {
DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
}
}
static const byte _fractcoords_behind[4] = { 0x8F, 0x8, 0x80, 0xF8 };
static const byte _fractcoords_enter[4] = { 0x8A, 0x48, 0x84, 0xA8 };
static const signed char _deltacoord_leaveoffset[8] = {
-1, 0, 1, 0, /* x */
0, 1, 0, -1 /* y */
};
static uint32 VehicleEnter_Track(Vehicle *v, TileIndex tile, int x, int y)
{
byte fract_coord;
byte fract_coord_leave;
DiagDirection dir;
int length;
/* this routine applies only to trains in depot tiles */
if (v->type != VEH_TRAIN || !IsTileDepotType(tile, TRANSPORT_RAIL)) return VETSB_CONTINUE;
/* depot direction */
dir = GetRailDepotDirection(tile);
/* calculate the point where the following wagon should be activated */
/* this depends on the length of the current vehicle */
length = v->u.rail.cached_veh_length;
fract_coord_leave =
((_fractcoords_enter[dir] & 0x0F) + // x
(length + 1) * _deltacoord_leaveoffset[dir]) +
(((_fractcoords_enter[dir] >> 4) + // y
((length + 1) * _deltacoord_leaveoffset[dir+4])) << 4);
fract_coord = (x & 0xF) + ((y & 0xF) << 4);
if (_fractcoords_behind[dir] == fract_coord) {
/* make sure a train is not entering the tile from behind */
return VETSB_CANNOT_ENTER;
} else if (_fractcoords_enter[dir] == fract_coord) {
if (DiagDirToDir(ReverseDiagDir(dir)) == v->direction) {
/* enter the depot */
v->u.rail.track = TRACK_BIT_DEPOT,
v->vehstatus |= VS_HIDDEN; /* hide it */
v->direction = ReverseDir(v->direction);
if (v->Next() == NULL) VehicleEnterDepot(v);
v->tile = tile;
InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
return 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->u.rail.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 (!_patches.build_on_slopes || !AutoslopeEnabled()) return CMD_ERROR;
/* Is the slope-rail_bits combination valid in general? I.e. is it save to call GetRailFoundation() ? */
if (CmdFailed(CheckRailSlope(tileh_new, rail_bits, TRACK_BIT_NONE, tile))) return CMD_ERROR;
/* 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: return (((z_old != z_new) || (tileh_old != tileh_new)) ? CMD_ERROR : _price.terraform);
}
/* The height of the track_corner must not be changed. The rest ensures GetRailFoundation() already. */
z_old += GetSlopeZInCorner((Slope)(tileh_old & ~SLOPE_HALFTILE_MASK), track_corner);
z_new += GetSlopeZInCorner((Slope)(tileh_new & ~SLOPE_HALFTILE_MASK), track_corner);
if (z_old != z_new) return CMD_ERROR;
CommandCost cost = CommandCost(_price.terraform);
/* Make the ground dirty, if surface slope has changed */
if (tileh_old != tileh_new) {
if (GetRailGroundType(tile) == RAIL_GROUND_WATER) cost.AddCost(_price.clear_water);
if ((flags & DC_EXEC) != 0) SetRailGroundType(tile, RAIL_GROUND_BARREN);
}
return cost;
}
static CommandCost TerraformTile_Track(TileIndex tile, uint32 flags, uint z_new, Slope tileh_new)
{
uint z_old;
Slope tileh_old = GetTileSlope(tile, &z_old);
if (IsPlainRailTile(tile)) {
TrackBits rail_bits = GetTrackBits(tile);
bool was_water = GetRailGroundType(tile) == RAIL_GROUND_WATER;
_error_message = STR_1008_MUST_REMOVE_RAILROAD_TRACK;
/* 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 (was_water ? CommandCost(_price.clear_water) : CommandCost());
} else {
if (_patches.build_on_slopes && AutoslopeEnabled()) {
switch (GetRailTileType(tile)) {
case RAIL_TILE_WAYPOINT: {
CommandCost cost = TestAutoslopeOnRailTile(tile, flags, z_old, tileh_old, z_new, tileh_new, GetRailWaypointBits(tile));
if (!CmdFailed(cost)) return cost; // allow autoslope
break;
}
case RAIL_TILE_DEPOT:
if (AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, GetRailDepotDirection(tile))) return _price.terraform;
break;
default: NOT_REACHED();
}
}
}
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 */
GetAcceptedCargo_Track, /* get_accepted_cargo_proc */
GetTileDesc_Track, /* get_tile_desc_proc */
GetTileTrackStatus_Track, /* get_tile_track_status_proc */
ClickTile_Track, /* click_tile_proc */
AnimateTile_Track, /* animate_tile_proc */
TileLoop_Track, /* tile_loop_clear */
ChangeTileOwner_Track, /* change_tile_owner_clear */
NULL, /* get_produced_cargo_proc */
VehicleEnter_Track, /* vehicle_enter_tile_proc */
GetFoundation_Track, /* get_foundation_proc */
TerraformTile_Track, /* terraform_tile_proc */
};