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OpenTTD-patches/rail_cmd.c
tron 473efb372e (svn r5396) - Remove two fixed parameters 
- Simplify an expresssion: c ? f(x) : f(y) -> f(c ? x : y)
2006-06-28 06:10:20 +00:00

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/* $Id$ */
#include "stdafx.h"
#include "openttd.h"
#include "bridge_map.h"
#include "debug.h"
#include "functions.h"
#include "rail_map.h"
#include "road_map.h"
#include "table/sprites.h"
#include "table/strings.h"
#include "map.h"
#include "tile.h"
#include "town_map.h"
#include "tunnel_map.h"
#include "vehicle.h"
#include "viewport.h"
#include "command.h"
#include "pathfind.h"
#include "engine.h"
#include "town.h"
#include "sound.h"
#include "station.h"
#include "sprite.h"
#include "depot.h"
#include "waypoint.h"
#include "rail.h"
#include "railtypes.h" // include table for railtypes
#include "newgrf.h"
#include "yapf/yapf.h"
#include "newgrf_callbacks.h"
#include "newgrf_station.h"
const byte _track_sloped_sprites[14] = {
14, 15, 22, 13,
0, 21, 17, 12,
23, 0, 18, 20,
19, 16
};
void ShowTrainDepotWindow(TileIndex tile);
/* 4
* ---------
* |\ /|
* | \ 1/ |
* | \ / |
* | \ / |
* 16| \ |32
* | / \2 |
* | / \ |
* | / \ |
* |/ \|
* ---------
* 8
*/
/* MAP2 byte: abcd???? => Signal On? Same coding as map3lo
* MAP3LO byte: abcd???? => Signal Exists?
* a and b are for diagonals, upper and left,
* one for each direction. (ie a == NE->SW, b ==
* SW->NE, or v.v., I don't know. b and c are
* similar for lower and right.
* MAP2 byte: ????abcd => Type of ground.
* MAP3LO byte: ????abcd => Type of rail.
* MAP5: 00abcdef => rail
* 01abcdef => rail w/ signals
* 10uuuuuu => unused
* 11uuuudd => rail depot
*/
static bool CheckTrackCombination(TileIndex tile, TrackBits to_build, uint flags)
{
RailTileType type = GetRailTileType(tile);
TrackBits current; /* The current track layout */
TrackBits future; /* The track layout we want to build */
_error_message = STR_1001_IMPOSSIBLE_TRACK_COMBINATION;
if (type != RAIL_TILE_NORMAL && type != RAIL_TILE_SIGNALS)
return false; /* Cannot build anything on depots and checkpoints */
/* 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) || type == RAIL_TILE_SIGNALS) {
/* If we are not allowed to overlap (flag is on for ai players or we have
* signals on the tile), check that */
return future == TRACK_BIT_HORZ || future == TRACK_BIT_VERT;
} else {
/* Normally, we may overlap and any combination is valid */
return true;
}
}
static const TrackBits _valid_tileh_slopes[][15] = {
// set of normal ones
{
TRACK_BIT_ALL,
TRACK_BIT_RIGHT,
TRACK_BIT_UPPER,
TRACK_BIT_X,
TRACK_BIT_LEFT,
0,
TRACK_BIT_Y,
TRACK_BIT_LOWER,
TRACK_BIT_LOWER,
TRACK_BIT_Y,
0,
TRACK_BIT_LEFT,
TRACK_BIT_X,
TRACK_BIT_UPPER,
TRACK_BIT_RIGHT,
},
// allowed rail for an evenly raised platform
{
0,
TRACK_BIT_LEFT,
TRACK_BIT_LOWER,
TRACK_BIT_Y | TRACK_BIT_LOWER | TRACK_BIT_LEFT,
TRACK_BIT_RIGHT,
TRACK_BIT_ALL,
TRACK_BIT_X | TRACK_BIT_LOWER | TRACK_BIT_RIGHT,
TRACK_BIT_ALL,
TRACK_BIT_UPPER,
TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_LEFT,
TRACK_BIT_ALL,
TRACK_BIT_ALL,
TRACK_BIT_Y | TRACK_BIT_UPPER | TRACK_BIT_RIGHT,
TRACK_BIT_ALL,
TRACK_BIT_ALL
}
};
uint GetRailFoundation(Slope tileh, TrackBits bits)
{
uint i;
if ((~_valid_tileh_slopes[0][tileh] & bits) == 0) return 0;
if ((~_valid_tileh_slopes[1][tileh] & bits) == 0) return tileh;
switch (bits) {
case TRACK_BIT_X: i = 0; break;
case TRACK_BIT_Y: i = 1; break;
default: return 0;
}
switch (tileh) {
case SLOPE_W: i += 0; break;
case SLOPE_S: i += 2; break;
case SLOPE_E: i += 4; break;
case SLOPE_N: i += 6; break;
default: return 0;
}
return i + 15;
}
static uint32 CheckRailSlope(Slope tileh, TrackBits rail_bits, TrackBits existing, TileIndex tile)
{
// never allow building on top of steep tiles
if (!IsSteepSlope(tileh)) {
rail_bits |= existing;
// don't allow building on the lower side of a coast
if (IsTileType(tile, MP_WATER) &&
~_valid_tileh_slopes[1][tileh] & rail_bits) {
return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER);
}
// no special foundation
if ((~_valid_tileh_slopes[0][tileh] & rail_bits) == 0)
return 0;
if ((~_valid_tileh_slopes[1][tileh] & rail_bits) == 0 || ( // whole tile is leveled up
(rail_bits == TRACK_BIT_X || rail_bits == TRACK_BIT_Y) &&
(tileh == SLOPE_W || tileh == SLOPE_S || tileh == SLOPE_E || tileh == SLOPE_N)
)) { // partly up
if (existing != 0) {
return 0;
} else if (!_patches.build_on_slopes || _is_old_ai_player) {
return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
} else {
return _price.terraform;
}
}
}
return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
}
/* Validate functions for rail building */
static inline bool ValParamTrackOrientation(Track track) {return IsValidTrack(track);}
/** Build a single piece of rail
* @param tile tile to build on
* @param p1 railtype of being built piece (normal, mono, maglev)
* @param p2 rail track to build
*/
int32 CmdBuildSingleRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
Slope tileh;
Track track = (Track)p2;
TrackBits trackbit;
int32 cost = 0;
int32 ret;
if (!ValParamRailtype(p1) || !ValParamTrackOrientation(track)) return CMD_ERROR;
tileh = GetTileSlope(tile, NULL);
trackbit = TrackToTrackBits(track);
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
switch (GetTileType(tile)) {
case MP_TUNNELBRIDGE:
if (!IsBridge(tile) ||
!IsBridgeMiddle(tile) ||
(GetBridgeAxis(tile) == AXIS_X ? TRACK_BIT_Y : TRACK_BIT_X) != trackbit) {
// Get detailed error message
return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
}
if (IsClearUnderBridge(tile)) {
ret = CheckRailSlope(tileh, trackbit, 0, tile);
if (CmdFailed(ret)) return ret;
cost += ret;
if (flags & DC_EXEC) SetRailUnderBridge(tile, _current_player, p1);
} else if (IsTransportUnderBridge(tile) &&
GetTransportTypeUnderBridge(tile) == TRANSPORT_RAIL) {
return_cmd_error(STR_1007_ALREADY_BUILT);
} else {
// Get detailed error message
return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
}
break;
case MP_RAILWAY:
if (!CheckTrackCombination(tile, trackbit, flags) ||
!EnsureNoVehicle(tile)) {
return CMD_ERROR;
}
if (GetRailTileType(tile) == RAIL_TILE_DEPOT_WAYPOINT ||
!IsTileOwner(tile, _current_player) ||
GetRailType(tile) != p1) {
// Get detailed error message
return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
}
ret = CheckRailSlope(tileh, trackbit, GetTrackBits(tile), tile);
if (CmdFailed(ret)) return ret;
cost += ret;
if (flags & DC_EXEC) {
SetRailGroundType(tile, RAIL_GROUND_BARREN);
_m[tile].m5 |= trackbit;
}
break;
case MP_STREET:
#define M(x) (1 << (x))
/* Level crossings may only be built on these slopes */
if (!HASBIT(M(SLOPE_SEN) | M(SLOPE_ENW) | M(SLOPE_NWS) | M(SLOPE_NS) | M(SLOPE_WSE) | M(SLOPE_EW) | M(SLOPE_FLAT), tileh)) {
return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
}
#undef M
if (!EnsureNoVehicle(tile)) return CMD_ERROR;
if (GetRoadTileType(tile) == ROAD_TILE_NORMAL) {
if (HasRoadWorks(tile)) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS);
if ((track == TRACK_X && GetRoadBits(tile) == ROAD_Y) ||
(track == TRACK_Y && GetRoadBits(tile) == ROAD_X)) {
if (flags & DC_EXEC) {
MakeRoadCrossing(tile, GetTileOwner(tile), _current_player, (track == TRACK_X ? AXIS_Y : AXIS_X), p1, GetTownIndex(tile));
}
}
break;
}
if (IsLevelCrossing(tile) && GetCrossingRailBits(tile) == trackbit) {
return_cmd_error(STR_1007_ALREADY_BUILT);
}
/* FALLTHROUGH */
default:
ret = CheckRailSlope(tileh, trackbit, 0, tile);
if (CmdFailed(ret)) return ret;
cost += ret;
ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
if (CmdFailed(ret)) return ret;
cost += ret;
if (flags & DC_EXEC) MakeRailNormal(tile, _current_player, trackbit, p1);
break;
}
if (flags & DC_EXEC) {
MarkTileDirtyByTile(tile);
SetSignalsOnBothDir(tile, track);
YapfNotifyTrackLayoutChange(tile, track);
}
return cost + _price.build_rail;
}
/** Remove a single piece of track
* @param tile tile to remove track from
* @param p1 unused
* @param p2 rail orientation
*/
int32 CmdRemoveSingleRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
Track track = (Track)p2;
TrackBits trackbit;
int32 cost = _price.remove_rail;
bool crossing = false;
if (!ValParamTrackOrientation(p2)) return CMD_ERROR;
trackbit = TrackToTrackBits(track);
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
switch (GetTileType(tile)) {
case MP_TUNNELBRIDGE:
if (!IsBridge(tile) ||
!IsBridgeMiddle(tile) ||
!IsTransportUnderBridge(tile) ||
GetTransportTypeUnderBridge(tile) != TRANSPORT_RAIL ||
GetRailBitsUnderBridge(tile) != trackbit ||
(_current_player != OWNER_WATER && !CheckTileOwnership(tile)) ||
!EnsureNoVehicleOnGround(tile)) {
return CMD_ERROR;
}
if (flags & DC_EXEC) SetClearUnderBridge(tile);
break;
case MP_STREET: {
if (!IsLevelCrossing(tile) ||
GetCrossingRailBits(tile) != trackbit ||
(_current_player != OWNER_WATER && !CheckTileOwnership(tile)) ||
!EnsureNoVehicle(tile)) {
return CMD_ERROR;
}
if (flags & DC_EXEC) {
MakeRoadNormal(tile, GetCrossingRoadOwner(tile), GetCrossingRoadBits(tile), GetTownIndex(tile));
}
break;
}
case MP_RAILWAY: {
TrackBits present;
if (!IsPlainRailTile(tile) ||
(_current_player != OWNER_WATER && !CheckTileOwnership(tile)) ||
!EnsureNoVehicle(tile)) {
return CMD_ERROR;
}
present = GetTrackBits(tile);
if ((present & trackbit) == 0) return CMD_ERROR;
if (present == (TRACK_BIT_X | TRACK_BIT_Y)) crossing = true;
/* Charge extra to remove signals on the track, if they are there */
if (HasSignalOnTrack(tile, track))
cost += DoCommand(tile, track, 0, flags, CMD_REMOVE_SIGNALS);
if (flags & DC_EXEC) {
present ^= trackbit;
if (present == 0) {
DoClearSquare(tile);
} else {
SetTrackBits(tile, present);
}
}
break;
}
default: return CMD_ERROR;
}
if (flags & DC_EXEC) {
MarkTileDirtyByTile(tile);
if (crossing) {
/* crossing is set when only TRACK_BIT_X and TRACK_BIT_Y are set. As we
* are removing one of these pieces, we'll need to update signals for
* both directions explicitly, as after the track is removed it won't
* 'connect' with the other piece. */
SetSignalsOnBothDir(tile, TRACK_X);
SetSignalsOnBothDir(tile, TRACK_Y);
YapfNotifyTrackLayoutChange(tile, TRACK_X);
YapfNotifyTrackLayoutChange(tile, TRACK_Y);
} else {
SetSignalsOnBothDir(tile, track);
YapfNotifyTrackLayoutChange(tile, track);
}
}
return cost;
}
static const TileIndexDiffC _trackdelta[] = {
{ -1, 0 }, { 0, 1 }, { -1, 0 }, { 0, 1 }, { 1, 0 }, { 0, 1 },
{ 0, 0 },
{ 0, 0 },
{ 1, 0 }, { 0, -1 }, { 0, -1 }, { 1, 0 }, { 0, -1 }, { -1, 0 },
{ 0, 0 },
{ 0, 0 }
};
static int32 ValidateAutoDrag(Trackdir *trackdir, TileIndex start, TileIndex end)
{
int x = TileX(start);
int y = TileY(start);
int ex = TileX(end);
int ey = TileY(end);
int dx, dy, trdx, trdy;
if (!ValParamTrackOrientation(*trackdir)) return CMD_ERROR;
// calculate delta x,y from start to end tile
dx = ex - x;
dy = ey - y;
// calculate delta x,y for the first direction
trdx = _trackdelta[*trackdir].x;
trdy = _trackdelta[*trackdir].y;
if (!IsDiagonalTrackdir(*trackdir)) {
trdx += _trackdelta[*trackdir ^ 1].x;
trdy += _trackdelta[*trackdir ^ 1].y;
}
// validate the direction
while (
(trdx <= 0 && dx > 0) ||
(trdx >= 0 && dx < 0) ||
(trdy <= 0 && dy > 0) ||
(trdy >= 0 && dy < 0)
) {
if (!HASBIT(*trackdir, 3)) { // first direction is invalid, try the other
SETBIT(*trackdir, 3); // reverse the direction
trdx = -trdx;
trdy = -trdy;
} else { // other direction is invalid too, invalid drag
return CMD_ERROR;
}
}
// (for diagonal tracks, this is already made sure of by above test), but:
// for non-diagonal tracks, check if the start and end tile are on 1 line
if (!IsDiagonalTrackdir(*trackdir)) {
trdx = _trackdelta[*trackdir].x;
trdy = _trackdelta[*trackdir].y;
if (abs(dx) != abs(dy) && abs(dx) + abs(trdy) != abs(dy) + abs(trdx))
return CMD_ERROR;
}
return 0;
}
/** Build a stretch of railroad tracks.
* @param tile start tile of drag
* @param p1 end tile of drag
* @param p2 various bitstuffed elements
* - p2 = (bit 0-3) - railroad type normal/maglev (0 = normal, 1 = mono, 2 = maglev)
* - p2 = (bit 4-6) - track-orientation, valid values: 0-5 (Track enum)
* - p2 = (bit 7) - 0 = build, 1 = remove tracks
*/
static int32 CmdRailTrackHelper(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
int32 ret, total_cost = 0;
Track track = (Track)GB(p2, 4, 3);
Trackdir trackdir;
byte mode = HASBIT(p2, 7);
RailType railtype = (RailType)GB(p2, 0, 4);
TileIndex end_tile;
if (!ValParamRailtype(railtype) || !ValParamTrackOrientation(track)) return CMD_ERROR;
if (p1 >= MapSize()) return CMD_ERROR;
end_tile = p1;
trackdir = TrackToTrackdir(track);
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
if (CmdFailed(ValidateAutoDrag(&trackdir, tile, end_tile))) return CMD_ERROR;
if (flags & DC_EXEC) SndPlayTileFx(SND_20_SPLAT_2, tile);
for (;;) {
ret = DoCommand(tile, railtype, TrackdirToTrack(trackdir), flags, (mode == 0) ? CMD_BUILD_SINGLE_RAIL : CMD_REMOVE_SINGLE_RAIL);
if (CmdFailed(ret)) {
if ((_error_message != STR_1007_ALREADY_BUILT) && (mode == 0)) break;
_error_message = INVALID_STRING_ID;
} else {
total_cost += ret;
}
if (tile == end_tile) break;
tile += ToTileIndexDiff(_trackdelta[trackdir]);
// toggle railbit for the non-diagonal tracks
if (!IsDiagonalTrackdir(trackdir)) trackdir ^= 1;
}
return (total_cost == 0) ? CMD_ERROR : total_cost;
}
/** Build rail on a stretch of track.
* Stub for the unified rail builder/remover
* @see CmdRailTrackHelper
*/
int32 CmdBuildRailroadTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
return CmdRailTrackHelper(tile, flags, p1, CLRBIT(p2, 7));
}
/** Build rail on a stretch of track.
* Stub for the unified rail builder/remover
* @see CmdRailTrackHelper
*/
int32 CmdRemoveRailroadTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
return CmdRailTrackHelper(tile, flags, p1, SETBIT(p2, 7));
}
/** Build a train depot
* @param tile position of the train depot
* @param p1 rail type
* @param p2 entrance direction (DiagDirection)
*
* @todo When checking for the tile slope,
* distingush between "Flat land required" and "land sloped in wrong direction"
*/
int32 CmdBuildTrainDepot(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
Depot *d;
int32 cost, ret;
Slope tileh;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
if (!EnsureNoVehicle(tile)) return CMD_ERROR;
/* check railtype and valid direction for depot (0 through 3), 4 in total */
if (!ValParamRailtype(p1) || p2 > 3) return CMD_ERROR;
tileh = GetTileSlope(tile, NULL);
/* Prohibit construction if
The tile is non-flat AND
1) The AI is "old-school"
2) build-on-slopes is disabled
3) the tile is steep i.e. spans two height levels
4) the exit points in the wrong direction
*/
if (tileh != SLOPE_FLAT && (
_is_old_ai_player ||
!_patches.build_on_slopes ||
IsSteepSlope(tileh) ||
!CanBuildDepotByTileh(p2, tileh)
)) {
return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
}
ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
if (CmdFailed(ret)) return CMD_ERROR;
cost = ret;
d = AllocateDepot();
if (d == NULL) return CMD_ERROR;
if (flags & DC_EXEC) {
MakeRailDepot(tile, _current_player, p2, p1);
MarkTileDirtyByTile(tile);
d->xy = tile;
d->town_index = ClosestTownFromTile(tile, (uint)-1)->index;
UpdateSignalsOnSegment(tile, p2);
YapfNotifyTrackLayoutChange(tile, TrackdirToTrack(DiagdirToDiagTrackdir(p2)));
}
return cost + _price.build_train_depot;
}
/** Build signals, alternate between double/single, signal/semaphore,
* pre/exit/combo-signals, and what-else not
* @param tile tile where to build the signals
* @param p1 various bitstuffed elements
* - p1 = (bit 0-2) - track-orientation, valid values: 0-5 (Track enum)
* - p1 = (bit 3) - choose semaphores/signals or cycle normal/pre/exit/combo depending on context
* @param p2 used for CmdBuildManySignals() to copy direction of first signal
* TODO: p2 should be replaced by two bits for "along" and "against" the track.
*/
int32 CmdBuildSingleSignal(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
SignalVariant sigvar;
bool pre_signal;
Track track = (Track)(p1 & 0x7);
int32 cost;
// Same bit, used in different contexts
sigvar = HASBIT(p1, 3) ? SIG_SEMAPHORE : SIG_ELECTRIC;
pre_signal = HASBIT(p1, 3);
if (!ValParamTrackOrientation(track) || !IsTileType(tile, MP_RAILWAY) || !EnsureNoVehicle(tile))
return CMD_ERROR;
/* Protect against invalid signal copying */
if (p2 != 0 && (p2 & SignalOnTrack(track)) == 0) return CMD_ERROR;
/* You can only build signals on plain rail tiles, and the selected track must exist */
if (!IsPlainRailTile(tile) || !HasTrack(tile, track)) return CMD_ERROR;
if (!CheckTileOwnership(tile)) return CMD_ERROR;
_error_message = STR_1005_NO_SUITABLE_RAILROAD_TRACK;
{
/* See if this is a valid track combination for signals, (ie, no overlap) */
TrackBits trackbits = GetTrackBits(tile);
if (KILL_FIRST_BIT(trackbits) != 0 && /* More than one track present */
trackbits != TRACK_BIT_HORZ &&
trackbits != TRACK_BIT_VERT) {
return CMD_ERROR;
}
}
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
if (!HasSignalOnTrack(tile, track)) {
// build new signals
cost = _price.build_signals;
} else {
if (p2 != 0 && sigvar != GetSignalVariant(tile)) {
// convert signals <-> semaphores
cost = _price.build_signals + _price.remove_signals;
} else {
// it is free to change orientation/pre-exit-combo signals
cost = 0;
}
}
if (flags & DC_EXEC) {
if (GetRailTileType(tile) != RAIL_TILE_SIGNALS) {
// there are no signals at all on this tile yet
_m[tile].m5 |= RAIL_TILE_SIGNALS; // change into signals
_m[tile].m2 |= 0xF0; // all signals are on
_m[tile].m3 &= ~0xF0; // no signals built by default
SetSignalType(tile, SIGTYPE_NORMAL);
SetSignalVariant(tile, sigvar);
}
if (p2 == 0) {
if (!HasSignalOnTrack(tile, track)) {
// build new signals
_m[tile].m3 |= SignalOnTrack(track);
} else {
if (pre_signal) {
// cycle between normal -> pre -> exit -> combo -> ...
SignalType type = GetSignalType(tile);
SetSignalType(tile, type == SIGTYPE_COMBO ? SIGTYPE_NORMAL : type + 1);
} else {
CycleSignalSide(tile, track);
}
}
} else {
/* If CmdBuildManySignals is called with copying signals, just copy the
* direction of the first signal given as parameter by CmdBuildManySignals */
_m[tile].m3 &= ~SignalOnTrack(track);
_m[tile].m3 |= p2 & SignalOnTrack(track);
SetSignalVariant(tile, sigvar);
}
MarkTileDirtyByTile(tile);
SetSignalsOnBothDir(tile, track);
YapfNotifyTrackLayoutChange(tile, track);
}
return cost;
}
/** Build many signals by dragging; AutoSignals
* @param tile start tile of drag
* @param p1 end tile of drag
* @param p2 various bitstuffed elements
* - p2 = (bit 0) - 0 = build, 1 = remove signals
* - p2 = (bit 3) - 0 = signals, 1 = semaphores
* - p2 = (bit 4- 6) - track-orientation, valid values: 0-5 (Track enum)
* - p2 = (bit 24-31) - user defined signals_density
*/
static int32 CmdSignalTrackHelper(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
int32 ret, total_cost, signal_ctr;
byte signals;
bool error = true;
TileIndex end_tile;
int mode = p2 & 0x1;
Track track = GB(p2, 4, 3);
Trackdir trackdir = TrackToTrackdir(track);
byte semaphores = (HASBIT(p2, 3) ? 8 : 0);
byte signal_density = (p2 >> 24);
if (p1 >= MapSize()) return CMD_ERROR;
end_tile = p1;
if (signal_density == 0 || signal_density > 20) return CMD_ERROR;
if (!IsTileType(tile, MP_RAILWAY)) return CMD_ERROR;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
/* for vertical/horizontal tracks, double the given signals density
* since the original amount will be too dense (shorter tracks) */
if (!IsDiagonalTrack(track)) signal_density *= 2;
if (CmdFailed(ValidateAutoDrag(&trackdir, tile, end_tile))) return CMD_ERROR;
track = TrackdirToTrack(trackdir); /* trackdir might have changed, keep track in sync */
// copy the signal-style of the first rail-piece if existing
if (GetRailTileType(tile) == RAIL_TILE_SIGNALS && GetTrackBits(tile) != 0) { /* XXX: GetTrackBits check useless? */
signals = _m[tile].m3 & SignalOnTrack(track);
if (signals == 0) signals = SignalOnTrack(track); /* Can this actually occur? */
// copy signal/semaphores style (independent of CTRL)
semaphores = (GetSignalVariant(tile) == SIG_ELECTRIC ? 0 : 8);
} else { // no signals exist, drag a two-way signal stretch
signals = SignalOnTrack(track);
}
/* signal_ctr - amount of tiles already processed
* signals_density - patch setting to put signal on every Nth tile (double space on |, -- tracks)
**********
* trackdir - trackdir to build with autorail
* semaphores - semaphores or signals
* signals - is there a signal/semaphore on the first tile, copy its style (two-way/single-way)
and convert all others to semaphore/signal
* mode - 1 remove signals, 0 build signals */
signal_ctr = total_cost = 0;
for (;;) {
// only build/remove signals with the specified density
if (signal_ctr % signal_density == 0) {
ret = DoCommand(tile, TrackdirToTrack(trackdir) | semaphores, signals, flags, (mode == 1) ? CMD_REMOVE_SIGNALS : CMD_BUILD_SIGNALS);
/* Abort placement for any other error than NOT_SUITABLE_TRACK
* This includes vehicles on track, competitor's tracks, etc. */
if (CmdFailed(ret)) {
if (_error_message != STR_1005_NO_SUITABLE_RAILROAD_TRACK && mode != 1) return CMD_ERROR;
_error_message = INVALID_STRING_ID;
} else {
error = false;
total_cost += ret;
}
}
if (tile == end_tile) break;
tile += ToTileIndexDiff(_trackdelta[trackdir]);
signal_ctr++;
// toggle railbit for the non-diagonal tracks (|, -- tracks)
if (!IsDiagonalTrackdir(trackdir)) trackdir ^= 1;
}
return error ? CMD_ERROR : total_cost;
}
/** Build signals on a stretch of track.
* Stub for the unified signal builder/remover
* @see CmdSignalTrackHelper
*/
int32 CmdBuildSignalTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
return CmdSignalTrackHelper(tile, flags, p1, p2);
}
/** Remove signals
* @param tile coordinates where signal is being deleted from
* @param p1 track to remove signal from (Track enum)
*/
int32 CmdRemoveSingleSignal(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
Track track = (Track)(p1 & 0x7);
if (!ValParamTrackOrientation(track) ||
!IsTileType(tile, MP_RAILWAY) ||
!EnsureNoVehicle(tile) ||
!HasSignalOnTrack(tile, track)) {
return CMD_ERROR;
}
/* Only water can remove signals from anyone */
if (_current_player != OWNER_WATER && !CheckTileOwnership(tile)) return CMD_ERROR;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
/* Do it? */
if (flags & DC_EXEC) {
_m[tile].m3 &= ~SignalOnTrack(track);
/* removed last signal from tile? */
if (GB(_m[tile].m3, 4, 4) == 0) {
SB(_m[tile].m2, 4, 4, 0);
SB(_m[tile].m5, 6, 2, RAIL_TILE_NORMAL >> 6); // XXX >> because the constant is meant for direct application, not use with SB
SetSignalVariant(tile, SIG_ELECTRIC); // remove any possible semaphores
}
SetSignalsOnBothDir(tile, track);
YapfNotifyTrackLayoutChange(tile, track);
MarkTileDirtyByTile(tile);
}
return _price.remove_signals;
}
/** Remove signals on a stretch of track.
* Stub for the unified signal builder/remover
* @see CmdSignalTrackHelper
*/
int32 CmdRemoveSignalTrack(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
return CmdSignalTrackHelper(tile, flags, p1, SETBIT(p2, 0));
}
typedef int32 DoConvertRailProc(TileIndex tile, RailType totype, bool exec);
static int32 DoConvertRail(TileIndex tile, RailType totype, bool exec)
{
if (!CheckTileOwnership(tile)) return CMD_ERROR;
if (!EnsureNoVehicle(tile) && (!IsCompatibleRail(GetRailType(tile), totype) || IsPlainRailTile(tile))) return CMD_ERROR;
// tile is already of requested type?
if (GetRailType(tile) == totype) return CMD_ERROR;
// change type.
if (exec) {
TrackBits tracks;
SetRailType(tile, totype);
MarkTileDirtyByTile(tile);
// notify YAPF about the track layout change
for (tracks = GetTrackBits(tile); tracks != TRACK_BIT_NONE; tracks = KILL_FIRST_BIT(tracks))
YapfNotifyTrackLayoutChange(tile, FIND_FIRST_BIT(tracks));
/* Update build vehicle window related to this depot */
if (IsTileDepotType(tile, TRANSPORT_RAIL)) {
Window *w = FindWindowById(WC_BUILD_VEHICLE, tile);
if (w != NULL) {
WP(w,buildtrain_d).railtype = totype;
SetWindowDirty(w);
}
}
}
return _price.build_rail / 2;
}
extern int32 DoConvertStationRail(TileIndex tile, RailType totype, bool exec);
extern int32 DoConvertStreetRail(TileIndex tile, RailType totype, bool exec);
extern int32 DoConvertTunnelBridgeRail(TileIndex tile, RailType totype, bool exec);
/** Convert one rail type to the other. You can convert normal rail to
* monorail/maglev easily or vice-versa.
* @param tile end tile of rail conversion drag
* @param p1 start tile of drag
* @param p2 new railtype to convert to
*/
int32 CmdConvertRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
int32 ret, cost, money;
int ex;
int ey;
int sx, sy, x, y;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
if (!ValParamRailtype(p2)) return CMD_ERROR;
if (p1 >= MapSize()) return CMD_ERROR;
// make sure sx,sy are smaller than ex,ey
ex = TileX(tile);
ey = TileY(tile);
sx = TileX(p1);
sy = TileY(p1);
if (ex < sx) intswap(ex, sx);
if (ey < sy) intswap(ey, sy);
money = GetAvailableMoneyForCommand();
cost = 0;
ret = 0;
for (x = sx; x <= ex; ++x) {
for (y = sy; y <= ey; ++y) {
TileIndex tile = TileXY(x, y);
DoConvertRailProc* proc;
switch (GetTileType(tile)) {
case MP_RAILWAY: proc = DoConvertRail; break;
case MP_STATION: proc = DoConvertStationRail; break;
case MP_STREET: proc = DoConvertStreetRail; break;
case MP_TUNNELBRIDGE: proc = DoConvertTunnelBridgeRail; break;
default: continue;
}
ret = proc(tile, p2, false);
if (CmdFailed(ret)) continue;
cost += ret;
if (flags & DC_EXEC) {
money -= ret;
if (money < 0) {
_additional_cash_required = ret;
return cost - ret;
}
proc(tile, p2, true);
}
}
}
return (cost == 0) ? ret : cost;
}
static int32 RemoveTrainDepot(TileIndex tile, uint32 flags)
{
if (!CheckTileOwnership(tile) && _current_player != OWNER_WATER)
return CMD_ERROR;
if (!EnsureNoVehicle(tile))
return CMD_ERROR;
if (flags & DC_EXEC) {
DiagDirection dir = GetRailDepotDirection(tile);
DoDeleteDepot(tile);
UpdateSignalsOnSegment(tile, dir);
YapfNotifyTrackLayoutChange(tile, TrackdirToTrack(DiagdirToDiagTrackdir(dir)));
}
return _price.remove_train_depot;
}
static int32 ClearTile_Track(TileIndex tile, byte flags)
{
int32 cost;
int32 ret;
byte m5;
m5 = _m[tile].m5;
if (flags & DC_AUTO) {
if (GetRailTileType(tile) == RAIL_TILE_DEPOT_WAYPOINT) {
return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED);
}
if (!IsTileOwner(tile, _current_player))
return_cmd_error(STR_1024_AREA_IS_OWNED_BY_ANOTHER);
return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);
}
cost = 0;
switch (GetRailTileType(tile)) {
/* XXX: Why the fuck do we remove these thow signals first? */
case RAIL_TILE_SIGNALS:
if (HasSignalOnTrack(tile, TRACK_X)) {
ret = DoCommand(tile, TRACK_X, 0, flags, CMD_REMOVE_SIGNALS);
if (CmdFailed(ret)) return CMD_ERROR;
cost += ret;
}
if (HasSignalOnTrack(tile, TRACK_LOWER)) {
ret = DoCommand(tile, TRACK_LOWER, 0, flags, CMD_REMOVE_SIGNALS);
if (CmdFailed(ret)) return CMD_ERROR;
cost += ret;
}
m5 &= TRACK_BIT_MASK;
if (!(flags & DC_EXEC)) {
for (; m5 != 0; m5 >>= 1) if (m5 & 1) cost += _price.remove_rail;
return cost;
}
/* FALLTHROUGH */
case RAIL_TILE_NORMAL: {
uint i;
for (i = 0; m5 != 0; i++, m5 >>= 1) {
if (m5 & 1) {
ret = DoCommand(tile, 0, i, flags, CMD_REMOVE_SINGLE_RAIL);
if (CmdFailed(ret)) return CMD_ERROR;
cost += ret;
}
}
return cost;
}
case RAIL_TILE_DEPOT_WAYPOINT:
if (GetRailTileSubtype(tile) == RAIL_SUBTYPE_DEPOT) {
return RemoveTrainDepot(tile, flags);
} else {
return RemoveTrainWaypoint(tile, flags, false);
}
default:
return CMD_ERROR;
}
}
#include "table/track_land.h"
static void DrawSingleSignal(TileIndex tile, byte condition, uint image, uint pos)
{
bool side = _opt.road_side & _patches.signal_side;
static const Point SignalPositions[2][12] = {
{ /* Signals on the left side */
/* LEFT LEFT RIGHT RIGHT UPPER UPPER */
{ 8, 5}, {14, 1}, { 1, 14}, { 9, 11}, { 1, 0}, { 3, 10},
/* LOWER LOWER X X Y Y */
{11, 4}, {14, 14}, {11, 3}, { 4, 13}, { 3, 4}, {11, 13}
}, { /* Signals on the right side */
/* LEFT LEFT RIGHT RIGHT UPPER UPPER */
{14, 1}, {12, 10}, { 4, 6}, { 1, 14}, {10, 4}, { 0, 1},
/* LOWER LOWER X X Y Y */
{14, 14}, { 5, 12}, {11, 13}, { 4, 3}, {13, 4}, { 3, 11}
}
};
static const SpriteID SignalBase[2][2][4] = {
{ /* Signals on left side */
{ 0x4FB, 0x1323, 0x1333, 0x1343}, /* light signals */
{ 0x1353, 0x1363, 0x1373, 0x1383} /* semaphores */
}, { /* Signals on right side */
{ 0x4FB, 0x1323, 0x1333, 0x1343}, /* light signals */
{ 0x1446, 0x1456, 0x1466, 0x1476} /* semaphores */
/* | | | | */
/* normal, entry, exit, combo */
}
};
uint x = TileX(tile) * TILE_SIZE + SignalPositions[side][pos].x;
uint y = TileY(tile) * TILE_SIZE + SignalPositions[side][pos].y;
SpriteID sprite;
/* _signal_base is set by our NewGRF Action 5 loader. If it is 0 then we
* just draw the standard signals, else we get the offset from _signal_base
* and draw that sprite. All the signal sprites are loaded sequentially. */
if (_signal_base == 0 || (GetSignalType(tile) == 0 && GetSignalVariant(tile) == SIG_ELECTRIC)) {
sprite = SignalBase[side][GetSignalVariant(tile)][GetSignalType(tile)] + image + condition;
} else {
sprite = _signal_base + (GetSignalType(tile) - 1) * 16 + GetSignalVariant(tile) * 64 + image + condition;
}
AddSortableSpriteToDraw(sprite, x, y, 1, 1, 10, GetSlopeZ(x,y));
}
static uint32 _drawtile_track_palette;
static void DrawTrackFence_NW(const TileInfo *ti)
{
uint32 image = 0x515;
if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? 0x519 : 0x51B;
AddSortableSpriteToDraw(image | _drawtile_track_palette,
ti->x, ti->y + 1, 16, 1, 4, ti->z);
}
static void DrawTrackFence_SE(const TileInfo *ti)
{
uint32 image = 0x515;
if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? 0x519 : 0x51B;
AddSortableSpriteToDraw(image | _drawtile_track_palette,
ti->x, ti->y + TILE_SIZE - 1, 16, 1, 4, ti->z);
}
static void DrawTrackFence_NW_SE(const TileInfo *ti)
{
DrawTrackFence_NW(ti);
DrawTrackFence_SE(ti);
}
static void DrawTrackFence_NE(const TileInfo *ti)
{
uint32 image = 0x516;
if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? 0x51A : 0x51C;
AddSortableSpriteToDraw(image | _drawtile_track_palette,
ti->x + 1, ti->y, 1, 16, 4, ti->z);
}
static void DrawTrackFence_SW(const TileInfo *ti)
{
uint32 image = 0x516;
if (ti->tileh != SLOPE_FLAT) image = (ti->tileh & SLOPE_S) ? 0x51A : 0x51C;
AddSortableSpriteToDraw(image | _drawtile_track_palette,
ti->x + TILE_SIZE - 1, ti->y, 1, 16, 4, ti->z);
}
static void DrawTrackFence_NE_SW(const TileInfo *ti)
{
DrawTrackFence_NE(ti);
DrawTrackFence_SW(ti);
}
static void DrawTrackFence_NS_1(const TileInfo *ti)
{
int z = ti->z;
if (ti->tileh & SLOPE_W) z += TILE_HEIGHT;
AddSortableSpriteToDraw(0x517 | _drawtile_track_palette,
ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
}
static void DrawTrackFence_NS_2(const TileInfo *ti)
{
int z = ti->z;
if (ti->tileh & SLOPE_E) z += TILE_HEIGHT;
AddSortableSpriteToDraw(0x517 | _drawtile_track_palette,
ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
}
static void DrawTrackFence_WE_1(const TileInfo *ti)
{
int z = ti->z;
if (ti->tileh & SLOPE_N) z += TILE_HEIGHT;
AddSortableSpriteToDraw(0x518 | _drawtile_track_palette,
ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
}
static void DrawTrackFence_WE_2(const TileInfo *ti)
{
int z = ti->z;
if (ti->tileh & SLOPE_S) z += TILE_HEIGHT;
AddSortableSpriteToDraw(0x518 | _drawtile_track_palette,
ti->x + TILE_SIZE / 2, ti->y + TILE_SIZE / 2, 1, 1, 4, z);
}
static void DrawTrackDetails(const TileInfo* ti)
{
switch (GetRailGroundType(ti->tile)) {
case RAIL_GROUND_FENCE_NW: DrawTrackFence_NW(ti); break;
case RAIL_GROUND_FENCE_SE: DrawTrackFence_SE(ti); break;
case RAIL_GROUND_FENCE_SENW: DrawTrackFence_NW_SE(ti); break;
case RAIL_GROUND_FENCE_NE: DrawTrackFence_NE(ti); break;
case RAIL_GROUND_FENCE_SW: DrawTrackFence_SW(ti); break;
case RAIL_GROUND_FENCE_NESW: DrawTrackFence_NE_SW(ti); break;
case RAIL_GROUND_FENCE_VERT1: DrawTrackFence_NS_1(ti); break;
case RAIL_GROUND_FENCE_VERT2: DrawTrackFence_NS_2(ti); break;
case RAIL_GROUND_FENCE_HORIZ1: DrawTrackFence_WE_1(ti); break;
case RAIL_GROUND_FENCE_HORIZ2: DrawTrackFence_WE_2(ti); break;
default: break;
}
}
static void DrawSpecialBuilding(
uint32 image, uint32 offset,
const TileInfo* ti,
byte x, byte y, byte z,
byte xsize, byte ysize, byte zsize)
{
if (image & PALETTE_MODIFIER_COLOR) image |= _drawtile_track_palette;
image += offset;
if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);
AddSortableSpriteToDraw(image, ti->x + x, ti->y + y, xsize, ysize, zsize, ti->z + z);
}
/**
* Draw ground sprite and track bits
* @param ti TileInfo
* @param track TrackBits to draw
* @param earth Draw as earth
* @param snow Draw as snow
* @param flat Always draw foundation
*/
static void DrawTrackBits(TileInfo* ti, TrackBits track)
{
const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
PalSpriteID image;
bool junction = false;
bool earth = IsBarrenRailGround(ti->tile);
bool snow = IsSnowRailGround(ti->tile);
// Select the sprite to use.
(image = rti->base_sprites.track_y, track == TRACK_BIT_Y) ||
(image++, track == TRACK_BIT_X) ||
(image++, track == TRACK_BIT_UPPER) ||
(image++, track == TRACK_BIT_LOWER) ||
(image++, track == TRACK_BIT_RIGHT) ||
(image++, track == TRACK_BIT_LEFT) ||
(image++, track == TRACK_BIT_CROSS) ||
(image = rti->base_sprites.track_ns, track == TRACK_BIT_HORZ) ||
(image++, track == TRACK_BIT_VERT) ||
(junction = true, false) ||
(image = rti->base_sprites.ground, (track & TRACK_BIT_3WAY_NE) == 0) ||
(image++, (track & TRACK_BIT_3WAY_SW) == 0) ||
(image++, (track & TRACK_BIT_3WAY_NW) == 0) ||
(image++, (track & TRACK_BIT_3WAY_SE) == 0) ||
(image++, true);
if (ti->tileh != SLOPE_FLAT) {
uint foundation = GetRailFoundation(ti->tileh, track);
if (foundation != 0) DrawFoundation(ti, foundation);
// DrawFoundation() modifies ti.
// Default sloped sprites..
if (ti->tileh != SLOPE_FLAT)
image = _track_sloped_sprites[ti->tileh - 1] + rti->base_sprites.track_y;
}
if (earth) {
image = (image & SPRITE_MASK) | PALETTE_TO_BARE_LAND; // Use brown palette
} else if (snow) {
image += rti->snow_offset;
}
DrawGroundSprite(image);
// Draw track pieces individually for junction tiles
if (junction) {
if (track & TRACK_BIT_X) DrawGroundSprite(rti->base_sprites.single_y);
if (track & TRACK_BIT_Y) DrawGroundSprite(rti->base_sprites.single_x);
if (track & TRACK_BIT_UPPER) DrawGroundSprite(rti->base_sprites.single_n);
if (track & TRACK_BIT_LOWER) DrawGroundSprite(rti->base_sprites.single_s);
if (track & TRACK_BIT_LEFT) DrawGroundSprite(rti->base_sprites.single_w);
if (track & TRACK_BIT_RIGHT) DrawGroundSprite(rti->base_sprites.single_e);
}
if (GetRailType(ti->tile) == RAILTYPE_ELECTRIC) DrawCatenary(ti);
}
static void DrawSignals(TileIndex tile, TrackBits rails)
{
#define MAYBE_DRAW_SIGNAL(x,y,z) if (IsSignalPresent(tile, x)) DrawSingleSignal(tile, GetSingleSignalState(tile, x), y - 0x4FB, z)
if (!(rails & TRACK_BIT_Y)) {
if (!(rails & TRACK_BIT_X)) {
if (rails & TRACK_BIT_LEFT) {
MAYBE_DRAW_SIGNAL(2, 0x509, 0);
MAYBE_DRAW_SIGNAL(3, 0x507, 1);
}
if (rails & TRACK_BIT_RIGHT) {
MAYBE_DRAW_SIGNAL(0, 0x509, 2);
MAYBE_DRAW_SIGNAL(1, 0x507, 3);
}
if (rails & TRACK_BIT_UPPER) {
MAYBE_DRAW_SIGNAL(3, 0x505, 4);
MAYBE_DRAW_SIGNAL(2, 0x503, 5);
}
if (rails & TRACK_BIT_LOWER) {
MAYBE_DRAW_SIGNAL(1, 0x505, 6);
MAYBE_DRAW_SIGNAL(0, 0x503, 7);
}
} else {
MAYBE_DRAW_SIGNAL(3, 0x4FB, 8);
MAYBE_DRAW_SIGNAL(2, 0x4FD, 9);
}
} else {
MAYBE_DRAW_SIGNAL(3, 0x4FF, 10);
MAYBE_DRAW_SIGNAL(2, 0x501, 11);
}
}
static void DrawTile_Track(TileInfo *ti)
{
const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
PalSpriteID image;
_drawtile_track_palette = SPRITE_PALETTE(PLAYER_SPRITE_COLOR(GetTileOwner(ti->tile)));
if (GetRailTileType(ti->tile) != RAIL_TILE_DEPOT_WAYPOINT) {
TrackBits rails = GetTrackBits(ti->tile);
DrawTrackBits(ti, rails);
if (_display_opt & DO_FULL_DETAIL) DrawTrackDetails(ti);
/* draw signals also? */
if (GetRailTileType(ti->tile) == RAIL_TILE_SIGNALS) DrawSignals(ti->tile, rails);
} else {
/* draw depots / waypoints */
const DrawTrackSeqStruct *drss;
bool is_depot = GetRailTileSubtype(ti->tile) == RAIL_SUBTYPE_DEPOT;
if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, ti->tileh);
if (IsRailWaypoint(ti->tile)) {
// look for customization
byte stat_id = GetWaypointByTile(ti->tile)->stat_id;
const StationSpec *statspec = GetCustomStationSpec(STAT_CLASS_WAYP, stat_id);
if (statspec != NULL) {
DrawTileSeqStruct const *seq;
// emulate station tile - open with building
uint tile = 2;
const DrawTileSprites *cust;
Station *st = ComposeWaypointStation(ti->tile);
uint32 relocation = GetCustomStationRelocation(statspec, st, ti->tile);
if (HASBIT(statspec->callbackmask, CBM_CUSTOM_LAYOUT)) {
uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
if (callback != CALLBACK_FAILED) tile = callback;
}
if (statspec->renderdata == NULL) {
cust = GetStationTileLayout(tile);
} else {
cust = &statspec->renderdata[(tile < statspec->tiles ? tile : 0) + GetWaypointAxis(ti->tile)];
}
/* If there is no sprite layout, we fall back to the default waypoint graphics. */
if (cust != NULL && cust->seq != NULL) {
image = cust->ground_sprite;
if (HASBIT(image, 31)) {
CLRBIT(image, 31);
image += GetCustomStationGroundRelocation(statspec, st, ti->tile);
image += rti->custom_ground_offset;
} else {
image += rti->total_offset;
}
DrawGroundSprite(image);
if (GetRailType(ti->tile) == RAILTYPE_ELECTRIC) DrawCatenary(ti);
foreach_draw_tile_seq(seq, cust->seq) {
DrawSpecialBuilding(
seq->image + relocation, 0, ti,
seq->delta_x, seq->delta_y, seq->delta_z,
seq->width, seq->height, seq->unk
);
}
return;
}
}
}
drss = is_depot ? _track_depot_layout_table[GetRailDepotDirection(ti->tile)] : _track_waypoint_layout_table[GetWaypointAxis(ti->tile)];
image = drss++->image;
/* @note This is kind of an ugly hack, as the PALETTE_MODIFIER_COLOR indicates
* whether the sprite is railtype dependent. Rewrite this asap */
if (image & PALETTE_MODIFIER_COLOR) image = (image & SPRITE_MASK) + rti->total_offset;
// adjust ground tile for desert
// (don't adjust for arctic depots, because snow in depots looks weird)
// type >= 4 means waypoints
if (IsSnowRailGround(ti->tile) && (_opt.landscape == LT_DESERT || !is_depot)) {
if (image != SPR_FLAT_GRASS_TILE) {
image += rti->snow_offset; // tile with tracks
} else {
image = SPR_FLAT_SNOWY_TILE; // flat ground
}
}
DrawGroundSprite(image);
if (GetRailType(ti->tile) == RAILTYPE_ELECTRIC) DrawCatenary(ti);
for (; drss->image != 0; drss++) {
DrawSpecialBuilding(
drss->image, is_depot ? rti->total_offset : 0, ti,
drss->subcoord_x, drss->subcoord_y, 0,
drss->width, drss->height, 0x17
);
}
}
}
void DrawTrainDepotSprite(int x, int y, int image, RailType railtype)
{
uint32 ormod, img;
const RailtypeInfo *rti = GetRailTypeInfo(railtype);
const DrawTrackSeqStruct *dtss;
ormod = PLAYER_SPRITE_COLOR(_local_player);
dtss = _track_depot_layout_table[image];
x += 33;
y += 17;
img = dtss++->image;
/* @note This is kind of an ugly hack, as the PALETTE_MODIFIER_COLOR indicates
* whether the sprite is railtype dependent. Rewrite this asap */
if (img & PALETTE_MODIFIER_COLOR) img = (img & SPRITE_MASK) + rti->total_offset;
DrawSprite(img, x, y);
for (; dtss->image != 0; dtss++) {
Point pt = RemapCoords(dtss->subcoord_x, dtss->subcoord_y, 0);
image = dtss->image;
if (image & PALETTE_MODIFIER_COLOR) image |= ormod;
DrawSprite(image + rti->total_offset, x + pt.x, y + pt.y);
}
}
void DrawDefaultWaypointSprite(int x, int y, RailType railtype)
{
const DrawTrackSeqStruct *dtss = _track_waypoint_layout_table[0];
const RailtypeInfo *rti = GetRailTypeInfo(railtype);
uint32 img;
img = dtss++->image;
if (img & PALETTE_MODIFIER_COLOR) img = (img & SPRITE_MASK) + rti->total_offset;
DrawSprite(img, x, y);
for (; dtss->image != 0; dtss++) {
Point pt = RemapCoords(dtss->subcoord_x, dtss->subcoord_y, 0);
img = dtss->image;
if (img & PALETTE_MODIFIER_COLOR) img |= PLAYER_SPRITE_COLOR(_local_player);
DrawSprite(img, x + pt.x, y + pt.y);
}
}
typedef struct SetSignalsData {
int cur;
int cur_stack;
bool stop;
bool has_presignal;
// presignal info
int presignal_exits;
int presignal_exits_free;
// these are used to keep track of the signals that change.
byte bit[NUM_SSD_ENTRY];
TileIndex tile[NUM_SSD_ENTRY];
// these are used to keep track of the stack that modifies presignals recursively
TileIndex next_tile[NUM_SSD_STACK];
byte next_dir[NUM_SSD_STACK];
} SetSignalsData;
static bool SetSignalsEnumProc(TileIndex tile, SetSignalsData *ssd, int track, uint length, byte *state)
{
if (!IsTileType(tile, MP_RAILWAY)) return false;
// the tile has signals?
if (HasSignalOnTrack(tile, TrackdirToTrack(track))) {
if (HasSignalOnTrackdir(tile, ReverseTrackdir(track))) {
// yes, add the signal to the list of signals
if (ssd->cur != NUM_SSD_ENTRY) {
ssd->tile[ssd->cur] = tile; // remember the tile index
ssd->bit[ssd->cur] = track; // and the controlling bit number
ssd->cur++;
}
// remember if this block has a presignal.
ssd->has_presignal |= IsPresignalEntry(tile);
}
if (HasSignalOnTrackdir(tile, track) && IsPresignalExit(tile)) {
// this is an exit signal that points out from the segment
ssd->presignal_exits++;
if (GetSignalStateByTrackdir(tile, track) != SIGNAL_STATE_RED)
ssd->presignal_exits_free++;
}
return true;
} else if (IsTileDepotType(tile, TRANSPORT_RAIL)) {
return true; // don't look further if the tile is a depot
}
return false;
}
/* Struct to parse data from VehicleFromPos to SignalVehicleCheckProc */
typedef struct SignalVehicleCheckStruct {
TileIndex tile;
uint track;
} SignalVehicleCheckStruct;
static void *SignalVehicleCheckProc(Vehicle *v, void *data)
{
const SignalVehicleCheckStruct* dest = data;
TileIndex tile;
if (v->type != VEH_Train) return NULL;
/* Find the tile outside the tunnel, for signalling */
if (v->u.rail.track == 0x40) {
tile = GetVehicleOutOfTunnelTile(v);
} else {
tile = v->tile;
}
/* Wrong tile, or no train? Not a match */
if (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;
/** @todo "Hackish" fix for the tunnel problems. This is needed because a tunnel
* is some kind of invisible black hole, and there is some special magic going
* on in there. This 'workaround' can be removed once the maprewrite is done.
*/
if (IsTunnelTile(tile)) {
// It is a tunnel we're checking, we need to do some special stuff
// because VehicleFromPos will not find the vihicle otherwise
TileIndex end = GetOtherTunnelEnd(tile);
DiagDirection direction = GetTunnelDirection(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 "hidden" vehicle
// NOTE: the hashes for tiles may overlap, so this could maybe be optimised a bit by not checking every tile?
dest.track = 0x40; // trackbit for vehicles "hidden" inside a tunnel
for (; tile != end; tile += TileOffsByDir(direction)) {
if (VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL)
return true;
}
// no vehicle found
return false;
}
return VehicleFromPos(tile, &dest, SignalVehicleCheckProc) != NULL;
}
static void SetSignalsAfterProc(TrackPathFinder *tpf)
{
SetSignalsData *ssd = tpf->userdata;
const TrackPathFinderLink* link;
uint offs;
uint i;
ssd->stop = false;
/* Go through all the PF tiles */
for (i = 0; i < lengthof(tpf->hash_head); i++) {
/* Empty hash item */
if (tpf->hash_head[i] == 0) continue;
/* If 0x8000 is not set, there is only 1 item */
if (!(tpf->hash_head[i] & 0x8000)) {
/* Check if there is a vehicle on this tile */
if (SignalVehicleCheck(tpf->hash_tile[i], tpf->hash_head[i])) {
ssd->stop = true;
return;
}
} else {
/* There are multiple items, where hash_tile points to the first item in the list */
offs = tpf->hash_tile[i];
do {
/* Find the next item */
link = PATHFIND_GET_LINK_PTR(tpf, offs);
/* Check if there is a vehicle on this tile */
if (SignalVehicleCheck(link->tile, link->flags)) {
ssd->stop = true;
return;
}
/* Goto the next item */
} while ((offs = link->next) != 0xFFFF);
}
}
}
static const byte _dir_from_track[14] = {
0,1,0,1,2,1, 0,0,
2,3,3,2,3,0,
};
static void ChangeSignalStates(SetSignalsData *ssd)
{
int i;
// thinking about presignals...
// the presignal is green if,
// if no train is in the segment AND
// there is at least one green exit signal OR
// there are no exit signals in the segment
// then mark the signals in the segment accordingly
for (i = 0; i != ssd->cur; i++) {
TileIndex tile = ssd->tile[i];
byte bit = SignalAgainstTrackdir(ssd->bit[i]);
uint16 m2 = _m[tile].m2;
// presignals don't turn green if there is at least one presignal exit and none are free
if (IsPresignalEntry(tile)) {
int ex = ssd->presignal_exits, exfree = ssd->presignal_exits_free;
// subtract for dual combo signals so they don't count themselves
if (IsPresignalExit(tile) && HasSignalOnTrackdir(tile, ssd->bit[i])) {
ex--;
if (GetSignalStateByTrackdir(tile, ssd->bit[i]) != SIGNAL_STATE_RED) exfree--;
}
// if we have exits and none are free, make red.
if (ex && !exfree) goto make_red;
}
// check if the signal is unaffected.
if (ssd->stop) {
make_red:
// turn red
if ((bit & m2) == 0) continue;
} else {
// turn green
if ((bit & m2) != 0) continue;
}
/* Update signals on the other side of this exit-combo signal; it changed. */
if (IsPresignalExit(tile)) {
if (ssd->cur_stack != NUM_SSD_STACK) {
ssd->next_tile[ssd->cur_stack] = tile;
ssd->next_dir[ssd->cur_stack] = _dir_from_track[ssd->bit[i]];
ssd->cur_stack++;
} else {
printf("NUM_SSD_STACK too small\n"); /// @todo WTF is this???
}
}
// it changed, so toggle it
_m[tile].m2 = m2 ^ bit;
MarkTileDirtyByTile(tile);
}
}
bool UpdateSignalsOnSegment(TileIndex tile, DiagDirection direction)
{
SetSignalsData ssd;
int result = -1;
ssd.cur_stack = 0;
for (;;) {
// go through one segment and update all signals pointing into that segment.
ssd.cur = ssd.presignal_exits = ssd.presignal_exits_free = 0;
ssd.has_presignal = false;
FollowTrack(tile, 0xC000 | TRANSPORT_RAIL, direction, (TPFEnumProc*)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(const TileInfo* ti)
{
Slope tileh = ti->tileh;
uint z = ti->z;
if (tileh == SLOPE_FLAT) return z;
if (GetRailTileType(ti->tile) == RAIL_TILE_DEPOT_WAYPOINT) {
return z + TILE_HEIGHT;
} else {
uint f = GetRailFoundation(ti->tileh, GetTrackBits(ti->tile));
if (f != 0) {
if (f < 15) return z + TILE_HEIGHT; // leveled foundation
tileh = _inclined_tileh[f - 15]; // inclined foundation
}
return z + GetPartialZ(ti->x & 0xF, ti->y & 0xF, tileh);
}
}
static Slope GetSlopeTileh_Track(TileIndex tile, Slope tileh)
{
if (tileh == SLOPE_FLAT) return SLOPE_FLAT;
if (GetRailTileType(tile) == RAIL_TILE_DEPOT_WAYPOINT) {
return SLOPE_FLAT;
} else {
uint f = GetRailFoundation(tileh, GetTrackBits(tile));
if (f == 0) return tileh;
if (f < 15) return SLOPE_FLAT; // leveled foundation
return _inclined_tileh[f - 15]; // inclined foundation
}
}
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 = old_ground;
bool quick_return = false;
switch (_opt.landscape) {
case LT_HILLY:
if (GetTileZ(tile) > _opt.snow_line) {
new_ground = RAIL_GROUND_ICE_DESERT;
quick_return = true;
}
break;
case LT_DESERT:
if (GetTropicZone(tile) == TROPICZONE_DESERT) {
new_ground = RAIL_GROUND_ICE_DESERT;
quick_return = true;
}
break;
}
if (new_ground != old_ground) {
SetRailGroundType(tile, new_ground);
MarkTileDirtyByTile(tile);
}
if (quick_return) return;
// Don't continue tile loop for depots
if (GetRailTileType(tile) == RAIL_TILE_DEPOT_WAYPOINT) 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;
}
}
}
if (old_ground != new_ground) {
SetRailGroundType(tile, new_ground);
MarkTileDirtyByTile(tile);
}
}
static uint32 GetTileTrackStatus_Track(TileIndex tile, TransportType mode)
{
byte a;
uint16 b;
if (mode != TRANSPORT_RAIL) return 0;
if (GetRailTileType(tile) != RAIL_TILE_DEPOT_WAYPOINT) {
TrackBits rails = GetTrackBits(tile);
uint32 ret = rails * 0x101;
if (GetRailTileType(tile) != RAIL_TILE_SIGNALS) {
if (rails == TRACK_BIT_CROSS) ret |= 0x40;
} else {
/* has_signals */
a = _m[tile].m3;
b = _m[tile].m2;
b &= a;
/* When signals are not present (in neither
* direction), we pretend them to be green. (So if
* signals are only one way, the other way will
* implicitely become `red' */
if ((a & 0xC0) == 0) b |= 0xC0;
if ((a & 0x30) == 0) b |= 0x30;
if ((b & 0x80) == 0) ret |= 0x10070000;
if ((b & 0x40) == 0) ret |= 0x07100000;
if ((b & 0x20) == 0) ret |= 0x20080000;
if ((b & 0x10) == 0) ret |= 0x08200000;
}
return ret;
} else {
if (GetRailTileSubtype(tile) == RAIL_SUBTYPE_DEPOT) {
return (DiagDirToAxis(GetRailDepotDirection(tile)) == AXIS_X ? TRACK_BIT_X : TRACK_BIT_Y) * 0x101;
} else {
return GetRailWaypointBits(tile) * 0x101;
}
}
}
static void ClickTile_Track(TileIndex tile)
{
if (IsTileDepotType(tile, TRANSPORT_RAIL)) {
ShowTrainDepotWindow(tile);
} else if (IsRailWaypoint(tile)) {
ShowRenameWaypointWindow(GetWaypointByTile(tile));
}
}
static void GetTileDesc_Track(TileIndex tile, TileDesc *td)
{
td->owner = GetTileOwner(tile);
switch (GetRailTileType(tile)) {
case RAIL_TILE_NORMAL:
td->str = STR_1021_RAILROAD_TRACK;
break;
case RAIL_TILE_SIGNALS: {
const StringID signal_type[] = {
STR_RAILROAD_TRACK_WITH_NORMAL_SIGNALS,
STR_RAILROAD_TRACK_WITH_PRESIGNALS,
STR_RAILROAD_TRACK_WITH_EXITSIGNALS,
STR_RAILROAD_TRACK_WITH_COMBOSIGNALS
};
td->str = signal_type[GetSignalType(tile)];
break;
}
case RAIL_TILE_DEPOT_WAYPOINT:
default:
td->str = (GetRailTileSubtype(tile) == RAIL_SUBTYPE_DEPOT) ?
STR_1023_RAILROAD_TRAIN_DEPOT : STR_LANDINFO_WAYPOINT;
break;
}
}
static void ChangeTileOwner_Track(TileIndex tile, PlayerID old_player, PlayerID new_player)
{
if (!IsTileOwner(tile, old_player)) return;
if (new_player != OWNER_SPECTATOR) {
SetTileOwner(tile, new_player);
} else {
DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
}
}
static const byte _fractcoords_behind[4] = { 0x8F, 0x8, 0x80, 0xF8 };
static const byte _fractcoords_enter[4] = { 0x8A, 0x48, 0x84, 0xA8 };
static const byte _deltacoord_leaveoffset[8] = {
-1, 0, 1, 0, /* x */
0, 1, 0, -1 /* y */
};
static uint32 VehicleEnter_Track(Vehicle *v, TileIndex tile, int x, int y)
{
byte fract_coord;
byte fract_coord_leave;
DiagDirection dir;
int length;
// this routine applies only to trains in depot tiles
if (v->type != VEH_Train || !IsTileDepotType(tile, TRANSPORT_RAIL)) return 0;
/* depot direction */
dir = GetRailDepotDirection(tile);
/* calculate the point where the following wagon should be activated */
/* this depends on the length of the current vehicle */
length = v->u.rail.cached_veh_length;
fract_coord_leave =
((_fractcoords_enter[dir] & 0x0F) + // x
(length + 1) * _deltacoord_leaveoffset[dir]) +
(((_fractcoords_enter[dir] >> 4) + // y
((length + 1) * _deltacoord_leaveoffset[dir+4])) << 4);
fract_coord = (x & 0xF) + ((y & 0xF) << 4);
if (_fractcoords_behind[dir] == fract_coord) {
/* make sure a train is not entering the tile from behind */
return 8;
} else if (_fractcoords_enter[dir] == fract_coord) {
if (DiagDirToDir(ReverseDiagDir(dir)) == v->direction) {
/* enter the depot */
v->u.rail.track = 0x80,
v->vehstatus |= VS_HIDDEN; /* hide it */
v->direction = ReverseDir(v->direction);
if (v->next == NULL)
TrainEnterDepot(v, tile);
v->tile = tile;
InvalidateWindow(WC_VEHICLE_DEPOT, tile);
return 4;
}
} else if (fract_coord_leave == fract_coord) {
if (DiagDirToDir(dir) == v->direction) {
/* leave the depot? */
if ((v = v->next) != NULL) {
v->vehstatus &= ~VS_HIDDEN;
v->u.rail.track = (DiagDirToAxis(dir) == AXIS_X ? 1 : 2);
}
}
}
return 0;
}
const TileTypeProcs _tile_type_rail_procs = {
DrawTile_Track, /* draw_tile_proc */
GetSlopeZ_Track, /* get_slope_z_proc */
ClearTile_Track, /* clear_tile_proc */
GetAcceptedCargo_Track, /* get_accepted_cargo_proc */
GetTileDesc_Track, /* get_tile_desc_proc */
GetTileTrackStatus_Track, /* get_tile_track_status_proc */
ClickTile_Track, /* click_tile_proc */
AnimateTile_Track, /* animate_tile_proc */
TileLoop_Track, /* tile_loop_clear */
ChangeTileOwner_Track, /* change_tile_owner_clear */
NULL, /* get_produced_cargo_proc */
VehicleEnter_Track, /* vehicle_enter_tile_proc */
GetSlopeTileh_Track, /* get_slope_tileh_proc */
};
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