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OpenTTD-patches/rail_cmd.c
tron 087fe86ed2 (svn r3564) Several smaller changes: 
- Don't treat non-booleans as booleans
- Reduce variable scope
- Bracing
- Use DeMorgan's law to make conditionals easier to read
- if cascade -> switch
- Replace some magic numbers by symbolic names
- Avoid assignments within other statements
2006-02-06 09:18:04 +00:00

2174 lines
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/* $Id$ */
#include "stdafx.h"
#include "openttd.h"
#include "debug.h"
#include "functions.h"
#include "table/sprites.h"
#include "table/strings.h"
#include "map.h"
#include "tile.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
extern uint16 _custom_sprites_base;
const byte _track_sloped_sprites[14] = {
14, 15, 22, 13,
0, 21, 17, 12,
23, 0, 18, 20,
19, 16
};
void ShowTrainDepotWindow(TileIndex tile);
/* Format of rail map5 byte.
* 00 abcdef => Normal rail
* 01 abcdef => Rail with signals
* 10 ?????? => Unused
* 11 ????dd => Depot
*
* abcdef is a bitmask, which contains ones for all present tracks. Below the
* value for each track is given.
*/
/* 4
* ---------
* |\ /|
* | \ 1/ |
* | \ / |
* | \ / |
* 16| \ |32
* | / \2 |
* | / \ |
* | / \ |
* |/ \|
* ---------
* 8
*/
// Constants for lower part of Map2 byte.
enum RailMap2Lower4 {
RAIL_MAP2LO_GROUND_MASK = 0xF,
RAIL_GROUND_BROWN = 0,
RAIL_GROUND_GREEN = 1,
RAIL_GROUND_FENCE_NW = 2,
RAIL_GROUND_FENCE_SE = 3,
RAIL_GROUND_FENCE_SENW = 4,
RAIL_GROUND_FENCE_NE = 5,
RAIL_GROUND_FENCE_SW = 6,
RAIL_GROUND_FENCE_NESW = 7,
RAIL_GROUND_FENCE_VERT1 = 8,
RAIL_GROUND_FENCE_VERT2 = 9,
RAIL_GROUND_FENCE_HORIZ1 = 10,
RAIL_GROUND_FENCE_HORIZ2 = 11,
RAIL_GROUND_ICE_DESERT = 12,
};
/* 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_TYPE_NORMAL && type != RAIL_TYPE_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_TYPE_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_UPPER | TRACK_BIT_LOWER) ||
future == (TRACK_BIT_LEFT | TRACK_BIT_RIGHT);
} else {
/* Normally, we may overlap and any combination is valid */
return true;
}
}
static const byte _valid_tileh_slopes[4][15] = {
// set of normal ones
{
TRACK_BIT_DIAG1|TRACK_BIT_DIAG2|TRACK_BIT_UPPER|TRACK_BIT_LOWER|TRACK_BIT_LEFT|TRACK_BIT_RIGHT,
TRACK_BIT_RIGHT,
TRACK_BIT_UPPER,
TRACK_BIT_DIAG1,
TRACK_BIT_LEFT,
0,
TRACK_BIT_DIAG2,
TRACK_BIT_LOWER,
TRACK_BIT_LOWER,
TRACK_BIT_DIAG2,
0,
TRACK_BIT_LEFT,
TRACK_BIT_DIAG1,
TRACK_BIT_UPPER,
TRACK_BIT_RIGHT,
},
// allowed rail for an evenly raised platform
{
0,
TRACK_BIT_LEFT,
TRACK_BIT_LOWER,
TRACK_BIT_DIAG2 | TRACK_BIT_LOWER | TRACK_BIT_LEFT,
TRACK_BIT_RIGHT,
TRACK_BIT_DIAG1|TRACK_BIT_DIAG2|TRACK_BIT_UPPER|TRACK_BIT_LOWER|TRACK_BIT_LEFT|TRACK_BIT_RIGHT,
TRACK_BIT_DIAG1 | TRACK_BIT_LOWER | TRACK_BIT_RIGHT,
TRACK_BIT_DIAG1|TRACK_BIT_DIAG2|TRACK_BIT_UPPER|TRACK_BIT_LOWER|TRACK_BIT_LEFT|TRACK_BIT_RIGHT,
TRACK_BIT_UPPER,
TRACK_BIT_DIAG1 | TRACK_BIT_UPPER | TRACK_BIT_LEFT,
TRACK_BIT_DIAG1|TRACK_BIT_DIAG2|TRACK_BIT_UPPER|TRACK_BIT_LOWER|TRACK_BIT_LEFT|TRACK_BIT_RIGHT,
TRACK_BIT_DIAG1|TRACK_BIT_DIAG2|TRACK_BIT_UPPER|TRACK_BIT_LOWER|TRACK_BIT_LEFT|TRACK_BIT_RIGHT,
TRACK_BIT_DIAG2 | TRACK_BIT_UPPER | TRACK_BIT_RIGHT,
TRACK_BIT_DIAG1|TRACK_BIT_DIAG2|TRACK_BIT_UPPER|TRACK_BIT_LOWER|TRACK_BIT_LEFT|TRACK_BIT_RIGHT,
TRACK_BIT_DIAG1|TRACK_BIT_DIAG2|TRACK_BIT_UPPER|TRACK_BIT_LOWER|TRACK_BIT_LEFT|TRACK_BIT_RIGHT,
},
// allowed rail on coast tile
{
0,
TRACK_BIT_LEFT,
TRACK_BIT_LOWER,
TRACK_BIT_DIAG2|TRACK_BIT_LEFT|TRACK_BIT_LOWER,
TRACK_BIT_RIGHT,
TRACK_BIT_DIAG1|TRACK_BIT_DIAG2|TRACK_BIT_UPPER|TRACK_BIT_LOWER|TRACK_BIT_LEFT|TRACK_BIT_RIGHT,
TRACK_BIT_DIAG1|TRACK_BIT_RIGHT|TRACK_BIT_LOWER,
TRACK_BIT_DIAG1|TRACK_BIT_DIAG2|TRACK_BIT_UPPER|TRACK_BIT_LOWER|TRACK_BIT_LEFT|TRACK_BIT_RIGHT,
TRACK_BIT_UPPER,
TRACK_BIT_DIAG1|TRACK_BIT_LEFT|TRACK_BIT_UPPER,
TRACK_BIT_DIAG1|TRACK_BIT_DIAG2|TRACK_BIT_UPPER|TRACK_BIT_LOWER|TRACK_BIT_LEFT|TRACK_BIT_RIGHT,
TRACK_BIT_DIAG1|TRACK_BIT_DIAG2|TRACK_BIT_UPPER|TRACK_BIT_LOWER|TRACK_BIT_LEFT|TRACK_BIT_RIGHT,
TRACK_BIT_DIAG2|TRACK_BIT_RIGHT|TRACK_BIT_UPPER,
TRACK_BIT_DIAG1|TRACK_BIT_DIAG2|TRACK_BIT_UPPER|TRACK_BIT_LOWER|TRACK_BIT_LEFT|TRACK_BIT_RIGHT,
TRACK_BIT_DIAG1|TRACK_BIT_DIAG2|TRACK_BIT_UPPER|TRACK_BIT_LOWER|TRACK_BIT_LEFT|TRACK_BIT_RIGHT,
},
// valid railway crossings on slopes
{
1, 0, 0, // 0, 1, 2
0, 0, 1, // 3, 4, 5
0, 1, 0, // 6, 7, 8
0, 1, 1, // 9, 10, 11
0, 1, 1, // 12, 13, 14
}
};
uint GetRailFoundation(uint tileh, uint bits)
{
int i;
if ((~_valid_tileh_slopes[0][tileh] & bits) == 0)
return 0;
if ((~_valid_tileh_slopes[1][tileh] & bits) == 0)
return tileh;
if ((
(i = 0, tileh == 1) ||
(i += 2, tileh == 2) ||
(i += 2, tileh == 4) ||
(i += 2, tileh == 8)
) && (
bits == TRACK_BIT_DIAG1 ||
(i++, bits == TRACK_BIT_DIAG2)
)) {
return i + 15;
} else {
return 0;
}
}
static uint32 CheckRailSlope(uint tileh, TrackBits rail_bits, TrackBits existing, TileIndex tile)
{
// never allow building on top of steep tiles
if (!IsSteepTileh(tileh)) {
rail_bits |= existing;
// don't allow building on the lower side of a coast
if (IsTileType(tile, MP_WATER) &&
~_valid_tileh_slopes[2][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_DIAG1 || rail_bits == TRACK_BIT_DIAG2) &&
(tileh == 1 || tileh == 2 || tileh == 4 || tileh == 8)
)) { // 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 x,y coordinates on where to build
* @param p1 railtype of being built piece (normal, mono, maglev)
* @param p2 rail track to build
*/
int32 CmdBuildSingleRail(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
TileIndex tile;
uint tileh;
uint m5; /* XXX: Used only as a cache, should probably be removed? */
Track track = (Track)p2;
TrackBits trackbit;
int32 cost = 0;
int32 ret;
if (!ValParamRailtype(p1) || !ValParamTrackOrientation(track)) return CMD_ERROR;
tile = TileVirtXY(x, y);
tileh = GetTileSlope(tile, NULL);
m5 = _m[tile].m5;
trackbit = TrackToTrackBits(track);
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
switch (GetTileType(tile)) {
case MP_TUNNELBRIDGE:
if ((m5 & 0xC0) != 0xC0 || // not bridge middle part?
(m5 & 0x01 ? TRACK_BIT_DIAG1 : TRACK_BIT_DIAG2) != trackbit) { // wrong direction?
// Get detailed error message
return DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
}
switch (m5 & 0x38) { // what's under the bridge?
case 0x00: // clear land
ret = CheckRailSlope(tileh, trackbit, 0, tile);
if (CmdFailed(ret)) return ret;
cost += ret;
if (flags & DC_EXEC) {
SetTileOwner(tile, _current_player);
SB(_m[tile].m3, 0, 4, p1);
_m[tile].m5 = (m5 & 0xC7) | 0x20; // railroad under bridge
}
break;
case 0x20: // rail already there
return_cmd_error(STR_1007_ALREADY_BUILT);
default:
// Get detailed error message
return DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
}
break;
case MP_RAILWAY:
if (!CheckTrackCombination(tile, trackbit, flags) ||
!EnsureNoVehicle(tile)) {
return CMD_ERROR;
}
if (m5 & RAIL_TYPE_SPECIAL ||
!IsTileOwner(tile, _current_player) ||
GB(_m[tile].m3, 0, 4) != p1) {
// Get detailed error message
return DoCommandByTile(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) {
_m[tile].m2 &= ~RAIL_MAP2LO_GROUND_MASK; // Bare land
_m[tile].m5 = m5 | trackbit;
}
break;
case MP_STREET:
if (!_valid_tileh_slopes[3][tileh]) // prevent certain slopes
return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
if (!EnsureNoVehicle(tile)) return CMD_ERROR;
if ((m5 & 0xF0) == 0 && ( // normal road?
(track == TRACK_DIAG1 && m5 == 0x05) ||
(track == TRACK_DIAG2 && m5 == 0x0A) // correct direction?
)) {
if (flags & DC_EXEC) {
_m[tile].m3 = GetTileOwner(tile);
SetTileOwner(tile, _current_player);
_m[tile].m4 = p1;
_m[tile].m5 = 0x10 | (track == TRACK_DIAG1 ? 0x08 : 0x00); // level crossing
}
break;
}
if (IsLevelCrossing(tile) && (m5 & 0x08 ? TRACK_DIAG1 : TRACK_DIAG2) == track)
return_cmd_error(STR_1007_ALREADY_BUILT);
/* FALLTHROUGH */
default:
ret = CheckRailSlope(tileh, trackbit, 0, tile);
if (CmdFailed(ret)) return ret;
cost += ret;
ret = DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
if (CmdFailed(ret)) return ret;
cost += ret;
if (flags & DC_EXEC) {
SetTileType(tile, MP_RAILWAY);
SetTileOwner(tile, _current_player);
_m[tile].m2 = 0; // Bare land
_m[tile].m3 = p1; // No signals, rail type
_m[tile].m5 = trackbit;
}
break;
}
if (flags & DC_EXEC) {
MarkTileDirtyByTile(tile);
SetSignalsOnBothDir(tile, track);
}
return cost + _price.build_rail;
}
/** Remove a single piece of track
* @param x,y coordinates for removal of track
* @param p1 unused
* @param p2 rail orientation
*/
int32 CmdRemoveSingleRail(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
Track track = (Track)p2;
TrackBits trackbit;
TileIndex tile;
byte m5;
int32 cost = _price.remove_rail;
if (!ValParamTrackOrientation(p2)) return CMD_ERROR;
trackbit = TrackToTrackBits(track);
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
tile = TileVirtXY(x, y);
if (!IsTileType(tile, MP_TUNNELBRIDGE) && !IsTileType(tile, MP_STREET) && !IsTileType(tile, MP_RAILWAY))
return CMD_ERROR;
if (_current_player != OWNER_WATER && !CheckTileOwnership(tile))
return CMD_ERROR;
// allow building rail under bridge
if (!IsTileType(tile, MP_TUNNELBRIDGE) && !EnsureNoVehicle(tile))
return CMD_ERROR;
switch (GetTileType(tile))
{
case MP_TUNNELBRIDGE:
if (!EnsureNoVehicleZ(tile, TilePixelHeight(tile)))
return CMD_ERROR;
if ((_m[tile].m5 & 0xF8) != 0xE0)
return CMD_ERROR;
if ((_m[tile].m5 & 1 ? TRACK_BIT_DIAG1 : TRACK_BIT_DIAG2) != trackbit)
return CMD_ERROR;
if (!(flags & DC_EXEC))
return _price.remove_rail;
SetTileOwner(tile, OWNER_NONE);
_m[tile].m5 = _m[tile].m5 & 0xC7;
break;
case MP_STREET:
if (!IsLevelCrossing(tile)) return CMD_ERROR;
/* This is a crossing, let's check if the direction is correct */
if (_m[tile].m5 & 8) {
m5 = 5;
if (track != TRACK_DIAG1)
return CMD_ERROR;
} else {
m5 = 10;
if (track != TRACK_DIAG2)
return CMD_ERROR;
}
if (!(flags & DC_EXEC))
return _price.remove_rail;
_m[tile].m5 = m5;
SetTileOwner(tile, _m[tile].m3);
_m[tile].m2 = 0;
break;
case MP_RAILWAY:
if (!IsPlainRailTile(tile))
return CMD_ERROR;
/* See if the track to remove is actually there */
if (!(GetTrackBits(tile) & trackbit))
return CMD_ERROR;
/* Charge extra to remove signals on the track, if they are there */
if (HasSignalOnTrack(tile, track))
cost += DoCommand(x, y, track, 0, flags, CMD_REMOVE_SIGNALS);
if (!(flags & DC_EXEC))
return cost;
/* We remove the trackbit here. */
_m[tile].m5 &= ~trackbit;
if (GetTrackBits(tile) == 0) {
/* The tile has no tracks left, it is no longer a rail tile */
DoClearSquare(tile);
/* XXX: This is an optimisation, right? Is it really worth the ugly goto? */
goto skip_mark_dirty;
}
break;
default:
assert(0);
}
/* mark_dirty */
MarkTileDirtyByTile(tile);
skip_mark_dirty:;
SetSignalsOnBothDir(tile, track);
return cost;
}
static const struct {
int8 xinc[16];
int8 yinc[16];
} _railbit = {{
// 0 1 2 3 4 5
-16, 0,-16, 0, 16, 0, 0, 0,
16, 0, 0, 16, 0,-16, 0, 0,
},{
0, 16, 0, 16, 0, 16, 0, 0,
0,-16,-16, 0,-16, 0, 0, 0,
}};
static int32 ValidateAutoDrag(Trackdir *trackdir, int x, int y, int ex, int ey)
{
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 = _railbit.xinc[*trackdir];
trdy = _railbit.yinc[*trackdir];
if (!IsDiagonalTrackdir(*trackdir)) {
trdx += _railbit.xinc[*trackdir ^ 1];
trdy += _railbit.yinc[*trackdir ^ 1];
}
// 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 = _railbit.xinc[*trackdir];
trdy = _railbit.yinc[*trackdir];
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 x,y 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(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
int ex, ey;
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);
if (!ValParamRailtype(railtype) || !ValParamTrackOrientation(track)) return CMD_ERROR;
if (p1 >= MapSize()) return CMD_ERROR;
trackdir = TrackToTrackdir(track);
/* unpack end point */
ex = TileX(p1) * TILE_SIZE;
ey = TileY(p1) * TILE_SIZE;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
if (CmdFailed(ValidateAutoDrag(&trackdir, x, y, ex, ey))) return CMD_ERROR;
if (flags & DC_EXEC) SndPlayTileFx(SND_20_SPLAT_2, TileVirtXY(x, y));
for (;;) {
ret = DoCommand(x, y, 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;
} else
total_cost += ret;
if (x == ex && y == ey)
break;
x += _railbit.xinc[trackdir];
y += _railbit.yinc[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(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
return CmdRailTrackHelper(x, y, flags, p1, CLRBIT(p2, 7));
}
/** Build rail on a stretch of track.
* Stub for the unified rail builder/remover
* @see CmdRailTrackHelper
*/
int32 CmdRemoveRailroadTrack(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
return CmdRailTrackHelper(x, y, flags, p1, SETBIT(p2, 7));
}
/** Build a train depot
* @param x,y position of the train depot
* @param p1 rail type
* @param p2 depot direction (0 through 3), where 0 is NE, 1 is SE, 2 is SW, 3 is NW
*
* @todo When checking for the tile slope,
* distingush between "Flat land required" and "land sloped in wrong direction"
*/
int32 CmdBuildTrainDepot(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
Depot *d;
TileIndex tile = TileVirtXY(x, y);
int32 cost, ret;
uint 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 != 0 && (
_is_old_ai_player ||
!_patches.build_on_slopes ||
IsSteepTileh(tileh) ||
!CanBuildDepotByTileh(p2, tileh)
)) {
return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
}
ret = DoCommandByTile(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) {
if (IsLocalPlayer()) _last_built_train_depot_tile = tile;
ModifyTile(tile,
MP_SETTYPE(MP_RAILWAY) |
MP_MAP3LO | MP_MAPOWNER_CURRENT | MP_MAP5,
p1, /* map3_lo */
p2 | RAIL_TYPE_DEPOT_WAYPOINT /* map5 */
);
d->xy = tile;
d->town_index = ClosestTownFromTile(tile, (uint)-1)->index;
SetSignalsOnBothDir(tile, (p2 & 1) ? 2 : 1);
}
return cost + _price.build_train_depot;
}
/** Build signals, alternate between double/single, signal/semaphore,
* pre/exit/combo-signals, and what-else not
* @param x,y coordinates where signals is being built
* @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(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
TileIndex tile = TileVirtXY(x, y);
bool semaphore;
bool pre_signal;
Track track = (Track)(p1 & 0x7);
int32 cost;
// Same bit, used in different contexts
semaphore = 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_UPPER | TRACK_BIT_LOWER) && /* Horizontal parallel, non-intersecting tracks */
trackbits != (TRACK_BIT_LEFT | TRACK_BIT_RIGHT) /* Vertical parallel, non-intersecting tracks */
)
return CMD_ERROR;
}
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
if (!HasSignalOnTrack(tile, track)) {
// build new signals
cost = _price.build_signals;
} else {
if (p2 != 0 && semaphore != HasSemaphores(tile, track)) {
// 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_TYPE_SIGNALS) {
// there are no signals at all on this tile yet
_m[tile].m5 |= RAIL_TYPE_SIGNALS; // change into signals
_m[tile].m2 |= 0xF0; // all signals are on
_m[tile].m3 &= ~0xF0; // no signals built by default
_m[tile].m4 = semaphore ? SIG_SEMAPHORE_MASK : 0;
}
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 -> ...
byte type = (GetSignalType(tile, track) + 1) % SIGTYPE_END;
SB(_m[tile].m4, 0, 2, type);
} else {
// cycle between two-way -> one-way -> one-way -> ...
/* TODO: Rewrite switch into something more general */
switch (track) {
case TRACK_LOWER:
case TRACK_RIGHT: {
byte signal = (_m[tile].m3 - 0x10) & 0x30;
if (signal == 0) signal = 0x30;
_m[tile].m3 &= ~0x30;
_m[tile].m3 |= signal;
break;
}
default: {
byte signal = (_m[tile].m3 - 0x40) & 0xC0;
if (signal == 0) signal = 0xC0;
_m[tile].m3 &= ~0xC0;
_m[tile].m3 |= signal;
break;
}
}
}
}
} 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);
// convert between signal<->semaphores when dragging
if (semaphore) {
SETBIT(_m[tile].m4, 2);
} else {
CLRBIT(_m[tile].m4, 2);
}
}
MarkTileDirtyByTile(tile);
SetSignalsOnBothDir(tile, track);
}
return cost;
}
/** Build many signals by dragging; AutoSignals
* @param x,y 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(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
int ex, ey;
int32 ret, total_cost, signal_ctr;
byte signals;
TileIndex tile = TileVirtXY(x, y);
bool error = true;
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;
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;
// unpack end tile
ex = TileX(p1) * TILE_SIZE;
ey = TileY(p1) * TILE_SIZE;
if (CmdFailed(ValidateAutoDrag(&trackdir, x, y, ex, ey))) 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_TYPE_SIGNALS && GetTrackBits(tile) != 0) { /* XXX: GetTrackBits check useless? */
signals = _m[tile].m3 & SignalOnTrack(track);
if (signals == 0) signals = SignalOnTrack(track); /* Can this actually occur? */
semaphores = (HasSemaphores(tile, track) ? 8 : 0); // copy signal/semaphores style (independent of CTRL)
} 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(x, y, 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;
} else {
error = false;
total_cost += ret;
}
}
if (ex == x && ey == y) break; // reached end of drag
x += _railbit.xinc[trackdir];
y += _railbit.yinc[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(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
return CmdSignalTrackHelper(x, y, flags, p1, p2);
}
/** Remove signals
* @param x,y coordinates where signal is being deleted from
* @param p1 track to remove signal from (Track enum)
*/
int32 CmdRemoveSingleSignal(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
TileIndex tile = TileVirtXY(x, y);
Track track = (Track)(p1 & 0x7);
if (!ValParamTrackOrientation(track) || !IsTileType(tile, MP_RAILWAY) || !EnsureNoVehicle(tile))
return CMD_ERROR;
if (!HasSignalOnTrack(tile, track)) // no signals on 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_TYPE_NORMAL >> 6); // XXX >> because the constant is meant for direct application, not use with SB
CLRBIT(_m[tile].m4, 2); // remove any possible semaphores
}
SetSignalsOnBothDir(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(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
return CmdSignalTrackHelper(x, y, flags, p1, SETBIT(p2, 0));
}
typedef int32 DoConvertRailProc(TileIndex tile, uint totype, bool exec);
static int32 DoConvertRail(TileIndex tile, uint totype, bool exec)
{
if (!CheckTileOwnership(tile) || !EnsureNoVehicle(tile)) return CMD_ERROR;
// tile is already of requested type?
if (GetRailType(tile) == totype) return CMD_ERROR;
// change type.
if (exec) {
SB(_m[tile].m3, 0, 4, totype);
MarkTileDirtyByTile(tile);
}
return _price.build_rail / 2;
}
extern int32 DoConvertStationRail(TileIndex tile, uint totype, bool exec);
extern int32 DoConvertStreetRail(TileIndex tile, uint totype, bool exec);
extern int32 DoConvertTunnelBridgeRail(TileIndex tile, uint totype, bool exec);
/** Convert one rail type to the other. You can convert normal rail to
* monorail/maglev easily or vice-versa.
* @param ex,ey end tile of rail conversion drag
* @param p1 start tile of drag
* @param p2 new railtype to convert to
*/
int32 CmdConvertRail(int ex, int ey, uint32 flags, uint32 p1, uint32 p2)
{
int32 ret, cost, money;
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
sx = TileX(p1) * TILE_SIZE;
sy = TileY(p1) * TILE_SIZE;
if (ex < sx) intswap(ex, sx);
if (ey < sy) intswap(ey, sy);
money = GetAvailableMoneyForCommand();
cost = 0;
for (x = sx; x <= ex; x += TILE_SIZE) {
for (y = sy; y <= ey; y += TILE_SIZE) {
TileIndex tile = TileVirtXY(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) ? CMD_ERROR : 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) {
Track track = TrackdirToTrack(DiagdirToDiagTrackdir(GetDepotDirection(tile, TRANSPORT_RAIL)));
DoDeleteDepot(tile);
SetSignalsOnBothDir(tile, track);
}
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 (m5 & RAIL_TYPE_SPECIAL)
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_TYPE_SIGNALS:
if (HasSignalOnTrack(tile, TRACK_DIAG1)) {
ret = DoCommandByTile(tile, TRACK_DIAG1, 0, flags, CMD_REMOVE_SIGNALS);
if (CmdFailed(ret)) return CMD_ERROR;
cost += ret;
}
if (HasSignalOnTrack(tile, TRACK_LOWER)) {
ret = DoCommandByTile(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_TYPE_NORMAL: {
uint i;
for (i = 0; m5 != 0; i++, m5 >>= 1) {
if (m5 & 1) {
ret = DoCommandByTile(tile, 0, i, flags, CMD_REMOVE_SINGLE_RAIL);
if (CmdFailed(ret)) return CMD_ERROR;
cost += ret;
}
}
return cost;
}
case RAIL_TYPE_DEPOT_WAYPOINT:
switch (m5 & RAIL_SUBTYPE_MASK) {
case RAIL_SUBTYPE_DEPOT:
return RemoveTrainDepot(tile, flags);
case RAIL_SUBTYPE_WAYPOINT:
return RemoveTrainWaypoint(tile, flags, false);
default:
return CMD_ERROR;
}
default:
return CMD_ERROR;
}
}
#include "table/track_land.h"
// used for presignals
static const SpriteID _signal_base_sprites[16] = {
0x4FB,
0x1323,
0x1333,
0x1343,
// semaphores
0x1353,
0x1363,
0x1373,
0x1383,
// mirrored versions
0x4FB,
0x1323,
0x1333,
0x1343,
// semaphores
0x1446,
0x1456,
0x1466,
0x1476,
};
// used to determine the side of the road for the signal
static const byte _signal_position[24] = {
/* original: left side position */
0x58, 0x1E, 0xE1, 0xB9, 0x01, 0xA3, 0x4B, 0xEE, 0x3B, 0xD4, 0x43, 0xBD,
/* patch: ride side position */
0x1E, 0xAC, 0x64, 0xE1, 0x4A, 0x10, 0xEE, 0xC5, 0xDB, 0x34, 0x4D, 0xB3
};
static void DrawSignalHelper(const TileInfo *ti, byte condition, uint32 image_and_pos)
{
bool otherside = _opt.road_side & _patches.signal_side;
uint v = _signal_position[(image_and_pos & 0xF) + (otherside ? 12 : 0)];
uint x = ti->x | (v&0xF);
uint y = ti->y | (v>>4);
uint sprite = _signal_base_sprites[(_m[ti->tile].m4 & 0x7) + (otherside ? 8 : 0)] + (image_and_pos>>4) + ((condition != 0) ? 1 : 0);
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 != 0) image = (ti->tileh & 2) ? 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 != 0) image = (ti->tileh & 2) ? 0x519 : 0x51B;
AddSortableSpriteToDraw(image | _drawtile_track_palette,
ti->x, ti->y + 15, 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 != 0) image = (ti->tileh & 2) ? 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 != 0) image = (ti->tileh & 2) ? 0x51A : 0x51C;
AddSortableSpriteToDraw(image | _drawtile_track_palette,
ti->x + 15, 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 & 1) z += 8;
AddSortableSpriteToDraw(0x517 | _drawtile_track_palette,
ti->x + 8, ti->y + 8, 1, 1, 4, z);
}
static void DrawTrackFence_NS_2(const TileInfo *ti)
{
int z = ti->z;
if (ti->tileh & 4) z += 8;
AddSortableSpriteToDraw(0x517 | _drawtile_track_palette,
ti->x + 8, ti->y + 8, 1, 1, 4, z);
}
static void DrawTrackFence_WE_1(const TileInfo *ti)
{
int z = ti->z;
if (ti->tileh & 8) z += 8;
AddSortableSpriteToDraw(0x518 | _drawtile_track_palette,
ti->x + 8, ti->y + 8, 1, 1, 4, z);
}
static void DrawTrackFence_WE_2(const TileInfo *ti)
{
int z = ti->z;
if (ti->tileh & 2) z += 8;
AddSortableSpriteToDraw(0x518 | _drawtile_track_palette,
ti->x + 8, ti->y + 8, 1, 1, 4, z);
}
static void DetTrackDrawProc_Null(const TileInfo *ti)
{
/* nothing should be here */
}
typedef void DetailedTrackProc(const TileInfo *ti);
static DetailedTrackProc* const _detailed_track_proc[] = {
DetTrackDrawProc_Null,
DetTrackDrawProc_Null,
DrawTrackFence_NW,
DrawTrackFence_SE,
DrawTrackFence_NW_SE,
DrawTrackFence_NE,
DrawTrackFence_SW,
DrawTrackFence_NE_SW,
DrawTrackFence_NS_1,
DrawTrackFence_NS_2,
DrawTrackFence_WE_1,
DrawTrackFence_WE_2,
DetTrackDrawProc_Null,
DetTrackDrawProc_Null,
DetTrackDrawProc_Null,
DetTrackDrawProc_Null,
};
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, bool earth, bool snow, bool flat)
{
const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
PalSpriteID image;
bool junction = false;
// Select the sprite to use.
(image = rti->base_sprites.track_y, track == TRACK_BIT_DIAG2) ||
(image++, track == TRACK_BIT_DIAG1) ||
(image++, track == TRACK_BIT_UPPER) ||
(image++, track == TRACK_BIT_LOWER) ||
(image++, track == TRACK_BIT_RIGHT) ||
(image++, track == TRACK_BIT_LEFT) ||
(image++, track == (TRACK_BIT_DIAG1 | TRACK_BIT_DIAG2)) ||
(image = rti->base_sprites.track_ns, track == (TRACK_BIT_UPPER | TRACK_BIT_LOWER)) ||
(image++, track == (TRACK_BIT_LEFT | TRACK_BIT_RIGHT)) ||
(junction = true, false) ||
(image = rti->base_sprites.ground, !(track & (TRACK_BIT_RIGHT | TRACK_BIT_UPPER | TRACK_BIT_DIAG1))) ||
(image++, !(track & (TRACK_BIT_LEFT | TRACK_BIT_LOWER | TRACK_BIT_DIAG1))) ||
(image++, !(track & (TRACK_BIT_LEFT | TRACK_BIT_UPPER | TRACK_BIT_DIAG2))) ||
(image++, !(track & (TRACK_BIT_RIGHT | TRACK_BIT_LOWER | TRACK_BIT_DIAG2))) ||
(image++, true);
if (ti->tileh != 0) {
int foundation;
if (flat) {
foundation = ti->tileh;
} else {
foundation = GetRailFoundation(ti->tileh, track);
}
if (foundation != 0)
DrawFoundation(ti, foundation);
// DrawFoundation() modifies ti.
// Default sloped sprites..
if (ti->tileh != 0)
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_DIAG1) DrawGroundSprite(rti->base_sprites.single_y);
if (track & TRACK_BIT_DIAG2) 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);
}
}
static void DrawTile_Track(TileInfo *ti)
{
byte m5;
const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
PalSpriteID image;
_drawtile_track_palette = SPRITE_PALETTE(PLAYER_SPRITE_COLOR(GetTileOwner(ti->tile)));
m5 = (byte)ti->map5;
if (!(m5 & RAIL_TYPE_SPECIAL)) {
bool earth = (_m[ti->tile].m2 & RAIL_MAP2LO_GROUND_MASK) == RAIL_GROUND_BROWN;
bool snow = (_m[ti->tile].m2 & RAIL_MAP2LO_GROUND_MASK) == RAIL_GROUND_ICE_DESERT;
DrawTrackBits(ti, m5 & TRACK_BIT_MASK, earth, snow, false);
if (_display_opt & DO_FULL_DETAIL) {
_detailed_track_proc[_m[ti->tile].m2 & RAIL_MAP2LO_GROUND_MASK](ti);
}
/* draw signals also? */
if (!(ti->map5 & RAIL_TYPE_SIGNALS))
return;
{
byte m23;
m23 = (_m[ti->tile].m3 >> 4) | (_m[ti->tile].m2 & 0xF0);
#define HAS_SIGNAL(x) (m23 & (byte)(0x1 << (x)))
#define ISON_SIGNAL(x) (m23 & (byte)(0x10 << (x)))
#define MAYBE_DRAW_SIGNAL(x,y,z) if (HAS_SIGNAL(x)) DrawSignalHelper(ti, ISON_SIGNAL(x), ((y-0x4FB) << 4)|(z))
if (!(m5 & TRACK_BIT_DIAG2)) {
if (!(m5 & TRACK_BIT_DIAG1)) {
if (m5 & TRACK_BIT_LEFT) {
MAYBE_DRAW_SIGNAL(2, 0x509, 0);
MAYBE_DRAW_SIGNAL(3, 0x507, 1);
}
if (m5 & TRACK_BIT_RIGHT) {
MAYBE_DRAW_SIGNAL(0, 0x509, 2);
MAYBE_DRAW_SIGNAL(1, 0x507, 3);
}
if (m5 & TRACK_BIT_UPPER) {
MAYBE_DRAW_SIGNAL(3, 0x505, 4);
MAYBE_DRAW_SIGNAL(2, 0x503, 5);
}
if (m5 & 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);
}
}
} else {
/* draw depots / waypoints */
const DrawTrackSeqStruct *drss;
byte type = m5 & 0x3F; // 0-3: depots, 4-5: waypoints
if (!(m5 & (RAIL_TILE_TYPE_MASK&~RAIL_TYPE_SPECIAL)))
/* XXX: There used to be "return;" here, but since I could not find out
* why this would ever occur, I put assert(0) here. Let's see if someone
* complains about it. If not, we'll remove this check. (Matthijs). */
assert(0);
if (ti->tileh != 0) DrawFoundation(ti, ti->tileh);
if (IsRailWaypoint(ti->tile) && HASBIT(_m[ti->tile].m3, 4)) {
// look for customization
byte stat_id = GetWaypointByTile(ti->tile)->stat_id;
const StationSpec *stat = GetCustomStation(STAT_CLASS_WAYP, stat_id);
if (stat != NULL) {
DrawTileSeqStruct const *seq;
// emulate station tile - open with building
const DrawTileSprites *cust = &stat->renderdata[2 + (m5 & 0x1)];
uint32 relocation = GetCustomStationRelocation(stat, ComposeWaypointStation(ti->tile), 0);
/* We don't touch the 0x8000 bit. In all this
* waypoint code, it is used to indicate that
* we should offset by railtype, but we always
* do that for custom ground sprites and never
* for station sprites. And in the drawing
* code, it is used to indicate that the sprite
* should be drawn in company colors, and it's
* up to the GRF file to decide that. */
image = cust->ground_sprite;
image += (image < _custom_sprites_base) ? rti->total_offset : GetRailType(ti->tile);
DrawGroundSprite(image);
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 = _track_depot_layout_table[type];
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 ((_m[ti->tile].m4 & RAIL_MAP2LO_GROUND_MASK) == RAIL_GROUND_ICE_DESERT &&
(_opt.landscape == LT_DESERT || type >= 4)) {
if (image != SPR_FLAT_GRASS_TILE) {
image += rti->snow_offset; // tile with tracks
} else {
image = SPR_FLAT_SNOWY_TILE; // flat ground
}
}
DrawGroundSprite(image);
for (; drss->image != 0; drss++) {
DrawSpecialBuilding(
drss->image, type < 4 ? 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_depot_layout_table[4];
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)
{
// the tile has signals?
if (IsTileType(tile, MP_RAILWAY)) {
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 |= (_m[tile].m4&1);
}
if (HasSignalOnTrackdir(tile, track) && (_m[tile].m4 & 2)) {
// this is an exit signal that points out from the segment
ssd->presignal_exits++;
if (GetSignalState(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 + (v->u.rail.track << 8))) 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 (IsTileType(tile, MP_TUNNELBRIDGE) && GB(_m[tile].m5, 4, 4) == 0) {
// It is a tunnel we're checking, we need to do some special stuff
// because VehicleFromPos will not find the vihicle otherwise
byte direction = GB(_m[tile].m5, 0, 2);
FindLengthOfTunnelResult flotr;
flotr = FindLengthOfTunnel(tile, direction);
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(flotr.tile, &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 != flotr.tile; 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 (_m[tile].m4 & 1) {
int ex = ssd->presignal_exits, exfree = ssd->presignal_exits_free;
// subtract for dual combo signals so they don't count themselves
if (_m[tile].m4 & 2 && HasSignalOnTrackdir(tile, ssd->bit[i])) {
ex--;
if (GetSignalState(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 (_m[tile].m4 & 2) {
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, byte direction)
{
SetSignalsData ssd;
int result = -1;
ssd.cur_stack = 0;
direction >>= 1;
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) result = ssd.stop;
// 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 (bool)result;
}
void SetSignalsOnBothDir(TileIndex tile, byte track)
{
static const byte _search_dir_1[6] = {1, 3, 1, 3, 5, 3};
static const byte _search_dir_2[6] = {5, 7, 7, 5, 7, 1};
UpdateSignalsOnSegment(tile, _search_dir_1[track]);
UpdateSignalsOnSegment(tile, _search_dir_2[track]);
}
static uint GetSlopeZ_Track(const TileInfo* ti)
{
uint z = ti->z;
int th = ti->tileh;
// check if it's a foundation
if (ti->tileh != 0) {
if ((ti->map5 & 0x80) == 0) {
uint f = GetRailFoundation(ti->tileh, ti->map5 & 0x3F);
if (f != 0) {
if (f < 15) {
// leveled foundation
return z + 8;
}
// inclined foundation
th = _inclined_tileh[f - 15];
}
} else if ((ti->map5 & 0xC0) == 0xC0) {
// depot or waypoint
return z + 8;
}
return GetPartialZ(ti->x & 0xF, ti->y & 0xF, th) + z;
}
return z;
}
static uint GetSlopeTileh_Track(const TileInfo *ti)
{
// check if it's a foundation
if (ti->tileh != 0) {
if ((ti->map5 & 0x80) == 0) {
uint f = GetRailFoundation(ti->tileh, ti->map5 & 0x3F);
if (f != 0) {
if (f < 15) {
// leveled foundation
return 0;
}
// inclined foundation
return _inclined_tileh[f - 15];
}
} else if ((ti->map5 & 0xC0) == 0xC0) {
// depot or waypoint
return 0;
}
}
return ti->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)
{
byte old_ground;
byte new_ground;
old_ground = _m[tile].m5 & RAIL_TYPE_SPECIAL ? GB(_m[tile].m4, 0, 4) : GB(_m[tile].m2, 0, 4);
switch (_opt.landscape) {
case LT_HILLY:
if (GetTileZ(tile) > _opt.snow_line) { /* convert into snow? */
new_ground = RAIL_GROUND_ICE_DESERT;
goto modify_me;
}
break;
case LT_DESERT:
if (GetMapExtraBits(tile) == 1) { /* convert into desert? */
new_ground = RAIL_GROUND_ICE_DESERT;
goto modify_me;
}
break;
}
// Don't continue tile loop for depots
if (_m[tile].m5 & RAIL_TYPE_SPECIAL) return;
new_ground = RAIL_GROUND_GREEN;
if (old_ground != RAIL_GROUND_BROWN) { /* wait until bottom is green */
/* determine direction of fence */
TrackBits rail = _m[tile].m5 & TRACK_BIT_MASK;
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_DIAG2 | TRACK_BIT_UPPER | TRACK_BIT_LEFT)) &&
(rail & TRACK_BIT_DIAG1)
)) {
TileIndex n = tile + TileDiffXY(0, -1);
if (!IsTileType(n, MP_RAILWAY) ||
!IsTileOwner(n, owner) ||
(_m[n].m5 & TRACK_BIT_MASK) == TRACK_BIT_UPPER ||
(_m[n].m5 & TRACK_BIT_MASK) == TRACK_BIT_LEFT) {
new_ground = RAIL_GROUND_FENCE_NW;
}
}
if (rail == (TRACK_BIT_UPPER | TRACK_BIT_LEFT) || (
!(rail & (TRACK_BIT_DIAG2 | TRACK_BIT_LOWER | TRACK_BIT_RIGHT)) &&
(rail & TRACK_BIT_DIAG1)
)) {
TileIndex n = tile + TileDiffXY(0, 1);
if (!IsTileType(n, MP_RAILWAY) ||
!IsTileOwner(n, owner) ||
(_m[n].m5 & TRACK_BIT_MASK) == TRACK_BIT_LOWER ||
(_m[n].m5 & TRACK_BIT_MASK) == 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_DIAG1 | TRACK_BIT_UPPER | TRACK_BIT_RIGHT)) &&
(rail & TRACK_BIT_DIAG2)
)) {
TileIndex n = tile + TileDiffXY(-1, 0);
if (!IsTileType(n, MP_RAILWAY) ||
!IsTileOwner(n, owner) ||
(_m[n].m5 & TRACK_BIT_MASK) == TRACK_BIT_UPPER ||
(_m[n].m5 & TRACK_BIT_MASK) == TRACK_BIT_RIGHT) {
new_ground = RAIL_GROUND_FENCE_NE;
}
}
if (rail == (TRACK_BIT_UPPER | TRACK_BIT_RIGHT) || (
!(rail & (TRACK_BIT_DIAG1 | TRACK_BIT_LOWER | TRACK_BIT_LEFT)) &&
(rail & TRACK_BIT_DIAG2)
)) {
TileIndex n = tile + TileDiffXY(1, 0);
if (!IsTileType(n, MP_RAILWAY) ||
!IsTileOwner(n, owner) ||
(_m[n].m5 & TRACK_BIT_MASK) == TRACK_BIT_LOWER ||
(_m[n].m5 & TRACK_BIT_MASK) == TRACK_BIT_LEFT) {
new_ground = (new_ground == RAIL_GROUND_FENCE_NE) ?
RAIL_GROUND_FENCE_NESW : RAIL_GROUND_FENCE_SW;
}
}
break;
}
}
}
modify_me:;
/* tile changed? */
if (old_ground != new_ground) {
if (_m[tile].m5 & RAIL_TYPE_SPECIAL) {
SB(_m[tile].m4, 0, 4, new_ground);
} else {
SB(_m[tile].m2, 0, 4, new_ground);
}
MarkTileDirtyByTile(tile);
}
}
static uint32 GetTileTrackStatus_Track(TileIndex tile, TransportType mode)
{
byte m5, a;
uint16 b;
uint32 ret;
if (mode != TRANSPORT_RAIL) return 0;
m5 = _m[tile].m5;
if (!(m5 & RAIL_TYPE_SPECIAL)) {
ret = (m5 | (m5 << 8)) & 0x3F3F;
if (!(m5 & RAIL_TYPE_SIGNALS)) {
if ( (ret & 0xFF) == 3)
/* Diagonal crossing? */
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;
}
} else if (m5 & 0x40) {
static const byte _train_spec_tracks[6] = {1,2,1,2,1,2};
m5 = _train_spec_tracks[m5 & 0x3F];
ret = (m5 << 8) + m5;
} else
return 0;
return ret;
}
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_TYPE_NORMAL:
td->str = STR_1021_RAILROAD_TRACK;
break;
case RAIL_TYPE_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[GB(_m[tile].m4, 0, 2)];
break;
}
case RAIL_TYPE_DEPOT_WAYPOINT:
default:
td->str = ((_m[tile].m5 & RAIL_SUBTYPE_MASK) == 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 {
DoCommandByTile(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 const byte _enter_directions[4] = {5, 7, 1, 3};
static const byte _leave_directions[4] = {1, 3, 5, 7};
static const byte _depot_track_mask[4] = {1, 2, 1, 2};
static uint32 VehicleEnter_Track(Vehicle *v, TileIndex tile, int x, int y)
{
byte fract_coord;
byte fract_coord_leave;
int 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 = GetDepotDirection(tile, TRANSPORT_RAIL);
/* 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 (_enter_directions[dir] == v->direction) {
/* enter the depot */
v->u.rail.track = 0x80,
v->vehstatus |= VS_HIDDEN; /* hide it */
v->direction ^= 4;
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 (_leave_directions[dir] == v->direction) {
/* leave the depot? */
if ((v = v->next) != NULL) {
v->vehstatus &= ~VS_HIDDEN;
v->u.rail.track = _depot_track_mask[dir];
assert(v->u.rail.track);
}
}
}
return 0;
}
void InitializeRail(void)
{
_last_built_train_depot_tile = 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 */
NULL, /* vehicle_leave_tile_proc */
GetSlopeTileh_Track, /* get_slope_tileh_proc */
};
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