#include "stdafx.h"
#include "ttd.h"
#include "vehicle.h"
#include "viewport.h"
#include "command.h"
#include "pathfind.h"
#include "town.h"
void ShowTrainDepotWindow(uint tile);
enum { /* These values are bitmasks for the map5 byte */
RAIL_TYPE_NORMAL = 0,
RAIL_TYPE_SIGNALS = 0x40,
RAIL_TYPE_SPECIAL = 0x80, // If this bit is set, then it's not a regular track.
RAIL_TYPE_DEPOT = 0xC0,
RAIL_TYPE_MASK = 0xC0,
RAIL_BIT_DIAG1 = 1, // 0
RAIL_BIT_DIAG2 = 2, // 1
RAIL_BIT_UPPER = 4, // 2
RAIL_BIT_LOWER = 8, // 3
RAIL_BIT_LEFT = 16, // 4
RAIL_BIT_RIGHT = 32, // 5
RAIL_BIT_MASK = 0x3F,
RAIL_DEPOT_TRACK_MASK = 1,
RAIL_DEPOT_DIR = 3,
RAIL_DEPOT_UNUSED_BITS = 0x3C,
RAIL_TYPE_CHECKPOINT = 0xC4,
RAIL_CHECKPOINT_TRACK_MASK = 1,
RAIL_CHECKPOINT_UNUSED_BITS = 0x3E,
};
#define IS_RAIL_DEPOT(x) (((x) & (RAIL_TYPE_DEPOT|RAIL_DEPOT_UNUSED_BITS)) == RAIL_TYPE_DEPOT)
#define IS_RAIL_CHECKPOINT(x) (((x) & (RAIL_TYPE_CHECKPOINT|RAIL_CHECKPOINT_UNUSED_BITS)) == RAIL_TYPE_CHECKPOINT)
/* 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(byte map5, byte trackbits, byte flags)
{
_error_message = STR_1001_IMPOSSIBLE_TRACK_COMBINATION;
if ((map5&RAIL_TYPE_MASK) == RAIL_TYPE_SIGNALS) {
if (map5 & trackbits) {
_error_message = STR_1007_ALREADY_BUILT;
return false;
}
map5 |= trackbits;
return (map5 == (RAIL_TYPE_SIGNALS|RAIL_BIT_UPPER|RAIL_BIT_LOWER) || map5 == (RAIL_TYPE_SIGNALS|RAIL_BIT_LEFT|RAIL_BIT_RIGHT));
} else if ((map5&RAIL_TYPE_MASK) == RAIL_TYPE_NORMAL) {
_error_message = STR_1007_ALREADY_BUILT;
if (map5 & trackbits)
return false;
// Computer players are not allowed to intersect pieces of rail.
if (!(flags&DC_NO_RAIL_OVERLAP))
return true;
map5 |= trackbits;
return (map5 == (RAIL_BIT_UPPER|RAIL_BIT_LOWER) || map5 == (RAIL_BIT_LEFT|RAIL_BIT_RIGHT));
} else {
return false;
}
}
static const byte _valid_tileh_slopes[4][15] = {
// set of normal ones
{
RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,
RAIL_BIT_RIGHT,
RAIL_BIT_UPPER,
RAIL_BIT_DIAG1,
RAIL_BIT_LEFT,
0,
RAIL_BIT_DIAG2,
RAIL_BIT_LOWER,
RAIL_BIT_LOWER,
RAIL_BIT_DIAG2,
0,
RAIL_BIT_LEFT,
RAIL_BIT_DIAG1,
RAIL_BIT_UPPER,
RAIL_BIT_RIGHT,
},
// allowed rail for an evenly raised platform
{
0,
RAIL_BIT_LEFT,
RAIL_BIT_LOWER,
RAIL_BIT_DIAG2 | RAIL_BIT_LOWER | RAIL_BIT_LEFT,
RAIL_BIT_RIGHT,
RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,
RAIL_BIT_DIAG1 | RAIL_BIT_LOWER | RAIL_BIT_RIGHT,
RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,
RAIL_BIT_UPPER,
RAIL_BIT_DIAG1 | RAIL_BIT_UPPER | RAIL_BIT_LEFT,
RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,
RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,
RAIL_BIT_DIAG2 | RAIL_BIT_UPPER | RAIL_BIT_RIGHT,
RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,
RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,
},
// allowed rail on coast tile
{
0,
RAIL_BIT_LEFT,
RAIL_BIT_LOWER,
RAIL_BIT_DIAG2|RAIL_BIT_LEFT|RAIL_BIT_LOWER,
RAIL_BIT_RIGHT,
RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,
RAIL_BIT_DIAG1|RAIL_BIT_RIGHT|RAIL_BIT_LOWER,
RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,
RAIL_BIT_UPPER,
RAIL_BIT_DIAG1|RAIL_BIT_LEFT|RAIL_BIT_UPPER,
RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,
RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,
RAIL_BIT_DIAG2|RAIL_BIT_RIGHT|RAIL_BIT_UPPER,
RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT,
RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_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
}
};
static 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 == RAIL_BIT_DIAG1 || (i++, bits == RAIL_BIT_DIAG2)))
return i + 15;
return 0;
}
//
static uint32 CheckRailSlope(int tileh, uint rail_bits, uint existing, uint tile)
{
// never allow building on top of steep tiles
if (!(tileh & 0x10)) {
rail_bits |= existing;
// don't allow building on the lower side of a coast
if (IS_TILETYPE(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 == RAIL_BIT_DIAG1 || rail_bits == RAIL_BIT_DIAG2) && (tileh == 1 || tileh == 2 || tileh == 4 || tileh == 8))) { // partly up
return existing ? 0 : _price.terraform;
}
}
return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
}
/* Build a single track.
* p1 - railroad type normal/maglev
* p2 - tile direction
*/
int32 CmdBuildSingleRail(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
TileInfo ti;
int32 ret, cost = 0;
byte rail_bit = 1 << p2;
byte rail_type = (byte)(p1 & 0xF);
uint tile;
byte existing = 0;
bool need_clear = false;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
_error_message = STR_1007_ALREADY_BUILT;
FindLandscapeHeight(&ti, x, y);
tile = ti.tile;
// allow building rail under bridge
if (ti.type != MP_TUNNELBRIDGE && !EnsureNoVehicle(tile))
return CMD_ERROR;
if (ti.type == MP_TUNNELBRIDGE) {
/* BUILD ON BRIDGE CODE */
if (!EnsureNoVehicleZ(tile, GET_TILEHEIGHT(tile)))
return CMD_ERROR;
if ((ti.map5 & 0xF8) == 0xC0) {
if (ti.tileh & 0x10 || rail_bit != (byte)((ti.map5 & 1) ? 1 : 2)) goto need_clear;
if (!(flags & DC_EXEC))
return _price.build_rail;
_map5[tile] = (ti.map5 & 0xC7) | 0x20;
goto set_ownership;
} else if ((ti.map5 & 0xF8) == 0xE0) {
if ((_map3_lo[tile] & 0xF) != (int)p1) goto need_clear;
if (rail_bit != (byte)((ti.map5 & 1) ? 1 : 2)) goto need_clear;
return CMD_ERROR;
} else
goto need_clear;
} else if (ti.type == MP_STREET) {
byte m5;
/* BUILD ON STREET CODE */
if (ti.tileh & 0x10) // very steep tile
return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
if (!_valid_tileh_slopes[3][ti.tileh]) // prevent certain slopes
return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
if (!(ti.map5 & 0xF0)) {
if ((ti.map5 & 0x0F) == 0xA) {
if (rail_bit != 2) goto need_clear;
m5 = 0x10;
} else if ((ti.map5 & 0x0F) == 0x5) {
if (rail_bit != 1) goto need_clear;
m5 = 0x18;
} else
goto need_clear;
if (!(flags & DC_EXEC))
return _price.build_rail;
ModifyTile(tile,
MP_SETTYPE(MP_STREET) |
MP_MAP3LO | MP_MAP3HI | MP_MAPOWNER_CURRENT | MP_MAP5,
_map_owner[tile], /* map3_lo */
p1, /* map3_hi */
m5 /* map5 */
);
goto fix_signals;
} else if (!(ti.map5 & 0xE0)) {
if (rail_bit != (byte)((ti.map5 & 8) ? 1 : 2)) goto need_clear;
return CMD_ERROR;
} else
goto need_clear;
} else if (ti.type == MP_RAILWAY) {
/* BUILD ON RAILWAY CODE */
if (_map_owner[tile] != _current_player || (byte)(_map3_lo[tile]&0xF) != rail_type)
goto need_clear;
if (!CheckTrackCombination(ti.map5, rail_bit, (byte)flags))
return CMD_ERROR;
existing = ti.map5 & 0x3F;
} else {
/* DEFAULT BUILD ON CODE */
need_clear:;
/* isnot_railway */
if (!(flags & DC_EXEC)) {
ret = DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
if (ret == CMD_ERROR) return CMD_ERROR;
cost += ret;
}
need_clear = true;
}
ret = CheckRailSlope(ti.tileh, rail_bit, existing, tile);
if (ret & 0x80000000)
return ret;
cost += ret;
// the AI is not allowed to used foundationed tiles.
if (ret && (_is_ai_player || !_patches.build_on_slopes))
return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
if (flags & DC_EXEC && need_clear) {
ret = DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
if (ret == CMD_ERROR) return CMD_ERROR;
cost += ret;
}
if (flags & DC_EXEC) {
_map_type_and_height[tile] &= 0xF;
_map_type_and_height[tile] |= MP_RAILWAY << 4;
_map5[tile] |= rail_bit;
_map2[tile] &= ~RAIL_MAP2LO_GROUND_MASK;
// In case it's a tile without signals, clear the signal bits. Why?
if ((_map5[tile] & RAIL_TYPE_MASK) != RAIL_TYPE_SIGNALS)
_map2[tile] &= ~0xF0;
set_ownership:
_map_owner[tile] = _current_player;
_map3_lo[tile] &= ~0xF;
_map3_lo[tile] |= rail_type;
MarkTileDirtyByTile(tile);
fix_signals:
SetSignalsOnBothDir(tile, (byte)p2);
}
return cost + _price.build_rail;
}
static const byte _signals_table[] = {
0x40, 0x40, 0x40, 0x10, 0x80, 0x20, 0, 0, // direction 1
0x80, 0x80, 0x80, 0x20, 0x40, 0x10, 0, 0 // direction 2
};
static const byte _signals_table_other[] = {
0x80, 0x80, 0x80, 0x20, 0x40, 0x10, 0, 0, // direction 1
0x40, 0x40, 0x40, 0x10, 0x80, 0x20, 0, 0 // direction 2
};
static const byte _signals_table_both[] = {
0xC0, 0xC0, 0xC0, 0x30, 0xC0, 0x30, 0, 0, // both directions combined
0xC0, 0xC0, 0xC0, 0x30, 0xC0, 0x30, 0, 0
};
/* Remove a single track.
* p1 - unused
* p2 - tile direction
*/
int32 CmdRemoveSingleRail(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
TileInfo ti;
byte rail_bit = 1 << p2;
byte m5;
uint tile;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
FindLandscapeHeight(&ti, x, y);
tile = ti.tile;
if (!((1<<ti.type) & ((1<<MP_TUNNELBRIDGE)|(1<<MP_STREET)|(1<<MP_RAILWAY))))
return CMD_ERROR;
if (_current_player != OWNER_WATER && !CheckTileOwnership(tile))
return CMD_ERROR;
// allow building rail under bridge
if (ti.type != MP_TUNNELBRIDGE && !EnsureNoVehicle(tile))
return CMD_ERROR;
if (ti.type == MP_TUNNELBRIDGE) {
if (!EnsureNoVehicleZ(tile, GET_TILEHEIGHT(tile)))
return CMD_ERROR;
if ((ti.map5 & 0xF8) != 0xE0)
return CMD_ERROR;
if ( ((ti.map5 & 1) ? 1 : 2) != rail_bit )
return CMD_ERROR;
if (!(flags & DC_EXEC))
return _price.remove_rail;
_map_owner[tile] = OWNER_NONE;
_map5[tile] = ti.map5 & 0xC7;
} else if (ti.type == MP_STREET) {
if (!(ti.map5 & 0xF0))
return CMD_ERROR;
if (ti.map5 & 0xE0)
return CMD_ERROR;
if (ti.map5 & 8) {
m5 = 5;
if (rail_bit != 1)
return CMD_ERROR;
} else {
m5 = 10;
if (rail_bit != 2)
return CMD_ERROR;
}
if (!(flags & DC_EXEC))
return _price.remove_rail;
_map5[tile] = m5;
_map_owner[tile] = _map3_lo[tile];
_map2[tile] = 0;
} else {
assert(ti.type == MP_RAILWAY);
if (ti.map5 & RAIL_TYPE_SPECIAL)
return CMD_ERROR;
if (!(ti.map5 & rail_bit))
return CMD_ERROR;
// don't allow remove if there are signals on the track
if (ti.map5 & RAIL_TYPE_SIGNALS) {
if (_map3_lo[tile] & _signals_table_both[p2])
return CMD_ERROR;
}
if (!(flags & DC_EXEC))
return _price.remove_rail;
if ( (_map5[tile] ^= rail_bit) == 0) {
DoClearSquare(tile);
goto skip_mark_dirty;
}
}
/* mark_dirty */
MarkTileDirtyByTile(tile);
skip_mark_dirty:;
SetSignalsOnBothDir(tile, (byte)p2);
return _price.remove_rail;
}
static const struct {
int8 xinc[16];
int8 yinc[16];
byte initial[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,
},{
5, 1, 0,4, // normal
2, 1, 8,3, // x > sx
10, 9, 0,11, // y > sy
13, 9, 8,12, // x > sx && y > sy
}};
/* Build either NE or NW sequence of tracks.
* p1 0:15 - start pt X
* p1 16:31 - start pt y
*
* p2 0:3 - rail type
* p2 4:7 - rail direction
*/
int32 CmdBuildRailroadTrack(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
int sx, sy;
int32 ret, total_cost = 0;
int railbit;
if (flags & DC_EXEC)
SndPlayTileFx(0x1E, TILE_FROM_XY(x,y));
/* unpack start point */
sx = (p1 & 0xFFFF) & ~0xF;
sy = (p1 >> 16) & ~0xF;
railbit = _railbit.initial[(p2 >> 4) + (x > sx ? 4 : 0) + (y > sy ? 8 : 0)];
for(;;) {
ret = DoCommand(x, y, p2&0xF, railbit&7, flags, CMD_BUILD_SINGLE_RAIL);
if (ret == CMD_ERROR) {
if (_error_message != STR_1007_ALREADY_BUILT)
break;
} else
total_cost += ret;
if (x == sx && y == sy)
break;
x += _railbit.xinc[railbit];
y += _railbit.yinc[railbit];
// toggle railbit for the diagonal tiles
if (railbit & 0x6) railbit ^= 1;
}
if (total_cost == 0)
return CMD_ERROR;
return total_cost;
}
/* Remove either NE or NW sequence of tracks.
* p1 0:15 - start pt X
* p1 16:31 - start pt y
*
* p2 0:3 - rail type
* p2 4:7 - rail direction
*/
int32 CmdRemoveRailroadTrack(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
int sx, sy;
int32 ret, total_cost = 0;
int railbit;
if (flags & DC_EXEC)
SndPlayTileFx(0x1E, TILE_FROM_XY(x,y));
/* unpack start point */
sx = (p1 & 0xFFFF) & ~0xF;
sy = (p1 >> 16) & ~0xF;
railbit = _railbit.initial[(p2 >> 4) + (x > sx ? 4 : 0) + (y > sy ? 8 : 0)];
for(;;) {
ret = DoCommand(x, y, p2&0xF, railbit&7, flags, CMD_REMOVE_SINGLE_RAIL);
if (ret != CMD_ERROR) total_cost += ret;
if (x == sx && y == sy)
break;
x += _railbit.xinc[railbit];
y += _railbit.yinc[railbit];
// toggle railbit for the diagonal tiles
if (railbit & 0x6) railbit ^= 1;
}
if (total_cost == 0)
return CMD_ERROR;
return total_cost;
}
/* Build a train depot
* p1 = rail type
* p2 = depot direction
*/
int32 CmdBuildTrainDepot(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
uint tile = TILE_FROM_XY(x,y);
int32 cost, ret;
Depot *dep;
uint tileh;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
if (!EnsureNoVehicle(tile)) return CMD_ERROR;
tileh = GetTileSlope(tile, NULL);
if (tileh != 0) {
if (_is_ai_player || !_patches.build_on_slopes || (tileh & 0x10 || !((0x4C >> p2) & tileh) ))
return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
}
ret = DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
if (ret == CMD_ERROR) return CMD_ERROR;
cost = ret;
dep = AllocateDepot();
if (dep == NULL)
return CMD_ERROR;
if (flags & DC_EXEC) {
if (_current_player == _local_player)
_last_built_train_depot_tile = (TileIndex)tile;
ModifyTile(tile,
MP_SETTYPE(MP_RAILWAY) |
MP_MAP3LO | MP_MAPOWNER_CURRENT | MP_MAP5,
p1, /* map3_lo */
p2 | RAIL_TYPE_DEPOT /* map5 */
);
dep->xy = tile;
dep->town_index = ClosestTownFromTile(tile, (uint)-1)->index;
SetSignalsOnBothDir(tile, (p2&1) ? 2 : 1);
}
return cost + _price.build_train_depot;
}
static void MakeDefaultCheckpointName(Checkpoint *cp)
{
int townidx = ClosestTownFromTile(cp->xy, (uint)-1)->index;
Checkpoint *cc;
bool used_checkpoint[64];
int i;
memset(used_checkpoint, 0, sizeof(used_checkpoint));
// find an unused checkpoint number belonging to this town
for(cc = _checkpoints; cc != endof(_checkpoints); cc++) {
if (cc->xy && cc->town_or_string & 0xC000 && (cc->town_or_string & 0xFF) == townidx)
used_checkpoint[(cc->town_or_string >> 8) & 0x3F] = true;
}
for(i=0; used_checkpoint[i] && i!=lengthof(used_checkpoint)-1; i++) {}
cp->town_or_string = 0xC000 + (i << 8) + townidx;
}
// find a deleted checkpoint close to a tile.
static Checkpoint *FindDeletedCheckpointCloseTo(uint tile)
{
Checkpoint *cp,*best = NULL;
uint thres = 8, cur_dist;
for(cp = _checkpoints; cp != endof(_checkpoints); cp++) {
if (cp->deleted && cp->xy) {
cur_dist = GetTileDist(tile, cp->xy);
if (cur_dist < thres) {
thres = cur_dist;
best = cp;
}
}
}
return best;
}
/* Convert existing rail to checkpoint */
int32 CmdBuildTrainCheckpoint(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
uint tile = TILE_FROM_XY(x,y);
Checkpoint *cp;
uint tileh;
uint dir;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
if (!IS_TILETYPE(tile, MP_RAILWAY) || ((dir=0, _map5[tile] != 1) && (dir=1, _map5[tile] != 2)))
return_cmd_error(STR_1005_NO_SUITABLE_RAILROAD_TRACK);
if (!CheckTileOwnership(tile))
return CMD_ERROR;
if (!EnsureNoVehicle(tile)) return CMD_ERROR;
tileh = GetTileSlope(tile, NULL);
if (tileh != 0) {
if (!_patches.build_on_slopes || tileh & 0x10 || !(tileh & (0x3 << dir)) || !(tileh & ~(0x3 << dir)))
return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
}
// check if there is an already existing, deleted, checkpoint close to us that we can reuse.
cp = FindDeletedCheckpointCloseTo(tile);
if (cp == NULL) {
cp = AllocateCheckpoint();
if (cp == NULL) return CMD_ERROR;
cp->town_or_string = 0;
}
if (flags & DC_EXEC) {
ModifyTile(tile, MP_MAP5, RAIL_TYPE_CHECKPOINT | dir);
cp->deleted = 0;
cp->xy = tile;
if (cp->town_or_string == 0) MakeDefaultCheckpointName(cp); else RedrawCheckpointSign(cp);
UpdateCheckpointSign(cp);
RedrawCheckpointSign(cp);
SetSignalsOnBothDir(tile, dir ? 2 : 1);
}
return _price.build_train_depot;
}
static void DoDeleteCheckpoint(Checkpoint *cp)
{
cp->xy = 0;
DeleteCommandFromVehicleSchedule(((cp-_checkpoints) << 8) + OT_GOTO_CHECKPOINT);
if (~cp->town_or_string & 0xC000) DeleteName(cp->town_or_string);
RedrawCheckpointSign(cp);
}
// delete checkpoints after a while
void CheckpointsDailyLoop()
{
Checkpoint *cp;
for(cp = _checkpoints; cp != endof(_checkpoints); cp++) {
if (cp->deleted && !--cp->deleted) {
DoDeleteCheckpoint(cp);
}
}
}
static int32 RemoveTrainCheckpoint(uint tile, uint32 flags, bool justremove)
{
Checkpoint *cp;
// make sure it's a checkpoint
if (!IS_TILETYPE(tile, MP_RAILWAY) || !IS_RAIL_CHECKPOINT(_map5[tile]))
return CMD_ERROR;
if (!CheckTileOwnership(tile) && !(_current_player==17))
return CMD_ERROR;
if (!EnsureNoVehicle(tile))
return CMD_ERROR;
if (flags & DC_EXEC) {
int direction = _map5[tile] & RAIL_CHECKPOINT_TRACK_MASK;
// mark the checkpoint deleted
for(cp=_checkpoints; cp->xy != (TileIndex)tile; cp++) {}
cp->deleted = 30; // let it live for this many days before we do the actual deletion.
RedrawCheckpointSign(cp);
if (justremove) {
ModifyTile(tile, MP_MAP5, 1<<direction);
} else {
DoClearSquare(tile);
SetSignalsOnBothDir(tile, direction);
}
}
return _price.remove_train_depot;
}
int32 CmdRemoveTrainCheckpoint(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
uint tile = TILE_FROM_XY(x,y);
return RemoveTrainCheckpoint(tile, flags, true);
}
// p1 = id of checkpoint
int32 CmdRenameCheckpoint(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
Checkpoint *cp;
StringID str;
if (_decode_parameters[0] != 0) {
str = AllocateName((byte*)_decode_parameters, 0);
if (str == 0) return CMD_ERROR;
if (flags & DC_EXEC) {
cp = &_checkpoints[p1];
if (~cp->town_or_string & 0xC000) DeleteName(cp->town_or_string);
cp->town_or_string = str;
UpdateCheckpointSign(cp);
MarkWholeScreenDirty();
} else {
DeleteName(str);
}
} else {
if (flags & DC_EXEC) {
cp = &_checkpoints[p1];
if (~cp->town_or_string & 0xC000) DeleteName(cp->town_or_string);
MakeDefaultCheckpointName(cp);
UpdateCheckpointSign(cp);
MarkWholeScreenDirty();
}
}
return 0;
}
/* build signals, p1 = track */
int32 CmdBuildSignals(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
uint tile;
byte m5;
int32 cost;
int track = p1 & 0x7;
assert(track >= 0 && track < 6);
assert(p2 == 0);
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
tile = TILE_FROM_XY(x,y);
if (!EnsureNoVehicle(tile))
return CMD_ERROR;
_error_message = STR_1005_NO_SUITABLE_RAILROAD_TRACK;
// must be railway, and not a depot, and it must have a track in the suggested position.
if (!IS_TILETYPE(tile, MP_RAILWAY) || (m5=_map5[tile], m5&0x80) || !HASBIT(m5, track))
return CMD_ERROR;
// check rail combination
{
byte m = m5 & RAIL_BIT_MASK;
if (m != RAIL_BIT_DIAG1 && m != RAIL_BIT_DIAG2 && m != RAIL_BIT_UPPER && m != RAIL_BIT_LOWER &&
m != RAIL_BIT_LEFT && m != RAIL_BIT_RIGHT && m != (RAIL_BIT_UPPER|RAIL_BIT_LOWER) && m != (RAIL_BIT_LEFT|RAIL_BIT_RIGHT))
return CMD_ERROR;
}
// check ownership
if (!CheckTileOwnership(tile))
return CMD_ERROR;
// If it had signals previously it's no cost to build.
cost = 0;
if (!(m5 & RAIL_TYPE_SIGNALS)) {
cost = _price.build_signals;
}
if (flags & DC_EXEC) {
if (!(m5 & RAIL_TYPE_SIGNALS)) {
_map5[tile] |= RAIL_TYPE_SIGNALS; // change into signals
_map2[tile] |= 0xF0; // all signals are on
_map3_lo[tile] &= ~0xF0; // no signals built by default
_map3_hi[tile] = (p1 & 8) ? 4 : 0;// initial presignal state, semaphores depend on ctrl key
goto ignore_presig;
}
if (!(p1 & 8)) {
byte a,b,c,d;
ignore_presig:
a = _signals_table[track]; // signal for this track in one direction
b = _signals_table[track + 8]; // signal for this track in the other direction
c = a | b;
d = _map3_lo[tile] & c; // mask of built signals. it only affects &0xF0
// Alternate between a|b, b, a
if ( d != 0 && d != a) {
c = (d==c)?b:a;
}
_map3_lo[tile] = (_map3_lo[tile]&~(a|b)) | c;
} else {
// toggle between the signal types. Using low 2 bits of map3_hi.
_map3_hi[tile] = (_map3_hi[tile] & ~3) | ((_map3_hi[tile] + 1) & 3);
}
MarkTileDirtyByTile(tile);
SetSignalsOnBothDir(tile, track);
}
return cost;
}
/* Remove signals
* p1 = unused
* p2 = unused
*/
int32 CmdRemoveSignals(int x, int y, uint32 flags, uint32 p1, uint32 p2)
{
TileInfo ti;
uint tile;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
FindLandscapeHeight(&ti, x, y);
tile = ti.tile;
/* No vehicle behind. */
if (!EnsureNoVehicle(tile))
return CMD_ERROR;
/* Signals can only exist on railways */
if (ti.type != MP_RAILWAY)
return CMD_ERROR;
/* Map5 mode is 0x40 when there's signals */
if ((ti.map5 & RAIL_TYPE_MASK) != RAIL_TYPE_SIGNALS)
return CMD_ERROR;
/* Who owns the tile? */
if (_current_player != OWNER_WATER && !CheckTileOwnership(tile))
return CMD_ERROR;
/* Do it? */
if (flags & DC_EXEC) {
byte bits = _map5[tile];
_map5[tile] &= ~RAIL_TYPE_SIGNALS;
_map2[tile] &= ~0xF0;
/* TTDBUG: this code contains a bug, if a tile contains 2 signals
* on separate tracks, it won't work properly for the 2nd track */
SetSignalsOnBothDir(tile, FIND_FIRST_BIT(bits & RAIL_BIT_MASK));
MarkTileDirtyByTile(tile);
}
return _price.remove_signals;
}
typedef int32 DoConvertRailProc(uint tile, uint totype, bool exec);
static int32 DoConvertRail(uint tile, uint totype, bool exec)
{
if (!CheckTileOwnership(tile) || !EnsureNoVehicle(tile))
return CMD_ERROR;
// tile is already of requested type?
if ( (uint)(_map3_lo[tile] & 0xF) == totype)
return CMD_ERROR;
// change type.
if (exec) {
_map3_lo[tile] = (_map3_lo[tile] & 0xF0) + totype;
MarkTileDirtyByTile(tile);
}
return _price.build_rail >> 1;
}
extern int32 DoConvertStationRail(uint tile, uint totype, bool exec);
extern int32 DoConvertStreetRail(uint tile, uint totype, bool exec);
extern int32 DoConvertTunnelBridgeRail(uint tile, uint totype, bool exec);
// p1 = start tile
// p2 = new railtype
int32 CmdConvertRail(int ex, int ey, uint32 flags, uint32 p1, uint32 p2)
{
int32 ret, cost, money;
int sx,sy,x,y;
// make sure sx,sy are smaller than ex,ey
sx = GET_TILE_X(p1)*16;
sy = GET_TILE_Y(p1)*16;
if (ex < sx) intswap(ex, sx);
if (ey < sy) intswap(ey, sy);
money = GetAvailableMoneyForCommand();
ret = false;
cost = 0;
for(x=sx; x<=ex; x+=16) {
for(y=sy; y<=ey; y+=16) {
uint tile = TILE_FROM_XY(x,y);
DoConvertRailProc *p;
if (IS_TILETYPE(tile, MP_RAILWAY)) p = DoConvertRail;
else if (IS_TILETYPE(tile, MP_STATION)) p = DoConvertStationRail;
else if (IS_TILETYPE(tile, MP_STREET)) p = DoConvertStreetRail;
else if (IS_TILETYPE(tile, MP_TUNNELBRIDGE)) p = DoConvertTunnelBridgeRail;
else continue;
ret = p(tile, p2, false);
if (ret == CMD_ERROR) continue;
cost += ret;
if (flags & DC_EXEC) {
if ( (money -= ret) < 0) { _additional_cash_required = ret; return cost - ret; }
p(tile, p2, true);
}
}
}
if (cost == 0) cost = CMD_ERROR;
return cost;
}
static int32 RemoveTrainDepot(uint tile, uint32 flags)
{
if (!CheckTileOwnership(tile) && !(_current_player==17))
return CMD_ERROR;
if (!EnsureNoVehicle(tile))
return CMD_ERROR;
if (flags & DC_EXEC) {
int track = _map5[tile] & RAIL_DEPOT_TRACK_MASK;
DoDeleteDepot(tile);
SetSignalsOnBothDir(tile, track);
}
return _price.remove_train_depot;
}
static int32 ClearTile_Track(uint tile, byte flags) {
int32 cost,ret;
int i;
byte m5;
m5 = _map5[tile];
if (flags & DC_AUTO) {
if (m5 & RAIL_TYPE_SPECIAL)
return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED);
if (_map_owner[tile] != _current_player)
return_cmd_error(STR_1024_AREA_IS_OWNED_BY_ANOTHER);
return_cmd_error(STR_1008_MUST_REMOVE_RAILROAD_TRACK);
}
cost = 0;
if ( (m5 & RAIL_TYPE_MASK) == RAIL_TYPE_NORMAL) {
regular_track:;
for(i=0; m5; i++, m5>>=1) {
if (m5 & 1) {
ret = DoCommandByTile(tile, 0, i, flags, CMD_REMOVE_SINGLE_RAIL);
if (ret == CMD_ERROR)
return CMD_ERROR;
cost += ret;
}
}
return cost;
} else if ((m5 & RAIL_TYPE_MASK)==RAIL_TYPE_SIGNALS) {
cost = DoCommandByTile(tile, 0, 0, flags, CMD_REMOVE_SIGNALS);
if (cost == CMD_ERROR)
return CMD_ERROR;
m5 &= RAIL_BIT_MASK;
if (flags & DC_EXEC)
goto regular_track;
return cost + _price.remove_rail;
} else if ( (m5 & (RAIL_TYPE_MASK|RAIL_DEPOT_UNUSED_BITS)) == RAIL_TYPE_DEPOT) {
return RemoveTrainDepot(tile, flags);
} else if ( (m5 & (RAIL_TYPE_MASK|RAIL_CHECKPOINT_UNUSED_BITS)) == RAIL_TYPE_CHECKPOINT) {
return RemoveTrainCheckpoint(tile, flags, false);
} else
return CMD_ERROR;
}
typedef struct DrawTrackSeqStruct {
uint16 image;
byte subcoord_x;
byte subcoord_y;
byte width;
byte height;
} DrawTrackSeqStruct;
#include "table/track_land.h"
// used for presignals
static const SpriteID _signal_base_sprites[16] = {
0x4FB,
0x1323,
0x1333,
0x1343,
// use semaphores instead of signals?
0x1353,
0x1363,
0x1373,
0x1383,
// mirrored versions
0x4FB,
0x1323,
0x1333,
0x1343,
0x13C6,
0x13D6,
0x13E6,
0x13F6,
};
// 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(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[(_map3_hi[ti->tile] & 7) + (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(TileInfo *ti)
{
uint32 image = 0x515;
if (ti->tileh != 0) {
image = 0x519;
if (!(ti->tileh & 2)) {
image = 0x51B;
}
}
AddSortableSpriteToDraw(image | _drawtile_track_palette,
ti->x, ti->y+1, 16, 1, 4, ti->z);
}
static void DrawTrackFence_SE(TileInfo *ti)
{
uint32 image = 0x515;
if (ti->tileh != 0) {
image = 0x519;
if (!(ti->tileh & 2)) {
image = 0x51B;
}
}
AddSortableSpriteToDraw(image | _drawtile_track_palette,
ti->x, ti->y+15, 16, 1, 4, ti->z);
}
static void DrawTrackFence_NW_SE(TileInfo *ti)
{
DrawTrackFence_NW(ti);
DrawTrackFence_SE(ti);
}
static void DrawTrackFence_NE(TileInfo *ti)
{
uint32 image = 0x516;
if (ti->tileh != 0) {
image = 0x51A;
if (!(ti->tileh & 2)) {
image = 0x51C;
}
}
AddSortableSpriteToDraw(image | _drawtile_track_palette,
ti->x+1, ti->y, 1, 16, 4, ti->z);
}
static void DrawTrackFence_SW(TileInfo *ti)
{
uint32 image = 0x516;
if (ti->tileh != 0) {
image = 0x51A;
if (!(ti->tileh & 2)) {
image = 0x51C;
}
}
AddSortableSpriteToDraw(image | _drawtile_track_palette,
ti->x+15, ti->y, 1, 16, 4, ti->z);
}
static void DrawTrackFence_NE_SW(TileInfo *ti)
{
DrawTrackFence_NE(ti);
DrawTrackFence_SW(ti);
}
static void DrawTrackFence_NS_1(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(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(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(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(TileInfo *ti)
{
/* nothing should be here */
}
typedef void DetailedTrackProc(TileInfo *ti);
DetailedTrackProc * const _detailed_track_proc[16] = {
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 DrawTile_Track(TileInfo *ti)
{
uint32 tracktype_offs, image;
byte m5;
_drawtile_track_palette = SPRITE_PALETTE(PLAYER_SPRITE_COLOR(_map_owner[ti->tile]));
tracktype_offs = (_map3_lo[ti->tile] & 0xF) * TRACKTYPE_SPRITE_PITCH;
m5 = (byte)ti->map5;
if (!(m5 & RAIL_TYPE_SPECIAL)) {
bool special;
m5 &= RAIL_BIT_MASK;
special = false;
// select the sprite to use based on the map5 byte.
(image = 0x3F3, m5 == RAIL_BIT_DIAG2) ||
(image++, m5 == RAIL_BIT_DIAG1) ||
(image++, m5 == RAIL_BIT_UPPER) ||
(image++, m5 == RAIL_BIT_LOWER) ||
(image++, m5 == RAIL_BIT_RIGHT) ||
(image++, m5 == RAIL_BIT_LEFT) ||
(image++, m5 == (RAIL_BIT_DIAG1|RAIL_BIT_DIAG2)) ||
(image = 0x40B, m5 == (RAIL_BIT_UPPER|RAIL_BIT_LOWER)) ||
(image++, m5 == (RAIL_BIT_LEFT|RAIL_BIT_RIGHT)) ||
(special=true, false) ||
(image = 0x3FA, !(m5 & (RAIL_BIT_RIGHT|RAIL_BIT_UPPER|RAIL_BIT_DIAG1))) ||
(image++, !(m5 & (RAIL_BIT_LEFT|RAIL_BIT_LOWER|RAIL_BIT_DIAG1))) ||
(image++, !(m5 & (RAIL_BIT_LEFT|RAIL_BIT_UPPER|RAIL_BIT_DIAG2))) ||
(image++, !(m5 & (RAIL_BIT_RIGHT|RAIL_BIT_LOWER|RAIL_BIT_DIAG2))) ||
(image++, true);
if (ti->tileh != 0) {
int f = GetRailFoundation(ti->tileh, ti->map5 & 0x3F);
if (f) DrawFoundation(ti, f);
// default sloped sprites..
if (ti->tileh != 0) image = _track_sloped_sprites[ti->tileh - 1] + 0x3F3;
}
if ((_map2[ti->tile] & RAIL_MAP2LO_GROUND_MASK)==RAIL_GROUND_BROWN)
image = (image & 0xFFFF) | 0x3178000; // use a brown palette
else if ((_map2[ti->tile] & RAIL_MAP2LO_GROUND_MASK)==RAIL_GROUND_ICE_DESERT)
image += 26;
DrawGroundSprite(image + tracktype_offs);
if (special) {
if (m5 & RAIL_BIT_DIAG1) DrawGroundSprite(0x3ED + tracktype_offs);
if (m5 & RAIL_BIT_DIAG2) DrawGroundSprite(0x3EE + tracktype_offs);
if (m5 & RAIL_BIT_UPPER) DrawGroundSprite(0x3EF + tracktype_offs);
if (m5 & RAIL_BIT_LOWER) DrawGroundSprite(0x3F0 + tracktype_offs);
if (m5 & RAIL_BIT_LEFT) DrawGroundSprite(0x3F2 + tracktype_offs);
if (m5 & RAIL_BIT_RIGHT) DrawGroundSprite(0x3F1 + tracktype_offs);
}
if (_display_opt & DO_FULL_DETAIL) {
_detailed_track_proc[_map2[ti->tile] & RAIL_MAP2LO_GROUND_MASK](ti);
}
/* draw signals also? */
if (!(ti->map5 & RAIL_TYPE_SIGNALS))
return;
{
byte m23;
m23 = (_map3_lo[ti->tile] >> 4) | (_map2[ti->tile] & 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 & RAIL_BIT_DIAG2)) {
if (!(m5 & RAIL_BIT_DIAG1)) {
if (m5 & RAIL_BIT_LEFT) {
MAYBE_DRAW_SIGNAL(2, 0x509, 0);
MAYBE_DRAW_SIGNAL(3, 0x507, 1);
}
if (m5 & RAIL_BIT_RIGHT) {
MAYBE_DRAW_SIGNAL(0, 0x509, 2);
MAYBE_DRAW_SIGNAL(1, 0x507, 3);
}
if (m5 & RAIL_BIT_UPPER) {
MAYBE_DRAW_SIGNAL(3, 0x505, 4);
MAYBE_DRAW_SIGNAL(2, 0x503, 5);
}
if (m5 & RAIL_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 {
const byte *s;
const DrawTrackSeqStruct *drss;
if (!(m5 & (RAIL_TYPE_MASK&~RAIL_TYPE_SPECIAL)))
return;
if (ti->tileh != 0) { DrawFoundation(ti, ti->tileh); }
s = _track_depot_layout_table[m5 & 0x3F];
image = *(uint16*)s;
if (image & 0x8000) image = (image & 0x7FFF) + tracktype_offs;
// adjust ground tile for desert
// (don't adjust for arctic, because snow in depots looks weird)
if ((_map2[ti->tile] & RAIL_MAP2LO_GROUND_MASK)==RAIL_GROUND_ICE_DESERT && _opt.landscape == LT_DESERT)
{
if(image!=3981)
image += 26; // tile with tracks
else
image = 4550; // flat ground
}
DrawGroundSprite(image);
drss = (const DrawTrackSeqStruct*)(s + sizeof(uint16));
while ((image=drss->image) != 0) {
if (image & 0x8000)
image |= _drawtile_track_palette;
image += tracktype_offs;
if (!(_display_opt & DO_TRANS_BUILDINGS))
image = (image & 0x3FFF) | 0x3224000;
AddSortableSpriteToDraw(image, ti->x | drss->subcoord_x,
ti->y | drss->subcoord_y, drss->width, drss->height, 0x17, ti->z);
drss++;
}
}
}
void DrawTrainDepotSprite(int x, int y, int image, int railtype)
{
uint32 ormod, img;
const DrawTrackSeqStruct *dtss;
const byte *t;
/* baseimage */
railtype *= TRACKTYPE_SPRITE_PITCH;
ormod = PLAYER_SPRITE_COLOR(_local_player);
t = _track_depot_layout_table[image];
x+=33;
y+=17;
img = *(uint16*)t;
if (img & 0x8000) img = (img & 0x7FFF) + railtype;
DrawSprite(img, x, y);
for(dtss = (DrawTrackSeqStruct *)(t + sizeof(uint16)); dtss->image != 0; dtss++) {
Point pt = RemapCoords(dtss->subcoord_x, dtss->subcoord_y, 0);
image = dtss->image;
if (image & 0x8000) image |= ormod;
DrawSprite(image + railtype, x + pt.x, y + pt.y);
}
}
#define NUM_SSD_ENTRY 256
#define NUM_SSD_STACK 32
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(uint tile, SetSignalsData *ssd, int track, uint length, byte *state)
{
// the tile has signals?
if (IS_TILETYPE(tile, MP_RAILWAY)) {
if ((_map5[tile]&RAIL_TYPE_MASK) == RAIL_TYPE_SIGNALS) {
if ((_map3_lo[tile] & _signals_table_both[track]) != 0) {
// is the signal pointing in to the segment existing?
if ((_map3_lo[tile] & _signals_table[track]) != 0) {
// 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 |= (_map3_hi[tile]&1);
}
// is this an exit signal that points out from the segment?
if ((_map3_hi[tile]&2) && _map3_lo[tile]&_signals_table_other[track]) {
ssd->presignal_exits++;
if ((_map2[tile]&_signals_table_other[track]) != 0)
ssd->presignal_exits_free++;
}
return true;
}
} else if (IS_RAIL_DEPOT(_map5[tile]))
return true; // don't look further if the tile is a depot
}
return false;
}
static void SetSignalsAfterProc(TrackPathFinder *tpf)
{
SetSignalsData *ssd = tpf->userdata;
Vehicle *v;
uint tile, hash, val, offs;
TrackPathFinderLink *link;
ssd->stop = false;
// for each train, check if it is in the segment.
// then we know that the signal should be red.
FOR_ALL_VEHICLES(v) {
if (v->type != VEH_Train)
continue;
tile = v->tile;
if (v->u.rail.track == 0x40) { tile = GetVehicleOutOfTunnelTile(v); }
hash = PATHFIND_HASH_TILE(tile);
val = tpf->hash_head[hash];
if (val == 0)
continue;
if (!(val & 0x8000)) {
if ((TileIndex)tile == tpf->hash_tile[hash])
goto check_val;
} else {
offs = tpf->hash_tile[hash];
do {
link = PATHFIND_GET_LINK_PTR(tpf, offs);
if ( (TileIndex)tile == link->tile) {
val = link->flags;
check_val:;
// the train is on the track, in either direction?
if (val & (v->u.rail.track + (v->u.rail.track<<8))) {
ssd->stop = true;
return;
}
break;
}
} 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++) {
uint tile = ssd->tile[i];
byte bit = _signals_table[ssd->bit[i]];
byte m2 = _map2[tile];
// presignals don't turn green if there is at least one presignal exit and none are free
if (_map3_hi[tile] & 1) {
int ex = ssd->presignal_exits, exfree = ssd->presignal_exits_free;
// subtract for dual combo signals so they don't count themselves
if (_map3_hi[tile]&2 && _map3_lo[tile]&_signals_table_other[ssd->bit[i]]) {
ex--;
if ((_map2[tile]&_signals_table_other[ssd->bit[i]]) != 0) 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 signal, it changed.
// If this segment has presignals, then we treat exit signals going into the segment as normal signals.
if (_map3_hi[tile]&2 && (_map3_hi[tile]&1 || !ssd->has_presignal)) {
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");
}
}
// it changed, so toggle it
_map2[tile] = m2 ^ bit;
MarkTileDirtyByTile(tile);
}
}
bool UpdateSignalsOnSegment(uint 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, 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)
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(uint 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]);
}
uint GetSlopeZ_Track(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 checkpoint
return z + 8;
}
return GetPartialZ(ti->x&0xF, ti->y&0xF, th) + z;
}
return z;
}
uint GetSlopeTileh_Track(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 checkpoint
return 0;
}
}
return ti->tileh;
}
static void GetAcceptedCargo_Track(uint tile, AcceptedCargo *ac)
{
/* not used */
}
static void AnimateTile_Track(uint tile)
{
/* not used */
}
static void TileLoop_Track(uint tile)
{
byte a2;
byte rail;
byte m2;
byte owner;
m2 = _map2[tile] & 0xF;
/* special code for alps landscape */
if (_opt.landscape == LT_HILLY) {
/* convert into snow? */
if (GetTileZ(tile) > _opt.snow_line) {
a2 = RAIL_GROUND_ICE_DESERT;
goto modify_me;
}
/* special code for desert landscape */
} else if (_opt.landscape == LT_DESERT) {
/* convert into desert? */
if (GetMapExtraBits(tile) == 1) {
a2 = RAIL_GROUND_ICE_DESERT;
goto modify_me;
}
}
// Don't continue tile loop for depots
if (_map5[tile] & RAIL_TYPE_SPECIAL)
return;
a2 = RAIL_GROUND_GREEN;
if (m2 != RAIL_GROUND_BROWN) { /* wait until bottom is green */
/* determine direction of fence */
rail = _map5[tile] & RAIL_BIT_MASK;
if (rail == RAIL_BIT_UPPER) {
a2 = RAIL_GROUND_FENCE_HORIZ1;
} else if (rail == RAIL_BIT_LOWER) {
a2 = RAIL_GROUND_FENCE_HORIZ2;
} else if (rail == RAIL_BIT_LEFT) {
a2 = RAIL_GROUND_FENCE_VERT1;
} else if (rail == RAIL_BIT_RIGHT) {
a2 = RAIL_GROUND_FENCE_VERT2;
} else {
owner = _map_owner[tile];
if ( (!(rail&(RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LEFT)) && (rail&RAIL_BIT_DIAG1)) || rail==(RAIL_BIT_LOWER|RAIL_BIT_RIGHT)) {
if (!IS_TILETYPE(tile + TILE_XY(0,-1), MP_RAILWAY) ||
owner != _map_owner[tile + TILE_XY(0,-1)] ||
(_map5[tile + TILE_XY(0,-1)]==RAIL_BIT_UPPER || _map5[tile + TILE_XY(0,-1)]==RAIL_BIT_LEFT))
a2 = RAIL_GROUND_FENCE_NW;
}
if ( (!(rail&(RAIL_BIT_DIAG2|RAIL_BIT_LOWER|RAIL_BIT_RIGHT)) && (rail&RAIL_BIT_DIAG1)) || rail==(RAIL_BIT_UPPER|RAIL_BIT_LEFT)) {
if (!IS_TILETYPE(tile + TILE_XY(0,1), MP_RAILWAY) ||
owner != _map_owner[tile + TILE_XY(0,1)] ||
(_map5[tile + TILE_XY(0,1)]==RAIL_BIT_LOWER || _map5[tile + TILE_XY(0,1)]==RAIL_BIT_RIGHT))
a2 = (a2 == RAIL_GROUND_FENCE_NW) ? RAIL_GROUND_FENCE_SENW : RAIL_GROUND_FENCE_SE;
}
if ( (!(rail&(RAIL_BIT_DIAG1|RAIL_BIT_UPPER|RAIL_BIT_RIGHT)) && (rail&RAIL_BIT_DIAG2)) || rail==(RAIL_BIT_LOWER|RAIL_BIT_LEFT)) {
if (!IS_TILETYPE(tile + TILE_XY(-1,0), MP_RAILWAY) ||
owner != _map_owner[tile + TILE_XY(-1,0)] ||
(_map5[tile + TILE_XY(-1,0)]==RAIL_BIT_UPPER || _map5[tile + TILE_XY(-1,0)]==RAIL_BIT_RIGHT))
a2 = RAIL_GROUND_FENCE_NE;
}
if ( (!(rail&(RAIL_BIT_DIAG1|RAIL_BIT_LOWER|RAIL_BIT_LEFT)) && (rail&RAIL_BIT_DIAG2)) || rail==(RAIL_BIT_UPPER|RAIL_BIT_RIGHT)) {
if (!IS_TILETYPE(tile + TILE_XY(1,0), MP_RAILWAY) ||
owner != _map_owner[tile + TILE_XY(1,0)] ||
(_map5[tile + TILE_XY(1,0)]==RAIL_BIT_LOWER || _map5[tile + TILE_XY(1,0)]==RAIL_BIT_LEFT))
a2 = (a2 == RAIL_GROUND_FENCE_NE) ? RAIL_GROUND_FENCE_NESW : RAIL_GROUND_FENCE_SW;
}
}
}
modify_me:;
/* tile changed? */
if ( m2 != a2) {
_map2[tile] = (_map2[tile] & ~RAIL_MAP2LO_GROUND_MASK) | a2;
MarkTileDirtyByTile(tile);
}
}
static uint32 GetTileTrackStatus_Track(uint tile, int mode) {
byte m5, a, b;
uint32 ret;
if (mode != 0)
return 0;
m5 = _map5[tile];
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 = _map3_lo[tile];
b = _map2[tile];
b &= a;
/* When signals are not present (in neither
* direction), we pretend them to be green. (So if
* signals are only one way, the other way will
* implicitely become `red' */
if ((a & 0xC0) == 0) { b |= 0xC0; }
if ((a & 0x30) == 0) { b |= 0x30; }
if ( (b & 0x80) == 0) ret |= 0x10070000;
if ( (b & 0x40) == 0) ret |= 0x7100000;
if ( (b & 0x20) == 0) ret |= 0x20080000;
if ( (b & 0x10) == 0) ret |= 0x8200000;
}
} 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(uint tile)
{
if (IS_RAIL_DEPOT(_map5[tile]))
ShowTrainDepotWindow(tile);
else if (IS_RAIL_CHECKPOINT(_map5[tile]))
ShowRenameCheckpointWindow(&_checkpoints[GetCheckpointByTile(tile)]);
}
static void GetTileDesc_Track(uint tile, TileDesc *td)
{
byte m5 = _map5[tile];
if (!(m5 & 0x80)) {
if(!(m5 & 0x40)) // no signals
td->str = STR_1021_RAILROAD_TRACK;
else
{
switch(_map3_hi[tile] & 0x03)
{
case 0: td->str = STR_RAILROAD_TRACK_WITH_NORMAL_SIGNALS;
break;
case 1: td->str = STR_RAILROAD_TRACK_WITH_PRESIGNALS;
break;
case 2: td->str = STR_RAILROAD_TRACK_WITH_EXITSIGNALS;
break;
case 3: td->str = STR_RAILROAD_TRACK_WITH_COMBOSIGNALS;
break;
}
}
} else {
td->str = m5 < 0xC4 ? STR_1023_RAILROAD_TRAIN_DEPOT : STR_LANDINFO_CHECKPOINT;
}
td->owner = _map_owner[tile];
}
static void ChangeTileOwner_Track(uint tile, byte old_player, byte new_player)
{
if (_map_owner[tile] != old_player)
return;
if (new_player != 255) {
_map_owner[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 _fractcoords_leave[4] = { 0x81, 0xD8, 0x8D, 0x18 };
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};
uint32 VehicleEnter_Track(Vehicle *v, uint tile, int x, int y)
{
byte fract_coord;
int dir;
// this routine applies only to trains in depot tiles
if (v->type != VEH_Train || !IS_RAIL_DEPOT(_map5[tile]))
return 0;
/* depot direction */
dir = _map5[tile] & RAIL_DEPOT_DIR;
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 (_fractcoords_leave[dir] == 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];
}
}
}
return 0;
}
void InitializeRail()
{
_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 */
};