diff options
Diffstat (limited to 'rail_cmd.c')
| -rw-r--r-- | rail_cmd.c | 44 |
1 files changed, 11 insertions, 33 deletions
diff --git a/rail_cmd.c b/rail_cmd.c index 12c6bddd0..57724e787 100644 --- a/rail_cmd.c +++ b/rail_cmd.c @@ -1083,52 +1083,30 @@ int32 CmdBuildSignalTrack(int x, int y, uint32 flags, uint32 p1, uint32 p2) } /* Remove signals - * p1 bits 0..2 = track + * p1 bits 0-2 = track, valid values: 0-5 * p2 = unused */ - int32 CmdRemoveSingleSignal(int x, int y, uint32 flags, uint32 p1, uint32 p2) { - TileInfo ti; - uint tile; - int track = p1 & 0x7; - byte a,b,c,d; - - 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; + TileIndex tile = TILE_FROM_XY(x, y); + uint track = p1 & 0x7; - /* Map5 mode is 0x40 when there's signals */ - if ((ti.map5 & RAIL_TYPE_MASK) != RAIL_TYPE_SIGNALS) + if (!(track < 6) || // only 6 possible track-combinations + !IsTileType(tile, MP_RAILWAY) || + !EnsureNoVehicle(tile)) return CMD_ERROR; - /* Who owns the tile? */ - if (_current_player != OWNER_WATER && !CheckTileOwnership(tile)) + if ((_map5[tile] & RAIL_TYPE_MASK) != RAIL_TYPE_SIGNALS || + (_map3_lo[tile] & _signals_table_both[track]) == 0) // signals on track? return CMD_ERROR; - // calculate already built signals - 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; + if (!CheckTileOwnership(tile)) return CMD_ERROR; - /* no signals on selected track? */ - if (d == 0) - return CMD_ERROR; + SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION); /* Do it? */ if (flags & DC_EXEC) { - - _map3_lo[tile] &= ~c; + _map3_lo[tile] &= ~_signals_table_both[track]; /* removed last signal from tile? */ if ((_map3_lo[tile] & 0xF0) == 0) { |