/* static */ bool AIRail::BuildRailWaypoint(TileIndex tile)
{
EnforcePrecondition(false, ::IsValidTile(tile));
EnforcePrecondition(false, IsRailTile(tile));
EnforcePrecondition(false, GetRailTracks(tile) == RAILTRACK_NE_SW || GetRailTracks(tile) == RAILTRACK_NW_SE);
EnforcePrecondition(false, IsRailTypeAvailable(GetCurrentRailType()));
return AIObject::DoCommand(tile, GetCurrentRailType() | (GetRailTracks(tile) == RAILTRACK_NE_SW ? AXIS_X : AXIS_Y) << 4 | 1 << 8 | 1 << 16, STAT_CLASS_WAYP | INVALID_STATION << 16, CMD_BUILD_RAIL_WAYPOINT);
}
/* static */ bool ScriptRail::BuildSignal(TileIndex tile, TileIndex front, SignalType signal)
{
EnforcePrecondition(false, ScriptObject::GetCompany() != OWNER_DEITY);
EnforcePrecondition(false, ScriptMap::DistanceManhattan(tile, front) == 1)
EnforcePrecondition(false, ::IsPlainRailTile(tile));
EnforcePrecondition(false, ::IsValidSignalType(signal));
Track track = INVALID_TRACK;
uint signal_cycles;
int data_index = 2 + (::TileX(front) - ::TileX(tile)) + 2 * (::TileY(front) - ::TileY(tile));
for (int i = 0; i < NUM_TRACK_DIRECTIONS; i++) {
const Track &t = _possible_trackdirs[data_index][i].track;
if (!(::TrackToTrackBits(t) & GetRailTracks(tile))) continue;
track = t;
signal_cycles = _possible_trackdirs[data_index][i].signal_cycles;
break;
}
EnforcePrecondition(false, track != INVALID_TRACK);
uint p1 = track;
if (signal < SIGNALTYPE_TWOWAY) {
if (signal != SIGNALTYPE_PBS && signal != SIGNALTYPE_PBS_ONEWAY) signal_cycles++;
p1 |= (signal_cycles << 15);
}
p1 |= ((signal >= SIGNALTYPE_TWOWAY ? signal ^ SIGNALTYPE_TWOWAY : signal) << 5);
return ScriptObject::DoCommand(tile, p1, 0, CMD_BUILD_SIGNALS);
}
/* static */ bool AIRail::RemoveRailTrack(TileIndex tile, RailTrack rail_track)
{
EnforcePrecondition(false, ::IsValidTile(tile));
EnforcePrecondition(false, ::IsPlainRailTile(tile) || ::IsLevelCrossingTile(tile));
EnforcePrecondition(false, GetRailTracks(tile) & rail_track);
EnforcePrecondition(false, KillFirstBit((uint)rail_track) == 0);
return AIObject::DoCommand(tile, tile, GetCurrentRailType() | (FindFirstTrack((::TrackBits)rail_track) << 4), CMD_REMOVE_RAILROAD_TRACK);
}
/* static */ bool AIRail::RemoveSignal(TileIndex tile, TileIndex front)
{
EnforcePrecondition(false, AIMap::DistanceManhattan(tile, front) == 1)
EnforcePrecondition(false, GetSignalType(tile, front) != SIGNALTYPE_NONE);
Track track = INVALID_TRACK;
int data_index = 2 + (::TileX(front) - ::TileX(tile)) + 2 * (::TileY(front) - ::TileY(tile));
for (int i = 0; i < NUM_TRACK_DIRECTIONS; i++) {
const Track &t = _possible_trackdirs[data_index][i].track;
if (!(::TrackToTrackBits(t) & GetRailTracks(tile))) continue;
track = t;
break;
}
EnforcePrecondition(false, track != INVALID_TRACK);
return AIObject::DoCommand(tile, track, 0, CMD_REMOVE_SIGNALS);
}
/* static */ ScriptRail::SignalType ScriptRail::GetSignalType(TileIndex tile, TileIndex front)
{
if (ScriptMap::DistanceManhattan(tile, front) != 1) return SIGNALTYPE_NONE;
if (!::IsTileType(tile, MP_RAILWAY) || !::HasSignals(tile)) return SIGNALTYPE_NONE;
int data_index = 2 + (::TileX(front) - ::TileX(tile)) + 2 * (::TileY(front) - ::TileY(tile));
for (int i = 0; i < NUM_TRACK_DIRECTIONS; i++) {
const Track &track = _possible_trackdirs[data_index][i].track;
if (!(::TrackToTrackBits(track) & GetRailTracks(tile))) continue;
if (!HasSignalOnTrack(tile, track)) continue;
if (!HasSignalOnTrackdir(tile, _possible_trackdirs[data_index][i].trackdir)) continue;
SignalType st = (SignalType)::GetSignalType(tile, track);
if (HasSignalOnTrackdir(tile, ::ReverseTrackdir(_possible_trackdirs[data_index][i].trackdir))) st = (SignalType)(st | SIGNALTYPE_TWOWAY);
return st;
}
return SIGNALTYPE_NONE;
}
/* static */ bool ScriptRail::AreTilesConnected(TileIndex from, TileIndex tile, TileIndex to)
{
if (!IsRailTile(tile)) return false;
if (from == to || ScriptMap::DistanceManhattan(from, tile) != 1 || ScriptMap::DistanceManhattan(tile, to) != 1) return false;
if (to < from) ::Swap(from, to);
if (tile - from == 1) {
if (to - tile == 1) return (GetRailTracks(tile) & RAILTRACK_NE_SW) != 0;
if (to - tile == ::MapSizeX()) return (GetRailTracks(tile) & RAILTRACK_NE_SE) != 0;
} else if (tile - from == ::MapSizeX()) {
if (tile - to == 1) return (GetRailTracks(tile) & RAILTRACK_NW_NE) != 0;
if (to - tile == 1) return (GetRailTracks(tile) & RAILTRACK_NW_SW) != 0;
if (to - tile == ::MapSizeX()) return (GetRailTracks(tile) & RAILTRACK_NW_SE) != 0;
} else {
return (GetRailTracks(tile) & RAILTRACK_SW_SE) != 0;
}
NOT_REACHED();
}
