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(svn r13963) -Codechange [YAPP]: Reserve a track when entering a PBS block through a conventional signal. (michi_cc)

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rubidium 2008-08-02 22:56:35 +00:00
parent 5c9bb1bbd6
commit 47a5faf874
1 changed files with 23 additions and 3 deletions
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26
src/train_cmd.cpp
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@ -3396,14 +3396,18 @@ static inline void AffectSpeedByZChange(Vehicle *v, byte old_z)
}
}
static void TrainMovedChangeSignals(TileIndex tile, DiagDirection dir)
static bool TrainMovedChangeSignals(TileIndex tile, DiagDirection dir)
{
if (IsTileType(tile, MP_RAILWAY) &&
GetRailTileType(tile) == RAIL_TILE_SIGNALS) {
TrackdirBits tracks = TrackBitsToTrackdirBits(GetTrackBits(tile)) & DiagdirReachesTrackdirs(dir);
Trackdir trackdir = FindFirstTrackdir(tracks);
UpdateSignalsOnSegment(tile, TrackdirToExitdir(trackdir), GetTileOwner(tile));
if (UpdateSignalsOnSegment(tile, TrackdirToExitdir(trackdir), GetTileOwner(tile)) == SIGSEG_PBS && HasSignalOnTrackdir(tile, trackdir)) {
/* A PBS block with a non-PBS signal facing us? */
if (!IsPbsSignal(GetSignalType(tile, TrackdirToTrack(trackdir)))) return true;
}
}
return false;
}
@ -3766,7 +3770,23 @@ static void TrainController(Vehicle *v, Vehicle *nomove, bool update_image)
}
if (update_signals_crossing) {
if (IsFrontEngine(v)) TrainMovedChangeSignals(gp.new_tile, enterdir);
if (IsFrontEngine(v)) {
if (TrainMovedChangeSignals(gp.new_tile, enterdir)) {
/* We are entering a block with PBS signals right now, but
* not through a PBS signal. This means we don't have a
* reservation right now. As a conventional signal will only
* ever be green if no other train is in the block, getting
* a path should always be possible. If the player built
* such a strange network that it is not possible, the train
* will be marked as stuck and the player has to deal with
* the problem. */
if ((!HasReservedTracks(gp.new_tile, v->u.rail.track) &&
!TryReserveRailTrack(gp.new_tile, FindFirstTrack(v->u.rail.track))) ||
!TryPathReserve(v)) {
MarkTrainAsStuck(v);
}
}
}
/* Signals can only change when the first
* (above) or the last vehicle moves. */