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(svn r2625) - Fix: [pbs] Store the end of a train's reserved path explicitly. Prevents trains from unreserving eachothers paths in some cases. 

- CodeChange: Use the TrackdirToTrack function instead of &7, and remove an unneeded variable.
This commit is contained in:
hackykid 2005-07-17 20:09:02 +00:00
parent eabc482184
commit 1d11bbb34d
6 changed files with 56 additions and 28 deletions
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24
npf.c
View File

@ -180,27 +180,35 @@ void NPFReservePBSPath(AyStar *as)
* BUT, you have to have a pretty fucked up junction layout for this to happen,
* so we'll just stop this train, the user will eventually notice, so he can fix it.
*/
PBSClearPath(start, trackdir);
PBSClearPath(start, trackdir, curr->node.tile, curr->node.direction);
NPFSetFlag(&ftd->node, NPF_FLAG_PBS_BLOCKED, true);
DEBUG(pbs, 1) ("PBS: Self-crossing path!!!");
return;
};
PBSReserveTrack(curr->node.tile, (curr->node.direction & 7) );
PBSReserveTrack(curr->node.tile, TrackdirToTrack(curr->node.direction) );
/* we want to reserve the last tile (with the signal) on the path too */
if (prev != NULL && start == INVALID_TILE) {
PBSReserveTrack(prev->node.tile, (prev->node.direction & 7) );
start = prev->node.tile;
trackdir = ReverseTrackdir(prev->node.direction);
/* we want to reserve the last tile (with the signal) on the path too
also remember this tile, cause its the end of the path (where we exit the block) */
if (start == INVALID_TILE) {
if (prev != NULL) {
PBSReserveTrack(prev->node.tile, TrackdirToTrack(prev->node.direction) );
start = prev->node.tile;
trackdir = ReverseTrackdir(prev->node.direction);
} else {
start = curr->node.tile;
trackdir = curr->node.direction;
}
}
}
prev = curr;
curr = curr->parent;
} while (curr != NULL);
// we remember the tile/track where this path leaves the pbs junction
ftd->node.tile = start;
ftd->node.direction = trackdir;
}
}

14
pbs.c
View File

@ -189,13 +189,17 @@ void PBSClearTrack(TileIndex tile, Track track) {
MarkTileDirtyByTile(tile);
};
void PBSClearPath(TileIndex tile, Trackdir trackdir) {
void PBSClearPath(TileIndex tile, Trackdir trackdir, TileIndex end_tile, Trackdir end_trackdir) {
uint16 res;
FindLengthOfTunnelResult flotr;
assert(IsValidTile(tile));
assert((trackdir & ~8) <= 5);
assert(IsValidTrackdir(trackdir));
do {
PBSClearTrack(tile, trackdir & 7);
PBSClearTrack(tile, TrackdirToTrack(trackdir));
if (tile == end_tile && TrackdirToTrack(trackdir) == TrackdirToTrack(end_trackdir))
return;
if (IsTileType(tile, MP_TUNNELBRIDGE) && (_m[tile].m5 & 0xF0)==0 && (unsigned)(_m[tile].m5 & 3) == TrackdirToExitdir(trackdir)) {
// this is a tunnel
@ -204,11 +208,7 @@ void PBSClearPath(TileIndex tile, Trackdir trackdir) {
tile = flotr.tile;
} else {
byte exitdir = TrackdirToExitdir(trackdir);
if (IsTileDepotType(tile, TRANSPORT_RAIL) && (exitdir != GetDepotDirection(tile, TRANSPORT_RAIL)))
return;
tile = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDir(exitdir));
if (IsTileDepotType(tile, TRANSPORT_RAIL) && (exitdir != ReverseDiagdir(GetDepotDirection(tile, TRANSPORT_RAIL))))
return;
};
res = PBSTileReserved(tile);

4
pbs.h
View File

@ -56,11 +56,13 @@ void PBSClearTrack(TileIndex tile, Track track);
* @param track The track to unreserve, valid values 0-5.
*/
void PBSClearPath(TileIndex tile, Trackdir trackdir);
void PBSClearPath(TileIndex tile, Trackdir trackdir, TileIndex end_tile, Trackdir end_trackdir);
/**<
* Follows a planned(reserved) path, and unreserves the tracks.
* @param tile The tile on which the path starts
* @param trackdir The trackdirection in which the path starts
* @param end_tile The tile on which the path ends
* @param end_trackdir The trackdirection in which the path ends
*/
bool PBSIsPbsSignal(TileIndex tile, Trackdir trackdir);

34
train_cmd.c
View File

@ -1321,13 +1321,15 @@ static void ReverseTrainDirection(Vehicle *v)
int l = 0, r = -1;
Vehicle *u;
TileIndex tile;
byte trackdir;
Trackdir trackdir;
TileIndex pbs_end_tile = v->u.rail.pbs_end_tile; // these may be changed, and we may need
Trackdir pbs_end_trackdir = v->u.rail.pbs_end_trackdir; // the old values, so cache them
u = GetLastVehicleInChain(v);
tile = GetVehicleTileOutOfTunnel(u, false);
trackdir = ReverseTrackdir(GetVehicleTrackdir(u));
if (PBSTileReserved(tile) & (1 << (trackdir&7))) {
if (PBSTileReserved(tile) & (1 << TrackdirToTrack(trackdir))) {
NPFFindStationOrTileData fstd;
NPFFoundTargetData ftd;
@ -1351,13 +1353,15 @@ static void ReverseTrainDirection(Vehicle *v)
return;
}
}
v->u.rail.pbs_end_tile = ftd.node.tile;
v->u.rail.pbs_end_trackdir = ftd.node.direction;
}
tile = GetVehicleTileOutOfTunnel(v, false);
trackdir = GetVehicleTrackdir(v);
if (v->u.rail.pbs_status == PBS_STAT_HAS_PATH) {
byte trackdir = GetVehicleTrackdir(v);
TileIndex tile = AddTileIndexDiffCWrap(v->tile, TileIndexDiffCByDir(TrackdirToExitdir(trackdir)));
uint32 ts;
assert(tile != INVALID_TILE);
@ -1365,10 +1369,10 @@ static void ReverseTrainDirection(Vehicle *v)
ts &= TrackdirReachesTrackdirs(trackdir);
assert(ts != 0 && KillFirstBit2x64(ts) == 0);
trackdir = FindFirstBit2x64(ts);
PBSClearPath(tile, trackdir);
PBSClearPath(tile, trackdir, pbs_end_tile, pbs_end_trackdir);
v->u.rail.pbs_status = PBS_STAT_NONE;
} else if (PBSTileReserved(tile) & (1 << (trackdir&7))) {
PBSClearPath(tile, trackdir);
} else if (PBSTileReserved(tile) & (1 << TrackdirToTrack(trackdir))) {
PBSClearPath(tile, trackdir, pbs_end_tile, pbs_end_trackdir);
if (v->u.rail.track != 0x40)
PBSReserveTrack(tile, trackdir & 7);
};
@ -1838,8 +1842,11 @@ static bool CheckTrainStayInDepot(Vehicle *v)
if (NPFGetFlag(&ftd.node, NPF_FLAG_PBS_EXIT)) {
if (NPFGetFlag(&ftd.node, NPF_FLAG_PBS_BLOCKED) || NPFGetFlag(&ftd.node, NPF_FLAG_PBS_RED))
return true;
else
else {
v->u.rail.pbs_end_tile = ftd.node.tile;
v->u.rail.pbs_end_trackdir = ftd.node.direction;
goto green;
}
}
}
@ -2007,11 +2014,14 @@ static byte ChooseTrainTrack(Vehicle *v, TileIndex tile, int enterdir, TrackdirB
if (pbs_tracks || (v->u.rail.pbs_status == PBS_STAT_NEED_PATH)) {
DEBUG(pbs, 2) ("pbs: (%i) choosefromblock, tile_org:%x tile_dst:%x trackdir:%i pbs_tracks:%i",v->unitnumber, tile,tile - TileOffsByDir(enterdir), trackdir, pbs_tracks);
// clear the currently planned path
if (v->u.rail.pbs_status != PBS_STAT_NEED_PATH) PBSClearPath(tile, FindFirstBit2x64(pbs_tracks));
if (v->u.rail.pbs_status != PBS_STAT_NEED_PATH) PBSClearPath(tile, FindFirstBit2x64(pbs_tracks), v->u.rail.pbs_end_tile, v->u.rail.pbs_end_trackdir);
// try to find a route to a green exit signal
ftd = NPFRouteToStationOrTile(tile - TileOffsByDir(enterdir), trackdir, &fstd, TRANSPORT_RAIL, v->owner, v->u.rail.railtype, PBS_MODE_ANY);
v->u.rail.pbs_end_tile = ftd.node.tile;
v->u.rail.pbs_end_trackdir = ftd.node.direction;
} else
ftd = NPFRouteToStationOrTile(tile - TileOffsByDir(enterdir), trackdir, &fstd, TRANSPORT_RAIL, v->owner, v->u.rail.railtype, PBS_MODE_NONE);
@ -2779,6 +2789,8 @@ static void TrainController(Vehicle *v)
if (NPFGetFlag(&ftd.node, NPF_FLAG_PBS_BLOCKED) || NPFGetFlag(&ftd.node, NPF_FLAG_PBS_RED))
goto red_light;
else {
v->u.rail.pbs_end_tile = ftd.node.tile;
v->u.rail.pbs_end_trackdir = ftd.node.direction;
goto green_light;
}
@ -2955,8 +2967,8 @@ static void DeleteLastWagon(Vehicle *v)
// clear up reserved pbs tracks
if (PBSTileReserved(v->tile) & v->u.rail.track) {
if (v == u) {
PBSClearPath(v->tile, FIND_FIRST_BIT(v->u.rail.track));
PBSClearPath(v->tile, FIND_FIRST_BIT(v->u.rail.track) + 8);
PBSClearPath(v->tile, FIND_FIRST_BIT(v->u.rail.track), v->u.rail.pbs_end_tile, v->u.rail.pbs_end_trackdir);
PBSClearPath(v->tile, FIND_FIRST_BIT(v->u.rail.track) + 8, v->u.rail.pbs_end_tile, v->u.rail.pbs_end_trackdir);
};
if (v->tile != u->tile) {
PBSClearTrack(v->tile, FIND_FIRST_BIT(v->u.rail.track));
@ -3206,6 +3218,8 @@ static bool TrainCheckIfLineEnds(Vehicle *v)
if (ftd.best_trackdir != 0xFF && NPFGetFlag(&ftd.node, NPF_FLAG_PBS_EXIT)) {
if (!(NPFGetFlag(&ftd.node, NPF_FLAG_PBS_BLOCKED) || NPFGetFlag(&ftd.node, NPF_FLAG_PBS_RED))) {
v->u.rail.pbs_status = PBS_STAT_HAS_PATH;
v->u.rail.pbs_end_tile = ftd.node.tile;
v->u.rail.pbs_end_trackdir = ftd.node.direction;
return true;
}
};

6
vehicle.c
View File

@ -1947,8 +1947,10 @@ static const SaveLoad _train_desc[] = {
SLE_CONDVARX(offsetof(Vehicle,u)+offsetof(VehicleRail,days_since_order_progr), SLE_UINT16, 2, 255),
SLE_CONDVARX(offsetof(Vehicle,u)+offsetof(VehicleRail,pbs_status), SLE_UINT8, 2, 255),
// reserve extra space in savegame here. (currently 12 bytes)
SLE_CONDARR(NullStruct,null,SLE_FILE_U8 | SLE_VAR_NULL, 12, 2, 255),
SLE_CONDVARX(offsetof(Vehicle,u)+offsetof(VehicleRail,pbs_end_tile), SLE_UINT32, 2, 255),
SLE_CONDVARX(offsetof(Vehicle,u)+offsetof(VehicleRail,pbs_end_trackdir), SLE_UINT8, 2, 255),
// reserve extra space in savegame here. (currently 7 bytes)
SLE_CONDARR(NullStruct,null,SLE_FILE_U8 | SLE_VAR_NULL, 7, 2, 255),
SLE_END()
};

2
vehicle.h
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@ -70,6 +70,8 @@ typedef struct VehicleRail {
byte flags;
byte pbs_status;
TileIndex pbs_end_tile;
Trackdir pbs_end_trackdir;
} VehicleRail;
enum {