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(svn r12191) -Fix: Do not start overtaking if the RV reaches wrong-way one-way-road in the next tiles.

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This commit is contained in:
frosch 2008-02-20 14:07:45 +00:00
parent 2b8d1bcb51
commit 0e9e94a94b
1 changed files with 28 additions and 22 deletions
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50
src/roadveh_cmd.cpp
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@ -1008,10 +1008,10 @@ struct OvertakeData {
const Vehicle* u;
const Vehicle* v;
TileIndex tile;
uint16 tilebits;
Trackdir trackdir;
};
static void* EnumFindVehToOvertake(Vehicle* v, void* data)
static void* EnumFindVehBlockingOvertake(Vehicle* v, void* data)
{
const OvertakeData* od = (OvertakeData*)data;
@ -1020,22 +1020,29 @@ static void* EnumFindVehToOvertake(Vehicle* v, void* data)
v : NULL;
}
static bool FindRoadVehToOvertake(OvertakeData *od)
/**
* Check if overtaking is possible on a piece of track
*
* @param od Information about the tile and the involved vehicles
* @return true if we have to abort overtaking
*/
static bool CheckRoadBlockedForOvertaking(OvertakeData *od)
{
uint32 bits;
uint32 ts = GetTileTrackStatus(od->tile, TRANSPORT_ROAD, od->v->u.road.compatible_roadtypes);
TrackdirBits trackdirbits = (TrackdirBits)(ts & TRACKDIR_BIT_MASK);
TrackdirBits red_signals = (TrackdirBits)((ts >> 16) & TRACKDIR_BIT_MASK); // barred level crossing
TrackBits trackbits = TrackdirBitsToTrackBits(trackdirbits);
bits = GetTileTrackStatus(od->tile, TRANSPORT_ROAD, od->v->u.road.compatible_roadtypes);
bits |= bits >> 8;
/* Track does not continue along overtaking direction || track has junction || levelcrossing is barred */
if (!HasBit(trackdirbits, od->trackdir) || (trackbits & ~TRACK_BIT_CROSS) || (red_signals != TRACKDIR_BIT_NONE)) return true;
if (!(od->tilebits & bits) || (bits & 0x3C3C) || (bits & 0x3F3F0000))
return true;
return VehicleFromPos(od->tile, od, EnumFindVehToOvertake) != NULL;
/* Are there more vehicles on the tile except the two vehicles involved in overtaking */
return VehicleFromPos(od->tile, od, EnumFindVehBlockingOvertake) != NULL;
}
static void RoadVehCheckOvertake(Vehicle *v, Vehicle *u)
{
OvertakeData od;
uint16 tt;
od.v = v;
od.u = u;
@ -1055,32 +1062,31 @@ static void RoadVehCheckOvertake(Vehicle *v, Vehicle *u)
/* For now, articulated road vehicles can't overtake anything. */
if (RoadVehHasArticPart(v)) return;
/* Vehicles are not driving in same direction || direction is not a diagonal direction */
if (v->direction != u->direction || !(v->direction & 1)) return;
/* Check if vehicle is in a road stop, depot, tunnel or bridge or not on a straight road */
if (v->u.road.state >= RVSB_IN_ROAD_STOP || !IsStraightRoadTrackdir((Trackdir)(v->u.road.state & RVSB_TRACKDIR_MASK))) return;
tt = GetTileTrackStatus(v->tile, TRANSPORT_ROAD, v->u.road.compatible_roadtypes);
tt |= tt >> 8;
tt &= 0x3F;
if ((tt & 3) == 0) return;
if ((tt & 0x3C) != 0) return;
if (tt == 3) tt = (v->direction & 2) ? 2 : 1;
od.tilebits = tt;
od.trackdir = DiagdirToDiagTrackdir(DirToDiagDir(v->direction));
/* Are the current and the next tile suitable for overtaking?
* - Does the track continue along od.trackdir
* - No junctions
* - No barred levelcrossing
* - No other vehicles in the way
*/
od.tile = v->tile;
if (FindRoadVehToOvertake(&od)) return;
if (CheckRoadBlockedForOvertaking(&od)) return;
od.tile = v->tile + TileOffsByDiagDir(DirToDiagDir(v->direction));
if (FindRoadVehToOvertake(&od)) return;
if (CheckRoadBlockedForOvertaking(&od)) return;
if (od.u->cur_speed == 0 || od.u->vehstatus& VS_STOPPED) {
v->u.road.overtaking_ctr = 0x11;
v->u.road.overtaking = 0x10;
} else {
// if (FindRoadVehToOvertake(&od)) return;
// if (CheckRoadBlockedForOvertaking(&od)) return;
v->u.road.overtaking_ctr = 0;
v->u.road.overtaking = 0x10;
}