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(svn r23290) -Fix [FS#2379,FS#3569]: Change the centre of train vehicles to depend on the vehicle length instead of being fixed at 4/8th of the original vehicle length to make sure shortened vehicles don't block tiles they shouldn't block.

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This commit is contained in:
michi_cc
2011-11-21 20:51:43 +00:00
parent 3748cab608
commit 4d2a9e384c
10 changed files with 230 additions and 59 deletions
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90
src/saveload/vehicle_sl.cpp
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@@ -249,8 +249,6 @@ void AfterLoadVehicles(bool part_of_load)
if (v->Next() != NULL) v->Next()->previous = v;
if (v->NextShared() != NULL) v->NextShared()->previous_shared = v;
v->UpdateDeltaXY(v->direction);
if (part_of_load) v->fill_percent_te_id = INVALID_TE_ID;
v->first = NULL;
if (v->IsGroundVehicle()) v->GetGroundVehicleCache()->first_engine = INVALID_ENGINE;
@@ -442,11 +440,99 @@ void AfterLoadVehicles(bool part_of_load)
default: break;
}
v->UpdateDeltaXY(v->direction);
v->coord.left = INVALID_COORD;
VehicleMove(v, false);
}
}
bool TrainController(Train *v, Vehicle *nomove, bool reverse = true); // From train_cmd.cpp
void ReverseTrainDirection(Train *v);
void ReverseTrainSwapVeh(Train *v, int l, int r);
/** Fixup old train spacing. */
void FixupTrainLengths()
{
/* Vehicle center was moved from 4 units behind the front to half the length
* behind the front. Move vehicles so they end up on the same spot. */
Vehicle *v;
FOR_ALL_VEHICLES(v) {
if (v->type == VEH_TRAIN && v->IsPrimaryVehicle()) {
/* The vehicle center is now more to the front depending on vehicle length,
* so we need to move all vehicles forward to cover the difference to the
* old center, otherwise wagon spacing in trains would be broken upon load. */
for (Train *u = Train::From(v); u != NULL; u = u->Next()) {
if (u->track == TRACK_BIT_DEPOT || (u->vehstatus & VS_CRASHED)) continue;
Train *next = u->Next();
/* Try to pull the vehicle half its length forward. */
int diff = (VEHICLE_LENGTH - u->gcache.cached_veh_length) / 2;
int done;
for (done = 0; done < diff; done++) {
if (!TrainController(u, next, false)) break;
}
if (next != NULL && done < diff && u->IsFrontEngine()) {
/* Pulling the front vehicle forwards failed, we either encountered a dead-end
* or a red signal. To fix this, we try to move the whole train the required
* space backwards and re-do the fix up of the front vehicle. */
/* Ignore any signals when backtracking. */
TrainForceProceeding old_tfp = u->force_proceed;
u->force_proceed = TFP_SIGNAL;
/* Swap start<>end, start+1<>end-1, ... */
int r = CountVehiclesInChain(u) - 1; // number of vehicles - 1
int l = 0;
do ReverseTrainSwapVeh(u, l++, r--); while (l <= r);
/* We moved the first vehicle which is now the last. Move it back to the
* original position as we will fix up the last vehicle later in the loop. */
for (int i = 0; i < done; i++) TrainController(u->Last(), NULL);
/* Move the train backwards to get space for the first vehicle. As the stopping
* distance from a line end is rounded up, move the train one unit more to cater
* for front vehicles with odd lengths. */
int moved;
for (moved = 0; moved < diff + 1; moved++) {
if (!TrainController(u, NULL, false)) break;
}
/* Swap start<>end, start+1<>end-1, ... again. */
r = CountVehiclesInChain(u) - 1; // number of vehicles - 1
l = 0;
do ReverseTrainSwapVeh(u, l++, r--); while (l <= r);
u->force_proceed = old_tfp;
/* Tracks are too short to fix the train length. The player has to fix the
* train in a depot. Bail out so we don't damage the vehicle chain any more. */
if (moved < diff + 1) break;
/* Re-do the correction for the first vehicle. */
for (done = 0; done < diff; done++) TrainController(u, next, false);
/* We moved one unit more backwards than needed for even-length front vehicles,
* try to move that unit forward again. We don't care if this step fails. */
TrainController(u, NULL, false);
}
/* If the next wagon is still in a depot, check if it shouldn't be outside already. */
if (next != NULL && next->track == TRACK_BIT_DEPOT) {
int d = TicksToLeaveDepot(u);
if (d <= 0) {
/* Next vehicle should have left the depot already, show it and pull forward. */
next->vehstatus &= ~VS_HIDDEN;
next->track = TrackToTrackBits(GetRailDepotTrack(next->tile));
for (int i = 0; i >= d; i--) TrainController(next, NULL);
}
}
}
}
}
}
static uint8 _cargo_days;
static uint16 _cargo_source;
static uint32 _cargo_source_xy;