(svn r11908) -Fix: update crossing when merging a company, when building a crossing and after loading older savegame

src/economy.cpp

@@ -41,6 +41,7 @@
 #include "sound_func.h"
 #include "track_type.h"
 #include "track_func.h"
+#include "road_func.h"
 #include "rail_map.h"
 #include "signal_func.h"
 #include "gfx_func.h"
@@ -432,7 +433,9 @@ void ChangeOwnershipOfPlayerItems(PlayerID old_player, PlayerID new_player)
 
 		if (new_player != PLAYER_SPECTATOR) {
 			/* Update all signals because there can be new segment that was owned by two players
-			 * and signals were not propagated */
+			 * and signals were not propagated
+			 * Similiar with crossings - it is needed to bar crossings that weren't before
+			 * because of different owner of crossing and approaching train */
 			tile = 0;
 
 			do {
@@ -442,6 +445,8 @@ void ChangeOwnershipOfPlayerItems(PlayerID old_player, PlayerID new_player)
 						Track track = RemoveFirstTrack(&tracks);
 						if (HasSignalOnTrack(tile, track)) AddTrackToSignalBuffer(tile, track, new_player);
 					} while (tracks != TRACK_BIT_NONE);
+				} else if (IsLevelCrossingTile(tile) && IsTileOwner(tile, new_player)) {
+					UpdateLevelCrossing(tile);
 				}
 			} while (++tile != MapSize());
 

src/openttd.cpp

@@ -65,6 +65,7 @@
 #include "vehicle_func.h"
 #include "sound_func.h"
 #include "variables.h"
+#include "road_func.h"
 
 #include "bridge_map.h"
 #include "clear_map.h"
@@ -2313,6 +2314,13 @@ bool AfterLoadGame()
 		}
 	}
 
+	if (CheckSavegameVersion(86)) {
+		/* Now all crossings should be in correct state */
+		for (TileIndex t = 0; t < map_size; t++) {
+			if (IsLevelCrossingTile(t)) UpdateLevelCrossing(t);
+		}
+	}
+
 	return InitializeWindowsAndCaches();
 }
 

src/rail_cmd.cpp

@@ -383,6 +383,7 @@ CommandCost CmdBuildSingleRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p
 						(track == TRACK_Y && road == ROAD_X)) {
 					if (flags & DC_EXEC) {
 						MakeRoadCrossing(tile, GetRoadOwner(tile, ROADTYPE_ROAD), GetRoadOwner(tile, ROADTYPE_TRAM), GetRoadOwner(tile, ROADTYPE_HWAY), _current_player, (track == TRACK_X ? AXIS_Y : AXIS_X), railtype, roadtypes, GetTownIndex(tile));
+						UpdateLevelCrossing(tile);
 					}
 					break;
 				}

src/road_cmd.cpp

@@ -32,6 +32,7 @@
 #include "vehicle_func.h"
 #include "vehicle_base.h"
 #include "sound_func.h"
+#include "road_func.h"
 
 #include "table/sprites.h"
 #include "table/strings.h"
@@ -486,6 +487,7 @@ CommandCost CmdBuildRoad(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 				YapfNotifyTrackLayoutChange(tile, FindFirstTrack(GetTrackBits(tile)));
 				/* Always add road to the roadtypes (can't draw without it) */
 				MakeRoadCrossing(tile, _current_player, _current_player, _current_player, GetTileOwner(tile), roaddir, GetRailType(tile), RoadTypeToRoadTypes(rt) | ROADTYPES_ROAD, p2);
+				UpdateLevelCrossing(tile);
 				MarkTileDirtyByTile(tile);
 			}
 			return CommandCost(EXPENSES_CONSTRUCTION, _price.build_road * (rt == ROADTYPE_ROAD ? 2 : 4));
@@ -1343,11 +1345,9 @@ static VehicleEnterTileStatus VehicleEnter_Road(Vehicle *v, TileIndex tile, int
 {
 	switch (GetRoadTileType(tile)) {
 		case ROAD_TILE_CROSSING:
-			if (v->type == VEH_TRAIN && !IsCrossingBarred(tile)) {
-				/* train crossing a road */
-				SndPlayVehicleFx(SND_0E_LEVEL_CROSSING, v);
-				BarCrossing(tile);
-				MarkTileDirtyByTile(tile);
+			if (v->type == VEH_TRAIN) {
+				/* it should be barred */
+				assert(IsCrossingBarred(tile));
 			}
 			break;
 

src/road_func.h

@@ -136,4 +136,6 @@ bool ValParamRoadType(const RoadType rt);
  */
 RoadTypes GetPlayerRoadtypes(const PlayerID p);
 
+void UpdateLevelCrossing(TileIndex tile);
+
 #endif /* ROAD_FUNC_H */

src/train_cmd.cpp

@@ -1685,7 +1685,7 @@ static Vehicle *TrainApproachingCrossing(TileIndex tile)
  * @param tile tile to update
  * @pre tile is a rail-road crossing
  */
-void UpdateTrainCrossing(TileIndex tile)
+void UpdateLevelCrossing(TileIndex tile)
 {
 	assert(IsLevelCrossingTile(tile));
 
@@ -1773,11 +1773,11 @@ static void ReverseTrainDirection(Vehicle *v)
 	ClrBit(v->u.rail.flags, VRF_REVERSING);
 
 	/* update crossing we were approaching */
-	if (crossing != INVALID_TILE) UpdateTrainCrossing(crossing);
+	if (crossing != INVALID_TILE) UpdateLevelCrossing(crossing);
 
 	/* maybe we are approaching crossing now, after reversal */
 	crossing = TrainApproachingCrossingTile(v);
-	if (crossing != INVALID_TILE) UpdateTrainCrossing(crossing);
+	if (crossing != INVALID_TILE) UpdateLevelCrossing(crossing);
 }
 
 /** Reverse train.
@@ -2856,7 +2856,7 @@ static void SetVehicleCrashed(Vehicle *v)
 	END_ENUM_WAGONS(v)
 
 	/* must be updated after the train has been marked crashed */
-	if (crossing != INVALID_TILE) UpdateTrainCrossing(crossing);
+	if (crossing != INVALID_TILE) UpdateLevelCrossing(crossing);
 }
 
 static uint CountPassengersInTrain(const Vehicle* v)
@@ -3148,7 +3148,7 @@ static void TrainController(Vehicle *v, bool update_image)
 			 * (above) or the last vehicle moves. */
 			if (v->Next() == NULL) {
 				TrainMovedChangeSignals(gp.old_tile, ReverseDiagDir(enterdir));
-				if (IsLevelCrossingTile(gp.old_tile)) UpdateTrainCrossing(gp.old_tile);
+				if (IsLevelCrossingTile(gp.old_tile)) UpdateLevelCrossing(gp.old_tile);
 			}
 		}
 	}
@@ -3211,7 +3211,7 @@ static void DeleteLastWagon(Vehicle *v)
 	v = NULL; // make sure nobody will won't try to read 'v' anymore
 
 	/* check if the wagon was on a road/rail-crossing */
-	if (IsLevelCrossingTile(tile)) UpdateTrainCrossing(tile);
+	if (IsLevelCrossingTile(tile)) UpdateLevelCrossing(tile);
 
 	/* Update signals */
 	if (IsTileType(tile, MP_TUNNELBRIDGE) || IsTileDepotType(tile, TRANSPORT_RAIL)) {