Add: station variable 6C for wider ID detection

src/newgrf_roadstop.cpp

@@ -199,6 +199,17 @@ uint32_t RoadStopScopeResolver::GetVariable(uint8_t variable, [[maybe_unused]] u
 			return 0xFFFE;
 		}
 
+		/* 16 bit road stop ID of nearby tiles, without GRFID check */
+		case 0x6C: {
+			TileIndex nearby_tile = GetNearbyTile(parameter, this->tile);
+
+			if (!IsAnyRoadStopTile(nearby_tile)) return 0xFFFFFFFF;
+			if (!IsCustomRoadStopSpecIndex(nearby_tile)) return 0xFFFE;
+
+			const auto &sm = BaseStation::GetByTile(nearby_tile)->roadstop_speclist[GetCustomRoadStopSpecIndex(nearby_tile)];
+			return sm.localidx;
+		}
+
 		case 0xF0: return this->st == nullptr ? 0 : this->st->facilities; // facilities
 
 		case 0xFA: return ClampTo<uint16_t>((this->st == nullptr ? TimerGameCalendar::date : this->st->build_date) - CalendarTime::DAYS_TILL_ORIGINAL_BASE_YEAR); // build date

src/newgrf_station.cpp

@@ -393,6 +393,16 @@ TownScopeResolver *StationResolverObject::GetTown()
 			return 0xFFFE;
 		}
 
+		case 0x6C: { // 16 bit Station ID of nearby tiles, without GRFID check
+			TileIndex nearby_tile = GetNearbyTile(parameter, this->tile);
+
+			if (!HasStationTileRail(nearby_tile)) return 0xFFFFFFFF;
+			if (!IsCustomStationSpecIndex(nearby_tile)) return 0xFFFE;
+
+			const auto &sm = BaseStation::GetByTile(nearby_tile)->speclist[GetCustomStationSpecIndex(nearby_tile)];
+			return sm.localidx;
+		}
+
 		/* General station variables */
 		case 0x82: return 50;
 		case 0x84: return this->st->string_id;

src/table/newgrf_debug_data.h

@@ -132,6 +132,7 @@ static const NIVariable _niv_stations[] = {
 	NIV(0x69, "information about cargo accepted in the past"),
 	NIV(0x6A, "GRFID of nearby station tiles"),
 	NIV(0x6B, "station ID of nearby tiles"),
+	NIV(0x6C, "station ID of nearby tiles even if not from the same GRF"),
 	NIV_END()
 };
 
@@ -691,6 +692,7 @@ static const NIVariable _nif_roadstops[] = {
 	NIV(0x69, "information about cargo accepted in the past"),
 	NIV(0x6A, "GRFID of nearby road stop tiles"),
 	NIV(0x6B, "road stop ID of nearby tiles"),
+	NIV(0x6C, "road stop ID of nearby tiles even if not from the same GRF"),
 	NIV_END(),
 };