X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Flibr2c2%2Ftrainrouter.cpp;h=bbb87eae116eb56326c911900eec1f0d09fe9303;hb=bf321305d7bf65aa5033a835f61370cd48f54619;hp=8cfedee8f28623013cfa719f436704ec2963af5f;hpb=ca9d278f9472206ad9a01190dcef9f0eb1bcc274;p=r2c2.git

diff --git a/source/libr2c2/trainrouter.cpp b/source/libr2c2/trainrouter.cpp
index 8cfedee..bbb87ea 100644
--- a/source/libr2c2/trainrouter.cpp
+++ b/source/libr2c2/trainrouter.cpp
@@ -2,9 +2,10 @@
 #include "route.h"
 #include "trackiter.h"
 #include "train.h"
+#include "trackchain.h"
+#include "trainroutemetric.h"
 #include "trainrouteplanner.h"
 #include "trainrouter.h"
-#include "zone.h"
 
 using namespace std;
 using namespace Msp;
@@ -14,13 +15,22 @@ namespace R2C2 {
 TrainRouter::TrainRouter(Train &t):
 	TrainAI(t),
 	priority(0),
-	arriving(false),
-	dest_zone(0),
-	dest_block(0),
-	update_pending(false)
+	arrival(ON_THE_WAY),
+	destination(0),
+	destination_changed(false),
+	metrics_stale(false),
+	current_sequence(0),
+	sequence_check_pending(false)
 {
 	train.get_layout().signal_block_reserved.connect(sigc::mem_fun(this, &TrainRouter::block_reserved));
 	train.signal_advanced.connect(sigc::mem_fun(this, &TrainRouter::train_advanced));
+	train.signal_rear_advanced.connect(sigc::mem_fun(this, &TrainRouter::train_rear_advanced));
+}
+
+TrainRouter::~TrainRouter()
+{
+	for(vector<TrainRouteMetric *>::iterator i=metrics.begin(); i!=metrics.end(); ++i)
+		delete *i;
 }
 
 void TrainRouter::set_priority(int p)
@@ -30,14 +40,14 @@ void TrainRouter::set_priority(int p)
 
 bool TrainRouter::set_route(const Route *r)
 {
-	train.free_noncritical_blocks();
+	BlockIter fncb = train.get_first_noncritical_block();
 
 	Route *lead = 0;
 	if(r && train.is_placed())
 	{
 		const BlockAllocator &allocator = train.get_block_allocator();
 		TrackIter first = allocator.first().track_iter();
-		TrackIter next = allocator.last().next().track_iter();
+		TrackIter next = fncb.track_iter();
 		if(!r->has_track(*next))
 		{
 			lead = Route::find(next, *r);
@@ -52,28 +62,21 @@ bool TrainRouter::set_route(const Route *r)
 	routes.clear();
 	if(lead)
 		routes.push_back(lead);
+	// TODO Check if eclipsed by lead route
 	if(r)
 		routes.push_back(r);
-	train.stop_at(0);
-	arriving = false;
 
-	train.reserve_more();
+	destination = 0;
+	waypoints.clear();
+	sequence_points.clear();
+	current_sequence = 0;
+	sequence_check_pending = false;
 
-	const Route *route = get_route();
-	signal_route_changed.emit(route);
-	signal_event.emit(Message("route-changed", route));
+	route_changed();
 
 	return true;
 }
 
-void TrainRouter::add_wait(Block &block, Train *tr)
-{
-	Wait wait;
-	wait.block = &block;
-	wait.train = tr;
-	waits.push_back(wait);
-}
-
 const Route *TrainRouter::get_route() const
 {
 	if(routes.empty())
@@ -81,35 +84,103 @@ const Route *TrainRouter::get_route() const
 	return routes.front();
 }
 
-void TrainRouter::set_destination(const Zone &zone)
+void TrainRouter::route_changed()
 {
-	dest_zone = &zone;
-	dest_block = 0;
-	update_pending = true;
-}
+	BlockIter fncb = train.get_first_noncritical_block();
 
-void TrainRouter::set_destination(const Block &block)
-{
-	dest_zone = 0;
-	dest_block = &block;
-	update_pending = true;
+	reserving_route = routes.begin();
+	bool already_at_end = false;
+	if(!routes.empty())
+	{
+		/* Find the route that should be used for the next allocated block.  We
+		can't rely on the resync code in block_reserved since we may need to
+		clear the stop marker to continue allocation. */
+		TrackIter track = train.get_block_allocator().first().track_iter();
+		for(; track; track=track.next())
+		{
+			if(!advance_to_track(reserving_route, *track))
+			{
+				already_at_end = true;
+				break;
+			}
+			if(&track->get_block()==fncb.block())
+				break;
+		}
+	}
+
+	if(!already_at_end)
+	{
+		// We are not at the end of the route now, but might have been before.
+		arrival = ON_THE_WAY;
+		train.refresh_blocks_from(*fncb);
+		if(!arrival)
+			train.stop_at(0);
+	}
+	else if(!arrival)
+	{
+		/* If arrival wasn't set before (perhaps because we weren't on a route),
+		set it now. */
+		arrival = RESERVED_TO_END;
+		train.stop_at(&*fncb.flip());
+		train.refresh_blocks_from(*fncb);
+	}
+
+	const Route *route = get_route();
+	signal_route_changed.emit(route);
+	signal_event.emit(Message("route-changed", route));
 }
 
-bool TrainRouter::has_destination() const
+void TrainRouter::set_destination(const TrackChain &d)
 {
-	return dest_zone || dest_block;
+	destination = &d;
+	destination_changed = true;
+	metrics_stale = true;
 }
 
 bool TrainRouter::is_destination(Track &track) const
 {
-	if(dest_zone)
-		return dest_zone->has_track(track);
-	else if(dest_block)
-		return dest_block->has_track(track);
+	if(destination)
+		return destination->has_track(track);
 	else
 		return false;
 }
 
+void TrainRouter::add_waypoint(const TrackChain &wp)
+{
+	waypoints.push_back(&wp);
+	destination_changed = true;
+	metrics_stale = true;
+}
+
+bool TrainRouter::is_waypoint(unsigned index, Track &track) const
+{
+	if(index>=waypoints.size())
+		throw out_of_range("TrainRouter::is_waypoint");
+
+	return waypoints[index]->has_track(track);
+}
+
+const TrainRouteMetric &TrainRouter::get_metric(int index) const
+{
+	if(!destination)
+		throw logic_error("no metrics");
+	else if(metrics_stale)
+		throw logic_error("metrics are stale");
+
+	if(index<0)
+		return *metrics.front();
+	else if(static_cast<unsigned>(index)>=waypoints.size())
+		throw out_of_range("TrainRouter::get_metric");
+	else
+		return *metrics[index+1];
+}
+
+void TrainRouter::set_departure_delay(const Time::TimeDelta &d)
+{
+	delay = d;
+	destination_changed = true;
+}
+
 void TrainRouter::message(const Message &msg)
 {
 	if(msg.type=="set-route")
@@ -121,34 +192,83 @@ void TrainRouter::message(const Message &msg)
 	}
 	else if(msg.type=="clear-route")
 		set_route(0);
-	else if(msg.type=="set-destination-block")
+	else if(msg.type=="set-destination")
 	{
-		if(msg.value.check_type<Block *>())
-			set_destination(*msg.value.value<Block *>());
+		if(msg.value.check_type<TrackChain *>())
+			set_destination(*msg.value.value<TrackChain *>());
 		else
-			set_destination(*msg.value.value<const Block *>());
+			set_destination(*msg.value.value<const TrackChain *>());
 	}
-	else if(msg.type=="set-destination-zone")
+	else if(msg.type=="add-waypoint")
 	{
-		if(msg.value.check_type<Zone *>())
-			set_destination(*msg.value.value<Zone *>());
+		if(msg.value.check_type<TrackChain *>())
+			add_waypoint(*msg.value.value<TrackChain *>());
 		else
-			set_destination(*msg.value.value<const Zone *>());
+			add_waypoint(*msg.value.value<const TrackChain *>());
 	}
+	else if(msg.type=="set-departure-delay")
+		set_departure_delay(msg.value.value<Time::TimeDelta>());
 }
 
-void TrainRouter::tick(const Time::TimeStamp &, const Time::TimeDelta &)
+void TrainRouter::tick(const Time::TimeDelta &dt)
 {
-	if(update_pending)
-		create_plans(train.get_layout());
+	if(delay)
+	{
+		delay -= dt;
+		if(delay<=Time::zero)
+			delay = Time::zero;
+	}
+
+	if(destination_changed && !planner)
+		start_planning(train.get_layout());
 
-	if(arriving && !train.get_speed())
+	if(planner && planner->check()!=TrainRoutePlanner::PENDING)
 	{
-		train.set_active(false);
-		signal_arrived.emit();
-		signal_event.emit(Message("arrived"));
-		set_route(0);
+		destination_changed = false;
+		if(planner->get_result()==TrainRoutePlanner::COMPLETE)
+		{
+			const list<Route *> &planned_routes = planner->get_routes_for(train);
+
+			routes.clear();
+			Route *lead = create_lead_route(0, planned_routes.front());
+			routes.push_back(lead);
+
+			list<Route *>::const_iterator begin = planned_routes.begin();
+			for(; begin!=planned_routes.end(); ++begin)
+			{
+				const Route::TrackSet &tracks = (*begin)->get_tracks();
+				bool eclipsed = true;
+				for(Route::TrackSet::const_iterator i=tracks.begin(); (eclipsed && i!=tracks.end()); ++i)
+					eclipsed = lead->has_track(**i);
+				if(!eclipsed)
+					break;
+			}
+			routes.insert(routes.end(), begin, planned_routes.end());
+
+			sequence_points = planner->get_sequence_for(train);
+			current_sequence = 0;
+			sequence_check_pending = false;
+
+			route_changed();
+		}
+		planner = 0;
+	}
+
+	if(sequence_check_pending)
+	{
+		if(sequence_points.front().is_cleared())
+			train.stop_at(0);
+		sequence_check_pending = false;
+	}
+
+	if(arrival==RESERVED_TO_END && !train.get_speed())
+	{
+		signal_arrived.emit(destination);
+		signal_event.emit(Message("arrived", destination));
+		arrival = ARRIVED;
 	}
+	else if(arrival==ARRIVED && !train.get_block_allocator().is_active())
+		set_route(0);
 }
 
 void TrainRouter::save(list<DataFile::Statement> &st) const
@@ -166,78 +286,146 @@ void TrainRouter::save(list<DataFile::Statement> &st) const
 
 void TrainRouter::block_reserved(Block &block, Train *t)
 {
+	if(routes.empty())
+		return;
+
 	if(t!=&train)
 	{
-		if(!waits.empty() && waits.front().block==&block)
+		if(!t)
+			return;
+
+		// Are we waiting for the other train to pass a sequence point?
+		SequencePoint &sp = sequence_points.front();
+		if(sp.preceding_train==t && sp.block==&block)
+			/* The other train's router will advance its sequence on the same
+			signal and may not have handled it yet. */
+			sequence_check_pending = true;
+
+		return;
+	}
+
+	// Did we reach our next sequence point?
+	if(!sequence_points.empty())
+	{
+		SequencePoint &sp = sequence_points.front();
+		if(sp.block==&block)
 		{
-			train.stop_at(0);
-			waits.pop_front();
+			current_sequence = sp.sequence_out;
+			sequence_points.pop_front();
 		}
-		return;
 	}
 
-	BlockIter b_iter(&block, t->get_block_allocator().get_entry_to_block(block));
+	TrackIter track = train.get_block_allocator().iter_for(block).track_iter();
+
+	// Is the block a turnout?  If it is, set it to the correct path.
+	if(unsigned taddr = block.get_turnout_address())
+	{
+		int path = (*reserving_route)->get_turnout(taddr);
+		if(path>=0)
+			track->set_active_path(path);
+	}
 
-	RouteList::iterator route = routes.begin();
-	if(advance_route(route, block))
+	/* If the allocator has released blocks from the front, we may need to
+	resync reserving_route. */
+	if(reserving_route==routes.end() || !(*reserving_route)->has_track(*track))
 	{
-		// Check if the block is a turnout and set it to proper path
-		if(unsigned tid = block.get_turnout_id())
+		reserving_route = routes.begin();
+		arrival = ON_THE_WAY;
+		track = t->get_block_allocator().first().track_iter();
+		for(; track; track=track.next())
 		{
-			int path = (*route)->get_turnout(tid);
-			if(path>=0)
-				b_iter.track_iter()->set_active_path(path);
+			if(!advance_to_track(reserving_route, *track))
+				throw logic_error("internal error (reservation outside of route)");
+			else if(&track->get_block()==&block)
+				break;
 		}
+	}
 
-		// Check if the next block is still part of the designated route
-		BlockIter b_iter_next = b_iter.next(*route);
-
-		RouteList::iterator next_route = route;
-		if(!advance_route(next_route, *b_iter_next))
+	/* Keep reserving_route pointing to the route containing the block that is
+	expected to be allocated next. */
+	for(; track; track=track.next((*reserving_route)->get_path(*track)))
+	{
+		if(!advance_to_track(reserving_route, *track))
 		{
+			// We've reached the end of the route.  Stop here.
+			arrival = RESERVED_TO_END;
 			train.stop_at(&block);
 			return;
 		}
+		if(&track->get_block()!=&block)
+			break;
+	}
 
-		if(!waits.empty() && waits.front().block==b_iter_next.block())
+	// Do we need to wait for another train to pass?
+	if(!sequence_points.empty())
+	{
+		SequencePoint &sp = sequence_points.front();
+		if(sp.block==&track->get_block() && !sp.is_cleared())
 			train.stop_at(&block);
 	}
 }
 
 void TrainRouter::train_advanced(Block &block)
 {
-	// Check if we've reached the next route
-	if(routes.size()>1)
+	BlockIter b_iter = train.get_block_allocator().iter_for(block);
+
+	if(!waypoints.empty())
 	{
-		unsigned entry = train.get_block_allocator().get_entry_to_block(block);
-		Track &track = *block.get_endpoint(entry).track;
-		const Route &route = **++routes.begin();
-		if(route.has_track(track))
+		// A waypoint is considered reached when the train has advanced through it.
+		const TrackChain &wp = *waypoints.front();
+		TrackIter t_iter = b_iter.track_iter();
+		if(wp.has_track(*t_iter))
 		{
-			routes.pop_front();
-			// XXX Exceptions?
-			signal_event.emit(Message("route-changed", get_route()));
+			for(; t_iter; t_iter=t_iter.next())
+			{
+				if(!wp.has_track(*t_iter))
+				{
+					waypoints.erase(waypoints.begin());
+					signal_waypoint_reached.emit(&wp);
+					signal_event.emit(Message("waypoint-reached", &wp));
+					break;
+				}
+				else if(!block.has_track(*t_iter))
+					break;
+			}
 		}
 	}
+}
 
-	if(!routes.empty())
-	{
-		BlockIter iter(&block, train.get_block_allocator().get_entry_to_block(block));
-		iter = iter.next();
-		if(iter && !is_on_route(*iter))
-			arriving = true;
-	}
+void TrainRouter::train_rear_advanced(Block &block)
+{
+	Track &track = *train.get_block_allocator().iter_for(block).endpoint().track;
+
+	// Drop any routes that are now completely behind the train.
+	for(RouteList::iterator i=routes.begin(); i!=routes.end(); ++i)
+		if((*i)->has_track(track))
+		{
+			if(i!=routes.begin())
+			{
+				routes.erase(routes.begin(), i);
+				const Route *route = get_route();
+				signal_route_changed.emit(route);
+				signal_event.emit(Message("route-changed", route));
+			}
+			break;
+		}
 }
 
-const Route *TrainRouter::get_route_for_block(const Block &block) const
+void TrainRouter::create_metrics()
 {
-	const set<Track *> &tracks = block.get_tracks();
-	for(RouteList::const_iterator i=routes.begin(); i!=routes.end(); ++i)
-		for(set<Track *>::const_iterator j=tracks.begin(); j!=tracks.end(); ++j)
-			if((*i)->has_track(**j))
-				return *i;
+	for(vector<TrainRouteMetric *>::iterator i=metrics.begin(); i!=metrics.end(); ++i)
+		delete *i;
+	metrics.clear();
+
+	if(!destination)
+		return;
 
-	return 0;
+	metrics.push_back(new TrainRouteMetric(*destination));
+	for(vector<const TrackChain *>::const_iterator i=waypoints.begin(); i!=waypoints.end(); ++i)
+		metrics.push_back(new TrainRouteMetric(**i));
+
+	for(unsigned i=metrics.size(); --i>0; )
+		metrics[i]->chain_to(*metrics[(i+1)%metrics.size()]);
 }
 
 Route *TrainRouter::create_lead_route(Route *lead, const Route *target)
@@ -249,54 +437,83 @@ Route *TrainRouter::create_lead_route(Route *lead, const Route *target)
 		lead->set_temporary(true);
 	}
 
-	set<Track *> tracks;
-	for(BlockIter i=train.get_block_allocator().first(); (i && i->get_train()==&train); i=i.next())
+	bool target_tracks = 0;
+	for(TrackIter i=train.get_block_allocator().first().track_iter(); (target_tracks<2 && i); i=i.next())
 	{
-		const set<Track *> &btracks = i->get_tracks();
-		for(set<Track *>::const_iterator j=btracks.begin(); j!=btracks.end(); ++j)
-			if(!target || !target->has_track(**j))
-				tracks.insert(*j);
+		if(i->get_block().get_train()!=&train)
+			break;
+		if(target)
+		{
+			if(target->has_track(*i))
+				++target_tracks;
+			else if(target_tracks>0)
+				break;
+		}
+		lead->add_track(*i);
 	}
 
-	lead->add_tracks(tracks);
-
 	return lead;
 }
 
-bool TrainRouter::advance_route(RouteList::iterator &iter, const Block &block)
+bool TrainRouter::is_valid_for_track(const Route &route, Track &track) const
 {
-	const set<Track *> &tracks = block.get_tracks();
-	for(; iter!=routes.end(); ++iter)
-		for(set<Track *>::const_iterator j=tracks.begin(); j!=tracks.end(); ++j)
-			if((*iter)->has_track(**j))
-				return true;
-
-	return false;
+	if(!route.has_track(track))
+		return false;
+	if(track.get_type().is_turnout() && route.get_turnout(track.get_turnout_address())<0)
+		return false;
+	return true;
 }
 
-bool TrainRouter::is_on_route(const Block &block)
+bool TrainRouter::advance_to_track(RouteList::iterator &route, Track &track)
 {
-	RouteList::iterator iter = routes.begin();
-	return advance_route(iter, block);
+	if(!is_valid_for_track(**route, track))
+	{
+		++route;
+		if(route==routes.end())
+			return false;
+		if(!is_valid_for_track(**route, track))
+			throw logic_error("internal error (routes are not continuous)");
+	}
+
+	return true;
 }
 
-void TrainRouter::create_plans(Layout &layout)
+void TrainRouter::start_planning(Layout &layout)
 {
-	TrainRoutePlanner planner(layout);
-	planner.plan();
+	RefPtr<TrainRoutePlanner> planner = new TrainRoutePlanner(layout);
 
 	const map<unsigned, Train *> &trains = layout.get_trains();
 	for(map<unsigned, Train *>::const_iterator i=trains.begin(); i!=trains.end(); ++i)
 		if(TrainRouter *router = i->second->get_ai_of_type<TrainRouter>())
-			router->update_pending = false;
+		{
+			if(router->metrics_stale)
+			{
+				router->create_metrics();
+				router->metrics_stale = false;
+			}
+			router->planner = planner;
+		}
+
+	planner->plan_async();
 }
 
 
-TrainRouter::Wait::Wait():
-	block(0),
-	train(0)
+TrainRouter::SequencePoint::SequencePoint(Block &b, unsigned o):
+	block(&b),
+	preceding_train(0),
+	sequence_in(0),
+	sequence_out(o)
 { }
 
+bool TrainRouter::SequencePoint::is_cleared() const
+{
+	if(!preceding_train)
+		return true;
+
+	TrainRouter *router = preceding_train->get_ai_of_type<TrainRouter>();
+	return router->get_current_sequence()>=sequence_in;
+}
+
 
 TrainRouter::Loader::Loader(TrainRouter &r):
 	DataFile::ObjectLoader<TrainRouter>(r)