From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 12 Apr 2014 19:45:27 +0000 (+0300)
Subject: Avoid creating looping routes
X-Git-Url: http://git.tdb.fi/?p=r2c2.git;a=commitdiff_plain;h=54ab7c88976c860ea729e30a175fbc181f0d68cd

Avoid creating looping routes

If th route went past its end, adding the turnout would cause a loop to
be created.  Trying to add the next track would then throw bad_chain.
---

diff --git a/source/libr2c2/trainrouteplanner.cpp b/source/libr2c2/trainrouteplanner.cpp
index 69a3bbe..dbdf293 100644
--- a/source/libr2c2/trainrouteplanner.cpp
+++ b/source/libr2c2/trainrouteplanner.cpp
@@ -85,7 +85,18 @@ void TrainRoutePlanner::create_routes(const RoutingStep &goal)
 				continue;
 
 			Route *route = j->info->routes.front();
-			if(route->has_track(*j->track))
+			bool start_new_route = route->has_track(*j->track);
+			if(!start_new_route)
+			{
+				unsigned nls = j->track->get_n_link_slots();
+				for(unsigned k=0; (!start_new_route && k<nls); ++k)
+				{
+					Track *link = j->track->get_link(k);
+					start_new_route = (link && link!=history[0] && route->has_track(*link));
+				}
+			}
+
+			if(start_new_route)
 			{
 				route = new Route(j->info->train->get_layout());
 				route->set_name("Router");