Recursively handle ferried bodies

PonderingSystem now recursively ticks bodies, starting with unferried bodies at the top level, and recursively ticking their passengers. This fixes the second issue described in 8f1c4f1 -- that passengers may be ticked before their ferries, causing it to use out-of-date information about the ferry's location.

1 files changed, 5 insertions, 0 deletions

@@ -46,6 +46,11 @@ private:
     id_type groundEntity;
   };
 
+  void tickBody(
+    id_type entity,
+    double dt,
+    const std::set<id_type>& entities);
+
   void processCollision(
     id_type entity,
     id_type collider,