updated observation to cummulate the number of observed agents with same or...

updated observation to cummulate the number of observed agents with same or other direction along each branch

flatland/envs/observations.py

@@ -263,6 +263,9 @@ class TreeObsForRailEnv(ObservationBuilder):
 
         other_agent_encountered = np.inf
         other_target_encountered = np.inf
+        other_agent_same_direction = 0
+        other_agent_opposite_direction = 0
+
 
         num_steps = 1
         while exploring:
@@ -274,6 +277,14 @@ class TreeObsForRailEnv(ObservationBuilder):
                 if num_steps < other_agent_encountered:
                     other_agent_encountered = num_steps
 
+                if self.location_has_agent_direction[position] == direction:
+                    # Cummulate the number of agents on branch with same direction
+                    other_agent_same_direction += 1
+
+                if self.location_has_agent_direction[position] != direction:
+                    # Cummulate the number of agents on branch with other direction
+                    other_agent_opposite_direction += 1
+
             if position in self.location_has_target:
                 if num_steps < other_target_encountered:
                     other_target_encountered = num_steps
@@ -366,10 +377,7 @@ class TreeObsForRailEnv(ObservationBuilder):
                            other_agent_opposite_direction
                            ]
         """
-        other_agent_same_direction = \
-            1 if position in self.location_has_agent and self.location_has_agent_direction[position] == direction else 0
-        other_agent_opposite_direction = \
-            1 if position in self.location_has_agent and self.location_has_agent_direction[position] != direction else 0
+
 
         if last_isTarget:
             observation = [0,