Started to introduce RUNNING concept

project/scripts/player/tree/BehaviorTree.gd

@@ -26,4 +26,4 @@ func populate_blackboard():
 
 func game_tick() -> void:
     populate_blackboard()
-    behavior_tree.run(blackboard)
+    behavior_tree.internal_run(blackboard)

project/scripts/player/tree/Task.gd

@@ -5,6 +5,21 @@ enum {FAILURE = -1, SUCCESS = 1, RUNNING = 0}
 var status: int = FAILURE
 
 
+func internal_run(p_blackboard: Dictionary) -> void:
+    p_blackboard["current_task"] = self
+
+    if status == RUNNING:
+        for c in self.get_children():
+            if not c.status == RUNNING:
+                continue
+            c.internal_run(p_blackboard)
+            if c.status != SUCCESS:
+                status = c.status
+                return
+
+    run(p_blackboard)
+
+
 func run(p_blackboard: Dictionary) -> void:
     pass
 

project/scripts/player/tree/impl/base/TaskSelector.gd

@@ -3,9 +3,7 @@ extends Task
 
 func run(blackboard: Dictionary) -> void:
     for c in self.get_children():
-        if status == RUNNING and not c.status == RUNNING:
-            continue
-        c.run(blackboard)
+        c.internal_run(blackboard)
         if c.status != FAILURE:
             status = c.status
             return

project/scripts/player/tree/impl/base/TaskSequence.gd

@@ -3,9 +3,7 @@ extends Task
 
 func run(blackboard: Dictionary) -> void:
     for c in self.get_children():
-        if status == RUNNING and not c.status == RUNNING:
-            continue
-        c.run(blackboard)
+        c.internal_run(blackboard)
         if c.status != SUCCESS:
             status = c.status
             return