Removed state machine for behavior trees

- Added Font Awesome Support

examples/simple_ai_logic/lumberjack.gd

@@ -0,0 +1,102 @@
+extends Node2D
+
+#------------------------------------------
+# Signaux
+#------------------------------------------
+
+#------------------------------------------
+# Exports
+#------------------------------------------
+
+@export_category("Logger")
+
+@export var max_log_capacity:int = 2
+
+#------------------------------------------
+# Variables publiques
+#------------------------------------------
+
+var logs_count:int = 0
+
+#------------------------------------------
+# Variables privées
+#------------------------------------------
+
+@onready var _btroot:BTRoot = $AI
+
+var _cutting_log:bool = false
+var _cutting_tree:Node2D
+
+#------------------------------------------
+# Fonctions Godot redéfinies
+#------------------------------------------
+
+#------------------------------------------
+# Fonctions publiques
+#------------------------------------------
+
+func on_state_entered() :
+    _btroot.on_running.connect(func(s):print(s))
+    _btroot.on_idle.connect(func():print("idle..."))
+    _btroot.enabled = true
+
+func can_carry_more_logs() -> bool:
+    return logs_count < max_log_capacity
+
+func has_no_log() -> bool:
+    return logs_count == 0
+
+func has_remaining_trees() -> bool:
+    return not get_tree().get_nodes_in_group("tree").is_empty()
+
+func get_nearest_tree() -> Node2D:
+    var nearest_tree:Node2D
+    var nearest_distance_to_tree:float = 99999.0
+    for tree in get_tree().get_nodes_in_group("tree"):
+        var distance_to_tree:float = global_position.distance_to(tree.global_position)
+        if distance_to_tree < nearest_distance_to_tree:
+            nearest_distance_to_tree = distance_to_tree
+            nearest_tree = tree
+    return nearest_tree
+
+func get_nearest_warehouse() -> Node2D:
+    var nearest_warehouse:Node2D
+    var nearest_distance_to_warehouse:float = 99999.0
+    for warehouse in get_tree().get_nodes_in_group("warehouse"):
+        var distance_to_warehouse:float = global_position.distance_to(warehouse.global_position)
+        if distance_to_warehouse < nearest_distance_to_warehouse:
+            nearest_distance_to_warehouse = distance_to_warehouse
+            nearest_warehouse = warehouse
+    return nearest_warehouse
+
+func tree_is_valid(tree:Node2D) -> bool:
+    return is_instance_valid(tree) and tree.has_logs()
+
+func cut_log(tree:Node2D) -> int:
+    if not _cutting_log:
+        _cutting_log = true
+        _cutting_tree = tree
+        get_tree().create_timer(1).timeout.connect(_on_log_cut, CONNECT_ONE_SHOT)
+    return BTTickResult.RUNNING if _cutting_log else BTTickResult.FAILURE
+
+func drop_logs_to_warehouse() -> void:
+    logs_count = 0
+
+func move_to(delta:float, node:Node2D) -> int:
+    if global_position.distance_to(node.global_position) > 10:
+        global_position = global_position.move_toward(node.global_position, delta * 300)
+        return BTTickResult.RUNNING
+    else:
+        return BTTickResult.SUCCESS
+
+
+#------------------------------------------
+# Fonctions privées
+#------------------------------------------
+
+func _on_log_cut() -> void:
+    if is_instance_valid(_cutting_tree):
+        _cutting_tree.cut_log()
+        _cutting_tree = null
+        logs_count += 1
+    _cutting_log = false