Make it possible to dynamically set weapon parans

scenes/weapon/generic_weapon_controller.gd

@@ -0,0 +1,41 @@
+extends Node3D
+
+# ---------------------------------------------------------------------
+# Main weapon params
+# ---------------------------------------------------------------------
+@export var damage: int = 0
+# cooldown interval in seconds
+@export var cooldown: float = 0
+# bullet speed in m/s
+@export var bullet_speed: int = 0
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	pass # Replace with function body.
+@onready var bullet_trace_distance: Node3D = $BulletTraceDistance
+@onready var bullet_trail_end: Node3D = $BulletTrailEnd
+
+func shoot() -> Error:
+	var bullet_start_node: Node3D = bullet_trace_distance.find_child("Start")
+	var bullet_end_node: Node3D = bullet_trace_distance.find_child("End")
+	if bullet_start_node and bullet_end_node:
+		var path := "res://scenes/weapon/misc/bullet_trail_generic.tscn"
+		if not ResourceLoader.exists(path):
+			return ERR_DOES_NOT_EXIST
+		var scene: PackedScene = ResourceLoader.load(path)
+		if not scene.can_instantiate():
+			return ERR_CANT_OPEN
+		
+		var node: MeshInstance3D = scene.instantiate()
+		node.init(bullet_start_node.position, bullet_end_node.position)
+		#var root := get_tree().get_root()
+		bullet_start_node.add_child(node)
+		return OK
+	else:
+		push_warning("Couldn't generate a bullet trace, no distance node found")
+		return ERR_BUG
+	# -- TODO: It should not be hardcoded
+	
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	pass