Added region-stepped origin.

scripts/aircraft/nodes/fixed_wing_aircraft.gd

@@ -17,6 +17,8 @@ var m_relative_velocity: Vector3
 
 var m_is_landed := false
 
+@onready var m_region_transform: RegionTransform = $RegionTransform
+
 func _ready() -> void:
     velocity = -global_basis.z * initial_speed
     m_relative_velocity = transform.basis.inverse() * velocity
@@ -77,6 +79,7 @@ func _physics_process(delta: float) -> void:
         rotate_object_local(steering_axis.normalized(), steering_axis.length())
     
     move_and_slide()
+    m_region_transform.sync_from_transform()
     #if !is_landed:
     #    _fly()
     #else: