# This function should be called whenever the character moves.
func update_camera(character_pos):
    var new_camera_pos = self.get_global_pos()

    # Check if the character reaches the right margin.
    if character_pos.x > self.get_global_pos().x + screen_size.width * (drag_margin_right - 0.5):
        new_camera_pos.x = character_pos.x - screen_size.width * (drag_margin_right - 0.5)

    # Check if the character reaches the left margin.
    elif character_pos.x < self.get_global_pos().x + screen_size.width * (drag_margin_left - 0.5):
		# Character reaches the left drag margin.
        new_camera_pos.x = character_pos.x + screen_size.width * (0.5 - drag_margin_left)

    # Clamp the new camera position within the limits.
	  new_camera_pos.x = clamp(new_camera_pos.x, left_limit + screen_size.width * 0.5, right_limit - screen_size.width * 0.5)
    new_camera_pos.y = clamp(new_camera_pos.y, top_limit + screen_size.height * 0.5, bottom_limit - screen_size.height * 0.5)

    # Actually update the position of the camera.
    self.set_global_pos(new_camera_pos)