module Trackball_manipulator:Trackball manipulatorsig..end
type t
val create' : unit -> tOsgGA.Matrix_manipulator.tval to_matrix_manipulator : t -> OsgGA.Matrix_manipulator.tOsgGA.Matrix_manipulator.tval get_center : t -> Osg.Vec3.tval get_distance : t -> floatval get_rotation : t -> Osg.Quat.tval create : unit -> OsgGA.Matrix_manipulator.t