The marker's rotation. The rotation is
counterclockwise and defined in radians. The default is zero.
Assembly: AGI.Graphics.Scene3D.Interop(Module: AGI.Graphics.Scene3D.Interop) Version: 9.0.0.0 (9.0.0.0)
Assembly: AGI.Graphics.Scene3D.Interop(Module: AGI.Graphics.Scene3D.Interop) Version: 9.0.0.0 (9.0.0.0)