def projectSphereFilter(actor):
    """
    Project a spherical-like object onto a plane.

    .. hint:: |projectsphere| |projectsphere.py|_
    """
    poly = actor.polydata()
    psf = vtk.vtkProjectSphereFilter()
    psf.SetInputData(poly)
    psf.Update()
    a = Actor(psf.GetOutput())
    return a
Project a spherical-like object onto a plane.

    .. hint:: |projectsphere| |projectsphere.py|_