(self, center, radius)
Place Arcball, e.g. when window size changes.

        center : sequence[2]
            Window coordinates of trackball center.
        radius : float
            Radius of trackball in window coordinates.
Place Arcball, e.g. when window size changes.
Place Arcball e . g . when window size changes .
def place(self, center, radius):
        """Place Arcball, e.g. when window size changes.

        center : sequence[2]
            Window coordinates of trackball center.
        radius : float
            Radius of trackball in window coordinates.

        """
        self._radius = float(radius)
        self._center[0] = center[0]
        self._center[1] = center[1]
def place ( self , center , radius ) : self . _radius = float ( radius ) self . _center [ 0 ] = center [ 0 ] self . _center [ 1 ] = center [ 1 ]