parameters: (self, center, radius)
docstring: Place Arcball, e.g. when window size changes.
  
          center : sequence[2]
              Window coordinates of trackball center.
          radius : float
              Radius of trackball in window coordinates.
docstring_summary: Place Arcball, e.g. when window size changes.
docstring_tokens: Place Arcball e . g . when window size changes .
function: 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]
function_tokens: def place ( self , center , radius ) : self . _radius = float ( radius ) self . _center [ 0 ] = center [ 0 ] self . _center [ 1 ] = center [ 1 ]