parameters: (self, x, y, dx, dy)
docstring: Pan trackball by a factor dx,dy
docstring_summary: Pan trackball by a factor dx,dy
docstring_tokens: Pan trackball by a factor dx dy
function: def pan_to (self, x, y, dx, dy):
          ''' Pan trackball by a factor dx,dy '''
          self.x += dx*0.1
          self.y += dy*0.1
function_tokens: def pan_to ( self , x , y , dx , dy ) : self . x += dx * 0.1 self . y += dy * 0.1