code: def set_autocamera(self,mode='density'):
          
          self.Camera.set_autocamera(self._Particles,mode=mode)
          self._camera_params = self.Camera.get_params()
          self._x, self._y, self._hsml, self._kview = self.__compute_scene()
          self._m = self._Particles._mass[self._kview]
docs: - set_autocamera(mode='density'): By default, Scene defines its 
          own Camera. However, there is no a general way for doing so. Scene 
          uses a density criterion for getting the point of view. If this is 
          not a good option for your problem, you can choose among:
          |'minmax'|'density'|'median'|'mean'|. If None of the previous methods
          work well, you may define the camera params by yourself.