code: def draw(self, projection_matrix=None, camera_matrix=None, time=0):
          
          projection_matrix = projection_matrix.astype('f4').tobytes()
          camera_matrix = camera_matrix.astype('f4').tobytes()
  
          for node in self.root_nodes:
              node.draw(
                  projection_matrix=projection_matrix,
                  camera_matrix=camera_matrix,
                  time=time,
              )
  
          self.ctx.clear_samplers(0, 4)
docs: Draw all the nodes in the scene
  
          :param projection_matrix: projection matrix (bytes)
          :param camera_matrix: camera_matrix (bytes)
          :param time: The current time