<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def points(self):
 """ The center of each filled cell as a list of points. Returns points: (self.filled, 3) float, list of points """

        points = matrix_to_points(matrix=self.matrix,
                                  pitch=self.pitch,
                                  origin=self.origin)
        return points