Repository: ManimCommunity/manim
File: manim/mobject/mobject.py (Python)

Code before:
        """Get center coordinates"""
        return self.get_critical_point(np.zeros(self.dim))

    def get_center_of_mass(self):
        return np.apply_along_axis(np.mean, 0, self.get_all_points())

    def get_boundary_point(self, direction):
        all_points = self.get_points_defining_boundary()
        index = np.argmax(np.dot(all_points, np.array(direction).T))
        return all_points[index]

    def get_midpoint(self) -> np.ndarray:
        """Get coordinates of the middle of the path that forms the  :class:`~.Mobject`
        Examples
        --------

        .. manim:: AngleMidPoint
            :save_last_frame:

            class AngleMidPoint(Scene):
                def construct(self):
                    line1 = Line(ORIGIN, 2*RIGHT)
                    line2 = Line(ORIGIN, 2*RIGHT).rotate_about_origin(80*DEGREES)

                    a = Angle(line1, line2, radius=1.5, other_angle=False)
                    d=Dot(a.get_midpoint()).set_color(RED)

                    self.add(line1, line2, a, d)
                    self.wait()

        """
        return self.point_from_proportion(0.5)

    def get_top(self) -> np.ndarray:
        """Get top coordinates of a box bounding the :class:`~.Mobject`"""
        return self.get_edge_center(UP)

    def get_bottom(self) -> np.ndarray:
        """Get bottom coordinates of a box bounding the :class:`~.Mobject`"""
        return self.get_edge_center(DOWN)

    def get_right(self) -> np.ndarray:
        """Get right coordinates of a box bounding the :class:`~.Mobject`"""
        return self.get_edge_center(RIGHT)

    def get_left(self) -> np.ndarray:
        """Get left coordinates of a box bounding the :class:`~.Mobject`"""
        return self.get_edge_center(LEFT)

    def get_zenith(self):
        return self.get_edge_center(OUT)

Review comment (suggestion):
```suggestion
                    d = Dot(a.get_midpoint()).set_color(RED)
```

Code after:
        values = points[:, dim]
        if key < 0:
            return np.min(values)
        elif key == 0:
            return (np.min(values) + np.max(values)) / 2
        else:
            return np.max(values)

    def get_critical_point(self, direction):
        """Picture a box bounding the :class:`~.Mobject`.  Such a box has
        9 'critical points': 4 corners, 4 edge center, the
        center. This returns one of them, along the given direction.

        ::

            sample = Arc(start_angle=PI/7, angle = PI/5)

            # These are all equivalent
            max_y_1 = sample.get_top()[1]
            max_y_2 = sample.get_critical_point(UP)[1]
            max_y_3 = sample.get_extremum_along_dim(dim=1, key=1)

        """
        result = np.zeros(self.dim)
        all_points = self.get_points_defining_boundary()
        if len(all_points) == 0:
            return result
        for dim in range(self.dim):
            result[dim] = self.get_extremum_along_dim(
                all_points, dim=dim, key=direction[dim]
            )
        return result

    # Pseudonyms for more general get_critical_point method

    def get_edge_center(self, direction) -> np.ndarray:
        """Get edge coordinates for certain direction."""
        return self.get_critical_point(direction)

    def get_corner(self, direction) -> np.ndarray:
        """Get corner coordinates for certain direction."""
        return self.get_critical_point(direction)

    def get_center(self) -> np.ndarray:
        """Get center coordinates"""
        return self.get_critical_point(np.zeros(self.dim))

    def get_center_of_mass(self):
        return np.apply_along_axis(np.mean, 0, self.get_all_points())

    def get_boundary_point(self, direction):