Method get_points

lib/matplotlib/projections/polar.py:738–769

(self)

    __str__ = mtransforms._make_str_method("_center", "_viewLim", "_originLim")

    def get_points(self):
        # docstring inherited
        if self._invalid:
            points = self._viewLim.get_points().copy()
            # Scale angular limits to work with Wedge.
            points[:, 0] *= 180 / np.pi
            if points[0, 0] > points[1, 0]:
                points[:, 0] = points[::-1, 0]

            # Scale radial limits based on origin radius.
            points[:, 1] -= self._originLim.y0

            # Scale radial limits to match axes limits.
            rscale = 0.5 / points[1, 1]
            points[:, 1] *= rscale
            width = min(points[1, 1] - points[0, 1], 0.5)

            # Generate bounding box for wedge.
            wedge = mpatches.Wedge(self._center, points[1, 1],
                                   points[0, 0], points[1, 0],
                                   width=width)
            self.update_from_path(wedge.get_path())

            # Ensure equal aspect ratio.
            w, h = self._points[1] - self._points[0]
            deltah = max(w - h, 0) / 2
            deltaw = max(h - w, 0) / 2
            self._points += np.array([[-deltaw, -deltah], [deltaw, deltah]])

            self._invalid = 0

        return self._points


class PolarAxes(Axes):