Add some helper methods to Patches

dstansby · dstansby · commit 66a94a263d7b · 2021-12-16T13:53:03.000Z
diff --git a/lib/matplotlib/patches.py b/lib/matplotlib/patches.py
@@ -806,6 +806,24 @@ def get_xy(self):
         """Return the left and bottom coords of the rectangle as a tuple."""
         return self._x0, self._y0
 
+    def get_edge_midpoints(self):
+        """
+        Return the edge midpoints of the rectangle, moving clockwise from the
+        center of the left-hand edge.
+        """
+        return self.get_patch_transform().transform(
+            [(0, 0.5), (0.5, 1), (1, 0.5), (0.5, 0)])
+
+    def get_corners(self):
+        """
+        Return the corners of the rectangle, moving clockwise from (x, y).
+        """
+        return self.get_patch_transform().transform(
+            [(0, 0), (1, 0), (1, 1), (0, 1)])
+
+    def get_center(self):
+        return self.get_patch_transform().transform((0.5, 0.5))
+
     def get_width(self):
         """Return the width of the rectangle."""
         return self._width
@@ -1657,6 +1675,20 @@ def get_angle(self):
 
     angle = property(get_angle, set_angle)
 
+    def get_corners(self):
+        """
+        Return the corners of the rectangle, moving clockwise from (x0, y0).
+        """
+        return self.get_patch_transform().transform(
+            [(-1, -1), (1, -1), (1, 1), (-1, 1)])
+
+    def get_edge_midpoints(self):
+        """
+        Return the corners of the rectangle, moving clockwise from (x, y).
+        """
+        return self.get_patch_transform().transform(
+            [(0, -1), (1, 0), (0, 1), (-1, 0)])
+
 
 class Annulus(Patch):
     """
