matplotlib · brunobeltran · Apr 20, 2020 · Aug 31, 2020
diff --git a/doc/users/next_whats_new/2020-06-17-path-extents.rst b/doc/users/next_whats_new/2020-06-17-path-extents.rst
@@ -0,0 +1,10 @@
+New function to get Path's *stroked* Bbox
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+A Path is typically drawn by stroking it (with some ``markeredgewidth``), an
+operation which changes its bounding box in a nontrivial way, depending on the
+Path's joinstyle, capstyle, miterlimit, and shape.
+
+`~.path.Path.get_stroked_extents` was added to allow computation of the final
+bounding box in pixel/points coordinates of the line, after it has been drawn
+(and accounting for the joinstyle, capstyle, and miterlimit).
diff --git a/lib/matplotlib/bezier.py b/lib/matplotlib/bezier.py
@@ -235,6 +235,20 @@ def degree(self):
         """Degree of the polynomial. One less the number of control points."""
         return self._N - 1
 
+    @property
+    def tan_in(self):
+        if self._N < 2:
+            raise ValueError("Need at least two control points to get tangent "
+                             "vector!")
+        return self.control_points[1] - self.control_points[0]
+
+    @property
+    def tan_out(self):
+        if self._N < 2:
+            raise ValueError("Need at least two control points to get tangent "
+                             "vector!")
+        return self.control_points[-1] - self.control_points[-2]
+
     @property
     def polynomial_coefficients(self):
         r"""