Merged revisions 5787 via svnmerge from

jdh2358 · jdh2358 · commit 5e6c0bfecbaf · 2008-07-18T14:49:09.000Z
https://matplotlib.svn.sourceforge.net/svnroot/matplotlib/branches/v0_91_maint ........ r5787 | jdh2358 | 2008-07-18 09:46:32 -0500 (Fri, 18 Jul 2008) | 1 line added Tuukka's YAArrow fix for horiz and vertical lines ........ svn path=/trunk/matplotlib/; revision=5788
diff --git a/lib/matplotlib/patches.py b/lib/matplotlib/patches.py
@@ -858,6 +858,12 @@ def getpoints(self, x1,y1,x2,y2, k):
         *y2*) of the returned points is *k*.
         """
         x1,y1,x2,y2,k = map(float, (x1,y1,x2,y2,k))
+
+        if y2-y1 == 0:
+            return x2, y2+k, x2, y2-k
+        elif x2-x1 == 0:
+            return x2+k, y2, x2-k, y2
+
         m = (y2-y1)/(x2-x1)
         pm = -1./m
         a = 1
