From 27876eb2fcac2226e7dbdbdf363a50164af61a48 Mon Sep 17 00:00:00 2001
From: Charles Jekel <cjekel@gmail.com>
Date: Fri, 20 Dec 2019 07:50:50 -0800
Subject: [PATCH] bug in is simple quad; simple quads should have crossTF = 0,
 2, or 4, and complex otherwise

---
 similaritymeasures/VERSION               | 2 +-
 similaritymeasures/similaritymeasures.py | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/similaritymeasures/VERSION b/similaritymeasures/VERSION
index 1d0ba9e..267577d 100644
--- a/similaritymeasures/VERSION
+++ b/similaritymeasures/VERSION
@@ -1 +1 @@
-0.4.0
+0.4.1
diff --git a/similaritymeasures/similaritymeasures.py b/similaritymeasures/similaritymeasures.py
index f75af41..2781113 100644
--- a/similaritymeasures/similaritymeasures.py
+++ b/similaritymeasures/similaritymeasures.py
@@ -99,6 +99,8 @@ def is_simple_quad(ab, bc, cd, da):
         crossTF = cross <= 0
     if sum(crossTF) == 2:
         return True
+    elif sum(crossTF) == 4:
+        return True
     else:
         return False