From b62d618841b5d72c82d6a0f2e498a76f91a78851 Mon Sep 17 00:00:00 2001
From: Mason Green <mason.green@gmail.com>
Date: Sat, 2 Jul 2011 09:26:45 -0400
Subject: [PATCH] added #define for MSVC

---
 poly2tri/common/utils.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/poly2tri/common/utils.h b/poly2tri/common/utils.h
index 23c435d..88d0c9e 100644
--- a/poly2tri/common/utils.h
+++ b/poly2tri/common/utils.h
@@ -32,6 +32,9 @@
 #ifndef UTILS_H
 #define UTILS_H
 
+// Otherwise #defines like M_PI are undeclared under Visual Studio
+#define _USE_MATH_DEFINES
+
 #include <exception>
 #include <math.h>