Added new versions of glm::equalEpsilon and glm::notEqualEpsilon for glm::quat.

quat_epsilon.patch

From d556ba797f8ce23fdd5052d446f6c142878fac7f Mon Sep 17 00:00:00 2001
From: jimvonmoon <jim@jim.com>
Date: Thu, 15 Nov 2012 14:51:50 +0100
Subject: [PATCH] Added new versions of glm::equalEpsilon and
 glm::notEqualEpsilon for glm::quat.

---
 glm/gtx/epsilon.inl | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/glm/gtx/epsilon.inl b/glm/gtx/epsilon.inl
index 7a82f7c..ceb3bbd 100644
--- a/glm/gtx/epsilon.inl
+++ b/glm/gtx/epsilon.inl
@@ -72,6 +72,21 @@ namespace glm
 	}
 
 	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec4<bool> equalEpsilon
+	(
+		detail::tquat<valType> const & x, 
+		detail::tquat<valType> const & y, 
+		valType const & epsilon
+	)
+	{
+		return detail::tvec4<bool>(
+			abs(x.x - y.x) < epsilon,
+			abs(x.y - y.y) < epsilon,
+			abs(x.z - y.z) < epsilon,
+			abs(x.w - y.w) < epsilon);
+	}
+
+	template <typename valType>
 	GLM_FUNC_QUALIFIER detail::tvec2<bool> notEqualEpsilon
 	(
 		detail::tvec2<valType> const & x, 
@@ -114,6 +129,21 @@ namespace glm
 	}
 
 	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec4<bool> notEqualEpsilon
+	(
+		detail::tquat<valType> const & x, 
+		detail::tquat<valType> const & y, 
+		valType const & epsilon
+	)
+	{
+		return detail::tvec4<bool>(
+			abs(x.x - y.x) >= epsilon,
+			abs(x.y - y.y) >= epsilon,
+			abs(x.z - y.z) >= epsilon,
+			abs(x.w - y.w) >= epsilon);
+	}
+
+	template <typename valType>
 	GLM_FUNC_QUALIFIER detail::tvec2<bool> equalEpsilon
 	(
 		detail::tvec2<valType> const & x, 
-- 
1.8.0.msysgit.0