Fixed quat slerp using mix function when cosTheta close to 1

glm/gtc/quaternion.inl

@@ -452,7 +452,7 @@ namespace detail
 	)
 	{
 		T cosTheta = dot(x, y);
-        if(cosTheta <= epsilon<T>())
+		if(glm::abs(cosTheta - T(1)) <= epsilon<T>())
 		{
 			return detail::tquat<T>(
 				mix(x.x, y.x, a),

readme.txt

@@ -44,6 +44,7 @@ GLM 0.9.4.1: 2012-12-17
 - Fixed interaction between quaternion and euler angles.
 - Fixed GTC_constants build
 - Fixed GTX_multiple
+- Fixed quat slerp using mix function when cosTheta close to 1
 
 ================================================================================
 GLM 0.9.4.0: 2012-11-18