Fixed abs function for half based types

glm/gtc/half_float.hpp

@@ -22,7 +22,7 @@
 ///
 /// @ref gtc_half_float
 /// @file glm/gtc/half_float.hpp
-/// @date 2009-04-29 / 2011-06-05
+/// @date 2009-04-29 / 2012-11-06
 /// @author Christophe Riccio
 ///
 /// @see core (dependence)
@@ -416,6 +416,22 @@ namespace detail
 	/// @see gtc_half_float
 	typedef detail::tmat4x4<detail::half>	hmat4x4;
 
+	/// Returns the absolute value of a half-precision floating-point value
+	/// @see gtc_half_float
+	half abs(half const & x);
+
+	/// Returns the absolute value of a half-precision floating-point two dimensional vector
+	/// @see gtc_half_float
+	hvec2 abs(hvec2 const & x);
+
+	/// Returns the absolute value of a half-precision floating-point three dimensional vector
+	/// @see gtc_half_float
+	hvec3 abs(hvec3 const & x);
+
+	/// Returns the absolute value of a half-precision floating-point four dimensional vector
+	/// @see gtc_half_float
+	hvec4 abs(hvec4 const & x);
+
 	/// @}
 }// namespace glm
 

glm/gtc/half_float.inl

@@ -22,7 +22,7 @@
 ///
 /// @ref gtc_half_float
 /// @file glm/gtc/half_float.inl
-/// @date 2009-04-29 / 2011-06-05
+/// @date 2009-04-29 / 2012-11-06
 /// @author Christophe Riccio
 ///////////////////////////////////////////////////////////////////////////////////
 
@@ -1006,4 +1006,34 @@ namespace detail
 #endif//(GLM_COMPONENT == GLM_COMPONENT_CXX98)
 
 }//namespace detail
+
+	GLM_FUNC_QUALIFIER half abs(half const & x)
+	{
+		return float(x) >= float(0) ? x : -x;
+	}
+
+	GLM_FUNC_QUALIFIER hvec2 abs(hvec2 const & v)
+	{
+		return hvec2(
+			float(v.x) >= float(0) ? v.x : -v.x, 
+			float(v.y) >= float(0) ? v.y : -v.y);
+	}
+
+	GLM_FUNC_QUALIFIER hvec3 abs(hvec3 const & v)
+	{
+		return hvec3(
+			float(v.x) >= float(0) ? v.x : -v.x, 
+			float(v.y) >= float(0) ? v.y : -v.y, 
+			float(v.z) >= float(0) ? v.z : -v.z);
+	}
+
+	GLM_FUNC_QUALIFIER hvec4 abs(hvec4 const & v)
+	{
+		return hvec4(
+			float(v.x) >= float(0) ? v.x : -v.x, 
+			float(v.y) >= float(0) ? v.y : -v.y, 
+			float(v.z) >= float(0) ? v.z : -v.z, 
+			float(v.w) >= float(0) ? v.w : -v.w);
+	}
+
 }//namespace glm