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diff --git a/src/glm/gtx/gradient_paint.inl b/src/glm/gtx/gradient_paint.inl
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+///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2009-03-06
+// Updated : 2009-03-09
+// Licence : This source is under MIT License
+// File    : glm/gtx/gradient_paint.inl
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+namespace glm{
+namespace gtx{
+namespace gradient_paint{
+
+	template <typename valType>
+	valType radialGradient(
+		glm::detail::tvec2<valType> const & Center,
+		valType const & Radius,
+		glm::detail::tvec2<valType> const & Focal,
+		glm::detail::tvec2<valType> const & Position)
+	{
+		glm::detail::tvec2<valType> F = Focal - Center;
+		glm::detail::tvec2<valType> D = Position - Focal;
+		valType Radius2 = gtx::optimum_pow::pow2(Radius);
+		valType Fx2 = gtx::optimum_pow::pow2(F.x);
+		valType Fy2 = gtx::optimum_pow::pow2(F.y);
+
+		valType Numerator = (D.x * F.x + D.y * F.y) + glm::sqrt(Radius2 * (gtx::optimum_pow::pow2(D.x) + gtx::optimum_pow::pow2(D.y)) - gtx::optimum_pow::pow2(D.x * F.y - D.y * F.x));
+		valType Denominator = Radius2 - (Fx2 + Fy2);
+		return Numerator / Denominator;
+	}
+
+	template <typename valType>
+	valType linearGradient(
+		glm::detail::tvec2<valType> const & Point0,
+		glm::detail::tvec2<valType> const & Point1,
+		glm::detail::tvec2<valType> const & Position)
+	{
+		glm::detail::tvec2<valType> Dist = Point1 - Point0;
+		return (Dist.x * (Position.x - Point0.x) + Dist.y * (Position.y - Point0.y)) / glm::dot(Dist, Dist);
+	}
+
+}//namespace gradient_paint
+}//namespace gtx
+}//namespace glm