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diff --git a/external/include/glm/gtx/simd_quat.hpp b/external/include/glm/gtx/simd_quat.hpp
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+++ b/external/include/glm/gtx/simd_quat.hpp
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+/// @ref gtx_simd_quat
+/// @file glm/gtx/simd_quat.hpp
+///
+/// @see core (dependence)
+///
+/// @defgroup gtx_simd_quat GLM_GTX_simd_quat
+/// @ingroup gtx
+///
+/// @brief SIMD implementation of quat type.
+///
+/// <glm/gtx/simd_quat.hpp> need to be included to use these functionalities.
+
+#pragma once
+
+// Dependency:
+#include "../glm.hpp"
+#include "../gtc/quaternion.hpp"
+#include "../gtx/fast_trigonometry.hpp"
+
+#if GLM_ARCH != GLM_ARCH_PURE
+
+#if GLM_ARCH & GLM_ARCH_SSE2_BIT
+#	include "../gtx/simd_mat4.hpp"
+#else
+#	error "GLM: GLM_GTX_simd_quat requires compiler support of SSE2 through intrinsics"
+#endif
+
+#if GLM_MESSAGES == GLM_MESSAGES_ENABLED && !defined(GLM_EXT_INCLUDED)
+#	pragma message("GLM: GLM_GTX_simd_quat extension included")
+#	pragma message("GLM: GLM_GTX_simd_quat extension is deprecated and will be removed in GLM 0.9.9. Use GLM_GTC_quaternion instead and use compiler SIMD arguments.")
+#endif
+
+// Warning silencer for nameless struct/union.
+#if (GLM_COMPILER & GLM_COMPILER_VC)
+#   pragma warning(push)
+#   pragma warning(disable:4201)   // warning C4201: nonstandard extension used : nameless struct/union
+#endif
+
+namespace glm{
+namespace detail
+{
+	GLM_ALIGNED_STRUCT(16) fquatSIMD
+	{
+		typedef float value_type;
+		typedef std::size_t size_type;
+
+		typedef fquatSIMD type;
+		typedef tquat<bool, defaultp> bool_type;
+		typedef tquat<float, defaultp> pure_type;
+
+#ifdef GLM_SIMD_ENABLE_XYZW_UNION
+		union
+		{
+			__m128 Data;
+			struct {float x, y, z, w;};
+		};
+#else
+		__m128 Data;
+#endif
+
+		//////////////////////////////////////
+		// Implicit basic constructors
+
+		fquatSIMD() GLM_DEFAULT_CTOR;
+		fquatSIMD(fquatSIMD const & q) GLM_DEFAULT;
+		fquatSIMD(__m128 const & Data);
+
+		//////////////////////////////////////
+		// Explicit basic constructors
+
+		explicit fquatSIMD(
+			ctor);
+		explicit fquatSIMD(
+			float const & w,
+			float const & x,
+			float const & y,
+			float const & z);
+		explicit fquatSIMD(
+			quat const & v);
+		explicit fquatSIMD(
+			vec3 const & eulerAngles);
+
+
+		//////////////////////////////////////
+		// Unary arithmetic operators
+
+		fquatSIMD& operator= (fquatSIMD const & q) GLM_DEFAULT;
+		fquatSIMD& operator*=(float const & s);
+		fquatSIMD& operator/=(float const & s);
+	};
+
+
+	//////////////////////////////////////
+	// Arithmetic operators
+
+	detail::fquatSIMD operator- (
+		detail::fquatSIMD const & q);
+
+	detail::fquatSIMD operator+ (
+		detail::fquatSIMD const & q,
+		detail::fquatSIMD const & p);
+
+	detail::fquatSIMD operator* (
+		detail::fquatSIMD const & q,
+		detail::fquatSIMD const & p);
+
+	detail::fvec4SIMD operator* (
+		detail::fquatSIMD const & q,
+		detail::fvec4SIMD const & v);
+
+	detail::fvec4SIMD operator* (
+		detail::fvec4SIMD const & v,
+		detail::fquatSIMD const & q);
+
+	detail::fquatSIMD operator* (
+		detail::fquatSIMD const & q,
+		float s);
+
+	detail::fquatSIMD operator* (
+		float s,
+		detail::fquatSIMD const & q);
+
+	detail::fquatSIMD operator/ (
+		detail::fquatSIMD const & q,
+		float s);
+
+}//namespace detail
+
+	/// @addtogroup gtx_simd_quat
+	/// @{
+
+	typedef glm::detail::fquatSIMD simdQuat;
+
+	//! Convert a simdQuat to a quat.
+	/// @see gtx_simd_quat
+	quat quat_cast(
+		detail::fquatSIMD const & x);
+
+	//! Convert a simdMat4 to a simdQuat.
+	/// @see gtx_simd_quat
+	detail::fquatSIMD quatSIMD_cast(
+		detail::fmat4x4SIMD const & m);
+
+	//! Converts a mat4 to a simdQuat.
+	/// @see gtx_simd_quat
+	template <typename T, precision P>
+	detail::fquatSIMD quatSIMD_cast(
+		tmat4x4<T, P> const & m);
+
+	//! Converts a mat3 to a simdQuat.
+	/// @see gtx_simd_quat
+	template <typename T, precision P>
+	detail::fquatSIMD quatSIMD_cast(
+		tmat3x3<T, P> const & m);
+
+	//! Convert a simdQuat to a simdMat4
+	/// @see gtx_simd_quat
+	detail::fmat4x4SIMD mat4SIMD_cast(
+		detail::fquatSIMD const & q);
+
+	//! Converts a simdQuat to a standard mat4.
+	/// @see gtx_simd_quat
+	mat4 mat4_cast(
+		detail::fquatSIMD const & q);
+
+
+	/// Returns the length of the quaternion.
+	///
+	/// @see gtx_simd_quat
+	float length(
+		detail::fquatSIMD const & x);
+
+	/// Returns the normalized quaternion.
+	///
+	/// @see gtx_simd_quat
+	detail::fquatSIMD normalize(
+		detail::fquatSIMD const & x);
+
+	/// Returns dot product of q1 and q2, i.e., q1[0] * q2[0] + q1[1] * q2[1] + ...
+	///
+	/// @see gtx_simd_quat
+	float dot(
+		detail::fquatSIMD const & q1,
+		detail::fquatSIMD const & q2);
+
+	/// Spherical linear interpolation of two quaternions.
+	/// The interpolation is oriented and the rotation is performed at constant speed.
+	/// For short path spherical linear interpolation, use the slerp function.
+	///
+	/// @param x A quaternion
+	/// @param y A quaternion
+	/// @param a Interpolation factor. The interpolation is defined beyond the range [0, 1].
+	/// @tparam T Value type used to build the quaternion. Supported: half, float or double.
+	/// @see gtx_simd_quat
+	/// @see - slerp(detail::fquatSIMD const & x, detail::fquatSIMD const & y, T const & a)
+	detail::fquatSIMD mix(
+		detail::fquatSIMD const & x,
+		detail::fquatSIMD const & y,
+		float const & a);
+
+	/// Linear interpolation of two quaternions.
+	/// The interpolation is oriented.
+	///
+	/// @param x A quaternion
+	/// @param y A quaternion
+	/// @param a Interpolation factor. The interpolation is defined in the range [0, 1].
+	/// @tparam T Value type used to build the quaternion. Supported: half, float or double.
+	/// @see gtx_simd_quat
+	detail::fquatSIMD lerp(
+		detail::fquatSIMD const & x,
+		detail::fquatSIMD const & y,
+		float const & a);
+
+	/// Spherical linear interpolation of two quaternions.
+	/// The interpolation always take the short path and the rotation is performed at constant speed.
+	///
+	/// @param x A quaternion
+	/// @param y A quaternion
+	/// @param a Interpolation factor. The interpolation is defined beyond the range [0, 1].
+	/// @tparam T Value type used to build the quaternion. Supported: half, float or double.
+	/// @see gtx_simd_quat
+	detail::fquatSIMD slerp(
+		detail::fquatSIMD const & x,
+		detail::fquatSIMD const & y,
+		float const & a);
+
+
+	/// Faster spherical linear interpolation of two unit length quaternions.
+	///
+	/// This is the same as mix(), except for two rules:
+	///   1) The two quaternions must be unit length.
+	///   2) The interpolation factor (a) must be in the range [0, 1].
+	///
+	/// This will use the equivalent to fastAcos() and fastSin().
+	///
+	/// @see gtx_simd_quat
+	/// @see - mix(detail::fquatSIMD const & x, detail::fquatSIMD const & y, T const & a)
+	detail::fquatSIMD fastMix(
+		detail::fquatSIMD const & x,
+		detail::fquatSIMD const & y,
+		float const & a);
+
+	/// Identical to fastMix() except takes the shortest path.
+	///
+	/// The same rules apply here as those in fastMix(). Both quaternions must be unit length and 'a' must be
+	/// in the range [0, 1].
+	///
+	/// @see - fastMix(detail::fquatSIMD const & x, detail::fquatSIMD const & y, T const & a)
+	/// @see - slerp(detail::fquatSIMD const & x, detail::fquatSIMD const & y, T const & a)
+	detail::fquatSIMD fastSlerp(
+		detail::fquatSIMD const & x,
+		detail::fquatSIMD const & y,
+		float const & a);
+
+
+	/// Returns the q conjugate.
+	///
+	/// @see gtx_simd_quat
+	detail::fquatSIMD conjugate(
+		detail::fquatSIMD const & q);
+
+	/// Returns the q inverse.
+	///
+	/// @see gtx_simd_quat
+	detail::fquatSIMD inverse(
+		detail::fquatSIMD const & q);
+
+	/// Build a quaternion from an angle and a normalized axis.
+	///
+	/// @param angle Angle expressed in radians.
+	/// @param axis Axis of the quaternion, must be normalized.
+	///
+	/// @see gtx_simd_quat
+	detail::fquatSIMD angleAxisSIMD(
+		float const & angle,
+		vec3 const & axis);
+
+	/// Build a quaternion from an angle and a normalized axis.
+	///
+	/// @param angle Angle expressed in radians.
+	/// @param x x component of the x-axis, x, y, z must be a normalized axis
+	/// @param y y component of the y-axis, x, y, z must be a normalized axis
+	/// @param z z component of the z-axis, x, y, z must be a normalized axis
+	///
+	/// @see gtx_simd_quat
+	detail::fquatSIMD angleAxisSIMD(
+		float const & angle,
+		float const & x,
+		float const & y,
+		float const & z);
+
+	// TODO: Move this to somewhere more appropriate. Used with fastMix() and fastSlerp().
+	/// Performs the equivalent of glm::fastSin() on each component of the given __m128.
+	__m128 fastSin(__m128 x);
+
+	/// @}
+}//namespace glm
+
+#include "simd_quat.inl"
+
+
+#if (GLM_COMPILER & GLM_COMPILER_VC)
+#   pragma warning(pop)
+#endif
+
+
+#endif//(GLM_ARCH != GLM_ARCH_PURE)