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diff --git a/src/moof/cml/quaternion/quaternion_functions.h b/src/moof/cml/quaternion/quaternion_functions.h
deleted file mode 100644
index 95abcb9..0000000
--- a/src/moof/cml/quaternion/quaternion_functions.h
+++ /dev/null
@@ -1,172 +0,0 @@
-/* -*- C++ -*- ------------------------------------------------------------
- 
-Copyright (c) 2007 Jesse Anders and Demian Nave http://cmldev.net/
-
-The Configurable Math Library (CML) is distributed under the terms of the
-Boost Software License, v1.0 (see cml/LICENSE for details).
-
- *-----------------------------------------------------------------------*/
-/** @file
- *  @brief Functions on quaternions.
- *
- * @todo The functions that return quaternions and vectors should be changed
- * to return quaternion expression nodes, as should the corresponding
- * class methods.
- */
-
-#ifndef quaternion_functions_h
-#define quaternion_functions_h
-
-#include <cml/mathlib/checking.h> // For CheckQuat()
-#include <cml/mathlib/epsilon.h>
-#include <cml/util.h> // For acos_safe()
-
-namespace cml {
-
-/** Returns the real part of the quaternion. */
-template<typename E, class AT, class OT, class CT>
-inline typename quaternion<E,AT,OT,CT>::value_type
-real(const quaternion<E,AT,OT,CT>& q)
-{
-    return q.real();
-}
-
-/** Returns the real (scalar) part of the QuaternionXpr. */
-template<typename XprT>
-inline typename et::QuaternionXpr<XprT>::value_type
-real(const et::QuaternionXpr<XprT>& e)
-{
-    return e.real();
-}
-
-/** Returns the imaginary (vector) part of the quaternion. */
-template<typename E, class AT, class OT, class CT>
-inline typename quaternion<E,AT,OT,CT>::imaginary_type
-imaginary(const quaternion<E,AT,OT,CT>& q)
-{
-    return q.imaginary();
-}
-
-/** Returns the imaginary (vector) part of the QuaternionXpr. */
-template<typename XprT>
-//inline typename et::QuaternionXpr<XprT>::temporary_type
-inline typename et::QuaternionXpr<XprT>::imaginary_type
-imaginary(const et::QuaternionXpr<XprT>& e)
-{
-    return e.imaginary();
-}
-
-/** Cayley norm of a quaternion. */
-template<typename E, class AT, class OT, class CT>
-inline typename quaternion<E,AT,OT,CT>::value_type
-norm(const quaternion<E,AT,OT,CT>& arg)
-{
-    return arg.length_squared();
-}
-
-/** Cayley norm of a QuaternionXpr. */
-template<typename XprT>
-inline typename XprT::value_type
-norm(QUATXPR_ARG_TYPE arg)
-{
-    return arg.length_squared();
-}
-
-/** Squared length of a quaternion. */
-template<typename E, class AT, class OT, class CT>
-inline typename quaternion<E,AT,OT,CT>::value_type
-length_squared(const quaternion<E,AT,OT,CT>& arg)
-{
-    return arg.length_squared();
-}
-
-/** Squared length of a quaternion expr. */
-template<typename XprT>
-inline typename XprT::value_type
-length_squared(QUATXPR_ARG_TYPE arg)
-{
-    return arg.length_squared();
-}
-
-/** Length of a quaternion. */
-template<typename E, class AT, class OT, class CT>
-inline typename quaternion<E,AT,OT,CT>::value_type
-length(const quaternion<E,AT,OT,CT>& arg)
-{
-    return arg.length();
-}
-
-/** Length of a quaternion expr. */
-template<typename XprT>
-inline typename XprT::value_type
-length(QUATXPR_ARG_TYPE arg)
-{
-    return arg.length();
-}
-
-/** Normalize a quaternion.
- *
- * The input quaternion is not changed.
- */
-template<typename E, class AT, class OT, class CT>
-inline quaternion<E,AT,OT,CT>
-normalize(const quaternion<E,AT,OT,CT>& arg)
-{
-    typename quaternion<E,AT,OT,CT>::temporary_type result(arg);
-    result.normalize();
-    return result;
-}
-
-/** Normalize a quaternion expr. */
-template<typename XprT>
-inline typename XprT::temporary_type
-normalize(QUATXPR_ARG_TYPE arg)
-{
-    return arg.normalize();
-}
-
-/** Set a quaternion to the multiplicative identity.
- *
- * The input quaternion is not changed.
- */
-template<typename E, class AT, class OT, class CT>
-inline quaternion<E,AT,OT,CT>
-identity(const quaternion<E,AT,OT,CT>& arg)
-{
-    typename quaternion<E,AT,OT,CT>::temporary_type result(arg);
-    result.identity();
-    return result;
-}
-
-/** Log of a quaternion or quaternion expression.
- */
-template < class QuatT >
-typename QuatT::temporary_type log(
-    const QuatT& q,
-    typename QuatT::value_type tolerance =
-        epsilon<typename QuatT::value_type>::placeholder())
-{
-    detail::CheckQuat(q);
-
-    return q.log();
-}
-
-/** Exponential function of a quaternion or quaternion expression.
- */
-template < class QuatT >
-typename QuatT::temporary_type exp(
-    const QuatT& q,
-    typename QuatT::value_type tolerance =
-        epsilon<typename QuatT::value_type>::placeholder())
-{
-    detail::CheckQuat(q);
-
-    return q.exp();
-}
-
-} // namespace cml
-
-#endif
-
-// -------------------------------------------------------------------------
-// vim:ft=cpp