text: /// @ref ext_quaternion_relational
  /// @file glm/ext/quaternion_relational.hpp
  ///
  /// @defgroup ext_quaternion_relational GLM_EXT_quaternion_relational
  /// @ingroup ext
  ///
  /// Exposes comparison functions for quaternion types that take a user defined epsilon values.
  ///
  /// Include <glm/ext/quaternion_relational.hpp> to use the features of this extension.
  ///
  /// @see core_vector_relational
  /// @see ext_vector_relational
  /// @see ext_matrix_relational
  /// @see ext_quaternion_float
  /// @see ext_quaternion_double
  
  #pragma once
  
  // Dependency:
  #include "../vector_relational.hpp"
  
  #if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
  #	pragma message("GLM: GLM_EXT_quaternion_relational extension included")
  #endif
  
  namespace glm
  {
  	/// @addtogroup ext_quaternion_relational
  	/// @{
  	/// Returns the component-wise comparison of result x == y.
  	///
  	/// @tparam T Floating-point scalar types
  	/// @tparam Q Value from qualifier enum
  	template<typename T, qualifier Q>
  	GLM_FUNC_DECL vec<4, bool, Q> equal(qua<T, Q> const& x, qua<T, Q> const& y);
  
  	/// Returns the component-wise comparison of |x - y| < epsilon.
  	///
  	/// @tparam T Floating-point scalar types
  	/// @tparam Q Value from qualifier enum
  	template<typename T, qualifier Q>
  	GLM_FUNC_DECL vec<4, bool, Q> equal(qua<T, Q> const& x, qua<T, Q> const& y, T epsilon);
  
  	/// Returns the component-wise comparison of result x != y.
  	///
  	/// @tparam T Floating-point scalar types
  	/// @tparam Q Value from qualifier enum
  	template<typename T, qualifier Q>
  	GLM_FUNC_DECL vec<4, bool, Q> notEqual(qua<T, Q> const& x, qua<T, Q> const& y);
  
  	/// Returns the component-wise comparison of |x - y| >= epsilon.
  	///
  	/// @tparam T Floating-point scalar types
  	/// @tparam Q Value from qualifier enum
  	template<typename T, qualifier Q>
  	GLM_FUNC_DECL vec<4, bool, Q> notEqual(qua<T, Q> const& x, qua<T, Q> const& y, T epsilon);
  
  	/// @}
  } //namespace glm
  
  #include "quaternion_relational.inl"