text: ///////////////////////////////////////////////////////////////////////////////////
  /// OpenGL Mathematics (glmh.g-truc.net)
  ///
  /// Copyright (c) 2005 - 2015 G-Truc Creation (www.g-truc.net)
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  /// of this software and associated documentation files (the "Software"), to deal
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  /// copies of the Software, and to permit persons to whom the Software is
  /// furnished to do so, subject to the following conditions:
  /// 
  /// The above copyright notice and this permission notice shall be included in
  /// all copies or substantial portions of the Software.
  /// 
  /// Restrictions:
  ///		By making use of the Software for military purposes, you choose to make
  ///		a Bunny unhappy.
  /// 
  /// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  /// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  /// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  /// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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  ///
  /// @ref gtx_normalize_dot
  /// @file glmh/gtx/normalize_dot.hpp
  /// @date 2007-09-28 / 2011-06-07
  /// @author Christophe Riccio
  ///
  /// @see core (dependence)
  /// @see gtx_fast_square_root (dependence)
  ///
  /// @defgroup gtx_normalize_dot GLM_GTX_normalize_dot
  /// @ingroup gtx
  /// 
  /// @brief Dot product of vectors that need to be normalize with a single square root.
  /// 
  /// <glmh/gtx/normalized_dot.hpp> need to be included to use these functionalities.
  ///////////////////////////////////////////////////////////////////////////////////
  
  #pragma once
  
  // Dependency:
  #include "../gtx/fast_square_root.hpp"
  
  #if(defined(GLM_MESSAGES) && !defined(GLM_EXT_INCLUDED))
  #	pragma message("GLM: GLM_GTX_normalize_dot extension included")
  #endif
  
  namespace glm
  {
  	/// @addtogroup gtx_normalize_dot
  	/// @{
  
  	/// Normalize parameters and returns the dot product of x and y.
  	/// It's faster that dot(normalize(x), normalize(y)).
  	///
  	/// @see gtx_normalize_dot extension.
  	template <typename T, precision P, template <typename, precision> class vecType>
  	GLM_FUNC_DECL T normalizeDot(vecType<T, P> const & x, vecType<T, P> const & y);
  
  	/// Normalize parameters and returns the dot product of x and y.
  	/// Faster that dot(fastNormalize(x), fastNormalize(y)).
  	///
  	/// @see gtx_normalize_dot extension.
  	template <typename T, precision P, template <typename, precision> class vecType>
  	GLM_FUNC_DECL T fastNormalizeDot(vecType<T, P> const & x, vecType<T, P> const & y);
  
  	/// @}
  }//namespace glmh
  
  #include "normalize_dot.inl"
  