shader/Glm/gtc/ulp.hpp

///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
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/// @ref gtc_ulp
/// @file glm/gtc/ulp.hpp
/// @date 2011-02-21 / 2011-12-12
/// @author Christophe Riccio
///
/// @see core (dependence)
///
/// @defgroup gtc_ulp GLM_GTC_ulp
/// @ingroup gtc
/// 
/// @brief Allow the measurement of the accuracy of a function against a reference 
/// implementation. This extension works on floating-point data and provide results 
/// in ULP.
/// <glm/gtc/ulp.hpp> need to be included to use these features.
///////////////////////////////////////////////////////////////////////////////////

#ifndef GLM_GTC_ulp
#define GLM_GTC_ulp GLM_VERSION

// Dependency:
#include "../glm.hpp"

#if(defined(GLM_MESSAGES) && !defined(glm_ext))
#	pragma message("GLM: GLM_GTC_ulp extension included")
#endif

namespace glm
{
	/// @addtogroup gtc_ulp
	/// @{

	/// Return the next ULP value(s) after the input value(s).
	/// @see gtc_ulp
    template <typename genType>
    genType next_float(genType const & x);
        
	/// Return the previous ULP value(s) before the input value(s).
	/// @see gtc_ulp
    template <typename genType>
    genType prev_float(genType const & x);

	/// Return the value(s) ULP distance after the input value(s).
	/// @see gtc_ulp
    template <typename genType>
    genType next_float(genType const & x, uint const & Distance);
        
    /// Return the value(s) ULP distance before the input value(s).
	/// @see gtc_ulp
    template <typename genType>
    genType prev_float(genType const & x, uint const & Distance);
        
    /// Return the distance in the number of ULP between 2 scalars.
	/// @see gtc_ulp
    template <typename T>
    uint float_distance(T const & x, T const & y);
        
    /// Return the distance in the number of ULP between 2 vectors.
	/// @see gtc_ulp
    template<typename T, template<typename> class vecType>
    vecType<uint> float_distance(vecType<T> const & x, vecType<T> const & y);
        
	/// @}
}// namespace glm

#include "ulp.inl"

#endif//GLM_GTC_ulp