raytracing/Glm/gtx/integer.hpp

///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
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/// @ref gtx_integer
/// @file glm/gtx/integer.hpp
/// @date 2005-12-24 / 2011-10-13
/// @author Christophe Riccio
///
/// @see core (dependence)
///
/// @defgroup gtx_integer GLM_GTX_integer
/// @ingroup gtx
/// 
/// @brief Add support for integer for core functions
/// 
/// <glm/gtx/integer.hpp> need to be included to use these functionalities.
///////////////////////////////////////////////////////////////////////////////////

#ifndef GLM_GTX_integer
#define GLM_GTX_integer GLM_VERSION

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

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

namespace glm
{
	/// @addtogroup gtx_integer
	/// @{

	//! Returns x raised to the y power. 
	//! From GLM_GTX_integer extension.
	int pow(int x, int y);

	//! Returns the positive square root of x.
	//! From GLM_GTX_integer extension.
	int sqrt(int x);

	//! Returns the log2 of x. Can be reliably using to compute mipmap count from the texture size.
	//! From GLM_GTX_integer extension.
	template <typename genIUType>
	genIUType log2(genIUType const & x);

	//! Returns the floor log2 of x.
	//! From GLM_GTX_integer extension.
	unsigned int floor_log2(unsigned int x);

	//! Modulus. Returns x - y * floor(x / y) for each component in x using the floating point value y.
	//! From GLM_GTX_integer extension.
	int mod(int x, int y);

	//! Return the factorial value of a number (!12 max, integer only)
	//! From GLM_GTX_integer extension.
	template <typename genType> 
	genType factorial(genType const & x);

	//! 32bit signed integer. 
	//! From GLM_GTX_integer extension.
	typedef signed int					sint;

	//! Returns x raised to the y power.
	//! From GLM_GTX_integer extension.
	uint pow(uint x, uint y);

	//! Returns the positive square root of x. 
	//! From GLM_GTX_integer extension.
	uint sqrt(uint x);

	//! Modulus. Returns x - y * floor(x / y) for each component in x using the floating point value y.
	//! From GLM_GTX_integer extension.
	uint mod(uint x, uint y);

	//! Returns the number of leading zeros.
	//! From GLM_GTX_integer extension.
	uint nlz(uint x);

	/// @}
}//namespace glm

#include "integer.inl"

#endif//GLM_GTX_integer