glm/glm/gtx/common.inl

///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
/// Copyright (c) 2005 - 2015 G-Truc Creation (www.g-truc.net)
/// Permission is hereby granted, free of charge, to any person obtaining a copy
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/// in the Software without restriction, including without limitation the rights
/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
/// 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
/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
/// THE SOFTWARE.
///
/// @ref gtx_common
/// @file glm/gtx/common.inl
/// @date 2014-09-08 / 2014-09-08
/// @author Christophe Riccio
///////////////////////////////////////////////////////////////////////////////////

#include <cmath>

namespace glm{
namespace detail
{
	template <typename T, precision P, template <class, precision> class vecType, bool isFloat = true>
	struct compute_fmod
	{
		GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & a, vecType<T, P> const & b)
		{
			return detail::functor2<T, P, vecType>::call(std::fmod, a, b);
		}
	};

	template <typename T, precision P, template <class, precision> class vecType>
	struct compute_fmod<T, P, vecType, false>
	{
		GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & a, vecType<T, P> const & b)
		{
			return a % b;
		}
	};
}//namespace detail

	template <typename T> 
	GLM_FUNC_QUALIFIER bool isdenormal(T const & x)
	{
		GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'isdenormal' only accept floating-point inputs");

#		if GLM_HAS_CXX11_STL
			return std::fpclassify(x) == FP_SUBNORMAL;
#		else
			return x != static_cast<T>(0) && std::fabs(x) < std::numeric_limits<T>::min();
#		endif
	}

	template <typename T, precision P>
	GLM_FUNC_QUALIFIER typename tvec1<T, P>::bool_type isdenormal
	(
		tvec1<T, P> const & x
	)
	{
		GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'isdenormal' only accept floating-point inputs");

		return typename tvec1<T, P>::bool_type(
			isdenormal(x.x));
	}

	template <typename T, precision P>
	GLM_FUNC_QUALIFIER typename tvec2<T, P>::bool_type isdenormal
	(
		tvec2<T, P> const & x
	)
	{
		GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'isdenormal' only accept floating-point inputs");

		return typename tvec2<T, P>::bool_type(
			isdenormal(x.x),
			isdenormal(x.y));
	}

	template <typename T, precision P>
	GLM_FUNC_QUALIFIER typename tvec3<T, P>::bool_type isdenormal
	(
		tvec3<T, P> const & x
	)
	{
		GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'isdenormal' only accept floating-point inputs");

		return typename tvec3<T, P>::bool_type(
			isdenormal(x.x),
			isdenormal(x.y),
			isdenormal(x.z));
	}

	template <typename T, precision P>
	GLM_FUNC_QUALIFIER typename tvec4<T, P>::bool_type isdenormal
	(
		tvec4<T, P> const & x
	)
	{
		GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'isdenormal' only accept floating-point inputs");

		return typename tvec4<T, P>::bool_type(
			isdenormal(x.x),
			isdenormal(x.y),
			isdenormal(x.z),
			isdenormal(x.w));
	}

	// fmod
	template <typename genType>
	GLM_FUNC_QUALIFIER genType fmod(genType x, genType y)
	{
		return fmod(tvec1<genType>(x), y).x;
	}

	template <typename T, precision P, template <typename, precision> class vecType>
	GLM_FUNC_QUALIFIER vecType<T, P> fmod(vecType<T, P> const & x, T y)
	{
		return detail::compute_fmod<T, P, vecType, std::numeric_limits<T>::is_iec559>::call(x, vecType<T, P>(y));
	}

	template <typename T, precision P, template <typename, precision> class vecType>
	GLM_FUNC_QUALIFIER vecType<T, P> fmod(vecType<T, P> const & x, vecType<T, P> const & y)
	{
		return detail::compute_fmod<T, P, vecType, std::numeric_limits<T>::is_iec559>::call(x, y);
	}
}//namespace glm