Initial commit

vendor/include/glm/gtc/round.inl

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+/// @ref gtc_round
+
+#include "../integer.hpp"
+#include "../ext/vector_integer.hpp"
+
+namespace glm{
+namespace detail
+{
+	template<bool is_float, bool is_signed>
+	struct compute_roundMultiple {};
+
+	template<>
+	struct compute_roundMultiple<true, true>
+	{
+		template<typename genType>
+		GLM_FUNC_QUALIFIER static genType call(genType Source, genType Multiple)
+		{
+			if (Source >= genType(0))
+				return Source - std::fmod(Source, Multiple);
+			else
+			{
+				genType Tmp = Source + genType(1);
+				return Tmp - std::fmod(Tmp, Multiple) - Multiple;
+			}
+		}
+	};
+
+	template<>
+	struct compute_roundMultiple<false, false>
+	{
+		template<typename genType>
+		GLM_FUNC_QUALIFIER static genType call(genType Source, genType Multiple)
+		{
+			if (Source >= genType(0))
+				return Source - Source % Multiple;
+			else
+			{
+				genType Tmp = Source + genType(1);
+				return Tmp - Tmp % Multiple - Multiple;
+			}
+		}
+	};
+
+	template<>
+	struct compute_roundMultiple<false, true>
+	{
+		template<typename genType>
+		GLM_FUNC_QUALIFIER static genType call(genType Source, genType Multiple)
+		{
+			if (Source >= genType(0))
+				return Source - Source % Multiple;
+			else
+			{
+				genType Tmp = Source + genType(1);
+				return Tmp - Tmp % Multiple - Multiple;
+			}
+		}
+	};
+}//namespace detail
+
+	//////////////////
+	// ceilPowerOfTwo
+
+	template<typename genType>
+	GLM_FUNC_QUALIFIER genType ceilPowerOfTwo(genType value)
+	{
+		return detail::compute_ceilPowerOfTwo<1, genType, defaultp, std::numeric_limits<genType>::is_signed>::call(vec<1, genType, defaultp>(value)).x;
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> ceilPowerOfTwo(vec<L, T, Q> const& v)
+	{
+		return detail::compute_ceilPowerOfTwo<L, T, Q, std::numeric_limits<T>::is_signed>::call(v);
+	}
+
+	///////////////////
+	// floorPowerOfTwo
+
+	template<typename genType>
+	GLM_FUNC_QUALIFIER genType floorPowerOfTwo(genType value)
+	{
+		return isPowerOfTwo(value) ? value : static_cast<genType>(1) << findMSB(value);
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> floorPowerOfTwo(vec<L, T, Q> const& v)
+	{
+		return detail::functor1<vec, L, T, T, Q>::call(floorPowerOfTwo, v);
+	}
+
+	///////////////////
+	// roundPowerOfTwo
+
+	template<typename genIUType>
+	GLM_FUNC_QUALIFIER genIUType roundPowerOfTwo(genIUType value)
+	{
+		if(isPowerOfTwo(value))
+			return value;
+
+		genIUType const prev = static_cast<genIUType>(1) << findMSB(value);
+		genIUType const next = prev << static_cast<genIUType>(1);
+		return (next - value) < (value - prev) ? next : prev;
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> roundPowerOfTwo(vec<L, T, Q> const& v)
+	{
+		return detail::functor1<vec, L, T, T, Q>::call(roundPowerOfTwo, v);
+	}
+
+	//////////////////////
+	// ceilMultiple
+
+	template<typename genType>
+	GLM_FUNC_QUALIFIER genType ceilMultiple(genType Source, genType Multiple)
+	{
+		return detail::compute_ceilMultiple<std::numeric_limits<genType>::is_iec559, std::numeric_limits<genType>::is_signed>::call(Source, Multiple);
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> ceilMultiple(vec<L, T, Q> const& Source, vec<L, T, Q> const& Multiple)
+	{
+		return detail::functor2<vec, L, T, Q>::call(ceilMultiple, Source, Multiple);
+	}
+
+	//////////////////////
+	// floorMultiple
+
+	template<typename genType>
+	GLM_FUNC_QUALIFIER genType floorMultiple(genType Source, genType Multiple)
+	{
+		return detail::compute_floorMultiple<std::numeric_limits<genType>::is_iec559, std::numeric_limits<genType>::is_signed>::call(Source, Multiple);
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> floorMultiple(vec<L, T, Q> const& Source, vec<L, T, Q> const& Multiple)
+	{
+		return detail::functor2<vec, L, T, Q>::call(floorMultiple, Source, Multiple);
+	}
+
+	//////////////////////
+	// roundMultiple
+
+	template<typename genType>
+	GLM_FUNC_QUALIFIER genType roundMultiple(genType Source, genType Multiple)
+	{
+		return detail::compute_roundMultiple<std::numeric_limits<genType>::is_iec559, std::numeric_limits<genType>::is_signed>::call(Source, Multiple);
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> roundMultiple(vec<L, T, Q> const& Source, vec<L, T, Q> const& Multiple)
+	{
+		return detail::functor2<vec, L, T, Q>::call(roundMultiple, Source, Multiple);
+	}
+}//namespace glm