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Diffstat (limited to 'external/include/glm/gtc/round.inl')
| -rw-r--r-- | external/include/glm/gtc/round.inl | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/external/include/glm/gtc/round.inl b/external/include/glm/gtc/round.inl new file mode 100644 index 0000000..f583c40 --- /dev/null +++ b/external/include/glm/gtc/round.inl @@ -0,0 +1,344 @@ +/// @ref gtc_round +/// @file glm/gtc/round.inl + +#include "../detail/func_integer.hpp" + +namespace glm{ +namespace detail +{ + template <typename T, precision P, template <typename, precision> class vecType, bool compute = false> + struct compute_ceilShift + { + GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & v, T) + { + return v; + } + }; + + template <typename T, precision P, template <typename, precision> class vecType> + struct compute_ceilShift<T, P, vecType, true> + { + GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & v, T Shift) + { + return v | (v >> Shift); + } + }; + + template <typename T, precision P, template <typename, precision> class vecType, bool isSigned = true> + struct compute_ceilPowerOfTwo + { + GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & x) + { + GLM_STATIC_ASSERT(!std::numeric_limits<T>::is_iec559, "'ceilPowerOfTwo' only accept integer scalar or vector inputs"); + + vecType<T, P> const Sign(sign(x)); + + vecType<T, P> v(abs(x)); + + v = v - static_cast<T>(1); + v = v | (v >> static_cast<T>(1)); + v = v | (v >> static_cast<T>(2)); + v = v | (v >> static_cast<T>(4)); + v = compute_ceilShift<T, P, vecType, sizeof(T) >= 2>::call(v, 8); + v = compute_ceilShift<T, P, vecType, sizeof(T) >= 4>::call(v, 16); + v = compute_ceilShift<T, P, vecType, sizeof(T) >= 8>::call(v, 32); + return (v + static_cast<T>(1)) * Sign; + } + }; + + template <typename T, precision P, template <typename, precision> class vecType> + struct compute_ceilPowerOfTwo<T, P, vecType, false> + { + GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & x) + { + GLM_STATIC_ASSERT(!std::numeric_limits<T>::is_iec559, "'ceilPowerOfTwo' only accept integer scalar or vector inputs"); + + vecType<T, P> v(x); + + v = v - static_cast<T>(1); + v = v | (v >> static_cast<T>(1)); + v = v | (v >> static_cast<T>(2)); + v = v | (v >> static_cast<T>(4)); + v = compute_ceilShift<T, P, vecType, sizeof(T) >= 2>::call(v, 8); + v = compute_ceilShift<T, P, vecType, sizeof(T) >= 4>::call(v, 16); + v = compute_ceilShift<T, P, vecType, sizeof(T) >= 8>::call(v, 32); + return v + static_cast<T>(1); + } + }; + + template <bool is_float, bool is_signed> + struct compute_ceilMultiple{}; + + template <> + struct compute_ceilMultiple<true, true> + { + template <typename genType> + GLM_FUNC_QUALIFIER static genType call(genType Source, genType Multiple) + { + if(Source > genType(0)) + return Source + (Multiple - std::fmod(Source, Multiple)); + else + return Source + std::fmod(-Source, Multiple); + } + }; + + template <> + struct compute_ceilMultiple<false, false> + { + template <typename genType> + GLM_FUNC_QUALIFIER static genType call(genType Source, genType Multiple) + { + genType Tmp = Source - genType(1); + return Tmp + (Multiple - (Tmp % Multiple)); + } + }; + + template <> + struct compute_ceilMultiple<false, true> + { + template <typename genType> + GLM_FUNC_QUALIFIER static genType call(genType Source, genType Multiple) + { + if(Source > genType(0)) + { + genType Tmp = Source - genType(1); + return Tmp + (Multiple - (Tmp % Multiple)); + } + else + return Source + (-Source % Multiple); + } + }; + + template <bool is_float, bool is_signed> + struct compute_floorMultiple{}; + + template <> + struct compute_floorMultiple<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 + return Source - std::fmod(Source, Multiple) - Multiple; + } + }; + + template <> + struct compute_floorMultiple<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_floorMultiple<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; + } + } + }; + + 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 + + //////////////// + // isPowerOfTwo + + template <typename genType> + GLM_FUNC_QUALIFIER bool isPowerOfTwo(genType Value) + { + genType const Result = glm::abs(Value); + return !(Result & (Result - 1)); + } + + template <typename T, precision P, template <typename, precision> class vecType> + GLM_FUNC_QUALIFIER vecType<bool, P> isPowerOfTwo(vecType<T, P> const & Value) + { + vecType<T, P> const Result(abs(Value)); + return equal(Result & (Result - 1), vecType<T, P>(0)); + } + + ////////////////// + // ceilPowerOfTwo + + template <typename genType> + GLM_FUNC_QUALIFIER genType ceilPowerOfTwo(genType value) + { + return detail::compute_ceilPowerOfTwo<genType, defaultp, tvec1, std::numeric_limits<genType>::is_signed>::call(tvec1<genType, defaultp>(value)).x; + } + + template <typename T, precision P, template <typename, precision> class vecType> + GLM_FUNC_QUALIFIER vecType<T, P> ceilPowerOfTwo(vecType<T, P> const & v) + { + return detail::compute_ceilPowerOfTwo<T, P, vecType, 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 <typename T, precision P, template <typename, precision> class vecType> + GLM_FUNC_QUALIFIER vecType<T, P> floorPowerOfTwo(vecType<T, P> const & v) + { + return detail::functor1<T, T, P, vecType>::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 <typename T, precision P, template <typename, precision> class vecType> + GLM_FUNC_QUALIFIER vecType<T, P> roundPowerOfTwo(vecType<T, P> const & v) + { + return detail::functor1<T, T, P, vecType>::call(roundPowerOfTwo, v); + } + + //////////////// + // isMultiple + + template <typename genType> + GLM_FUNC_QUALIFIER bool isMultiple(genType Value, genType Multiple) + { + return isMultiple(tvec1<genType>(Value), tvec1<genType>(Multiple)).x; + } + + template <typename T, precision P, template <typename, precision> class vecType> + GLM_FUNC_QUALIFIER vecType<bool, P> isMultiple(vecType<T, P> const & Value, T Multiple) + { + return (Value % Multiple) == vecType<T, P>(0); + } + + template <typename T, precision P, template <typename, precision> class vecType> + GLM_FUNC_QUALIFIER vecType<bool, P> isMultiple(vecType<T, P> const & Value, vecType<T, P> const & Multiple) + { + return (Value % Multiple) == vecType<T, P>(0); + } + + ////////////////////// + // 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 <typename T, precision P, template <typename, precision> class vecType> + GLM_FUNC_QUALIFIER vecType<T, P> ceilMultiple(vecType<T, P> const & Source, vecType<T, P> const & Multiple) + { + return detail::functor2<T, P, vecType>::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 <typename T, precision P, template <typename, precision> class vecType> + GLM_FUNC_QUALIFIER vecType<T, P> floorMultiple(vecType<T, P> const & Source, vecType<T, P> const & Multiple) + { + return detail::functor2<T, P, vecType>::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 <typename T, precision P, template <typename, precision> class vecType> + GLM_FUNC_QUALIFIER vecType<T, P> roundMultiple(vecType<T, P> const & Source, vecType<T, P> const & Multiple) + { + return detail::functor2<T, P, vecType>::call(roundMultiple, Source, Multiple); + } +}//namespace glm |