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Updated GTX_multiple

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This commit is contained in:
Christophe Riccio 2014-11-01 03:00:42 +01:00
parent 4b4b6f6cac
commit 23d2735e03
2 changed files with 103 additions and 64 deletions
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24
glm/gtx/multiple.hpp
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@ -62,6 +62,18 @@ namespace glm
genType Source,
genType Multiple);
/// Higher multiple number of Source.
///
/// @tparam genType Floating-point or integer scalar or vector types.
/// @param Source
/// @param Multiple Must be a null or positive value
///
/// @see gtx_multiple
template <typename T, precision P, template <typename, precision> class vecType>
GLM_FUNC_DECL vecType<T, P> higherMultiple(
vecType<T, P> const & Source,
vecType<T, P> const & Multiple);
/// Lower multiple number of Source.
///
/// @tparam genType Floating-point or integer scalar or vector types.
@ -74,6 +86,18 @@ namespace glm
genType Source,
genType Multiple);
/// Lower multiple number of Source.
///
/// @tparam genType Floating-point or integer scalar or vector types.
/// @param Source
/// @param Multiple Must be a null or positive value
///
/// @see gtx_multiple
template <typename T, precision P, template <typename, precision> class vecType>
GLM_FUNC_DECL vecType<T, P> lowerMultiple(
vecType<T, P> const & Source,
vecType<T, P> const & Multiple);
/// @}
}//namespace glm

143
glm/gtx/multiple.inl
View File

@ -13,11 +13,41 @@
namespace glm{
namespace detail
{
template <bool Signed>
struct higherMultiple
template <bool is_float, bool is_signed>
struct compute_higherMultiple{};
template <>
struct compute_higherMultiple<true, true>
{
template <typename genType>
GLM_FUNC_QUALIFIER genType operator()(genType Source, genType Multiple)
GLM_FUNC_QUALIFIER static genType call(genType Source, genType Multiple)
{
if(Source > genType(0))
{
genType Tmp = Source - genType(1);
return Tmp + (Multiple - std::fmod(Tmp, Multiple));
}
else
return Source + std::fmod(-Source, Multiple);
}
};
template <>
struct compute_higherMultiple<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_higherMultiple<false, true>
{
template <typename genType>
GLM_FUNC_QUALIFIER static genType call(genType Source, genType Multiple)
{
if(Source > genType(0))
{
@ -29,14 +59,54 @@ namespace detail
}
};
template <bool is_float, bool is_signed>
struct compute_lowerMultiple{};
template <>
struct higherMultiple<false>
struct compute_lowerMultiple<true, true>
{
template <typename genType>
GLM_FUNC_QUALIFIER genType operator()(genType Source, genType Multiple)
GLM_FUNC_QUALIFIER static genType call(genType Source, genType Multiple)
{
genType Tmp = Source - genType(1);
return Tmp + (Multiple - (Tmp % 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_lowerMultiple<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_lowerMultiple<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
@ -47,32 +117,7 @@ namespace detail
template <typename genType>
GLM_FUNC_QUALIFIER genType higherMultiple(genType Source, genType Multiple)
{
detail::higherMultiple<std::numeric_limits<genType>::is_signed> Compute;
return Compute(Source, Multiple);
}
template <>
GLM_FUNC_QUALIFIER float higherMultiple(float Source, float Multiple)
{
if(Source > float(0))
{
float Tmp = Source - float(1);
return Tmp + (Multiple - std::fmod(Tmp, Multiple));
}
else
return Source + std::fmod(-Source, Multiple);
}
template <>
GLM_FUNC_QUALIFIER double higherMultiple(double Source, double Multiple)
{
if(Source > double(0))
{
double Tmp = Source - double(1);
return Tmp + (Multiple - std::fmod(Tmp, Multiple));
}
else
return Source + std::fmod(-Source, Multiple);
return detail::compute_higherMultiple<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>
@ -87,37 +132,7 @@ namespace detail
template <typename genType>
GLM_FUNC_QUALIFIER genType lowerMultiple(genType Source, genType Multiple)
{
if(Source >= genType(0))
return Source - Source % Multiple;
else
{
genType Tmp = Source + genType(1);
return Tmp - Tmp % Multiple - Multiple;
}
}
template <>
GLM_FUNC_QUALIFIER float lowerMultiple(float Source, float Multiple)
{
if(Source >= float(0))
return Source - std::fmod(Source, Multiple);
else
{
float Tmp = Source + float(1);
return Tmp - std::fmod(Tmp, Multiple) - Multiple;
}
}
template <>
GLM_FUNC_QUALIFIER double lowerMultiple(double Source, double Multiple)
{
if (Source >= double(0))
return Source - std::fmod(Source, Multiple);
else
{
double Tmp = Source + double(1);
return Tmp - std::fmod(Tmp, Multiple) - Multiple;
}
return detail::compute_lowerMultiple<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>