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Added experiments and tests for roundEven

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This commit is contained in:
Christophe Riccio
2011-09-17 11:12:35 +01:00
parent 472174a206
commit cc48ab3697
3 changed files with 175 additions and 110 deletions
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19
glm/core/func_common.inl
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@@ -268,7 +268,7 @@ namespace detail
round(x.z),
round(x.w));
}
/*
// roundEven
template <typename genType>
GLM_FUNC_QUALIFIER genType roundEven(genType const& x)
@@ -277,7 +277,22 @@ namespace detail
return genType(int(x + genType(int(x) % 2)));
}
*/
// roundEven
template <typename genType>
GLM_FUNC_QUALIFIER genType roundEven(genType const& x)
{
GLM_STATIC_ASSERT(detail::type<genType>::is_float, "'roundEven' only accept floating-point inputs");
genType RoundValue(0.5);
if(fract(x) == genType(0.5) && int(x) % 2)
RoundValue = genType(-0.5);
if(x < genType(0.0))
return genType(int(x - RoundValue));
return genType(int(x + RoundValue));
}
template <typename valType>
GLM_FUNC_QUALIFIER detail::tvec2<valType> roundEven(detail::tvec2<valType> const& x)
{