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Fixed roundEven implementation, tests are now passing

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This commit is contained in:
Christophe Riccio
2011-10-20 18:13:07 +01:00
parent 774bd01b92
commit 6c00ffa1b4
2 changed files with 46 additions and 37 deletions
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21
glm/core/func_common.inl
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@@ -148,18 +148,21 @@ namespace detail
*/
// roundEven
template <typename genType>
GLM_FUNC_QUALIFIER genType roundEven(genType const& x)
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));
}
int Integer = int(x);
genType IntegerPart = genType(Integer);
genType FractionalPart = fract(x);
if(FractionalPart > genType(0.5) || FractionalPart < genType(0.5))
return round(x);
else if(!(Integer % 2))
return IntegerPart;
else
return IntegerPart + mix(genType(-1), genType(1), x >= genType(0));
}
VECTORIZE_VEC(roundEven)