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Merge pull request #599 from Matiis/master

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Quaternion pitch/eulerAngles singularity handling #599
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Christophe 2017-01-07 14:33:14 +01:00 committed by GitHub
commit c8ddeea744
1 changed files with 7 additions and 1 deletions
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8
glm/gtc/quaternion.inl
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@ -574,7 +574,13 @@ namespace detail
template<typename T, precision P> template<typename T, precision P>
GLM_FUNC_QUALIFIER T pitch(tquat<T, P> const & q) GLM_FUNC_QUALIFIER T pitch(tquat<T, P> const & q)
{ {
return T(atan(T(2) * (q.y * q.z + q.w * q.x), q.w * q.w - q.x * q.x - q.y * q.y + q.z * q.z)); //return T(atan(T(2) * (q.y * q.z + q.w * q.x), q.w * q.w - q.x * q.x - q.y * q.y + q.z * q.z));
const T y = T(2) * (q.y * q.z + q.w * q.x);
const T x = q.w * q.w - q.x * q.x - q.y * q.y + q.z * q.z;
if(y == T(0) && x == T(0)) //avoid atan2(0,0) - handle singularity - Matiis
return T(T(2)*atan(q.x,q.w));
return T(atan(y,x));
} }
template<typename T, precision P> template<typename T, precision P>