Function nalgebra_glm::reflect_vec

pub fn reflect_vec<N: Number, D: Dimension>(
    i: &TVec<N, D>, 
    n: &TVec<N, D>
) -> TVec<N, D> where
    DefaultAllocator: Alloc<N, D>, 

For the incident vector i and surface orientation n, returns the reflection direction : result = i - 2.0 * dot(n, i) * n.