Function acap::cos::prenorm_cosine_similarity

pub fn prenorm_cosine_similarity<T, U>(x: T, y: U) -> T::Value where
    T: Coordinates,
    U: Coordinates<Value = T::Value>,
    T::Value: Real, 

Compute the cosine similarity between two pre-normalized (unit magnitude) points.

Use prenorm_cosine_distance() instead if you are implementing Proximity::distance().

\begin{aligned}
\mathrm{prenorm\_cosine\_similarity}(x, y) &= x \cdot y \\
&= \sum_i x_i y_i \\
&= \cos \theta
\end{aligned}