Function skeletal_animation::math::col_mat4_mul_col

pub fn col_mat4_mul_col<T>(a: [[T; 4]; 4], b: [[T; 4]; 4], i: usize) -> [T; 4] where
    T: Copy + Add<T, Output = T> + Mul<T, Output = T>, 

Computes column vector in column matrix product.

The semantics of the order is the same as for row matrices.