Function regular_octree 

pub fn regular_octree<T: RealType>(
    particles: ArrayView2<'_, T>,
    max_level: usize,
) -> Octree<'_, T>

Create a regular Octree.

Returns a RegularOctree struct describing a regular octree.

Arguments

• particles - A (3, N) array of particles of type f32 or f64.
• max_level - The maximum level of the tree.