Function point_to_anchor 

pub fn point_to_anchor(
    point: &[f64; 3],
    level: usize,
    origin: &[f64; 3],
    diameter: &[f64; 3],
) -> [usize; 4]

Map a point to the integer coordinates of its enclosing box.

Returns the 3 integeger coordinates of the enclosing box.

Arguments

point - The (x, y, z) coordinates of the point to map. level - The level of the tree at which the point will be mapped. origin - The origin of the bounding box. diameter - The diameter of the bounding box in each dimension.