Function encode_point 

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

Encode a point.

Return the Morton key of a point for a given level.

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.