[−][src]Function cdshealpix::nside_square
pub fn nside_square(delta_depth: u8) -> u64
Returns, for the given difference of depth, the number of cells small cells the large cell contains. If the small cell level is 0, the result is the sqaured nside.
Input
delta_depth
must be in[0, 29]
Output
nside^2
= 2^2*delta_depth
Panics
If delta_depth
is not in [0, 29]
.
Examples
use cdshealpix::{nside_square}; for delta_depth in 0..29_u8 { assert_eq!(2u64.pow(2 * delta_depth as u32), nside_square(delta_depth)); }