Package cds.healpix

Interface HashComputerWithAux

All Superinterfaces:
HierarchyItem

public interface HashComputerWithAux extends HierarchyItem
Compute an HEALPix hash value additionaly taking a 3rd dimension (the auxiliary axis).
Author:
F.-X. Pineau
  • Method Summary

    Modifier and Type
    Method
    Description
    int
    Returns the depth of the hash computed by hash(double, double, double) method.
    long
    hash(double lonRad, double latRad, double auxValue)
    Returns the HEALPix hash value of the given coordinate at this object depth.
  • Method Details

    • depth

      int depth()
      Returns the depth of the hash computed by hash(double, double, double) method.
      Specified by:
      depth in interface HierarchyItem
      Returns:
      the depth of the hash computed by hash(double, double, double) method.
    • hash

      long hash(double lonRad, double latRad, double auxValue)
      Returns the HEALPix hash value of the given coordinate at this object depth. WARNING: depending on the implementation, this method may or may not be thread-safe.
      Parameters:
      lonRad - longitude in radians, must support reasonably large positive and negative values producing accurate results with a naive range reduction like modulo 2*pi (i.e. without having to resort on Cody-Waite or Payne Hanek range reduction).
      latRad - latitude in [-pi/2, pi/2] radians
      auxValue - value on the 3rd (the auxiliary) axis.
      Returns:
      the hash value associated to the given coordinate, at this object depth.