healpix_to_xyz¶
- astropy_healpix.healpix_to_xyz(healpix_index, nside, dx=None, dy=None, order='ring')[source]¶
Convert HEALPix indices (optionally with offsets) to Cartesian coordinates.
If no offsets (
dx
anddy
) are provided, the coordinates will default to those at the center of the HEALPix pixels.- Parameters:
- healpix_indexint or
ndarray
HEALPix indices (as a scalar or array)
- nsideint or
ndarray
Number of pixels along the side of each of the 12 top-level HEALPix tiles
- dx, dyfloat or
ndarray
, optional Offsets inside the HEALPix pixel, which must be in the range [0:1], where 0.5 is the center of the HEALPix pixels (as scalars or arrays)
- order{ ‘nested’ | ‘ring’ }, optional
Order of HEALPix pixels
- healpix_indexint or
- Returns:
- x, y, zfloat or
ndarray
The Cartesian coordinate components
- x, y, zfloat or