/usr/include/astrometry/healpix-utils.h is in libastrometry-dev 0.70+dfsg-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | /*
# This file is part of the Astrometry.net suite.
# Licensed under a 3-clause BSD style license - see LICENSE
*/
#ifndef HEALPIX_UTILS_H
#define HEALPIX_UTILS_H
#include "astrometry/bl.h"
/**
Returns healpixes that are / may be within range of the given point, resp.
*/
il* healpix_rangesearch_xyz(const double* xyz, double radius, int Nside, il* hps);
il* healpix_rangesearch_xyz_approx(const double* xyz, double radius, int Nside, il* hps);
il* healpix_rangesearch_radec_approx(double ra, double dec, double radius, int Nside, il* hps);
il* healpix_rangesearch_radec(double ra, double dec, double radius, int Nside, il* hps);
/**
Starting from a "seed" or list of "seeds" healpixes, grows a region
by looking at healpix neighbours. Accepts healpixes for which the
"accept" function returns 1. Returns the healpixes that are
accepted. The accepted results are placed in "accepted", if
non-NULL, or in a newly-allocated list.
If "rejected" is non-NULL, the healpixes that are rejected will be
put there.
If "depth" is non-zero, that number of neighbour steps will be taken.
Zero means no limit.
NOTE that any existing entries in the "accepted" list will be treated
as having already been accepted: when the search reaches them, their
neighbours will not be added to the frontier to explore.
*/
il* healpix_region_search(int seed, il* seeds, int Nside,
il* accepted, il* rejected,
int (*accept)(int hp, void* token),
void* token,
int depth);
#endif
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