healpix_routines.f90 File Reference

Modules
module	healpix_routines
	Contains slightly modified subroutines from the Healpix package.

Functions/Subroutines
subroutine	healpix_routines::pix2ang_nest (nside, ipix, theta, phi)
	renders theta and phi coordinates of the nominal pixel center for the pixel number ipix (NESTED scheme) given the map resolution parameter nside More...
subroutine	healpix_routines::mk_pix2xy ()
	constructs the array giving x and y in the face from pixel number for the nested (quad-cube like) ordering of pixels the bits corresponding to x and y are interleaved in the pixel number one breaks up the pixel number by even and odd bits More...
integer(kind=int64) function	healpix_routines::nside2npix (nside)
	given nside, returns npix such that npix = 12*nside^2 nside should be a power of 2 smaller than ns_max if not, -1 is returned. More...
character(len=lch) function	healpix_routines::string_i (arg, format)
subroutine	healpix_routines::ang2pix_nest (nside, theta, phi, ipix)
	renders the pixel number ipix (NESTED scheme) for a pixel which contains a point on a sphere at coordinates theta and phi, given the map resolution parameter nside. More...
subroutine	healpix_routines::mk_xy2pix1 ()
subroutine	healpix_routines::neighbours_nest (nside, ipix, n, nneigh)
	Returns list n(8) of neighbours of pixel ipix (in NESTED scheme) the neighbours are ordered in the following way: First pixel is the one to the south (the one west of the south direction is taken for the pixels which don't have a southern neighbour). From then on the neighbours are ordered in the clockwise direction about the pixel with number ipix. More...
subroutine	healpix_routines::xy2pix_nest (nside, ix_in, iy_in, face_num, ipix)
subroutine	healpix_routines::pix2xy_nest (nside, ipf_in, ix, iy)
	gives the x, y coords in a face from pixel number within the face (NESTED) More...
integer(int32) function	healpix_routines::swaplsbmsb (i)
	Returns i with even and odd bit positions interchanged. More...
integer(int32) function	healpix_routines::invmsb (i)
	Returns i with even (0,2,4,...) bits inverted. More...
integer(int32) function	healpix_routines::invlsb (i)
	Returns i with odd (1,3,5,...) bits inverted. More...

Variables
integer(kind=int32), dimension(0:1023), save, private	healpix_routines::pix2x =0
integer(kind=int32), dimension(0:1023), save, private	healpix_routines::pix2y =0
integer(kind=int32), dimension(0:127), save, private	healpix_routines::x2pix1 =0
integer(kind=int32), dimension(0:127), save, private	healpix_routines::y2pix1 =0
character(len=3000)	healpix_routines::string
integer, parameter, private	healpix_routines::lch =48
integer(kind=int32), parameter, private	healpix_routines::ns_max4 =8192
integer(kind=int32), parameter, private	healpix_routines::ns_max =ns_max4
integer(int32), parameter	healpix_routines::oddbits =89478485
integer(int32), parameter	healpix_routines::evenbits =178956970
real(kind=real64), parameter, private	healpix_routines::halfpi =asin(1.)
real(kind=real64), parameter, private	healpix_routines::pi =2*halfpi
real(kind=real64), parameter, private	healpix_routines::twopi = 2*pi
real(kind=real64), parameter, private	healpix_routines::twothird =2./3.