Contains slightly modified subroutines from the Healpix package. More...

Functions/Subroutines
subroutine	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	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	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	string_i (arg, format)

subroutine	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	mk_xy2pix1 ()

subroutine	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	xy2pix_nest (nside, ix_in, iy_in, face_num, ipix)

subroutine	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	swaplsbmsb (i)
	Returns i with even and odd bit positions interchanged. More...

integer(int32) function	invmsb (i)
	Returns i with even (0,2,4,...) bits inverted. More...

integer(int32) function	invlsb (i)
	Returns i with odd (1,3,5,...) bits inverted. More...

Variables
integer(kind=int32), dimension(0:1023), save, private	pix2x =0

integer(kind=int32), dimension(0:1023), save, private	pix2y =0

integer(kind=int32), dimension(0:127), save, private	x2pix1 =0

integer(kind=int32), dimension(0:127), save, private	y2pix1 =0

character(len=3000)	string

integer, parameter, private	lch =48

integer(kind=int32), parameter, private	ns_max4 =8192

integer(kind=int32), parameter, private	ns_max =ns_max4

integer(int32), parameter	oddbits =89478485

integer(int32), parameter	evenbits =178956970

real(kind=real64), parameter, private	halfpi =asin(1.)

real(kind=real64), parameter, private	pi =2*halfpi

real(kind=real64), parameter, private	twopi = 2*pi

real(kind=real64), parameter, private	twothird =2./3.

Detailed Description

Contains slightly modified subroutines from the Healpix package.

Function/Subroutine Documentation

subroutine healpix_routines::ang2pix_nest	(	integer(kind=int32), intent(in)	nside,
		real(kind=real64), intent(in)	theta,
		real(kind=real64), intent(in)	phi,
		integer(kind=int32), intent(out)	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.

Here is the call graph for this function:

Here is the caller graph for this function:

integer(int32) function healpix_routines::invlsb ( integer(int32), intent(in) i )

Returns i with odd (1,3,5,...) bits inverted.

Here is the caller graph for this function:

integer(int32) function healpix_routines::invmsb ( integer(int32), intent(in) i )

Returns i with even (0,2,4,...) bits inverted.

Here is the caller graph for this function:

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

Here is the caller graph for this function:

subroutine healpix_routines::mk_xy2pix1 ( )

Here is the caller graph for this function:

subroutine healpix_routines::neighbours_nest	(	integer(kind=int32), intent(in)	nside,
		integer(kind=int32), intent(in)	ipix,
		integer(kind=int32), dimension(1:), intent(out)	n,
		integer(kind=int32), intent(out)	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.

nneigh is the number of neighbours (mostly 8, 8 pixels have 7 neighbours)

Here is the call graph for this function:

integer(kind=int64) function healpix_routines::nside2npix ( integer(kind=int32), intent(in) 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.

Here is the call graph for this function:

Here is the caller graph for this function:

subroutine healpix_routines::pix2ang_nest	(	integer(kind=int32), intent(in)	nside,
		integer(kind=int32), intent(in)	ipix,
		real(kind=real64), intent(out)	theta,
		real(kind=real64), intent(out)	phi
	)

renders theta and phi coordinates of the nominal pixel center for the pixel number ipix (NESTED scheme) given the map resolution parameter nside

Here is the call graph for this function:

Here is the caller graph for this function:

subroutine healpix_routines::pix2xy_nest	(	integer(kind=int32), intent(in)	nside,
		integer(kind=int32), intent(in)	ipf_in,
		integer(kind=int32), intent(out)	ix,
		integer(kind=int32), intent(out)	iy
	)

gives the x, y coords in a face from pixel number within the face (NESTED)

Here is the call graph for this function:

Here is the caller graph for this function:

character(len=lch) function healpix_routines::string_i	(	integer(int32)	arg,
		character(len=*), optional	format
	)

Here is the caller graph for this function:

integer(int32) function healpix_routines::swaplsbmsb ( integer(int32), intent(in) i )

Returns i with even and odd bit positions interchanged.

Here is the caller graph for this function:

subroutine healpix_routines::xy2pix_nest	(	integer(kind=int32), intent(in)	nside,
		integer(kind=int32), intent(in)	ix_in,
		integer(kind=int32), intent(in)	iy_in,
		integer(kind=int32), intent(in)	face_num,
		integer(kind=int32), intent(out)	ipix
	)

Here is the call graph for this function:

Here is the caller graph for this function:

Variable Documentation

integer(int32), parameter healpix_routines::evenbits =178956970

real(kind=real64), parameter, private healpix_routines::halfpi =asin(1.)

private

integer, parameter, private healpix_routines::lch =48

private

integer(kind=int32), parameter, private healpix_routines::ns_max =ns_max4

private

integer(kind=int32), parameter, private healpix_routines::ns_max4 =8192

private

integer(int32), parameter healpix_routines::oddbits =89478485

real(kind=real64), parameter, private healpix_routines::pi =2*halfpi

private

integer(kind=int32), dimension(0:1023), save, private healpix_routines::pix2x =0

private

integer(kind=int32), dimension(0:1023), save, private healpix_routines::pix2y =0

private

character(len=3000) healpix_routines::string

real(kind=real64), parameter, private healpix_routines::twopi = 2*pi

private

real(kind=real64), parameter, private healpix_routines::twothird =2./3.

private

integer(kind=int32), dimension(0:127), save, private healpix_routines::x2pix1 =0

private

integer(kind=int32), dimension(0:127), save, private healpix_routines::y2pix1 =0

private

Functions/Subroutines

Variables

Detailed Description

Function/Subroutine Documentation

Variable Documentation