DART-Ray
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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. |
Contains slightly modified subroutines from the Healpix package.
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.
integer(int32) function healpix_routines::invlsb | ( | integer(int32), intent(in) | i | ) |
Returns i with odd (1,3,5,...) bits inverted.
integer(int32) function healpix_routines::invmsb | ( | integer(int32), intent(in) | i | ) |
Returns i with even (0,2,4,...) bits inverted.
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
subroutine healpix_routines::mk_xy2pix1 | ( | ) |
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)
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.
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
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)
character(len=lch) function healpix_routines::string_i | ( | integer(int32) | arg, |
character(len=*), optional | format | ||
) |
integer(int32) function healpix_routines::swaplsbmsb | ( | integer(int32), intent(in) | i | ) |
Returns i with even and odd bit positions interchanged.
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 | ||
) |
integer(int32), parameter healpix_routines::evenbits =178956970 |
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integer(int32), parameter healpix_routines::oddbits =89478485 |
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character(len=3000) healpix_routines::string |
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