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program testtrangrid
implicit none
include 'SAE_PAR'
include 'AST_PAR'
include 'PRM_PAR'
integer status, i, m, outp(4), inp(4), c1, c2, c3, c4, fc, fs
double precision at(4), r, mat(4), b1(2), b2(2), a1(2),
: a2(4)
character cards(9)*80
status = sai__ok
at(1) = 10.0D0
at(2) = 1.2D6
* UnitMap
m = ast_unitmap( 2, ' ', status )
call testmap( m, 1, 0.5D0, status )
* ZoomMap
m = ast_zoommap( 2, 2.0D0, ' ', status )
call testmap( m, 2, 0.5D0, status )
* MatrixMap
m = ast_matrixmap( 2, 2, 2, mat, ' ', status )
call testmap( m, 3, 0.5D0, status )
* PermMap
outp(1)=2
outp(2)=1
inp(1)=2
inp(2)=1
m = ast_permmap( 2, inp, 2, outp, 0.0D0, ' ', status )
call testmap( m, 4, 0.5D0, status )
* TranMap
a1( 1 ) = 0.0D0
a1( 2 ) = 0.0D0
a2( 1 ) = 1.0D0
a2( 2 ) = 1.0D0
b1( 1 ) = 0.5D0
b1( 2 ) = 0.5D0
b2( 1 ) = 2.5D0
b2( 2 ) = 2.5D0
c1 = ast_winmap( 2, a1, a2, b1, b2, ' ', status )
c2 = ast_copy( c1, status )
m = ast_tranmap( c1, c2, ' ', status )
call testmap( m, 5, 0.5D0, status )
* 3D CmpMap
mat(1) = -1.0D0
c1 = ast_shiftmap( 1, mat, ' ', status )
mat(1)= 1.0D0
mat(2)= 2.0D0
mat(3)= -2.0D0
mat(4)= 3.0D0
c2 = ast_matrixmap( 2, 2, 0, mat, ' ', status )
c3 = ast_cmpmap( c1, c2, 0, ' ', status )
outp(1) = 3
outp(2) = 2
outp(3) = 1
inp(1) = 3
inp(2) = 2
inp(3) = 1
c1 = ast_permmap( 3, inp, 3, outp, 0.0D0, ' ', status )
c2 = ast_ZoomMap( 3, 0.25D0, ' ', status )
call ast_invert( c2, status )
c4 = ast_cmpmap( c1, c2, 1, ' ', status )
call ast_invert( c4, status )
m = ast_cmpmap( c3, c4, 1, ' ', status )
call testmap( m, 6, 0.5D0, status )
* 1D non-linear Mapping
m = ast_mathmap( 1, 1, 1, 'y=x**3', 1,
: 'x=sign((abs(y)**(1/3)),y)', ' ', status )
call testmap( m, 7, 0.0001D0, status )
* A FITS-WCS pixel->sky mapping
cards(1) = 'CTYPE1 = ''RA---TAN'''
cards(2) = 'CTYPE2 = ''DEC--TAN'''
cards(3) = 'CRPIX1 = 20'
cards(4) = 'CRPIX2 = 20'
cards(5) = 'CRVAL1 = 0.0'
cards(6) = 'CRVAL2 = 0.0'
cards(7) = 'CROTA1 = 30.0'
cards(8) = 'CDELT1 = -0.001'
cards(9) = 'CDELT2 = 0.001'
fc = ast_fitschan( ast_null, ast_null, ' ', status )
do i = 1, 9
call ast_putfits( fc, cards(i), .false., status )
end do
call ast_clear( fc, 'card', status )
fs = ast_read( fc, status )
call testmap( fs, 8, 0.0001D0, status )
if( status .eq. sai__ok ) then
write(*,*) 'All AST_TRANGRID tests passed'
else
write(*,*) 'AST_TRANGRID tests failed'
end if
end
subroutine testmap( map, itest, tol, status )
implicit none
include 'SAE_PAR'
integer status, maxpix, itest, map
double precision tol
if( status .ne. sai__ok ) return
maxpix = 100
call testgridpair( map, tol, maxpix, itest*10, status )
call testgridpair( map, 0.0D0, maxpix, itest*10+2, status )
maxpix = 4
call testgridpair( map, tol, maxpix, itest*10+4, status )
call testgridpair( map, 0.0D0, maxpix, itest*10+6, status )
end
subroutine testgridpair( map, tol, maxpix, itest, status )
implicit none
include 'SAE_PAR'
include 'AST_PAR'
integer status, lbnd( 3 ), ubnd( 3 ), nin, nout, i, outdim,
: maxpix, itest, size, pos(3), j, map, lbndi(3), ubndi(3)
logical fwd
double precision tol, xl(3), xu(3), dlbndi(3), dubndi(3),
: dlbnd(3), dubnd(3)
data lbnd / -6, 0, 10 /
data ubnd / 15, 30, 40/
if( status .ne. sai__ok ) return
nin = ast_geti( map, 'nin', status )
nout = ast_geti( map, 'nout', status )
outdim = 1
do i = 1, nin
outdim = outdim*( ubnd( i ) - lbnd( i ) + 1 )
dlbnd( i ) = lbnd( i )
dubnd( i ) = ubnd( i )
end do
call testgrid( map, nin, lbnd, ubnd, tol, maxpix, .true., nout,
: outdim, itest, status )
outdim = 1
do i = 1, nout
call ast_mapbox( map, dlbnd, dubnd, .true., i, dlbndi(i),
: dubndi(i), xl, xu, status )
lbndi( i ) = dlbndi( i )
ubndi( i ) = dubndi( i )
outdim = outdim*( ubndi( i ) - lbndi( i ) + 1 )
end do
call testgrid( map, nout, lbndi, ubndi, tol, maxpix, .false., nin,
: outdim, itest + 1, status )
end
subroutine testgrid( map, nin, lbnd, ubnd, tol, maxpix, fwd, nout,
: outdim, itest, status )
implicit none
include 'SAE_PAR'
integer MAXPNT
parameter( MAXPNT = 50000 )
integer status, lbnd( 3 ), ubnd( 3 ), nin, nout, i, outdim,
: maxpix, itest, pos(3), j, map
logical fwd
double precision tol, out( MAXPNT, 3 ), in( MAXPNT, 3 )
if( status .ne. sai__ok ) return
* Check arrays are not over full
if( outdim .gt. MAXPNT ) then
status = sai__error
write(*,*) 'Array length exceeded in TESTTRANGRID:TESTGRID'
return
end if
* Create a regular grid of positions within the input space of the
* Mapping, and transform it to the output space of the Mapping.
call ast_trangrid( map, nin, lbnd, ubnd, tol, maxpix, fwd,
: nout, MAXPNT, out, status )
* Convert the transformed output positions back into the input space.
call ast_trann( map, outdim, nout, MAXPNT, out, .not. fwd, nin,
: MAXPNT, in, status )
* Check the input space positions are close to a regular grid.
if( status .eq. sai__ok ) then
do i = 1, nin
pos( i ) = lbnd( i )
end do
do j = 1, outdim
do i = 1, nin
if( pos( i ) .ne. 0 ) then
if( abs( in( j, i ) - pos( i ) ) .gt.
: 1.0E-6*abs( 0.5*( in( j, i ) + pos( i ) ) ) ) then
status = sai__error
write(*,*) 'Test ',itest,' failed at point ',j,
: ' axis ',i,': ',in( j, i ),
: ' should be ',pos(1)
return
end if
else
if( abs( in( j, i ) ) .gt. 1.0E-5 ) then
status = sai__error
write(*,*) 'Test ',itest,' failed at point ',j,
: ' axis ',i,': ',in( j, i ),
: ' should be ', pos(i)
return
end if
end if
end do
pos( 1 ) = pos( 1 ) + 1
if( pos( 1 ) .gt. ubnd( 1 ) ) then
pos( 1 ) = lbnd( 1 )
if( nin .gt. 1 ) then
pos( 2 ) = pos( 2 ) + 1
if( pos( 2 ) .gt. ubnd( 2 ) ) then
pos( 2 ) = lbnd( 2 )
if( nin .gt. 2 ) then
pos( 3 ) = pos( 3 ) + 1
end if
end if
end if
end if
end do
end if
end
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