task	ttt

include <math.h>
define	DIM	2

procedure ttt()

pointer mw, ct
pointer bufptr
double	r[DIM]		# crpix
double	w[DIM]		# crval
double	cd[DIM,DIM]	# CD matrix
double	pa, scale
double	x, y, ra, dec
int	ndim
bool	done
pointer mw_open(), mw_sctran()
double	clgetd()

begin
	ndim = DIM
	pa = DEGTORAD(30.d0)
	scale = 0.1d0			# 0.1 degree / pixel
	r[1] = 0.d0
	r[2] = 0.d0
	w[1] = 30.d0		# ra
	w[2] = 60.d0		# dec
	cd[1,1] = -scale * cos (pa)
	cd[2,1] = scale * sin (pa)
	cd[1,2] = scale * sin (pa)
	cd[2,2] = scale * cos (pa)

	bufptr = NULL
	mw = mw_open (bufptr, ndim)

	call mw_newsystem (mw, "world", ndim)

	call mw_swtermd (mw, r, w, cd, ndim)
	call mw_swattrs (mw, 1, "axtype", "ra")
	call mw_swattrs (mw, 1, "wtype", "tan")
	call mw_swattrs (mw, 2, "axtype", "dec")
	call mw_swattrs (mw, 2, "wtype", "tan")

	# Initialize for converting pixel coords to ra & dec.
	ct = mw_sctran (mw, "logical", "world", 3b)

	done = false
	while (!done) {
	    x = clgetd ("x")
	    if (x == 999.d0) {			# termination flag
		done = true
	    } else {
		y = clgetd ("y")
		call mw_c2trand (ct, x, y, ra, dec)
		call eprintf ("%8.4f %8.4f\n")
		    call pargd (ra)
		    call pargd (dec)
	    }
	}

	call mw_ctfree (ct)
	call mw_close (mw)
end