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/*
# This file is part of the Astrometry.net suite.
# Licensed under a 3-clause BSD style license - see LICENSE
*/
/**
Reads a FITS file, tries to interpret a WCS header and writes out a TAN
interpretation of it.
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <math.h>
#include "sip.h"
#include "sip_qfits.h"
#include "fitsioutils.h"
#include "starutil.h"
#include "errors.h"
#include "log.h"
#include "ioutils.h"
static char* OPTIONS = "ho:e:t";
static void printHelp(char* progname) {
printf("%s <input-file>\n"
" [-e <extension>]\n"
" [-o <output-file>]\n"
" [-t]: force TAN (not SIP)\n"
"\n", progname);
}
int main(int argc, char *argv[]) {
char* progname = argv[0];
int argchar;
char* infn = NULL;
char* outfn = NULL;
sip_t* wcs;
int ext = 0;
anbool forcetan = FALSE;
tan_t* tan;
while ((argchar = getopt (argc, argv, OPTIONS)) != -1)
switch (argchar) {
case '?':
case 'h':
printHelp(progname);
return 0;
case 'e':
ext = atoi(optarg);
break;
case 'o':
outfn = optarg;
break;
case 't':
forcetan = TRUE;
break;
default:
return -1;
}
if (optind != (argc - 1)) {
printHelp(progname);
exit(-1);
}
infn = argv[optind];
log_init(LOG_MSG);
fits_use_error_system();
errors_log_to(stderr);
wcs = sip_read_tan_or_sip_header_file_ext(infn, ext, NULL, forcetan);
if (!wcs) {
ERROR("Failed to parse WCS header");
exit(-1);
}
tan = &(wcs->wcstan);
printf("crval1 %.12g\n", tan->crval[0]);
printf("crval2 %.12g\n", tan->crval[1]);
printf("crpix1 %g\n", tan->crpix[0]);
printf("crpix2 %g\n", tan->crpix[1]);
printf("cd11 %.12g\n", tan->cd[0][0]);
printf("cd12 %.12g\n", tan->cd[0][1]);
printf("cd21 %.12g\n", tan->cd[1][0]);
printf("cd22 %.12g\n", tan->cd[1][1]);
if (wcs->a_order) {
printf("a_order %i\n", wcs->a_order);
printf("b_order %i\n", wcs->b_order);
// FIXME -- print the coefficients!
}
if (outfn) {
FILE* fout;
anbool tostdout;
tostdout = streq(outfn, "-");
if (tostdout)
fout = stdout;
else {
fout = fopen(outfn, "wb");
if (!fout) {
SYSERROR("Failed to open output file %s", outfn);
exit(-1);
}
}
if (wcs->a_order) {
if (sip_write_to(wcs, fout)) {
ERROR("Failed to write SIP header to file \"%s\"", outfn);
exit(-1);
}
} else {
if (tan_write_to(&(wcs->wcstan), fout)) {
ERROR("Failed to write TAN header to file \"%s\"", outfn);
exit(-1);
}
}
if (!tostdout) {
if (fclose(fout)) {
SYSERROR("Failed to close output file \"%s\"", outfn);
exit(-1);
}
}
}
return 0;
}
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