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/* gcc -g -o qcon qcon.c -I/soft/saord/include -L/soft/saord/lib -lfuntools -lsocket -lnsl -ldl -lm */
#include <funtools.h>
#include <stdlib.h>
extern char *optarg;
extern int optind;
int main(int argc, char **argv)
{
int c;
int args;
int offscl;
int dim1, dim2;
int ix, iy;
int offset;
int debug=0;
int dowcs=1;
int idx=0;
char tbuf[SZ_LINE];
double dval1, dval2;
double dx, dy;
double *dbuf;
struct WorldCoor *wcs;
Fun fun;
/* process switch arguments */
while( (c = getopt(argc, argv, "d")) != -1){
switch(c){
case 'd':
debug = 1;
break;
case 'i':
dowcs = 0;
break;
}
}
/* check for required arguments */
args = argc - optind;
if( args < 1 ){
fprintf(stderr, "usage: %s iname -d -i\n", argv[0]);
fprintf(stderr, "\n");
fprintf(stderr, "where:\n");
fprintf(stderr, " -d\tprint out input and output position values\n");
fprintf(stderr, " -i\tinput values are image x,y (not ra,dec in deg)\n");
fprintf(stderr, "\n");
exit(1);
}
/* exit on gio errors */
setgerror(2);
/* open the input FITS file */
if( !(fun = FunOpen(argv[optind], "r", NULL)) )
gerror(stderr, "could not FunOpen input file: %s\n", argv[optind]);
/* extract and bin the data section into a double float image buffer */
if( !(dbuf = FunImageGet(fun, NULL, "bitpix=-64")) )
gerror(stderr, "could not FunImageGet: %s\n", argv[1]);
/* get required information from funtools structure */
FunInfoGet(fun,
FUN_SECT_DIM1, &dim1,
FUN_SECT_DIM2, &dim2,
FUN_WCS, &wcs,
0);
/* for each line in the contour file ... */
while( fgets(tbuf, SZ_LINE, stdin) ){
/* ignore comments */
if( *tbuf == '#' )
continue;
/* blank lines means reset counter */
if( *tbuf == '\n' ){
fprintf(stdout, "\n");
idx = 0;
continue;
}
/* input contour values: ra, dec in degrees (or image coords if -i) */
if(sscanf(tbuf, "%lf %lf", &dval1, &dval2) != 2){
gerror(stderr, "invalid line in contour file: %s\n", tbuf);
}
/* convert input ra, dec to image x, y */
if( dowcs ){
wcs2pix(wcs, dval1, dval2, &dx, &dy, &offscl);
/* make sure we are not off scale */
if( offscl ){
fprintf(stderr, "warning: wcs position is offscale: %s\n", tbuf);
continue;
}
}
else{
dx = dval1;
dy = dval2;
}
/* convert image values to integers */
ix = (int)(dx+0.5);
iy = (int)(dy+0.5);
/* sanity checks -- must be inside the image */
if( (ix < 1) || (ix > dim1) || (iy < 1) || (iy > dim2)){
fprintf(stderr, "warning: image position off image: %s\n", tbuf);
continue;
}
/* calculate offset into dbuf */
offset = (iy-1)*dim1 + ix-1;
/* write out the index and the pixel value at the image position */
fprintf(stdout, "%d\t%f", idx, dbuf[offset]);
/* debugging info, if necessary */
if( debug ){
fprintf(stdout, "\t %f %f\t%d %d", dval1, dval2, ix, iy);
}
/* finish off line */
fprintf(stdout, "\n");
/* bump to next index */
idx++;
}
/* close output first so that flush happens automatically */
FunClose(fun);
if( dbuf ) free(dbuf);
return(0);
}
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