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/*** File libwcs/sortstar.c
*** March 14, 2000
*** By Doug Mink, dmink@cfa.harvard.edu
*** Harvard-Smithsonian Center for Astrophysics
*/
/* void FluxSortStars() Sort star list based on brightness
* int StarFluxSort() Return brightest of two stars based on flux
* void MagSortStars() Sort stars list based on magnitude
* int StarMagSort() Return brightest of two stars based on mag.
* void RASortStars() Sort stars based on right ascension
* int StarRASort() Return star with lowest right ascension
* void XSortStars() Sort stars based on X coordinate in image
* int StarXSort() Return star with lowest X coordinate
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "vimoswcs.h"
#include "vimoswcscat.h"
/* structure for star lists needed for sorting */
typedef struct {
double n; /* Identifying number */
double ra; /* Right Ascension */
double dec; /* Declination */
double pra; /* Right Ascension proper motion */
double pdec; /* Declination proper motion */
double b; /* First magnitude */
double r; /* Second magnitude */
double x; /* Image X coordinate */
double y; /* Image Y coordinate */
int c; /* Other 4-byte information */
char *obj; /* Object name */
} StarInfo;
/* StarFluxSort -- Order stars in decreasing flux called by qsort */
static int
StarFluxSort (ssp1, ssp2)
void *ssp1, *ssp2;
{
double b1 = ((StarInfo *)ssp1)->b;
double b2 = ((StarInfo *)ssp2)->b;
if (b2 > b1)
return (1);
else if (b2 < b1)
return (-1);
else
return (0);
}
/* StarMagSort -- Order stars in decreasing flux called by qsort */
static int
StarMagSort (ssp1, ssp2)
void *ssp1, *ssp2;
{
double b1 = ((StarInfo *)ssp1)->b;
double b2 = ((StarInfo *)ssp2)->b;
if (b2 < b1)
return (1);
else if (b2 > b1)
return (-1);
else
return (0);
}
/* Order stars in increasing right ascension (called by qsort) */
static int
StarRASort (ssp1, ssp2)
void *ssp1, *ssp2;
{
double ra1 = ((StarInfo *)ssp1)->ra;
double ra2 = ((StarInfo *)ssp2)->ra;
if (ra2 > ra1)
return (-1);
else if (ra2 < ra1)
return (1);
else
return (0);
}
/* StarXSort -- Order stars in decreasing X value called by qsort */
static int
StarXSort (ssp1, ssp2)
void *ssp1, *ssp2;
{
double x1 = ((StarInfo *)ssp1)->x;
double x2 = ((StarInfo *)ssp2)->x;
if (x2 < x1)
return (1);
else if (x2 > x1)
return (-1);
else
return (0);
}
/* Sort image stars by decreasing flux */
void
FluxSortStars (sx, sy, sb, sc, ns)
double *sx;
double *sy;
double *sb;
int *sc;
int ns;
{
StarInfo *stars;
/* static int StarFluxSort (); */
int i;
stars = (StarInfo *) calloc ((unsigned int)ns, sizeof(StarInfo));
for (i = 0; i < ns; i++) {
stars[i].x = sx[i];
stars[i].y = sy[i];
stars[i].b = sb[i];
stars[i].c = sc[i];
}
qsort ((char *)stars, ns, sizeof(StarInfo), StarFluxSort);
for (i = 0; i < ns; i++) {
sx[i] = stars[i].x;
sy[i] = stars[i].y;
sb[i] = stars[i].b;
sc[i] = stars[i].c;
}
free ((char *)stars);
return;
}
/* MagSortStars -- Sort image stars by increasing magnitude */
void
MagSortStars (sn, sra, sdec, spra, spdec, sx, sy, sm, sr, sc, sobj, ns)
double *sn; /* Identifying number */
double *sra; /* Right Ascension */
double *sdec; /* Declination */
double *spra; /* Right Ascension proper motion */
double *spdec; /* Declination proper motion */
double *sx; /* Image X coordinate */
double *sy; /* Image Y coordinate */
double *sm; /* First magnitude */
double *sr; /* Second magnitude */
int *sc; /* Other 4-byte information */
char **sobj; /* Object name */
int ns; /* Number of stars to sort */
{
StarInfo *stars;
int i, hasnum, hasmagr, hasobj, haspm;
/* static int StarMagSort (); */
stars = (StarInfo *) calloc ((unsigned int)ns, sizeof(StarInfo));
if (sn == NULL)
hasnum = 0;
else
hasnum = 1;
if (sr == NULL)
hasmagr = 0;
else
hasmagr = 1;
if (spra != NULL && spdec != NULL)
haspm = 1;
else
haspm = 0;
if (sobj == NULL)
hasobj = 0;
else
hasobj = 1;
for (i = 0; i < ns; i++) {
if (hasnum)
stars[i].n = sn[i];
stars[i].ra = sra[i];
stars[i].dec = sdec[i];
if (haspm) {
stars[i].pra = spra[i];
stars[i].pdec = spdec[i];
}
stars[i].x = sx[i];
stars[i].y = sy[i];
stars[i].b = sm[i];
if (hasmagr)
stars[i].r = sr[i];
stars[i].c = sc[i];
if (hasobj)
stars[i].obj = sobj[i];
}
qsort ((char *)stars, ns, sizeof(StarInfo), StarMagSort);
for (i = 0; i < ns; i++) {
if (hasnum)
sn[i] = stars[i].n;
sra[i] = stars[i].ra;
sdec[i] = stars[i].dec;
if (haspm) {
spra[i] = stars[i].pra;
spdec[i] = stars[i].pdec;
}
sx[i] = stars[i].x;
sy[i] = stars[i].y;
sm[i] = stars[i].b;
if (hasmagr)
sr[i] = stars[i].r;
sc[i] = stars[i].c;
if (hasobj)
sobj[i] = stars[i].obj;
}
free ((char *)stars);
return;
}
/* Sort image stars by increasing right ascension */
void
RASortStars (sn, sra, sdec, spra, spdec, sx, sy, sm, sm1, sc, sobj, ns)
double *sn; /* Identifying number */
double *sra; /* Right Ascension */
double *sdec; /* Declination */
double *spra; /* Right Ascension proper motion */
double *spdec; /* Declination proper motion */
double *sx; /* Image X coordinate */
double *sy; /* Image Y coordinate */
double *sm; /* First magnitude */
double *sm1; /* Second magnitude */
int *sc; /* Other 4-byte information */
char **sobj; /* Object name */
int ns; /* Number of stars to sort */
{
StarInfo *stars;
int i, hasnum, hasmag1, hasobj, haspm;
/* static int StarRASort (); */
stars = (StarInfo *) calloc ((unsigned int)ns, sizeof(StarInfo));
if (sn == NULL)
hasnum = 0;
else
hasnum = 1;
if (spra != NULL && spdec != NULL)
haspm = 1;
else
haspm = 0;
if (sm1 == NULL)
hasmag1 = 0;
else
hasmag1 = 1;
if (sobj == NULL)
hasobj = 0;
else
hasobj = 1;
for (i = 0; i < ns; i++) {
if (hasnum)
stars[i].n = sn[i];
stars[i].ra = sra[i];
stars[i].dec = sdec[i];
if (haspm) {
stars[i].pra = spra[i];
stars[i].pdec = spdec[i];
}
stars[i].x = sx[i];
stars[i].y = sy[i];
stars[i].b = sm[i];
if (hasmag1)
stars[i].r = sm1[i];
stars[i].c = sc[i];
if (hasobj)
stars[i].obj = sobj[i];
}
qsort ((char *)stars, ns, sizeof(StarInfo), StarRASort);
for (i = 0; i < ns; i++) {
if (hasnum)
sn[i] = stars[i].n;
sra[i] = stars[i].ra;
sdec[i] = stars[i].dec;
if (haspm) {
spra[i] = stars[i].pra;
spdec[i] = stars[i].pdec;
}
sx[i] = stars[i].x;
sy[i] = stars[i].y;
sm[i] = stars[i].b;
if (hasmag1)
sm1[i] = stars[i].r;
sc[i] = stars[i].c;
if (hasobj)
sobj[i] = stars[i].obj;
}
free ((char *)stars);
return;
}
/* XSortStars -- Sort image stars by increasing X value */
void
XSortStars (sn, sra, sdec, spra, spdec, sx, sy, sm, sm1, sc, sobj, ns)
double *sn; /* Identifying number */
double *sra; /* Right Ascension */
double *sdec; /* Declination */
double *spra; /* Right Ascension proper motion */
double *spdec; /* Declination proper motion */
double *sx; /* Image X coordinate */
double *sy; /* Image Y coordinate */
double *sm; /* First magnitude */
double *sm1; /* Second magnitude */
int *sc; /* Other 4-byte information */
char **sobj; /* Object name */
int ns; /* Number of stars to sort */
{
StarInfo *stars;
int i, hasnum, hasmag1, hasobj, haspm;
/* static int StarXSort (); */
stars = (StarInfo *) calloc ((unsigned int)ns, sizeof(StarInfo));
if (sn == NULL)
hasnum = 0;
else
hasnum = 1;
if (spra != NULL && spdec != NULL)
haspm = 1;
else
haspm = 0;
if (sm1 == NULL)
hasmag1 = 0;
else
hasmag1 = 1;
if (sobj == NULL)
hasobj = 0;
else
hasobj = 1;
for (i = 0; i < ns; i++) {
if (hasnum)
stars[i].n = sn[i];
stars[i].ra = sra[i];
stars[i].dec = sdec[i];
if (haspm) {
stars[i].pra = spra[i];
stars[i].pdec = spdec[i];
}
stars[i].x = sx[i];
stars[i].y = sy[i];
stars[i].b = sm[i];
if (hasmag1)
stars[i].r = sm1[i];
stars[i].c = sc[i];
if (hasobj)
stars[i].obj = sobj[i];
}
qsort ((char *)stars, ns, sizeof(StarInfo), StarXSort);
for (i = 0; i < ns; i++) {
if (hasnum)
sn[i] = stars[i].n;
sra[i] = stars[i].ra;
sdec[i] = stars[i].dec;
if (haspm) {
spra[i] = stars[i].pra;
spdec[i] = stars[i].pdec;
}
sx[i] = stars[i].x;
sy[i] = stars[i].y;
sm[i] = stars[i].b;
if (hasmag1)
sm1[i] = stars[i].r;
sc[i] = stars[i].c;
if (hasobj)
sobj[i] = stars[i].obj;
}
free ((char *)stars);
return;
}
/* Jun 13 1996 New program
* Oct 18 1996 Add sorting by X value
* Nov 13 1996 Add second magnitude
* Jan 10 1997 Fix bug in RASortStars to return correct red magnitude
*
* Mar 2 1998 Make number and second magnitude optional
* Oct 21 1998 Add RefCat() to set reference catalog code
* Oct 26 1998 Include object names in star catalog entry structure
* Oct 29 1998 Return coordinate system and title from RefCat
* Nov 20 1998 Add USNO A-2.0 catalog and return different code
* Dec 9 1998 Add Hipparcos and Tycho catalogs
*
* Jan 26 1999 Add subroutines to deal with ranges of numbers
* Feb 8 1999 Fix bug initializing ACT catalog
* Feb 11 1999 Change starcat.insys to starcat.coorsys
* May 19 1999 Move catalog subroutines to catutil()
* Aug 26 1999 Compare pointers to NULL, not 0
*
* Mar 14 2000 Add proper motions
*/
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