/*------------------------------------------------------------------------------
Map. Implemented as interpretive read/write, to permit interactive behaviour.
Input: in_filename = name of file to read from;
"" or "-" means read from standard input.
out_filename = name of file to write to;
"" or "-" means write to standard output.
fmt = pointer to format structure.
w = array containing spherical harmonics.
lmax = maximum harmonic number.
lsmooth = smoothing harmonic number (0. = no smooth).
esmooth = smoothing exponent (2. = gaussian).
Return value: number of items written,
or -1 if error occurred.
*/
int map(char *in_filename, char *out_filename, format *fmt, int lmax, harmonic w[/*NW*/], double lsmooth, double esmooth)
{
/* precision of map values written to file */
#define PRECISION 8
#define AZEL_STR_LEN 32
inputfile file = {
'\0', /* input filename */
0x0, /* input file stream */
'\0', /* line buffer */
64, /* size of line buffer (will expand as necessary) */
0, /* line number */
0 /* maximum number of characters to read (0 = no limit) */
};
char input[] = "input", output[] = "output";
char *word, *next;
char az_str[AZEL_STR_LEN], el_str[AZEL_STR_LEN];
int ird, len, mmax, nmap, width;
double rho;
azel v;
char *out_fn;
FILE *outfile;
/* open in_filename for reading */
if (!in_filename || strcmp(in_filename, "-") == 0) {
file.file = stdin;
file.name = input;
} else {
file.file = fopen(in_filename, "r");
if (!file.file) {
fprintf(stderr, "cannot open %s for reading\n", in_filename);
return(-1);
}
file.name = in_filename;
}
file.line_number = 0;
/* open out_filename for writing */
if (!out_filename || strcmp(out_filename, "-") == 0) {
outfile = stdout;
out_fn = output;
} else {
outfile = fopen(out_filename, "w");
if (!outfile) {
fprintf(stderr, "cannot open %s for writing\n", out_filename);
return(-1);
}
out_fn = out_filename;
}
/* advise angular units */
msg("will take units of input az, el angles in %s to be ", file.name);
switch (fmt->inunit) {
#include "angunit.h"
}
msg("\n");
if (fmt->outunit != fmt->inunit) {
msg("units of output az, el angles will be ");
switch (fmt->outunit) {
#include "angunit.h"
}
msg("\n");
}
/* setting mmax = lmax ensures complete set of azimuthal harmonics */
mmax = lmax;
/* width of map value */
width = PRECISION + 6;
/* write header */
v.az = 0.;
wrangle(v.az, fmt->outunit, fmt->outprecision, AZEL_STR_LEN, az_str);
len = strlen(az_str);
if (fmt->outunit == 'h') {
sprintf(az_str, "az(hms)");
sprintf(el_str, "el(dms)");
} else {
sprintf(az_str, "az(%c)", fmt->outunit);
sprintf(el_str, "el(%c)", fmt->outunit);
}
fprintf(outfile, "%*s %*s %*s\n", len, az_str, len, el_str, width - 4, "wrho");
/* interpretive read/write loop */
nmap = 0;
while (1) {
/* read line */
ird = rdline(&file);
/* serious error */
if (ird == -1) return(-1);
/* EOF */
if (ird == 0) break;
/* read <az> */
word = file.line;
ird = rdangle(word, &next, fmt->inunit, &v.az);
/* skip header */
if (ird != 1 && nmap == 0) continue;
/* otherwise exit on unrecognized characters */
if (ird != 1) break;
/* read <el> */
word = next;
ird = rdangle(word, &next, fmt->inunit, &v.el);
/* skip header */
if (ird != 1 && nmap == 0) continue;
/* otherwise exit on unrecognized characters */
if (ird != 1) break;
/* convert az and el from input units to radians */
scale_azel(&v, fmt->inunit, 'r');
/*
The entire of map.c is an interface to the next line of code.
Bizarre, huh?
*/
/* compute the value of the window function at this point */
rho = wrho(v.az, v.el, lmax, mmax, w, lsmooth, esmooth);
/* convert az and el from radians to output units */
scale_azel(&v, 'r', fmt->outunit);
/* write result */
wrangle(v.az, fmt->outunit, fmt->outprecision, AZEL_STR_LEN, az_str);
wrangle(v.el, fmt->outunit, fmt->outprecision, AZEL_STR_LEN, el_str);
fprintf(outfile, "%s %s %- #*.*lg\n", az_str, el_str, width, PRECISION, rho);
fflush(outfile);
/* increment counter of results */
nmap++;
}
if (outfile != stdout) {
msg("map: %d values written to %s\n", nmap, out_fn);
}
return(nmap);
}
/*------------------------------------------------------------------------------
Angles within mask along circles centred at az el, radii th.
Anglar positions az, el are read from azel_in_filename,
angular radii th are read from th_in_filename,
or from azel_in_filename if th_in_filename is null,
and the results are written to out_filename.
Implemented as interpretive read/write, to permit interactive behaviour.
Input: azel_in_filename = name of file to read az, el from;
"" or "-" means read from standard input.
th_in_filename = name of file to read th from;
null means read from azel_in_filename;
"-" means read from standard input.
out_filename = name of file to write to;
"" or "-" means write to standard output.
fmt = pointer to format structure.
npoly = number of polygons in poly array.
poly = array of pointers to polygons.
Return value: number of lines written,
or -1 if error occurred.
*/
int drangle(char *azel_in_filename, char *th_in_filename, char *out_filename, format *fmt, int npoly, polygon *poly[/*npoly*/])
{
#define AZEL_STR_LEN 32
char input[] = "input", output[] = "output";
/* maximum number of angular angular radii: will expand as necessary */
static int nthmax = 0;
static int ndrmax = 0;
static long double *th = 0x0, *cm = 0x0, *drsum = 0x0;
static long double *dr = 0x0;
#ifdef TIME
clock_t time;
#endif
char inunit, outunit;
char *word, *next;
char az_str[AZEL_STR_LEN], el_str[AZEL_STR_LEN], th_str[AZEL_STR_LEN], dr_str[AZEL_STR_LEN];
int ier, ird, ith, len, lenth, np, nt, nth;
long double rp[3], s, t;
azel v;
char *out_fn;
FILE *outfile;
inunit = (fmt->inunit == 'h')? 'd' : fmt->inunit;
/* read angular radii from th_in_filename */
if (th_in_filename) {
/* open th_in_filename for reading */
if (strcmp(th_in_filename, "-") == 0) {
file.file = stdin;
file.name = input;
} else {
file.file = fopen(th_in_filename, "r");
if (!file.file) {
fprintf(stderr, "cannot open %s for reading\n", th_in_filename);
return(-1);
}
file.name = th_in_filename;
}
file.line_number = 0;
msg("will take units of input th angles in %s to be ", file.name);
switch (inunit) {
#include "angunit.h"
}
msg("\n");
/* read angular radii from th_in_filename */
nth = 0;
while (1) {
/* read line */
ird = rdline(&file);
/* serious error */
if (ird == -1) return(-1);
/* EOF */
if (ird == 0) break;
/* read angular radius from line */
ird = rdangle(file.line, &next, inunit, &t);
/* error */
if (ird < 1) {
/* retry if nothing read, otherwise break */
if (nth > 0) break;
/* ok */
} else if (ird == 1) {
if (nth >= nthmax) {
if (nthmax == 0) {
nthmax = 64;
} else {
nthmax *= 2;
}
/* (re)allocate memory for th array */
th = (long double *) realloc(th, sizeof(long double) * nthmax);
if (!th) {
fprintf(stderr, "drangle: failed to allocate memory for %d long doubles\n", nthmax);
return(-1);
}
}
/* copy angular radius into th array */
th[nth] = t;
nth++;
}
}
if (file.file != stdin) {
/* close th_in_filename */
fclose(file.file);
/* advise */
msg("%d angular radii read from %s\n", nth, file.name);
}
if (nth == 0) return(nth);
/* (re)allocate memory for th array */
th = (long double *) realloc(th, sizeof(long double) * nth);
if (!th) {
fprintf(stderr, "drangle: failed to allocate memory for %d long doubles\n", nth);
return(-1);
}
/* (re)allocate memory for cm array */
cm = (long double *) realloc(cm, sizeof(long double) * nth);
if (!cm) {
fprintf(stderr, "drangle: failed to allocate memory for %d long doubles\n", nth);
return(-1);
}
/* (re)allocate memory for drsum array */
drsum = (long double *) realloc(drsum, sizeof(long double) * nth);
if (!drsum) {
fprintf(stderr, "drangle: failed to allocate memory for %d long doubles\n", nth);
return(-1);
}
nthmax = nth;
}
/* open azel_in_filename for reading */
if (!azel_in_filename || strcmp(azel_in_filename, "-") == 0) {
file.file = stdin;
file.name = input;
} else {
file.file = fopen(azel_in_filename, "r");
if (!file.file) {
fprintf(stderr, "cannot open %s for reading\n", azel_in_filename);
return(-1);
}
file.name = azel_in_filename;
}
file.line_number = 0;
/* open out_filename for writing */
if (!out_filename || strcmp(out_filename, "-") == 0) {
outfile = stdout;
out_fn = output;
} else {
outfile = fopen(out_filename, "w");
if (!outfile) {
fprintf(stderr, "cannot open %s for writing\n", out_filename);
return(-1);
}
out_fn = out_filename;
}
/* advise input angular units */
if (th_in_filename) {
msg("will take units of input az, el angles in %s to be ", file.name);
} else {
msg("will take units of input az, el, and th angles in %s to be ", file.name);
}
switch (fmt->inunit) {
#include "angunit.h"
}
if (!th_in_filename && fmt->inunit == 'h') {
msg(", th in deg");
}
msg("\n");
/* advise output angular unit */
outunit = (fmt->outunit == 'h')? 'd' : fmt->outunit;
msg("units of output DR angles will be ");
switch (outunit) {
#include "angunit.h"
}
msg("\n");
#ifdef TIME
printf("timing ... ");
fflush(stdout);
time = clock();
#endif
/* length of az, el and th, dr strings to be written to output */
t = 0.;
wrangle(t, fmt->inunit, fmt->outprecision, AZEL_STR_LEN, az_str);
len = strlen(az_str);
t = 0.;
wrangle(t, inunit, fmt->outprecision, AZEL_STR_LEN, th_str);
lenth = strlen(th_str);
/* write header */
if (!summary) {
if (fmt->inunit == 'h') {
sprintf(az_str, "az(hms)");
sprintf(el_str, "el(dms)");
sprintf(th_str, "th(d):");
} else {
sprintf(az_str, "az(%c)", fmt->inunit);
sprintf(el_str, "el(%c)", fmt->inunit);
sprintf(th_str, "th(%c):", fmt->inunit);
}
if (th_in_filename) {
fprintf(outfile, "%*s %*s %*s\n", len, " ", len, " ", lenth, th_str);
}
fprintf(outfile, "%*s %*s", len, az_str, len, el_str);
if (th_in_filename) {
for (ith = 0; ith < nth; ith++) {
wrangle(th[ith], inunit, fmt->outprecision, AZEL_STR_LEN, th_str);
fprintf(outfile, " %s", th_str);
}
fprintf(outfile, "\n");
} else {
fprintf(outfile, " %*s\n", lenth, th_str);
}
}
/* initialize th and drsum */
if (th_in_filename) {
/* convert th from input units to radians */
for (ith = 0; ith < nth; ith++) {
scale(&th[ith], inunit, 'r');
}
/* initialize sum of dr to zero */
for (ith = 0; ith < nth; ith++) {
drsum[ith] = 0.;
}
}
/* interpretive read/write loop */
np = 0;
nt = 0;
while (1) {
/* read line */
ird = rdline(&file);
/* serious error */
if (ird == -1) return(-1);
/* EOF */
if (ird == 0) break;
/* read <az> */
word = file.line;
ird = rdangle(word, &next, fmt->inunit, &v.az);
/* skip header */
if (ird != 1 && np == 0) continue;
/* otherwise exit on unrecognized characters */
if (ird != 1) break;
/* read <el> */
word = next;
ird = rdangle(word, &next, fmt->inunit, &v.el);
/* skip header */
if (ird != 1 && np == 0) continue;
/* otherwise exit on unrecognized characters */
if (ird != 1) break;
/* convert az and el from input units to radians */
scale_azel(&v, fmt->inunit, 'r');
/* read th */
if (!th_in_filename) {
nth = 0;
while (1) {
word = next;
ird = rdangle(word, &next, inunit, &t);
/* done */
if (ird < 1) break;
/* ok */
if (nth >= nthmax) {
if (nthmax == 0) {
nthmax = 64;
} else {
nthmax *= 2;
}
th = (long double *) realloc(th, sizeof(long double) * nthmax);
if (!th) {
fprintf(stderr, "drangle: failed to allocate memory for %d long doubles\n", nthmax);
return(-1);
}
/* (re)allocate memory for cm array */
cm = (long double *) realloc(cm, sizeof(long double) * nthmax);
if (!cm) {
fprintf(stderr, "drangle: failed to allocate memory for %d long doubles\n", nthmax);
return(-1);
}
}
th[nth] = t;
/* increment count of angular radii */
nth++;
}
/* convert th from input units to radians */
for (ith = 0; ith < nth; ith++) {
scale(&th[nth], inunit, 'r');
}
}
/* allocate memory for dr */
if (nth > ndrmax) {
ndrmax = nth;
dr = (long double *) realloc(dr, sizeof(long double) * ndrmax);
if (!dr) {
fprintf(stderr, "drangle: failed to allocate memory for %d long doubles\n", ndrmax);
return(-1);
}
}
/* unit vector corresponding to angular position az, el */
azel_to_rp(&v, rp);
/* limiting cm = 1-cosl(th) values to each polygon */
ier = cmlim_polys(npoly, poly, mtol, rp);
if (ier == -1) return(-1);
/* cm = 1 - cosl(th) */
for (ith = 0; ith < nth; ith++) {
s = sinl(th[ith] / 2.);
cm[ith] = 2. * s * s;
}
/* angles about rp direction at radii th */
ier = drangle_polys(npoly, poly, mtol, rp, nth, cm, dr);
if (ier == -1) return(-1);
/* sum of dr at radii th */
if (th_in_filename) {
for (ith = 0; ith < nth; ith++) {
drsum[ith] += dr[ith];
}
}
/* convert az and el from radians to original input units */
scale_azel(&v, 'r', fmt->inunit);
/* write result */
if (!summary) {
wrangle(v.az, fmt->inunit, fmt->outprecision, AZEL_STR_LEN, az_str);
wrangle(v.el, fmt->inunit, fmt->outprecision, AZEL_STR_LEN, el_str);
fprintf(outfile, "%s %s", az_str, el_str);
for (ith = 0; ith < nth; ith++) {
scale(&dr[ith], 'r', outunit);
wrangle(dr[ith], outunit, fmt->outprecision, AZEL_STR_LEN, dr_str);
fprintf(outfile, " %s", dr_str);
}
fprintf(outfile, "\n");
fflush(outfile);
}
/* increment counters of results */
np++;
nt += nth;
/* warn about a potentially huge output file */
if (np == 100 && !summary && th_in_filename && outfile != stdout) {
msg("hmm, looks like %s could grow pretty large ...\n", out_fn);
msg("try using the -h switch if you only want a summary in the output file\n");
}
}
/* write sum of dr */
if (summary) {
sprintf(th_str, "th(%c)", inunit);
sprintf(dr_str, "DR(%c)", outunit);
fprintf(outfile, "%*s %*s\n", lenth, th_str, lenth, dr_str);
for (ith = 0; ith < nth; ith++) {
scale(&th[ith], 'r', inunit);
wrangle(th[ith], inunit, fmt->outprecision, AZEL_STR_LEN, th_str);
scale(&drsum[ith], 'r', outunit);
wrangle(drsum[ith] / (long double)np, outunit, fmt->outprecision, AZEL_STR_LEN, dr_str);
fprintf(outfile, "%s %s\n", th_str, dr_str);
}
fflush(outfile);
} else if (th_in_filename) {
fprintf(outfile, "%*s", 2 * len + 1, "Average:");
for (ith = 0; ith < nth; ith++) {
scale(&drsum[ith], 'r', outunit);
wrangle(drsum[ith] / (long double)np, outunit, fmt->outprecision, AZEL_STR_LEN, dr_str);
fprintf(outfile, " %s", dr_str);
}
fprintf(outfile, "\n");
fflush(outfile);
}
/* close azel_in_filename */
if (file.file != stdin) {
fclose(file.file);
}
#ifdef TIME
time = clock() - time;
printf("done in %Lg sec\n", (float)time / (float)CLOCKS_PER_SEC);
#endif
/* advise */
if (outfile != stdout) {
fclose(outfile);
if (summary) {
msg("drangle: header + %d lines written to %s\n", nth, out_fn);
} else {
if (th_in_filename) {
msg("drangle: %d x %d = ", nth, np);
} else {
msg("drangle: total of ");
}
msg("%d angles at %d positions written to %s\n", nt, np, out_fn);
}
}
return(nt);
}
/*------------------------------------------------------------------------------
Id numbers of polygons containing az, el positions.
The az, el positions are read from in_filename,
and the results are written to out_filename.
Implemented as interpretive read/write, to permit interactive behaviour.
Input: in_filename = name of file to read from;
"" or "-" means read from standard input.
out_filename = name of file to write to;
"" or "-" means write to standard output.
fmt = pointer to format structure.
poly = array of pointers to polygons.
npoly = number of polygons in poly array.
Return value: number of lines written,
or -1 if error occurred.
*/
int poly_ids(char *in_filename, char *out_filename, format *fmt, int npoly, polygon *poly[/*npoly*/])
{
#define AZEL_STR_LEN 32
char input[] = "input", output[] = "output";
char *word, *next;
char az_str[AZEL_STR_LEN], el_str[AZEL_STR_LEN];
int i, idwidth, ird, len, nid, nids, nid0, nid2, np;
long long idmin, idmax;
long long *id;
long double *weight;
azel v;
char *out_fn;
FILE *outfile;
int *start;
int *total;
int *parent_pixels;
int p, res, max_pixel, ier, sorted;
ier=-1;
sorted=0;
while(ier!=0){
max_pixel= poly[npoly-1]->pixel;
res_max=get_res(max_pixel, scheme);
max_pixel=pixel_start(res_max+1,scheme);
/* allocate memory for pixel info arrays start and total */
msg("res_max=%d, max_pixel=%d\n",res_max,max_pixel);
start = (int *) malloc(sizeof(int) * max_pixel);
if (!start) {
fprintf(stderr, "polyid: failed to allocate memory for %d integers\n", max_pixel);
return(-1);
}
total = (int *) malloc(sizeof(int) * max_pixel);
if (!total) {
fprintf(stderr, "polyid: failed to allocate memory for %d integers\n", max_pixel);
return(-1);
}
parent_pixels = (int *) malloc(sizeof(int) * (res_max+1));
if (!parent_pixels) {
fprintf(stderr, "polyid: failed to allocate memory for %d integers\n", res_max+1);
return(-1);
}
/* build lists of starting indices of each pixel and total number of polygons in each pixel*/
ier=pixel_list(npoly, poly, max_pixel, start, total);
if (ier == -1) {
// if pixel_list returns an error, try sorting the polygons and trying again
if(!sorted){
msg("sorting polygons...\n");
poly_sort(npoly,poly,'p');
sorted=1;
}
else{
fprintf(stderr, "poly_ids: error building pixel index lists\n");
return(-1);
}
}
}
/* open in_filename for reading */
if (!in_filename || strcmp(in_filename, "-") == 0) {
file.file = stdin;
file.name = input;
} else {
file.file = fopen(in_filename, "r");
if (!file.file) {
fprintf(stderr, "cannot open %s for reading\n", in_filename);
return(-1);
}
file.name = in_filename;
}
file.line_number = 0;
/* open out_filename for writing */
if (!out_filename || strcmp(out_filename, "-") == 0) {
outfile = stdout;
out_fn = output;
} else {
outfile = fopen(out_filename, "w");
if (!outfile) {
fprintf(stderr, "cannot open %s for writing\n", out_filename);
return(-1);
}
out_fn = out_filename;
}
/* advise angular units */
msg("will take units of input az, el angles in %s to be ", file.name);
switch (fmt->inunit) {
#include "angunit.h"
}
msg("\n");
if (fmt->outunit != fmt->inunit) {
msg("units of output az, el angles will be ");
switch (fmt->outunit) {
#include "angunit.h"
}
msg("\n");
}
/* largest width of polygon id number */
idmin = 0;
idmax = 0;
for (i = 0; i < npoly; i++) {
if (!poly[i]) continue;
if (poly[i]->id < idmin) idmin = poly[i]->id;
if (poly[i]->id > idmax) idmax = poly[i]->id;
}
idmin = ((idmin < 0)? floorl(log10l((long double)-idmin)) + 2 : 1);
idmax = ((idmax > 0)? floorl(log10l((long double)idmax)) + 1 : 1);
idwidth = ((idmin > idmax)? idmin : idmax);
/* write header */
v.az = 0.;
wrangle(v.az, fmt->outunit, fmt->outprecision, AZEL_STR_LEN, az_str);
len = strlen(az_str);
if (fmt->outunit == 'h') {
sprintf(az_str, "az(hms)");
sprintf(el_str, "el(dms)");
} else {
sprintf(az_str, "az(%c)", fmt->outunit);
sprintf(el_str, "el(%c)", fmt->outunit);
}
fprintf(outfile, "%*s %*s", len, az_str, len, el_str);
if (npoly > 0){
if(polyid_weight==1){
fprintf(outfile, " polygon_weights");
}
else{
fprintf(outfile, " polygon_ids");
}
}
fprintf(outfile, "\n");
/* interpretive read/write loop */
np = 0;
nid = 0;
nids = 0;
nid0 = 0;
nid2 = 0;
while (1) {
/* read line */
ird = rdline(&file);
/* serious error */
if (ird == -1) return(-1);
/* EOF */
if (ird == 0) break;
/* read <az> */
word = file.line;
ird = rdangle(word, &next, fmt->inunit, &v.az);
/* skip header */
if (ird != 1 && np == 0) continue;
/* otherwise exit on unrecognized characters */
if (ird != 1) break;
/* read <el> */
word = next;
ird = rdangle(word, &next, fmt->inunit, &v.el);
/* skip header */
if (ird != 1 && np == 0) continue;
/* otherwise exit on unrecognized characters */
if (ird != 1) break;
/* convert az and el from input units to radians */
scale_azel(&v, fmt->inunit, 'r');
//find out what pixel the az el point is in at the maximum resolution
p=which_pixel(v.az, v.el, res_max, scheme);
//get the list of all the possible parent pixels
get_parent_pixels(p, parent_pixels, scheme);
nid=0;
for(res=res_max;res>=0;res--){
p=parent_pixels[res];
//if this pixel isn't in the polygon list, go to next parent pixel
if(total[p]==0) continue;
// id numbers of the polygons containing position az, el
nid = poly_id(total[p], &poly[start[p]], v.az, v.el, &id, &weight);
}
/* convert az and el from radians to output units */
scale_azel(&v, 'r', fmt->outunit);
/* write result */
wrangle(v.az, fmt->outunit, fmt->outprecision, AZEL_STR_LEN, az_str);
wrangle(v.el, fmt->outunit, fmt->outprecision, AZEL_STR_LEN, el_str);
fprintf(outfile, "%s %s", az_str, el_str);
for (i = 0; i < nid; i++) {
if(polyid_weight==1){
fprintf(outfile, " %.18Lg", weight[i]);
} else{
fprintf(outfile, " %*lld", idwidth, id[i]);
}
}
fprintf(outfile, "\n");
fflush(outfile);
/* increment counters of results */
np++;
nids += nid;
if (nid == 0) {
nid0++;
} else if (nid >= 2) {
nid2++;
}
}
/* advise */
if (nid0 > 0) msg("%d points were not inside any polygon\n", nid0);
if (nid2 > 0) msg("%d points were inside >= 2 polygons\n", nid2);
if (outfile != stdout) {
if(polyid_weight==1){
msg("polyid: %d weights at %d positions written to %s\n", nids, np, out_fn);
} else {
msg("polyid: %d id numbers at %d positions written to %s\n", nids, np, out_fn);
}
}
free(start);
free(total);
free(parent_pixels);
return(np);
}
/*------------------------------------------------------------------------------
Rotate az, el positions from one frame to another.
The az, el positions are read from in_filename,
and rotated az, el positions are written to out_filename.
Implemented as interpretive read/write, to permit interactive behaviour.
Input: in_filename = name of file to read from;
"" or "-" means read from standard input.
out_filename = name of file to write to;
"" or "-" means write to standard output.
fmt = pointer to format structure.
Return value: number of lines written,
or -1 if error occurred.
*/
int rotate(char *in_filename, char *out_filename, format *fmt)
{
#ifndef BUFSIZE
# define BUFSIZE 64
#endif
#define AZEL_STR_LEN 32
static inputfile file = {
'\0', /* input filename */
0x0, /* input file stream */
'\0', /* line buffer */
BUFSIZE, /* size of line buffer (will expand as necessary) */
0, /* line number */
0 /* maximum number of characters to read (0 = no limit) */
};
char input[] = "input", output[] = "output";
char *word, *next;
char az_str[AZEL_STR_LEN], el_str[AZEL_STR_LEN];
int ird, len, np;
long double circle;
azel vi, vf;
char *out_fn;
FILE *outfile;
/* open in_filename for reading */
if (!in_filename || strcmp(in_filename, "-") == 0) {
file.file = stdin;
file.name = input;
} else {
file.file = fopen(in_filename, "r");
if (!file.file) {
fprintf(stderr, "cannot open %s for reading\n", in_filename);
return(-1);
}
file.name = in_filename;
}
file.line_number = 0;
/* open out_filename for writing */
if (!out_filename || strcmp(out_filename, "-") == 0) {
outfile = stdout;
out_fn = output;
} else {
outfile = fopen(out_filename, "w");
if (!outfile) {
fprintf(stderr, "cannot open %s for writing\n", out_filename);
return(-1);
}
out_fn = out_filename;
}
/* advise custom transformation */
if (fmt->outframe == -1) {
/* multiple transformation */
if (strchr(fopt, ':')) {
msg(" -f%s is equivalent to\n", fopt);
msg(" -f%.16Lg,%.16Lg,%.16Lg%c\n",
places(fmt->azn, 14), places(fmt->eln, 14), places(fmt->azp, 14), fmt->trunit);
/* single transformation */
} else {
msg("rotate -f%.16Lg,%.16Lg,%.16Lg%c\n",
fmt->azn, fmt->eln, fmt->azp, fmt->trunit);
}
/* advise standard transformation */
} else if (fmt->inframe != fmt->outframe) {
msg("rotate from %s to %s\n",
frames[fmt->inframe], frames[fmt->outframe]);
msg(" -f%s,%s is equivalent to\n",
frames[fmt->inframe], frames[fmt->outframe]);
msg(" -f%.16Lg,%.16Lg,%.16Lg%c\n",
places(fmt->azn, 14), places(fmt->eln, 14), places(fmt->azp, 14), fmt->trunit);
}
/* angular units */
msg("will take units of input az, el angles in %s to be ", file.name);
switch (fmt->inunit) {
#include "angunit.h"
}
msg("\n");
if (fmt->outunit != fmt->inunit) {
msg("units of output az, el angles will be ");
switch (fmt->outunit) {
#include "angunit.h"
}
msg("\n");
}
/* write header */
vf.az = 0.;
wrangle(vf.az, fmt->outunit, fmt->outprecision, AZEL_STR_LEN, az_str);
len = strlen(az_str);
if (fmt->outunit == 'h') {
sprintf(az_str, "az(hms)");
sprintf(el_str, "el(dms)");
} else {
sprintf(az_str, "az(%c)", fmt->outunit);
sprintf(el_str, "el(%c)", fmt->outunit);
}
fprintf(outfile, "%*s %*s\n", len, az_str, len, el_str);
/* interpretive read/write loop */
np = 0;
while (1) {
/* read line */
ird = rdline(&file);
/* serious error */
if (ird == -1) return(-1);
/* EOF */
if (ird == 0) break;
/* read <az> */
word = file.line;
ird = rdangle(word, &next, fmt->inunit, &vi.az);
/* skip header */
if (ird != 1 && np == 0) continue;
/* otherwise exit on unrecognized characters */
if (ird != 1) break;
/* read <el> */
word = next;
ird = rdangle(word, &next, fmt->inunit, &vi.el);
/* skip header */
if (ird != 1 && np == 0) continue;
/* otherwise exit on unrecognized characters */
if (ird != 1) break;
/* identity: treat specially to avoid loss of precision in scaling */
if (fmt->inframe == fmt->outframe) {
/* output angles = input angles */
vf.az = vi.az;
vf.el = vi.el;
circle = 360.;
scale(&circle, 'd', fmt->inunit);
/* phase az */
switch (fmt->outphase) {
case '+': if (vf.az < 0.) vf.az += circle; break;
case '-': if (vf.az > circle / 2.) vf.az -= circle; break;
}
/* convert az and el from input to output units */
scale_azel(&vf, fmt->inunit, fmt->outunit);
/* normal rotation */
} else {
/* convert az and el from input units to degrees */
scale_azel(&vi, fmt->inunit, 'd');
/* rotate az and el */
rotate_azel(fmt, &vi, &vf);
/* phase az */
switch (fmt->outphase) {
case '+': if (vf.az < 0.) vf.az += 360.; break;
case '-': if (vf.az > 180.) vf.az -= 360.; break;
}
/* convert az and el from degrees to output units */
scale_azel(&vf, 'd', fmt->outunit);
}
/* write result */
wrangle(vf.az, fmt->outunit, fmt->outprecision, AZEL_STR_LEN, az_str);
wrangle(vf.el, fmt->outunit, fmt->outprecision, AZEL_STR_LEN, el_str);
fprintf(outfile, "%s %s\n", az_str, el_str);
fflush(outfile);
/* increment counters of results */
np++;
}
if (outfile != stdout) {
msg("rotate: %d positions written to %s\n", np, out_fn);
}
return(np);
}
/*------------------------------------------------------------------------------
Counts of pairs in bins bounded by radii th, centred at az el.
Anglar positions az, el are read from azel_in_filename,
angular radii th are read from th_in_filename,
or from azel_in_filename if th_in_filename is null,
and the results are written to out_filename.
Implemented as interpretive read/write, to permit interactive behaviour.
Input: azel_in_filename = name of file to read az, el from;
"" or "-" means read from standard input.
th_in_filename = name of file to read th from;
"" or "-" means read from standard input.
out_filename = name of file to write to;
"" or "-" means write to standard output.
fmt = pointer to format structure.
npoly = number of polygons in poly array.
poly = array of pointers to polygons.
Return value: number of distinct pairs counted,
or -1 if error occurred.
*/
long ddcount(char *azel_in_filename, char *th_in_filename, char *out_filename, format *fmt, int npoly, polygon *poly[/*npoly*/])
{
#define AZEL_STR_LEN 32
char input[] = "input", output[] = "output";
/* maximum number of angular angular radii: will expand as necessary */
static int nthmax = 0;
/* maximum number of az-el points: will expand as necessary */
static int nazelmax = 0;
static int *dd = 0x0, *id = 0x0, *iord = 0x0;
static long double *cm = 0x0, *th = 0x0;
static azel *v = 0x0;
static vec *rp = 0x0;
#ifdef TIME
clock_t time;
#endif
char inunit;
char *word, *next;
char th_str[AZEL_STR_LEN];
int i, iazel, idi, ird, ith, j, jazel, manyid, nazel, nid, noid, nth;
int *id_p;
long np;
long double az, cmm, el, s, t;
char *out_fn;
FILE *outfile;
/* open th_in_filename for reading */
if (strcmp(th_in_filename, "-") == 0) {
file.file = stdin;
file.name = input;
} else {
file.file = fopen(th_in_filename, "r");
if (!file.file) {
fprintf(stderr, "cannot open %s for reading\n", th_in_filename);
return(-1);
}
file.name = th_in_filename;
}
file.line_number = 0;
inunit = (fmt->inunit == 'h')? 'd' : fmt->inunit;
msg("will take units of input th angles in %s to be ", file.name);
switch (inunit) {
#include "angunit.h"
}
msg("\n");
/* read angular radii th from th_in_filename */
nth = 0;
while (1) {
/* read line */
ird = rdline(&file);
/* serious error */
if (ird == -1) return(-1);
/* EOF */
if (ird == 0) break;
/* read angular radius from line */
ird = rdangle(file.line, &next, inunit, &t);
/* error */
if (ird < 1) {
/* retry if nothing read, otherwise break */
if (nth > 0) break;
/* ok */
} else if (ird == 1) {
if (nth >= nthmax) {
if (nthmax == 0) {
nthmax = 64;
} else {
nthmax *= 2;
}
/* (re)allocate memory for th array */
th = (long double *) realloc(th, sizeof(long double) * nthmax);
if (!th) {
fprintf(stderr, "ddcount: failed to allocate memory for %d long doubles\n", nthmax);
return(-1);
}
}
/* store th */
th[nth] = t;
nth++;
}
}
if (file.file != stdin) {
/* close th_in_filename */
fclose(file.file);
/* advise */
msg("%d angular radii read from %s\n", nth, file.name);
}
if (nth == 0) return(nth);
/* open azel_in_filename for reading */
if (!azel_in_filename || strcmp(azel_in_filename, "-") == 0) {
file.file = stdin;
file.name = input;
} else {
file.file = fopen(azel_in_filename, "r");
if (!file.file) {
fprintf(stderr, "cannot open %s for reading\n", azel_in_filename);
return(-1);
}
file.name = azel_in_filename;
}
file.line_number = 0;
/* advise input angular units */
msg("will take units of input az, el angles in %s to be ", file.name);
switch (fmt->inunit) {
#include "angunit.h"
}
msg("\n");
/* read angular positions az, el from azel_in_filename */
nazel = 0;
while (1) {
/* read line */
ird = rdline(&file);
/* serious error */
if (ird == -1) return(-1);
/* EOF */
if (ird == 0) break;
/* read <az> */
word = file.line;
ird = rdangle(word, &next, fmt->inunit, &az);
/* skip header */
if (ird != 1 && nazel == 0) continue;
/* otherwise exit on unrecognized characters */
if (ird != 1) break;
/* read <el> */
word = next;
ird = rdangle(word, &next, fmt->inunit, &el);
/* skip header */
if (ird != 1 && nazel == 0) continue;
/* otherwise exit on unrecognized characters */
if (ird != 1) break;
/* (re)allocate memory for array of az-el points */
if (nazel >= nazelmax) {
if (nazelmax == 0) {
nazelmax = 64;
} else {
nazelmax *= 2;
}
v = (azel *) realloc(v, sizeof(azel) * nazelmax);
if (!v) {
fprintf(stderr, "ddcount: failed to allocate memory for %d az-el points\n", nazelmax);
return(-1);
}
}
/* record az-el */
v[nazel].az = az;
v[nazel].el = el;
/* increment number of az-el points */
nazel++;
}
if (file.file != stdin) {
/* close azel_in_filename */
fclose(file.file);
/* advise */
msg("%d angular positions az, el read from %s\n", nazel, file.name);
}
if (nazel == 0) return(nazel);
/* open out_filename for writing */
if (!out_filename || strcmp(out_filename, "-") == 0) {
outfile = stdout;
out_fn = output;
} else {
outfile = fopen(out_filename, "w");
if (!outfile) {
fprintf(stderr, "cannot open %s for writing\n", out_filename);
return(-1);
}
out_fn = out_filename;
}
/* (re)allocate memory */
cm = (long double *) realloc(dd, sizeof(long double) * nth);
if (!cm) {
fprintf(stderr, "ddcount: failed to allocate memory for %d long doubles\n", nth);
return(-1);
}
dd = (int *) realloc(dd, sizeof(int) * nth);
if (!dd) {
fprintf(stderr, "ddcount: failed to allocate memory for %d ints\n", nth);
return(-1);
}
id = (int *) realloc(id, sizeof(int) * nazel);
if (!id) {
fprintf(stderr, "ddcount: failed to allocate memory for %d ints\n", nazel);
return(-1);
}
rp = (vec *) realloc(rp, sizeof(vec) * nazel);
if (!rp) {
fprintf(stderr, "ddcount: failed to allocate memory for %d unit vectors\n", nazel);
return(-1);
}
iord = (int *) realloc(iord, sizeof(int) * nazel);
if (!iord) {
fprintf(stderr, "ddcount: failed to allocate memory for %d ints\n", nazel);
return(-1);
}
/* store 1 - cosl(th) in cm array */
for (ith = 0; ith < nth; ith++) {
t = th[ith];
scale(&t, inunit, 'r');
s = sinl(t / 2.);
cm[ith] = 2. * s * s;
}
/* convert az-el angles to radians */
for (iazel = 0; iazel < nazel; iazel++) {
scale_azel(&v[iazel], fmt->inunit, 'r');
}
/* convert az-el points to unit vectors */
for (iazel = 0; iazel < nazel; iazel++) {
azel_to_rp(&v[iazel], rp[iazel]);
}
/* polygon id number(s) of az-el points */
msg("figuring polygon id number(s) of each az-el point ...");
noid = 0;
manyid = 0;
for (iazel = 0; iazel < nazel; iazel++) {
nid = poly_id(npoly, poly, v[iazel].az, v[iazel].el, &id_p);
if (nid == 0) {
noid++;
} else if (nid > 1) {
manyid++;
}
/* store first polygon id of point */
if (nid == 0) {
id[iazel] = -1;
} else {
id[iazel] = id_p[0];
}
}
msg(" done\n");
if (noid > 0) {
msg("%d az-el points lie outside the angular mask: discard them\n", noid);
}
if (manyid > 0) {
msg("%d az-el points lie inside more than one polygon: use only first polygon\n", manyid);
}
/* order az-el points in increasing order of polygon id */
finibot(id, nazel, iord, nazel);
/* write header */
fprintf(outfile, "th(%c):", inunit);
for (ith = 0; ith < nth; ith++) {
wrangle(th[ith], inunit, fmt->outprecision, AZEL_STR_LEN, th_str);
fprintf(outfile, "\t%s", th_str);
}
fprintf(outfile, "\n");
msg("counting pairs ...");
#ifdef TIME
printf(" timing ... ");
fflush(stdout);
time = clock();
#endif
/* loop over az-el points */
idi = -1;
nid = 0;
np = 0;
for (iazel = 0; iazel < nazel; iazel++) {
i = iord[iazel];
/* skip points outside mask */
if (id[i] == -1) continue;
/* new polygon */
if (id[i] != idi) {
idi = id[i];
/* reset pair counts to zero */
for (ith = 0; ith < nth; ith++) dd[ith] = 0;
}
//printf(" %d", idi);
/* az-el neighbours within same polygon */
for (jazel = iazel + 1; jazel < nazel; jazel++) {
j = iord[jazel];
/* exit at new polygon */
if (id[j] != idi) break;
/* 1 - cosl(th_ij) */
cmm = cmij(rp[i], rp[j]);
/* ith such that cm[ith-1] <= cmm < cm[ith] */
ith = search(nth, cm, cmm);
/* increment count in this bin */
if (ith < nth) dd[ith]++;
/* increment total pair count */
np++;
}
/* write counts for this polygon */
if (iazel + 1 == nazel || id[iord[iazel + 1]] != idi) {
fprintf(outfile, "%d", idi);
for (ith = 0; ith < nth; ith++) {
fprintf(outfile, "\t%d", dd[ith]);
}
fprintf(outfile, "\n");
fflush(outfile);
nid++;
//printf("\n");
}
}
#ifdef TIME
time = clock() - time;
printf("done in %Lg sec\n", (float)time / (float)CLOCKS_PER_SEC);
#else
msg("\n");
#endif
/* advise */
if (outfile != stdout) {
fclose(outfile);
msg("%d distinct pairs in %d th-bins x %d polygons written to %s\n", np, nth, nid, out_fn);
}
return(np);
}