--- ray/src/hd/rhinfo.c	2010/09/30 14:45:10	3.12
+++ ray/src/hd/rhinfo.c	2023/12/20 23:09:34	3.16
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: rhinfo.c,v 3.12 2010/09/30 14:45:10 greg Exp $";
+static const char	RCSid[] = "$Id: rhinfo.c,v 3.16 2023/12/20 23:09:34 greg Exp $";
 #endif
 /*
  * Get general information on holodeck file
@@ -49,11 +49,10 @@ gethdinfo(		/* get information on holodeck */
 	FILE	*fp;
 	HOLO	*hdsect;
 	int	fd;
-	int32	nextloc;
-	off_t	fsiz;
+	off_t	nextloc, fsiz;
 	int	n;
 					/* open holodeck file */
-	if ((fp = fopen(fname, "r")) == NULL) {
+	if ((fp = fopen(fname, "rb")) == NULL) {
 		sprintf(errmsg, "cannot open \"%s\"", fname);
 		error(SYSTEM, errmsg);
 	}
@@ -65,8 +64,8 @@ gethdinfo(		/* get information on holodeck */
 	fd = dup(fileno(fp));			/* dup file handle */
 	nextloc = ftell(fp);			/* get stdio position */
 	fclose(fp);				/* done with stdio */
-	for (n = 0; nextloc > 0L; n++) {	/* get the section(s) */
-		lseek(fd, (off_t)nextloc, SEEK_SET);
+	for (n = 0; nextloc > 0; n++) {		/* get the section(s) */
+		lseek(fd, nextloc, SEEK_SET);
 		read(fd, (char *)&nextloc, sizeof(nextloc));
 		fprintf(fout, "Section %d:\n", n);
 		hdsect = hdinit(fd, NULL);	/* load section directory */
@@ -89,16 +88,16 @@ gethdinfo(		/* get information on holodeck */
 
 static void
 psectstats(		/* print statistical information for section */
-	register HOLO	*hp,
+	HOLO	*hp,
 	FILE	*fp
 )
 {
 	int	scount[NHBINS];
 	int	minsamp = 10000, maxsamp = 0;
 	FVECT	vt;
-	double	sqrtmaxp;
+	double	sqrtmaxp, median;
 	int	bmin, bmax, cnt;
-	register int	i;
+	int	i;
 
 	fcross(vt, hp->xv[0], hp->xv[1]);
 	fprintf(fp, "\tWorld volume:            %g\n", fabs(DOT(vt,hp->xv[2])));
@@ -120,18 +119,18 @@ psectstats(		/* print statistical information for sect
 	for (i = NHBINS; i--; )
 		scount[i] = 0;
 	for (i = nbeams(hp); i > 0; i--)
-		scount[(int)(NHBINS*sqrt((double)hp->bi[i].nrd)/sqrtmaxp)]++;
-	for (cnt = 0, i = 0; i < NHBINS && cnt<<1 < nbeams(hp); i++)
+		scount[(int)((NHBINS-FTINY)*sqrt((double)hp->bi[i].nrd)/sqrtmaxp)]++;
+	for (cnt = i = 0; i < NHBINS && cnt<<1 < nbeams(hp); i++)
 		cnt += scount[i];
+	median = (i-.5)*(i-.5)*(maxsamp+1)*(1./(NHBINS*NHBINS));
+	if (median < minsamp) median = minsamp;
 	fprintf(fp, "\tSamples per beam:        [min,med,max]= [%d,%.0f,%d]\n",
-			minsamp,
-			(i-.5)*(i-.5)*(maxsamp+1)/(NHBINS*NHBINS),
-			maxsamp);
+			minsamp, median, maxsamp);
 	fprintf(fp, "\tHistogram: [minsamp,maxsamp)= #beams\n");
 	bmax = 0;
 	for (i = 0; i < NHBINS; i++) {
 		bmin = bmax;
-		bmax = (i+1)*(i+1)*(maxsamp+1)/(NHBINS*NHBINS);
+		bmax = (i+1)*(i+1)*(maxsamp+1)*(1./(NHBINS*NHBINS));
 		fprintf(fp, "\t\t[%d,%d)= %d\n", bmin, bmax, scount[i]);
 	}
 }