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root/Development/ray/src/util/rfluxmtx.c

Comparing ray/src/util/rfluxmtx.c (file contents):
Revision 2.16 by greg, Tue Aug 26 07:41:29 2014 UTC vs.
Revision 2.67 by greg, Fri Nov 14 23:51:42 2025 UTC

#	Line 18 | Line 18 | static const char RCSid[] = "$Id$";
18		#include "triangulate.h"
19		#include "platform.h"
20
21	<	#ifdef getc_unlocked            /* avoid horrendous overhead of flockfile */
22	<	#undef getc
23	<	#define getc    getc_unlocked
21	>	#ifndef MAXRCARG
22	>	#define MAXRCARG        10000
23		#endif
24
25	<	#ifdef _WIN32
26	<	#define SPECIALS        " \t\"$*?"
28	<	#define QUOTCHAR        '"'
29	<	#else
30	<	#define SPECIALS        " \t\n'\"()${}*?[];|&"
31	<	#define QUOTCHAR        '\''
32	<	#define ALTQUOT         '"'
33	<	#endif
25	>	#define         NOWARN          1
26	>	#define         VERBO           2
27
28	<	#define MAXRCARG        512
28	>	int             verbose = 0;            /* verbose/warning mode */
29
37	–	char            *progname;              /* global argv[0] */
38	–
39	–	int             verbose = 0;            /* verbose mode (< 0 no warnings) */
40	–
30		char            *rcarg[MAXRCARG+1] = {"rcontrib", "-fo+"};
31		int             nrcargs = 2;
32
#	Line 53 | Line 42 | char           *shirchiufn = "disk2square.cal";
42		char            *kfullfn = "klems_full.cal";
43		char            *khalffn = "klems_half.cal";
44		char            *kquarterfn = "klems_quarter.cal";
45	+	char            *ciefn = "cieskyscan.cal";
46
47	+	char            *binjitter = NULL;
48		/* string indicating parameters */
49	<	const char      PARAMSTART[] = "@rfluxmtx";
49	>	#define PARAMSTART      "@rfluxmtx"
50
51		/* surface type IDs */
52		#define ST_NONE         0
#	Line 78 | Line 69 | typedef struct {
69		FVECT   uva[2];                 /* tangent axes */
70		int     ntris;                  /* number of triangles */
71		struct ptri {
72	<	float   afrac;                  /* fraction of total area */
72	>	double  afrac;                  /* fraction of total area */
73		short   vndx[3];                /* vertex indices */
74		}       tri[1];                 /* triangle array (extends struct) */
75		} POLYTRIS;                     /* triangulated polygon */
76
77		typedef struct param_s {
78	<	char            hemis[32];      /* hemispherical sampling spec. */
78	>	char            sign;           /* '-' for axis reversal */
79	>	char            hemis[31];      /* hemispherical sampling spec. */
80		int             hsiz;           /* hemisphere basis size */
81		int             nsurfs;         /* number of surfaces */
82		SURF            *slist;         /* list of surfaces */
83		FVECT           vup;            /* up vector (zero if unset) */
84		FVECT           nrm;            /* average normal direction */
85	<	FVECT           udir, vdir;     /* v-up tangent axes */
85	>	FVECT           udir, vdir;     /* tangent axes */
86		char            *outfn;         /* output file name (receiver) */
87		int             (*sample_basis)(struct param_s *p, int, FILE *);
88		} PARAMS;                       /* sender/receiver parameters */
#	Line 108 | Line 100 | SURFSAMP       *orig_in_surf[4] = {
100		};
101
102		/* Clear parameter set */
103	<	static void
103	>	void
104		clear_params(PARAMS *p, int reset_only)
105		{
106		while (p->slist != NULL) {
#	Line 119 | Line 111 | clear_params(PARAMS *p, int reset_only)
111		free(sdel);
112		}
113		if (reset_only) {
114	+	p->slist = NULL;
115		p->nsurfs = 0;
116		memset(p->nrm, 0, sizeof(FVECT));
117		memset(p->vup, 0, sizeof(FVECT));
#	Line 129 | Line 122 | clear_params(PARAMS *p, int reset_only)
122		}
123
124		/* Get surface type from name */
125	<	static int
125	>	int
126		surf_type(const char *otype)
127		{
128		if (!strcmp(otype, "polygon"))
#	Line 142 | Line 135 | surf_type(const char *otype)
135		}
136
137		/* Add arguments to oconv command */
138	<	static char *
138	>	char *
139		oconv_command(int ac, char *av[])
140		{
141		static char     oconvbuf[2048] = "!oconv -f ";
#	Line 151 | Line 144 | oconv_command(int ac, char *av[])
144
145		if (ac-- <= 0)
146		return(NULL);
147	<	while (ac-- > 0) {
148	<	strcpy(cp, *av++);
149	<	while (*cp) cp++;
157	<	*cp++ = ' ';
158	<	if (cp >= oconvbuf+(sizeof(oconvbuf)-32)) {
159	<	fputs(progname, stderr);
160	<	fputs(": too many file arguments!\n", stderr);
161	<	exit(1);
162	<	}
147	>	if (verbose & NOWARN) { /* warnings off? */
148	>	strcpy(cp, "-w ");
149	>	cp += 3;
150		}
151	<	strcpy(cp, recv);       /* receiver goes last */
152	<	return(oconvbuf);
153	<	}
154	<
155	<	/* Check if any of the characters in str2 are found in str1 */
156	<	static int
157	<	matchany(const char *str1, const char *str2)
158	<	{
159	<	while (*str1) {
173	<	const char      *cp = str2;
174	<	while (*cp)
175	<	if (*cp++ == *str1)
176	<	return(*str1);
177	<	++str1;
178	<	}
179	<	return(0);
180	<	}
181	<
182	<
183	<	/* Convert a set of arguments into a command line for pipe() or system() */
184	<	static char *
185	<	convert_commandline(char *cmd, const int len, char *av[])
186	<	{
187	<	int     match;
188	<	char    *cp;
189	<
190	<	for (cp = cmd; *av != NULL; av++) {
191	<	const int       n = strlen(*av);
192	<	if (cp+n >= cmd+(len-3)) {
193	<	fputs(progname, stderr);
194	<	return(NULL);
195	<	}
196	<	if ((match = matchany(*av, SPECIALS))) {
197	<	const int       quote =
198	<	#ifdef ALTQUOT
199	<	(match == QUOTCHAR) ? ALTQUOT :
200	<	#endif
201	<	QUOTCHAR;
202	<	*cp++ = quote;
203	<	strcpy(cp, *av);
204	<	cp += n;
205	<	*cp++ = quote;
151	>	while (ac-- > 0) {      /* copy each argument */
152	>	int     len = strlen(*av);
153	>	if (cp+len+4 >= oconvbuf+sizeof(oconvbuf))
154	>	goto overrun;
155	>	if (matchany(*av, SPECIALS)) {
156	>	*cp++ = QUOTCHAR;
157	>	strcpy(cp, *av++);
158	>	cp += len;
159	>	*cp++ = QUOTCHAR;
160		} else {
161	<	strcpy(cp, *av);
162	<	cp += n;
161	>	strcpy(cp, *av++);
162	>	cp += len;
163		}
164		*cp++ = ' ';
165		}
166	<	if (cp <= cmd)
167	<	return(NULL);
168	<	*--cp = '\0';
169	<	return(cmd);
166	>	/* receiver goes last */
167	>	if (matchany(recv, SPECIALS)) {
168	>	*cp++ = QUOTCHAR;
169	>	while (*recv) {
170	>	if (cp >= oconvbuf+(sizeof(oconvbuf)-3))
171	>	goto overrun;
172	>	*cp++ = *recv++;
173	>	}
174	>	*cp++ = QUOTCHAR;
175	>	*cp = '\0';
176	>	} else
177	>	strcpy(cp, recv);
178	>	return(oconvbuf);
179	>	overrun:
180	>	fputs(progname, stderr);
181	>	fputs(": too many file arguments!\n", stderr);
182	>	exit(1);
183		}
184
185	+	#if defined(_WIN32) || defined(_WIN64)
186	+
187		/* Open a pipe to/from a command given as an argument list */
188	<	static FILE *
188	>	FILE *
189		popen_arglist(char *av[], char *mode)
190		{
191		char    cmd[10240];
#	Line 226 | Line 195 | popen_arglist(char *av[], char *mode)
195		fputs(": command line too long in popen_arglist()\n", stderr);
196		return(NULL);
197		}
198	<	if (verbose > 0)
198	>	if (verbose & VERBO)
199		fprintf(stderr, "%s: opening pipe %s: %s\n",
200		progname, (*mode=='w') ? "to" : "from", cmd);
201		return(popen(cmd, mode));
202		}
203
204	<	#ifdef _WIN32
204	>	#define pclose_al       pclose
205	>
206		/* Execute system command (Windows version) */
207	<	static int
207	>	int
208		my_exec(char *av[])
209		{
210		char    cmd[10240];
#	Line 244 | Line 214 | my_exec(char *av[])
214		fputs(": command line too long in my_exec()\n", stderr);
215		return(1);
216		}
217	<	if (verbose > 0)
217	>	if (verbose & VERBO)
218		fprintf(stderr, "%s: running: %s\n", progname, cmd);
219		return(system(cmd));
220		}
221	<	#else
221	>
222	>	#else   /* UNIX */
223	>
224	>	static SUBPROC  rt_proc = SP_INACTIVE;  /* we only support one of these */
225	>
226	>	/* Open a pipe to a command using an argument list */
227	>	FILE *
228	>	popen_arglist(char *av[], char *mode)
229	>	{
230	>	int     fd;
231	>
232	>	if (rt_proc.pid > 0) {
233	>	fprintf(stderr, "%s: only one i/o pipe at a time!\n", progname);
234	>	return(NULL);
235	>	}
236	>	if (verbose & VERBO) {
237	>	char    cmd[4096];
238	>	if (!convert_commandline(cmd, sizeof(cmd), av))
239	>	strcpy(cmd, "COMMAND TOO LONG TO SHOW");
240	>	fprintf(stderr, "%s: opening pipe %s: %s\n",
241	>	progname, (*mode=='w') ? "to" : "from", cmd);
242	>	}
243	>	if (*mode == 'w') {
244	>	fd = rt_proc.w = dup(fileno(stdout));
245	>	rt_proc.flags |= PF_FILT_OUT;
246	>	} else if (*mode == 'r') {
247	>	fd = rt_proc.r = dup(fileno(stdin));
248	>	rt_proc.flags |= PF_FILT_INP;
249	>	}
250	>	if (fd < 0 || open_process(&rt_proc, av) <= 0) {
251	>	perror(av[0]);
252	>	return(NULL);
253	>	}
254	>	return(fdopen(fd, mode));
255	>	}
256	>
257	>	/* Close command pipe (returns -1 on error to match pclose) */
258	>	int
259	>	pclose_al(FILE *fp)
260	>	{
261	>	int     prob = (fclose(fp) == EOF);
262	>
263	>	if (rt_proc.pid <= 0)
264	>	return(-1);
265	>
266	>	prob |= (close_process(&rt_proc) != 0);
267	>
268	>	return(-prob);
269	>	}
270	>
271		/* Execute system command in our stead (Unix version) */
272	<	static int
272	>	int
273		my_exec(char *av[])
274		{
275		char    *compath;
#	Line 259 | Line 278 | my_exec(char *av[])
278		fprintf(stderr, "%s: cannot locate %s\n", progname, av[0]);
279		return(1);
280		}
281	<	if (verbose > 0) {
281	>	if (verbose & VERBO) {
282		char    cmd[4096];
283		if (!convert_commandline(cmd, sizeof(cmd), av))
284		strcpy(cmd, "COMMAND TOO LONG TO SHOW");
#	Line 269 | Line 288 | my_exec(char *av[])
288		perror(compath);
289		return(1);
290		}
291	+
292		#endif
293
294		/* Get normalized direction vector from string specification */
295	<	static int
295	>	int
296		get_direction(FVECT dv, const char *s)
297		{
298		int     sign = 1;
#	Line 312 | Line 332 | nextchar:
332		}
333
334		/* Parse program parameters (directives) */
335	<	static int
335	>	int
336		parse_params(PARAMS *p, char *pargs)
337		{
338		char    *cp = pargs;
339		int     nparams = 0;
340	+	int     quot;
341		int     i;
342
343		for ( ; ; ) {
#	Line 324 | Line 345 | parse_params(PARAMS *p, char *pargs)
345		case 'h':
346		if (*cp++ != '=')
347		break;
348	+	if ((*cp == '+') | (*cp == '-'))
349	+	p->sign = *cp++;
350	+	else
351	+	p->sign = '+';
352		p->hsiz = 0;
353		i = 0;
354		while (*cp && !isspace(*cp)) {
#	Line 349 | Line 374 | parse_params(PARAMS *p, char *pargs)
374		case 'o':
375		if (*cp++ != '=')
376		break;
377	+	quot = 0;
378	+	if ((*cp == '"') | (*cp == '\''))
379	+	quot = *cp++;
380		i = 0;
381	<	while (*cp && !isspace(*cp++))
382	<	i++;
381	>	while (*cp && (quot ? (*cp != quot) : !isspace(*cp))) {
382	>	i++; cp++;
383	>	}
384		if (!i)
385		break;
386	<	*--cp = '\0';
386	>	if (!*cp) {
387	>	if (quot)
388	>	break;
389	>	cp[1] = '\0';
390	>	}
391	>	*cp = '\0';
392		p->outfn = savqstr(cp-i);
393	<	*cp++ = ' ';
393	>	*cp++ = quot ? quot : ' ';
394		++nparams;
395		continue;
396		case ' ':
397		case '\t':
398		case '\r':
365	–	continue;
399		case '\n':
400	+	continue;
401		case '\0':
402		return(nparams);
403		default:
#	Line 376 | Line 410 | parse_params(PARAMS *p, char *pargs)
410		return(-1);     /* pro forma return */
411		}
412
413	+	/* Append bin jitter to the parameter string */
414	+	int
415	+	addbinjitter(char *s)
416	+	{
417	+	if (binjitter == NULL)
418	+	return(0);
419	+	s += strlen(s);
420	+	strcpy(s, ",JTR=");
421	+	strcpy(s+5, binjitter);
422	+	return(1);
423	+	}
424	+
425		/* Add receiver arguments (directives) corresponding to the current modifier */
426	<	static void
426	>	void
427		finish_receiver(void)
428		{
429		char    sbuf[256];
#	Line 416 | Line 462 | finish_receiver(void)
462		curparams.vup[1] = 1;
463		}
464		/* determine sample type/bin */
465	<	if (tolower(curparams.hemis[0]) == 'u' | curparams.hemis[0] == '1') {
466	<	binv = "0";             /* uniform sampling -- one bin */
465	>	if ((tolower(curparams.hemis[0]) == 'u') | (curparams.hemis[0] == '1')) {
466	>	if (curparams.slist->styp != ST_SOURCE) {
467	>	sprintf(sbuf, "if(-Dx*%g-Dy*%g-Dz*%g,0,-1)",
468	>	curparams.nrm[0], curparams.nrm[1], curparams.nrm[2]);
469	>	binv = savqstr(sbuf);
470	>	} else
471	>	binv = "0";
472	>	nbins = "1";            /* uniform sampling -- one bin */
473		uniform = 1;
474		} else if (tolower(curparams.hemis[0]) == 's' &&
475		tolower(curparams.hemis[1]) == 'c') {
#	Line 428 | Line 480 | finish_receiver(void)
480		exit(1);
481		}
482		calfn = shirchiufn; shirchiufn = NULL;
483	<	sprintf(sbuf, "SCdim=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g",
483	>	sprintf(sbuf, "SCdim=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g,RHS=%c1",
484		curparams.hsiz,
485		curparams.nrm[0], curparams.nrm[1], curparams.nrm[2],
486	<	curparams.vup[0], curparams.vup[1], curparams.vup[2]);
486	>	curparams.vup[0], curparams.vup[1], curparams.vup[2],
487	>	curparams.sign);
488	>	addbinjitter(sbuf);
489		params = savqstr(sbuf);
490		binv = "scbin";
491		nbins = "SCdim*SCdim";
492		} else if ((tolower(curparams.hemis[0]) == 'r') |
493		(tolower(curparams.hemis[0]) == 't')) {
494		calfn = reinhfn; reinhfn = NULL;
495	<	sprintf(sbuf, "MF=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g",
495	>	sprintf(sbuf, "MF=%d,rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g,RHS=%c1",
496		curparams.hsiz,
497		curparams.nrm[0], curparams.nrm[1], curparams.nrm[2],
498	<	curparams.vup[0], curparams.vup[1], curparams.vup[2]);
498	>	curparams.vup[0], curparams.vup[1], curparams.vup[2],
499	>	curparams.sign);
500	>	addbinjitter(sbuf);
501		params = savqstr(sbuf);
502		binv = "rbin";
503		nbins = "Nrbins";
#	Line 464 | Line 520 | finish_receiver(void)
520		calfn = kquarterfn; kquarterfn = NULL;
521		binf = "kqbin";
522		nbins = "Nkqbins";
523	+	} else if (!strcasecmp(curparams.hemis, "cie")) {
524	+	calfn = ciefn; ciefn = NULL;
525	+	sprintf(sbuf, "rNx=%g,rNy=%g,rNz=%g,Ux=%g,Uy=%g,Uz=%g,RHS=%c1",
526	+	curparams.nrm[0], curparams.nrm[1], curparams.nrm[2],
527	+	curparams.vup[0], curparams.vup[1], curparams.vup[2],
528	+	curparams.sign);
529	+	addbinjitter(sbuf);
530	+	params = savqstr(sbuf);
531	+	binv = "cbin";
532	+	nbins = "Ncbins";
533		} else {
534		fprintf(stderr, "%s: unrecognized hemisphere sampling: h=%s\n",
535		progname, curparams.hemis);
536		exit(1);
537		}
538	<	if (!uniform & (curparams.slist->styp == ST_SOURCE)) {
538	>	if (tolower(curparams.hemis[0]) == 'k') {
539	>	sprintf(sbuf, "RHS=%c1", curparams.sign);
540	>	addbinjitter(sbuf);
541	>	params = savqstr(sbuf);
542	>	}
543	>	if (!uniform) {
544		SURF    *sp;
545		for (sp = curparams.slist; sp != NULL; sp = sp->next)
546	<	if (fabs(sp->area - PI) > 1e-3) {
546	>	if (sp->styp == ST_SOURCE && fabs(sp->area - PI) > 1e-3) {
547		fprintf(stderr, "%s: source '%s' must be 180-degrees\n",
548		progname, sp->sname);
549		exit(1);
#	Line 511 | Line 582 | finish_receiver(void)
582		}
583
584		/* Make randomly oriented tangent plane axes for given normal direction */
585	<	static void
585	>	void
586		make_axes(FVECT uva[2], const FVECT nrm)
587		{
588		int     i;
589
590	<	uva[1][0] = 0.5 - frandom();
520	<	uva[1][1] = 0.5 - frandom();
521	<	uva[1][2] = 0.5 - frandom();
522	<	for (i = 3; i--; )
523	<	if ((-0.6 < nrm[i]) & (nrm[i] < 0.6))
524	<	break;
525	<	if (i < 0) {
590	>	if (!getperpendicular(uva[0], nrm, 1)) {
591		fputs(progname, stderr);
592		fputs(": bad surface normal in make_axes!\n", stderr);
593		exit(1);
594		}
595	<	uva[1][i] = 1.0;
531	<	VCROSS(uva[0], uva[1], nrm);
532	<	normalize(uva[0]);
533	<	VCROSS(uva[1], nrm, uva[0]);
595	>	fcross(uva[1], nrm, uva[0]);
596		}
597
598		/* Illegal sender surfaces end up here */
599	<	static int
599	>	int
600		ssamp_bad(FVECT orig, SURF *sp, double x)
601		{
602		fprintf(stderr, "%s: illegal sender surface '%s'\n",
#	Line 543 | Line 605 | ssamp_bad(FVECT orig, SURF *sp, double x)
605		}
606
607		/* Generate origin on ring surface from uniform random variable */
608	<	static int
608	>	int
609		ssamp_ring(FVECT orig, SURF *sp, double x)
610		{
611		FVECT   *uva = (FVECT *)sp->priv;
#	Line 572 | Line 634 | ssamp_ring(FVECT orig, SURF *sp, double x)
634		}
635
636		/* Add triangle to polygon's list (call-back function) */
637	<	static int
637	>	int
638		add_triangle(const Vert2_list *tp, int a, int b, int c)
639		{
640		POLYTRIS        *ptp = (POLYTRIS *)tp->p;
#	Line 585 | Line 647 | add_triangle(const Vert2_list *tp, int a, int b, int c
647		}
648
649		/* Generate origin on polygon surface from uniform random variable */
650	<	static int
650	>	int
651		ssamp_poly(FVECT orig, SURF *sp, double x)
652		{
653		POLYTRIS        *ptp = (POLYTRIS *)sp->priv;
#	Line 639 | Line 701 | ssamp_poly(FVECT orig, SURF *sp, double x)
701		sp->priv = (void *)ptp;
702		}
703		/* pick triangle by partial area */
704	<	for (i = 0; i < ptp->ntris && x > ptp->tri[i].afrac; i++)
704	>	for (i = 0; i < ptp->ntris-1 && x > ptp->tri[i].afrac; i++)
705		x -= ptp->tri[i].afrac;
706		SDmultiSamp(samp2, 2, x/ptp->tri[i].afrac);
707		samp2[0] *= samp2[1] = sqrt(samp2[1]);
#	Line 658 | Line 720 | memerr:
720		}
721
722		/* Compute sample origin based on projected areas of sender subsurfaces */
723	<	static int
723	>	int
724		sample_origin(PARAMS *p, FVECT orig, const FVECT rdir, double x)
725		{
726		static double   *projsa;
#	Line 669 | Line 731 | sample_origin(PARAMS *p, FVECT orig, const FVECT rdir,
731		/* special case for lone surface */
732		if (p->nsurfs == 1) {
733		sp = p->slist;
734	<	if (DOT(sp->snrm, rdir) >= -FTINY) {
734	>	if (DOT(sp->snrm, rdir) >= FTINY) {
735		fprintf(stderr,
736		"%s: internal - sample behind sender '%s'\n",
737		progname, sp->sname);
#	Line 680 | Line 742 | sample_origin(PARAMS *p, FVECT orig, const FVECT rdir,
742		if (p->nsurfs > nall) {         /* (re)allocate surface area cache */
743		if (projsa) free(projsa);
744		projsa = (double *)malloc(sizeof(double)*p->nsurfs);
745	<	if (!projsa) return(0);
745	>	if (projsa == NULL) {
746	>	fputs(progname, stderr);
747	>	fputs(": out of memory in sample_origin!\n", stderr);
748	>	exit(1);
749	>	}
750		nall = p->nsurfs;
751		}
752		/* compute projected areas */
753		for (i = 0, sp = p->slist; sp != NULL; i++, sp = sp->next) {
754		projsa[i] = -DOT(sp->snrm, rdir) * sp->area;
755	<	tarea += projsa[i] *= (double)(projsa[i] > FTINY);
755	>	tarea += projsa[i] *= (double)(projsa[i] > 0);
756		}
757	<	if (tarea <= FTINY) {           /* wrong side of sender? */
757	>	if (tarea < FTINY*FTINY) {      /* wrong side of sender? */
758		fputs(progname, stderr);
759		fputs(": internal - sample behind all sender elements!\n",
760		stderr);
#	Line 701 | Line 767 | sample_origin(PARAMS *p, FVECT orig, const FVECT rdir,
767		}
768
769		/* Uniform sample generator */
770	<	static int
770	>	int
771		sample_uniform(PARAMS *p, int b, FILE *fp)
772		{
773		int     n = sampcnt;
774		double  samp3[3];
775	<	double  duvw[3];
710	<	FVECT   orig_dir[2];
775	>	FVECT   duvw, orig_dir[2];
776		int     i;
777
778		if (fp == NULL)                 /* just requesting number of bins? */
#	Line 715 | Line 780 | sample_uniform(PARAMS *p, int b, FILE *fp)
780
781		while (n--) {                   /* stratified hemisphere sampling */
782		SDmultiSamp(samp3, 3, (n+frandom())/sampcnt);
783	<	SDsquare2disk(duvw, samp3[1], samp3[2]);
783	>	square2disk(duvw, samp3[1], samp3[2]);
784		duvw[2] = -sqrt(1. - duvw[0]*duvw[0] - duvw[1]*duvw[1]);
785		for (i = 3; i--; )
786		orig_dir[1][i] = duvw[0]*p->udir[i] +
#	Line 723 | Line 788 | sample_uniform(PARAMS *p, int b, FILE *fp)
788		duvw[2]*p->nrm[i] ;
789		if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0]))
790		return(0);
791	<	if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2)
791	>	if (putbinary(orig_dir, sizeof(FVECT), 2, fp) != 2)
792		return(0);
793		}
794		return(1);
795		}
796
797		/* Shirly-Chiu sample generator */
798	<	static int
798	>	int
799		sample_shirchiu(PARAMS *p, int b, FILE *fp)
800		{
801		int     n = sampcnt;
802		double  samp3[3];
803	<	double  duvw[3];
739	<	FVECT   orig_dir[2];
803	>	FVECT   duvw, orig_dir[2];
804		int     i;
805
806		if (fp == NULL)                 /* just requesting number of bins? */
#	Line 744 | Line 808 | sample_shirchiu(PARAMS *p, int b, FILE *fp)
808
809		while (n--) {                   /* stratified sampling */
810		SDmultiSamp(samp3, 3, (n+frandom())/sampcnt);
811	<	SDsquare2disk(duvw, (b/p->hsiz + samp3[1])/curparams.hsiz,
811	>	square2disk(duvw, (b/p->hsiz + samp3[1])/curparams.hsiz,
812		(b%p->hsiz + samp3[2])/curparams.hsiz);
813		duvw[2] = sqrt(1. - duvw[0]*duvw[0] - duvw[1]*duvw[1]);
814		for (i = 3; i--; )
#	Line 753 | Line 817 | sample_shirchiu(PARAMS *p, int b, FILE *fp)
817		duvw[2]*p->nrm[i] ;
818		if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0]))
819		return(0);
820	<	if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2)
820	>	if (putbinary(orig_dir, sizeof(FVECT), 2, fp) != 2)
821		return(0);
822		}
823		return(1);
824		}
825
826		/* Reinhart/Tregenza sample generator */
827	<	static int
827	>	int
828		sample_reinhart(PARAMS *p, int b, FILE *fp)
829		{
830		#define T_NALT  7
#	Line 789 | Line 853 | sample_reinhart(PARAMS *p, int b, FILE *fp)
853		}
854		while (n--) {                   /* stratified sampling */
855		SDmultiSamp(samp3, 3, (n+frandom())/sampcnt);
856	+	if (row >= RowMax-1)    /* avoid crowding at zenith */
857	+	samp3[1] *= samp3[1];
858		alt = (row+samp3[1])*RAH;
859		azi = (2.*PI)*(col+samp3[2]-.5)/rnaz(row);
860		duvw[2] = cos(alt);     /* measured from horizon */
861	<	duvw[0] = tcos(azi)*duvw[2];
862	<	duvw[1] = tsin(azi)*duvw[2];
861	>	duvw[0] = tsin(azi)*duvw[2];
862	>	duvw[1] = -tcos(azi)*duvw[2];
863		duvw[2] = sqrt(1. - duvw[2]*duvw[2]);
864		for (i = 3; i--; )
865		orig_dir[1][i] = -duvw[0]*p->udir[i] -
#	Line 801 | Line 867 | sample_reinhart(PARAMS *p, int b, FILE *fp)
867		duvw[2]*p->nrm[i] ;
868		if (!sample_origin(p, orig_dir[0], orig_dir[1], samp3[0]))
869		return(0);
870	<	if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2)
870	>	if (putbinary(orig_dir, sizeof(FVECT), 2, fp) != 2)
871		return(0);
872		}
873		return(1);
#	Line 810 | Line 876 | sample_reinhart(PARAMS *p, int b, FILE *fp)
876		}
877
878		/* Klems sample generator */
879	<	static int
879	>	int
880		sample_klems(PARAMS *p, int b, FILE *fp)
881		{
882		static const char       bname[4][20] = {
#	Line 844 | Line 910 | sample_klems(PARAMS *p, int b, FILE *fp)
910
911		while (n--) {                   /* stratified sampling */
912		SDmultiSamp(samp2, 2, (n+frandom())/sampcnt);
913	<	if (!bo_getvec(duvw, b+samp2[1], kbasis[bi]))
913	>	if (!fo_getvec(duvw, b+samp2[1], kbasis[bi]))
914		return(0);
915		for (i = 3; i--; )
916	<	orig_dir[1][i] = duvw[0]*p->udir[i] +
917	<	duvw[1]*p->vdir[i] +
916	>	orig_dir[1][i] = -duvw[0]*p->udir[i] -
917	>	duvw[1]*p->vdir[i] -
918		duvw[2]*p->nrm[i] ;
919		if (!sample_origin(p, orig_dir[0], orig_dir[1], samp2[0]))
920		return(0);
921	<	if (fwrite(orig_dir, sizeof(FVECT), 2, fp) != 2)
921	>	if (putbinary(orig_dir, sizeof(FVECT), 2, fp) != 2)
922		return(0);
923		}
924		return(1);
925		}
926
927		/* Prepare hemisphere basis sampler that will send rays to rcontrib */
928	<	static int
929	<	prepare_sampler(void)
928	>	int
929	>	prepare_sampler(PARAMS *p)
930		{
931	<	if (curparams.slist == NULL) {  /* missing sample surface! */
931	>	if (p->slist == NULL) { /* missing sample surface! */
932		fputs(progname, stderr);
933		fputs(": no sender surface!\n", stderr);
934		return(-1);
935		}
936		/* misplaced output file spec. */
937	<	if ((curparams.outfn != NULL) & (verbose >= 0))
937	>	if ((p->outfn != NULL) & !(verbose & NOWARN))
938		fprintf(stderr, "%s: warning - ignoring output file in sender ('%s')\n",
939	<	progname, curparams.outfn);
939	>	progname, p->outfn);
940		/* check/set basis hemisphere */
941	<	if (!curparams.hemis[0]) {
941	>	if (!p->hemis[0]) {
942		fputs(progname, stderr);
943		fputs(": missing sender sampling type!\n", stderr);
944		return(-1);
945		}
946	<	if (normalize(curparams.nrm) == 0) {
946	>	if (normalize(p->nrm) == 0) {
947		fputs(progname, stderr);
948		fputs(": undefined normal for sender sampling\n", stderr);
949		return(-1);
950		}
951	<	if (normalize(curparams.vup) == 0) {
952	<	if (fabs(curparams.nrm[2]) < .7)
953	<	curparams.vup[2] = 1;
951	>	if (normalize(p->vup) == 0) {
952	>	if (fabs(p->nrm[2]) < .7)
953	>	p->vup[2] = 1;
954		else
955	<	curparams.vup[1] = 1;
955	>	p->vup[1] = 1;
956		}
957	<	VCROSS(curparams.udir, curparams.vup, curparams.nrm);
958	<	if (normalize(curparams.udir) == 0) {
957	>	fcross(p->udir, p->vup, p->nrm);
958	>	if (normalize(p->udir) == 0) {
959		fputs(progname, stderr);
960		fputs(": up vector coincides with sender normal\n", stderr);
961		return(-1);
962		}
963	<	VCROSS(curparams.vdir, curparams.nrm, curparams.udir);
964	<	if (tolower(curparams.hemis[0]) == 'u' | curparams.hemis[0] == '1')
965	<	curparams.sample_basis = sample_uniform;
966	<	else if (tolower(curparams.hemis[0]) == 's' &&
967	<	tolower(curparams.hemis[1]) == 'c')
968	<	curparams.sample_basis = sample_shirchiu;
969	<	else if ((tolower(curparams.hemis[0]) == 'r') |
970	<	(tolower(curparams.hemis[0]) == 't'))
971	<	curparams.sample_basis = sample_reinhart;
972	<	else if (tolower(curparams.hemis[0]) == 'k') {
973	<	switch (curparams.hemis[1]) {
963	>	fcross(p->vdir, p->nrm, p->udir);
964	>	if (p->sign == '-') {   /* left-handed coordinate system? */
965	>	p->udir[0] *= -1.;
966	>	p->udir[1] *= -1.;
967	>	p->udir[2] *= -1.;
968	>	}
969	>	if ((tolower(p->hemis[0]) == 'u') | (p->hemis[0] == '1'))
970	>	p->sample_basis = sample_uniform;
971	>	else if (tolower(p->hemis[0]) == 's' &&
972	>	tolower(p->hemis[1]) == 'c')
973	>	p->sample_basis = sample_shirchiu;
974	>	else if ((tolower(p->hemis[0]) == 'r') |
975	>	(tolower(p->hemis[0]) == 't'))
976	>	p->sample_basis = sample_reinhart;
977	>	else if (tolower(p->hemis[0]) == 'k') {
978	>	switch (p->hemis[1]) {
979		case '1':
980		case '2':
981		case '4':
#	Line 912 | Line 983 | prepare_sampler(void)
983		case 'f':
984		case 'F':
985		case '\0':
986	<	curparams.hemis[1] = '1';
986	>	p->hemis[1] = '1';
987		break;
988		case 'h':
989		case 'H':
990	<	curparams.hemis[1] = '2';
990	>	p->hemis[1] = '2';
991		break;
992		case 'q':
993		case 'Q':
994	<	curparams.hemis[1] = '4';
994	>	p->hemis[1] = '4';
995		break;
996		default:
997		goto unrecognized;
998		}
999	<	curparams.hemis[2] = '\0';
1000	<	curparams.sample_basis = sample_klems;
999	>	p->hemis[2] = '\0';
1000	>	p->sample_basis = sample_klems;
1001		} else
1002		goto unrecognized;
1003		/* return number of bins */
1004	<	return((*curparams.sample_basis)(&curparams,0,NULL));
1004	>	return((*p->sample_basis)(p,0,NULL));
1005		unrecognized:
1006		fprintf(stderr, "%s: unrecognized sender sampling: h=%s\n",
1007	<	progname, curparams.hemis);
1007	>	progname, p->hemis);
1008		return(-1);
1009		}
1010
1011		/* Compute normal and area for polygon */
1012	<	static int
1012	>	int
1013		finish_polygon(SURF *p)
1014		{
1015		const int       nv = p->nfargs / 3;
#	Line 956 | Line 1027 | finish_polygon(SURF *p)
1027		VCOPY(e1, e2);
1028		}
1029		p->area = normalize(p->snrm)*0.5;
1030	<	return(p->area > FTINY);
1030	>	return(p->area > FTINY*FTINY);
1031		}
1032
1033		/* Add a surface to our current parameters */
1034	<	static void
1034	>	void
1035		add_surface(int st, const char *oname, FILE *fp)
1036		{
1037		SURF    *snew;
#	Line 974 | Line 1045 | add_surface(int st, const char *oname, FILE *fp)
1045		snew = (SURF *)malloc(sizeof(SURF) + sizeof(double)*(n-1));
1046		if (snew == NULL) {
1047		fputs(progname, stderr);
1048	<	fputs(": out of memory!\n", stderr);
1048	>	fputs(": out of memory in add_surface!\n", stderr);
1049		exit(1);
1050		}
1051		strncpy(snew->sname, oname, sizeof(snew->sname)-1);
#	Line 1019 | Line 1090 | add_surface(int st, const char *oname, FILE *fp)
1090		snew->area *= PI*snew->area;
1091		break;
1092		}
1093	<	if ((snew->area <= FTINY) & (verbose >= 0)) {
1093	>	if ((snew->area <= FTINY*FTINY) & !(verbose & NOWARN)) {
1094		fprintf(stderr, "%s: warning - zero area for surface '%s'\n",
1095		progname, oname);
1096		free(snew);
#	Line 1041 | Line 1112 | badnorm:
1112		}
1113
1114		/* Parse a receiver object (look for modifiers to add to rcontrib command) */
1115	<	static int
1115	>	int
1116		add_recv_object(FILE *fp)
1117		{
1118		int             st;
#	Line 1056 | Line 1127 | add_recv_object(FILE *fp)
1127		}
1128		/* is it a new receiver? */
1129		if ((st = surf_type(otype)) != ST_NONE) {
1059	–	if (curparams.slist != NULL && (st == ST_SOURCE) ^
1060	–	(curparams.slist->styp == ST_SOURCE)) {
1061	–	fputs(progname, stderr);
1062	–	fputs(": cannot mix source/non-source receivers!\n", stderr);
1063	–	return(-1);
1064	–	}
1130		if (strcmp(thismod, curmod)) {
1131		if (curmod[0]) {        /* output last receiver? */
1132		finish_receiver();
#	Line 1085 | Line 1150 | add_recv_object(FILE *fp)
1150		}
1151
1152		/* Parse a sender object */
1153	<	static int
1153	>	int
1154		add_send_object(FILE *fp)
1155		{
1156		int             st;
1157	<	char            otype[32], oname[128];
1157	>	char            thismod[128], otype[32], oname[128];
1158		int             n;
1159
1160	<	if (fscanf(fp, "%*s %s %s", otype, oname) != 2)
1160	>	if (fscanf(fp, "%s %s %s", thismod, otype, oname) != 3)
1161		return(0);              /* must have hit EOF! */
1162		if (!strcmp(otype, "alias")) {
1163		fscanf(fp, "%*s");      /* skip alias */
#	Line 1105 | Line 1170 | add_send_object(FILE *fp)
1170		fputs(": cannot use source as a sender!\n", stderr);
1171		return(-1);
1172		}
1173	+	if (strcmp(thismod, curmod)) {
1174	+	if (curmod[0]) {
1175	+	fputs(progname, stderr);
1176	+	fputs(": warning - multiple modifiers in sender\n",
1177	+	stderr);
1178	+	}
1179	+	strcpy(curmod, thismod);
1180	+	}
1181		parse_params(&curparams, newparams);
1182		newparams[0] = '\0';
1183		add_surface(st, oname, fp);     /* read & store surface */
#	Line 1121 | Line 1194 | add_send_object(FILE *fp)
1194		}
1195
1196		/* Load a Radiance scene using the given callback function for objects */
1197	<	static int
1197	>	int
1198		load_scene(const char *inspec, int (*ocb)(FILE *))
1199		{
1200		int     rv = 0;
#	Line 1185 | Line 1258 | main(int argc, char *argv[])
1258		char    *xrs=NULL, *yrs=NULL, *ldopt=NULL;
1259		char    *iropt = NULL;
1260		char    *sendfn;
1261	<	char    sampcntbuf[32], nsbinbuf[32];
1261	>	char    sampcntbuf[32], nsbinbuf[32], binjitbuf[32];
1262		FILE    *rcfp;
1263		int     nsbins;
1264		int     a, i;
1265	+	/* set global progname */
1266	+	fixargv0(argv[0]);
1267		/* screen rcontrib options */
1193	–	progname = argv[0];
1268		for (a = 1; a < argc-2; a++) {
1269		int     na;
1270		/* check for argument expansion */
#	Line 1206 | Line 1280 | main(int argc, char *argv[])
1280		na = 1;
1281		switch (argv[a][1]) {   /* !! Keep consistent !! */
1282		case 'v':               /* verbose mode */
1283	<	verbose = 1;
1283	>	verbose ^= VERBO;
1284		na = 0;
1285		continue;
1286		case 'f':               /* special case for -fo, -ff, etc. */
1287		switch (argv[a][2]) {
1288		case '\0':              /* cal file */
1289	<	goto userr;
1289	>	na = 2;
1290	>	break;
1291		case 'o':               /* force output */
1292		goto userr;
1293		case 'a':               /* output format */
#	Line 1236 | Line 1311 | main(int argc, char *argv[])
1311		yrs = argv[++a];
1312		na = 0;
1313		continue;
1314	<	case 'c':               /* number of samples */
1315	<	sampcnt = atoi(argv[++a]);
1316	<	if (sampcnt <= 0)
1317	<	goto userr;
1318	<	na = 0;         /* we re-add this later */
1319	<	continue;
1314	>	case 'c':               /* spectral sampling or count */
1315	>	switch (argv[a][2]) {
1316	>	case 's':
1317	>	na = 2;
1318	>	break;
1319	>	case 'w':
1320	>	na = 3;
1321	>	break;
1322	>	case '\0':
1323	>	sampcnt = atoi(argv[++a]);
1324	>	if (sampcnt <= 0)
1325	>	goto userr;
1326	>	na = 0;         /* we re-add this later */
1327	>	continue;
1328	>	}
1329	>	break;
1330		case 'I':               /* only for pass-through mode */
1331		case 'i':
1332		iropt = argv[a];
1333		na = 0;
1334		continue;
1335		case 'w':               /* options without arguments */
1336	<	if (argv[a][2] != '+') verbose = -1;
1336	>	if (!argv[a][2])
1337	>	verbose ^= NOWARN;
1338	>	else if (strchr("+1tTyY", argv[a][2]) != NULL)
1339	>	verbose &= ~NOWARN;
1340	>	else
1341	>	verbose |= NOWARN;
1342	>	break;
1343		case 'V':
1344		case 'u':
1345		case 'h':
#	Line 1257 | Line 1348 | main(int argc, char *argv[])
1348		case 'n':               /* options with 1 argument */
1349		case 's':
1350		case 'o':
1351	+	case 't':
1352	+	case 'e':
1353		na = 2;
1354		break;
1355		case 'b':               /* special case */
1356	+	if (argv[a][2] == 'j') {
1357	+	binjitter = argv[++a];
1358	+	na = 0;
1359	+	continue;
1360	+	}
1361		if (argv[a][2] != 'v') goto userr;
1362		break;
1363		case 'l':               /* special case */
#	Line 1274 | Line 1372 | main(int argc, char *argv[])
1372		if (argv[a][2] != 'v') na = 2;
1373		break;
1374		case 'a':               /* special case */
1375	<	na = (argv[a][2] == 'v') ? 4 : 2;
1375	>	if (argv[a][2] == 'p') {
1376	>	na = 2; /* photon map [+ bandwidth(s)] */
1377	>	if (a < argc-3 && atoi(argv[a+1]) > 0)
1378	>	na += 1 + (a < argc-4 && atoi(argv[a+2]) > 0);
1379	>	} else
1380	>	na = (argv[a][2] == 'v') ? 4 : 2;
1381		break;
1382		case 'm':               /* special case */
1383		if (!argv[a][2]) goto userr;
#	Line 1320 | Line 1423 | main(int argc, char *argv[])
1423		fputs(": -i, -I supported for pass-through only\n", stderr);
1424		return(1);
1425		}
1426	<	fmtopt[2] = (sizeof(RREAL)==sizeof(double)) ? 'd' : 'f';
1426	>	#ifdef SMLFLT
1427	>	fmtopt[2] = 'f';
1428	>	#else
1429	>	fmtopt[2] = 'd';
1430	>	#endif
1431		if (sampcnt <= 0) sampcnt = 10000;
1432		}
1433		sprintf(sampcntbuf, "%d", sampcnt);
#	Line 1339 | Line 1446 | main(int argc, char *argv[])
1446		return(my_exec(rcarg)); /* rcontrib does everything */
1447		}
1448		clear_params(&curparams, 0);    /* else load sender surface & params */
1449	+	curmod[0] = '\0';
1450		if (load_scene(sendfn, add_send_object) < 0)
1451		return(1);
1452	<	if ((nsbins = prepare_sampler()) <= 0)
1452	>	if ((nsbins = prepare_sampler(&curparams)) <= 0)
1453		return(1);
1454		CHECKARGC(3);                   /* add row count and octree */
1455		rcarg[nrcargs++] = "-y";
#	Line 1356 | Line 1464 | main(int argc, char *argv[])
1464		#ifdef getc_unlocked
1465		flockfile(rcfp);
1466		#endif
1467	<	if (verbose) {
1467	>	if (verbose & VERBO) {
1468		fprintf(stderr, "%s: sampling %d directions", progname, nsbins);
1469		if (curparams.nsurfs > 1)
1470		fprintf(stderr, " (%d elements)\n", curparams.nsurfs);
#	Line 1366 | Line 1474 | main(int argc, char *argv[])
1474		for (i = 0; i < nsbins; i++)    /* send rcontrib ray samples */
1475		if (!(*curparams.sample_basis)(&curparams, i, rcfp))
1476		return(1);
1477	<	return(pclose(rcfp) == 0);      /* all finished! */
1477	>	return(pclose_al(rcfp) < 0);    /* all finished! */
1478		userr:
1479		if (a < argc-2)
1480	<	fprintf(stderr, "%s: unsupported option '%s'", progname, argv[a]);
1481	<	fprintf(stderr, "Usage: %s [-v][rcontrib options] sender.rad receiver.rad [-i system.oct] [system.rad ..]\n",
1480	>	fprintf(stderr, "%s: unsupported option '%s'\n", progname, argv[a]);
1481	>	fprintf(stderr, "Usage: %s [-v][-bj frac][rcontrib options] sender.rad receiver.rad [-i system.oct] [system.rad ..]\n",
1482		progname);
1483		return(1);
1484		}

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