src/rt/rcmain.c

#ifndef lint
static const char       RCSid[] = "$Id: rcmain.c,v 2.29 2023/02/25 16:17:11 greg Exp $";
#endif
/*
 *  rcmain.c - main for rtcontrib ray contribution tracer
 */

#include "copyright.h"

#include <signal.h>
#include <time.h>
#include "rcontrib.h"
#include "random.h"
#include "source.h"
#include "ambient.h"
#include "pmapray.h"
#include "pmapcontrib.h"

int     gargc;                          /* global argc */
char    **gargv;                        /* global argv */
char    *octname;                       /* global octree name */
char    *progname;                      /* global argv[0] */

char    *sigerr[NSIG];                  /* signal error messages */

int     nproc = 1;                      /* number of processes requested */
int     nchild = 0;                     /* number of children (-1 in child) */

int     inpfmt = 'a';                   /* input format */
int     outfmt = 'a';                   /* output format */

int     header = 1;                     /* output header? */
int     force_open = 0;                 /* truncate existing output? */
int     recover = 0;                    /* recover previous output? */
int     accumulate = 1;                 /* input rays per output record */
int     contrib = 0;                    /* computing contributions? */

int     xres = 0;                       /* horizontal (scan) size */
int     yres = 0;                       /* vertical resolution */

int     using_stdout = 0;               /* are we using stdout? */

int     imm_irrad = 0;                  /* compute immediate irradiance? */
int     lim_dist = 0;                   /* limit distance? */

int     report_intvl = 0;               /* reporting interval (seconds) */

char    **modname = NULL;               /* ordered modifier name list */
int     nmods = 0;                      /* number of modifiers */
int     modasiz = 0;                    /* allocated modifier array size */

void    (*addobjnotify[8])() = {ambnotify, NULL};

char    RCCONTEXT[] = "RC.";            /* our special evaluation context */

#if defined(_WIN32) || defined(_WIN64)
#define RCONTRIB_FEATURES       "Accumulation\nSummation\nRecovery\n" \
                                "ValueContribution\nImmediateIrradiance\n" \
                                "ProgressReporting\nDistanceLimiting\n" \
                                "Outputs=V,W\n"
#else
#define RCONTRIB_FEATURES       "Multiprocessing\n" \
                                "Accumulation\nSummation\nRecovery\n" \
                                "ValueContribution\nImmediateIrradiance\n" \
                                "ProgressReporting\nDistanceLimiting\n" \
                                "Outputs=V,W\n"
#endif

static void
printdefaults(void)                     /* print default values to stdout */
{
        printf("-c %-5d\t\t\t# accumulated rays per record\n", accumulate);
        printf("-V%c\t\t\t\t# output %s\n", contrib ? '+' : '-',
                        contrib ? "contributions" : "coefficients");
        if (imm_irrad)
                printf("-I+\t\t\t\t# immediate irradiance on\n");
        printf("-n %-2d\t\t\t\t# number of rendering processes\n", nproc);
        printf("-x %-9d\t\t\t# %s\n", xres,
                        yres && xres ? "x resolution" : "flush interval");
        printf("-y %-9d\t\t\t# y resolution\n", yres);
        printf(lim_dist ? "-ld+\t\t\t\t# limit distance on\n" :
                        "-ld-\t\t\t\t# limit distance off\n");
        printf("-h%c\t\t\t\t# %s header\n", header ? '+' : '-',
                        header ? "output" : "no");
        printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
                        inpfmt, outfmt, formstr(inpfmt), formstr(outfmt));
        printf(erract[WARNING].pf != NULL ?
                        "-w+\t\t\t\t# warning messages on\n" :
                        "-w-\t\t\t\t# warning messages off\n");
        print_rdefaults();
}


static void
onsig(                          /* fatal signal */
        int  signo
)
{
        static int  gotsig = 0;

        if (gotsig++)                   /* two signals and we're gone! */
                _exit(signo);

#ifdef SIGALRM
        alarm(15);                      /* allow 15 seconds to clean up */
        signal(SIGALRM, SIG_DFL);       /* make certain we do die */
#endif
        eputs("signal - ");
        eputs(sigerr[signo]);
        eputs("\n");
        quit(3);
}


static void
sigdie(                 /* set fatal signal */
        int  signo,
        char  *msg
)
{
        if (signal(signo, onsig) == SIG_IGN)
                signal(signo, SIG_IGN);
        sigerr[signo] = msg;
}


/* set input/output format */
static void
setformat(const char *fmt)
{
        switch (fmt[0]) {
        case 'f':
        case 'd':
                SET_FILE_BINARY(stdin);
                /* fall through */
        case 'a':
                inpfmt = fmt[0];
                break;
        default:
                goto fmterr;
        }
        switch (fmt[1]) {
        case '\0':
                outfmt = inpfmt;
                return;
        case 'a':
        case 'f':
        case 'd':
        case 'c':
                outfmt = fmt[1];
                break;
        default:
                goto fmterr;
        }
        if (!fmt[2])
                return;
fmterr:
        sprintf(errmsg, "Illegal i/o format: -f%s", fmt);
        error(USER, errmsg);
}


/* Set overriding options */
static void
override_options(void)
{
        shadthresh = 0;
        ambssamp = 0;
        ambacc = 0;
        if (accumulate <= 0)    /* no output flushing for single record */
                xres = yres = 0;
}


int
main(int argc, char *argv[])
{
#define  check(ol,al)           if (argv[i][ol] || \
                                badarg(argc-i-1,argv+i+1,al)) \
                                goto badopt
#define  check_bool(olen,var)           switch (argv[i][olen]) { \
                                case '\0': var = !var; break; \
                                case 'y': case 'Y': case 't': case 'T': \
                                case '+': case '1': var = 1; break; \
                                case 'n': case 'N': case 'f': case 'F': \
                                case '-': case '0': var = 0; break; \
                                default: goto badopt; }
        char    *curout = NULL;
        char    *prms = NULL;
        char    *binval = NULL;
        int     bincnt = 0;
        int     rval;
        int     i;
                                        /* global program name */
        progname = argv[0] = fixargv0(argv[0]);
        gargv = argv;
        gargc = argc;
                                        /* feature check only? */
        strcat(RFeatureList, RCONTRIB_FEATURES);
        if (argc > 1 && !strcmp(argv[1], "-features"))
                return feature_status(argc-2, argv+2);
#if defined(_WIN32) || defined(_WIN64)  /* increase file limit to maximum */
        for (i = 8192; i > _IOB_ENTRIES; i >>= 1)
                if (_setmaxstdio(i) == i)
                        break;
#endif
                                        /* initialize calcomp routines early */
        initfunc();
        calcontext(RCCONTEXT);
                                        /* option city */
        for (i = 1; i < argc; i++) {
                                                /* expand arguments */
                while ((rval = expandarg(&argc, &argv, i)) > 0)
                        ;
                if (rval < 0) {
                        sprintf(errmsg, "cannot expand '%s'", argv[i]);
                        error(SYSTEM, errmsg);
                }
                if (argv[i] == NULL || argv[i][0] != '-')
                        break;                  /* break from options */
                if (!strcmp(argv[i], "-version")) {
                        puts(VersionID);
                        quit(0);
                }
                if (!strcmp(argv[i], "-defaults") ||
                                !strcmp(argv[i], "-help")) {
                        override_options();
                        printdefaults();
                        quit(0);
                }
                rval = getrenderopt(argc-i, argv+i);
                if (rval >= 0) {
                        i += rval;
                        continue;
                }
                switch (argv[i][1]) {
                case 'n':                       /* number of cores */
                        check(2,"i");
                        nproc = atoi(argv[++i]);
                        if (nproc <= 0)
                                error(USER, "bad number of processes");
                        break;
                case 'V':                       /* output contributions */
                        check_bool(2,contrib);
                        break;
                case 'x':                       /* x resolution */
                        check(2,"i");
                        xres = atoi(argv[++i]);
                        break;
                case 'y':                       /* y resolution */
                        check(2,"i");
                        yres = atoi(argv[++i]);
                        break;
                case 'w':                       /* warnings */
                        rval = (erract[WARNING].pf != NULL);
                        check_bool(2,rval);
                        if (rval) erract[WARNING].pf = wputs;
                        else erract[WARNING].pf = NULL;
                        break;
                case 'e':                       /* expression */
                        check(2,"s");
                        scompile(argv[++i], NULL, 0);
                        break;
                case 'l':                       /* limit distance */
                        if (argv[i][2] != 'd')
                                goto badopt;
                        check_bool(3,lim_dist);
                        break;
                case 'I':                       /* immed. irradiance */
                        check_bool(2,imm_irrad);
                        break;
                case 'f':                       /* file or force or format */
                        if (!argv[i][2]) {
                                check(2,"s");
                                loadfunc(argv[++i]);
                                break;
                        }
                        if (argv[i][2] == 'o') {
                                check_bool(3,force_open);
                                break;
                        }
                        setformat(argv[i]+2);
                        break;
                case 'o':                       /* output */
                        check(2,"s");
                        curout = argv[++i];
                        break;
                case 'c':                       /* input rays per output */
                        check(2,"i");
                        accumulate = atoi(argv[++i]);
                        break;
                case 'r':                       /* recover output */
                        check_bool(2,recover);
                        break;
                case 'h':                       /* header output */
                        check_bool(2,header);
                        break;
                case 'p':                       /* parameter setting(s) */
                        check(2,"s");
                        set_eparams(prms = argv[++i]);
                        break;
                case 'b':                       /* bin expression/count */
                        if (argv[i][2] == 'n') {
                                check(3,"s");
                                bincnt = (int)(eval(argv[++i]) + .5);
                                break;
                        }
                        check(2,"s");
                        binval = argv[++i];
                        break;
                case 'm':                       /* modifier name */
                        check(2,"s");
                        addmodifier(argv[++i], curout, prms, binval, bincnt);
                        break;
                case 'M':                       /* modifier file */
                        check(2,"s");
                        addmodfile(argv[++i], curout, prms, binval, bincnt);
                        break;
                case 't':                       /* reporting interval */
                        check(2,"i");
                        report_intvl = atoi(argv[++i]);
                        break;
                default:
                        goto badopt;
                }
        }
        if (nmods <= 0)
                error(USER, "missing required modifier argument");
                                        /* override some option settings */
        override_options();
                                        /* initialize object types */
        initotypes();
                                        /* initialize urand */
        if (rand_samp) {
                srandom((long)time(0));
                initurand(0);
        } else {
                srandom(0L);
                initurand(2048);
        }
                                        /* set up signal handling */
        sigdie(SIGINT, "Interrupt");
#ifdef SIGHUP
        sigdie(SIGHUP, "Hangup");
#endif
        sigdie(SIGTERM, "Terminate");
#ifdef SIGPIPE
        sigdie(SIGPIPE, "Broken pipe");
#endif
#ifdef SIGALRM
        sigdie(SIGALRM, "Alarm clock");
#endif
#ifdef  SIGXCPU
        sigdie(SIGXCPU, "CPU limit exceeded");
        sigdie(SIGXFSZ, "File size exceeded");
#endif
#ifdef  NICE
        nice(NICE);                     /* lower priority */
#endif
                                        /* get octree */
        if (i == argc)
                octname = NULL;
        else if (i == argc-1)
                octname = argv[i];
        else
                goto badopt;
        if (octname == NULL)
                error(USER, "missing octree argument");

        readoct(octname, ~(IO_FILES|IO_INFO), &thescene, NULL);
        nsceneobjs = nobjects;

        /* PMAP: set up & load photon maps */
        ray_init_pmap();     
        
        marksources();                  /* find and mark sources */
        
        /* PMAP: init photon map for light source contributions */
        initPmapContrib(&modconttab, nmods);

        setambient();                   /* initialize ambient calculation */
        
        rcontrib();                     /* trace ray contributions (loop) */

        ambsync();                      /* flush ambient file */

        /* PMAP: free photon maps */
        ray_done_pmap();     
        
        quit(0);        /* exit clean */

badopt:
        fprintf(stderr,
"Usage: %s [-n nprocs][-V][-c count][-r][-e expr][-f source][-o ospec][-p p1=V1,p2=V2][-b binv][-bn N] {-m mod | -M file} [rtrace options] octree\n",
                        progname);
        sprintf(errmsg, "command line error at '%s'", argv[i]);
        error(USER, errmsg);
        return(1);      /* pro forma return */

#undef  check
#undef  check_bool
}


void
wputs(                          /* warning output function */
        const char      *s
)
{
        int  lasterrno = errno;
        eputs(s);
        errno = lasterrno;
}


void
eputs(                          /* put string to stderr */
        const char  *s
)
{
        static int  midline = 0;

        if (!*s)
                return;
        if (!midline++) {
                fputs(progname, stderr);
                fputs(": ", stderr);
        }
        fputs(s, stderr);
        if (s[strlen(s)-1] == '\n') {
                fflush(stderr);
                midline = 0;
        }
}
Revision:	2.30
Committed:	Fri Apr 7 15:00:11 2023 UTC (2 years, 6 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.29:	+2 -2 lines
Log Message:	fix(rcontrib): Bug in new code to maximize open file descriptor limit
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.30	static const char RCSid[] = "$Id: rcmain.c,v 2.29 2023/02/25 16:17:11 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* rcmain.c - main for rtcontrib ray contribution tracer
6			*/
7
8			#include "copyright.h"
9
10			#include <signal.h>
11	greg	2.10	#include <time.h>
12	greg	2.1	#include "rcontrib.h"
13	greg	2.6	#include "random.h"
14	greg	2.1	#include "source.h"
15			#include "ambient.h"
16	greg	2.14	#include "pmapray.h"
17			#include "pmapcontrib.h"
18	greg	2.1
19			int gargc; /* global argc */
20			char *gargv; / global argv */
21			char octname; / global octree name */
22			char progname; / global argv[0] */
23
24			char sigerr[NSIG]; / signal error messages */
25
26			int nproc = 1; /* number of processes requested */
27			int nchild = 0; /* number of children (-1 in child) */
28
29			int inpfmt = 'a'; /* input format */
30			int outfmt = 'a'; /* output format */
31
32			int header = 1; /* output header? */
33			int force_open = 0; /* truncate existing output? */
34			int recover = 0; /* recover previous output? */
35			int accumulate = 1; /* input rays per output record */
36			int contrib = 0; /* computing contributions? */
37
38			int xres = 0; /* horizontal (scan) size */
39			int yres = 0; /* vertical resolution */
40
41			int using_stdout = 0; /* are we using stdout? */
42
43			int imm_irrad = 0; /* compute immediate irradiance? */
44			int lim_dist = 0; /* limit distance? */
45
46	greg	2.19	int report_intvl = 0; /* reporting interval (seconds) */
47
48	greg	2.20	char *modname = NULL; / ordered modifier name list */
49			int nmods = 0; /* number of modifiers */
50			int modasiz = 0; /* allocated modifier array size */
51	greg	2.1
52	greg	2.4	void (*addobjnotify[8])() = {ambnotify, NULL};
53
54	greg	2.18	char RCCONTEXT[] = "RC."; /* our special evaluation context */
55	greg	2.1
56	greg	2.22	#if defined(_WIN32) \|\| defined(_WIN64)
57	greg	2.23	#define RCONTRIB_FEATURES "Accumulation\nSummation\nRecovery\n" \
58	greg	2.22	"ValueContribution\nImmediateIrradiance\n" \
59	greg	2.24	"ProgressReporting\nDistanceLimiting\n" \
60			"Outputs=V,W\n"
61	greg	2.22	#else
62			#define RCONTRIB_FEATURES "Multiprocessing\n" \
63	greg	2.23	"Accumulation\nSummation\nRecovery\n" \
64	greg	2.22	"ValueContribution\nImmediateIrradiance\n" \
65	greg	2.24	"ProgressReporting\nDistanceLimiting\n" \
66			"Outputs=V,W\n"
67	greg	2.22	#endif
68	greg	2.1
69			static void
70			printdefaults(void) /* print default values to stdout */
71			{
72	greg	2.3	printf("-c %-5d\t\t\t# accumulated rays per record\n", accumulate);
73			printf("-V%c\t\t\t\t# output %s\n", contrib ? '+' : '-',
74			contrib ? "contributions" : "coefficients");
75	greg	2.1	if (imm_irrad)
76			printf("-I+\t\t\t\t# immediate irradiance on\n");
77			printf("-n %-2d\t\t\t\t# number of rendering processes\n", nproc);
78			printf("-x %-9d\t\t\t# %s\n", xres,
79			yres && xres ? "x resolution" : "flush interval");
80			printf("-y %-9d\t\t\t# y resolution\n", yres);
81			printf(lim_dist ? "-ld+\t\t\t\t# limit distance on\n" :
82			"-ld-\t\t\t\t# limit distance off\n");
83			printf("-h%c\t\t\t\t# %s header\n", header ? '+' : '-',
84			header ? "output" : "no");
85			printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
86			inpfmt, outfmt, formstr(inpfmt), formstr(outfmt));
87			printf(erract[WARNING].pf != NULL ?
88			"-w+\t\t\t\t# warning messages on\n" :
89			"-w-\t\t\t\t# warning messages off\n");
90			print_rdefaults();
91			}
92
93
94			static void
95			onsig( /* fatal signal */
96			int signo
97			)
98			{
99			static int gotsig = 0;
100
101			if (gotsig++) /* two signals and we're gone! */
102			_exit(signo);
103
104			#ifdef SIGALRM
105			alarm(15); /* allow 15 seconds to clean up */
106			signal(SIGALRM, SIG_DFL); /* make certain we do die */
107			#endif
108			eputs("signal - ");
109			eputs(sigerr[signo]);
110			eputs("\n");
111			quit(3);
112			}
113
114
115			static void
116			sigdie( /* set fatal signal */
117			int signo,
118			char *msg
119			)
120			{
121			if (signal(signo, onsig) == SIG_IGN)
122			signal(signo, SIG_IGN);
123			sigerr[signo] = msg;
124			}
125
126
127			/* set input/output format */
128			static void
129			setformat(const char *fmt)
130			{
131			switch (fmt[0]) {
132			case 'f':
133			case 'd':
134			SET_FILE_BINARY(stdin);
135			/* fall through */
136			case 'a':
137			inpfmt = fmt[0];
138			break;
139			default:
140			goto fmterr;
141			}
142			switch (fmt[1]) {
143			case '\0':
144			outfmt = inpfmt;
145			return;
146			case 'a':
147			case 'f':
148			case 'd':
149			case 'c':
150			outfmt = fmt[1];
151			break;
152			default:
153			goto fmterr;
154			}
155			if (!fmt[2])
156			return;
157			fmterr:
158			sprintf(errmsg, "Illegal i/o format: -f%s", fmt);
159			error(USER, errmsg);
160			}
161
162
163			/* Set overriding options */
164			static void
165			override_options(void)
166			{
167			shadthresh = 0;
168			ambssamp = 0;
169			ambacc = 0;
170			if (accumulate <= 0) /* no output flushing for single record */
171			xres = yres = 0;
172			}
173
174
175			int
176			main(int argc, char *argv[])
177			{
178			#define check(ol,al) if (argv[i][ol] \|\| \
179			badarg(argc-i-1,argv+i+1,al)) \
180			goto badopt
181	schorsch	2.15	#define check_bool(olen,var) switch (argv[i][olen]) { \
182	greg	2.1	case '\0': var = !var; break; \
183			case 'y': case 'Y': case 't': case 'T': \
184			case '+': case '1': var = 1; break; \
185			case 'n': case 'N': case 'f': case 'F': \
186			case '-': case '0': var = 0; break; \
187			default: goto badopt; }
188			char *curout = NULL;
189	greg	2.12	char *prms = NULL;
190	greg	2.1	char *binval = NULL;
191			int bincnt = 0;
192			int rval;
193			int i;
194			/* global program name */
195			progname = argv[0] = fixargv0(argv[0]);
196			gargv = argv;
197			gargc = argc;
198	greg	2.22	/* feature check only? */
199			strcat(RFeatureList, RCONTRIB_FEATURES);
200	greg	2.26	if (argc > 1 && !strcmp(argv[1], "-features"))
201	greg	2.22	return feature_status(argc-2, argv+2);
202	greg	2.28	#if defined(_WIN32) \|\| defined(_WIN64) /* increase file limit to maximum */
203			for (i = 8192; i > _IOB_ENTRIES; i >>= 1)
204	greg	2.30	if (_setmaxstdio(i) == i)
205	greg	2.28	break;
206	greg	2.17	#endif
207	greg	2.1	/* initialize calcomp routines early */
208			initfunc();
209	greg	2.21	calcontext(RCCONTEXT);
210	greg	2.1	/* option city */
211			for (i = 1; i < argc; i++) {
212			/* expand arguments */
213			while ((rval = expandarg(&argc, &argv, i)) > 0)
214			;
215			if (rval < 0) {
216			sprintf(errmsg, "cannot expand '%s'", argv[i]);
217			error(SYSTEM, errmsg);
218			}
219			if (argv[i] == NULL \|\| argv[i][0] != '-')
220			break; /* break from options */
221			if (!strcmp(argv[i], "-version")) {
222			puts(VersionID);
223			quit(0);
224			}
225			if (!strcmp(argv[i], "-defaults") \|\|
226			!strcmp(argv[i], "-help")) {
227			override_options();
228			printdefaults();
229			quit(0);
230			}
231			rval = getrenderopt(argc-i, argv+i);
232			if (rval >= 0) {
233			i += rval;
234			continue;
235			}
236			switch (argv[i][1]) {
237			case 'n': /* number of cores */
238			check(2,"i");
239			nproc = atoi(argv[++i]);
240			if (nproc <= 0)
241			error(USER, "bad number of processes");
242			break;
243			case 'V': /* output contributions */
244	schorsch	2.15	check_bool(2,contrib);
245	greg	2.1	break;
246			case 'x': /* x resolution */
247			check(2,"i");
248			xres = atoi(argv[++i]);
249			break;
250			case 'y': /* y resolution */
251			check(2,"i");
252			yres = atoi(argv[++i]);
253			break;
254			case 'w': /* warnings */
255	greg	2.2	rval = (erract[WARNING].pf != NULL);
256	schorsch	2.15	check_bool(2,rval);
257	greg	2.1	if (rval) erract[WARNING].pf = wputs;
258			else erract[WARNING].pf = NULL;
259			break;
260			case 'e': /* expression */
261			check(2,"s");
262			scompile(argv[++i], NULL, 0);
263			break;
264			case 'l': /* limit distance */
265			if (argv[i][2] != 'd')
266			goto badopt;
267	schorsch	2.15	check_bool(3,lim_dist);
268	greg	2.1	break;
269			case 'I': /* immed. irradiance */
270	schorsch	2.15	check_bool(2,imm_irrad);
271	greg	2.1	break;
272			case 'f': /* file or force or format */
273			if (!argv[i][2]) {
274			check(2,"s");
275			loadfunc(argv[++i]);
276			break;
277			}
278			if (argv[i][2] == 'o') {
279	schorsch	2.15	check_bool(3,force_open);
280	greg	2.1	break;
281			}
282			setformat(argv[i]+2);
283			break;
284			case 'o': /* output */
285			check(2,"s");
286			curout = argv[++i];
287			break;
288			case 'c': /* input rays per output */
289			check(2,"i");
290			accumulate = atoi(argv[++i]);
291			break;
292			case 'r': /* recover output */
293	schorsch	2.15	check_bool(2,recover);
294	greg	2.1	break;
295			case 'h': /* header output */
296	schorsch	2.15	check_bool(2,header);
297	greg	2.1	break;
298	greg	2.12	case 'p': /* parameter setting(s) */
299			check(2,"s");
300	greg	2.13	set_eparams(prms = argv[++i]);
301	greg	2.12	break;
302	greg	2.1	case 'b': /* bin expression/count */
303			if (argv[i][2] == 'n') {
304			check(3,"s");
305			bincnt = (int)(eval(argv[++i]) + .5);
306			break;
307			}
308			check(2,"s");
309			binval = argv[++i];
310			break;
311			case 'm': /* modifier name */
312			check(2,"s");
313	greg	2.12	addmodifier(argv[++i], curout, prms, binval, bincnt);
314	greg	2.1	break;
315			case 'M': /* modifier file */
316			check(2,"s");
317	greg	2.12	addmodfile(argv[++i], curout, prms, binval, bincnt);
318	greg	2.1	break;
319	greg	2.19	case 't': /* reporting interval */
320			check(2,"i");
321			report_intvl = atoi(argv[++i]);
322			break;
323	greg	2.1	default:
324			goto badopt;
325			}
326			}
327	greg	2.11	if (nmods <= 0)
328			error(USER, "missing required modifier argument");
329	greg	2.1	/* override some option settings */
330			override_options();
331			/* initialize object types */
332			initotypes();
333			/* initialize urand */
334			if (rand_samp) {
335			srandom((long)time(0));
336			initurand(0);
337			} else {
338			srandom(0L);
339			initurand(2048);
340			}
341			/* set up signal handling */
342			sigdie(SIGINT, "Interrupt");
343			#ifdef SIGHUP
344			sigdie(SIGHUP, "Hangup");
345			#endif
346			sigdie(SIGTERM, "Terminate");
347			#ifdef SIGPIPE
348			sigdie(SIGPIPE, "Broken pipe");
349			#endif
350			#ifdef SIGALRM
351			sigdie(SIGALRM, "Alarm clock");
352			#endif
353			#ifdef SIGXCPU
354			sigdie(SIGXCPU, "CPU limit exceeded");
355			sigdie(SIGXFSZ, "File size exceeded");
356			#endif
357			#ifdef NICE
358			nice(NICE); /* lower priority */
359			#endif
360			/* get octree */
361			if (i == argc)
362			octname = NULL;
363			else if (i == argc-1)
364			octname = argv[i];
365			else
366			goto badopt;
367			if (octname == NULL)
368			error(USER, "missing octree argument");
369
370			readoct(octname, ~(IO_FILES\|IO_INFO), &thescene, NULL);
371			nsceneobjs = nobjects;
372
373	greg	2.14	/* PMAP: set up & load photon maps */
374			ray_init_pmap();
375
376	greg	2.1	marksources(); /* find and mark sources */
377	greg	2.14
378			/* PMAP: init photon map for light source contributions */
379			initPmapContrib(&modconttab, nmods);
380	greg	2.1
381			setambient(); /* initialize ambient calculation */
382	greg	2.14
383	greg	2.2	rcontrib(); /* trace ray contributions (loop) */
384	greg	2.1
385			ambsync(); /* flush ambient file */
386
387	greg	2.14	/* PMAP: free photon maps */
388			ray_done_pmap();
389
390	greg	2.1	quit(0); /* exit clean */
391
392			badopt:
393			fprintf(stderr,
394	greg	2.16	"Usage: %s [-n nprocs][-V][-c count][-r][-e expr][-f source][-o ospec][-p p1=V1,p2=V2][-b binv][-bn N] {-m mod \| -M file} [rtrace options] octree\n",
395	greg	2.1	progname);
396			sprintf(errmsg, "command line error at '%s'", argv[i]);
397			error(USER, errmsg);
398			return(1); /* pro forma return */
399
400			#undef check
401	schorsch	2.15	#undef check_bool
402	greg	2.1	}
403
404
405			void
406			wputs( /* warning output function */
407	greg	2.27	const char *s
408	greg	2.1	)
409			{
410			int lasterrno = errno;
411			eputs(s);
412			errno = lasterrno;
413			}
414
415
416			void
417			eputs( /* put string to stderr */
418	greg	2.27	const char *s
419	greg	2.1	)
420			{
421			static int midline = 0;
422
423			if (!*s)
424			return;
425			if (!midline++) {
426			fputs(progname, stderr);
427			fputs(": ", stderr);
428			}
429			fputs(s, stderr);
430			if (s[strlen(s)-1] == '\n') {
431			fflush(stderr);
432			midline = 0;
433			}
434			}