src/rt/rcmain.c

#ifndef lint
static const char       RCSid[] = "$Id: rcmain.c,v 2.21 2022/03/30 16:00:56 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\nRAWrecovery\n" \
                                "ValueContribution\nImmediateIrradiance\n" \
                                "ProgressReporting\nDistanceLimiting\n"
#else
#define RCONTRIB_FEATURES       "Multiprocessing\n" \
                                "Accumulation\nSummation\nRAWrecovery\n" \
                                "ValueContribution\nImmediateIrradiance\n" \
                                "ProgressReporting\nDistanceLimiting\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 (!strcmp(argv[1], "-features"))
                return feature_status(argc-2, argv+2);
#if defined(_WIN32) || defined(_WIN64)
        _setmaxstdio(2048);             /* increase file limit to maximum */
#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 */
        char    *s
)
{
        int  lasterrno = errno;
        eputs(s);
        errno = lasterrno;
}


void
eputs(                          /* put string to stderr */
        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:	2.22
Committed:	Wed Oct 19 21:25:20 2022 UTC (18 months, 4 weeks ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.21:	+15 -1 lines
Log Message:	feat(rpict,rtrace,rcontrib): Added -features option to check for method support
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.22	static const char RCSid[] = "$Id: rcmain.c,v 2.21 2022/03/30 16:00:56 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			#define RCONTRIB_FEATURES "Accumulation\nSummation\nRAWrecovery\n" \
58			"ValueContribution\nImmediateIrradiance\n" \
59			"ProgressReporting\nDistanceLimiting\n"
60			#else
61			#define RCONTRIB_FEATURES "Multiprocessing\n" \
62			"Accumulation\nSummation\nRAWrecovery\n" \
63			"ValueContribution\nImmediateIrradiance\n" \
64			"ProgressReporting\nDistanceLimiting\n"
65			#endif
66	greg	2.1
67			static void
68			printdefaults(void) /* print default values to stdout */
69			{
70	greg	2.3	printf("-c %-5d\t\t\t# accumulated rays per record\n", accumulate);
71			printf("-V%c\t\t\t\t# output %s\n", contrib ? '+' : '-',
72			contrib ? "contributions" : "coefficients");
73	greg	2.1	if (imm_irrad)
74			printf("-I+\t\t\t\t# immediate irradiance on\n");
75			printf("-n %-2d\t\t\t\t# number of rendering processes\n", nproc);
76			printf("-x %-9d\t\t\t# %s\n", xres,
77			yres && xres ? "x resolution" : "flush interval");
78			printf("-y %-9d\t\t\t# y resolution\n", yres);
79			printf(lim_dist ? "-ld+\t\t\t\t# limit distance on\n" :
80			"-ld-\t\t\t\t# limit distance off\n");
81			printf("-h%c\t\t\t\t# %s header\n", header ? '+' : '-',
82			header ? "output" : "no");
83			printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
84			inpfmt, outfmt, formstr(inpfmt), formstr(outfmt));
85			printf(erract[WARNING].pf != NULL ?
86			"-w+\t\t\t\t# warning messages on\n" :
87			"-w-\t\t\t\t# warning messages off\n");
88			print_rdefaults();
89			}
90
91
92			static void
93			onsig( /* fatal signal */
94			int signo
95			)
96			{
97			static int gotsig = 0;
98
99			if (gotsig++) /* two signals and we're gone! */
100			_exit(signo);
101
102			#ifdef SIGALRM
103			alarm(15); /* allow 15 seconds to clean up */
104			signal(SIGALRM, SIG_DFL); /* make certain we do die */
105			#endif
106			eputs("signal - ");
107			eputs(sigerr[signo]);
108			eputs("\n");
109			quit(3);
110			}
111
112
113			static void
114			sigdie( /* set fatal signal */
115			int signo,
116			char *msg
117			)
118			{
119			if (signal(signo, onsig) == SIG_IGN)
120			signal(signo, SIG_IGN);
121			sigerr[signo] = msg;
122			}
123
124
125			/* set input/output format */
126			static void
127			setformat(const char *fmt)
128			{
129			switch (fmt[0]) {
130			case 'f':
131			case 'd':
132			SET_FILE_BINARY(stdin);
133			/* fall through */
134			case 'a':
135			inpfmt = fmt[0];
136			break;
137			default:
138			goto fmterr;
139			}
140			switch (fmt[1]) {
141			case '\0':
142			outfmt = inpfmt;
143			return;
144			case 'a':
145			case 'f':
146			case 'd':
147			case 'c':
148			outfmt = fmt[1];
149			break;
150			default:
151			goto fmterr;
152			}
153			if (!fmt[2])
154			return;
155			fmterr:
156			sprintf(errmsg, "Illegal i/o format: -f%s", fmt);
157			error(USER, errmsg);
158			}
159
160
161			/* Set overriding options */
162			static void
163			override_options(void)
164			{
165			shadthresh = 0;
166			ambssamp = 0;
167			ambacc = 0;
168			if (accumulate <= 0) /* no output flushing for single record */
169			xres = yres = 0;
170			}
171
172
173			int
174			main(int argc, char *argv[])
175			{
176			#define check(ol,al) if (argv[i][ol] \|\| \
177			badarg(argc-i-1,argv+i+1,al)) \
178			goto badopt
179	schorsch	2.15	#define check_bool(olen,var) switch (argv[i][olen]) { \
180	greg	2.1	case '\0': var = !var; break; \
181			case 'y': case 'Y': case 't': case 'T': \
182			case '+': case '1': var = 1; break; \
183			case 'n': case 'N': case 'f': case 'F': \
184			case '-': case '0': var = 0; break; \
185			default: goto badopt; }
186			char *curout = NULL;
187	greg	2.12	char *prms = NULL;
188	greg	2.1	char *binval = NULL;
189			int bincnt = 0;
190			int rval;
191			int i;
192			/* global program name */
193			progname = argv[0] = fixargv0(argv[0]);
194			gargv = argv;
195			gargc = argc;
196	greg	2.22	/* feature check only? */
197			strcat(RFeatureList, RCONTRIB_FEATURES);
198			if (!strcmp(argv[1], "-features"))
199			return feature_status(argc-2, argv+2);
200	greg	2.17	#if defined(_WIN32) \|\| defined(_WIN64)
201			_setmaxstdio(2048); /* increase file limit to maximum */
202			#endif
203	greg	2.1	/* initialize calcomp routines early */
204			initfunc();
205	greg	2.21	calcontext(RCCONTEXT);
206	greg	2.1	/* option city */
207			for (i = 1; i < argc; i++) {
208			/* expand arguments */
209			while ((rval = expandarg(&argc, &argv, i)) > 0)
210			;
211			if (rval < 0) {
212			sprintf(errmsg, "cannot expand '%s'", argv[i]);
213			error(SYSTEM, errmsg);
214			}
215			if (argv[i] == NULL \|\| argv[i][0] != '-')
216			break; /* break from options */
217			if (!strcmp(argv[i], "-version")) {
218			puts(VersionID);
219			quit(0);
220			}
221			if (!strcmp(argv[i], "-defaults") \|\|
222			!strcmp(argv[i], "-help")) {
223			override_options();
224			printdefaults();
225			quit(0);
226			}
227			rval = getrenderopt(argc-i, argv+i);
228			if (rval >= 0) {
229			i += rval;
230			continue;
231			}
232			switch (argv[i][1]) {
233			case 'n': /* number of cores */
234			check(2,"i");
235			nproc = atoi(argv[++i]);
236			if (nproc <= 0)
237			error(USER, "bad number of processes");
238			break;
239			case 'V': /* output contributions */
240	schorsch	2.15	check_bool(2,contrib);
241	greg	2.1	break;
242			case 'x': /* x resolution */
243			check(2,"i");
244			xres = atoi(argv[++i]);
245			break;
246			case 'y': /* y resolution */
247			check(2,"i");
248			yres = atoi(argv[++i]);
249			break;
250			case 'w': /* warnings */
251	greg	2.2	rval = (erract[WARNING].pf != NULL);
252	schorsch	2.15	check_bool(2,rval);
253	greg	2.1	if (rval) erract[WARNING].pf = wputs;
254			else erract[WARNING].pf = NULL;
255			break;
256			case 'e': /* expression */
257			check(2,"s");
258			scompile(argv[++i], NULL, 0);
259			break;
260			case 'l': /* limit distance */
261			if (argv[i][2] != 'd')
262			goto badopt;
263	schorsch	2.15	check_bool(3,lim_dist);
264	greg	2.1	break;
265			case 'I': /* immed. irradiance */
266	schorsch	2.15	check_bool(2,imm_irrad);
267	greg	2.1	break;
268			case 'f': /* file or force or format */
269			if (!argv[i][2]) {
270			check(2,"s");
271			loadfunc(argv[++i]);
272			break;
273			}
274			if (argv[i][2] == 'o') {
275	schorsch	2.15	check_bool(3,force_open);
276	greg	2.1	break;
277			}
278			setformat(argv[i]+2);
279			break;
280			case 'o': /* output */
281			check(2,"s");
282			curout = argv[++i];
283			break;
284			case 'c': /* input rays per output */
285			check(2,"i");
286			accumulate = atoi(argv[++i]);
287			break;
288			case 'r': /* recover output */
289	schorsch	2.15	check_bool(2,recover);
290	greg	2.1	break;
291			case 'h': /* header output */
292	schorsch	2.15	check_bool(2,header);
293	greg	2.1	break;
294	greg	2.12	case 'p': /* parameter setting(s) */
295			check(2,"s");
296	greg	2.13	set_eparams(prms = argv[++i]);
297	greg	2.12	break;
298	greg	2.1	case 'b': /* bin expression/count */
299			if (argv[i][2] == 'n') {
300			check(3,"s");
301			bincnt = (int)(eval(argv[++i]) + .5);
302			break;
303			}
304			check(2,"s");
305			binval = argv[++i];
306			break;
307			case 'm': /* modifier name */
308			check(2,"s");
309	greg	2.12	addmodifier(argv[++i], curout, prms, binval, bincnt);
310	greg	2.1	break;
311			case 'M': /* modifier file */
312			check(2,"s");
313	greg	2.12	addmodfile(argv[++i], curout, prms, binval, bincnt);
314	greg	2.1	break;
315	greg	2.19	case 't': /* reporting interval */
316			check(2,"i");
317			report_intvl = atoi(argv[++i]);
318			break;
319	greg	2.1	default:
320			goto badopt;
321			}
322			}
323	greg	2.11	if (nmods <= 0)
324			error(USER, "missing required modifier argument");
325	greg	2.1	/* override some option settings */
326			override_options();
327			/* initialize object types */
328			initotypes();
329			/* initialize urand */
330			if (rand_samp) {
331			srandom((long)time(0));
332			initurand(0);
333			} else {
334			srandom(0L);
335			initurand(2048);
336			}
337			/* set up signal handling */
338			sigdie(SIGINT, "Interrupt");
339			#ifdef SIGHUP
340			sigdie(SIGHUP, "Hangup");
341			#endif
342			sigdie(SIGTERM, "Terminate");
343			#ifdef SIGPIPE
344			sigdie(SIGPIPE, "Broken pipe");
345			#endif
346			#ifdef SIGALRM
347			sigdie(SIGALRM, "Alarm clock");
348			#endif
349			#ifdef SIGXCPU
350			sigdie(SIGXCPU, "CPU limit exceeded");
351			sigdie(SIGXFSZ, "File size exceeded");
352			#endif
353			#ifdef NICE
354			nice(NICE); /* lower priority */
355			#endif
356			/* get octree */
357			if (i == argc)
358			octname = NULL;
359			else if (i == argc-1)
360			octname = argv[i];
361			else
362			goto badopt;
363			if (octname == NULL)
364			error(USER, "missing octree argument");
365
366			readoct(octname, ~(IO_FILES\|IO_INFO), &thescene, NULL);
367			nsceneobjs = nobjects;
368
369	greg	2.14	/* PMAP: set up & load photon maps */
370			ray_init_pmap();
371
372	greg	2.1	marksources(); /* find and mark sources */
373	greg	2.14
374			/* PMAP: init photon map for light source contributions */
375			initPmapContrib(&modconttab, nmods);
376	greg	2.1
377			setambient(); /* initialize ambient calculation */
378	greg	2.14
379	greg	2.2	rcontrib(); /* trace ray contributions (loop) */
380	greg	2.1
381			ambsync(); /* flush ambient file */
382
383	greg	2.14	/* PMAP: free photon maps */
384			ray_done_pmap();
385
386	greg	2.1	quit(0); /* exit clean */
387
388			badopt:
389			fprintf(stderr,
390	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",
391	greg	2.1	progname);
392			sprintf(errmsg, "command line error at '%s'", argv[i]);
393			error(USER, errmsg);
394			return(1); /* pro forma return */
395
396			#undef check
397	schorsch	2.15	#undef check_bool
398	greg	2.1	}
399
400
401			void
402			wputs( /* warning output function */
403			char *s
404			)
405			{
406			int lasterrno = errno;
407			eputs(s);
408			errno = lasterrno;
409			}
410
411
412			void
413			eputs( /* put string to stderr */
414			char *s
415			)
416			{
417			static int midline = 0;
418
419			if (!*s)
420			return;
421			if (!midline++) {
422			fputs(progname, stderr);
423			fputs(": ", stderr);
424			}
425			fputs(s, stderr);
426			if (s[strlen(s)-1] == '\n') {
427			fflush(stderr);
428			midline = 0;
429			}
430			}