src/rt/rtmain.c

#ifndef lint
static const char       RCSid[] = "$Id: rtmain.c,v 2.38 2022/10/19 21:25:20 greg Exp $";
#endif
/*
 *  rtmain.c - main for rtrace per-ray calculation program
 */

#include "copyright.h"

#include  <signal.h>

#include  "platform.h"
#include  "rtprocess.h" /* getpid() */
#include  "resolu.h"
#include  "ray.h"
#include  "source.h"
#include  "ambient.h"
#include  "random.h"
#include  "paths.h"
#include  "pmapray.h"

extern char     *progname;              /* global argv[0] */

extern char     *shm_boundary;          /* boundary of shared memory */

                                        /* persistent processes define */
#ifdef  F_SETLKW
#define  PERSIST        1               /* normal persist */
#define  PARALLEL       2               /* parallel persist */
#define  PCHILD         3               /* child of normal persist */
#endif

char  *sigerr[NSIG];                    /* signal error messages */
char  *errfile = NULL;                  /* error output file */

int  nproc = 1;                         /* number of processes */

extern char  *formstr(int f);           /* string from format */
extern int  setrtoutput(void);          /* set output values */

int  inform = 'a';                      /* input format */
int  outform = 'a';                     /* output format */
char  *outvals = "v";                   /* output specification */

int  hresolu = 0;                       /* horizontal (scan) size */
int  vresolu = 0;                       /* vertical resolution */

extern int  castonly;                   /* only doing ray-casting? */

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

#ifndef MAXMODLIST
#define MAXMODLIST      1024            /* maximum modifiers we'll track */
#endif

extern void  (*addobjnotify[])();       /* object notification calls */
extern void  tranotify(OBJECT obj);

char  *tralist[MAXMODLIST];             /* list of modifers to trace (or no) */
int  traincl = -1;                      /* include == 1, exclude == 0 */

static int  loadflags = ~IO_FILES;      /* what to load from octree */

static void onsig(int  signo);
static void sigdie(int  signo, char  *msg);
static void printdefaults(void);

#ifdef PERSIST
#define RTRACE_FEATURES "Persist\nParallelPersist\nMultiProcessing\n" \
                        "IrradianceCalc\nImmediateIrradiance\nDistanceLimiting\n" \
                        "HessianAmbientCache\nAmbientAveraging\n" \
                        "AmbientValueSharing\nAdaptiveShadowTesting\n"
#else
#define RTRACE_FEATURES "IrradianceCalc\nIrradianceCalc\nDistanceLimiting\n" \
                        "HessianAmbientCache\nAmbientAveraging\n" \
                        "AmbientValueSharing\nAdaptiveShadowTesting\n"
#endif


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; }
        extern char  *octname;
        int  persist = 0;
        char  *octnm = NULL;
        char  **tralp = NULL;
        int  duped1 = -1;
        int  rval;
        int  i;
                                        /* global program name */
        progname = argv[0] = fixargv0(argv[0]);
                                        /* feature check only? */
        strcat(RFeatureList, RTRACE_FEATURES);
        if (!strcmp(argv[1], "-features"))
                return feature_status(argc-2, argv+2);
                                        /* add trace notify function */
        for (i = 0; addobjnotify[i] != NULL; i++)
                ;
        addobjnotify[i] = tranotify;
                                        /* 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")) {
                        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 'x':                               /* x resolution */
                        check(2,"i");
                        hresolu = atoi(argv[++i]);
                        break;
                case 'y':                               /* y resolution */
                        check(2,"i");
                        vresolu = 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':                               /* error file */
                        check(2,"s");
                        errfile = argv[++i];
                        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':                               /* format i/o */
                        switch (argv[i][2]) {
                        case 'a':                               /* ascii */
                        case 'f':                               /* float */
                        case 'd':                               /* double */
                                inform = argv[i][2];
                                break;
                        default:
                                goto badopt;
                        }
                        switch (argv[i][3]) {
                        case '\0':
                                outform = inform;
                                break;
                        case 'a':                               /* ascii */
                        case 'f':                               /* float */
                        case 'd':                               /* double */
                        case 'c':                               /* color */
                                check(4,"");
                                outform = argv[i][3];
                                break;
                        default:
                                goto badopt;
                        }
                        break;
                case 'o':                               /* output */
                        outvals = argv[i]+2;
                        break;
                case 'h':                               /* header output */
                        rval = loadflags & IO_INFO;
                        check_bool(2,rval);
                        loadflags = rval ? loadflags | IO_INFO :
                                        loadflags & ~IO_INFO;
                        break;
                case 't':                               /* trace */
                        switch (argv[i][2]) {
                        case 'i':                               /* include */
                        case 'I':
                                check(3,"s");
                                if (traincl != 1) {
                                        traincl = 1;
                                        tralp = tralist;
                                }
                                if (argv[i][2] == 'I') {        /* file */
                                        rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
                                        getpath(argv[++i],getrlibpath(),R_OK));
                                        if (rval < 0) {
                                                sprintf(errmsg,
                                "cannot open trace include file \"%s\"",
                                                                argv[i]);
                                                error(SYSTEM, errmsg);
                                        }
                                        tralp += rval;
                                } else {
                                        *tralp++ = argv[++i];
                                        *tralp = NULL;
                                }
                                break;
                        case 'e':                               /* exclude */
                        case 'E':
                                check(3,"s");
                                if (traincl != 0) {
                                        traincl = 0;
                                        tralp = tralist;
                                }
                                if (argv[i][2] == 'E') {        /* file */
                                        rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
                                        getpath(argv[++i],getrlibpath(),R_OK));
                                        if (rval < 0) {
                                                sprintf(errmsg,
                                "cannot open trace exclude file \"%s\"",
                                                                argv[i]);
                                                error(SYSTEM, errmsg);
                                        }
                                        tralp += rval;
                                } else {
                                        *tralp++ = argv[++i];
                                        *tralp = NULL;
                                }
                                break;
                        default:
                                goto badopt;
                        }
                        break;
#ifdef  PERSIST
                case 'P':                               /* persist file */
                        if (argv[i][2] == 'P') {
                                check(3,"s");
                                persist = PARALLEL;
                        } else {
                                check(2,"s");
                                persist = PERSIST;
                        }
                        persistfile(argv[++i]);
                        break;
#endif
                default:
                        goto badopt;
                }
        }
        if (nproc > 1 && persist)
                error(USER, "multiprocessing incompatible with persist file");
                                        /* 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
                                        /* open error file */
        if (errfile != NULL) {
                if (freopen(errfile, "a", stderr) == NULL)
                        quit(2);
                fprintf(stderr, "**************\n*** PID %5d: ",
                                getpid());
                printargs(argc, argv, stderr);
                putc('\n', stderr);
                fflush(stderr);
        }
#ifdef  NICE
        nice(NICE);                     /* lower priority */
#endif
                                        /* get octree */
        if (i == argc)
                octnm = NULL;
        else if (i == argc-1)
                octnm = argv[i];
        else
                goto badopt;
        if (octnm == NULL)
                error(USER, "missing octree argument");
                                        /* set up output */
#ifdef  PERSIST
        if (persist) {
                duped1 = dup(fileno(stdout));   /* don't lose our output */
                openheader();
        }
#endif
        if (outform != 'a')
                SET_FILE_BINARY(stdout);
        rval = setrtoutput();
        readoct(octname = octnm, loadflags, &thescene, NULL);
        nsceneobjs = nobjects;

        if (loadflags & IO_INFO) {      /* print header */
                printargs(i, argv, stdout);
                printf("SOFTWARE= %s\n", VersionID);
                fputnow(stdout);
                if (rval > 0)           /* saved from setrtoutput() call */
                        printf("NCOMP=%d\n", rval);
                if ((outform == 'f') | (outform == 'd'))
                        fputendian(stdout);
                fputformat(formstr(outform), stdout);
                putchar('\n');
        }

        if (!castonly) {        /* any actual ray traversal to do? */

                ray_init_pmap();        /* PMAP: set up & load photon maps */
                
                marksources();          /* find and mark sources */

                setambient();           /* initialize ambient calculation */
        } else
                distantsources();       /* else mark only distant sources */

        fflush(stdout);                 /* in case we're duplicating header */

#ifdef  PERSIST
        if (persist) {
                                                /* reconnect stdout */
                dup2(duped1, fileno(stdout));
                close(duped1);
                if (persist == PARALLEL) {      /* multiprocessing */
                        preload_objs();         /* preload scene */
                        shm_boundary = (char *)malloc(16);
                        strcpy(shm_boundary, "SHM_BOUNDARY");
                        while ((rval=fork()) == 0) {    /* keep on forkin' */
                                pflock(1);
                                pfhold();
                                ambsync();              /* load new values */
                        }
                        if (rval < 0)
                                error(SYSTEM, "cannot fork child for persist function");
                        pfdetach();             /* parent will run then exit */
                }
        }
runagain:
        if (persist)
                dupheader();                    /* send header to stdout */
#endif
                                        /* trace rays */
        rtrace(NULL, nproc);
                                        /* flush ambient file */
        ambsync();
#ifdef  PERSIST
        if (persist == PERSIST) {       /* first run-through */
                if ((rval=fork()) == 0) {       /* child loops until killed */
                        pflock(1);
                        persist = PCHILD;
                } else {                        /* original process exits */
                        if (rval < 0)
                                error(SYSTEM, "cannot fork child for persist function");
                        pfdetach();             /* parent exits */
                }
        }
        if (persist == PCHILD) {        /* wait for a signal then go again */
                pfhold();
                raynum = nrays = 0;             /* reinitialize */
                goto runagain;
        }
#endif

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

badopt:
        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;
        }
}


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;
}


static void
printdefaults(void)                     /* print default values to stdout */
{
        char  *cp;

        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", hresolu,
                        vresolu && hresolu ? "x resolution" : "flush interval");
        printf("-y %-9d\t\t\t# y resolution\n", vresolu);
        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", loadflags & IO_INFO ? '+' : '-',
                        loadflags & IO_INFO ? "output" : "no");
        printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
                        inform, outform, formstr(inform), formstr(outform));
        printf("-o%-9s\t\t\t# output", outvals);
        for (cp = outvals; *cp; cp++)
                switch (*cp) {
                case 't': case 'T': printf(" trace"); break;
                case 'o': printf(" origin"); break;
                case 'd': printf(" direction"); break;
                case 'r': printf(" reflect_contrib"); break;
                case 'R': printf(" reflect_length"); break;
                case 'x': printf(" unreflect_contrib"); break;
                case 'X': printf(" unreflect_length"); break;
                case 'v': printf(" value"); break;
                case 'V': printf(" contribution"); break;
                case 'l': printf(" length"); break;
                case 'L': printf(" first_length"); break;
                case 'p': printf(" point"); break;
                case 'n': printf(" normal"); break;
                case 'N': printf(" unperturbed_normal"); break;
                case 's': printf(" surface"); break;
                case 'w': printf(" weight"); break;
                case 'W': printf(" coefficient"); break;
                case 'm': printf(" modifier"); break;
                case 'M': printf(" material"); break;
                case '~': printf(" tilde"); break;
                }
        putchar('\n');
        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();
}
Revision:	2.39
Committed:	Wed Oct 19 23:10:34 2022 UTC (18 months, 3 weeks ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.38:	+5 -3 lines
Log Message:	fix(rcontrib): removed AdaptiveShadowTesting from feature list (didn't belong)
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.39	static const char RCSid[] = "$Id: rtmain.c,v 2.38 2022/10/19 21:25:20 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* rtmain.c - main for rtrace per-ray calculation program
6			*/
7
8	greg	2.2	#include "copyright.h"
9	greg	2.1
10	schorsch	2.4	#include <signal.h>
11
12			#include "platform.h"
13	schorsch	2.7	#include "rtprocess.h" /* getpid() */
14	schorsch	2.9	#include "resolu.h"
15	greg	2.1	#include "ray.h"
16			#include "source.h"
17			#include "ambient.h"
18			#include "random.h"
19			#include "paths.h"
20	greg	2.23	#include "pmapray.h"
21	greg	2.1
22	greg	2.18	extern char progname; / global argv[0] */
23
24			extern char shm_boundary; / boundary of shared memory */
25
26	greg	2.1	/* persistent processes define */
27			#ifdef F_SETLKW
28			#define PERSIST 1 /* normal persist */
29			#define PARALLEL 2 /* parallel persist */
30			#define PCHILD 3 /* child of normal persist */
31			#endif
32
33			char sigerr[NSIG]; / signal error messages */
34			char errfile = NULL; / error output file */
35
36	greg	2.18	int nproc = 1; /* number of processes */
37
38	greg	2.31	extern char formstr(int f); / string from format */
39			extern int setrtoutput(void); /* set output values */
40	greg	2.32
41	greg	2.18	int inform = 'a'; /* input format */
42			int outform = 'a'; /* output format */
43			char outvals = "v"; / output specification */
44	greg	2.1
45	greg	2.18	int hresolu = 0; /* horizontal (scan) size */
46			int vresolu = 0; /* vertical resolution */
47	greg	2.1
48	greg	2.33	extern int castonly; /* only doing ray-casting? */
49	greg	2.32
50	greg	2.18	int imm_irrad = 0; /* compute immediate irradiance? */
51			int lim_dist = 0; /* limit distance? */
52
53			#ifndef MAXMODLIST
54			#define MAXMODLIST 1024 /* maximum modifiers we'll track */
55			#endif
56	greg	2.1
57	greg	2.18	extern void (addobjnotify[])(); / object notification calls */
58			extern void tranotify(OBJECT obj);
59
60			char tralist[MAXMODLIST]; / list of modifers to trace (or no) */
61			int traincl = -1; /* include == 1, exclude == 0 */
62	greg	2.1
63	greg	2.10	static int loadflags = ~IO_FILES; /* what to load from octree */
64
65	schorsch	2.9	static void onsig(int signo);
66			static void sigdie(int signo, char *msg);
67			static void printdefaults(void);
68	greg	2.1
69	greg	2.38	#ifdef PERSIST
70			#define RTRACE_FEATURES "Persist\nParallelPersist\nMultiProcessing\n" \
71			"IrradianceCalc\nImmediateIrradiance\nDistanceLimiting\n" \
72	greg	2.39	"HessianAmbientCache\nAmbientAveraging\n" \
73			"AmbientValueSharing\nAdaptiveShadowTesting\n"
74	greg	2.38	#else
75			#define RTRACE_FEATURES "IrradianceCalc\nIrradianceCalc\nDistanceLimiting\n" \
76	greg	2.39	"HessianAmbientCache\nAmbientAveraging\n" \
77			"AmbientValueSharing\nAdaptiveShadowTesting\n"
78	greg	2.38	#endif
79
80	greg	2.1
81			int
82	schorsch	2.9	main(int argc, char *argv[])
83	greg	2.1	{
84			#define check(ol,al) if (argv[i][ol] \|\| \
85			badarg(argc-i-1,argv+i+1,al)) \
86			goto badopt
87	schorsch	2.26	#define check_bool(olen,var) switch (argv[i][olen]) { \
88	greg	2.1	case '\0': var = !var; break; \
89			case 'y': case 'Y': case 't': case 'T': \
90			case '+': case '1': var = 1; break; \
91			case 'n': case 'N': case 'f': case 'F': \
92			case '-': case '0': var = 0; break; \
93			default: goto badopt; }
94	greg	2.25	extern char *octname;
95	greg	2.1	int persist = 0;
96	greg	2.18	char *octnm = NULL;
97	greg	2.22	char **tralp = NULL;
98			int duped1 = -1;
99	greg	2.1	int rval;
100			int i;
101			/* global program name */
102			progname = argv[0] = fixargv0(argv[0]);
103	greg	2.38	/* feature check only? */
104			strcat(RFeatureList, RTRACE_FEATURES);
105			if (!strcmp(argv[1], "-features"))
106			return feature_status(argc-2, argv+2);
107	greg	2.18	/* add trace notify function */
108			for (i = 0; addobjnotify[i] != NULL; i++)
109			;
110			addobjnotify[i] = tranotify;
111	greg	2.1	/* option city */
112			for (i = 1; i < argc; i++) {
113			/* expand arguments */
114			while ((rval = expandarg(&argc, &argv, i)) > 0)
115			;
116			if (rval < 0) {
117			sprintf(errmsg, "cannot expand '%s'", argv[i]);
118			error(SYSTEM, errmsg);
119			}
120			if (argv[i] == NULL \|\| argv[i][0] != '-')
121			break; /* break from options */
122			if (!strcmp(argv[i], "-version")) {
123			puts(VersionID);
124			quit(0);
125			}
126			if (!strcmp(argv[i], "-defaults") \|\|
127			!strcmp(argv[i], "-help")) {
128			printdefaults();
129			quit(0);
130			}
131			rval = getrenderopt(argc-i, argv+i);
132			if (rval >= 0) {
133			i += rval;
134			continue;
135			}
136			switch (argv[i][1]) {
137	greg	2.18	case 'n': /* number of cores */
138			check(2,"i");
139			nproc = atoi(argv[++i]);
140			if (nproc <= 0)
141			error(USER, "bad number of processes");
142			break;
143	greg	2.1	case 'x': /* x resolution */
144			check(2,"i");
145			hresolu = atoi(argv[++i]);
146			break;
147			case 'y': /* y resolution */
148			check(2,"i");
149			vresolu = atoi(argv[++i]);
150			break;
151			case 'w': /* warnings */
152			rval = erract[WARNING].pf != NULL;
153	schorsch	2.26	check_bool(2,rval);
154	greg	2.1	if (rval) erract[WARNING].pf = wputs;
155			else erract[WARNING].pf = NULL;
156			break;
157			case 'e': /* error file */
158			check(2,"s");
159			errfile = argv[++i];
160			break;
161			case 'l': /* limit distance */
162			if (argv[i][2] != 'd')
163			goto badopt;
164	schorsch	2.26	check_bool(3,lim_dist);
165	greg	2.1	break;
166			case 'I': /* immed. irradiance */
167	schorsch	2.26	check_bool(2,imm_irrad);
168	greg	2.1	break;
169			case 'f': /* format i/o */
170			switch (argv[i][2]) {
171			case 'a': /* ascii */
172			case 'f': /* float */
173			case 'd': /* double */
174			inform = argv[i][2];
175			break;
176			default:
177			goto badopt;
178			}
179			switch (argv[i][3]) {
180			case '\0':
181			outform = inform;
182			break;
183			case 'a': /* ascii */
184			case 'f': /* float */
185			case 'd': /* double */
186			case 'c': /* color */
187			check(4,"");
188			outform = argv[i][3];
189			break;
190			default:
191			goto badopt;
192			}
193			break;
194			case 'o': /* output */
195			outvals = argv[i]+2;
196			break;
197			case 'h': /* header output */
198			rval = loadflags & IO_INFO;
199	schorsch	2.26	check_bool(2,rval);
200	greg	2.1	loadflags = rval ? loadflags \| IO_INFO :
201			loadflags & ~IO_INFO;
202			break;
203			case 't': /* trace */
204			switch (argv[i][2]) {
205			case 'i': /* include */
206			case 'I':
207			check(3,"s");
208			if (traincl != 1) {
209			traincl = 1;
210			tralp = tralist;
211			}
212			if (argv[i][2] == 'I') { /* file */
213	greg	2.27	rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
214	greg	2.3	getpath(argv[++i],getrlibpath(),R_OK));
215	greg	2.1	if (rval < 0) {
216			sprintf(errmsg,
217			"cannot open trace include file \"%s\"",
218			argv[i]);
219			error(SYSTEM, errmsg);
220			}
221			tralp += rval;
222			} else {
223			*tralp++ = argv[++i];
224			*tralp = NULL;
225			}
226			break;
227			case 'e': /* exclude */
228			case 'E':
229			check(3,"s");
230			if (traincl != 0) {
231			traincl = 0;
232			tralp = tralist;
233			}
234			if (argv[i][2] == 'E') { /* file */
235	greg	2.27	rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
236	greg	2.3	getpath(argv[++i],getrlibpath(),R_OK));
237	greg	2.1	if (rval < 0) {
238			sprintf(errmsg,
239			"cannot open trace exclude file \"%s\"",
240			argv[i]);
241			error(SYSTEM, errmsg);
242			}
243			tralp += rval;
244			} else {
245			*tralp++ = argv[++i];
246			*tralp = NULL;
247			}
248			break;
249			default:
250			goto badopt;
251			}
252			break;
253			#ifdef PERSIST
254			case 'P': /* persist file */
255			if (argv[i][2] == 'P') {
256			check(3,"s");
257			persist = PARALLEL;
258			} else {
259			check(2,"s");
260			persist = PERSIST;
261			}
262			persistfile(argv[++i]);
263			break;
264			#endif
265			default:
266			goto badopt;
267			}
268			}
269	greg	2.34	if (nproc > 1 && persist)
270			error(USER, "multiprocessing incompatible with persist file");
271	greg	2.1	/* initialize object types */
272			initotypes();
273			/* initialize urand */
274	greg	2.14	if (rand_samp) {
275			srandom((long)time(0));
276			initurand(0);
277			} else {
278			srandom(0L);
279			initurand(2048);
280			}
281	greg	2.1	/* set up signal handling */
282			sigdie(SIGINT, "Interrupt");
283	schorsch	2.5	#ifdef SIGHUP
284	greg	2.1	sigdie(SIGHUP, "Hangup");
285	schorsch	2.5	#endif
286	greg	2.1	sigdie(SIGTERM, "Terminate");
287	schorsch	2.5	#ifdef SIGPIPE
288	greg	2.1	sigdie(SIGPIPE, "Broken pipe");
289	schorsch	2.5	#endif
290			#ifdef SIGALRM
291	greg	2.1	sigdie(SIGALRM, "Alarm clock");
292	schorsch	2.5	#endif
293	greg	2.1	#ifdef SIGXCPU
294			sigdie(SIGXCPU, "CPU limit exceeded");
295			sigdie(SIGXFSZ, "File size exceeded");
296			#endif
297			/* open error file */
298			if (errfile != NULL) {
299			if (freopen(errfile, "a", stderr) == NULL)
300			quit(2);
301			fprintf(stderr, "************\n* PID %5d: ",
302			getpid());
303			printargs(argc, argv, stderr);
304			putc('\n', stderr);
305			fflush(stderr);
306			}
307			#ifdef NICE
308			nice(NICE); /* lower priority */
309			#endif
310			/* get octree */
311			if (i == argc)
312	greg	2.18	octnm = NULL;
313	greg	2.1	else if (i == argc-1)
314	greg	2.18	octnm = argv[i];
315	greg	2.1	else
316			goto badopt;
317	greg	2.18	if (octnm == NULL)
318	greg	2.1	error(USER, "missing octree argument");
319			/* set up output */
320			#ifdef PERSIST
321			if (persist) {
322			duped1 = dup(fileno(stdout)); /* don't lose our output */
323			openheader();
324			}
325			#endif
326			if (outform != 'a')
327	schorsch	2.4	SET_FILE_BINARY(stdout);
328	greg	2.31	rval = setrtoutput();
329	greg	2.24	readoct(octname = octnm, loadflags, &thescene, NULL);
330	greg	2.1	nsceneobjs = nobjects;
331
332			if (loadflags & IO_INFO) { /* print header */
333			printargs(i, argv, stdout);
334			printf("SOFTWARE= %s\n", VersionID);
335			fputnow(stdout);
336	greg	2.31	if (rval > 0) /* saved from setrtoutput() call */
337			printf("NCOMP=%d\n", rval);
338	greg	2.30	if ((outform == 'f') \| (outform == 'd'))
339			fputendian(stdout);
340	greg	2.1	fputformat(formstr(outform), stdout);
341			putchar('\n');
342			}
343
344	greg	2.32	if (!castonly) { /* any actual ray traversal to do? */
345
346			ray_init_pmap(); /* PMAP: set up & load photon maps */
347
348			marksources(); /* find and mark sources */
349
350			setambient(); /* initialize ambient calculation */
351	greg	2.33	} else
352			distantsources(); /* else mark only distant sources */
353	greg	2.35
354	greg	2.36	fflush(stdout); /* in case we're duplicating header */
355	greg	2.35
356	greg	2.1	#ifdef PERSIST
357			if (persist) {
358			/* reconnect stdout */
359			dup2(duped1, fileno(stdout));
360			close(duped1);
361			if (persist == PARALLEL) { /* multiprocessing */
362			preload_objs(); /* preload scene */
363			shm_boundary = (char *)malloc(16);
364			strcpy(shm_boundary, "SHM_BOUNDARY");
365			while ((rval=fork()) == 0) { /* keep on forkin' */
366			pflock(1);
367			pfhold();
368	greg	2.15	ambsync(); /* load new values */
369	greg	2.1	}
370			if (rval < 0)
371			error(SYSTEM, "cannot fork child for persist function");
372	greg	2.15	pfdetach(); /* parent will run then exit */
373	greg	2.1	}
374			}
375			runagain:
376			if (persist)
377			dupheader(); /* send header to stdout */
378			#endif
379			/* trace rays */
380	greg	2.19	rtrace(NULL, nproc);
381	greg	2.1	/* flush ambient file */
382			ambsync();
383			#ifdef PERSIST
384			if (persist == PERSIST) { /* first run-through */
385			if ((rval=fork()) == 0) { /* child loops until killed */
386			pflock(1);
387			persist = PCHILD;
388			} else { /* original process exits */
389			if (rval < 0)
390			error(SYSTEM, "cannot fork child for persist function");
391			pfdetach(); /* parent exits */
392			}
393			}
394			if (persist == PCHILD) { /* wait for a signal then go again */
395			pfhold();
396			raynum = nrays = 0; /* reinitialize */
397			goto runagain;
398			}
399			#endif
400	greg	2.23
401			ray_done_pmap(); /* PMAP: free photon maps */
402
403	greg	2.1	quit(0);
404
405			badopt:
406			sprintf(errmsg, "command line error at '%s'", argv[i]);
407			error(USER, errmsg);
408	schorsch	2.9	return 1; /* pro forma return */
409	greg	2.1
410			#undef check
411	schorsch	2.26	#undef check_bool
412	greg	2.1	}
413
414
415			void
416	schorsch	2.9	wputs( /* warning output function */
417			char *s
418			)
419	greg	2.1	{
420			int lasterrno = errno;
421			eputs(s);
422			errno = lasterrno;
423			}
424
425
426			void
427	schorsch	2.9	eputs( /* put string to stderr */
428	greg	2.38	char *s
429	schorsch	2.9	)
430	greg	2.1	{
431			static int midline = 0;
432
433			if (!*s)
434			return;
435			if (!midline++) {
436			fputs(progname, stderr);
437			fputs(": ", stderr);
438			}
439			fputs(s, stderr);
440			if (s[strlen(s)-1] == '\n') {
441			fflush(stderr);
442			midline = 0;
443			}
444			}
445
446
447	schorsch	2.9	static void
448			onsig( /* fatal signal */
449			int signo
450			)
451	greg	2.1	{
452			static int gotsig = 0;
453
454			if (gotsig++) /* two signals and we're gone! */
455			_exit(signo);
456
457	schorsch	2.5	#ifdef SIGALRM
458	greg	2.1	alarm(15); /* allow 15 seconds to clean up */
459			signal(SIGALRM, SIG_DFL); /* make certain we do die */
460	schorsch	2.5	#endif
461	greg	2.1	eputs("signal - ");
462			eputs(sigerr[signo]);
463			eputs("\n");
464			quit(3);
465			}
466
467
468	schorsch	2.9	static void
469			sigdie( /* set fatal signal */
470			int signo,
471			char *msg
472			)
473	greg	2.1	{
474			if (signal(signo, onsig) == SIG_IGN)
475			signal(signo, SIG_IGN);
476			sigerr[signo] = msg;
477			}
478
479
480	schorsch	2.9	static void
481	schorsch	2.8	printdefaults(void) /* print default values to stdout */
482	greg	2.1	{
483	greg	2.38	char *cp;
484	greg	2.1
485			if (imm_irrad)
486			printf("-I+\t\t\t\t# immediate irradiance on\n");
487	greg	2.18	printf("-n %-2d\t\t\t\t# number of rendering processes\n", nproc);
488	greg	2.21	printf("-x %-9d\t\t\t# %s\n", hresolu,
489			vresolu && hresolu ? "x resolution" : "flush interval");
490	greg	2.16	printf("-y %-9d\t\t\t# y resolution\n", vresolu);
491	greg	2.1	printf(lim_dist ? "-ld+\t\t\t\t# limit distance on\n" :
492			"-ld-\t\t\t\t# limit distance off\n");
493	greg	2.10	printf("-h%c\t\t\t\t# %s header\n", loadflags & IO_INFO ? '+' : '-',
494			loadflags & IO_INFO ? "output" : "no");
495	greg	2.1	printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
496			inform, outform, formstr(inform), formstr(outform));
497	greg	2.10	printf("-o%-9s\t\t\t# output", outvals);
498	greg	2.1	for (cp = outvals; *cp; cp++)
499			switch (*cp) {
500	greg	2.10	case 't': case 'T': printf(" trace"); break;
501	greg	2.1	case 'o': printf(" origin"); break;
502			case 'd': printf(" direction"); break;
503	greg	2.28	case 'r': printf(" reflect_contrib"); break;
504			case 'R': printf(" reflect_length"); break;
505			case 'x': printf(" unreflect_contrib"); break;
506			case 'X': printf(" unreflect_length"); break;
507	greg	2.1	case 'v': printf(" value"); break;
508	greg	2.13	case 'V': printf(" contribution"); break;
509	greg	2.1	case 'l': printf(" length"); break;
510			case 'L': printf(" first_length"); break;
511			case 'p': printf(" point"); break;
512			case 'n': printf(" normal"); break;
513			case 'N': printf(" unperturbed_normal"); break;
514			case 's': printf(" surface"); break;
515			case 'w': printf(" weight"); break;
516	greg	2.13	case 'W': printf(" coefficient"); break;
517	greg	2.1	case 'm': printf(" modifier"); break;
518	greg	2.10	case 'M': printf(" material"); break;
519	greg	2.37	case '~': printf(" tilde"); break;
520	greg	2.1	}
521			putchar('\n');
522			printf(erract[WARNING].pf != NULL ?
523			"-w+\t\t\t\t# warning messages on\n" :
524			"-w-\t\t\t\t# warning messages off\n");
525			print_rdefaults();
526			}