src/rt/rtmain.c

#ifndef lint
static const char       RCSid[] = "$Id: rtmain.c,v 2.43 2023/02/06 20:37:06 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 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" \
                        "Outputs=o,d,v,V,w,W,l,L,c,p,n,N,s,m,M,r,x,R,X,~\n"
#else
#define RTRACE_FEATURES "IrradianceCalc\nIrradianceCalc\nDistanceLimiting\n" \
                        "HessianAmbientCache\nAmbientAveraging\n" \
                        "AmbientValueSharing\nAdaptiveShadowTesting\n" \
                        "Outputs=o,d,v,V,w,W,l,L,c,p,n,N,s,m,M,r,x,R,X,~\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 (argc > 1 && !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();
        octname = savqstr(octnm);
        readoct(octname, 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 */
        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;
        }
}


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:	2.44
Committed:	Mon Feb 6 22:40:21 2023 UTC (15 months, 1 week ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.43:	+3 -4 lines
Log Message:	refactor: Changed some char* args to const char* to avoid warnings
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.44	static const char RCSid[] = "$Id: rtmain.c,v 2.43 2023/02/06 20:37:06 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 int setrtoutput(void); /* set output values */
39	greg	2.32
40	greg	2.18	int inform = 'a'; /* input format */
41			int outform = 'a'; /* output format */
42			char outvals = "v"; / output specification */
43	greg	2.1
44	greg	2.18	int hresolu = 0; /* horizontal (scan) size */
45			int vresolu = 0; /* vertical resolution */
46	greg	2.1
47	greg	2.33	extern int castonly; /* only doing ray-casting? */
48	greg	2.32
49	greg	2.18	int imm_irrad = 0; /* compute immediate irradiance? */
50			int lim_dist = 0; /* limit distance? */
51
52			#ifndef MAXMODLIST
53			#define MAXMODLIST 1024 /* maximum modifiers we'll track */
54			#endif
55	greg	2.1
56	greg	2.18	extern void (addobjnotify[])(); / object notification calls */
57			extern void tranotify(OBJECT obj);
58
59			char tralist[MAXMODLIST]; / list of modifers to trace (or no) */
60			int traincl = -1; /* include == 1, exclude == 0 */
61	greg	2.1
62	greg	2.10	static int loadflags = ~IO_FILES; /* what to load from octree */
63
64	schorsch	2.9	static void onsig(int signo);
65			static void sigdie(int signo, char *msg);
66			static void printdefaults(void);
67	greg	2.1
68	greg	2.38	#ifdef PERSIST
69			#define RTRACE_FEATURES "Persist\nParallelPersist\nMultiProcessing\n" \
70			"IrradianceCalc\nImmediateIrradiance\nDistanceLimiting\n" \
71	greg	2.39	"HessianAmbientCache\nAmbientAveraging\n" \
72	greg	2.40	"AmbientValueSharing\nAdaptiveShadowTesting\n" \
73			"Outputs=o,d,v,V,w,W,l,L,c,p,n,N,s,m,M,r,x,R,X,~\n"
74	greg	2.38	#else
75			#define RTRACE_FEATURES "IrradianceCalc\nIrradianceCalc\nDistanceLimiting\n" \
76	greg	2.39	"HessianAmbientCache\nAmbientAveraging\n" \
77	greg	2.40	"AmbientValueSharing\nAdaptiveShadowTesting\n" \
78			"Outputs=o,d,v,V,w,W,l,L,c,p,n,N,s,m,M,r,x,R,X,~\n"
79	greg	2.38	#endif
80
81	greg	2.1
82			int
83	schorsch	2.9	main(int argc, char *argv[])
84	greg	2.1	{
85			#define check(ol,al) if (argv[i][ol] \|\| \
86			badarg(argc-i-1,argv+i+1,al)) \
87			goto badopt
88	schorsch	2.26	#define check_bool(olen,var) switch (argv[i][olen]) { \
89	greg	2.1	case '\0': var = !var; break; \
90			case 'y': case 'Y': case 't': case 'T': \
91			case '+': case '1': var = 1; break; \
92			case 'n': case 'N': case 'f': case 'F': \
93			case '-': case '0': var = 0; break; \
94			default: goto badopt; }
95	greg	2.25	extern char *octname;
96	greg	2.1	int persist = 0;
97	greg	2.18	char *octnm = NULL;
98	greg	2.22	char **tralp = NULL;
99			int duped1 = -1;
100	greg	2.1	int rval;
101			int i;
102			/* global program name */
103			progname = argv[0] = fixargv0(argv[0]);
104	greg	2.38	/* feature check only? */
105			strcat(RFeatureList, RTRACE_FEATURES);
106	greg	2.43	if (argc > 1 && !strcmp(argv[1], "-features"))
107	greg	2.38	return feature_status(argc-2, argv+2);
108	greg	2.18	/* add trace notify function */
109			for (i = 0; addobjnotify[i] != NULL; i++)
110			;
111			addobjnotify[i] = tranotify;
112	greg	2.1	/* option city */
113			for (i = 1; i < argc; i++) {
114			/* expand arguments */
115			while ((rval = expandarg(&argc, &argv, i)) > 0)
116			;
117			if (rval < 0) {
118			sprintf(errmsg, "cannot expand '%s'", argv[i]);
119			error(SYSTEM, errmsg);
120			}
121			if (argv[i] == NULL \|\| argv[i][0] != '-')
122			break; /* break from options */
123			if (!strcmp(argv[i], "-version")) {
124			puts(VersionID);
125			quit(0);
126			}
127			if (!strcmp(argv[i], "-defaults") \|\|
128			!strcmp(argv[i], "-help")) {
129			printdefaults();
130			quit(0);
131			}
132			rval = getrenderopt(argc-i, argv+i);
133			if (rval >= 0) {
134			i += rval;
135			continue;
136			}
137			switch (argv[i][1]) {
138	greg	2.18	case 'n': /* number of cores */
139			check(2,"i");
140			nproc = atoi(argv[++i]);
141			if (nproc <= 0)
142			error(USER, "bad number of processes");
143			break;
144	greg	2.1	case 'x': /* x resolution */
145			check(2,"i");
146			hresolu = atoi(argv[++i]);
147			break;
148			case 'y': /* y resolution */
149			check(2,"i");
150			vresolu = atoi(argv[++i]);
151			break;
152			case 'w': /* warnings */
153			rval = erract[WARNING].pf != NULL;
154	schorsch	2.26	check_bool(2,rval);
155	greg	2.1	if (rval) erract[WARNING].pf = wputs;
156			else erract[WARNING].pf = NULL;
157			break;
158			case 'e': /* error file */
159			check(2,"s");
160			errfile = argv[++i];
161			break;
162			case 'l': /* limit distance */
163			if (argv[i][2] != 'd')
164			goto badopt;
165	schorsch	2.26	check_bool(3,lim_dist);
166	greg	2.1	break;
167			case 'I': /* immed. irradiance */
168	schorsch	2.26	check_bool(2,imm_irrad);
169	greg	2.1	break;
170			case 'f': /* format i/o */
171			switch (argv[i][2]) {
172			case 'a': /* ascii */
173			case 'f': /* float */
174			case 'd': /* double */
175			inform = argv[i][2];
176			break;
177			default:
178			goto badopt;
179			}
180			switch (argv[i][3]) {
181			case '\0':
182			outform = inform;
183			break;
184			case 'a': /* ascii */
185			case 'f': /* float */
186			case 'd': /* double */
187			case 'c': /* color */
188			check(4,"");
189			outform = argv[i][3];
190			break;
191			default:
192			goto badopt;
193			}
194			break;
195			case 'o': /* output */
196			outvals = argv[i]+2;
197			break;
198			case 'h': /* header output */
199			rval = loadflags & IO_INFO;
200	schorsch	2.26	check_bool(2,rval);
201	greg	2.1	loadflags = rval ? loadflags \| IO_INFO :
202			loadflags & ~IO_INFO;
203			break;
204			case 't': /* trace */
205			switch (argv[i][2]) {
206			case 'i': /* include */
207			case 'I':
208			check(3,"s");
209			if (traincl != 1) {
210			traincl = 1;
211			tralp = tralist;
212			}
213			if (argv[i][2] == 'I') { /* file */
214	greg	2.27	rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
215	greg	2.3	getpath(argv[++i],getrlibpath(),R_OK));
216	greg	2.1	if (rval < 0) {
217			sprintf(errmsg,
218			"cannot open trace include file \"%s\"",
219			argv[i]);
220			error(SYSTEM, errmsg);
221			}
222			tralp += rval;
223			} else {
224			*tralp++ = argv[++i];
225			*tralp = NULL;
226			}
227			break;
228			case 'e': /* exclude */
229			case 'E':
230			check(3,"s");
231			if (traincl != 0) {
232			traincl = 0;
233			tralp = tralist;
234			}
235			if (argv[i][2] == 'E') { /* file */
236	greg	2.27	rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
237	greg	2.3	getpath(argv[++i],getrlibpath(),R_OK));
238	greg	2.1	if (rval < 0) {
239			sprintf(errmsg,
240			"cannot open trace exclude file \"%s\"",
241			argv[i]);
242			error(SYSTEM, errmsg);
243			}
244			tralp += rval;
245			} else {
246			*tralp++ = argv[++i];
247			*tralp = NULL;
248			}
249			break;
250			default:
251			goto badopt;
252			}
253			break;
254			#ifdef PERSIST
255			case 'P': /* persist file */
256			if (argv[i][2] == 'P') {
257			check(3,"s");
258			persist = PARALLEL;
259			} else {
260			check(2,"s");
261			persist = PERSIST;
262			}
263			persistfile(argv[++i]);
264			break;
265			#endif
266			default:
267			goto badopt;
268			}
269			}
270	greg	2.34	if (nproc > 1 && persist)
271			error(USER, "multiprocessing incompatible with persist file");
272	greg	2.1	/* initialize object types */
273			initotypes();
274			/* initialize urand */
275	greg	2.14	if (rand_samp) {
276			srandom((long)time(0));
277			initurand(0);
278			} else {
279			srandom(0L);
280			initurand(2048);
281			}
282	greg	2.1	/* set up signal handling */
283			sigdie(SIGINT, "Interrupt");
284	schorsch	2.5	#ifdef SIGHUP
285	greg	2.1	sigdie(SIGHUP, "Hangup");
286	schorsch	2.5	#endif
287	greg	2.1	sigdie(SIGTERM, "Terminate");
288	schorsch	2.5	#ifdef SIGPIPE
289	greg	2.1	sigdie(SIGPIPE, "Broken pipe");
290	schorsch	2.5	#endif
291			#ifdef SIGALRM
292	greg	2.1	sigdie(SIGALRM, "Alarm clock");
293	schorsch	2.5	#endif
294	greg	2.1	#ifdef SIGXCPU
295			sigdie(SIGXCPU, "CPU limit exceeded");
296			sigdie(SIGXFSZ, "File size exceeded");
297			#endif
298			/* open error file */
299			if (errfile != NULL) {
300			if (freopen(errfile, "a", stderr) == NULL)
301			quit(2);
302			fprintf(stderr, "************\n* PID %5d: ",
303			getpid());
304			printargs(argc, argv, stderr);
305			putc('\n', stderr);
306			fflush(stderr);
307			}
308			#ifdef NICE
309			nice(NICE); /* lower priority */
310			#endif
311			/* get octree */
312			if (i == argc)
313	greg	2.18	octnm = NULL;
314	greg	2.1	else if (i == argc-1)
315	greg	2.18	octnm = argv[i];
316	greg	2.1	else
317			goto badopt;
318	greg	2.18	if (octnm == NULL)
319	greg	2.1	error(USER, "missing octree argument");
320			/* set up output */
321			#ifdef PERSIST
322			if (persist) {
323			duped1 = dup(fileno(stdout)); /* don't lose our output */
324			openheader();
325			}
326			#endif
327			if (outform != 'a')
328	schorsch	2.4	SET_FILE_BINARY(stdout);
329	greg	2.31	rval = setrtoutput();
330	greg	2.41	octname = savqstr(octnm);
331			readoct(octname, loadflags, &thescene, NULL);
332	greg	2.1	nsceneobjs = nobjects;
333
334			if (loadflags & IO_INFO) { /* print header */
335			printargs(i, argv, stdout);
336			printf("SOFTWARE= %s\n", VersionID);
337			fputnow(stdout);
338	greg	2.31	if (rval > 0) /* saved from setrtoutput() call */
339			printf("NCOMP=%d\n", rval);
340	greg	2.30	if ((outform == 'f') \| (outform == 'd'))
341			fputendian(stdout);
342	greg	2.1	fputformat(formstr(outform), stdout);
343			putchar('\n');
344			}
345
346	greg	2.32	if (!castonly) { /* any actual ray traversal to do? */
347
348			ray_init_pmap(); /* PMAP: set up & load photon maps */
349
350			marksources(); /* find and mark sources */
351
352			setambient(); /* initialize ambient calculation */
353	greg	2.33	} else
354			distantsources(); /* else mark only distant sources */
355	greg	2.35
356	greg	2.36	fflush(stdout); /* in case we're duplicating header */
357	greg	2.35
358	greg	2.1	#ifdef PERSIST
359			if (persist) {
360			/* reconnect stdout */
361			dup2(duped1, fileno(stdout));
362			close(duped1);
363			if (persist == PARALLEL) { /* multiprocessing */
364			preload_objs(); /* preload scene */
365			shm_boundary = (char *)malloc(16);
366			strcpy(shm_boundary, "SHM_BOUNDARY");
367			while ((rval=fork()) == 0) { /* keep on forkin' */
368			pflock(1);
369			pfhold();
370	greg	2.15	ambsync(); /* load new values */
371	greg	2.1	}
372			if (rval < 0)
373			error(SYSTEM, "cannot fork child for persist function");
374	greg	2.15	pfdetach(); /* parent will run then exit */
375	greg	2.1	}
376			}
377			runagain:
378			if (persist)
379			dupheader(); /* send header to stdout */
380			#endif
381			/* trace rays */
382	greg	2.19	rtrace(NULL, nproc);
383	greg	2.1	/* flush ambient file */
384			ambsync();
385			#ifdef PERSIST
386			if (persist == PERSIST) { /* first run-through */
387			if ((rval=fork()) == 0) { /* child loops until killed */
388			pflock(1);
389			persist = PCHILD;
390			} else { /* original process exits */
391			if (rval < 0)
392			error(SYSTEM, "cannot fork child for persist function");
393			pfdetach(); /* parent exits */
394			}
395			}
396			if (persist == PCHILD) { /* wait for a signal then go again */
397			pfhold();
398			raynum = nrays = 0; /* reinitialize */
399			goto runagain;
400			}
401			#endif
402	greg	2.23
403			ray_done_pmap(); /* PMAP: free photon maps */
404
405	greg	2.1	quit(0);
406
407			badopt:
408			sprintf(errmsg, "command line error at '%s'", argv[i]);
409			error(USER, errmsg);
410	schorsch	2.9	return 1; /* pro forma return */
411	greg	2.1
412			#undef check
413	schorsch	2.26	#undef check_bool
414	greg	2.1	}
415
416
417			void
418	schorsch	2.9	wputs( /* warning output function */
419	greg	2.44	const char *s
420	schorsch	2.9	)
421	greg	2.1	{
422			int lasterrno = errno;
423			eputs(s);
424			errno = lasterrno;
425			}
426
427
428			void
429	schorsch	2.9	eputs( /* put string to stderr */
430	greg	2.44	const char *s
431	schorsch	2.9	)
432	greg	2.1	{
433			static int midline = 0;
434
435			if (!*s)
436			return;
437			if (!midline++) {
438			fputs(progname, stderr);
439			fputs(": ", stderr);
440			}
441			fputs(s, stderr);
442			if (s[strlen(s)-1] == '\n') {
443			fflush(stderr);
444			midline = 0;
445			}
446			}
447
448
449	schorsch	2.9	static void
450			onsig( /* fatal signal */
451			int signo
452			)
453	greg	2.1	{
454			static int gotsig = 0;
455
456			if (gotsig++) /* two signals and we're gone! */
457			_exit(signo);
458
459	schorsch	2.5	#ifdef SIGALRM
460	greg	2.1	alarm(15); /* allow 15 seconds to clean up */
461			signal(SIGALRM, SIG_DFL); /* make certain we do die */
462	schorsch	2.5	#endif
463	greg	2.1	eputs("signal - ");
464			eputs(sigerr[signo]);
465			eputs("\n");
466			quit(3);
467			}
468
469
470	schorsch	2.9	static void
471			sigdie( /* set fatal signal */
472			int signo,
473			char *msg
474			)
475	greg	2.1	{
476			if (signal(signo, onsig) == SIG_IGN)
477			signal(signo, SIG_IGN);
478			sigerr[signo] = msg;
479			}
480
481
482	schorsch	2.9	static void
483	schorsch	2.8	printdefaults(void) /* print default values to stdout */
484	greg	2.1	{
485	greg	2.38	char *cp;
486	greg	2.1
487			if (imm_irrad)
488			printf("-I+\t\t\t\t# immediate irradiance on\n");
489	greg	2.18	printf("-n %-2d\t\t\t\t# number of rendering processes\n", nproc);
490	greg	2.21	printf("-x %-9d\t\t\t# %s\n", hresolu,
491			vresolu && hresolu ? "x resolution" : "flush interval");
492	greg	2.16	printf("-y %-9d\t\t\t# y resolution\n", vresolu);
493	greg	2.1	printf(lim_dist ? "-ld+\t\t\t\t# limit distance on\n" :
494			"-ld-\t\t\t\t# limit distance off\n");
495	greg	2.10	printf("-h%c\t\t\t\t# %s header\n", loadflags & IO_INFO ? '+' : '-',
496			loadflags & IO_INFO ? "output" : "no");
497	greg	2.1	printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
498			inform, outform, formstr(inform), formstr(outform));
499	greg	2.10	printf("-o%-9s\t\t\t# output", outvals);
500	greg	2.1	for (cp = outvals; *cp; cp++)
501			switch (*cp) {
502	greg	2.10	case 't': case 'T': printf(" trace"); break;
503	greg	2.1	case 'o': printf(" origin"); break;
504			case 'd': printf(" direction"); break;
505	greg	2.28	case 'r': printf(" reflect_contrib"); break;
506			case 'R': printf(" reflect_length"); break;
507			case 'x': printf(" unreflect_contrib"); break;
508			case 'X': printf(" unreflect_length"); break;
509	greg	2.1	case 'v': printf(" value"); break;
510	greg	2.13	case 'V': printf(" contribution"); break;
511	greg	2.1	case 'l': printf(" length"); break;
512			case 'L': printf(" first_length"); break;
513			case 'p': printf(" point"); break;
514			case 'n': printf(" normal"); break;
515			case 'N': printf(" unperturbed_normal"); break;
516			case 's': printf(" surface"); break;
517			case 'w': printf(" weight"); break;
518	greg	2.13	case 'W': printf(" coefficient"); break;
519	greg	2.1	case 'm': printf(" modifier"); break;
520	greg	2.10	case 'M': printf(" material"); break;
521	greg	2.37	case '~': printf(" tilde"); break;
522	greg	2.1	}
523			putchar('\n');
524			printf(erract[WARNING].pf != NULL ?
525			"-w+\t\t\t\t# warning messages on\n" :
526			"-w-\t\t\t\t# warning messages off\n");
527			print_rdefaults();
528			}