src/rt/rtmain.c

#ifndef lint
static const char       RCSid[] = "$Id: rtmain.c,v 2.45 2023/08/15 00:46:56 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" \
                        "ParticipatingMedia=Mist\n" \
                        "HessianAmbientCache\nAmbientAveraging\n" \
                        "AmbientValueSharing\nAdaptiveShadowTesting\n" \
                        "InputFormats=a,f,d\nOutputFormats=a,f,d,c\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" \
                        "ParticipatingMedia=Mist\n" \
                        "HessianAmbientCache\nAmbientAveraging\n" \
                        "AmbientValueSharing\nAdaptiveShadowTesting\n" \
                        "InputFormats=a,f,d\nOutputFormats=a,f,d,c\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:	2.46
Committed:	Tue Aug 15 01:19:37 2023 UTC (20 months, 2 weeks ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R4
Changes since 2.45:	+3 -1 lines
Log Message:	fix(rcontrib): Removed participating media from rcontrib -features
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.46	static const char RCSid[] = "$Id: rtmain.c,v 2.45 2023/08/15 00:46:56 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	greg	2.45	#define RTRACE_FEATURES "Persist\nParallelPersist\nMultiprocessing\n" \
70	greg	2.38	"IrradianceCalc\nImmediateIrradiance\nDistanceLimiting\n" \
71	greg	2.46	"ParticipatingMedia=Mist\n" \
72	greg	2.39	"HessianAmbientCache\nAmbientAveraging\n" \
73	greg	2.40	"AmbientValueSharing\nAdaptiveShadowTesting\n" \
74	greg	2.45	"InputFormats=a,f,d\nOutputFormats=a,f,d,c\n" \
75	greg	2.40	"Outputs=o,d,v,V,w,W,l,L,c,p,n,N,s,m,M,r,x,R,X,~\n"
76	greg	2.38	#else
77			#define RTRACE_FEATURES "IrradianceCalc\nIrradianceCalc\nDistanceLimiting\n" \
78	greg	2.46	"ParticipatingMedia=Mist\n" \
79	greg	2.39	"HessianAmbientCache\nAmbientAveraging\n" \
80	greg	2.40	"AmbientValueSharing\nAdaptiveShadowTesting\n" \
81	greg	2.45	"InputFormats=a,f,d\nOutputFormats=a,f,d,c\n" \
82	greg	2.40	"Outputs=o,d,v,V,w,W,l,L,c,p,n,N,s,m,M,r,x,R,X,~\n"
83	greg	2.38	#endif
84
85	greg	2.1
86			int
87	schorsch	2.9	main(int argc, char *argv[])
88	greg	2.1	{
89			#define check(ol,al) if (argv[i][ol] \|\| \
90			badarg(argc-i-1,argv+i+1,al)) \
91			goto badopt
92	schorsch	2.26	#define check_bool(olen,var) switch (argv[i][olen]) { \
93	greg	2.1	case '\0': var = !var; break; \
94			case 'y': case 'Y': case 't': case 'T': \
95			case '+': case '1': var = 1; break; \
96			case 'n': case 'N': case 'f': case 'F': \
97			case '-': case '0': var = 0; break; \
98			default: goto badopt; }
99	greg	2.25	extern char *octname;
100	greg	2.1	int persist = 0;
101	greg	2.18	char *octnm = NULL;
102	greg	2.22	char **tralp = NULL;
103			int duped1 = -1;
104	greg	2.1	int rval;
105			int i;
106			/* global program name */
107			progname = argv[0] = fixargv0(argv[0]);
108	greg	2.38	/* feature check only? */
109			strcat(RFeatureList, RTRACE_FEATURES);
110	greg	2.43	if (argc > 1 && !strcmp(argv[1], "-features"))
111	greg	2.38	return feature_status(argc-2, argv+2);
112	greg	2.18	/* add trace notify function */
113			for (i = 0; addobjnotify[i] != NULL; i++)
114			;
115			addobjnotify[i] = tranotify;
116	greg	2.1	/* option city */
117			for (i = 1; i < argc; i++) {
118			/* expand arguments */
119			while ((rval = expandarg(&argc, &argv, i)) > 0)
120			;
121			if (rval < 0) {
122			sprintf(errmsg, "cannot expand '%s'", argv[i]);
123			error(SYSTEM, errmsg);
124			}
125			if (argv[i] == NULL \|\| argv[i][0] != '-')
126			break; /* break from options */
127			if (!strcmp(argv[i], "-version")) {
128			puts(VersionID);
129			quit(0);
130			}
131			if (!strcmp(argv[i], "-defaults") \|\|
132			!strcmp(argv[i], "-help")) {
133			printdefaults();
134			quit(0);
135			}
136			rval = getrenderopt(argc-i, argv+i);
137			if (rval >= 0) {
138			i += rval;
139			continue;
140			}
141			switch (argv[i][1]) {
142	greg	2.18	case 'n': /* number of cores */
143			check(2,"i");
144			nproc = atoi(argv[++i]);
145			if (nproc <= 0)
146			error(USER, "bad number of processes");
147			break;
148	greg	2.1	case 'x': /* x resolution */
149			check(2,"i");
150			hresolu = atoi(argv[++i]);
151			break;
152			case 'y': /* y resolution */
153			check(2,"i");
154			vresolu = atoi(argv[++i]);
155			break;
156			case 'w': /* warnings */
157			rval = erract[WARNING].pf != NULL;
158	schorsch	2.26	check_bool(2,rval);
159	greg	2.1	if (rval) erract[WARNING].pf = wputs;
160			else erract[WARNING].pf = NULL;
161			break;
162			case 'e': /* error file */
163			check(2,"s");
164			errfile = argv[++i];
165			break;
166			case 'l': /* limit distance */
167			if (argv[i][2] != 'd')
168			goto badopt;
169	schorsch	2.26	check_bool(3,lim_dist);
170	greg	2.1	break;
171			case 'I': /* immed. irradiance */
172	schorsch	2.26	check_bool(2,imm_irrad);
173	greg	2.1	break;
174			case 'f': /* format i/o */
175			switch (argv[i][2]) {
176			case 'a': /* ascii */
177			case 'f': /* float */
178			case 'd': /* double */
179			inform = argv[i][2];
180			break;
181			default:
182			goto badopt;
183			}
184			switch (argv[i][3]) {
185			case '\0':
186			outform = inform;
187			break;
188			case 'a': /* ascii */
189			case 'f': /* float */
190			case 'd': /* double */
191			case 'c': /* color */
192			check(4,"");
193			outform = argv[i][3];
194			break;
195			default:
196			goto badopt;
197			}
198			break;
199			case 'o': /* output */
200			outvals = argv[i]+2;
201			break;
202			case 'h': /* header output */
203			rval = loadflags & IO_INFO;
204	schorsch	2.26	check_bool(2,rval);
205	greg	2.1	loadflags = rval ? loadflags \| IO_INFO :
206			loadflags & ~IO_INFO;
207			break;
208			case 't': /* trace */
209			switch (argv[i][2]) {
210			case 'i': /* include */
211			case 'I':
212			check(3,"s");
213			if (traincl != 1) {
214			traincl = 1;
215			tralp = tralist;
216			}
217			if (argv[i][2] == 'I') { /* file */
218	greg	2.27	rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
219	greg	2.3	getpath(argv[++i],getrlibpath(),R_OK));
220	greg	2.1	if (rval < 0) {
221			sprintf(errmsg,
222			"cannot open trace include file \"%s\"",
223			argv[i]);
224			error(SYSTEM, errmsg);
225			}
226			tralp += rval;
227			} else {
228			*tralp++ = argv[++i];
229			*tralp = NULL;
230			}
231			break;
232			case 'e': /* exclude */
233			case 'E':
234			check(3,"s");
235			if (traincl != 0) {
236			traincl = 0;
237			tralp = tralist;
238			}
239			if (argv[i][2] == 'E') { /* file */
240	greg	2.27	rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
241	greg	2.3	getpath(argv[++i],getrlibpath(),R_OK));
242	greg	2.1	if (rval < 0) {
243			sprintf(errmsg,
244			"cannot open trace exclude file \"%s\"",
245			argv[i]);
246			error(SYSTEM, errmsg);
247			}
248			tralp += rval;
249			} else {
250			*tralp++ = argv[++i];
251			*tralp = NULL;
252			}
253			break;
254			default:
255			goto badopt;
256			}
257			break;
258			#ifdef PERSIST
259			case 'P': /* persist file */
260			if (argv[i][2] == 'P') {
261			check(3,"s");
262			persist = PARALLEL;
263			} else {
264			check(2,"s");
265			persist = PERSIST;
266			}
267			persistfile(argv[++i]);
268			break;
269			#endif
270			default:
271			goto badopt;
272			}
273			}
274	greg	2.34	if (nproc > 1 && persist)
275			error(USER, "multiprocessing incompatible with persist file");
276	greg	2.1	/* initialize object types */
277			initotypes();
278			/* initialize urand */
279	greg	2.14	if (rand_samp) {
280			srandom((long)time(0));
281			initurand(0);
282			} else {
283			srandom(0L);
284			initurand(2048);
285			}
286	greg	2.1	/* set up signal handling */
287			sigdie(SIGINT, "Interrupt");
288	schorsch	2.5	#ifdef SIGHUP
289	greg	2.1	sigdie(SIGHUP, "Hangup");
290	schorsch	2.5	#endif
291	greg	2.1	sigdie(SIGTERM, "Terminate");
292	schorsch	2.5	#ifdef SIGPIPE
293	greg	2.1	sigdie(SIGPIPE, "Broken pipe");
294	schorsch	2.5	#endif
295			#ifdef SIGALRM
296	greg	2.1	sigdie(SIGALRM, "Alarm clock");
297	schorsch	2.5	#endif
298	greg	2.1	#ifdef SIGXCPU
299			sigdie(SIGXCPU, "CPU limit exceeded");
300			sigdie(SIGXFSZ, "File size exceeded");
301			#endif
302			/* open error file */
303			if (errfile != NULL) {
304			if (freopen(errfile, "a", stderr) == NULL)
305			quit(2);
306			fprintf(stderr, "************\n* PID %5d: ",
307			getpid());
308			printargs(argc, argv, stderr);
309			putc('\n', stderr);
310			fflush(stderr);
311			}
312			#ifdef NICE
313			nice(NICE); /* lower priority */
314			#endif
315			/* get octree */
316			if (i == argc)
317	greg	2.18	octnm = NULL;
318	greg	2.1	else if (i == argc-1)
319	greg	2.18	octnm = argv[i];
320	greg	2.1	else
321			goto badopt;
322	greg	2.18	if (octnm == NULL)
323	greg	2.1	error(USER, "missing octree argument");
324			/* set up output */
325			#ifdef PERSIST
326			if (persist) {
327			duped1 = dup(fileno(stdout)); /* don't lose our output */
328			openheader();
329			}
330			#endif
331			if (outform != 'a')
332	schorsch	2.4	SET_FILE_BINARY(stdout);
333	greg	2.31	rval = setrtoutput();
334	greg	2.41	octname = savqstr(octnm);
335			readoct(octname, loadflags, &thescene, NULL);
336	greg	2.1	nsceneobjs = nobjects;
337
338			if (loadflags & IO_INFO) { /* print header */
339			printargs(i, argv, stdout);
340			printf("SOFTWARE= %s\n", VersionID);
341			fputnow(stdout);
342	greg	2.31	if (rval > 0) /* saved from setrtoutput() call */
343			printf("NCOMP=%d\n", rval);
344	greg	2.30	if ((outform == 'f') \| (outform == 'd'))
345			fputendian(stdout);
346	greg	2.1	fputformat(formstr(outform), stdout);
347			putchar('\n');
348			}
349
350	greg	2.32	if (!castonly) { /* any actual ray traversal to do? */
351
352			ray_init_pmap(); /* PMAP: set up & load photon maps */
353
354			marksources(); /* find and mark sources */
355
356			setambient(); /* initialize ambient calculation */
357	greg	2.33	} else
358			distantsources(); /* else mark only distant sources */
359	greg	2.35
360	greg	2.36	fflush(stdout); /* in case we're duplicating header */
361	greg	2.35
362	greg	2.1	#ifdef PERSIST
363			if (persist) {
364			/* reconnect stdout */
365			dup2(duped1, fileno(stdout));
366			close(duped1);
367			if (persist == PARALLEL) { /* multiprocessing */
368			preload_objs(); /* preload scene */
369			shm_boundary = (char *)malloc(16);
370			strcpy(shm_boundary, "SHM_BOUNDARY");
371			while ((rval=fork()) == 0) { /* keep on forkin' */
372			pflock(1);
373			pfhold();
374	greg	2.15	ambsync(); /* load new values */
375	greg	2.1	}
376			if (rval < 0)
377			error(SYSTEM, "cannot fork child for persist function");
378	greg	2.15	pfdetach(); /* parent will run then exit */
379	greg	2.1	}
380			}
381			runagain:
382			if (persist)
383			dupheader(); /* send header to stdout */
384			#endif
385			/* trace rays */
386	greg	2.19	rtrace(NULL, nproc);
387	greg	2.1	/* flush ambient file */
388			ambsync();
389			#ifdef PERSIST
390			if (persist == PERSIST) { /* first run-through */
391			if ((rval=fork()) == 0) { /* child loops until killed */
392			pflock(1);
393			persist = PCHILD;
394			} else { /* original process exits */
395			if (rval < 0)
396			error(SYSTEM, "cannot fork child for persist function");
397			pfdetach(); /* parent exits */
398			}
399			}
400			if (persist == PCHILD) { /* wait for a signal then go again */
401			pfhold();
402			raynum = nrays = 0; /* reinitialize */
403			goto runagain;
404			}
405			#endif
406	greg	2.23
407			ray_done_pmap(); /* PMAP: free photon maps */
408
409	greg	2.1	quit(0);
410
411			badopt:
412			sprintf(errmsg, "command line error at '%s'", argv[i]);
413			error(USER, errmsg);
414	schorsch	2.9	return 1; /* pro forma return */
415	greg	2.1
416			#undef check
417	schorsch	2.26	#undef check_bool
418	greg	2.1	}
419
420
421			void
422	schorsch	2.9	wputs( /* warning output function */
423	greg	2.44	const char *s
424	schorsch	2.9	)
425	greg	2.1	{
426			int lasterrno = errno;
427			eputs(s);
428			errno = lasterrno;
429			}
430
431
432			void
433	schorsch	2.9	eputs( /* put string to stderr */
434	greg	2.44	const char *s
435	schorsch	2.9	)
436	greg	2.1	{
437			static int midline = 0;
438
439			if (!*s)
440			return;
441			if (!midline++) {
442			fputs(progname, stderr);
443			fputs(": ", stderr);
444			}
445			fputs(s, stderr);
446			if (s[strlen(s)-1] == '\n') {
447			fflush(stderr);
448			midline = 0;
449			}
450			}
451
452
453	schorsch	2.9	static void
454			onsig( /* fatal signal */
455			int signo
456			)
457	greg	2.1	{
458			static int gotsig = 0;
459
460			if (gotsig++) /* two signals and we're gone! */
461			_exit(signo);
462
463	schorsch	2.5	#ifdef SIGALRM
464	greg	2.1	alarm(15); /* allow 15 seconds to clean up */
465			signal(SIGALRM, SIG_DFL); /* make certain we do die */
466	schorsch	2.5	#endif
467	greg	2.1	eputs("signal - ");
468			eputs(sigerr[signo]);
469			eputs("\n");
470			quit(3);
471			}
472
473
474	schorsch	2.9	static void
475			sigdie( /* set fatal signal */
476			int signo,
477			char *msg
478			)
479	greg	2.1	{
480			if (signal(signo, onsig) == SIG_IGN)
481			signal(signo, SIG_IGN);
482			sigerr[signo] = msg;
483			}
484
485
486	schorsch	2.9	static void
487	schorsch	2.8	printdefaults(void) /* print default values to stdout */
488	greg	2.1	{
489	greg	2.38	char *cp;
490	greg	2.1
491			if (imm_irrad)
492			printf("-I+\t\t\t\t# immediate irradiance on\n");
493	greg	2.18	printf("-n %-2d\t\t\t\t# number of rendering processes\n", nproc);
494	greg	2.21	printf("-x %-9d\t\t\t# %s\n", hresolu,
495			vresolu && hresolu ? "x resolution" : "flush interval");
496	greg	2.16	printf("-y %-9d\t\t\t# y resolution\n", vresolu);
497	greg	2.1	printf(lim_dist ? "-ld+\t\t\t\t# limit distance on\n" :
498			"-ld-\t\t\t\t# limit distance off\n");
499	greg	2.10	printf("-h%c\t\t\t\t# %s header\n", loadflags & IO_INFO ? '+' : '-',
500			loadflags & IO_INFO ? "output" : "no");
501	greg	2.1	printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
502			inform, outform, formstr(inform), formstr(outform));
503	greg	2.10	printf("-o%-9s\t\t\t# output", outvals);
504	greg	2.1	for (cp = outvals; *cp; cp++)
505			switch (*cp) {
506	greg	2.10	case 't': case 'T': printf(" trace"); break;
507	greg	2.1	case 'o': printf(" origin"); break;
508			case 'd': printf(" direction"); break;
509	greg	2.28	case 'r': printf(" reflect_contrib"); break;
510			case 'R': printf(" reflect_length"); break;
511			case 'x': printf(" unreflect_contrib"); break;
512			case 'X': printf(" unreflect_length"); break;
513	greg	2.1	case 'v': printf(" value"); break;
514	greg	2.13	case 'V': printf(" contribution"); break;
515	greg	2.1	case 'l': printf(" length"); break;
516			case 'L': printf(" first_length"); break;
517			case 'p': printf(" point"); break;
518			case 'n': printf(" normal"); break;
519			case 'N': printf(" unperturbed_normal"); break;
520			case 's': printf(" surface"); break;
521			case 'w': printf(" weight"); break;
522	greg	2.13	case 'W': printf(" coefficient"); break;
523	greg	2.1	case 'm': printf(" modifier"); break;
524	greg	2.10	case 'M': printf(" material"); break;
525	greg	2.37	case '~': printf(" tilde"); break;
526	greg	2.1	}
527			putchar('\n');
528			printf(erract[WARNING].pf != NULL ?
529			"-w+\t\t\t\t# warning messages on\n" :
530			"-w-\t\t\t\t# warning messages off\n");
531			print_rdefaults();
532			}