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rtmain.c
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Fri, Oct 4, 15:14

rtmain.c
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#ifndef lint
static const char RCSid[] = "$Id: rtmain.c,v 2.34 2020/04/08 00:57:39 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);
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]);
/* 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 */
#ifdef PERSIST
if (persist) {
fflush(stdout);
/* 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 */
register 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 */
{
register 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(" stroke"); 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();
}

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