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rcmain.c
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Wed, Nov 6, 16:00

rcmain.c
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#ifndef lint
static const char RCSid[] = "$Id: rcmain.c,v 2.20 2021/02/16 20:06:06 greg Exp $";
#endif
/*
* rcmain.c - main for rtcontrib ray contribution tracer
*/
#include "copyright.h"
#include <signal.h>
#include <time.h>
#include "rcontrib.h"
#include "random.h"
#include "source.h"
#include "ambient.h"
#include "pmapray.h"
#include "pmapcontrib.h"
int gargc; /* global argc */
char **gargv; /* global argv */
char *octname; /* global octree name */
char *progname; /* global argv[0] */
char *sigerr[NSIG]; /* signal error messages */
int nproc = 1; /* number of processes requested */
int nchild = 0; /* number of children (-1 in child) */
int inpfmt = 'a'; /* input format */
int outfmt = 'a'; /* output format */
int header = 1; /* output header? */
int force_open = 0; /* truncate existing output? */
int recover = 0; /* recover previous output? */
int accumulate = 1; /* input rays per output record */
int contrib = 0; /* computing contributions? */
int xres = 0; /* horizontal (scan) size */
int yres = 0; /* vertical resolution */
int using_stdout = 0; /* are we using stdout? */
int imm_irrad = 0; /* compute immediate irradiance? */
int lim_dist = 0; /* limit distance? */
int report_intvl = 0; /* reporting interval (seconds) */
char **modname = NULL; /* ordered modifier name list */
int nmods = 0; /* number of modifiers */
int modasiz = 0; /* allocated modifier array size */
void (*addobjnotify[8])() = {ambnotify, NULL};
char RCCONTEXT[] = "RC."; /* our special evaluation context */
static void
printdefaults(void) /* print default values to stdout */
{
printf("-c %-5d\t\t\t# accumulated rays per record\n", accumulate);
printf("-V%c\t\t\t\t# output %s\n", contrib ? '+' : '-',
contrib ? "contributions" : "coefficients");
if (imm_irrad)
printf("-I+\t\t\t\t# immediate irradiance on\n");
printf("-n %-2d\t\t\t\t# number of rendering processes\n", nproc);
printf("-x %-9d\t\t\t# %s\n", xres,
yres && xres ? "x resolution" : "flush interval");
printf("-y %-9d\t\t\t# y resolution\n", yres);
printf(lim_dist ? "-ld+\t\t\t\t# limit distance on\n" :
"-ld-\t\t\t\t# limit distance off\n");
printf("-h%c\t\t\t\t# %s header\n", header ? '+' : '-',
header ? "output" : "no");
printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
inpfmt, outfmt, formstr(inpfmt), formstr(outfmt));
printf(erract[WARNING].pf != NULL ?
"-w+\t\t\t\t# warning messages on\n" :
"-w-\t\t\t\t# warning messages off\n");
print_rdefaults();
}
static void
onsig( /* fatal signal */
int signo
)
{
static int gotsig = 0;
if (gotsig++) /* two signals and we're gone! */
_exit(signo);
#ifdef SIGALRM
alarm(15); /* allow 15 seconds to clean up */
signal(SIGALRM, SIG_DFL); /* make certain we do die */
#endif
eputs("signal - ");
eputs(sigerr[signo]);
eputs("\n");
quit(3);
}
static void
sigdie( /* set fatal signal */
int signo,
char *msg
)
{
if (signal(signo, onsig) == SIG_IGN)
signal(signo, SIG_IGN);
sigerr[signo] = msg;
}
/* set input/output format */
static void
setformat(const char *fmt)
{
switch (fmt[0]) {
case 'f':
case 'd':
SET_FILE_BINARY(stdin);
/* fall through */
case 'a':
inpfmt = fmt[0];
break;
default:
goto fmterr;
}
switch (fmt[1]) {
case '\0':
outfmt = inpfmt;
return;
case 'a':
case 'f':
case 'd':
case 'c':
outfmt = fmt[1];
break;
default:
goto fmterr;
}
if (!fmt[2])
return;
fmterr:
sprintf(errmsg, "Illegal i/o format: -f%s", fmt);
error(USER, errmsg);
}
/* Set overriding options */
static void
override_options(void)
{
shadthresh = 0;
ambssamp = 0;
ambacc = 0;
if (accumulate <= 0) /* no output flushing for single record */
xres = yres = 0;
}
int
main(int argc, char *argv[])
{
#define check(ol,al) if (argv[i][ol] || \
badarg(argc-i-1,argv+i+1,al)) \
goto badopt
#define check_bool(olen,var) switch (argv[i][olen]) { \
case '\0': var = !var; break; \
case 'y': case 'Y': case 't': case 'T': \
case '+': case '1': var = 1; break; \
case 'n': case 'N': case 'f': case 'F': \
case '-': case '0': var = 0; break; \
default: goto badopt; }
char *curout = NULL;
char *prms = NULL;
char *binval = NULL;
int bincnt = 0;
int rval;
int i;
/* global program name */
progname = argv[0] = fixargv0(argv[0]);
gargv = argv;
gargc = argc;
#if defined(_WIN32) || defined(_WIN64)
_setmaxstdio(2048); /* increase file limit to maximum */
#endif
/* initialize calcomp routines early */
initfunc();
setcontext(RCCONTEXT);
/* option city */
for (i = 1; i < argc; i++) {
/* expand arguments */
while ((rval = expandarg(&argc, &argv, i)) > 0)
;
if (rval < 0) {
sprintf(errmsg, "cannot expand '%s'", argv[i]);
error(SYSTEM, errmsg);
}
if (argv[i] == NULL || argv[i][0] != '-')
break; /* break from options */
if (!strcmp(argv[i], "-version")) {
puts(VersionID);
quit(0);
}
if (!strcmp(argv[i], "-defaults") ||
!strcmp(argv[i], "-help")) {
override_options();
printdefaults();
quit(0);
}
rval = getrenderopt(argc-i, argv+i);
if (rval >= 0) {
i += rval;
continue;
}
switch (argv[i][1]) {
case 'n': /* number of cores */
check(2,"i");
nproc = atoi(argv[++i]);
if (nproc <= 0)
error(USER, "bad number of processes");
break;
case 'V': /* output contributions */
check_bool(2,contrib);
break;
case 'x': /* x resolution */
check(2,"i");
xres = atoi(argv[++i]);
break;
case 'y': /* y resolution */
check(2,"i");
yres = atoi(argv[++i]);
break;
case 'w': /* warnings */
rval = (erract[WARNING].pf != NULL);
check_bool(2,rval);
if (rval) erract[WARNING].pf = wputs;
else erract[WARNING].pf = NULL;
break;
case 'e': /* expression */
check(2,"s");
scompile(argv[++i], NULL, 0);
break;
case 'l': /* limit distance */
if (argv[i][2] != 'd')
goto badopt;
check_bool(3,lim_dist);
break;
case 'I': /* immed. irradiance */
check_bool(2,imm_irrad);
break;
case 'f': /* file or force or format */
if (!argv[i][2]) {
check(2,"s");
loadfunc(argv[++i]);
break;
}
if (argv[i][2] == 'o') {
check_bool(3,force_open);
break;
}
setformat(argv[i]+2);
break;
case 'o': /* output */
check(2,"s");
curout = argv[++i];
break;
case 'c': /* input rays per output */
check(2,"i");
accumulate = atoi(argv[++i]);
break;
case 'r': /* recover output */
check_bool(2,recover);
break;
case 'h': /* header output */
check_bool(2,header);
break;
case 'p': /* parameter setting(s) */
check(2,"s");
set_eparams(prms = argv[++i]);
break;
case 'b': /* bin expression/count */
if (argv[i][2] == 'n') {
check(3,"s");
bincnt = (int)(eval(argv[++i]) + .5);
break;
}
check(2,"s");
binval = argv[++i];
break;
case 'm': /* modifier name */
check(2,"s");
addmodifier(argv[++i], curout, prms, binval, bincnt);
break;
case 'M': /* modifier file */
check(2,"s");
addmodfile(argv[++i], curout, prms, binval, bincnt);
break;
case 't': /* reporting interval */
check(2,"i");
report_intvl = atoi(argv[++i]);
break;
default:
goto badopt;
}
}
if (nmods <= 0)
error(USER, "missing required modifier argument");
/* override some option settings */
override_options();
/* initialize object types */
initotypes();
/* initialize urand */
if (rand_samp) {
srandom((long)time(0));
initurand(0);
} else {
srandom(0L);
initurand(2048);
}
/* set up signal handling */
sigdie(SIGINT, "Interrupt");
#ifdef SIGHUP
sigdie(SIGHUP, "Hangup");
#endif
sigdie(SIGTERM, "Terminate");
#ifdef SIGPIPE
sigdie(SIGPIPE, "Broken pipe");
#endif
#ifdef SIGALRM
sigdie(SIGALRM, "Alarm clock");
#endif
#ifdef SIGXCPU
sigdie(SIGXCPU, "CPU limit exceeded");
sigdie(SIGXFSZ, "File size exceeded");
#endif
#ifdef NICE
nice(NICE); /* lower priority */
#endif
/* get octree */
if (i == argc)
octname = NULL;
else if (i == argc-1)
octname = argv[i];
else
goto badopt;
if (octname == NULL)
error(USER, "missing octree argument");
readoct(octname, ~(IO_FILES|IO_INFO), &thescene, NULL);
nsceneobjs = nobjects;
#ifdef PMAP_CONTRIB
/* PMAP: init contribution LUT & load photon maps */
initPmapContribTab(&modconttab, &contrib);
ray_init_pmap();
#endif
marksources(); /* find and mark sources */
setambient(); /* initialize ambient calculation */
rcontrib(); /* trace ray contributions (loop) */
ambsync(); /* flush ambient file */
#ifdef PMAP_CONTRIB
/* PMAP: free photon maps */
ray_done_pmap();
#endif
quit(0); /* exit clean */
badopt:
fprintf(stderr,
"Usage: %s [-n nprocs][-V][-c count][-r][-e expr][-f source][-o ospec][-p p1=V1,p2=V2][-b binv][-bn N] {-m mod | -M file} [rtrace options] octree\n",
progname);
sprintf(errmsg, "command line error at '%s'", argv[i]);
error(USER, errmsg);
return(1); /* pro forma return */
#undef check
#undef check_bool
}
void
wputs( /* warning output function */
char *s
)
{
int lasterrno = errno;
eputs(s);
errno = lasterrno;
}
void
eputs( /* put string to stderr */
char *s
)
{
static int midline = 0;
if (!*s)
return;
if (!midline++) {
fputs(progname, stderr);
fputs(": ", stderr);
}
fputs(s, stderr);
if (s[strlen(s)-1] == '\n') {
fflush(stderr);
midline = 0;
}
}

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