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Sourcecode: radiance version File versions  Download package

rtmain.c

#ifndef lint
static const char RCSid[] = "$Id: rtmain.c,v 2.15 2007/09/13 20:02:11 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"

                              /* 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  *progname;              /* argv[0] */
char  *octname;                     /* octree name */
char  *sigerr[NSIG];                /* signal error messages */
char  *shm_boundary = NULL;         /* boundary of shared memory */
char  *errfile = NULL;              /* error output file */

extern char  *formstr();            /* string from format */
extern int  inform;                 /* input format */
extern int  outform;                /* output format */
extern char  *outvals;              /* output values */

extern int  hresolu;                /* horizontal resolution */
extern int  vresolu;                /* vertical resolution */

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

extern char  *tralist[];            /* list of modifers to trace (or no) */
extern int  traincl;                /* 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      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; }
      int  persist = 0;
      char  **tralp;
      int  duped1;
      int  rval;
      int  i;
                              /* global program name */
      progname = argv[0] = fixargv0(argv[0]);
                              /* 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 '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;
                  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;
                  bool(3,lim_dist);
                  break;
            case 'I':                     /* immed. irradiance */
                  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;
                  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,
                              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,
                              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;
            }
      }
                              /* 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)
            octname = NULL;
      else if (i == argc-1)
            octname = argv[i];
      else
            goto badopt;
      if (octname == 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);
      readoct(octname, loadflags, &thescene, NULL);
      nsceneobjs = nobjects;

      if (loadflags & IO_INFO) {    /* print header */
            printargs(i, argv, stdout);
            printf("SOFTWARE= %s\n", VersionID);
            fputnow(stdout);
            fputformat(formstr(outform), stdout);
            putchar('\n');
      }

      marksources();                /* find and mark sources */

      setambient();                 /* initialize ambient calculation */

#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);
                              /* 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 */
            close(duped1);                /* release output handle */
            pfhold();
            raynum = nrays = 0;           /* reinitialize */
            goto runagain;
      }
#endif
      quit(0);

badopt:
      sprintf(errmsg, "command line error at '%s'", argv[i]);
      error(USER, errmsg);
      return 1; /* pro forma return */

#undef      check
#undef      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("-x  %-9d\t\t\t# x resolution (flush interval)\n", hresolu);
      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 '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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