src/rt/rtmain.c

#ifndef lint
static const char       RCSid[] = "$Id: rtmain.c,v 2.46 2023/08/15 01:19:37 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 */

double  (*sens_curve)(SCOLOR scol) = NULL;      /* spectral conversion for 1-channel */
double  out_scalefactor = 1;            /* output calibration scale factor */
RGBPRIMP  out_prims = stdprims;         /* output color primitives (NULL if spectral) */
static RGBPRIMS  our_prims;             /* private output color primitives */

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" \
                        "Hyperspectral\nParticipatingMedia=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" \
                        "Hyperspectral\nParticipatingMedia=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 & spectral */
                        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;
                case 'p':                               /* value output */
                        switch (argv[i][2]) {
                        case 'R':                       /* standard RGB output */
                                if (strcmp(argv[i]+2, "RGB"))
                                        goto badopt;
                                out_prims = stdprims;
                                out_scalefactor = 1;
                                sens_curve = NULL;
                                break;
                        case 'X':                       /* XYZ output */
                                if (strcmp(argv[i]+2, "XYZ"))
                                        goto badopt;
                                out_prims = xyzprims;
                                out_scalefactor = WHTEFFICACY;
                                sens_curve = NULL;
                                break;
                        case 'c': {
                                int     j;
                                check(3,"ffffffff");
                                rval = 0;
                                for (j = 0; j < 8; j++) {
                                        our_prims[0][j] = atof(argv[++i]);
                                        rval |= fabs(our_prims[0][j]-stdprims[0][j]) > .001;
                                }
                                if (rval) {
                                        if (!colorprimsOK(our_prims))
                                                error(USER, "illegal primary chromaticities");
                                        out_prims = our_prims;
                                } else
                                        out_prims = stdprims;
                                out_scalefactor = 1;
                                sens_curve = NULL;
                                } break;
                        case 'Y':                       /* photopic response */
                                sens_curve = scolor_photopic;
                                out_scalefactor = WHTEFFICACY;
                                break;
                        case 'S':                       /* scotopic response */
                                sens_curve = scolor_scotopic;
                                out_scalefactor = WHTSCOTOPIC;
                                break;
                        case 'M':                       /* melanopic response */
                                sens_curve = scolor_melanopic;
                                out_scalefactor = WHTMELANOPIC;
                                break;
                        default:
                                goto badopt;
                        }
                        break;
#if MAXCSAMP>3
                case 'c':                               /* spectral sampling */
                        switch (argv[i][2]) {
                        case 's':                       /* spectral bin count */
                                check(3,"i");
                                NCSAMP = atoi(argv[++i]);
                                break;
                        case 'w':                       /* wavelength extrema */
                                check(3,"ff");
                                WLPART[0] = atof(argv[++i]);
                                WLPART[3] = atof(argv[++i]);
                                break;
                        case 'o':                       /* output spectral results */
                                rval = (out_prims == NULL);
                                check_bool(3,rval);
                                if (rval) out_prims = NULL;
                                else if (out_prims == NULL) out_prims = stdprims;
                                break;
                        default:
                                goto badopt;
                        }
                        break;
#endif
#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;
                }
        }
                                        /* set/check spectral sampling */
        rval = setspectrsamp(CNDX, WLPART);
        if (rval < 0)
                error(USER, "unsupported spectral sampling");
        if (out_prims != NULL) {
                if (!rval)
                        error(WARNING, "spectral range incompatible with color output");
        } else if (NCSAMP == 3)
                out_prims = stdprims;   /* 3 samples do not a spectrum make */
        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 */
                        fputncomp(rval, stdout);
                if (NCSAMP > 3)
                        fputwlsplit(WLPART, stdout);
                if ((out_prims != stdprims) & (out_prims != NULL))
                        fputprims(out_prims, stdout);
                if ((outform == 'f') | (outform == 'd'))
                        fputendian(stdout);
                fputformat(formstr(outform), stdout);
                fputc('\n', stdout);    /* end of header */
        }

        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(loadflags & IO_INFO ? "-h+\t\t\t\t# output header\n" :
                        "-h-\t\t\t\t# no header\n");
        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;
                }
        fputc('\n', stdout);
        if (NCSAMP > 3) {
                printf("-cs %-2d\t\t\t\t# number of spectral bins\n", NCSAMP);
                printf("-cw %3.0f %3.0f\t\t\t# wavelength limits (nm)\n",
                                WLPART[3], WLPART[0]);
                printf(out_prims != NULL ? "-co-\t\t\t\t# output tristimulus colors\n" :
                                "-co+\t\t\t\t# output spectral values\n");
        }
        if (sens_curve == scolor_photopic)
                printf("-pY\t\t\t\t# photopic output\n");
        else if (sens_curve == scolor_scotopic)
                printf("-pS\t\t\t\t# scotopic output\n");
        else if (sens_curve == scolor_melanopic)
                printf("-pM\t\t\t\t# melanopic output\n");
        else if (out_prims == stdprims)
                printf("-pRGB\t\t\t\t# standard RGB color output\n");
        else if (out_prims == xyzprims)
                printf("-pXYZ\t\t\t\t# CIE XYZ color output\n");
        else if (out_prims != NULL)
                printf("-pc %.4f %.4f %.4f %.4f %.4f %.4f %.4f %.4f\t# output color primaries and white point\n",
                                out_prims[RED][0], out_prims[RED][1],
                                out_prims[GRN][0], out_prims[GRN][1],
                                out_prims[BLU][0], out_prims[BLU][1],
                                out_prims[WHT][0], out_prims[WHT][1]);
        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:	2.47
Committed:	Wed Nov 15 18:02:53 2023 UTC (6 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.46:	+122 -9 lines
Log Message:	feat(rpict,rtrace,rcontrib,rtpict): Hyperspectral rendering (except photon map)
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.47	static const char RCSid[] = "$Id: rtmain.c,v 2.46 2023/08/15 01:19:37 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	2.47	double (sens_curve)(SCOLOR scol) = NULL; / spectral conversion for 1-channel */
63			double out_scalefactor = 1; /* output calibration scale factor */
64			RGBPRIMP out_prims = stdprims; /* output color primitives (NULL if spectral) */
65			static RGBPRIMS our_prims; /* private output color primitives */
66
67	greg	2.10	static int loadflags = ~IO_FILES; /* what to load from octree */
68
69	schorsch	2.9	static void onsig(int signo);
70			static void sigdie(int signo, char *msg);
71			static void printdefaults(void);
72	greg	2.1
73	greg	2.38	#ifdef PERSIST
74	greg	2.45	#define RTRACE_FEATURES "Persist\nParallelPersist\nMultiprocessing\n" \
75	greg	2.38	"IrradianceCalc\nImmediateIrradiance\nDistanceLimiting\n" \
76	greg	2.47	"Hyperspectral\nParticipatingMedia=Mist\n" \
77	greg	2.39	"HessianAmbientCache\nAmbientAveraging\n" \
78	greg	2.40	"AmbientValueSharing\nAdaptiveShadowTesting\n" \
79	greg	2.45	"InputFormats=a,f,d\nOutputFormats=a,f,d,c\n" \
80	greg	2.40	"Outputs=o,d,v,V,w,W,l,L,c,p,n,N,s,m,M,r,x,R,X,~\n"
81	greg	2.38	#else
82			#define RTRACE_FEATURES "IrradianceCalc\nIrradianceCalc\nDistanceLimiting\n" \
83	greg	2.47	"Hyperspectral\nParticipatingMedia=Mist\n" \
84	greg	2.39	"HessianAmbientCache\nAmbientAveraging\n" \
85	greg	2.40	"AmbientValueSharing\nAdaptiveShadowTesting\n" \
86	greg	2.45	"InputFormats=a,f,d\nOutputFormats=a,f,d,c\n" \
87	greg	2.40	"Outputs=o,d,v,V,w,W,l,L,c,p,n,N,s,m,M,r,x,R,X,~\n"
88	greg	2.38	#endif
89
90	greg	2.1
91			int
92	schorsch	2.9	main(int argc, char *argv[])
93	greg	2.1	{
94			#define check(ol,al) if (argv[i][ol] \|\| \
95			badarg(argc-i-1,argv+i+1,al)) \
96			goto badopt
97	schorsch	2.26	#define check_bool(olen,var) switch (argv[i][olen]) { \
98	greg	2.1	case '\0': var = !var; break; \
99			case 'y': case 'Y': case 't': case 'T': \
100			case '+': case '1': var = 1; break; \
101			case 'n': case 'N': case 'f': case 'F': \
102			case '-': case '0': var = 0; break; \
103			default: goto badopt; }
104	greg	2.25	extern char *octname;
105	greg	2.1	int persist = 0;
106	greg	2.18	char *octnm = NULL;
107	greg	2.22	char **tralp = NULL;
108			int duped1 = -1;
109	greg	2.1	int rval;
110			int i;
111			/* global program name */
112			progname = argv[0] = fixargv0(argv[0]);
113	greg	2.38	/* feature check only? */
114			strcat(RFeatureList, RTRACE_FEATURES);
115	greg	2.43	if (argc > 1 && !strcmp(argv[1], "-features"))
116	greg	2.38	return feature_status(argc-2, argv+2);
117	greg	2.18	/* add trace notify function */
118			for (i = 0; addobjnotify[i] != NULL; i++)
119			;
120			addobjnotify[i] = tranotify;
121	greg	2.1	/* option city */
122			for (i = 1; i < argc; i++) {
123			/* expand arguments */
124			while ((rval = expandarg(&argc, &argv, i)) > 0)
125			;
126			if (rval < 0) {
127			sprintf(errmsg, "cannot expand '%s'", argv[i]);
128			error(SYSTEM, errmsg);
129			}
130			if (argv[i] == NULL \|\| argv[i][0] != '-')
131			break; /* break from options */
132			if (!strcmp(argv[i], "-version")) {
133			puts(VersionID);
134			quit(0);
135			}
136			if (!strcmp(argv[i], "-defaults") \|\|
137			!strcmp(argv[i], "-help")) {
138			printdefaults();
139			quit(0);
140			}
141			rval = getrenderopt(argc-i, argv+i);
142			if (rval >= 0) {
143			i += rval;
144			continue;
145			}
146			switch (argv[i][1]) {
147	greg	2.18	case 'n': /* number of cores */
148			check(2,"i");
149			nproc = atoi(argv[++i]);
150			if (nproc <= 0)
151			error(USER, "bad number of processes");
152			break;
153	greg	2.1	case 'x': /* x resolution */
154			check(2,"i");
155			hresolu = atoi(argv[++i]);
156			break;
157			case 'y': /* y resolution */
158			check(2,"i");
159			vresolu = atoi(argv[++i]);
160			break;
161	greg	2.47	case 'w': /* warnings & spectral */
162	greg	2.1	rval = erract[WARNING].pf != NULL;
163	schorsch	2.26	check_bool(2,rval);
164	greg	2.1	if (rval) erract[WARNING].pf = wputs;
165			else erract[WARNING].pf = NULL;
166			break;
167			case 'e': /* error file */
168			check(2,"s");
169			errfile = argv[++i];
170			break;
171			case 'l': /* limit distance */
172			if (argv[i][2] != 'd')
173			goto badopt;
174	schorsch	2.26	check_bool(3,lim_dist);
175	greg	2.1	break;
176			case 'I': /* immed. irradiance */
177	schorsch	2.26	check_bool(2,imm_irrad);
178	greg	2.1	break;
179			case 'f': /* format i/o */
180			switch (argv[i][2]) {
181			case 'a': /* ascii */
182			case 'f': /* float */
183			case 'd': /* double */
184			inform = argv[i][2];
185			break;
186			default:
187			goto badopt;
188			}
189			switch (argv[i][3]) {
190			case '\0':
191			outform = inform;
192			break;
193			case 'a': /* ascii */
194			case 'f': /* float */
195			case 'd': /* double */
196			case 'c': /* color */
197			check(4,"");
198			outform = argv[i][3];
199			break;
200			default:
201			goto badopt;
202			}
203			break;
204			case 'o': /* output */
205			outvals = argv[i]+2;
206			break;
207			case 'h': /* header output */
208			rval = loadflags & IO_INFO;
209	schorsch	2.26	check_bool(2,rval);
210	greg	2.1	loadflags = rval ? loadflags \| IO_INFO :
211			loadflags & ~IO_INFO;
212			break;
213			case 't': /* trace */
214			switch (argv[i][2]) {
215			case 'i': /* include */
216			case 'I':
217			check(3,"s");
218			if (traincl != 1) {
219			traincl = 1;
220			tralp = tralist;
221			}
222			if (argv[i][2] == 'I') { /* file */
223	greg	2.27	rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
224	greg	2.3	getpath(argv[++i],getrlibpath(),R_OK));
225	greg	2.1	if (rval < 0) {
226			sprintf(errmsg,
227			"cannot open trace include file \"%s\"",
228			argv[i]);
229			error(SYSTEM, errmsg);
230			}
231			tralp += rval;
232			} else {
233			*tralp++ = argv[++i];
234			*tralp = NULL;
235			}
236			break;
237			case 'e': /* exclude */
238			case 'E':
239			check(3,"s");
240			if (traincl != 0) {
241			traincl = 0;
242			tralp = tralist;
243			}
244			if (argv[i][2] == 'E') { /* file */
245	greg	2.27	rval = wordfile(tralp, MAXMODLIST-(tralp-tralist),
246	greg	2.3	getpath(argv[++i],getrlibpath(),R_OK));
247	greg	2.1	if (rval < 0) {
248			sprintf(errmsg,
249			"cannot open trace exclude file \"%s\"",
250			argv[i]);
251			error(SYSTEM, errmsg);
252			}
253			tralp += rval;
254			} else {
255			*tralp++ = argv[++i];
256			*tralp = NULL;
257			}
258			break;
259			default:
260			goto badopt;
261			}
262			break;
263	greg	2.47	case 'p': /* value output */
264			switch (argv[i][2]) {
265			case 'R': /* standard RGB output */
266			if (strcmp(argv[i]+2, "RGB"))
267			goto badopt;
268			out_prims = stdprims;
269			out_scalefactor = 1;
270			sens_curve = NULL;
271			break;
272			case 'X': /* XYZ output */
273			if (strcmp(argv[i]+2, "XYZ"))
274			goto badopt;
275			out_prims = xyzprims;
276			out_scalefactor = WHTEFFICACY;
277			sens_curve = NULL;
278			break;
279			case 'c': {
280			int j;
281			check(3,"ffffffff");
282			rval = 0;
283			for (j = 0; j < 8; j++) {
284			our_prims[0][j] = atof(argv[++i]);
285			rval \|= fabs(our_prims[0][j]-stdprims[0][j]) > .001;
286			}
287			if (rval) {
288			if (!colorprimsOK(our_prims))
289			error(USER, "illegal primary chromaticities");
290			out_prims = our_prims;
291			} else
292			out_prims = stdprims;
293			out_scalefactor = 1;
294			sens_curve = NULL;
295			} break;
296			case 'Y': /* photopic response */
297			sens_curve = scolor_photopic;
298			out_scalefactor = WHTEFFICACY;
299			break;
300			case 'S': /* scotopic response */
301			sens_curve = scolor_scotopic;
302			out_scalefactor = WHTSCOTOPIC;
303			break;
304			case 'M': /* melanopic response */
305			sens_curve = scolor_melanopic;
306			out_scalefactor = WHTMELANOPIC;
307			break;
308			default:
309			goto badopt;
310			}
311			break;
312			#if MAXCSAMP>3
313			case 'c': /* spectral sampling */
314			switch (argv[i][2]) {
315			case 's': /* spectral bin count */
316			check(3,"i");
317			NCSAMP = atoi(argv[++i]);
318			break;
319			case 'w': /* wavelength extrema */
320			check(3,"ff");
321			WLPART[0] = atof(argv[++i]);
322			WLPART[3] = atof(argv[++i]);
323			break;
324			case 'o': /* output spectral results */
325			rval = (out_prims == NULL);
326			check_bool(3,rval);
327			if (rval) out_prims = NULL;
328			else if (out_prims == NULL) out_prims = stdprims;
329			break;
330			default:
331			goto badopt;
332			}
333			break;
334			#endif
335	greg	2.1	#ifdef PERSIST
336			case 'P': /* persist file */
337			if (argv[i][2] == 'P') {
338			check(3,"s");
339			persist = PARALLEL;
340			} else {
341			check(2,"s");
342			persist = PERSIST;
343			}
344			persistfile(argv[++i]);
345			break;
346			#endif
347			default:
348			goto badopt;
349			}
350			}
351	greg	2.47	/* set/check spectral sampling */
352			rval = setspectrsamp(CNDX, WLPART);
353			if (rval < 0)
354			error(USER, "unsupported spectral sampling");
355			if (out_prims != NULL) {
356			if (!rval)
357			error(WARNING, "spectral range incompatible with color output");
358			} else if (NCSAMP == 3)
359			out_prims = stdprims; /* 3 samples do not a spectrum make */
360	greg	2.34	if (nproc > 1 && persist)
361			error(USER, "multiprocessing incompatible with persist file");
362	greg	2.1	/* initialize object types */
363			initotypes();
364			/* initialize urand */
365	greg	2.14	if (rand_samp) {
366			srandom((long)time(0));
367			initurand(0);
368			} else {
369			srandom(0L);
370			initurand(2048);
371			}
372	greg	2.1	/* set up signal handling */
373			sigdie(SIGINT, "Interrupt");
374	schorsch	2.5	#ifdef SIGHUP
375	greg	2.1	sigdie(SIGHUP, "Hangup");
376	schorsch	2.5	#endif
377	greg	2.1	sigdie(SIGTERM, "Terminate");
378	schorsch	2.5	#ifdef SIGPIPE
379	greg	2.1	sigdie(SIGPIPE, "Broken pipe");
380	schorsch	2.5	#endif
381			#ifdef SIGALRM
382	greg	2.1	sigdie(SIGALRM, "Alarm clock");
383	schorsch	2.5	#endif
384	greg	2.1	#ifdef SIGXCPU
385			sigdie(SIGXCPU, "CPU limit exceeded");
386			sigdie(SIGXFSZ, "File size exceeded");
387			#endif
388			/* open error file */
389			if (errfile != NULL) {
390			if (freopen(errfile, "a", stderr) == NULL)
391			quit(2);
392			fprintf(stderr, "************\n* PID %5d: ",
393			getpid());
394			printargs(argc, argv, stderr);
395			putc('\n', stderr);
396			fflush(stderr);
397			}
398			#ifdef NICE
399			nice(NICE); /* lower priority */
400			#endif
401			/* get octree */
402			if (i == argc)
403	greg	2.18	octnm = NULL;
404	greg	2.1	else if (i == argc-1)
405	greg	2.18	octnm = argv[i];
406	greg	2.1	else
407			goto badopt;
408	greg	2.18	if (octnm == NULL)
409	greg	2.1	error(USER, "missing octree argument");
410			/* set up output */
411			#ifdef PERSIST
412			if (persist) {
413			duped1 = dup(fileno(stdout)); /* don't lose our output */
414			openheader();
415			}
416			#endif
417			if (outform != 'a')
418	schorsch	2.4	SET_FILE_BINARY(stdout);
419	greg	2.31	rval = setrtoutput();
420	greg	2.41	octname = savqstr(octnm);
421			readoct(octname, loadflags, &thescene, NULL);
422	greg	2.1	nsceneobjs = nobjects;
423
424			if (loadflags & IO_INFO) { /* print header */
425			printargs(i, argv, stdout);
426			printf("SOFTWARE= %s\n", VersionID);
427			fputnow(stdout);
428	greg	2.31	if (rval > 0) /* saved from setrtoutput() call */
429	greg	2.47	fputncomp(rval, stdout);
430			if (NCSAMP > 3)
431			fputwlsplit(WLPART, stdout);
432			if ((out_prims != stdprims) & (out_prims != NULL))
433			fputprims(out_prims, stdout);
434	greg	2.30	if ((outform == 'f') \| (outform == 'd'))
435			fputendian(stdout);
436	greg	2.1	fputformat(formstr(outform), stdout);
437	greg	2.47	fputc('\n', stdout); /* end of header */
438	greg	2.1	}
439
440	greg	2.32	if (!castonly) { /* any actual ray traversal to do? */
441
442			ray_init_pmap(); /* PMAP: set up & load photon maps */
443
444			marksources(); /* find and mark sources */
445
446			setambient(); /* initialize ambient calculation */
447	greg	2.33	} else
448			distantsources(); /* else mark only distant sources */
449	greg	2.35
450	greg	2.36	fflush(stdout); /* in case we're duplicating header */
451	greg	2.35
452	greg	2.1	#ifdef PERSIST
453			if (persist) {
454			/* reconnect stdout */
455			dup2(duped1, fileno(stdout));
456			close(duped1);
457			if (persist == PARALLEL) { /* multiprocessing */
458			preload_objs(); /* preload scene */
459			shm_boundary = (char *)malloc(16);
460			strcpy(shm_boundary, "SHM_BOUNDARY");
461			while ((rval=fork()) == 0) { /* keep on forkin' */
462			pflock(1);
463			pfhold();
464	greg	2.15	ambsync(); /* load new values */
465	greg	2.1	}
466			if (rval < 0)
467			error(SYSTEM, "cannot fork child for persist function");
468	greg	2.15	pfdetach(); /* parent will run then exit */
469	greg	2.1	}
470			}
471			runagain:
472			if (persist)
473			dupheader(); /* send header to stdout */
474			#endif
475			/* trace rays */
476	greg	2.19	rtrace(NULL, nproc);
477	greg	2.1	/* flush ambient file */
478			ambsync();
479			#ifdef PERSIST
480			if (persist == PERSIST) { /* first run-through */
481			if ((rval=fork()) == 0) { /* child loops until killed */
482			pflock(1);
483			persist = PCHILD;
484			} else { /* original process exits */
485			if (rval < 0)
486			error(SYSTEM, "cannot fork child for persist function");
487			pfdetach(); /* parent exits */
488			}
489			}
490			if (persist == PCHILD) { /* wait for a signal then go again */
491			pfhold();
492			raynum = nrays = 0; /* reinitialize */
493			goto runagain;
494			}
495			#endif
496	greg	2.23
497			ray_done_pmap(); /* PMAP: free photon maps */
498
499	greg	2.1	quit(0);
500
501			badopt:
502			sprintf(errmsg, "command line error at '%s'", argv[i]);
503			error(USER, errmsg);
504	schorsch	2.9	return 1; /* pro forma return */
505	greg	2.1
506			#undef check
507	schorsch	2.26	#undef check_bool
508	greg	2.1	}
509
510
511			void
512	schorsch	2.9	wputs( /* warning output function */
513	greg	2.44	const char *s
514	schorsch	2.9	)
515	greg	2.1	{
516			int lasterrno = errno;
517			eputs(s);
518			errno = lasterrno;
519			}
520
521
522			void
523	schorsch	2.9	eputs( /* put string to stderr */
524	greg	2.44	const char *s
525	schorsch	2.9	)
526	greg	2.1	{
527			static int midline = 0;
528
529			if (!*s)
530			return;
531			if (!midline++) {
532			fputs(progname, stderr);
533			fputs(": ", stderr);
534			}
535			fputs(s, stderr);
536			if (s[strlen(s)-1] == '\n') {
537			fflush(stderr);
538			midline = 0;
539			}
540			}
541
542
543	schorsch	2.9	static void
544			onsig( /* fatal signal */
545			int signo
546			)
547	greg	2.1	{
548			static int gotsig = 0;
549
550			if (gotsig++) /* two signals and we're gone! */
551			_exit(signo);
552
553	schorsch	2.5	#ifdef SIGALRM
554	greg	2.1	alarm(15); /* allow 15 seconds to clean up */
555			signal(SIGALRM, SIG_DFL); /* make certain we do die */
556	schorsch	2.5	#endif
557	greg	2.1	eputs("signal - ");
558			eputs(sigerr[signo]);
559			eputs("\n");
560			quit(3);
561			}
562
563
564	schorsch	2.9	static void
565			sigdie( /* set fatal signal */
566			int signo,
567			char *msg
568			)
569	greg	2.1	{
570			if (signal(signo, onsig) == SIG_IGN)
571			signal(signo, SIG_IGN);
572			sigerr[signo] = msg;
573			}
574
575
576	schorsch	2.9	static void
577	schorsch	2.8	printdefaults(void) /* print default values to stdout */
578	greg	2.1	{
579	greg	2.38	char *cp;
580	greg	2.1
581			if (imm_irrad)
582			printf("-I+\t\t\t\t# immediate irradiance on\n");
583	greg	2.18	printf("-n %-2d\t\t\t\t# number of rendering processes\n", nproc);
584	greg	2.21	printf("-x %-9d\t\t\t# %s\n", hresolu,
585			vresolu && hresolu ? "x resolution" : "flush interval");
586	greg	2.16	printf("-y %-9d\t\t\t# y resolution\n", vresolu);
587	greg	2.1	printf(lim_dist ? "-ld+\t\t\t\t# limit distance on\n" :
588			"-ld-\t\t\t\t# limit distance off\n");
589	greg	2.47	printf(loadflags & IO_INFO ? "-h+\t\t\t\t# output header\n" :
590			"-h-\t\t\t\t# no header\n");
591	greg	2.1	printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
592			inform, outform, formstr(inform), formstr(outform));
593	greg	2.10	printf("-o%-9s\t\t\t# output", outvals);
594	greg	2.1	for (cp = outvals; *cp; cp++)
595			switch (*cp) {
596	greg	2.10	case 't': case 'T': printf(" trace"); break;
597	greg	2.1	case 'o': printf(" origin"); break;
598			case 'd': printf(" direction"); break;
599	greg	2.28	case 'r': printf(" reflect_contrib"); break;
600			case 'R': printf(" reflect_length"); break;
601			case 'x': printf(" unreflect_contrib"); break;
602			case 'X': printf(" unreflect_length"); break;
603	greg	2.1	case 'v': printf(" value"); break;
604	greg	2.13	case 'V': printf(" contribution"); break;
605	greg	2.1	case 'l': printf(" length"); break;
606			case 'L': printf(" first_length"); break;
607			case 'p': printf(" point"); break;
608			case 'n': printf(" normal"); break;
609			case 'N': printf(" unperturbed_normal"); break;
610			case 's': printf(" surface"); break;
611			case 'w': printf(" weight"); break;
612	greg	2.13	case 'W': printf(" coefficient"); break;
613	greg	2.1	case 'm': printf(" modifier"); break;
614	greg	2.10	case 'M': printf(" material"); break;
615	greg	2.37	case '~': printf(" tilde"); break;
616	greg	2.1	}
617	greg	2.47	fputc('\n', stdout);
618			if (NCSAMP > 3) {
619			printf("-cs %-2d\t\t\t\t# number of spectral bins\n", NCSAMP);
620			printf("-cw %3.0f %3.0f\t\t\t# wavelength limits (nm)\n",
621			WLPART[3], WLPART[0]);
622			printf(out_prims != NULL ? "-co-\t\t\t\t# output tristimulus colors\n" :
623			"-co+\t\t\t\t# output spectral values\n");
624			}
625			if (sens_curve == scolor_photopic)
626			printf("-pY\t\t\t\t# photopic output\n");
627			else if (sens_curve == scolor_scotopic)
628			printf("-pS\t\t\t\t# scotopic output\n");
629			else if (sens_curve == scolor_melanopic)
630			printf("-pM\t\t\t\t# melanopic output\n");
631			else if (out_prims == stdprims)
632			printf("-pRGB\t\t\t\t# standard RGB color output\n");
633			else if (out_prims == xyzprims)
634			printf("-pXYZ\t\t\t\t# CIE XYZ color output\n");
635			else if (out_prims != NULL)
636			printf("-pc %.4f %.4f %.4f %.4f %.4f %.4f %.4f %.4f\t# output color primaries and white point\n",
637			out_prims[RED][0], out_prims[RED][1],
638			out_prims[GRN][0], out_prims[GRN][1],
639			out_prims[BLU][0], out_prims[BLU][1],
640			out_prims[WHT][0], out_prims[WHT][1]);
641	greg	2.1	printf(erract[WARNING].pf != NULL ?
642			"-w+\t\t\t\t# warning messages on\n" :
643			"-w-\t\t\t\t# warning messages off\n");
644			print_rdefaults();
645			}