src/rt/rmain.c

/* Copyright (c) 1986 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  rmain.c - main for ray tracing programs
 *
 *     3/24/87
 */

                                        /* for flaky pre-processors */
#ifndef  RPICT
#define  RPICT          0
#endif
#ifndef  RTRACE
#define  RTRACE         0
#endif
#ifndef  RVIEW
#define  RVIEW          0
#endif

#include  "ray.h"

#include  "octree.h"

#include  <signal.h>

#include  "view.h"

#ifndef  DEFPATH
#define  DEFPATH        ":/usr/local/lib/ray"
#endif
#ifndef  ULIBVAR
#define  ULIBVAR        "RAYPATH"
#endif

char  *progname;                        /* argv[0] */

char  *octname;                         /* octree name */

char  *libpath;                         /* library directory list */

char  *sigerr[NSIG];                    /* signal error messages */

extern int  stderr_v();                 /* standard error output */
int  (*errvec)() = stderr_v;            /* error output vector */
int  (*wrnvec)() = stderr_v;            /* warning output vector */
int  (*cmdvec)() = NULL;                /* command error vector */

int  (*trace)() = NULL;                 /* trace call */

CUBE  thescene;                         /* our scene */

extern int  ralrm;                      /* seconds between reports */
extern float  pctdone;                  /* percentage done */

extern int  greyscale;                  /* map colors to brightness? */
extern char  *devname;                  /* output device name */

extern int  inform;                     /* input format */
extern int  outform;                    /* output format */
extern char  *outvals;                  /* output values */

extern VIEW  ourview;                   /* viewing parameters */

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

extern int  psample;                    /* pixel sample size */
extern double  maxdiff;                 /* max. sample difference */
extern double  dstrpix;                 /* square pixel distribution */

extern double  dstrsrc;                 /* square source distribution */
extern double  shadthresh;              /* shadow threshold */
extern double  shadcert;                /* shadow testing certainty */

extern int  maxdepth;                   /* maximum recursion depth */
extern double  minweight;               /* minimum ray weight */
extern long  nrays;                     /* number of rays traced */

extern COLOR  ambval;                   /* ambient value */
extern double  ambacc;                  /* ambient accuracy */
extern int  ambres;                     /* ambient resolution */
extern int  ambdiv;                     /* ambient divisions */
extern int  ambssamp;                   /* ambient super-samples */
extern int  ambounce;                   /* ambient bounces */
extern char  *amblist[];                /* ambient include/exclude list */
extern int  ambincl;                    /* include == 1, exclude == 0 */


main(argc, argv)
int  argc;
char  *argv[];
{
#define  check(olen,narg)       if (argv[i][olen] || narg >= argc-i) goto badopt
        double  atof();
        char  *getenv();
        int  report();
        char  *err;
        char  *recover = NULL;
        char  *zfile = NULL;
        char  *errfile = NULL;
        char  *ambfile = NULL;
        char  **amblp = amblist;
        int  loadflags = ~IO_FILES;
        int  rval, gotvfile = 0;
        int  i;
                                        /* global program name */
        progname = argv[0];
                                        /* get library path */
        if ((libpath = getenv(ULIBVAR)) == NULL)
                libpath = DEFPATH;
                                        /* option city */
        for (i = 1; i < argc && argv[i][0] == '-'; i++) {
                if (!strcmp(argv[i], "-defaults") ||
                                !strcmp(argv[i], "-help")) {
                        printdefaults();
                        quit(0);
                }
#if  RVIEW
                if (!strcmp(argv[i], "-devices")) {
                        printdevices();
                        quit(0);
                }
#endif
#if  RPICT|RVIEW
                rval = getviewopt(&ourview, argc-i, argv+i);
                if (rval >= 0) {
                        i += rval;
                        continue;
                }
#endif
                switch (argv[i][1]) {
#if  RPICT|RVIEW
                case 'v':                               /* view file */
                        if (argv[i][2] != 'f')
                                goto badopt;
                        check(3,1);
                        rval = viewfile(argv[++i], &ourview);
                        if (rval < 0) {
                                sprintf(errmsg,
                                "cannot open view file \"%s\"",
                                                argv[i]);
                                error(SYSTEM, errmsg);
                        } else if (rval == 0) {
                                sprintf(errmsg,
                                        "bad view file \"%s\"",
                                                argv[i]);
                                error(USER, errmsg);
                        } else
                                gotvfile += rval;
                        break;
#endif
                case 'd':                               /* direct */
                        switch (argv[i][2]) {
                        case 't':                               /* threshold */
                                check(3,1);
                                shadthresh = atof(argv[++i]);
                                break;
                        case 'c':                               /* certainty */
                                check(3,1);
                                shadcert = atof(argv[++i]);
                                break;
                        case 'j':                               /* jitter */
                                check(3,1);
                                dstrsrc = atof(argv[++i]);
                                break;
                        default:
                                goto badopt;
                        }
                        break;
#if  RPICT|RVIEW
                case 's':                               /* sample */
                        switch (argv[i][2]) {
                        case 'p':                               /* pixel */
                                check(3,1);
                                psample = atoi(argv[++i]);
                                break;
                        case 't':                               /* threshold */
                                check(3,1);
                                maxdiff = atof(argv[++i]);
                                break;
#if  RPICT
                        case 'j':                               /* jitter */
                                check(3,1);
                                dstrpix = atof(argv[++i]);
                                break;
#endif
                        default:
                                goto badopt;
                        }
                        break;
#endif
                case 'x':                               /* x resolution */
                        check(2,1);
                        hresolu = atoi(argv[++i]);
                        break;
                case 'y':                               /* y resolution */
                        check(2,1);
                        vresolu = atoi(argv[++i]);
                        break;
                case 'w':                               /* warnings */
                        check(2,0);
                        wrnvec = wrnvec==NULL ? stderr_v : NULL;
                        break;
                case 'e':                               /* error file */
                        check(2,1);
                        errfile = argv[++i];
                        break;
                case 'l':                               /* limit */
                        switch (argv[i][2]) {
                        case 'r':                               /* recursion */
                                check(3,1);
                                maxdepth = atoi(argv[++i]);
                                break;
                        case 'w':                               /* weight */
                                check(3,1);
                                minweight = atof(argv[++i]);
                                break;
                        default:
                                goto badopt;
                        }
                        break;
#if  RPICT
                case 'z':                               /* z file */
                        check(2,1);
                        zfile = argv[++i];
                        break;
                case 'r':                               /* recover file */
                        check(2,1);
                        recover = argv[++i];
                        rval = viewfile(recover, &ourview);
                        if (rval <= 0) {
                                sprintf(errmsg,
                        "cannot recover view parameters from \"%s\"", recover);
                                error(WARNING, errmsg);
                        } else
                                gotvfile += rval;
                        break;
                case 't':                               /* timer */
                        check(2,1);
                        ralrm = atoi(argv[++i]);
                        break;
#endif
                case 'a':                               /* ambient */
                        switch (argv[i][2]) {
                        case 'v':                               /* value */
                                check(3,3);
                                setcolor(ambval, atof(argv[i+1]),
                                                atof(argv[i+2]),
                                                atof(argv[i+3]));
                                i += 3;
                                break;
                        case 'a':                               /* accuracy */
                                check(3,1);
                                ambacc = atof(argv[++i]);
                                break;
                        case 'r':                               /* resolution */
                                check(3,1);
                                ambres = atoi(argv[++i]);
                                break;
                        case 'd':                               /* divisions */
                                check(3,1);
                                ambdiv = atoi(argv[++i]);
                                break;
                        case 's':                               /* super-samp */
                                check(3,1);
                                ambssamp = atoi(argv[++i]);
                                break;
                        case 'b':                               /* bounces */
                                check(3,1);
                                ambounce = atoi(argv[++i]);
                                break;
                        case 'i':                               /* include */
                                check(3,1);
                                if (ambincl != 1) {
                                        ambincl = 1;
                                        amblp = amblist;
                                }
                                *amblp++ = argv[++i];
                                break;
                        case 'e':                               /* exclude */
                                check(3,1);
                                if (ambincl != 0) {
                                        ambincl = 0;
                                        amblp = amblist;
                                }
                                *amblp++ = argv[++i];
                                break;
                        case 'f':                               /* file */
                                check(3,1);
                                ambfile= argv[++i];
                                break;
                        default:
                                goto badopt;
                        }
                        break;
#if  RTRACE
                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 */
                                check(4,0);
                                outform = argv[i][3];
                                break;
                        default:
                                goto badopt;
                        }
                        break;
                case 'o':                               /* output */
                        outvals = argv[i]+2;
                        break;
                case 'h':                               /* toggle header */
                        check(2,0);
                        loadflags ^= IO_INFO;
                        break;
#endif
#if  RVIEW
                case 'b':                               /* black and white */
                        check(2,0);
                        greyscale = !greyscale;
                        break;
                case 'o':                               /* output device */
                        check(2,1);
                        devname = argv[++i];
                        break;
#endif
                default:
                        goto badopt;
                }
        }
#if  RPICT|RVIEW
        err = setview(&ourview);        /* set viewing parameters */
        if (err != NULL)
                error(USER, err);
#endif
                                        /* set up signal handling */
        sigdie(SIGINT, "Interrupt");
        sigdie(SIGHUP, "Hangup");
        sigdie(SIGTERM, "Terminate");
        sigdie(SIGPIPE, "Broken pipe");
#ifdef  SIGXCPU
        sigdie(SIGXCPU, "CPU limit exceeded");
        sigdie(SIGXFSZ, "File size exceeded");
#endif
#if  RPICT
        signal(SIGALRM, report);
#else
        sigdie(SIGALRM, "Alarm clock");
#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);
                fputs("\n", stderr);
                fflush(stderr);
        }
#ifdef  NICE
        nice(NICE);                     /* lower priority */
#endif
                                        /* get octree */
#if  RVIEW
        loadflags &= ~IO_INFO;
#endif
        if (i == argc)
                octname = NULL;
        else if (i == argc-1)
                octname = argv[i];
        else
                goto badopt;
#if  RVIEW|RTRACE
        if (octname == NULL)
                error(USER, "missing octree argument");
#endif
        readoct(octname, loadflags, &thescene, NULL);

        if (loadflags & IO_INFO) {      /* print header */
                printargs(i, argv, stdout);
#if  RPICT
                if (gotvfile) {
                        printf(VIEWSTR);
                        fprintview(&ourview, stdout);
                        printf("\n");
                }
#endif
                printf("\n");
        }

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

        *amblp = NULL;                  /* initialize ambient calculation */
        setambient(ambfile);

#if  RPICT
        if (ralrm > 0)                  /* report init time */
                report();
        render(zfile, recover);         /* render the scene */
#endif
#if  RTRACE
        rtrace(NULL);                   /* trace rays from stdin */
#endif
#if  RVIEW
        rview();                        /* go */
#endif
        quit(0);

badopt:
        sprintf(errmsg, "command line error at '%s'", argv[i]);
        error(USER, errmsg);

#undef  check
}


eputs(s)                                /* error output */
char  *s;
{
        if (errvec != NULL)
                (*errvec)(s);
}


wputs(s)                                /* warning output */
char  *s;
{
        if (wrnvec != NULL)
                (*wrnvec)(s);
}


cputs(s)                                /* command error output */
char  *s;
{
        if (cmdvec != NULL)
                (*cmdvec)(s);
}


stderr_v(s)                             /* put string to stderr */
register char  *s;
{
        static int  inline = 0;

        if (!inline++) {
                fputs(progname, stderr);
                fputs(": ", stderr);
        }
        fputs(s, stderr);
        if (*s && s[strlen(s)-1] == '\n') {
                fflush(stderr);
                inline = 0;
        }
}


onsig(signo)                            /* fatal signal */
int  signo;
{
        static int  gotsig = 0;

        if (gotsig++)                   /* two signals and we're gone! */
                _exit(signo);

        eputs("signal - ");
        eputs(sigerr[signo]);
        eputs("\n");
        quit(3);
}


sigdie(signo, msg)                      /* set fatal signal */
int  signo;
char  *msg;
{
        if (signal(signo, onsig) == SIG_IGN)
                signal(signo, SIG_IGN);
        sigerr[signo] = msg;
}


printdefaults()                 /* print default values to stdout */
{
        register char  *cp;

#if  RPICT|RVIEW
        printf("-vt%c\t\t\t\t# view type %s\n", ourview.type,
                        ourview.type==VT_PER ? "perspective" :
                        ourview.type==VT_PAR ? "parallel" :
                        "unknown");
        printf("-vp %f %f %f\t# view point\n",
                        ourview.vp[0], ourview.vp[1], ourview.vp[2]);
        printf("-vd %f %f %f\t# view direction\n", 
                        ourview.vdir[0], ourview.vdir[1], ourview.vdir[2]);
        printf("-vu %f %f %f\t# view up\n", 
                        ourview.vup[0], ourview.vup[1], ourview.vup[2]);
        printf("-vh %f\t\t\t# view horizontal size\n", ourview.horiz);
        printf("-vv %f\t\t\t# view vertical size\n", ourview.vert);
        printf("-vs  %f\t\t\t# view shift\n", ourview.hoff);
        printf("-vl  %f\t\t\t# view lift\n", ourview.voff);
#endif
        printf("-x  %-9d\t\t\t# x resolution\n", hresolu);
        printf("-y  %-9d\t\t\t# y resolution\n", vresolu);
        printf("-dt %f\t\t\t# direct threshold\n", shadthresh);
        printf("-dc %f\t\t\t# direct certainty\n", shadcert);
        printf("-dj %f\t\t\t# direct jitter\n", dstrsrc);
#if  RPICT|RVIEW
        printf("-sp %-9d\t\t\t# sample pixel\n", psample);
        printf("-st %f\t\t\t# sample threshold\n", maxdiff);
#if  RPICT
        printf("-sj %f\t\t\t# sample jitter\n", dstrpix);
#endif
#endif
        printf("-av %f %f %f\t# ambient value\n", colval(ambval,RED),
                        colval(ambval,GRN), colval(ambval, BLU));
        printf("-ab %-9d\t\t\t# ambient bounces\n", ambounce);
        printf("-aa %f\t\t\t# ambient accuracy\n", ambacc);
        printf("-ar %-9d\t\t\t# ambient resolution\n", ambres);
        printf("-ad %-9d\t\t\t# ambient divisions\n", ambdiv);
        printf("-as %-9d\t\t\t# ambient super-samples\n", ambssamp);
        printf("-lr %-9d\t\t\t# limit reflection\n", maxdepth);
        printf("-lw %f\t\t\t# limit weight\n", minweight);
#if  RPICT
        printf("-t  %-9d\t\t\t# time between reports\n", ralrm);
#endif
#if  RVIEW
        printf("-o %s\t\t\t\t# output device\n", devname);
#endif
#if  RTRACE
        printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
                        inform, outform, 
                        inform=='a' ? "ascii" :
                        inform=='f' ? "float" : "double",
                        outform=='a' ? "ascii" :
                        outform=='f' ? "float" : "double");
        printf("-o%s\t\t\t\t# output", outvals);
        for (cp = outvals; *cp; cp++)
                switch (*cp) {
                case 'i': printf(" irradiance"); break;
                case 't': printf(" trace"); break;
                case 'o': printf(" origin"); break;
                case 'd': printf(" direction"); break;
                case 'v': printf(" value"); break;
                case 'l': printf(" length"); break;
                case 'p': printf(" point"); break;
                case 'n': printf(" normal"); break;
                case 's': printf(" surface"); break;
                case 'w': printf(" weight"); break;
                case 'm': printf(" modifier"); break;
                }
        printf("\n");
#endif
}
Revision:	1.21
Committed:	Mon Jan 8 13:37:58 1990 UTC (35 years, 5 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.20:	+25 -64 lines
Log Message:	Changed handling of view parameters
#	User	Rev	Content
1	greg	1.1	/* Copyright (c) 1986 Regents of the University of California */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* rmain.c - main for ray tracing programs
9			*
10			* 3/24/87
11			*/
12
13			/* for flaky pre-processors */
14			#ifndef RPICT
15			#define RPICT 0
16			#endif
17			#ifndef RTRACE
18			#define RTRACE 0
19			#endif
20			#ifndef RVIEW
21			#define RVIEW 0
22			#endif
23
24			#include "ray.h"
25
26			#include "octree.h"
27
28			#include <signal.h>
29
30			#include "view.h"
31
32			#ifndef DEFPATH
33			#define DEFPATH ":/usr/local/lib/ray"
34			#endif
35	greg	1.17	#ifndef ULIBVAR
36	greg	1.1	#define ULIBVAR "RAYPATH"
37	greg	1.17	#endif
38	greg	1.1
39			char progname; / argv[0] */
40
41	greg	1.19	char octname; / octree name */
42
43	greg	1.1	char libpath; / library directory list */
44
45			char sigerr[NSIG]; / signal error messages */
46
47			extern int stderr_v(); /* standard error output */
48			int (errvec)() = stderr_v; / error output vector */
49			int (wrnvec)() = stderr_v; / warning output vector */
50			int (cmdvec)() = NULL; / command error vector */
51
52			int (trace)() = NULL; / trace call */
53
54			CUBE thescene; /* our scene */
55
56			extern int ralrm; /* seconds between reports */
57			extern float pctdone; /* percentage done */
58
59			extern int greyscale; /* map colors to brightness? */
60			extern char devname; / output device name */
61
62			extern int inform; /* input format */
63			extern int outform; /* output format */
64			extern char outvals; / output values */
65
66			extern VIEW ourview; /* viewing parameters */
67
68			extern int hresolu; /* horizontal resolution */
69			extern int vresolu; /* vertical resolution */
70
71			extern int psample; /* pixel sample size */
72			extern double maxdiff; /* max. sample difference */
73	greg	1.11	extern double dstrpix; /* square pixel distribution */
74	greg	1.1
75			extern double dstrsrc; /* square source distribution */
76	greg	1.11	extern double shadthresh; /* shadow threshold */
77	greg	1.15	extern double shadcert; /* shadow testing certainty */
78	greg	1.1
79			extern int maxdepth; /* maximum recursion depth */
80			extern double minweight; /* minimum ray weight */
81			extern long nrays; /* number of rays traced */
82
83			extern COLOR ambval; /* ambient value */
84			extern double ambacc; /* ambient accuracy */
85			extern int ambres; /* ambient resolution */
86			extern int ambdiv; /* ambient divisions */
87			extern int ambssamp; /* ambient super-samples */
88			extern int ambounce; /* ambient bounces */
89			extern char amblist[]; / ambient include/exclude list */
90			extern int ambincl; /* include == 1, exclude == 0 */
91
92
93			main(argc, argv)
94			int argc;
95			char *argv[];
96			{
97	greg	1.16	#define check(olen,narg) if (argv[i][olen] \|\| narg >= argc-i) goto badopt
98	greg	1.1	double atof();
99			char *getenv();
100			int report();
101			char *err;
102			char *recover = NULL;
103	greg	1.20	char *zfile = NULL;
104	greg	1.1	char *errfile = NULL;
105			char *ambfile = NULL;
106			char **amblp = amblist;
107			int loadflags = ~IO_FILES;
108	greg	1.4	int rval, gotvfile = 0;
109	greg	1.1	int i;
110			/* global program name */
111			progname = argv[0];
112			/* get library path */
113			if ((libpath = getenv(ULIBVAR)) == NULL)
114			libpath = DEFPATH;
115	greg	1.10	/* option city */
116	greg	1.1	for (i = 1; i < argc && argv[i][0] == '-'; i++) {
117	greg	1.18	if (!strcmp(argv[i], "-defaults") \|\|
118			!strcmp(argv[i], "-help")) {
119	greg	1.1	printdefaults();
120			quit(0);
121			}
122			#if RVIEW
123			if (!strcmp(argv[i], "-devices")) {
124			printdevices();
125			quit(0);
126			}
127			#endif
128	greg	1.21	#if RPICT\|RVIEW
129			rval = getviewopt(&ourview, argc-i, argv+i);
130			if (rval >= 0) {
131			i += rval;
132			continue;
133			}
134			#endif
135	greg	1.1	switch (argv[i][1]) {
136			#if RPICT\|RVIEW
137	greg	1.21	case 'v': /* view file */
138			if (argv[i][2] != 'f')
139	greg	1.10	goto badopt;
140	greg	1.21	check(3,1);
141			rval = viewfile(argv[++i], &ourview);
142			if (rval < 0) {
143			sprintf(errmsg,
144			"cannot open view file \"%s\"",
145			argv[i]);
146			error(SYSTEM, errmsg);
147			} else if (rval == 0) {
148			sprintf(errmsg,
149			"bad view file \"%s\"",
150			argv[i]);
151			error(USER, errmsg);
152			} else
153			gotvfile += rval;
154	greg	1.1	break;
155			#endif
156	greg	1.11	case 'd': /* direct */
157	greg	1.1	switch (argv[i][2]) {
158	greg	1.13	case 't': /* threshold */
159	greg	1.10	check(3,1);
160	greg	1.11	shadthresh = atof(argv[++i]);
161	greg	1.1	break;
162	greg	1.15	case 'c': /* certainty */
163			check(3,1);
164			shadcert = atof(argv[++i]);
165			break;
166	greg	1.11	case 'j': /* jitter */
167	greg	1.10	check(3,1);
168	greg	1.1	dstrsrc = atof(argv[++i]);
169			break;
170			default:
171	greg	1.10	goto badopt;
172	greg	1.1	}
173			break;
174			#if RPICT\|RVIEW
175			case 's': /* sample */
176			switch (argv[i][2]) {
177			case 'p': /* pixel */
178	greg	1.10	check(3,1);
179	greg	1.1	psample = atoi(argv[++i]);
180			break;
181	greg	1.13	case 't': /* threshold */
182	greg	1.10	check(3,1);
183	greg	1.1	maxdiff = atof(argv[++i]);
184			break;
185	greg	1.11	#if RPICT
186			case 'j': /* jitter */
187			check(3,1);
188			dstrpix = atof(argv[++i]);
189			break;
190			#endif
191	greg	1.1	default:
192	greg	1.10	goto badopt;
193	greg	1.1	}
194			break;
195			#endif
196			case 'x': /* x resolution */
197	greg	1.10	check(2,1);
198	greg	1.1	hresolu = atoi(argv[++i]);
199			break;
200			case 'y': /* y resolution */
201	greg	1.10	check(2,1);
202	greg	1.1	vresolu = atoi(argv[++i]);
203			break;
204			case 'w': /* warnings */
205	greg	1.10	check(2,0);
206	greg	1.1	wrnvec = wrnvec==NULL ? stderr_v : NULL;
207			break;
208			case 'e': /* error file */
209	greg	1.10	check(2,1);
210	greg	1.1	errfile = argv[++i];
211			break;
212			case 'l': /* limit */
213			switch (argv[i][2]) {
214			case 'r': /* recursion */
215	greg	1.10	check(3,1);
216	greg	1.1	maxdepth = atoi(argv[++i]);
217			break;
218			case 'w': /* weight */
219	greg	1.10	check(3,1);
220	greg	1.1	minweight = atof(argv[++i]);
221			break;
222			default:
223	greg	1.10	goto badopt;
224	greg	1.1	}
225			break;
226			#if RPICT
227	greg	1.20	case 'z': /* z file */
228			check(2,1);
229			zfile = argv[++i];
230			break;
231	greg	1.1	case 'r': /* recover file */
232	greg	1.10	check(2,1);
233	greg	1.1	recover = argv[++i];
234	greg	1.4	rval = viewfile(recover, &ourview);
235	greg	1.5	if (rval <= 0) {
236			sprintf(errmsg,
237			"cannot recover view parameters from \"%s\"", recover);
238			error(WARNING, errmsg);
239			} else
240	greg	1.4	gotvfile += rval;
241	greg	1.1	break;
242			case 't': /* timer */
243	greg	1.10	check(2,1);
244	greg	1.1	ralrm = atoi(argv[++i]);
245			break;
246			#endif
247			case 'a': /* ambient */
248			switch (argv[i][2]) {
249			case 'v': /* value */
250	greg	1.10	check(3,3);
251	greg	1.1	setcolor(ambval, atof(argv[i+1]),
252			atof(argv[i+2]),
253			atof(argv[i+3]));
254			i += 3;
255			break;
256			case 'a': /* accuracy */
257	greg	1.10	check(3,1);
258	greg	1.1	ambacc = atof(argv[++i]);
259			break;
260			case 'r': /* resolution */
261	greg	1.10	check(3,1);
262	greg	1.1	ambres = atoi(argv[++i]);
263			break;
264			case 'd': /* divisions */
265	greg	1.10	check(3,1);
266	greg	1.1	ambdiv = atoi(argv[++i]);
267			break;
268			case 's': /* super-samp */
269	greg	1.10	check(3,1);
270	greg	1.1	ambssamp = atoi(argv[++i]);
271			break;
272			case 'b': /* bounces */
273	greg	1.10	check(3,1);
274	greg	1.1	ambounce = atoi(argv[++i]);
275			break;
276			case 'i': /* include */
277	greg	1.10	check(3,1);
278	greg	1.1	if (ambincl != 1) {
279			ambincl = 1;
280			amblp = amblist;
281			}
282			*amblp++ = argv[++i];
283			break;
284			case 'e': /* exclude */
285	greg	1.10	check(3,1);
286	greg	1.1	if (ambincl != 0) {
287			ambincl = 0;
288			amblp = amblist;
289			}
290			*amblp++ = argv[++i];
291			break;
292			case 'f': /* file */
293	greg	1.10	check(3,1);
294	greg	1.1	ambfile= argv[++i];
295			break;
296			default:
297	greg	1.10	goto badopt;
298	greg	1.1	}
299			break;
300			#if RTRACE
301			case 'f': /* format i/o */
302			switch (argv[i][2]) {
303			case 'a': /* ascii */
304			case 'f': /* float */
305			case 'd': /* double */
306			inform = argv[i][2];
307			break;
308			default:
309	greg	1.10	goto badopt;
310	greg	1.1	}
311			switch (argv[i][3]) {
312			case '\0':
313			outform = inform;
314			break;
315			case 'a': /* ascii */
316			case 'f': /* float */
317			case 'd': /* double */
318	greg	1.12	check(4,0);
319	greg	1.1	outform = argv[i][3];
320			break;
321			default:
322	greg	1.10	goto badopt;
323	greg	1.1	}
324			break;
325			case 'o': /* output */
326			outvals = argv[i]+2;
327			break;
328	greg	1.6	case 'h': /* toggle header */
329	greg	1.10	check(2,0);
330	greg	1.6	loadflags ^= IO_INFO;
331	greg	1.1	break;
332			#endif
333			#if RVIEW
334			case 'b': /* black and white */
335	greg	1.10	check(2,0);
336	greg	1.1	greyscale = !greyscale;
337			break;
338			case 'o': /* output device */
339	greg	1.10	check(2,1);
340	greg	1.1	devname = argv[++i];
341			break;
342			#endif
343			default:
344	greg	1.19	goto badopt;
345	greg	1.1	}
346			}
347			#if RPICT\|RVIEW
348			err = setview(&ourview); /* set viewing parameters */
349			if (err != NULL)
350			error(USER, err);
351			#endif
352			/* set up signal handling */
353			sigdie(SIGINT, "Interrupt");
354			sigdie(SIGHUP, "Hangup");
355			sigdie(SIGTERM, "Terminate");
356			sigdie(SIGPIPE, "Broken pipe");
357			#ifdef SIGXCPU
358			sigdie(SIGXCPU, "CPU limit exceeded");
359			sigdie(SIGXFSZ, "File size exceeded");
360			#endif
361			#if RPICT
362			signal(SIGALRM, report);
363			#else
364			sigdie(SIGALRM, "Alarm clock");
365			#endif
366			/* open error file */
367			if (errfile != NULL) {
368			if (freopen(errfile, "a", stderr) == NULL)
369	greg	1.14	quit(2);
370	greg	1.1	fprintf(stderr, "************\n* PID %5d: ",
371			getpid());
372			printargs(argc, argv, stderr);
373			fputs("\n", stderr);
374			fflush(stderr);
375			}
376			#ifdef NICE
377			nice(NICE); /* lower priority */
378			#endif
379	greg	1.19	/* get octree */
380	greg	1.1	#if RVIEW
381			loadflags &= ~IO_INFO;
382			#endif
383			if (i == argc)
384	greg	1.19	octname = NULL;
385			else if (i == argc-1)
386			octname = argv[i];
387	greg	1.1	else
388	greg	1.19	goto badopt;
389			#if RVIEW\|RTRACE
390			if (octname == NULL)
391			error(USER, "missing octree argument");
392	greg	1.1	#endif
393	greg	1.19	readoct(octname, loadflags, &thescene, NULL);
394	greg	1.1
395			if (loadflags & IO_INFO) { /* print header */
396			printargs(i, argv, stdout);
397			#if RPICT
398			if (gotvfile) {
399			printf(VIEWSTR);
400			fprintview(&ourview, stdout);
401			printf("\n");
402			}
403			#endif
404			printf("\n");
405			}
406
407			marksources(); /* find and mark sources */
408
409			amblp = NULL; / initialize ambient calculation */
410			setambient(ambfile);
411
412			#if RPICT
413			if (ralrm > 0) /* report init time */
414			report();
415	greg	1.20	render(zfile, recover); /* render the scene */
416	greg	1.1	#endif
417			#if RTRACE
418			rtrace(NULL); /* trace rays from stdin */
419			#endif
420			#if RVIEW
421			rview(); /* go */
422			#endif
423			quit(0);
424	greg	1.19
425			badopt:
426			sprintf(errmsg, "command line error at '%s'", argv[i]);
427			error(USER, errmsg);
428
429	greg	1.10	#undef check
430	greg	1.1	}
431
432
433			eputs(s) /* error output */
434			char *s;
435			{
436			if (errvec != NULL)
437			(*errvec)(s);
438			}
439
440
441			wputs(s) /* warning output */
442			char *s;
443			{
444			if (wrnvec != NULL)
445			(*wrnvec)(s);
446			}
447
448
449			cputs(s) /* command error output */
450			char *s;
451			{
452			if (cmdvec != NULL)
453			(*cmdvec)(s);
454			}
455
456
457			stderr_v(s) /* put string to stderr */
458			register char *s;
459			{
460			static int inline = 0;
461
462			if (!inline++) {
463			fputs(progname, stderr);
464			fputs(": ", stderr);
465			}
466			fputs(s, stderr);
467			if (*s && s[strlen(s)-1] == '\n') {
468			fflush(stderr);
469			inline = 0;
470			}
471			}
472
473
474			onsig(signo) /* fatal signal */
475			int signo;
476			{
477	greg	1.8	static int gotsig = 0;
478
479			if (gotsig++) /* two signals and we're gone! */
480	greg	1.9	_exit(signo);
481	greg	1.8
482	greg	1.1	eputs("signal - ");
483			eputs(sigerr[signo]);
484			eputs("\n");
485	greg	1.14	quit(3);
486	greg	1.1	}
487
488
489			sigdie(signo, msg) /* set fatal signal */
490			int signo;
491			char *msg;
492			{
493			if (signal(signo, onsig) == SIG_IGN)
494			signal(signo, SIG_IGN);
495			sigerr[signo] = msg;
496			}
497
498
499			printdefaults() /* print default values to stdout */
500			{
501			register char *cp;
502
503			#if RPICT\|RVIEW
504	greg	1.7	printf("-vt%c\t\t\t\t# view type %s\n", ourview.type,
505	greg	1.1	ourview.type==VT_PER ? "perspective" :
506			ourview.type==VT_PAR ? "parallel" :
507			"unknown");
508			printf("-vp %f %f %f\t# view point\n",
509			ourview.vp[0], ourview.vp[1], ourview.vp[2]);
510			printf("-vd %f %f %f\t# view direction\n",
511			ourview.vdir[0], ourview.vdir[1], ourview.vdir[2]);
512			printf("-vu %f %f %f\t# view up\n",
513			ourview.vup[0], ourview.vup[1], ourview.vup[2]);
514			printf("-vh %f\t\t\t# view horizontal size\n", ourview.horiz);
515			printf("-vv %f\t\t\t# view vertical size\n", ourview.vert);
516	greg	1.21	printf("-vs %f\t\t\t# view shift\n", ourview.hoff);
517			printf("-vl %f\t\t\t# view lift\n", ourview.voff);
518	greg	1.1	#endif
519			printf("-x %-9d\t\t\t# x resolution\n", hresolu);
520			printf("-y %-9d\t\t\t# y resolution\n", vresolu);
521	greg	1.13	printf("-dt %f\t\t\t# direct threshold\n", shadthresh);
522	greg	1.15	printf("-dc %f\t\t\t# direct certainty\n", shadcert);
523	greg	1.11	printf("-dj %f\t\t\t# direct jitter\n", dstrsrc);
524	greg	1.1	#if RPICT\|RVIEW
525			printf("-sp %-9d\t\t\t# sample pixel\n", psample);
526	greg	1.13	printf("-st %f\t\t\t# sample threshold\n", maxdiff);
527	greg	1.11	#if RPICT
528			printf("-sj %f\t\t\t# sample jitter\n", dstrpix);
529			#endif
530	greg	1.1	#endif
531			printf("-av %f %f %f\t# ambient value\n", colval(ambval,RED),
532			colval(ambval,GRN), colval(ambval, BLU));
533			printf("-ab %-9d\t\t\t# ambient bounces\n", ambounce);
534			printf("-aa %f\t\t\t# ambient accuracy\n", ambacc);
535			printf("-ar %-9d\t\t\t# ambient resolution\n", ambres);
536			printf("-ad %-9d\t\t\t# ambient divisions\n", ambdiv);
537			printf("-as %-9d\t\t\t# ambient super-samples\n", ambssamp);
538			printf("-lr %-9d\t\t\t# limit reflection\n", maxdepth);
539			printf("-lw %f\t\t\t# limit weight\n", minweight);
540			#if RPICT
541			printf("-t %-9d\t\t\t# time between reports\n", ralrm);
542			#endif
543			#if RVIEW
544			printf("-o %s\t\t\t\t# output device\n", devname);
545			#endif
546			#if RTRACE
547			printf("-f%c%c\t\t\t\t# format input/output = %s/%s\n",
548			inform, outform,
549			inform=='a' ? "ascii" :
550			inform=='f' ? "float" : "double",
551			outform=='a' ? "ascii" :
552			outform=='f' ? "float" : "double");
553			printf("-o%s\t\t\t\t# output", outvals);
554			for (cp = outvals; *cp; cp++)
555			switch (*cp) {
556			case 'i': printf(" irradiance"); break;
557			case 't': printf(" trace"); break;
558			case 'o': printf(" origin"); break;
559			case 'd': printf(" direction"); break;
560			case 'v': printf(" value"); break;
561			case 'l': printf(" length"); break;
562			case 'p': printf(" point"); break;
563			case 'n': printf(" normal"); break;
564			case 's': printf(" surface"); break;
565			case 'w': printf(" weight"); break;
566			case 'm': printf(" modifier"); break;
567			}
568			printf("\n");
569			#endif
570			}