src/gen/mkillum.c

/* Copyright (c) 1991 Regents of the University of California */

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

/*
 * Make illum sources for optimizing rendering process
 */

#include  "mkillum.h"

#include  <signal.h>

#include  <ctype.h>

                                /* default parameters */
#define  SAMPDENS       48              /* points per projected steradian */
#define  NSAMPS         32              /* samples per point */
#define  DFLMAT         "illum_mat"     /* material name */
                                /* selection options */
#define  S_NONE         0               /* select none */
#define  S_ELEM         1               /* select specified element */
#define  S_COMPL        2               /* select all but element */
#define  S_ALL          3               /* select all */

                                /* rtrace command and defaults */
char  *rtargv[64] = { "rtrace", "-dj", ".25", "-dr", "3", "-di+",
                "-ab", "2", "-ad", "256", "-as", "128", "-aa", ".15", };
int  rtargc = 14;
                                /* overriding rtrace options */
char  *myrtopts[] = { "-I-", "-i-", "-ov", "-h-", "-fff", NULL };

struct rtproc   rt;             /* our rtrace process */

struct illum_args  thisillum = {        /* our illum and default values */
                0,
                DFLMAT,
                DFLMAT,
                0,
                VOIDID,
                SAMPDENS,
                NSAMPS,
        };

char    matcheck[MAXSTR];       /* current material to include or exclude */
int     matselect = S_ALL;      /* selection criterion */

FUN     ofun[NUMOTYPE] = INIT_OTYPE;    /* object types */

int     gargc;                  /* global argc */
char    **gargv;                /* global argv */
#define  progname       gargv[0]

int     doneheader = 0;         /* printed header yet? */
#define  checkhead()    if (!doneheader++) printhead(gargc,gargv)

int     warnings = 1;           /* print warnings? */

extern char     *fgetline(), *fgetword(), *sskip(), 
                *atos(), *iskip(), *fskip(), *strcpy();
extern FILE     *popen();


main(argc, argv)                /* compute illum distributions using rtrace */
int     argc;
char    *argv[];
{
        extern char     *getenv(), *getpath();
        char    *rtpath;
        FILE    *fp;
        register int    i;
                                /* set global arguments */
        gargv = argv;
                                /* set up rtrace command */
        for (i = 1; i < argc; i++) {
                if (argv[i][0] == '<' && !argv[i][1])
                        break;
                rtargv[rtargc++] = argv[i];
                if (argv[i][0] == '-' && argv[i][1] == 'w')
                        warnings = !warnings;
        }
        if ((gargc = i) < 2)
                error(USER, "too few arguments");
        rtargc--;
        for (i = 0; myrtopts[i] != NULL; i++)
                rtargv[rtargc++] = myrtopts[i];
        rtargv[rtargc++] = argv[gargc-1];
        rtargv[rtargc] = NULL;
                                /* just asking for defaults? */
        if (!strcmp(argv[gargc-1], "-defaults")) {
                printopts(); fflush(stdout);
                rtpath = getpath(rtargv[0], getenv("PATH"), X_OK);
                if (rtpath == NULL) {
                        eputs(rtargv[0]);
                        eputs(": command not found\n");
                        exit(1);
                }
                execv(rtpath, rtargv);
                perror(rtpath);
                exit(1);
        }
                                /* else initialize and run our calculation */
        init();
        if (gargc+1 < argc)
                for (i = gargc+1; i < argc; i++) {
                        if ((fp = fopen(argv[i], "r")) == NULL) {
                                sprintf(errmsg,
                                "cannot open scene file \"%s\"", argv[i]);
                                error(SYSTEM, errmsg);
                        }
                        filter(fp, argv[i]);
                        fclose(fp);
                }
        else
                filter(stdin, "standard input");
        quit(0);
}


quit(status)                    /* exit with status */
int  status;
{
        int     rtstat;

        rtstat = close_process(rt.pd);
        if (status == 0)
                if (rtstat < 0)
                        error(WARNING,
                        "unknown return status from rtrace process");
                else
                        status = rtstat;
        exit(status);
}


init()                          /* start rtrace and set up buffers */
{
        extern int  o_face(), o_sphere(), o_ring();
        int     maxbytes;
                                        /* set up object functions */
        ofun[OBJ_FACE].funp = o_face;
        ofun[OBJ_SPHERE].funp = o_sphere;
        ofun[OBJ_RING].funp = o_ring;
                                        /* set up signal handling */
        signal(SIGPIPE, quit);
                                        /* start rtrace process */
        maxbytes = open_process(rt.pd, rtargv);
        if (maxbytes == 0) {
                eputs(rtargv[0]);
                eputs(": command not found\n");
                exit(1);
        }
        if (maxbytes < 0)
                error(SYSTEM, "cannot start rtrace process");
        rt.bsiz = maxbytes/(6*sizeof(float));
        rt.buf = (float *)malloc(6*sizeof(float)*rt.bsiz--);
        rt.dest = (float **)malloc(sizeof(float *)*rt.bsiz);
        if (rt.buf == NULL || rt.dest == NULL)
                error(SYSTEM, "out of memory in init");
        rt.nrays = 0;
                                        /* set up urand */
        initurand(2048);
}


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

        if (!*s) return;
        if (!midline) {
                fputs(progname, stderr);
                fputs(": ", stderr);
        }
        fputs(s, stderr);
        midline = s[strlen(s)-1] != '\n';
}


wputs(s)                        /* print warning if enabled */
char  *s;
{
        if (warnings)
                eputs(s);
}


filter(infp, name)              /* process stream */
register FILE   *infp;
char    *name;
{
        char    buf[512];
        FILE    *pfp;
        register int    c;

        while ((c = getc(infp)) != EOF) {
                if (isspace(c))
                        continue;
                if (c == '#') {                         /* comment/options */
                        buf[0] = c;
                        fgets(buf+1, sizeof(buf)-1, infp);
                        xoptions(buf, name);
                } else if (c == '!') {                  /* command */
                        buf[0] = c;
                        fgetline(buf+1, sizeof(buf)-1, infp);
                        if ((pfp = popen(buf+1, "r")) == NULL) {
                                sprintf(errmsg, "cannot execute \"%s\"", buf);
                                error(SYSTEM, errmsg);
                        }
                        filter(pfp, buf);
                        pclose(pfp);
                } else {                                /* object */
                        ungetc(c, infp);
                        xobject(infp, name);
                }
        }
}


xoptions(s, nm)                 /* process options in string s */
char    *s;
char    *nm;
{
        extern FILE     *freopen();
        char    buf[64];
        int     nerrs = 0;
        register char   *cp;

        if (strncmp(s, "#@mkillum", 9) || !isspace(s[9])) {
                fputs(s, stdout);               /* not for us */
                return;
        }
        cp = s+10;
        while (*cp) {
                switch (*cp) {
                case ' ':
                case '\t':
                case '\n':
                        cp++;
                        continue;
                case 'm':                       /* material name */
                        if (*++cp != '=')
                                break;
                        if (!*++cp)
                                break;
                        atos(thisillum.matname, MAXSTR, cp);
                        cp = sskip(cp);
                        if (!(thisillum.flags & IL_DATCLB)) {
                                strcpy(thisillum.datafile, thisillum.matname);
                                thisillum.dfnum = 0;
                        }
                        continue;
                case 'f':                       /* data file name */
                        if (*++cp != '=')
                                break;
                        if (!*++cp) {
                                strcpy(thisillum.datafile,thisillum.matname);
                                thisillum.flags &= ~IL_DATCLB;
                                continue;
                        }
                        atos(thisillum.datafile, MAXSTR, cp);
                        cp = sskip(cp);
                        thisillum.dfnum = 0;
                        thisillum.flags |= IL_DATCLB;
                        continue;
                case 'i':                       /* include material */
                case 'e':                       /* exclude material */
                        if (cp[1] != '=')
                                break;
                        matselect = (*cp == 'i') ? S_ELEM : S_COMPL;
                        cp += 2;
                        atos(matcheck, MAXSTR, cp);
                        cp = sskip(cp);
                        continue;
                case 'a':                       /* use everything */
                        cp = sskip(cp);
                        matselect = S_ALL;
                        continue;
                case 'n':                       /* use nothing (passive) */
                        cp = sskip(cp);
                        matselect = S_NONE;
                        continue;
                case 'c':                       /* color calculation */
                        if (*++cp != '=')
                                break;
                        switch (*++cp) {
                        case 'a':                       /* average */
                                thisillum.flags = (thisillum.flags|IL_COLAVG)
                                                        & ~IL_COLDST;
                                break;
                        case 'd':                       /* distribution */
                                thisillum.flags |= (IL_COLDST|IL_COLAVG);
                                break;
                        case 'n':                       /* none */
                                thisillum.flags &= ~(IL_COLAVG|IL_COLDST);
                                break;
                        default:
                                goto opterr;
                        }
                        cp = sskip(cp);
                        continue;
                case 'd':                       /* point sample density */
                        if (*++cp != '=')
                                break;
                        if (!isintd(++cp, " \t\n"))
                                break;
                        thisillum.sampdens = atoi(cp);
                        cp = sskip(cp);
                        continue;
                case 's':                       /* point super-samples */
                        if (*++cp != '=')
                                break;
                        if (!isintd(++cp, " \t\n"))
                                break;
                        thisillum.nsamps = atoi(cp);
                        cp = sskip(cp);
                        continue;
                case 'l':                       /* light sources */
                        cp++;
                        if (*cp == '+')
                                thisillum.flags |= IL_LIGHT;
                        else if (*cp == '-')
                                thisillum.flags &= ~IL_LIGHT;
                        else
                                break;
                        cp++;
                        continue;
                case 'o':                       /* output file */
                        if (*++cp != '=')
                                break;
                        if (!*++cp)
                                break;
                        atos(buf, sizeof(buf), cp);
                        cp = sskip(cp);
                        if (freopen(buf, "w", stdout) == NULL) {
                                sprintf(errmsg,
                                "cannot open output file \"%s\"", buf);
                                error(SYSTEM, errmsg);
                        }
                        doneheader = 0;
                        continue;
                case '!':                       /* processed file! */
                        sprintf(errmsg, "(%s): already processed!", nm);
                        error(WARNING, errmsg);
                        matselect = S_NONE;
                        return;
                }
        opterr:                                 /* skip faulty option */
                cp = sskip(cp);
                nerrs++;
        }
                                                /* print header? */
        checkhead();
                                                /* issue warnings? */
        if (nerrs) {
                sprintf(errmsg, "(%s): %d error(s) in option line:",
                                nm, nerrs);
                error(WARNING, errmsg);
                wputs(s);
                printf("# %s: the following option line has %d error(s):\n",
                                progname, nerrs);
        }
                                                /* print pure comment */
        printf("# %s", s+2);
}


printopts()                     /* print out option default values */
{
        printf("m=%s\t\t\t# material name\n", thisillum.matname);
        printf("f=%s\t\t\t# data file name\n", thisillum.datafile);
        printf("c=n\t\t\t\t# color none\n");
        printf("d=%d\t\t\t\t# density of points\n", thisillum.sampdens);
        printf("s=%d\t\t\t\t# samples per point\n", thisillum.nsamps);
}


printhead(ac, av)                       /* print out header */
register int  ac;
register char  **av;
{
        putchar('#');
        while (ac-- > 0) {
                putchar(' ');
                fputs(*av++, stdout);
        }
        fputs("\n#@mkillum !\n", stdout);
}


xobject(fp, nm)                         /* translate an object from fp */
FILE  *fp;
char  *nm;
{
        OBJREC  thisobj;
        char  str[MAXSTR];
        int  doit;
                                        /* read the object */
        if (fgetword(thisillum.altmat, MAXSTR, fp) == NULL)
                goto readerr;
        if (fgetword(str, MAXSTR, fp) == NULL)
                goto readerr;
                                        /* is it an alias? */
        if (!strcmp(str, ALIASID)) {
                if (fgetword(str, MAXSTR, fp) == NULL)
                        goto readerr;
                printf("\n%s %s %s", thisillum.altmat, ALIASID, str);
                if (fgetword(str, MAXSTR, fp) == NULL)
                        goto readerr;
                printf("\t%s\n", str);
                return;
        }
        thisobj.omod = OVOID;           /* unused field */
        if ((thisobj.otype = otype(str)) < 0) {
                sprintf(errmsg, "(%s): unknown type \"%s\"", nm, str);
                error(USER, errmsg);
        }
        if (fgetword(str, MAXSTR, fp) == NULL)
                goto readerr;
        thisobj.oname = str;
        if (readfargs(&thisobj.oargs, fp) != 1)
                goto readerr;
        thisobj.os = NULL;
                                        /* check for translation */
        switch (matselect) {
        case S_NONE:
                doit = 0;
                break;
        case S_ALL:
                doit = 1;
                break;
        case S_ELEM:
                doit = !strcmp(thisillum.altmat, matcheck);
                break;
        case S_COMPL:
                doit = strcmp(thisillum.altmat, matcheck);
                break;
        }
        doit = doit && issurface(thisobj.otype);
                                                /* print header? */
        checkhead();
                                                /* process object */
        if (doit)
                (*ofun[thisobj.otype].funp)(&thisobj, &thisillum, &rt, nm);
        else
                printobj(thisillum.altmat, &thisobj);
                                                /* free arguments */
        freefargs(&thisobj.oargs);
        return;
readerr:
        sprintf(errmsg, "(%s): error reading scene", nm);
        error(USER, errmsg);
}
Revision:	1.9
Committed:	Thu Jul 25 15:31:30 1991 UTC (34 years, 3 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.8:	+11 -0 lines
Log Message:	added variable settings to -defaults printing
#	User	Rev	Content
1	greg	1.1	/* Copyright (c) 1991 Regents of the University of California */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* Make illum sources for optimizing rendering process
9			*/
10
11	greg	1.2	#include "mkillum.h"
12	greg	1.1
13	greg	1.3	#include <signal.h>
14
15	greg	1.2	#include <ctype.h>
16	greg	1.1
17			/* default parameters */
18	greg	1.8	#define SAMPDENS 48 /* points per projected steradian */
19	greg	1.1	#define NSAMPS 32 /* samples per point */
20			#define DFLMAT "illum_mat" /* material name */
21			/* selection options */
22			#define S_NONE 0 /* select none */
23			#define S_ELEM 1 /* select specified element */
24			#define S_COMPL 2 /* select all but element */
25			#define S_ALL 3 /* select all */
26
27			/* rtrace command and defaults */
28	greg	1.4	char *rtargv[64] = { "rtrace", "-dj", ".25", "-dr", "3", "-di+",
29			"-ab", "2", "-ad", "256", "-as", "128", "-aa", ".15", };
30			int rtargc = 14;
31	greg	1.1	/* overriding rtrace options */
32	greg	1.4	char *myrtopts[] = { "-I-", "-i-", "-ov", "-h-", "-fff", NULL };
33	greg	1.1
34	greg	1.2	struct rtproc rt; /* our rtrace process */
35	greg	1.1
36	greg	1.2	struct illum_args thisillum = { /* our illum and default values */
37			0,
38			DFLMAT,
39			DFLMAT,
40			0,
41			VOIDID,
42	greg	1.3	SAMPDENS,
43	greg	1.2	NSAMPS,
44			};
45	greg	1.1
46			char matcheck[MAXSTR]; /* current material to include or exclude */
47			int matselect = S_ALL; /* selection criterion */
48
49	greg	1.2	FUN ofun[NUMOTYPE] = INIT_OTYPE; /* object types */
50	greg	1.1
51			int gargc; /* global argc */
52			char *gargv; / global argv */
53			#define progname gargv[0]
54
55			int doneheader = 0; /* printed header yet? */
56	greg	1.2	#define checkhead() if (!doneheader++) printhead(gargc,gargv)
57	greg	1.1
58	greg	1.2	int warnings = 1; /* print warnings? */
59
60	greg	1.1	extern char fgetline(), fgetword(), *sskip(),
61	greg	1.6	atos(), iskip(), fskip(), strcpy();
62	greg	1.1	extern FILE *popen();
63
64
65			main(argc, argv) /* compute illum distributions using rtrace */
66			int argc;
67			char *argv[];
68			{
69			extern char getenv(), getpath();
70			char *rtpath;
71	greg	1.3	FILE *fp;
72	greg	1.1	register int i;
73			/* set global arguments */
74	greg	1.3	gargv = argv;
75	greg	1.1	/* set up rtrace command */
76	greg	1.3	for (i = 1; i < argc; i++) {
77			if (argv[i][0] == '<' && !argv[i][1])
78			break;
79	greg	1.1	rtargv[rtargc++] = argv[i];
80	greg	1.2	if (argv[i][0] == '-' && argv[i][1] == 'w')
81			warnings = !warnings;
82			}
83	greg	1.3	if ((gargc = i) < 2)
84			error(USER, "too few arguments");
85			rtargc--;
86	greg	1.1	for (i = 0; myrtopts[i] != NULL; i++)
87			rtargv[rtargc++] = myrtopts[i];
88	greg	1.3	rtargv[rtargc++] = argv[gargc-1];
89	greg	1.1	rtargv[rtargc] = NULL;
90			/* just asking for defaults? */
91	greg	1.3	if (!strcmp(argv[gargc-1], "-defaults")) {
92	greg	1.9	printopts(); fflush(stdout);
93	greg	1.1	rtpath = getpath(rtargv[0], getenv("PATH"), X_OK);
94			if (rtpath == NULL) {
95			eputs(rtargv[0]);
96			eputs(": command not found\n");
97			exit(1);
98			}
99			execv(rtpath, rtargv);
100			perror(rtpath);
101			exit(1);
102			}
103			/* else initialize and run our calculation */
104			init();
105	greg	1.3	if (gargc+1 < argc)
106			for (i = gargc+1; i < argc; i++) {
107	greg	1.5	if ((fp = fopen(argv[i], "r")) == NULL) {
108	greg	1.3	sprintf(errmsg,
109			"cannot open scene file \"%s\"", argv[i]);
110			error(SYSTEM, errmsg);
111			}
112			filter(fp, argv[i]);
113			fclose(fp);
114			}
115			else
116			filter(stdin, "standard input");
117	greg	1.2	quit(0);
118	greg	1.1	}
119
120
121	greg	1.3	quit(status) /* exit with status */
122			int status;
123			{
124			int rtstat;
125
126			rtstat = close_process(rt.pd);
127			if (status == 0)
128			if (rtstat < 0)
129			error(WARNING,
130			"unknown return status from rtrace process");
131			else
132			status = rtstat;
133			exit(status);
134			}
135
136
137	greg	1.1	init() /* start rtrace and set up buffers */
138			{
139	greg	1.4	extern int o_face(), o_sphere(), o_ring();
140	greg	1.1	int maxbytes;
141	greg	1.3	/* set up object functions */
142			ofun[OBJ_FACE].funp = o_face;
143	greg	1.4	ofun[OBJ_SPHERE].funp = o_sphere;
144	greg	1.3	ofun[OBJ_RING].funp = o_ring;
145			/* set up signal handling */
146			signal(SIGPIPE, quit);
147			/* start rtrace process */
148	greg	1.2	maxbytes = open_process(rt.pd, rtargv);
149	greg	1.1	if (maxbytes == 0) {
150			eputs(rtargv[0]);
151			eputs(": command not found\n");
152			exit(1);
153			}
154			if (maxbytes < 0)
155			error(SYSTEM, "cannot start rtrace process");
156	greg	1.2	rt.bsiz = maxbytes/(6*sizeof(float));
157	greg	1.4	rt.buf = (float )malloc(6sizeof(float)*rt.bsiz--);
158			rt.dest = (float *)malloc(sizeof(float )*rt.bsiz);
159			if (rt.buf == NULL \|\| rt.dest == NULL)
160	greg	1.1	error(SYSTEM, "out of memory in init");
161	greg	1.2	rt.nrays = 0;
162	greg	1.6	/* set up urand */
163			initurand(2048);
164	greg	1.1	}
165
166
167			eputs(s) /* put string to stderr */
168			register char *s;
169			{
170			static int midline = 0;
171
172			if (!*s) return;
173			if (!midline) {
174			fputs(progname, stderr);
175			fputs(": ", stderr);
176			}
177			fputs(s, stderr);
178			midline = s[strlen(s)-1] != '\n';
179			}
180
181
182	greg	1.2	wputs(s) /* print warning if enabled */
183			char *s;
184			{
185			if (warnings)
186			eputs(s);
187			}
188
189
190			filter(infp, name) /* process stream */
191	greg	1.1	register FILE *infp;
192			char *name;
193			{
194			char buf[512];
195			FILE *pfp;
196			register int c;
197
198			while ((c = getc(infp)) != EOF) {
199			if (isspace(c))
200			continue;
201			if (c == '#') { /* comment/options */
202			buf[0] = c;
203			fgets(buf+1, sizeof(buf)-1, infp);
204	greg	1.2	xoptions(buf, name);
205	greg	1.1	} else if (c == '!') { /* command */
206			buf[0] = c;
207			fgetline(buf+1, sizeof(buf)-1, infp);
208			if ((pfp = popen(buf+1, "r")) == NULL) {
209			sprintf(errmsg, "cannot execute \"%s\"", buf);
210			error(SYSTEM, errmsg);
211			}
212	greg	1.2	filter(pfp, buf);
213	greg	1.1	pclose(pfp);
214			} else { /* object */
215			ungetc(c, infp);
216			xobject(infp, name);
217			}
218			}
219			}
220
221
222	greg	1.2	xoptions(s, nm) /* process options in string s */
223	greg	1.1	char *s;
224			char *nm;
225			{
226			extern FILE *freopen();
227			char buf[64];
228			int nerrs = 0;
229			register char *cp;
230
231	greg	1.2	if (strncmp(s, "#@mkillum", 9) \|\| !isspace(s[9])) {
232			fputs(s, stdout); /* not for us */
233	greg	1.1	return;
234	greg	1.2	}
235	greg	1.1	cp = s+10;
236			while (*cp) {
237			switch (*cp) {
238			case ' ':
239			case '\t':
240			case '\n':
241			cp++;
242			continue;
243			case 'm': /* material name */
244	greg	1.2	if (*++cp != '=')
245	greg	1.1	break;
246	greg	1.2	if (!*++cp)
247			break;
248	greg	1.1	atos(thisillum.matname, MAXSTR, cp);
249			cp = sskip(cp);
250			if (!(thisillum.flags & IL_DATCLB)) {
251			strcpy(thisillum.datafile, thisillum.matname);
252			thisillum.dfnum = 0;
253			}
254			continue;
255			case 'f': /* data file name */
256	greg	1.2	if (*++cp != '=')
257	greg	1.1	break;
258	greg	1.2	if (!*++cp) {
259	greg	1.6	strcpy(thisillum.datafile,thisillum.matname);
260	greg	1.1	thisillum.flags &= ~IL_DATCLB;
261			continue;
262			}
263			atos(thisillum.datafile, MAXSTR, cp);
264			cp = sskip(cp);
265			thisillum.dfnum = 0;
266			thisillum.flags \|= IL_DATCLB;
267			continue;
268			case 'i': /* include material */
269			case 'e': /* exclude material */
270	greg	1.6	if (cp[1] != '=')
271	greg	1.1	break;
272	greg	1.7	matselect = (*cp == 'i') ? S_ELEM : S_COMPL;
273			cp += 2;
274			atos(matcheck, MAXSTR, cp);
275	greg	1.1	cp = sskip(cp);
276			continue;
277			case 'a': /* use everything */
278			cp = sskip(cp);
279			matselect = S_ALL;
280			continue;
281			case 'n': /* use nothing (passive) */
282			cp = sskip(cp);
283			matselect = S_NONE;
284			continue;
285			case 'c': /* color calculation */
286	greg	1.2	if (*++cp != '=')
287	greg	1.1	break;
288	greg	1.2	switch (*++cp) {
289	greg	1.1	case 'a': /* average */
290	greg	1.6	thisillum.flags = (thisillum.flags\|IL_COLAVG)
291			& ~IL_COLDST;
292	greg	1.1	break;
293			case 'd': /* distribution */
294	greg	1.5	thisillum.flags \|= (IL_COLDST\|IL_COLAVG);
295	greg	1.1	break;
296			case 'n': /* none */
297			thisillum.flags &= ~(IL_COLAVG\|IL_COLDST);
298			break;
299			default:
300			goto opterr;
301			}
302			cp = sskip(cp);
303			continue;
304			case 'd': /* point sample density */
305	greg	1.2	if (*++cp != '=')
306	greg	1.1	break;
307	greg	1.2	if (!isintd(++cp, " \t\n"))
308	greg	1.1	break;
309	greg	1.3	thisillum.sampdens = atoi(cp);
310	greg	1.1	cp = sskip(cp);
311			continue;
312			case 's': /* point super-samples */
313	greg	1.2	if (*++cp != '=')
314	greg	1.1	break;
315	greg	1.2	if (!isintd(++cp, " \t\n"))
316	greg	1.1	break;
317			thisillum.nsamps = atoi(cp);
318			cp = sskip(cp);
319			continue;
320	greg	1.3	case 'l': /* light sources */
321	greg	1.4	cp++;
322			if (*cp == '+')
323	greg	1.3	thisillum.flags \|= IL_LIGHT;
324	greg	1.4	else if (*cp == '-')
325			thisillum.flags &= ~IL_LIGHT;
326	greg	1.3	else
327	greg	1.4	break;
328			cp++;
329	greg	1.3	continue;
330	greg	1.1	case 'o': /* output file */
331	greg	1.2	if (*++cp != '=')
332	greg	1.1	break;
333	greg	1.2	if (!*++cp)
334			break;
335	greg	1.1	atos(buf, sizeof(buf), cp);
336			cp = sskip(cp);
337			if (freopen(buf, "w", stdout) == NULL) {
338			sprintf(errmsg,
339			"cannot open output file \"%s\"", buf);
340			error(SYSTEM, errmsg);
341			}
342			doneheader = 0;
343			continue;
344	greg	1.6	case '!': /* processed file! */
345	greg	1.7	sprintf(errmsg, "(%s): already processed!", nm);
346	greg	1.6	error(WARNING, errmsg);
347	greg	1.7	matselect = S_NONE;
348	greg	1.6	return;
349	greg	1.1	}
350			opterr: /* skip faulty option */
351			cp = sskip(cp);
352			nerrs++;
353			}
354	greg	1.2	/* print header? */
355			checkhead();
356			/* issue warnings? */
357	greg	1.1	if (nerrs) {
358			sprintf(errmsg, "(%s): %d error(s) in option line:",
359			nm, nerrs);
360			error(WARNING, errmsg);
361	greg	1.2	wputs(s);
362			printf("# %s: the following option line has %d error(s):\n",
363			progname, nerrs);
364	greg	1.1	}
365	greg	1.2	/* print pure comment */
366	greg	1.4	printf("# %s", s+2);
367	greg	1.9	}
368
369
370			printopts() /* print out option default values */
371			{
372			printf("m=%s\t\t\t# material name\n", thisillum.matname);
373			printf("f=%s\t\t\t# data file name\n", thisillum.datafile);
374			printf("c=n\t\t\t\t# color none\n");
375			printf("d=%d\t\t\t\t# density of points\n", thisillum.sampdens);
376			printf("s=%d\t\t\t\t# samples per point\n", thisillum.nsamps);
377	greg	1.1	}
378	greg	1.2
379
380			printhead(ac, av) /* print out header */
381			register int ac;
382			register char **av;
383			{
384			putchar('#');
385			while (ac-- > 0) {
386			putchar(' ');
387			fputs(*av++, stdout);
388			}
389	greg	1.6	fputs("\n#@mkillum !\n", stdout);
390	greg	1.2	}
391
392
393			xobject(fp, nm) /* translate an object from fp */
394			FILE *fp;
395			char *nm;
396			{
397			OBJREC thisobj;
398			char str[MAXSTR];
399			int doit;
400			/* read the object */
401			if (fgetword(thisillum.altmat, MAXSTR, fp) == NULL)
402			goto readerr;
403			if (fgetword(str, MAXSTR, fp) == NULL)
404			goto readerr;
405			/* is it an alias? */
406			if (!strcmp(str, ALIASID)) {
407			if (fgetword(str, MAXSTR, fp) == NULL)
408			goto readerr;
409			printf("\n%s %s %s", thisillum.altmat, ALIASID, str);
410			if (fgetword(str, MAXSTR, fp) == NULL)
411			goto readerr;
412	greg	1.4	printf("\t%s\n", str);
413	greg	1.2	return;
414			}
415	greg	1.4	thisobj.omod = OVOID; /* unused field */
416	greg	1.2	if ((thisobj.otype = otype(str)) < 0) {
417			sprintf(errmsg, "(%s): unknown type \"%s\"", nm, str);
418			error(USER, errmsg);
419			}
420			if (fgetword(str, MAXSTR, fp) == NULL)
421			goto readerr;
422			thisobj.oname = str;
423			if (readfargs(&thisobj.oargs, fp) != 1)
424			goto readerr;
425			thisobj.os = NULL;
426			/* check for translation */
427			switch (matselect) {
428			case S_NONE:
429			doit = 0;
430			break;
431			case S_ALL:
432	greg	1.4	doit = 1;
433	greg	1.2	break;
434			case S_ELEM:
435			doit = !strcmp(thisillum.altmat, matcheck);
436			break;
437			case S_COMPL:
438			doit = strcmp(thisillum.altmat, matcheck);
439			break;
440			}
441	greg	1.4	doit = doit && issurface(thisobj.otype);
442	greg	1.2	/* print header? */
443			checkhead();
444			/* process object */
445			if (doit)
446	greg	1.4	(*ofun[thisobj.otype].funp)(&thisobj, &thisillum, &rt, nm);
447	greg	1.2	else
448			printobj(thisillum.altmat, &thisobj);
449			/* free arguments */
450			freefargs(&thisobj.oargs);
451			return;
452			readerr:
453			sprintf(errmsg, "(%s): error reading scene", nm);
454			error(USER, errmsg);
455			}