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 */
#define  DFLDAT         "illum"         /* data file 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,
                DFLDAT,
                0,
                VOIDID,
                SAMPDENS,
                NSAMPS,
                0.,
        };

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 */
        errno = 0;
        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.dfnum = 0;
                                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 'b':                       /* brightness */
                        if (*++cp != '=')
                                break;
                        if (!isfltd(++cp, " \t\n"))
                                break;
                        thisillum.minbrt = atof(cp);
                        if (thisillum.minbrt < 0.)
                                thisillum.minbrt = 0.;
                        cp = sskip(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=%-15s\t\t# material name\n", thisillum.matname);
        printf("f=%-15s\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);
        printf("b=%f\t\t\t# minimum average brightness\n", thisillum.minbrt);
}


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:	1.14
Committed:	Fri Nov 8 13:17:44 1991 UTC (32 years, 5 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.13:	+1 -0 lines
Log Message:	reset errno at appropriate points
#	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	greg	1.10	#define DFLDAT "illum" /* data file name */
22	greg	1.1	/* selection options */
23			#define S_NONE 0 /* select none */
24			#define S_ELEM 1 /* select specified element */
25			#define S_COMPL 2 /* select all but element */
26			#define S_ALL 3 /* select all */
27
28			/* rtrace command and defaults */
29	greg	1.4	char *rtargv[64] = { "rtrace", "-dj", ".25", "-dr", "3", "-di+",
30			"-ab", "2", "-ad", "256", "-as", "128", "-aa", ".15", };
31			int rtargc = 14;
32	greg	1.1	/* overriding rtrace options */
33	greg	1.4	char *myrtopts[] = { "-I-", "-i-", "-ov", "-h-", "-fff", NULL };
34	greg	1.1
35	greg	1.2	struct rtproc rt; /* our rtrace process */
36	greg	1.1
37	greg	1.2	struct illum_args thisillum = { /* our illum and default values */
38			0,
39			DFLMAT,
40	greg	1.10	DFLDAT,
41	greg	1.2	0,
42			VOIDID,
43	greg	1.3	SAMPDENS,
44	greg	1.2	NSAMPS,
45	greg	1.12	0.,
46	greg	1.2	};
47	greg	1.1
48			char matcheck[MAXSTR]; /* current material to include or exclude */
49			int matselect = S_ALL; /* selection criterion */
50
51	greg	1.2	FUN ofun[NUMOTYPE] = INIT_OTYPE; /* object types */
52	greg	1.1
53			int gargc; /* global argc */
54			char *gargv; / global argv */
55			#define progname gargv[0]
56
57			int doneheader = 0; /* printed header yet? */
58	greg	1.2	#define checkhead() if (!doneheader++) printhead(gargc,gargv)
59	greg	1.1
60	greg	1.2	int warnings = 1; /* print warnings? */
61
62	greg	1.1	extern char fgetline(), fgetword(), *sskip(),
63	greg	1.6	atos(), iskip(), fskip(), strcpy();
64	greg	1.1	extern FILE *popen();
65
66
67			main(argc, argv) /* compute illum distributions using rtrace */
68			int argc;
69			char *argv[];
70			{
71			extern char getenv(), getpath();
72			char *rtpath;
73	greg	1.3	FILE *fp;
74	greg	1.1	register int i;
75			/* set global arguments */
76	greg	1.3	gargv = argv;
77	greg	1.1	/* set up rtrace command */
78	greg	1.3	for (i = 1; i < argc; i++) {
79			if (argv[i][0] == '<' && !argv[i][1])
80			break;
81	greg	1.1	rtargv[rtargc++] = argv[i];
82	greg	1.2	if (argv[i][0] == '-' && argv[i][1] == 'w')
83			warnings = !warnings;
84			}
85	greg	1.3	if ((gargc = i) < 2)
86			error(USER, "too few arguments");
87			rtargc--;
88	greg	1.1	for (i = 0; myrtopts[i] != NULL; i++)
89			rtargv[rtargc++] = myrtopts[i];
90	greg	1.3	rtargv[rtargc++] = argv[gargc-1];
91	greg	1.1	rtargv[rtargc] = NULL;
92			/* just asking for defaults? */
93	greg	1.3	if (!strcmp(argv[gargc-1], "-defaults")) {
94	greg	1.9	printopts(); fflush(stdout);
95	greg	1.1	rtpath = getpath(rtargv[0], getenv("PATH"), X_OK);
96			if (rtpath == NULL) {
97			eputs(rtargv[0]);
98			eputs(": command not found\n");
99			exit(1);
100			}
101			execv(rtpath, rtargv);
102			perror(rtpath);
103			exit(1);
104			}
105			/* else initialize and run our calculation */
106			init();
107	greg	1.3	if (gargc+1 < argc)
108			for (i = gargc+1; i < argc; i++) {
109	greg	1.5	if ((fp = fopen(argv[i], "r")) == NULL) {
110	greg	1.3	sprintf(errmsg,
111			"cannot open scene file \"%s\"", argv[i]);
112			error(SYSTEM, errmsg);
113			}
114			filter(fp, argv[i]);
115			fclose(fp);
116			}
117			else
118			filter(stdin, "standard input");
119	greg	1.2	quit(0);
120	greg	1.1	}
121
122
123	greg	1.3	quit(status) /* exit with status */
124			int status;
125			{
126			int rtstat;
127
128			rtstat = close_process(rt.pd);
129			if (status == 0)
130			if (rtstat < 0)
131			error(WARNING,
132			"unknown return status from rtrace process");
133			else
134			status = rtstat;
135			exit(status);
136			}
137
138
139	greg	1.1	init() /* start rtrace and set up buffers */
140			{
141	greg	1.4	extern int o_face(), o_sphere(), o_ring();
142	greg	1.1	int maxbytes;
143	greg	1.3	/* set up object functions */
144			ofun[OBJ_FACE].funp = o_face;
145	greg	1.4	ofun[OBJ_SPHERE].funp = o_sphere;
146	greg	1.3	ofun[OBJ_RING].funp = o_ring;
147			/* set up signal handling */
148			signal(SIGPIPE, quit);
149			/* start rtrace process */
150	greg	1.14	errno = 0;
151	greg	1.2	maxbytes = open_process(rt.pd, rtargv);
152	greg	1.1	if (maxbytes == 0) {
153			eputs(rtargv[0]);
154			eputs(": command not found\n");
155			exit(1);
156			}
157			if (maxbytes < 0)
158			error(SYSTEM, "cannot start rtrace process");
159	greg	1.2	rt.bsiz = maxbytes/(6*sizeof(float));
160	greg	1.4	rt.buf = (float )malloc(6sizeof(float)*rt.bsiz--);
161			rt.dest = (float *)malloc(sizeof(float )*rt.bsiz);
162			if (rt.buf == NULL \|\| rt.dest == NULL)
163	greg	1.1	error(SYSTEM, "out of memory in init");
164	greg	1.2	rt.nrays = 0;
165	greg	1.6	/* set up urand */
166			initurand(2048);
167	greg	1.1	}
168
169
170			eputs(s) /* put string to stderr */
171			register char *s;
172			{
173			static int midline = 0;
174
175			if (!*s) return;
176			if (!midline) {
177			fputs(progname, stderr);
178			fputs(": ", stderr);
179			}
180			fputs(s, stderr);
181			midline = s[strlen(s)-1] != '\n';
182			}
183
184
185	greg	1.2	wputs(s) /* print warning if enabled */
186			char *s;
187			{
188			if (warnings)
189			eputs(s);
190			}
191
192
193			filter(infp, name) /* process stream */
194	greg	1.1	register FILE *infp;
195			char *name;
196			{
197			char buf[512];
198			FILE *pfp;
199			register int c;
200
201			while ((c = getc(infp)) != EOF) {
202			if (isspace(c))
203			continue;
204			if (c == '#') { /* comment/options */
205			buf[0] = c;
206			fgets(buf+1, sizeof(buf)-1, infp);
207	greg	1.2	xoptions(buf, name);
208	greg	1.1	} else if (c == '!') { /* command */
209			buf[0] = c;
210			fgetline(buf+1, sizeof(buf)-1, infp);
211			if ((pfp = popen(buf+1, "r")) == NULL) {
212			sprintf(errmsg, "cannot execute \"%s\"", buf);
213			error(SYSTEM, errmsg);
214			}
215	greg	1.2	filter(pfp, buf);
216	greg	1.1	pclose(pfp);
217			} else { /* object */
218			ungetc(c, infp);
219			xobject(infp, name);
220			}
221			}
222			}
223
224
225	greg	1.2	xoptions(s, nm) /* process options in string s */
226	greg	1.1	char *s;
227			char *nm;
228			{
229			extern FILE *freopen();
230			char buf[64];
231			int nerrs = 0;
232			register char *cp;
233
234	greg	1.2	if (strncmp(s, "#@mkillum", 9) \|\| !isspace(s[9])) {
235			fputs(s, stdout); /* not for us */
236	greg	1.1	return;
237	greg	1.2	}
238	greg	1.1	cp = s+10;
239			while (*cp) {
240			switch (*cp) {
241			case ' ':
242			case '\t':
243			case '\n':
244			cp++;
245			continue;
246			case 'm': /* material name */
247	greg	1.2	if (*++cp != '=')
248	greg	1.1	break;
249	greg	1.2	if (!*++cp)
250			break;
251	greg	1.1	atos(thisillum.matname, MAXSTR, cp);
252			cp = sskip(cp);
253			if (!(thisillum.flags & IL_DATCLB)) {
254			strcpy(thisillum.datafile, thisillum.matname);
255			thisillum.dfnum = 0;
256			}
257			continue;
258			case 'f': /* data file name */
259	greg	1.2	if (*++cp != '=')
260	greg	1.1	break;
261	greg	1.2	if (!*++cp) {
262	greg	1.6	strcpy(thisillum.datafile,thisillum.matname);
263	greg	1.10	thisillum.dfnum = 0;
264	greg	1.1	thisillum.flags &= ~IL_DATCLB;
265			continue;
266			}
267			atos(thisillum.datafile, MAXSTR, cp);
268			cp = sskip(cp);
269			thisillum.dfnum = 0;
270			thisillum.flags \|= IL_DATCLB;
271			continue;
272			case 'i': /* include material */
273			case 'e': /* exclude material */
274	greg	1.6	if (cp[1] != '=')
275	greg	1.1	break;
276	greg	1.7	matselect = (*cp == 'i') ? S_ELEM : S_COMPL;
277			cp += 2;
278			atos(matcheck, MAXSTR, cp);
279	greg	1.1	cp = sskip(cp);
280			continue;
281			case 'a': /* use everything */
282			cp = sskip(cp);
283			matselect = S_ALL;
284			continue;
285			case 'n': /* use nothing (passive) */
286			cp = sskip(cp);
287			matselect = S_NONE;
288			continue;
289			case 'c': /* color calculation */
290	greg	1.2	if (*++cp != '=')
291	greg	1.1	break;
292	greg	1.2	switch (*++cp) {
293	greg	1.1	case 'a': /* average */
294	greg	1.6	thisillum.flags = (thisillum.flags\|IL_COLAVG)
295			& ~IL_COLDST;
296	greg	1.1	break;
297			case 'd': /* distribution */
298	greg	1.5	thisillum.flags \|= (IL_COLDST\|IL_COLAVG);
299	greg	1.1	break;
300			case 'n': /* none */
301			thisillum.flags &= ~(IL_COLAVG\|IL_COLDST);
302			break;
303			default:
304			goto opterr;
305			}
306			cp = sskip(cp);
307			continue;
308			case 'd': /* point sample density */
309	greg	1.2	if (*++cp != '=')
310	greg	1.1	break;
311	greg	1.2	if (!isintd(++cp, " \t\n"))
312	greg	1.1	break;
313	greg	1.3	thisillum.sampdens = atoi(cp);
314	greg	1.1	cp = sskip(cp);
315			continue;
316			case 's': /* point super-samples */
317	greg	1.2	if (*++cp != '=')
318	greg	1.1	break;
319	greg	1.2	if (!isintd(++cp, " \t\n"))
320	greg	1.1	break;
321			thisillum.nsamps = atoi(cp);
322			cp = sskip(cp);
323			continue;
324	greg	1.3	case 'l': /* light sources */
325	greg	1.4	cp++;
326			if (*cp == '+')
327	greg	1.3	thisillum.flags \|= IL_LIGHT;
328	greg	1.4	else if (*cp == '-')
329			thisillum.flags &= ~IL_LIGHT;
330	greg	1.3	else
331	greg	1.4	break;
332			cp++;
333	greg	1.3	continue;
334	greg	1.12	case 'b': /* brightness */
335			if (*++cp != '=')
336			break;
337			if (!isfltd(++cp, " \t\n"))
338			break;
339			thisillum.minbrt = atof(cp);
340	greg	1.13	if (thisillum.minbrt < 0.)
341			thisillum.minbrt = 0.;
342	greg	1.12	cp = sskip(cp);
343			continue;
344	greg	1.1	case 'o': /* output file */
345	greg	1.2	if (*++cp != '=')
346	greg	1.1	break;
347	greg	1.2	if (!*++cp)
348			break;
349	greg	1.1	atos(buf, sizeof(buf), cp);
350			cp = sskip(cp);
351			if (freopen(buf, "w", stdout) == NULL) {
352			sprintf(errmsg,
353			"cannot open output file \"%s\"", buf);
354			error(SYSTEM, errmsg);
355			}
356			doneheader = 0;
357			continue;
358	greg	1.6	case '!': /* processed file! */
359	greg	1.7	sprintf(errmsg, "(%s): already processed!", nm);
360	greg	1.6	error(WARNING, errmsg);
361	greg	1.7	matselect = S_NONE;
362	greg	1.6	return;
363	greg	1.1	}
364			opterr: /* skip faulty option */
365			cp = sskip(cp);
366			nerrs++;
367			}
368	greg	1.2	/* print header? */
369			checkhead();
370			/* issue warnings? */
371	greg	1.1	if (nerrs) {
372			sprintf(errmsg, "(%s): %d error(s) in option line:",
373			nm, nerrs);
374			error(WARNING, errmsg);
375	greg	1.2	wputs(s);
376			printf("# %s: the following option line has %d error(s):\n",
377			progname, nerrs);
378	greg	1.1	}
379	greg	1.2	/* print pure comment */
380	greg	1.4	printf("# %s", s+2);
381	greg	1.9	}
382
383
384			printopts() /* print out option default values */
385			{
386	greg	1.11	printf("m=%-15s\t\t# material name\n", thisillum.matname);
387			printf("f=%-15s\t\t# data file name\n", thisillum.datafile);
388	greg	1.9	printf("c=n\t\t\t\t# color none\n");
389			printf("d=%d\t\t\t\t# density of points\n", thisillum.sampdens);
390			printf("s=%d\t\t\t\t# samples per point\n", thisillum.nsamps);
391	greg	1.12	printf("b=%f\t\t\t# minimum average brightness\n", thisillum.minbrt);
392	greg	1.1	}
393	greg	1.2
394
395			printhead(ac, av) /* print out header */
396			register int ac;
397			register char **av;
398			{
399			putchar('#');
400			while (ac-- > 0) {
401			putchar(' ');
402			fputs(*av++, stdout);
403			}
404	greg	1.6	fputs("\n#@mkillum !\n", stdout);
405	greg	1.2	}
406
407
408			xobject(fp, nm) /* translate an object from fp */
409			FILE *fp;
410			char *nm;
411			{
412			OBJREC thisobj;
413			char str[MAXSTR];
414			int doit;
415			/* read the object */
416			if (fgetword(thisillum.altmat, MAXSTR, fp) == NULL)
417			goto readerr;
418			if (fgetword(str, MAXSTR, fp) == NULL)
419			goto readerr;
420			/* is it an alias? */
421			if (!strcmp(str, ALIASID)) {
422			if (fgetword(str, MAXSTR, fp) == NULL)
423			goto readerr;
424			printf("\n%s %s %s", thisillum.altmat, ALIASID, str);
425			if (fgetword(str, MAXSTR, fp) == NULL)
426			goto readerr;
427	greg	1.4	printf("\t%s\n", str);
428	greg	1.2	return;
429			}
430	greg	1.4	thisobj.omod = OVOID; /* unused field */
431	greg	1.2	if ((thisobj.otype = otype(str)) < 0) {
432			sprintf(errmsg, "(%s): unknown type \"%s\"", nm, str);
433			error(USER, errmsg);
434			}
435			if (fgetword(str, MAXSTR, fp) == NULL)
436			goto readerr;
437			thisobj.oname = str;
438			if (readfargs(&thisobj.oargs, fp) != 1)
439			goto readerr;
440			thisobj.os = NULL;
441			/* check for translation */
442			switch (matselect) {
443			case S_NONE:
444			doit = 0;
445			break;
446			case S_ALL:
447	greg	1.4	doit = 1;
448	greg	1.2	break;
449			case S_ELEM:
450			doit = !strcmp(thisillum.altmat, matcheck);
451			break;
452			case S_COMPL:
453			doit = strcmp(thisillum.altmat, matcheck);
454			break;
455			}
456	greg	1.4	doit = doit && issurface(thisobj.otype);
457	greg	1.2	/* print header? */
458			checkhead();
459			/* process object */
460			if (doit)
461	greg	1.4	(*ofun[thisobj.otype].funp)(&thisobj, &thisillum, &rt, nm);
462	greg	1.2	else
463			printobj(thisillum.altmat, &thisobj);
464			/* free arguments */
465			freefargs(&thisobj.oargs);
466			return;
467			readerr:
468			sprintf(errmsg, "(%s): error reading scene", nm);
469			error(USER, errmsg);
470			}