src/gen/mkillum.c

#ifndef lint
static const char RCSid[] = "$Id: mkillum.c,v 2.44 2023/02/06 22:40:21 greg Exp $";
#endif
/*
 * Make illum sources for optimizing rendering process
 */

#include  <signal.h>
#include  <ctype.h>

#include  "paths.h"             /* win_popen() */
#include  "mkillum.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 */

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 */

int     gargc;                  /* global argc */
char    **gargv;                /* global argv */

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

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

void init(char *octnm, int np);
void filter(FILE        *infp, char     *name);
void xoptions(char      *s, char        *nm);
void printopts(void);
void printhead(int  ac, char  **av);
void xobject(FILE  *fp, char  *nm);


int
main(           /* compute illum distributions using rtrace */
        int     argc,
        char    *argv[]
)
{
        int     nprocs = 1;
        FILE    *fp;
        int     rval;
        int     i;
                                /* set global arguments */
        gargv = argv;
        progname = gargv[0];
                                /* set up rendering defaults */
        dstrsrc = 0.5;
        directrelay = 3;
        ambounce = 2;
                                /* get options from command line */
        for (i = 1; i < argc; i++) {
                while ((rval = expandarg(&argc, &argv, i)) > 0)
                        ;
                if (rval < 0) {
                        sprintf(errmsg, "cannot expand '%s'", argv[i]);
                        error(SYSTEM, errmsg);
                }
                if (argv[i][0] != '-')
                        break;
                if (!strcmp(argv[i], "-w")) {
                        warnings = 0;
                        continue;
                }
                if (!strcmp(argv[i], "-n")) {
                        nprocs = atoi(argv[++i]);
                        if (nprocs <= 0)
                                error(USER, "illegal number of processes");
                        continue;
                }
                if (!strcmp(argv[i], "-defaults")) {
                        printopts();
                        print_rdefaults();
                        quit(0);
                }
                rval = getrenderopt(argc-i, argv+i);
                if (rval < 0) {
                        sprintf(errmsg, "bad render option at '%s'", argv[i]);
                        error(USER, errmsg);
                }
                i += rval;
        }
        gargc = ++i;
                                /* add "mandatory" render options */
        do_irrad = 0;
        if (gargc > argc || argv[gargc-1][0] == '-')
                error(USER, "missing octree argument");
                                /* else initialize and run our calculation */
        init(argv[gargc-1], nprocs);
        if (gargc < argc) {
                if (gargc == argc-1 || argv[gargc][0] != '<' || argv[gargc][1])
                        error(USER, "use '< file1 file2 ..' for multiple inputs");
                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);
        return 0; /* pro forma return */
}


void
init(char *octnm, int np)               /* start rendering process(es) */
{
                                        /* set up signal handling */
        signal(SIGINT, quit);
#ifdef SIGHUP
        signal(SIGHUP, quit);
#endif
#ifdef SIGTERM
        signal(SIGTERM, quit);
#endif
#ifdef SIGPIPE
        signal(SIGPIPE, quit);
#endif
                                        /* start rendering process(es) */
        ray_pinit(octnm, np);
}


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

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


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


void
quit(int ec)                    /* make sure exit is called */
{
        if (ray_pnprocs > 0)    /* close children if any */
                ray_pclose(0);
        else if (ray_pnprocs < 0)
                _exit(ec);      /* avoid flush() in child */
        exit(ec);
}


void
filter(         /* process stream */
        FILE    *infp,
        char    *name
)
{
        char    buf[512];
        FILE    *pfp;
        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);
                        if (pclose(pfp) != 0) {
                                sprintf(errmsg, "bad status from \"%s\"", buf);
                                error(USER, errmsg);
                        }
                } else {                                /* object */
                        ungetc(c, infp);
                        xobject(infp, name);
                }
        }
}


void
xoptions(                       /* process options in string s */
        char    *s,
        char    *nm
)
{
        char    buf[64];
        int     negax;
        int     nerrs = 0;
        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':
                case '\r':
                case '\f':
                        cp++;
                        continue;
                case 'm':                       /* material name */
                        if (*++cp != '=')
                                break;
                        if (!*++cp || isspace(*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 || isspace(*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':                       /* sample density */
                        if (*++cp != '=')
                                break;
                        if (!*++cp || isspace(*cp))
                                continue;
                        if (isintd(cp, " \t\n\r")) {
                                thisillum.sampdens = atoi(cp);
                        } else {
                                error(WARNING, "direct BSDF input unsupported");
                                goto opterr;
                        }
                        cp = sskip(cp);
                        continue;
                case 's':                       /* surface super-samples */
                        if (*++cp != '=')
                                break;
                        if (!isintd(++cp, " \t\n\r"))
                                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\r"))
                                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 || isspace(*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 */
                while (*cp && !isspace(*cp))
                        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);
}

void
printopts(void)                 /* 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);
        if (thisillum.flags & IL_COLAVG)
                if (thisillum.flags & IL_COLDST)
                        printf("c=d\t\t\t\t# color distribution\n");
                else
                        printf("c=a\t\t\t\t# color average\n");
        else
                printf("c=n\t\t\t\t# color none\n");
        if (thisillum.flags & IL_LIGHT)
                printf("l+\t\t\t\t# light type on\n");
        else
                printf("l-\t\t\t\t# light type off\n");
        printf("d=%d\t\t\t\t# density of directions\n", thisillum.sampdens);
        printf("s=%d\t\t\t\t# samples per direction\n", thisillum.nsamps);
        printf("b=%f\t\t\t# minimum average brightness\n", thisillum.minbrt);
}


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


void
xobject(                                /* 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, ALIASKEY)) {
                if (fgetword(str, MAXSTR, fp) == NULL)
                        goto readerr;
                printf("\n%s %s %s", thisillum.altmat, ALIASKEY, 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)
                switch (thisobj.otype) {
                case OBJ_FACE:
                        my_face(&thisobj, &thisillum, nm);
                        break;
                case OBJ_SPHERE:
                        my_sphere(&thisobj, &thisillum, nm);
                        break;
                case OBJ_RING:
                        my_ring(&thisobj, &thisillum, nm);
                        break;
                default:
                        my_default(&thisobj, &thisillum, nm);
                        break;
                }
        else
                printobj(thisillum.altmat, &thisobj);
                                                /* free arguments */
        freefargs(&thisobj.oargs);
        return;
readerr:
        sprintf(errmsg, "(%s): error reading input", nm);
        error(USER, errmsg);
}
Revision:	2.45
Committed:	Tue Apr 22 04:45:25 2025 UTC (11 days, 14 hours ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.44:	+5 -2 lines
Log Message:	fix: Added check to return value of pclose() in several tools
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.45	static const char RCSid[] = "$Id: mkillum.c,v 2.44 2023/02/06 22:40:21 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* Make illum sources for optimizing rendering process
6			*/
7
8	greg	1.3	#include <signal.h>
9	schorsch	2.13	#include <ctype.h>
10	greg	1.3
11	greg	2.41	#include "paths.h" /* win_popen() */
12	greg	2.15	#include "mkillum.h"
13	greg	1.1
14			/* default parameters */
15	greg	1.8	#define SAMPDENS 48 /* points per projected steradian */
16	greg	1.1	#define NSAMPS 32 /* samples per point */
17			#define DFLMAT "illum_mat" /* material name */
18	greg	1.10	#define DFLDAT "illum" /* data file name */
19	greg	1.1	/* selection options */
20			#define S_NONE 0 /* select none */
21			#define S_ELEM 1 /* select specified element */
22			#define S_COMPL 2 /* select all but element */
23			#define S_ALL 3 /* select all */
24
25	greg	1.2	struct illum_args thisillum = { /* our illum and default values */
26			0,
27			DFLMAT,
28	greg	1.10	DFLDAT,
29	greg	1.2	0,
30			VOIDID,
31	greg	1.3	SAMPDENS,
32	greg	1.2	NSAMPS,
33	greg	1.12	0.,
34	greg	1.2	};
35	greg	1.1
36			char matcheck[MAXSTR]; /* current material to include or exclude */
37			int matselect = S_ALL; /* selection criterion */
38
39			int gargc; /* global argc */
40			char *gargv; / global argv */
41
42			int doneheader = 0; /* printed header yet? */
43	greg	1.2	#define checkhead() if (!doneheader++) printhead(gargc,gargv)
44	greg	1.1
45	greg	1.2	int warnings = 1; /* print warnings? */
46
47	greg	2.28	void init(char *octnm, int np);
48	greg	2.42	void filter(FILE infp, char name);
49	schorsch	2.19	void xoptions(char s, char nm);
50			void printopts(void);
51	greg	2.42	void printhead(int ac, char **av);
52	schorsch	2.19	void xobject(FILE fp, char nm);
53	greg	1.1
54	schorsch	2.19
55			int
56			main( /* compute illum distributions using rtrace */
57			int argc,
58			char *argv[]
59			)
60	greg	1.1	{
61	greg	2.20	int nprocs = 1;
62	greg	1.3	FILE *fp;
63	greg	2.28	int rval;
64	greg	2.42	int i;
65	greg	1.1	/* set global arguments */
66	greg	1.3	gargv = argv;
67	greg	2.28	progname = gargv[0];
68			/* set up rendering defaults */
69	greg	2.35	dstrsrc = 0.5;
70	greg	2.28	directrelay = 3;
71			ambounce = 2;
72			/* get options from command line */
73	greg	2.29	for (i = 1; i < argc; i++) {
74	greg	2.28	while ((rval = expandarg(&argc, &argv, i)) > 0)
75			;
76			if (rval < 0) {
77			sprintf(errmsg, "cannot expand '%s'", argv[i]);
78			error(SYSTEM, errmsg);
79			}
80			if (argv[i][0] != '-')
81	greg	1.3	break;
82	greg	2.28	if (!strcmp(argv[i], "-w")) {
83			warnings = 0;
84			continue;
85			}
86			if (!strcmp(argv[i], "-n")) {
87			nprocs = atoi(argv[++i]);
88			if (nprocs <= 0)
89			error(USER, "illegal number of processes");
90			continue;
91			}
92			if (!strcmp(argv[i], "-defaults")) {
93			printopts();
94			print_rdefaults();
95			quit(0);
96			}
97			rval = getrenderopt(argc-i, argv+i);
98			if (rval < 0) {
99			sprintf(errmsg, "bad render option at '%s'", argv[i]);
100			error(USER, errmsg);
101	greg	1.1	}
102	greg	2.28	i += rval;
103	greg	1.1	}
104	greg	2.28	gargc = ++i;
105			/* add "mandatory" render options */
106			do_irrad = 0;
107			if (gargc > argc \|\| argv[gargc-1][0] == '-')
108	greg	2.3	error(USER, "missing octree argument");
109	greg	1.1	/* else initialize and run our calculation */
110	greg	2.28	init(argv[gargc-1], nprocs);
111			if (gargc < argc) {
112			if (gargc == argc-1 \|\| argv[gargc][0] != '<' \|\| argv[gargc][1])
113	greg	2.30	error(USER, "use '< file1 file2 ..' for multiple inputs");
114	greg	1.3	for (i = gargc+1; i < argc; i++) {
115	greg	1.5	if ((fp = fopen(argv[i], "r")) == NULL) {
116	greg	1.3	sprintf(errmsg,
117			"cannot open scene file \"%s\"", argv[i]);
118			error(SYSTEM, errmsg);
119			}
120			filter(fp, argv[i]);
121			fclose(fp);
122			}
123	greg	2.28	} else
124	greg	1.3	filter(stdin, "standard input");
125	greg	2.20	quit(0);
126	schorsch	2.27	return 0; /* pro forma return */
127	greg	1.1	}
128
129	schorsch	2.26
130	greg	2.11	void
131	greg	2.28	init(char octnm, int np) / start rendering process(es) */
132	greg	1.3	{
133			/* set up signal handling */
134	greg	2.25	signal(SIGINT, quit);
135			#ifdef SIGHUP
136			signal(SIGHUP, quit);
137			#endif
138			#ifdef SIGTERM
139			signal(SIGTERM, quit);
140			#endif
141			#ifdef SIGPIPE
142	greg	1.3	signal(SIGPIPE, quit);
143	schorsch	2.13	#endif
144	greg	2.28	/* start rendering process(es) */
145			ray_pinit(octnm, np);
146	greg	1.1	}
147
148
149	greg	2.11	void
150	schorsch	2.19	eputs( /* put string to stderr */
151	greg	2.44	const char *s
152	schorsch	2.19	)
153	greg	1.1	{
154			static int midline = 0;
155
156			if (!*s) return;
157			if (!midline) {
158			fputs(progname, stderr);
159			fputs(": ", stderr);
160			}
161			fputs(s, stderr);
162			midline = s[strlen(s)-1] != '\n';
163			}
164
165
166	greg	2.11	void
167	greg	2.44	wputs(const char s) / print warning if enabled */
168	greg	1.2	{
169			if (warnings)
170			eputs(s);
171			}
172
173
174	schorsch	2.19	void
175	greg	2.44	quit(int ec) /* make sure exit is called */
176	greg	2.36	{
177			if (ray_pnprocs > 0) /* close children if any */
178	greg	2.43	ray_pclose(0);
179			else if (ray_pnprocs < 0)
180			_exit(ec); /* avoid flush() in child */
181	greg	2.36	exit(ec);
182			}
183
184
185			void
186	schorsch	2.19	filter( /* process stream */
187	greg	2.42	FILE *infp,
188	schorsch	2.19	char *name
189			)
190	greg	1.1	{
191			char buf[512];
192			FILE *pfp;
193	greg	2.42	int c;
194	greg	1.1
195			while ((c = getc(infp)) != EOF) {
196			if (isspace(c))
197			continue;
198			if (c == '#') { /* comment/options */
199			buf[0] = c;
200			fgets(buf+1, sizeof(buf)-1, infp);
201	greg	1.2	xoptions(buf, name);
202	greg	1.1	} else if (c == '!') { /* command */
203			buf[0] = c;
204			fgetline(buf+1, sizeof(buf)-1, infp);
205			if ((pfp = popen(buf+1, "r")) == NULL) {
206			sprintf(errmsg, "cannot execute \"%s\"", buf);
207			error(SYSTEM, errmsg);
208			}
209	greg	1.2	filter(pfp, buf);
210	greg	2.45	if (pclose(pfp) != 0) {
211			sprintf(errmsg, "bad status from \"%s\"", buf);
212			error(USER, errmsg);
213			}
214	greg	1.1	} else { /* object */
215			ungetc(c, infp);
216			xobject(infp, name);
217			}
218			}
219			}
220
221
222	schorsch	2.19	void
223			xoptions( /* process options in string s */
224			char *s,
225			char *nm
226			)
227	greg	1.1	{
228			char buf[64];
229	greg	2.30	int negax;
230	greg	1.1	int nerrs = 0;
231	greg	2.42	char *cp;
232	greg	1.1
233	greg	1.2	if (strncmp(s, "#@mkillum", 9) \|\| !isspace(s[9])) {
234			fputs(s, stdout); /* not for us */
235	greg	1.1	return;
236	greg	1.2	}
237	greg	1.1	cp = s+10;
238			while (*cp) {
239			switch (*cp) {
240			case ' ':
241			case '\t':
242			case '\n':
243	greg	2.11	case '\r':
244			case '\f':
245	greg	1.1	cp++;
246			continue;
247			case 'm': /* material name */
248	greg	1.2	if (*++cp != '=')
249	greg	1.1	break;
250	greg	2.8	if (!++cp \|\| isspace(cp))
251	greg	1.2	break;
252	greg	1.1	atos(thisillum.matname, MAXSTR, cp);
253			cp = sskip(cp);
254			if (!(thisillum.flags & IL_DATCLB)) {
255			strcpy(thisillum.datafile, thisillum.matname);
256			thisillum.dfnum = 0;
257			}
258			continue;
259			case 'f': /* data file name */
260	greg	1.2	if (*++cp != '=')
261	greg	1.1	break;
262	greg	2.8	if (!++cp \|\| isspace(cp)) {
263	greg	1.6	strcpy(thisillum.datafile,thisillum.matname);
264	greg	1.10	thisillum.dfnum = 0;
265	greg	1.1	thisillum.flags &= ~IL_DATCLB;
266			continue;
267			}
268			atos(thisillum.datafile, MAXSTR, cp);
269			cp = sskip(cp);
270			thisillum.dfnum = 0;
271			thisillum.flags \|= IL_DATCLB;
272			continue;
273			case 'i': /* include material */
274			case 'e': /* exclude material */
275	greg	1.6	if (cp[1] != '=')
276	greg	1.1	break;
277	greg	1.7	matselect = (*cp == 'i') ? S_ELEM : S_COMPL;
278			cp += 2;
279			atos(matcheck, MAXSTR, cp);
280	greg	1.1	cp = sskip(cp);
281			continue;
282			case 'a': /* use everything */
283			cp = sskip(cp);
284			matselect = S_ALL;
285			continue;
286			case 'n': /* use nothing (passive) */
287			cp = sskip(cp);
288			matselect = S_NONE;
289			continue;
290			case 'c': /* color calculation */
291	greg	1.2	if (*++cp != '=')
292	greg	1.1	break;
293	greg	1.2	switch (*++cp) {
294	greg	1.1	case 'a': /* average */
295	greg	1.6	thisillum.flags = (thisillum.flags\|IL_COLAVG)
296			& ~IL_COLDST;
297	greg	1.1	break;
298			case 'd': /* distribution */
299	greg	1.5	thisillum.flags \|= (IL_COLDST\|IL_COLAVG);
300	greg	1.1	break;
301			case 'n': /* none */
302			thisillum.flags &= ~(IL_COLAVG\|IL_COLDST);
303			break;
304			default:
305			goto opterr;
306			}
307			cp = sskip(cp);
308			continue;
309	greg	2.39	case 'd': /* sample density */
310	greg	1.2	if (*++cp != '=')
311	greg	1.1	break;
312	greg	2.30	if (!++cp \|\| isspace(cp))
313			continue;
314	greg	2.33	if (isintd(cp, " \t\n\r")) {
315	greg	2.30	thisillum.sampdens = atoi(cp);
316			} else {
317	greg	2.39	error(WARNING, "direct BSDF input unsupported");
318			goto opterr;
319	greg	2.30	}
320	greg	1.1	cp = sskip(cp);
321			continue;
322	greg	2.30	case 's': /* surface super-samples */
323	greg	1.2	if (*++cp != '=')
324	greg	1.1	break;
325	greg	2.11	if (!isintd(++cp, " \t\n\r"))
326	greg	1.1	break;
327			thisillum.nsamps = atoi(cp);
328			cp = sskip(cp);
329			continue;
330	greg	1.3	case 'l': /* light sources */
331	greg	1.4	cp++;
332			if (*cp == '+')
333	greg	1.3	thisillum.flags \|= IL_LIGHT;
334	greg	1.4	else if (*cp == '-')
335			thisillum.flags &= ~IL_LIGHT;
336	greg	1.3	else
337	greg	1.4	break;
338			cp++;
339	greg	1.3	continue;
340	greg	1.12	case 'b': /* brightness */
341			if (*++cp != '=')
342			break;
343	greg	2.11	if (!isfltd(++cp, " \t\n\r"))
344	greg	1.12	break;
345			thisillum.minbrt = atof(cp);
346	greg	1.13	if (thisillum.minbrt < 0.)
347			thisillum.minbrt = 0.;
348	greg	1.12	cp = sskip(cp);
349			continue;
350	greg	1.1	case 'o': /* output file */
351	greg	1.2	if (*++cp != '=')
352	greg	1.1	break;
353	greg	2.8	if (!++cp \|\| isspace(cp))
354	greg	1.2	break;
355	greg	1.1	atos(buf, sizeof(buf), cp);
356			cp = sskip(cp);
357			if (freopen(buf, "w", stdout) == NULL) {
358			sprintf(errmsg,
359			"cannot open output file \"%s\"", buf);
360			error(SYSTEM, errmsg);
361			}
362			doneheader = 0;
363			continue;
364	greg	1.6	case '!': /* processed file! */
365	greg	1.7	sprintf(errmsg, "(%s): already processed!", nm);
366	greg	1.6	error(WARNING, errmsg);
367	greg	1.7	matselect = S_NONE;
368	greg	1.6	return;
369	greg	1.1	}
370			opterr: /* skip faulty option */
371	greg	2.9	while (cp && !isspace(cp))
372			cp++;
373	greg	1.1	nerrs++;
374			}
375	greg	1.2	/* print header? */
376			checkhead();
377			/* issue warnings? */
378	greg	1.1	if (nerrs) {
379			sprintf(errmsg, "(%s): %d error(s) in option line:",
380			nm, nerrs);
381			error(WARNING, errmsg);
382	greg	1.2	wputs(s);
383			printf("# %s: the following option line has %d error(s):\n",
384			progname, nerrs);
385	greg	1.1	}
386	greg	1.2	/* print pure comment */
387	greg	1.4	printf("# %s", s+2);
388	greg	1.9	}
389
390	schorsch	2.19	void
391			printopts(void) /* print out option default values */
392	greg	1.9	{
393	greg	1.11	printf("m=%-15s\t\t# material name\n", thisillum.matname);
394			printf("f=%-15s\t\t# data file name\n", thisillum.datafile);
395	greg	2.2	if (thisillum.flags & IL_COLAVG)
396			if (thisillum.flags & IL_COLDST)
397			printf("c=d\t\t\t\t# color distribution\n");
398			else
399			printf("c=a\t\t\t\t# color average\n");
400			else
401			printf("c=n\t\t\t\t# color none\n");
402			if (thisillum.flags & IL_LIGHT)
403			printf("l+\t\t\t\t# light type on\n");
404			else
405			printf("l-\t\t\t\t# light type off\n");
406	greg	2.34	printf("d=%d\t\t\t\t# density of directions\n", thisillum.sampdens);
407			printf("s=%d\t\t\t\t# samples per direction\n", thisillum.nsamps);
408	greg	1.12	printf("b=%f\t\t\t# minimum average brightness\n", thisillum.minbrt);
409	greg	1.1	}
410	greg	1.2
411
412	schorsch	2.19	void
413			printhead( /* print out header */
414	greg	2.42	int ac,
415			char **av
416	schorsch	2.19	)
417	greg	1.2	{
418			putchar('#');
419			while (ac-- > 0) {
420			putchar(' ');
421			fputs(*av++, stdout);
422			}
423	greg	1.6	fputs("\n#@mkillum !\n", stdout);
424	greg	1.2	}
425
426
427	schorsch	2.19	void
428			xobject( /* translate an object from fp */
429			FILE *fp,
430			char *nm
431			)
432	greg	1.2	{
433			OBJREC thisobj;
434			char str[MAXSTR];
435			int doit;
436			/* read the object */
437			if (fgetword(thisillum.altmat, MAXSTR, fp) == NULL)
438			goto readerr;
439			if (fgetword(str, MAXSTR, fp) == NULL)
440			goto readerr;
441			/* is it an alias? */
442	greg	2.12	if (!strcmp(str, ALIASKEY)) {
443	greg	1.2	if (fgetword(str, MAXSTR, fp) == NULL)
444			goto readerr;
445	greg	2.12	printf("\n%s %s %s", thisillum.altmat, ALIASKEY, str);
446	greg	1.2	if (fgetword(str, MAXSTR, fp) == NULL)
447			goto readerr;
448	greg	1.4	printf("\t%s\n", str);
449	greg	1.2	return;
450			}
451	greg	1.4	thisobj.omod = OVOID; /* unused field */
452	greg	1.2	if ((thisobj.otype = otype(str)) < 0) {
453			sprintf(errmsg, "(%s): unknown type \"%s\"", nm, str);
454			error(USER, errmsg);
455			}
456			if (fgetword(str, MAXSTR, fp) == NULL)
457			goto readerr;
458			thisobj.oname = str;
459			if (readfargs(&thisobj.oargs, fp) != 1)
460			goto readerr;
461			thisobj.os = NULL;
462			/* check for translation */
463			switch (matselect) {
464			case S_NONE:
465			doit = 0;
466			break;
467			case S_ALL:
468	greg	1.4	doit = 1;
469	greg	1.2	break;
470			case S_ELEM:
471			doit = !strcmp(thisillum.altmat, matcheck);
472			break;
473			case S_COMPL:
474			doit = strcmp(thisillum.altmat, matcheck);
475			break;
476			}
477	greg	1.4	doit = doit && issurface(thisobj.otype);
478	greg	1.2	/* print header? */
479			checkhead();
480			/* process object */
481			if (doit)
482	greg	2.28	switch (thisobj.otype) {
483			case OBJ_FACE:
484			my_face(&thisobj, &thisillum, nm);
485			break;
486			case OBJ_SPHERE:
487			my_sphere(&thisobj, &thisillum, nm);
488			break;
489			case OBJ_RING:
490			my_ring(&thisobj, &thisillum, nm);
491			break;
492			default:
493			my_default(&thisobj, &thisillum, nm);
494			break;
495			}
496	greg	1.2	else
497			printobj(thisillum.altmat, &thisobj);
498			/* free arguments */
499			freefargs(&thisobj.oargs);
500			return;
501			readerr:
502	greg	2.28	sprintf(errmsg, "(%s): error reading input", nm);
503	greg	1.2	error(USER, errmsg);
504			}