src/gen/mkillum.c

#ifndef lint
static const char RCSid[] = "$Id: mkillum.c,v 2.13 2003/06/08 12:03:10 schorsch Exp $";
#endif
/*
 * Make illum sources for optimizing rendering process
 */

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

#include  "standard.h"
#include  "platform.h"
#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 */

                                /* rtrace command and defaults */
char  *rtargv[64] = { "rtrace", "-dj", ".25", "-dr", "3", "-dv-",
                "-ab", "2", "-ad", "256", "-as", "128", "-aa", ".15", };
int  rtargc = 14;
                                /* overriding rtrace options */
char  *myrtopts[] = { "-I-", "-i-", "-ld-", "-ov", "-h-",
                        "-fff", "-y", "0", 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? */


main(argc, argv)                /* compute illum distributions using rtrace */
int     argc;
char    *argv[];
{
        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] == '\0')
                        break;
                rtargv[rtargc++] = argv[i];
                if (argv[i][0] == '-' && argv[i][1] == 'w')
                        switch (argv[i][2]) {
                        case '\0':
                                warnings = !warnings;
                                break;
                        case '+':
                        case 'T': case 't':
                        case 'Y': case 'y':
                        case '1':
                                warnings = 1;
                                break;
                        case '-':
                        case 'F': case 'f':
                        case 'N': case 'n':
                        case '0':
                                warnings = 0;
                                break;
                        }
        }
        gargc = i;
        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);
        }
        if (gargc < 2 || argv[gargc-1][0] == '-')
                error(USER, "missing octree argument");
                                /* 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);
}


void
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 */
#ifdef SIGPIPE /* not present on Windows */
        signal(SIGPIPE, quit);
#endif
                                        /* 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(16384);
}


void
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';
}


void
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':
                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':                       /* point sample density */
                        if (*++cp != '=')
                                break;
                        if (!isintd(++cp, " \t\n\r"))
                                break;
                        thisillum.sampdens = atoi(cp);
                        cp = sskip(cp);
                        continue;
                case 's':                       /* point 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);
}


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);
        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 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, 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)
                (*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:	2.14
Committed:	Thu Jun 26 00:58:09 2003 UTC (20 years, 9 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.13:	+5 -4 lines
Log Message:	Abstracted process and path handling for Windows. Renamed FLOAT to RREAL because of conflict on Windows. Added conditional compiles for some signal handlers.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.14	static const char RCSid[] = "$Id: mkillum.c,v 2.13 2003/06/08 12:03:10 schorsch 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			#include <stdio.h>
11	greg	1.3
12	schorsch	2.14	#include "standard.h"
13	schorsch	2.13	#include "platform.h"
14			#include "mkillum.h"
15	greg	1.1
16			/* default parameters */
17	greg	1.8	#define SAMPDENS 48 /* points per projected steradian */
18	greg	1.1	#define NSAMPS 32 /* samples per point */
19			#define DFLMAT "illum_mat" /* material name */
20	greg	1.10	#define DFLDAT "illum" /* data file name */
21	greg	1.1	/* 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	2.5	char *rtargv[64] = { "rtrace", "-dj", ".25", "-dr", "3", "-dv-",
29	greg	1.4	"-ab", "2", "-ad", "256", "-as", "128", "-aa", ".15", };
30			int rtargc = 14;
31	greg	1.1	/* overriding rtrace options */
32	gregl	2.10	char *myrtopts[] = { "-I-", "-i-", "-ld-", "-ov", "-h-",
33			"-fff", "-y", "0", 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
63			main(argc, argv) /* compute illum distributions using rtrace */
64			int argc;
65			char *argv[];
66			{
67			char *rtpath;
68	greg	1.3	FILE *fp;
69	greg	1.1	register int i;
70			/* set global arguments */
71	greg	1.3	gargv = argv;
72	greg	1.1	/* set up rtrace command */
73	greg	1.3	for (i = 1; i < argc; i++) {
74	greg	2.6	if (argv[i][0] == '<' && argv[i][1] == '\0')
75	greg	1.3	break;
76	greg	1.1	rtargv[rtargc++] = argv[i];
77	greg	1.2	if (argv[i][0] == '-' && argv[i][1] == 'w')
78	greg	2.6	switch (argv[i][2]) {
79			case '\0':
80			warnings = !warnings;
81			break;
82			case '+':
83			case 'T': case 't':
84			case 'Y': case 'y':
85			case '1':
86			warnings = 1;
87			break;
88			case '-':
89			case 'F': case 'f':
90			case 'N': case 'n':
91			case '0':
92			warnings = 0;
93			break;
94			}
95	greg	1.2	}
96	greg	2.3	gargc = i;
97	greg	1.3	rtargc--;
98	greg	1.1	for (i = 0; myrtopts[i] != NULL; i++)
99			rtargv[rtargc++] = myrtopts[i];
100	greg	1.3	rtargv[rtargc++] = argv[gargc-1];
101	greg	1.1	rtargv[rtargc] = NULL;
102			/* just asking for defaults? */
103	greg	1.3	if (!strcmp(argv[gargc-1], "-defaults")) {
104	greg	1.9	printopts(); fflush(stdout);
105	greg	1.1	rtpath = getpath(rtargv[0], getenv("PATH"), X_OK);
106			if (rtpath == NULL) {
107			eputs(rtargv[0]);
108			eputs(": command not found\n");
109			exit(1);
110			}
111			execv(rtpath, rtargv);
112			perror(rtpath);
113			exit(1);
114			}
115	greg	2.3	if (gargc < 2 \|\| argv[gargc-1][0] == '-')
116			error(USER, "missing octree argument");
117	greg	1.1	/* else initialize and run our calculation */
118			init();
119	greg	1.3	if (gargc+1 < argc)
120			for (i = gargc+1; i < argc; i++) {
121	greg	1.5	if ((fp = fopen(argv[i], "r")) == NULL) {
122	greg	1.3	sprintf(errmsg,
123			"cannot open scene file \"%s\"", argv[i]);
124			error(SYSTEM, errmsg);
125			}
126			filter(fp, argv[i]);
127			fclose(fp);
128			}
129			else
130			filter(stdin, "standard input");
131	greg	1.2	quit(0);
132	greg	1.1	}
133
134
135	greg	2.11	void
136	greg	1.3	quit(status) /* exit with status */
137			int status;
138			{
139			int rtstat;
140
141	schorsch	2.14	rtstat = close_process(&(rt.pd));
142	greg	1.3	if (status == 0)
143			if (rtstat < 0)
144			error(WARNING,
145			"unknown return status from rtrace process");
146			else
147			status = rtstat;
148			exit(status);
149			}
150
151
152	greg	1.1	init() /* start rtrace and set up buffers */
153			{
154	greg	1.4	extern int o_face(), o_sphere(), o_ring();
155	greg	1.1	int maxbytes;
156	greg	1.3	/* set up object functions */
157			ofun[OBJ_FACE].funp = o_face;
158	greg	1.4	ofun[OBJ_SPHERE].funp = o_sphere;
159	greg	1.3	ofun[OBJ_RING].funp = o_ring;
160			/* set up signal handling */
161	schorsch	2.14	#ifdef SIGPIPE /* not present on Windows */
162	greg	1.3	signal(SIGPIPE, quit);
163	schorsch	2.13	#endif
164	greg	1.3	/* start rtrace process */
165	greg	1.14	errno = 0;
166	schorsch	2.14	maxbytes = open_process(&(rt.pd), rtargv);
167	greg	1.1	if (maxbytes == 0) {
168			eputs(rtargv[0]);
169			eputs(": command not found\n");
170			exit(1);
171			}
172			if (maxbytes < 0)
173			error(SYSTEM, "cannot start rtrace process");
174	greg	1.2	rt.bsiz = maxbytes/(6*sizeof(float));
175	greg	1.4	rt.buf = (float )malloc(6sizeof(float)*rt.bsiz--);
176			rt.dest = (float *)malloc(sizeof(float )*rt.bsiz);
177			if (rt.buf == NULL \|\| rt.dest == NULL)
178	greg	1.1	error(SYSTEM, "out of memory in init");
179	greg	1.2	rt.nrays = 0;
180	greg	1.6	/* set up urand */
181	greg	2.7	initurand(16384);
182	greg	1.1	}
183
184
185	greg	2.11	void
186	greg	1.1	eputs(s) /* put string to stderr */
187			register char *s;
188			{
189			static int midline = 0;
190
191			if (!*s) return;
192			if (!midline) {
193			fputs(progname, stderr);
194			fputs(": ", stderr);
195			}
196			fputs(s, stderr);
197			midline = s[strlen(s)-1] != '\n';
198			}
199
200
201	greg	2.11	void
202	greg	1.2	wputs(s) /* print warning if enabled */
203			char *s;
204			{
205			if (warnings)
206			eputs(s);
207			}
208
209
210			filter(infp, name) /* process stream */
211	greg	1.1	register FILE *infp;
212			char *name;
213			{
214			char buf[512];
215			FILE *pfp;
216			register int c;
217
218			while ((c = getc(infp)) != EOF) {
219			if (isspace(c))
220			continue;
221			if (c == '#') { /* comment/options */
222			buf[0] = c;
223			fgets(buf+1, sizeof(buf)-1, infp);
224	greg	1.2	xoptions(buf, name);
225	greg	1.1	} else if (c == '!') { /* command */
226			buf[0] = c;
227			fgetline(buf+1, sizeof(buf)-1, infp);
228			if ((pfp = popen(buf+1, "r")) == NULL) {
229			sprintf(errmsg, "cannot execute \"%s\"", buf);
230			error(SYSTEM, errmsg);
231			}
232	greg	1.2	filter(pfp, buf);
233	greg	1.1	pclose(pfp);
234			} else { /* object */
235			ungetc(c, infp);
236			xobject(infp, name);
237			}
238			}
239			}
240
241
242	greg	1.2	xoptions(s, nm) /* process options in string s */
243	greg	1.1	char *s;
244			char *nm;
245			{
246			extern FILE *freopen();
247			char buf[64];
248			int nerrs = 0;
249			register char *cp;
250
251	greg	1.2	if (strncmp(s, "#@mkillum", 9) \|\| !isspace(s[9])) {
252			fputs(s, stdout); /* not for us */
253	greg	1.1	return;
254	greg	1.2	}
255	greg	1.1	cp = s+10;
256			while (*cp) {
257			switch (*cp) {
258			case ' ':
259			case '\t':
260			case '\n':
261	greg	2.11	case '\r':
262			case '\f':
263	greg	1.1	cp++;
264			continue;
265			case 'm': /* material name */
266	greg	1.2	if (*++cp != '=')
267	greg	1.1	break;
268	greg	2.8	if (!++cp \|\| isspace(cp))
269	greg	1.2	break;
270	greg	1.1	atos(thisillum.matname, MAXSTR, cp);
271			cp = sskip(cp);
272			if (!(thisillum.flags & IL_DATCLB)) {
273			strcpy(thisillum.datafile, thisillum.matname);
274			thisillum.dfnum = 0;
275			}
276			continue;
277			case 'f': /* data file name */
278	greg	1.2	if (*++cp != '=')
279	greg	1.1	break;
280	greg	2.8	if (!++cp \|\| isspace(cp)) {
281	greg	1.6	strcpy(thisillum.datafile,thisillum.matname);
282	greg	1.10	thisillum.dfnum = 0;
283	greg	1.1	thisillum.flags &= ~IL_DATCLB;
284			continue;
285			}
286			atos(thisillum.datafile, MAXSTR, cp);
287			cp = sskip(cp);
288			thisillum.dfnum = 0;
289			thisillum.flags \|= IL_DATCLB;
290			continue;
291			case 'i': /* include material */
292			case 'e': /* exclude material */
293	greg	1.6	if (cp[1] != '=')
294	greg	1.1	break;
295	greg	1.7	matselect = (*cp == 'i') ? S_ELEM : S_COMPL;
296			cp += 2;
297			atos(matcheck, MAXSTR, cp);
298	greg	1.1	cp = sskip(cp);
299			continue;
300			case 'a': /* use everything */
301			cp = sskip(cp);
302			matselect = S_ALL;
303			continue;
304			case 'n': /* use nothing (passive) */
305			cp = sskip(cp);
306			matselect = S_NONE;
307			continue;
308			case 'c': /* color calculation */
309	greg	1.2	if (*++cp != '=')
310	greg	1.1	break;
311	greg	1.2	switch (*++cp) {
312	greg	1.1	case 'a': /* average */
313	greg	1.6	thisillum.flags = (thisillum.flags\|IL_COLAVG)
314			& ~IL_COLDST;
315	greg	1.1	break;
316			case 'd': /* distribution */
317	greg	1.5	thisillum.flags \|= (IL_COLDST\|IL_COLAVG);
318	greg	1.1	break;
319			case 'n': /* none */
320			thisillum.flags &= ~(IL_COLAVG\|IL_COLDST);
321			break;
322			default:
323			goto opterr;
324			}
325			cp = sskip(cp);
326			continue;
327			case 'd': /* point sample density */
328	greg	1.2	if (*++cp != '=')
329	greg	1.1	break;
330	greg	2.11	if (!isintd(++cp, " \t\n\r"))
331	greg	1.1	break;
332	greg	1.3	thisillum.sampdens = atoi(cp);
333	greg	1.1	cp = sskip(cp);
334			continue;
335			case 's': /* point super-samples */
336	greg	1.2	if (*++cp != '=')
337	greg	1.1	break;
338	greg	2.11	if (!isintd(++cp, " \t\n\r"))
339	greg	1.1	break;
340			thisillum.nsamps = atoi(cp);
341			cp = sskip(cp);
342			continue;
343	greg	1.3	case 'l': /* light sources */
344	greg	1.4	cp++;
345			if (*cp == '+')
346	greg	1.3	thisillum.flags \|= IL_LIGHT;
347	greg	1.4	else if (*cp == '-')
348			thisillum.flags &= ~IL_LIGHT;
349	greg	1.3	else
350	greg	1.4	break;
351			cp++;
352	greg	1.3	continue;
353	greg	1.12	case 'b': /* brightness */
354			if (*++cp != '=')
355			break;
356	greg	2.11	if (!isfltd(++cp, " \t\n\r"))
357	greg	1.12	break;
358			thisillum.minbrt = atof(cp);
359	greg	1.13	if (thisillum.minbrt < 0.)
360			thisillum.minbrt = 0.;
361	greg	1.12	cp = sskip(cp);
362			continue;
363	greg	1.1	case 'o': /* output file */
364	greg	1.2	if (*++cp != '=')
365	greg	1.1	break;
366	greg	2.8	if (!++cp \|\| isspace(cp))
367	greg	1.2	break;
368	greg	1.1	atos(buf, sizeof(buf), cp);
369			cp = sskip(cp);
370			if (freopen(buf, "w", stdout) == NULL) {
371			sprintf(errmsg,
372			"cannot open output file \"%s\"", buf);
373			error(SYSTEM, errmsg);
374			}
375			doneheader = 0;
376			continue;
377	greg	1.6	case '!': /* processed file! */
378	greg	1.7	sprintf(errmsg, "(%s): already processed!", nm);
379	greg	1.6	error(WARNING, errmsg);
380	greg	1.7	matselect = S_NONE;
381	greg	1.6	return;
382	greg	1.1	}
383			opterr: /* skip faulty option */
384	greg	2.9	while (cp && !isspace(cp))
385			cp++;
386	greg	1.1	nerrs++;
387			}
388	greg	1.2	/* print header? */
389			checkhead();
390			/* issue warnings? */
391	greg	1.1	if (nerrs) {
392			sprintf(errmsg, "(%s): %d error(s) in option line:",
393			nm, nerrs);
394			error(WARNING, errmsg);
395	greg	1.2	wputs(s);
396			printf("# %s: the following option line has %d error(s):\n",
397			progname, nerrs);
398	greg	1.1	}
399	greg	1.2	/* print pure comment */
400	greg	1.4	printf("# %s", s+2);
401	greg	1.9	}
402
403
404			printopts() /* print out option default values */
405			{
406	greg	1.11	printf("m=%-15s\t\t# material name\n", thisillum.matname);
407			printf("f=%-15s\t\t# data file name\n", thisillum.datafile);
408	greg	2.2	if (thisillum.flags & IL_COLAVG)
409			if (thisillum.flags & IL_COLDST)
410			printf("c=d\t\t\t\t# color distribution\n");
411			else
412			printf("c=a\t\t\t\t# color average\n");
413			else
414			printf("c=n\t\t\t\t# color none\n");
415			if (thisillum.flags & IL_LIGHT)
416			printf("l+\t\t\t\t# light type on\n");
417			else
418			printf("l-\t\t\t\t# light type off\n");
419	greg	1.9	printf("d=%d\t\t\t\t# density of points\n", thisillum.sampdens);
420			printf("s=%d\t\t\t\t# samples per point\n", thisillum.nsamps);
421	greg	1.12	printf("b=%f\t\t\t# minimum average brightness\n", thisillum.minbrt);
422	greg	1.1	}
423	greg	1.2
424
425			printhead(ac, av) /* print out header */
426			register int ac;
427			register char **av;
428			{
429			putchar('#');
430			while (ac-- > 0) {
431			putchar(' ');
432			fputs(*av++, stdout);
433			}
434	greg	1.6	fputs("\n#@mkillum !\n", stdout);
435	greg	1.2	}
436
437
438			xobject(fp, nm) /* translate an object from fp */
439			FILE *fp;
440			char *nm;
441			{
442			OBJREC thisobj;
443			char str[MAXSTR];
444			int doit;
445			/* read the object */
446			if (fgetword(thisillum.altmat, MAXSTR, fp) == NULL)
447			goto readerr;
448			if (fgetword(str, MAXSTR, fp) == NULL)
449			goto readerr;
450			/* is it an alias? */
451	greg	2.12	if (!strcmp(str, ALIASKEY)) {
452	greg	1.2	if (fgetword(str, MAXSTR, fp) == NULL)
453			goto readerr;
454	greg	2.12	printf("\n%s %s %s", thisillum.altmat, ALIASKEY, str);
455	greg	1.2	if (fgetword(str, MAXSTR, fp) == NULL)
456			goto readerr;
457	greg	1.4	printf("\t%s\n", str);
458	greg	1.2	return;
459			}
460	greg	1.4	thisobj.omod = OVOID; /* unused field */
461	greg	1.2	if ((thisobj.otype = otype(str)) < 0) {
462			sprintf(errmsg, "(%s): unknown type \"%s\"", nm, str);
463			error(USER, errmsg);
464			}
465			if (fgetword(str, MAXSTR, fp) == NULL)
466			goto readerr;
467			thisobj.oname = str;
468			if (readfargs(&thisobj.oargs, fp) != 1)
469			goto readerr;
470			thisobj.os = NULL;
471			/* check for translation */
472			switch (matselect) {
473			case S_NONE:
474			doit = 0;
475			break;
476			case S_ALL:
477	greg	1.4	doit = 1;
478	greg	1.2	break;
479			case S_ELEM:
480			doit = !strcmp(thisillum.altmat, matcheck);
481			break;
482			case S_COMPL:
483			doit = strcmp(thisillum.altmat, matcheck);
484			break;
485			}
486	greg	1.4	doit = doit && issurface(thisobj.otype);
487	greg	1.2	/* print header? */
488			checkhead();
489			/* process object */
490			if (doit)
491	greg	1.4	(*ofun[thisobj.otype].funp)(&thisobj, &thisillum, &rt, nm);
492	greg	1.2	else
493			printobj(thisillum.altmat, &thisobj);
494			/* free arguments */
495			freefargs(&thisobj.oargs);
496			return;
497			readerr:
498			sprintf(errmsg, "(%s): error reading scene", nm);
499			error(USER, errmsg);
500			}