src/gen/mkillum.c

#ifndef lint
static const char RCSid[] = "$Id: mkillum.c,v 2.15 2003/06/27 22:27:45 greg Exp $";
#endif
/*
 * Make illum sources for optimizing rendering process
 */

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

#include  "mkillum.h"
#include  "platform.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:	2.16
Committed:	Mon Jul 21 22:30:18 2003 UTC (20 years, 9 months ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.15:	+3 -2 lines
Log Message:	Eliminated copystruct() macro, which is unnecessary in ANSI. Reduced ambiguity warnings for nested if/if/else clauses.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.16	static const char RCSid[] = "$Id: mkillum.c,v 2.15 2003/06/27 22:27:45 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	2.15	#include "mkillum.h"
12	schorsch	2.13	#include "platform.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			/* rtrace command and defaults */
26	greg	2.5	char *rtargv[64] = { "rtrace", "-dj", ".25", "-dr", "3", "-dv-",
27	greg	1.4	"-ab", "2", "-ad", "256", "-as", "128", "-aa", ".15", };
28			int rtargc = 14;
29	greg	1.1	/* overriding rtrace options */
30	gregl	2.10	char *myrtopts[] = { "-I-", "-i-", "-ld-", "-ov", "-h-",
31			"-fff", "-y", "0", NULL };
32	greg	1.1
33	greg	1.2	struct rtproc rt; /* our rtrace process */
34	greg	1.1
35	greg	1.2	struct illum_args thisillum = { /* our illum and default values */
36			0,
37			DFLMAT,
38	greg	1.10	DFLDAT,
39	greg	1.2	0,
40			VOIDID,
41	greg	1.3	SAMPDENS,
42	greg	1.2	NSAMPS,
43	greg	1.12	0.,
44	greg	1.2	};
45	greg	1.1
46			char matcheck[MAXSTR]; /* current material to include or exclude */
47			int matselect = S_ALL; /* selection criterion */
48
49	greg	1.2	FUN ofun[NUMOTYPE] = INIT_OTYPE; /* object types */
50	greg	1.1
51			int gargc; /* global argc */
52			char *gargv; / global argv */
53			#define progname gargv[0]
54
55			int doneheader = 0; /* printed header yet? */
56	greg	1.2	#define checkhead() if (!doneheader++) printhead(gargc,gargv)
57	greg	1.1
58	greg	1.2	int warnings = 1; /* print warnings? */
59
60	greg	1.1
61			main(argc, argv) /* compute illum distributions using rtrace */
62			int argc;
63			char *argv[];
64			{
65			char *rtpath;
66	greg	1.3	FILE *fp;
67	greg	1.1	register int i;
68			/* set global arguments */
69	greg	1.3	gargv = argv;
70	greg	1.1	/* set up rtrace command */
71	greg	1.3	for (i = 1; i < argc; i++) {
72	greg	2.6	if (argv[i][0] == '<' && argv[i][1] == '\0')
73	greg	1.3	break;
74	greg	1.1	rtargv[rtargc++] = argv[i];
75	greg	1.2	if (argv[i][0] == '-' && argv[i][1] == 'w')
76	greg	2.6	switch (argv[i][2]) {
77			case '\0':
78			warnings = !warnings;
79			break;
80			case '+':
81			case 'T': case 't':
82			case 'Y': case 'y':
83			case '1':
84			warnings = 1;
85			break;
86			case '-':
87			case 'F': case 'f':
88			case 'N': case 'n':
89			case '0':
90			warnings = 0;
91			break;
92			}
93	greg	1.2	}
94	greg	2.3	gargc = i;
95	greg	1.3	rtargc--;
96	greg	1.1	for (i = 0; myrtopts[i] != NULL; i++)
97			rtargv[rtargc++] = myrtopts[i];
98	greg	1.3	rtargv[rtargc++] = argv[gargc-1];
99	greg	1.1	rtargv[rtargc] = NULL;
100			/* just asking for defaults? */
101	greg	1.3	if (!strcmp(argv[gargc-1], "-defaults")) {
102	greg	1.9	printopts(); fflush(stdout);
103	greg	1.1	rtpath = getpath(rtargv[0], getenv("PATH"), X_OK);
104			if (rtpath == NULL) {
105			eputs(rtargv[0]);
106			eputs(": command not found\n");
107			exit(1);
108			}
109			execv(rtpath, rtargv);
110			perror(rtpath);
111			exit(1);
112			}
113	greg	2.3	if (gargc < 2 \|\| argv[gargc-1][0] == '-')
114			error(USER, "missing octree argument");
115	greg	1.1	/* else initialize and run our calculation */
116			init();
117	greg	1.3	if (gargc+1 < argc)
118			for (i = gargc+1; i < argc; i++) {
119	greg	1.5	if ((fp = fopen(argv[i], "r")) == NULL) {
120	greg	1.3	sprintf(errmsg,
121			"cannot open scene file \"%s\"", argv[i]);
122			error(SYSTEM, errmsg);
123			}
124			filter(fp, argv[i]);
125			fclose(fp);
126			}
127			else
128			filter(stdin, "standard input");
129	greg	1.2	quit(0);
130	greg	1.1	}
131
132
133	greg	2.11	void
134	greg	1.3	quit(status) /* exit with status */
135			int status;
136			{
137			int rtstat;
138
139	schorsch	2.14	rtstat = close_process(&(rt.pd));
140	schorsch	2.16	if (status == 0) {
141	greg	1.3	if (rtstat < 0)
142			error(WARNING,
143			"unknown return status from rtrace process");
144			else
145			status = rtstat;
146	schorsch	2.16	}
147	greg	1.3	exit(status);
148			}
149
150
151	greg	1.1	init() /* start rtrace and set up buffers */
152			{
153	greg	1.4	extern int o_face(), o_sphere(), o_ring();
154	greg	1.1	int maxbytes;
155	greg	1.3	/* set up object functions */
156			ofun[OBJ_FACE].funp = o_face;
157	greg	1.4	ofun[OBJ_SPHERE].funp = o_sphere;
158	greg	1.3	ofun[OBJ_RING].funp = o_ring;
159			/* set up signal handling */
160	schorsch	2.14	#ifdef SIGPIPE /* not present on Windows */
161	greg	1.3	signal(SIGPIPE, quit);
162	schorsch	2.13	#endif
163	greg	1.3	/* start rtrace process */
164	greg	1.14	errno = 0;
165	schorsch	2.14	maxbytes = open_process(&(rt.pd), rtargv);
166	greg	1.1	if (maxbytes == 0) {
167			eputs(rtargv[0]);
168			eputs(": command not found\n");
169			exit(1);
170			}
171			if (maxbytes < 0)
172			error(SYSTEM, "cannot start rtrace process");
173	greg	1.2	rt.bsiz = maxbytes/(6*sizeof(float));
174	greg	1.4	rt.buf = (float )malloc(6sizeof(float)*rt.bsiz--);
175			rt.dest = (float *)malloc(sizeof(float )*rt.bsiz);
176			if (rt.buf == NULL \|\| rt.dest == NULL)
177	greg	1.1	error(SYSTEM, "out of memory in init");
178	greg	1.2	rt.nrays = 0;
179	greg	1.6	/* set up urand */
180	greg	2.7	initurand(16384);
181	greg	1.1	}
182
183
184	greg	2.11	void
185	greg	1.1	eputs(s) /* put string to stderr */
186			register char *s;
187			{
188			static int midline = 0;
189
190			if (!*s) return;
191			if (!midline) {
192			fputs(progname, stderr);
193			fputs(": ", stderr);
194			}
195			fputs(s, stderr);
196			midline = s[strlen(s)-1] != '\n';
197			}
198
199
200	greg	2.11	void
201	greg	1.2	wputs(s) /* print warning if enabled */
202			char *s;
203			{
204			if (warnings)
205			eputs(s);
206			}
207
208
209			filter(infp, name) /* process stream */
210	greg	1.1	register FILE *infp;
211			char *name;
212			{
213			char buf[512];
214			FILE *pfp;
215			register int c;
216
217			while ((c = getc(infp)) != EOF) {
218			if (isspace(c))
219			continue;
220			if (c == '#') { /* comment/options */
221			buf[0] = c;
222			fgets(buf+1, sizeof(buf)-1, infp);
223	greg	1.2	xoptions(buf, name);
224	greg	1.1	} else if (c == '!') { /* command */
225			buf[0] = c;
226			fgetline(buf+1, sizeof(buf)-1, infp);
227			if ((pfp = popen(buf+1, "r")) == NULL) {
228			sprintf(errmsg, "cannot execute \"%s\"", buf);
229			error(SYSTEM, errmsg);
230			}
231	greg	1.2	filter(pfp, buf);
232	greg	1.1	pclose(pfp);
233			} else { /* object */
234			ungetc(c, infp);
235			xobject(infp, name);
236			}
237			}
238			}
239
240
241	greg	1.2	xoptions(s, nm) /* process options in string s */
242	greg	1.1	char *s;
243			char *nm;
244			{
245			extern FILE *freopen();
246			char buf[64];
247			int nerrs = 0;
248			register char *cp;
249
250	greg	1.2	if (strncmp(s, "#@mkillum", 9) \|\| !isspace(s[9])) {
251			fputs(s, stdout); /* not for us */
252	greg	1.1	return;
253	greg	1.2	}
254	greg	1.1	cp = s+10;
255			while (*cp) {
256			switch (*cp) {
257			case ' ':
258			case '\t':
259			case '\n':
260	greg	2.11	case '\r':
261			case '\f':
262	greg	1.1	cp++;
263			continue;
264			case 'm': /* material name */
265	greg	1.2	if (*++cp != '=')
266	greg	1.1	break;
267	greg	2.8	if (!++cp \|\| isspace(cp))
268	greg	1.2	break;
269	greg	1.1	atos(thisillum.matname, MAXSTR, cp);
270			cp = sskip(cp);
271			if (!(thisillum.flags & IL_DATCLB)) {
272			strcpy(thisillum.datafile, thisillum.matname);
273			thisillum.dfnum = 0;
274			}
275			continue;
276			case 'f': /* data file name */
277	greg	1.2	if (*++cp != '=')
278	greg	1.1	break;
279	greg	2.8	if (!++cp \|\| isspace(cp)) {
280	greg	1.6	strcpy(thisillum.datafile,thisillum.matname);
281	greg	1.10	thisillum.dfnum = 0;
282	greg	1.1	thisillum.flags &= ~IL_DATCLB;
283			continue;
284			}
285			atos(thisillum.datafile, MAXSTR, cp);
286			cp = sskip(cp);
287			thisillum.dfnum = 0;
288			thisillum.flags \|= IL_DATCLB;
289			continue;
290			case 'i': /* include material */
291			case 'e': /* exclude material */
292	greg	1.6	if (cp[1] != '=')
293	greg	1.1	break;
294	greg	1.7	matselect = (*cp == 'i') ? S_ELEM : S_COMPL;
295			cp += 2;
296			atos(matcheck, MAXSTR, cp);
297	greg	1.1	cp = sskip(cp);
298			continue;
299			case 'a': /* use everything */
300			cp = sskip(cp);
301			matselect = S_ALL;
302			continue;
303			case 'n': /* use nothing (passive) */
304			cp = sskip(cp);
305			matselect = S_NONE;
306			continue;
307			case 'c': /* color calculation */
308	greg	1.2	if (*++cp != '=')
309	greg	1.1	break;
310	greg	1.2	switch (*++cp) {
311	greg	1.1	case 'a': /* average */
312	greg	1.6	thisillum.flags = (thisillum.flags\|IL_COLAVG)
313			& ~IL_COLDST;
314	greg	1.1	break;
315			case 'd': /* distribution */
316	greg	1.5	thisillum.flags \|= (IL_COLDST\|IL_COLAVG);
317	greg	1.1	break;
318			case 'n': /* none */
319			thisillum.flags &= ~(IL_COLAVG\|IL_COLDST);
320			break;
321			default:
322			goto opterr;
323			}
324			cp = sskip(cp);
325			continue;
326			case 'd': /* point sample density */
327	greg	1.2	if (*++cp != '=')
328	greg	1.1	break;
329	greg	2.11	if (!isintd(++cp, " \t\n\r"))
330	greg	1.1	break;
331	greg	1.3	thisillum.sampdens = atoi(cp);
332	greg	1.1	cp = sskip(cp);
333			continue;
334			case 's': /* point super-samples */
335	greg	1.2	if (*++cp != '=')
336	greg	1.1	break;
337	greg	2.11	if (!isintd(++cp, " \t\n\r"))
338	greg	1.1	break;
339			thisillum.nsamps = atoi(cp);
340			cp = sskip(cp);
341			continue;
342	greg	1.3	case 'l': /* light sources */
343	greg	1.4	cp++;
344			if (*cp == '+')
345	greg	1.3	thisillum.flags \|= IL_LIGHT;
346	greg	1.4	else if (*cp == '-')
347			thisillum.flags &= ~IL_LIGHT;
348	greg	1.3	else
349	greg	1.4	break;
350			cp++;
351	greg	1.3	continue;
352	greg	1.12	case 'b': /* brightness */
353			if (*++cp != '=')
354			break;
355	greg	2.11	if (!isfltd(++cp, " \t\n\r"))
356	greg	1.12	break;
357			thisillum.minbrt = atof(cp);
358	greg	1.13	if (thisillum.minbrt < 0.)
359			thisillum.minbrt = 0.;
360	greg	1.12	cp = sskip(cp);
361			continue;
362	greg	1.1	case 'o': /* output file */
363	greg	1.2	if (*++cp != '=')
364	greg	1.1	break;
365	greg	2.8	if (!++cp \|\| isspace(cp))
366	greg	1.2	break;
367	greg	1.1	atos(buf, sizeof(buf), cp);
368			cp = sskip(cp);
369			if (freopen(buf, "w", stdout) == NULL) {
370			sprintf(errmsg,
371			"cannot open output file \"%s\"", buf);
372			error(SYSTEM, errmsg);
373			}
374			doneheader = 0;
375			continue;
376	greg	1.6	case '!': /* processed file! */
377	greg	1.7	sprintf(errmsg, "(%s): already processed!", nm);
378	greg	1.6	error(WARNING, errmsg);
379	greg	1.7	matselect = S_NONE;
380	greg	1.6	return;
381	greg	1.1	}
382			opterr: /* skip faulty option */
383	greg	2.9	while (cp && !isspace(cp))
384			cp++;
385	greg	1.1	nerrs++;
386			}
387	greg	1.2	/* print header? */
388			checkhead();
389			/* issue warnings? */
390	greg	1.1	if (nerrs) {
391			sprintf(errmsg, "(%s): %d error(s) in option line:",
392			nm, nerrs);
393			error(WARNING, errmsg);
394	greg	1.2	wputs(s);
395			printf("# %s: the following option line has %d error(s):\n",
396			progname, nerrs);
397	greg	1.1	}
398	greg	1.2	/* print pure comment */
399	greg	1.4	printf("# %s", s+2);
400	greg	1.9	}
401
402
403			printopts() /* print out option default values */
404			{
405	greg	1.11	printf("m=%-15s\t\t# material name\n", thisillum.matname);
406			printf("f=%-15s\t\t# data file name\n", thisillum.datafile);
407	greg	2.2	if (thisillum.flags & IL_COLAVG)
408			if (thisillum.flags & IL_COLDST)
409			printf("c=d\t\t\t\t# color distribution\n");
410			else
411			printf("c=a\t\t\t\t# color average\n");
412			else
413			printf("c=n\t\t\t\t# color none\n");
414			if (thisillum.flags & IL_LIGHT)
415			printf("l+\t\t\t\t# light type on\n");
416			else
417			printf("l-\t\t\t\t# light type off\n");
418	greg	1.9	printf("d=%d\t\t\t\t# density of points\n", thisillum.sampdens);
419			printf("s=%d\t\t\t\t# samples per point\n", thisillum.nsamps);
420	greg	1.12	printf("b=%f\t\t\t# minimum average brightness\n", thisillum.minbrt);
421	greg	1.1	}
422	greg	1.2
423
424			printhead(ac, av) /* print out header */
425			register int ac;
426			register char **av;
427			{
428			putchar('#');
429			while (ac-- > 0) {
430			putchar(' ');
431			fputs(*av++, stdout);
432			}
433	greg	1.6	fputs("\n#@mkillum !\n", stdout);
434	greg	1.2	}
435
436
437			xobject(fp, nm) /* translate an object from fp */
438			FILE *fp;
439			char *nm;
440			{
441			OBJREC thisobj;
442			char str[MAXSTR];
443			int doit;
444			/* read the object */
445			if (fgetword(thisillum.altmat, MAXSTR, fp) == NULL)
446			goto readerr;
447			if (fgetword(str, MAXSTR, fp) == NULL)
448			goto readerr;
449			/* is it an alias? */
450	greg	2.12	if (!strcmp(str, ALIASKEY)) {
451	greg	1.2	if (fgetword(str, MAXSTR, fp) == NULL)
452			goto readerr;
453	greg	2.12	printf("\n%s %s %s", thisillum.altmat, ALIASKEY, str);
454	greg	1.2	if (fgetword(str, MAXSTR, fp) == NULL)
455			goto readerr;
456	greg	1.4	printf("\t%s\n", str);
457	greg	1.2	return;
458			}
459	greg	1.4	thisobj.omod = OVOID; /* unused field */
460	greg	1.2	if ((thisobj.otype = otype(str)) < 0) {
461			sprintf(errmsg, "(%s): unknown type \"%s\"", nm, str);
462			error(USER, errmsg);
463			}
464			if (fgetword(str, MAXSTR, fp) == NULL)
465			goto readerr;
466			thisobj.oname = str;
467			if (readfargs(&thisobj.oargs, fp) != 1)
468			goto readerr;
469			thisobj.os = NULL;
470			/* check for translation */
471			switch (matselect) {
472			case S_NONE:
473			doit = 0;
474			break;
475			case S_ALL:
476	greg	1.4	doit = 1;
477	greg	1.2	break;
478			case S_ELEM:
479			doit = !strcmp(thisillum.altmat, matcheck);
480			break;
481			case S_COMPL:
482			doit = strcmp(thisillum.altmat, matcheck);
483			break;
484			}
485	greg	1.4	doit = doit && issurface(thisobj.otype);
486	greg	1.2	/* print header? */
487			checkhead();
488			/* process object */
489			if (doit)
490	greg	1.4	(*ofun[thisobj.otype].funp)(&thisobj, &thisillum, &rt, nm);
491	greg	1.2	else
492			printobj(thisillum.altmat, &thisobj);
493			/* free arguments */
494			freefargs(&thisobj.oargs);
495			return;
496			readerr:
497			sprintf(errmsg, "(%s): error reading scene", nm);
498			error(USER, errmsg);
499			}