void
rad2mgf( /* convert a Radiance file to MGF */
char *inp
)
{
char buf[512];
char mod[128], typ[32], id[128], alias[128];
FUNARGS fa;
register FILE *fp;
register int c;
if (inp == NULL) {
inp = "standard input";
fp = stdin;
} else if (inp[0] == '!') {
if ((fp = popen(inp+1, "r")) == NULL) {
fputs(inp, stderr);
fputs(": cannot execute\n", stderr);
exit(1);
}
} else if ((fp = fopen(inp, "r")) == NULL) {
fputs(inp, stderr);
fputs(": cannot open\n", stderr);
exit(1);
}
printf("# Begin conversion from: %s\n", inp);
while ((c = getc(fp)) != EOF)
switch (c) {
case ' ': /* white space */
case '\t':
case '\n':
case '\r':
case '\f':
break;
case '#': /* comment */
if (fgets(buf, sizeof(buf), fp) != NULL)
printf("# %s", buf);
break;
case '!': /* inline command */
ungetc(c, fp);
fgetline(buf, sizeof(buf), fp);
rad2mgf(buf);
break;
default: /* Radiance primitive */
ungetc(c, fp);
if (fgetword(mod, sizeof(mod), fp) == NULL ||
fgetword(typ, sizeof(typ), fp) == NULL ||
fgetword(id, sizeof(id), fp) == NULL) {
fputs(inp, stderr);
fputs(": unexpected EOF\n", stderr);
exit(1);
}
unspace(mod);
unspace(id);
if (!strcmp(typ, "alias")) {
strcpy(alias, "EOF");
fgetword(alias, sizeof(alias), fp);
unspace(alias);
newmat(id, alias);
} else {
if (!readfargs(&fa, fp)) {
fprintf(stderr,
"%s: bad argument syntax for %s \"%s\"\n",
inp, typ, id);
exit(1);
}
cvtprim(inp, mod, typ, id, &fa);
freefargs(&fa);
}
break;
}
printf("# End conversion from: %s\n", inp);
if (inp[0] == '!')
pclose(fp);
else
fclose(fp);
}
void
getobject( /* read the next object */
char *name,
FILE *fp
)
{
#define OALIAS -2
OBJECT obj;
char sbuf[MAXSTR];
int rval;
OBJREC *objp;
if ((obj = newobject()) == OVOID)
error(SYSTEM, "out of object space");
objp = objptr(obj);
/* get modifier */
strcpy(sbuf, "EOF");
fgetword(sbuf, MAXSTR, fp);
if (strchr(sbuf, '\t')) {
sprintf(errmsg, "(%s): illegal tab in modifier \"%s\"",
name, sbuf);
error(USER, errmsg);
}
if (!strcmp(sbuf, VOIDID))
objp->omod = OVOID;
else if (!strcmp(sbuf, ALIASMOD))
objp->omod = OALIAS;
else if ((objp->omod = modifier(sbuf)) == OVOID) {
sprintf(errmsg, "(%s): undefined modifier \"%s\"", name, sbuf);
error(USER, errmsg);
}
/* get type */
strcpy(sbuf, "EOF");
fgetword(sbuf, MAXSTR, fp);
if ((objp->otype = otype(sbuf)) < 0) {
sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf);
error(USER, errmsg);
}
/* get identifier */
sbuf[0] = '\0';
fgetword(sbuf, MAXSTR, fp);
if (strchr(sbuf, '\t')) {
sprintf(errmsg, "(%s): illegal tab in identifier \"%s\"",
name, sbuf);
error(USER, errmsg);
}
objp->oname = savqstr(sbuf);
/* get arguments */
if (objp->otype == MOD_ALIAS) {
OBJECT alias;
strcpy(sbuf, "EOF");
fgetword(sbuf, MAXSTR, fp);
if ((alias = modifier(sbuf)) == OVOID) {
sprintf(errmsg, "(%s): bad reference \"%s\"",
name, sbuf);
objerror(objp, USER, errmsg);
}
if (objp->omod == OALIAS ||
objp->omod == objptr(alias)->omod) {
objp->omod = alias;
} else {
objp->oargs.sarg = (char **)malloc(sizeof(char *));
if (objp->oargs.sarg == NULL)
error(SYSTEM, "out of memory in getobject");
objp->oargs.nsargs = 1;
objp->oargs.sarg[0] = savestr(sbuf);
}
} else if ((rval = readfargs(&objp->oargs, fp)) == 0) {
sprintf(errmsg, "(%s): bad arguments", name);
objerror(objp, USER, errmsg);
} else if (rval < 0) {
sprintf(errmsg, "(%s): error reading scene", name);
error(SYSTEM, errmsg);
}
if (objp->omod == OALIAS) {
sprintf(errmsg, "(%s): inappropriate use of '%s' modifier",
name, ALIASMOD);
objerror(objp, USER, errmsg);
}
/* initialize */
objp->os = NULL;
insertobject(obj); /* add to global structure */
#undef OALIAS
}
