7 |
|
/* |
8 |
|
* Convert a Wavefront .obj file to Radiance format. |
9 |
|
* |
10 |
< |
* Currently, we support only polygonal geometry, and faces |
11 |
< |
* must be either quads or triangles for smoothing to work. |
10 |
> |
* Currently, we support only polygonal geometry. Non-planar |
11 |
> |
* faces are broken rather haphazardly into triangles. |
12 |
|
* Also, texture map indices only work for triangles, though |
13 |
|
* I'm not sure they work correctly. |
14 |
|
*/ |
69 |
|
|
70 |
|
char *defmat = DEFMAT; /* default (starting) material name */ |
71 |
|
char *defobj = DEFOBJ; /* default (starting) object name */ |
72 |
– |
int donames = 0; /* only get qualifier names */ |
72 |
|
|
73 |
|
char *getmtl(), *getonm(); |
74 |
|
|
76 |
|
char matname[64]; /* current material name */ |
77 |
|
char group[16][32]; /* current group names */ |
78 |
|
char objname[128]; /* current object name */ |
79 |
+ |
char *inpfile; /* input file name */ |
80 |
|
int lineno; /* current line number */ |
81 |
< |
int faceno; /* number of faces read */ |
81 |
> |
int faceno; /* current face number */ |
82 |
|
|
83 |
|
|
84 |
|
main(argc, argv) /* read in .obj file and convert */ |
85 |
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int argc; |
86 |
|
char *argv[]; |
87 |
|
{ |
88 |
< |
char *fname; |
88 |
> |
int donames = 0; |
89 |
|
int i; |
90 |
|
|
91 |
|
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
105 |
|
if (i > argc | i < argc-1) |
106 |
|
goto userr; |
107 |
|
if (i == argc) |
108 |
< |
fname = "<stdin>"; |
109 |
< |
else if (freopen(fname=argv[i], "r", stdin) == NULL) { |
110 |
< |
fprintf(stderr, "%s: cannot open\n", fname); |
108 |
> |
inpfile = "<stdin>"; |
109 |
> |
else if (freopen(inpfile=argv[i], "r", stdin) == NULL) { |
110 |
> |
fprintf(stderr, "%s: cannot open\n", inpfile); |
111 |
|
exit(1); |
112 |
|
} |
113 |
|
if (donames) { /* scan for ids */ |
114 |
|
getnames(stdin); |
115 |
< |
printf("filename \"%s\"\n", fname); |
115 |
> |
printf("filename \"%s\"\n", inpfile); |
116 |
|
printf("filetype \"Wavefront\"\n"); |
117 |
|
write_quals(&qlist, qual, stdout); |
118 |
|
printf("qualifier %s begin\n", qlist.qual[Q_FAC]); |
121 |
|
} else { /* translate file */ |
122 |
|
printf("# "); |
123 |
|
printargs(argc, argv, stdout); |
124 |
< |
convert(fname, stdin); |
124 |
> |
convert(stdin); |
125 |
|
} |
126 |
|
exit(0); |
127 |
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userr: |
180 |
|
} |
181 |
|
|
182 |
|
|
183 |
< |
convert(fname, fp) /* convert a T-mesh */ |
184 |
< |
char *fname; |
183 |
> |
convert(fp) /* convert a T-mesh */ |
184 |
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FILE *fp; |
185 |
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{ |
186 |
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char *argv[MAXARG]; |
187 |
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int argc; |
188 |
|
int nstats, nunknown; |
189 |
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register int i; |
190 |
< |
/* start fresh */ |
192 |
< |
freeverts(); |
193 |
< |
mapname[0] = '\0'; |
194 |
< |
strcpy(matname, defmat); |
195 |
< |
strcpy(objname, defobj); |
196 |
< |
lineno = 0; |
190 |
> |
|
191 |
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nstats = nunknown = 0; |
192 |
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/* scan until EOF */ |
193 |
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while (argc = getstmt(argv, fp)) { |
196 |
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switch (argv[0][1]) { |
197 |
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case '\0': /* point */ |
198 |
|
if (badarg(argc-1,argv+1,"fff")) |
199 |
< |
syntax(fname, lineno, "Bad vertex"); |
199 |
> |
syntax("Bad vertex"); |
200 |
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newv(atof(argv[1]), atof(argv[2]), |
201 |
|
atof(argv[3])); |
202 |
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break; |
204 |
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if (argv[0][2]) |
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goto unknown; |
206 |
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if (badarg(argc-1,argv+1,"fff")) |
207 |
< |
syntax(fname, lineno, "Bad normal"); |
207 |
> |
syntax("Bad normal"); |
208 |
|
if (!newvn(atof(argv[1]), atof(argv[2]), |
209 |
|
atof(argv[3]))) |
210 |
< |
syntax(fname, lineno, "Zero normal"); |
210 |
> |
syntax("Zero normal"); |
211 |
|
break; |
212 |
|
case 't': /* texture map */ |
213 |
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if (argv[0][2]) |
226 |
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faceno++; |
227 |
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switch (argc-1) { |
228 |
|
case 0: case 1: case 2: |
229 |
< |
syntax(fname, lineno, "Too few vertices"); |
229 |
> |
syntax("Too few vertices"); |
230 |
|
break; |
231 |
|
case 3: |
232 |
|
if (!puttri(argv[1], argv[2], argv[3])) |
233 |
< |
syntax(fname, lineno, "Bad triangle"); |
233 |
> |
syntax("Bad triangle"); |
234 |
|
break; |
235 |
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case 4: |
236 |
|
if (!putquad(argv[1], argv[2], |
237 |
|
argv[3], argv[4])) |
238 |
< |
syntax(fname, lineno, "Bad quad"); |
238 |
> |
syntax("Bad quad"); |
239 |
|
break; |
240 |
|
default: |
241 |
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if (!putface(argc-1, argv+1)) |
242 |
< |
syntax(fname, lineno, "Bad face"); |
242 |
> |
syntax("Bad face"); |
243 |
|
break; |
244 |
|
} |
245 |
|
break; |
281 |
|
} |
282 |
|
nstats++; |
283 |
|
} |
284 |
< |
printf("\n# Done processing file: %s\n", fname); |
284 |
> |
printf("\n# Done processing file: %s\n", inpfile); |
285 |
|
printf("# %d lines, %d statements, %d unrecognized\n", |
286 |
|
lineno, nstats, nunknown); |
287 |
|
} |
326 |
|
{ |
327 |
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register RULEHD *rp = ourmapping; |
328 |
|
|
329 |
< |
if (rp == NULL) /* no rule set */ |
330 |
< |
return(matname); |
329 |
> |
if (rp == NULL) { /* no rule set */ |
330 |
> |
if (matname[0]) |
331 |
> |
return(matname); |
332 |
> |
if (group[0][0]) |
333 |
> |
return(group[0]); |
334 |
> |
return(defmat); |
335 |
> |
} |
336 |
|
/* check for match */ |
337 |
|
do { |
338 |
|
if (matchrule(rp)) { |
353 |
|
static char name[64]; |
354 |
|
register char *cp1, *cp2; |
355 |
|
register int i; |
356 |
< |
|
357 |
< |
if (!group[0][0] || strcmp(objname, DEFOBJ)) |
358 |
< |
return(objname); /* good enough for us */ |
359 |
< |
|
356 |
> |
/* check for preset */ |
357 |
> |
if (objname[0]) |
358 |
> |
return(objname); |
359 |
> |
if (!group[0][0]) |
360 |
> |
return(defobj); |
361 |
|
cp1 = name; /* else make name out of groups */ |
362 |
|
for (i = 0; group[i][0]; i++) { |
363 |
|
cp2 = group[i]; |
381 |
|
register int i; |
382 |
|
|
383 |
|
if (rp->qflg & FL(Q_MTL)) { |
384 |
+ |
if (!matname[0]) |
385 |
+ |
return(0); |
386 |
|
tmpid.number = 0; |
387 |
|
tmpid.name = matname; |
388 |
|
if (!matchid(&tmpid, &idm(rp)[Q_MTL])) |
389 |
|
return(0); |
390 |
|
} |
391 |
|
if (rp->qflg & FL(Q_MAP)) { |
392 |
+ |
if (!mapname[0]) |
393 |
+ |
return(0); |
394 |
|
tmpid.number = 0; |
395 |
|
tmpid.name = mapname; |
396 |
|
if (!matchid(&tmpid, &idm(rp)[Q_MAP])) |
407 |
|
return(0); |
408 |
|
} |
409 |
|
if (rp->qflg & FL(Q_OBJ)) { |
410 |
+ |
if (!objname[0]) |
411 |
+ |
return(0); |
412 |
|
tmpid.number = 0; |
413 |
|
tmpid.name = objname; |
414 |
|
if (!matchid(&tmpid, &idm(rp)[Q_OBJ])) |
471 |
|
} |
472 |
|
|
473 |
|
|
474 |
< |
putface(ac, av) /* put out an N-sided polygon */ |
474 |
> |
nonplanar(ac, av) /* are vertices are non-planar? */ |
475 |
|
register int ac; |
476 |
|
register char **av; |
477 |
|
{ |
478 |
|
VNDX vi; |
479 |
+ |
FLOAT *p0, *p1; |
480 |
+ |
FVECT v1, v2, nsum, newn; |
481 |
+ |
double d; |
482 |
+ |
register int i; |
483 |
+ |
|
484 |
+ |
if (!cvtndx(vi, av[0])) |
485 |
+ |
return(0); |
486 |
+ |
if (vi[2] >= 0) |
487 |
+ |
return(1); /* has interpolated normals */ |
488 |
+ |
if (ac < 4) |
489 |
+ |
return(0); /* it's a triangle! */ |
490 |
+ |
/* set up */ |
491 |
+ |
p0 = vlist[vi[0]]; |
492 |
+ |
if (!cvtndx(vi, av[1])) |
493 |
+ |
return(0); /* error gets caught later */ |
494 |
+ |
nsum[0] = nsum[1] = nsum[2] = 0.; |
495 |
+ |
p1 = vlist[vi[0]]; |
496 |
+ |
fvsum(v2, p1, p0, -1.0); |
497 |
+ |
for (i = 2; i < ac; i++) { |
498 |
+ |
VCOPY(v1, v2); |
499 |
+ |
if (!cvtndx(vi, av[i])) |
500 |
+ |
return(0); |
501 |
+ |
p1 = vlist[vi[0]]; |
502 |
+ |
fvsum(v2, p1, p0, -1.0); |
503 |
+ |
fcross(newn, v1, v2); |
504 |
+ |
if (normalize(newn) == 0.0) { |
505 |
+ |
if (i < 3) |
506 |
+ |
return(1); /* can't deal with this */ |
507 |
+ |
fvsum(nsum, nsum, nsum, 1./(i-2)); |
508 |
+ |
continue; |
509 |
+ |
} |
510 |
+ |
d = fdot(newn,nsum); |
511 |
+ |
if (d >= 0) { |
512 |
+ |
if (d < (1.0-FTINY)*(i-2)) |
513 |
+ |
return(1); |
514 |
+ |
fvsum(nsum, nsum, newn, 1.0); |
515 |
+ |
} else { |
516 |
+ |
if (d > -(1.0-FTINY)*(i-2)) |
517 |
+ |
return(1); |
518 |
+ |
fvsum(nsum, nsum, newn, -1.0); |
519 |
+ |
} |
520 |
+ |
} |
521 |
+ |
return(0); |
522 |
+ |
} |
523 |
+ |
|
524 |
+ |
|
525 |
+ |
putface(ac, av) /* put out an N-sided polygon */ |
526 |
+ |
int ac; |
527 |
+ |
register char **av; |
528 |
+ |
{ |
529 |
+ |
VNDX vi; |
530 |
|
char *mod; |
531 |
+ |
register int i; |
532 |
|
|
533 |
+ |
if (nonplanar(ac, av)) { /* break into quads and triangles */ |
534 |
+ |
while (ac > 3) { |
535 |
+ |
if (!putquad(av[0], av[1], av[2], av[3])) |
536 |
+ |
return(0); |
537 |
+ |
/* remove two vertices & rotate */ |
538 |
+ |
av[ac -= 2] = av[0]; |
539 |
+ |
for (i = 0; i <= ac; i++) |
540 |
+ |
av[i] = av[i+2]; |
541 |
+ |
} |
542 |
+ |
if (ac == 3 && !puttri(av[0], av[1], av[2])) |
543 |
+ |
return(0); |
544 |
+ |
return(1); |
545 |
+ |
} |
546 |
|
if ((mod = getmtl()) == NULL) |
547 |
|
return(-1); |
548 |
|
printf("\n%s polygon %s.%d\n", mod, getonm(), faceno); |
549 |
|
printf("0\n0\n%d\n", 3*ac); |
550 |
< |
while (ac--) { |
551 |
< |
if (!cvtndx(vi, *av++)) |
550 |
> |
for (i = 0; i < ac; i++) { |
551 |
> |
if (!cvtndx(vi, av[i])) |
552 |
|
return(0); |
553 |
|
pvect(vlist[vi[0]]); |
554 |
|
} |
666 |
|
} |
667 |
|
|
668 |
|
|
669 |
< |
putquad(p0, p1, p2, p3) /* put out a quadrilateral */ |
670 |
< |
char *p0, *p1, *p2, *p3; |
669 |
> |
putquad(p0, p1, p3, p2) /* put out a quadrilateral */ |
670 |
> |
char *p0, *p1, *p3, *p2; /* names correspond to binary pos. */ |
671 |
|
{ |
672 |
|
VNDX p0i, p1i, p2i, p3i; |
673 |
|
FVECT norm[4]; |
698 |
|
axis = norminterp(norm, p0i, p1i, p2i, p3i); |
699 |
|
|
700 |
|
/* put out quadrilateral? */ |
701 |
< |
if (ok1 & ok2 && fdot(vc1,vc2) >= 1.0-FTINY*FTINY) { |
701 |
> |
if (ok1 & ok2 && fabs(fdot(vc1,vc2)) >= 1.0-FTINY) { |
702 |
|
printf("\n%s ", mod); |
703 |
|
if (axis != -1) { |
704 |
|
printf("texfunc %s\n", TEXNAME); |
910 |
|
} |
911 |
|
|
912 |
|
|
913 |
< |
syntax(fn, ln, er) /* report syntax error and exit */ |
843 |
< |
char *fn; |
844 |
< |
int ln; |
913 |
> |
syntax(er) /* report syntax error and exit */ |
914 |
|
char *er; |
915 |
|
{ |
916 |
|
fprintf(stderr, "%s: Wavefront syntax error near line %d: %s\n", |
917 |
< |
fn, ln, er); |
917 |
> |
inpfile, lineno, er); |
918 |
|
exit(1); |
919 |
|
} |