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. |
13 |
> |
* I'm not sure they work correctly. (Taken out -- see TEXMAPS defines.) |
14 |
|
*/ |
15 |
|
|
16 |
|
#include "standard.h" |
17 |
|
|
18 |
|
#include "trans.h" |
19 |
|
|
20 |
+ |
#include "tmesh.h" |
21 |
+ |
|
22 |
|
#include <ctype.h> |
23 |
|
|
22 |
– |
#define TCALNAME "tmesh.cal" /* triangle interp. file */ |
23 |
– |
#define QCALNAME "surf.cal" /* quad interp. file */ |
24 |
|
#define PATNAME "M-pat" /* mesh pattern name (reused) */ |
25 |
|
#define TEXNAME "M-nor" /* mesh texture name (reused) */ |
26 |
|
#define DEFOBJ "unnamed" /* default object name */ |
27 |
|
#define DEFMAT "white" /* default material name */ |
28 |
|
|
29 |
– |
#define ABS(x) ((x)>=0 ? (x) : -(x)) |
30 |
– |
|
29 |
|
#define pvect(v) printf("%18.12g %18.12g %18.12g\n",(v)[0],(v)[1],(v)[2]) |
30 |
|
|
31 |
|
FVECT *vlist; /* our vertex list */ |
35 |
|
FLOAT (*vtlist)[2]; /* map vertex list */ |
36 |
|
int nvts; |
37 |
|
|
40 |
– |
typedef FLOAT BARYCCM[3][4]; /* barycentric coordinate system */ |
41 |
– |
|
38 |
|
typedef int VNDX[3]; /* vertex index (point,map,normal) */ |
39 |
|
|
40 |
|
#define CHUNKSIZ 256 /* vertex allocation chunk size */ |
65 |
|
|
66 |
|
char *defmat = DEFMAT; /* default (starting) material name */ |
67 |
|
char *defobj = DEFOBJ; /* default (starting) object name */ |
72 |
– |
int donames = 0; /* only get qualifier names */ |
68 |
|
|
69 |
+ |
int flatten = 0; /* discard surface normal information */ |
70 |
+ |
|
71 |
|
char *getmtl(), *getonm(); |
72 |
|
|
73 |
|
char mapname[128]; /* current picture file */ |
74 |
|
char matname[64]; /* current material name */ |
75 |
|
char group[16][32]; /* current group names */ |
76 |
|
char objname[128]; /* current object name */ |
77 |
+ |
char *inpfile; /* input file name */ |
78 |
|
int lineno; /* current line number */ |
79 |
< |
int faceno; /* number of faces read */ |
79 |
> |
int faceno; /* current face number */ |
80 |
|
|
81 |
|
|
82 |
|
main(argc, argv) /* read in .obj file and convert */ |
83 |
|
int argc; |
84 |
|
char *argv[]; |
85 |
|
{ |
86 |
< |
char *fname; |
86 |
> |
int donames = 0; |
87 |
|
int i; |
88 |
|
|
89 |
|
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
97 |
|
case 'm': /* use custom mapfile */ |
98 |
|
ourmapping = getmapping(argv[++i], &qlist); |
99 |
|
break; |
100 |
+ |
case 'f': /* flatten surfaces */ |
101 |
+ |
flatten++; |
102 |
+ |
break; |
103 |
|
default: |
104 |
|
goto userr; |
105 |
|
} |
106 |
|
if (i > argc | i < argc-1) |
107 |
|
goto userr; |
108 |
|
if (i == argc) |
109 |
< |
fname = "<stdin>"; |
110 |
< |
else if (freopen(fname=argv[i], "r", stdin) == NULL) { |
111 |
< |
fprintf(stderr, "%s: cannot open\n", fname); |
109 |
> |
inpfile = "<stdin>"; |
110 |
> |
else if (freopen(inpfile=argv[i], "r", stdin) == NULL) { |
111 |
> |
fprintf(stderr, "%s: cannot open\n", inpfile); |
112 |
|
exit(1); |
113 |
|
} |
114 |
|
if (donames) { /* scan for ids */ |
115 |
|
getnames(stdin); |
116 |
< |
printf("filename \"%s\"\n", fname); |
116 |
> |
printf("filename \"%s\"\n", inpfile); |
117 |
|
printf("filetype \"Wavefront\"\n"); |
118 |
|
write_quals(&qlist, qual, stdout); |
119 |
|
printf("qualifier %s begin\n", qlist.qual[Q_FAC]); |
122 |
|
} else { /* translate file */ |
123 |
|
printf("# "); |
124 |
|
printargs(argc, argv, stdout); |
125 |
< |
convert(fname, stdin); |
125 |
> |
convert(stdin); |
126 |
|
} |
127 |
|
exit(0); |
128 |
|
userr: |
129 |
< |
fprintf(stderr, "Usage: %s [-o obj][-m mapping][-n] [file.obj]\n", |
129 |
> |
fprintf(stderr, "Usage: %s [-o obj][-m mapping][-n][-f] [file.obj]\n", |
130 |
|
argv[0]); |
131 |
|
exit(1); |
132 |
|
} |
181 |
|
} |
182 |
|
|
183 |
|
|
184 |
< |
convert(fname, fp) /* convert a T-mesh */ |
184 |
< |
char *fname; |
184 |
> |
convert(fp) /* convert a T-mesh */ |
185 |
|
FILE *fp; |
186 |
|
{ |
187 |
|
char *argv[MAXARG]; |
188 |
|
int argc; |
189 |
|
int nstats, nunknown; |
190 |
|
register int i; |
191 |
< |
/* start fresh */ |
192 |
< |
freeverts(); |
193 |
< |
mapname[0] = '\0'; |
194 |
< |
strcpy(matname, defmat); |
195 |
< |
strcpy(objname, defobj); |
196 |
< |
lineno = 0; |
191 |
> |
|
192 |
|
nstats = nunknown = 0; |
193 |
|
/* scan until EOF */ |
194 |
|
while (argc = getstmt(argv, fp)) { |
197 |
|
switch (argv[0][1]) { |
198 |
|
case '\0': /* point */ |
199 |
|
if (badarg(argc-1,argv+1,"fff")) |
200 |
< |
syntax(fname, lineno, "Bad vertex"); |
200 |
> |
syntax("Bad vertex"); |
201 |
|
newv(atof(argv[1]), atof(argv[2]), |
202 |
|
atof(argv[3])); |
203 |
|
break; |
205 |
|
if (argv[0][2]) |
206 |
|
goto unknown; |
207 |
|
if (badarg(argc-1,argv+1,"fff")) |
208 |
< |
syntax(fname, lineno, "Bad normal"); |
208 |
> |
syntax("Bad normal"); |
209 |
|
if (!newvn(atof(argv[1]), atof(argv[2]), |
210 |
|
atof(argv[3]))) |
211 |
< |
syntax(fname, lineno, "Zero normal"); |
211 |
> |
syntax("Zero normal"); |
212 |
|
break; |
213 |
|
case 't': /* texture map */ |
214 |
|
if (argv[0][2]) |
227 |
|
faceno++; |
228 |
|
switch (argc-1) { |
229 |
|
case 0: case 1: case 2: |
230 |
< |
syntax(fname, lineno, "Too few vertices"); |
230 |
> |
syntax("Too few vertices"); |
231 |
|
break; |
232 |
|
case 3: |
233 |
|
if (!puttri(argv[1], argv[2], argv[3])) |
234 |
< |
syntax(fname, lineno, "Bad triangle"); |
234 |
> |
syntax("Bad triangle"); |
235 |
|
break; |
241 |
– |
case 4: |
242 |
– |
if (!putquad(argv[1], argv[2], |
243 |
– |
argv[3], argv[4])) |
244 |
– |
syntax(fname, lineno, "Bad quad"); |
245 |
– |
break; |
236 |
|
default: |
237 |
|
if (!putface(argc-1, argv+1)) |
238 |
< |
syntax(fname, lineno, "Bad face"); |
238 |
> |
syntax("Bad face"); |
239 |
|
break; |
240 |
|
} |
241 |
|
break; |
250 |
|
if (!strcmp(argv[1], "off")) |
251 |
|
mapname[0] = '\0'; |
252 |
|
else |
253 |
< |
strcpy(mapname, argv[1]); |
253 |
> |
sprintf(mapname, "%s.pic", argv[1]); |
254 |
|
} else |
255 |
|
goto unknown; |
256 |
|
break; |
269 |
|
group[i-1][0] = '\0'; |
270 |
|
break; |
271 |
|
case '#': /* comment */ |
272 |
+ |
printargs(argc, argv, stdout); |
273 |
|
break; |
274 |
|
default:; /* something we don't deal with */ |
275 |
|
unknown: |
278 |
|
} |
279 |
|
nstats++; |
280 |
|
} |
281 |
< |
printf("\n# Done processing file: %s\n", fname); |
281 |
> |
printf("\n# Done processing file: %s\n", inpfile); |
282 |
|
printf("# %d lines, %d statements, %d unrecognized\n", |
283 |
|
lineno, nstats, nunknown); |
284 |
|
} |
323 |
|
{ |
324 |
|
register RULEHD *rp = ourmapping; |
325 |
|
|
326 |
< |
if (rp == NULL) /* no rule set */ |
327 |
< |
return(matname); |
326 |
> |
if (rp == NULL) { /* no rule set */ |
327 |
> |
if (matname[0]) |
328 |
> |
return(matname); |
329 |
> |
if (group[0][0]) |
330 |
> |
return(group[0]); |
331 |
> |
return(defmat); |
332 |
> |
} |
333 |
|
/* check for match */ |
334 |
|
do { |
335 |
|
if (matchrule(rp)) { |
350 |
|
static char name[64]; |
351 |
|
register char *cp1, *cp2; |
352 |
|
register int i; |
353 |
< |
|
354 |
< |
if (!group[0][0] || strcmp(objname, DEFOBJ)) |
355 |
< |
return(objname); /* good enough for us */ |
356 |
< |
|
353 |
> |
/* check for preset */ |
354 |
> |
if (objname[0]) |
355 |
> |
return(objname); |
356 |
> |
if (!group[0][0]) |
357 |
> |
return(defobj); |
358 |
|
cp1 = name; /* else make name out of groups */ |
359 |
|
for (i = 0; group[i][0]; i++) { |
360 |
|
cp2 = group[i]; |
378 |
|
register int i; |
379 |
|
|
380 |
|
if (rp->qflg & FL(Q_MTL)) { |
381 |
+ |
if (!matname[0]) |
382 |
+ |
return(0); |
383 |
|
tmpid.number = 0; |
384 |
|
tmpid.name = matname; |
385 |
|
if (!matchid(&tmpid, &idm(rp)[Q_MTL])) |
386 |
|
return(0); |
387 |
|
} |
388 |
|
if (rp->qflg & FL(Q_MAP)) { |
389 |
+ |
if (!mapname[0]) |
390 |
+ |
return(0); |
391 |
|
tmpid.number = 0; |
392 |
|
tmpid.name = mapname; |
393 |
|
if (!matchid(&tmpid, &idm(rp)[Q_MAP])) |
404 |
|
return(0); |
405 |
|
} |
406 |
|
if (rp->qflg & FL(Q_OBJ)) { |
407 |
+ |
if (!objname[0]) |
408 |
+ |
return(0); |
409 |
|
tmpid.number = 0; |
410 |
|
tmpid.name = objname; |
411 |
|
if (!matchid(&tmpid, &idm(rp)[Q_OBJ])) |
431 |
|
if (vi[0]-- > nvs) |
432 |
|
return(0); |
433 |
|
} else if (vi[0] < 0) { |
434 |
< |
vi[0] = nvs + vi[0]; |
434 |
> |
vi[0] += nvs; |
435 |
|
if (vi[0] < 0) |
436 |
|
return(0); |
437 |
|
} else |
445 |
|
if (vi[1]-- > nvts) |
446 |
|
return(0); |
447 |
|
} else if (vi[1] < 0) { |
448 |
< |
vi[1] = nvts + vi[1]; |
448 |
> |
vi[1] += nvts; |
449 |
|
if (vi[1] < 0) |
450 |
|
return(0); |
451 |
|
} else |
459 |
|
if (vi[2]-- > nvns) |
460 |
|
return(0); |
461 |
|
} else if (vi[2] < 0) { |
462 |
< |
vi[2] = nvns + vi[2]; |
462 |
> |
vi[2] += nvns; |
463 |
|
if (vi[2] < 0) |
464 |
|
return(0); |
465 |
|
} else |
468 |
|
} |
469 |
|
|
470 |
|
|
471 |
< |
putface(ac, av) /* put out an N-sided polygon */ |
471 |
> |
nonplanar(ac, av) /* are vertices non-planar? */ |
472 |
|
register int ac; |
473 |
|
register char **av; |
474 |
|
{ |
475 |
|
VNDX vi; |
476 |
< |
char *mod; |
476 |
> |
FLOAT *p0, *p1; |
477 |
> |
FVECT v1, v2, nsum, newn; |
478 |
> |
double d; |
479 |
> |
register int i; |
480 |
|
|
481 |
< |
if ((mod = getmtl()) == NULL) |
481 |
> |
if (!cvtndx(vi, av[0])) |
482 |
> |
return(0); |
483 |
> |
if (!flatten && vi[2] >= 0) |
484 |
> |
return(1); /* has interpolated normals */ |
485 |
> |
if (ac < 4) |
486 |
> |
return(0); /* it's a triangle! */ |
487 |
> |
/* set up */ |
488 |
> |
p0 = vlist[vi[0]]; |
489 |
> |
if (!cvtndx(vi, av[1])) |
490 |
> |
return(0); /* error gets caught later */ |
491 |
> |
nsum[0] = nsum[1] = nsum[2] = 0.; |
492 |
> |
p1 = vlist[vi[0]]; |
493 |
> |
fvsum(v2, p1, p0, -1.0); |
494 |
> |
for (i = 2; i < ac; i++) { |
495 |
> |
VCOPY(v1, v2); |
496 |
> |
if (!cvtndx(vi, av[i])) |
497 |
> |
return(0); |
498 |
> |
p1 = vlist[vi[0]]; |
499 |
> |
fvsum(v2, p1, p0, -1.0); |
500 |
> |
fcross(newn, v1, v2); |
501 |
> |
if (normalize(newn) == 0.0) { |
502 |
> |
if (i < 3) |
503 |
> |
return(1); /* can't deal with this */ |
504 |
> |
fvsum(nsum, nsum, nsum, 1./(i-2)); |
505 |
> |
continue; |
506 |
> |
} |
507 |
> |
d = fdot(newn,nsum); |
508 |
> |
if (d >= 0) { |
509 |
> |
if (d < (1.0-FTINY)*(i-2)) |
510 |
> |
return(1); |
511 |
> |
fvsum(nsum, nsum, newn, 1.0); |
512 |
> |
} else { |
513 |
> |
if (d > -(1.0-FTINY)*(i-2)) |
514 |
> |
return(1); |
515 |
> |
fvsum(nsum, nsum, newn, -1.0); |
516 |
> |
} |
517 |
> |
} |
518 |
> |
return(0); |
519 |
> |
} |
520 |
> |
|
521 |
> |
|
522 |
> |
putface(ac, av) /* put out an N-sided polygon */ |
523 |
> |
int ac; |
524 |
> |
register char **av; |
525 |
> |
{ |
526 |
> |
VNDX vi; |
527 |
> |
char *cp; |
528 |
> |
register int i; |
529 |
> |
|
530 |
> |
if (nonplanar(ac, av)) { /* break into triangles */ |
531 |
> |
while (ac > 2) { |
532 |
> |
if (!puttri(av[0], av[1], av[2])) |
533 |
> |
return(0); |
534 |
> |
ac--; /* remove vertex & rotate */ |
535 |
> |
cp = av[0]; |
536 |
> |
for (i = 0; i < ac-1; i++) |
537 |
> |
av[i] = av[i+2]; |
538 |
> |
av[i] = cp; |
539 |
> |
} |
540 |
> |
return(1); |
541 |
> |
} |
542 |
> |
if ((cp = getmtl()) == NULL) |
543 |
|
return(-1); |
544 |
< |
printf("\n%s polygon %s.%d\n", mod, getonm(), faceno); |
544 |
> |
printf("\n%s polygon %s.%d\n", cp, getonm(), faceno); |
545 |
|
printf("0\n0\n%d\n", 3*ac); |
546 |
< |
while (ac--) { |
547 |
< |
if (!cvtndx(vi, *av++)) |
546 |
> |
for (i = 0; i < ac; i++) { |
547 |
> |
if (!cvtndx(vi, av[i])) |
548 |
|
return(0); |
549 |
|
pvect(vlist[vi[0]]); |
550 |
|
} |
558 |
|
char *mod; |
559 |
|
VNDX v1i, v2i, v3i; |
560 |
|
BARYCCM bvecs; |
561 |
+ |
FLOAT bcoor[3][3]; |
562 |
|
int texOK, patOK; |
563 |
+ |
register int i; |
564 |
|
|
565 |
|
if ((mod = getmtl()) == NULL) |
566 |
|
return(-1); |
568 |
|
if (!cvtndx(v1i, v1) || !cvtndx(v2i, v2) || !cvtndx(v3i, v3)) |
569 |
|
return(0); |
570 |
|
/* compute barycentric coordinates */ |
571 |
< |
texOK = (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0); |
571 |
> |
texOK = !flatten && (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0); |
572 |
> |
#ifdef TEXMAPS |
573 |
|
patOK = mapname[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0); |
574 |
+ |
#else |
575 |
+ |
patOK = 0; |
576 |
+ |
#endif |
577 |
|
if (texOK | patOK) |
578 |
< |
if (comp_baryc(bvecs, vlist[v1i[0]], vlist[v2i[0]], |
578 |
> |
if (comp_baryc(&bvecs, vlist[v1i[0]], vlist[v2i[0]], |
579 |
|
vlist[v3i[0]]) < 0) |
580 |
|
return(-1); |
581 |
|
/* put out texture (if any) */ |
583 |
|
printf("\n%s texfunc %s\n", mod, TEXNAME); |
584 |
|
mod = TEXNAME; |
585 |
|
printf("4 dx dy dz %s\n", TCALNAME); |
586 |
< |
printf("0\n21\n"); |
587 |
< |
put_baryc(bvecs); |
588 |
< |
printf("\t%14.12g %14.12g %14.12g\n", |
589 |
< |
vnlist[v1i[2]][0], vnlist[v2i[2]][0], |
590 |
< |
vnlist[v3i[2]][0]); |
591 |
< |
printf("\t%14.12g %14.12g %14.12g\n", |
592 |
< |
vnlist[v1i[2]][1], vnlist[v2i[2]][1], |
520 |
< |
vnlist[v3i[2]][1]); |
521 |
< |
printf("\t%14.12g %14.12g %14.12g\n", |
522 |
< |
vnlist[v1i[2]][2], vnlist[v2i[2]][2], |
523 |
< |
vnlist[v3i[2]][2]); |
586 |
> |
printf("0\n"); |
587 |
> |
for (i = 0; i < 3; i++) { |
588 |
> |
bcoor[i][0] = vnlist[v1i[2]][i]; |
589 |
> |
bcoor[i][1] = vnlist[v2i[2]][i]; |
590 |
> |
bcoor[i][2] = vnlist[v3i[2]][i]; |
591 |
> |
} |
592 |
> |
put_baryc(&bvecs, bcoor, 3); |
593 |
|
} |
594 |
+ |
#ifdef TEXMAPS |
595 |
|
/* put out pattern (if any) */ |
596 |
|
if (patOK) { |
597 |
|
printf("\n%s colorpict %s\n", mod, PATNAME); |
598 |
|
mod = PATNAME; |
599 |
|
printf("7 noneg noneg noneg %s %s u v\n", mapname, TCALNAME); |
600 |
< |
printf("0\n18\n"); |
601 |
< |
put_baryc(bvecs); |
602 |
< |
printf("\t%f %f %f\n", vtlist[v1i[1]][0], |
603 |
< |
vtlist[v2i[1]][0], vtlist[v3i[1]][0]); |
604 |
< |
printf("\t%f %f %f\n", vtlist[v1i[1]][1], |
605 |
< |
vtlist[v2i[1]][1], vtlist[v3i[1]][1]); |
600 |
> |
printf("0\n"); |
601 |
> |
for (i = 0; i < 2; i++) { |
602 |
> |
bcoor[i][0] = vtlist[v1i[1]][i]; |
603 |
> |
bcoor[i][1] = vtlist[v2i[1]][i]; |
604 |
> |
bcoor[i][2] = vtlist[v3i[1]][i]; |
605 |
> |
} |
606 |
> |
put_baryc(&bvecs, bcoor, 2); |
607 |
|
} |
608 |
+ |
#endif |
609 |
|
/* put out triangle */ |
610 |
|
printf("\n%s polygon %s.%d\n", mod, getonm(), faceno); |
611 |
|
printf("0\n0\n9\n"); |
617 |
|
} |
618 |
|
|
619 |
|
|
548 |
– |
int |
549 |
– |
comp_baryc(bcm, v1, v2, v3) /* compute barycentric vectors */ |
550 |
– |
register BARYCCM bcm; |
551 |
– |
FLOAT *v1, *v2, *v3; |
552 |
– |
{ |
553 |
– |
FLOAT *vt; |
554 |
– |
FVECT va, vab, vcb; |
555 |
– |
double d; |
556 |
– |
register int i, j; |
557 |
– |
|
558 |
– |
for (j = 0; j < 3; j++) { |
559 |
– |
for (i = 0; i < 3; i++) { |
560 |
– |
vab[i] = v1[i] - v2[i]; |
561 |
– |
vcb[i] = v3[i] - v2[i]; |
562 |
– |
} |
563 |
– |
d = DOT(vcb,vcb); |
564 |
– |
if (d <= FTINY) |
565 |
– |
return(-1); |
566 |
– |
d = DOT(vcb,vab)/d; |
567 |
– |
for (i = 0; i < 3; i++) |
568 |
– |
va[i] = vab[i] - vcb[i]*d; |
569 |
– |
d = DOT(va,va); |
570 |
– |
if (d <= FTINY) |
571 |
– |
return(-1); |
572 |
– |
for (i = 0; i < 3; i++) { |
573 |
– |
va[i] /= d; |
574 |
– |
bcm[j][i] = va[i]; |
575 |
– |
} |
576 |
– |
bcm[j][3] = -DOT(v2,va); |
577 |
– |
/* rotate vertices */ |
578 |
– |
vt = v1; |
579 |
– |
v1 = v2; |
580 |
– |
v2 = v3; |
581 |
– |
v3 = vt; |
582 |
– |
} |
583 |
– |
return(0); |
584 |
– |
} |
585 |
– |
|
586 |
– |
|
587 |
– |
put_baryc(bcm) /* put barycentric coord. vectors */ |
588 |
– |
register BARYCCM bcm; |
589 |
– |
{ |
590 |
– |
register int i; |
591 |
– |
|
592 |
– |
for (i = 0; i < 3; i++) |
593 |
– |
printf("%14.8f %14.8f %14.8f %14.8f\n", |
594 |
– |
bcm[i][0], bcm[i][1], bcm[i][2], bcm[i][3]); |
595 |
– |
} |
596 |
– |
|
597 |
– |
|
598 |
– |
putquad(p0, p1, p2, p3) /* put out a quadrilateral */ |
599 |
– |
char *p0, *p1, *p2, *p3; |
600 |
– |
{ |
601 |
– |
VNDX p0i, p1i, p2i, p3i; |
602 |
– |
FVECT norm[4]; |
603 |
– |
char *mod, *name; |
604 |
– |
int axis; |
605 |
– |
FVECT v1, v2, vc1, vc2; |
606 |
– |
int ok1, ok2; |
607 |
– |
|
608 |
– |
if ((mod = getmtl()) == NULL) |
609 |
– |
return(-1); |
610 |
– |
name = getonm(); |
611 |
– |
/* get actual indices */ |
612 |
– |
if (!cvtndx(p0i,p0) || !cvtndx(p1i,p1) || |
613 |
– |
!cvtndx(p2i,p2) || !cvtndx(p3i,p3)) |
614 |
– |
return(0); |
615 |
– |
/* compute exact normals */ |
616 |
– |
fvsum(v1, vlist[p1i[0]], vlist[p0i[0]], -1.0); |
617 |
– |
fvsum(v2, vlist[p2i[0]], vlist[p0i[0]], -1.0); |
618 |
– |
fcross(vc1, v1, v2); |
619 |
– |
ok1 = normalize(vc1) != 0.0; |
620 |
– |
fvsum(v1, vlist[p2i[0]], vlist[p3i[0]], -1.0); |
621 |
– |
fvsum(v2, vlist[p1i[0]], vlist[p3i[0]], -1.0); |
622 |
– |
fcross(vc2, v1, v2); |
623 |
– |
ok2 = normalize(vc2) != 0.0; |
624 |
– |
if (!(ok1 | ok2)) |
625 |
– |
return(-1); |
626 |
– |
/* compute normal interpolation */ |
627 |
– |
axis = norminterp(norm, p0i, p1i, p2i, p3i); |
628 |
– |
|
629 |
– |
/* put out quadrilateral? */ |
630 |
– |
if (ok1 & ok2 && fdot(vc1,vc2) >= 1.0-FTINY*FTINY) { |
631 |
– |
printf("\n%s ", mod); |
632 |
– |
if (axis != -1) { |
633 |
– |
printf("texfunc %s\n", TEXNAME); |
634 |
– |
printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME); |
635 |
– |
printf("0\n13\t%d\n", axis); |
636 |
– |
pvect(norm[0]); |
637 |
– |
pvect(norm[1]); |
638 |
– |
pvect(norm[2]); |
639 |
– |
fvsum(v1, norm[3], vc1, -0.5); |
640 |
– |
fvsum(v1, v1, vc2, -0.5); |
641 |
– |
pvect(v1); |
642 |
– |
printf("\n%s ", TEXNAME); |
643 |
– |
} |
644 |
– |
printf("polygon %s.%d\n", name, faceno); |
645 |
– |
printf("0\n0\n12\n"); |
646 |
– |
pvect(vlist[p0i[0]]); |
647 |
– |
pvect(vlist[p1i[0]]); |
648 |
– |
pvect(vlist[p3i[0]]); |
649 |
– |
pvect(vlist[p2i[0]]); |
650 |
– |
return(1); |
651 |
– |
} |
652 |
– |
/* put out triangles? */ |
653 |
– |
if (ok1) { |
654 |
– |
printf("\n%s ", mod); |
655 |
– |
if (axis != -1) { |
656 |
– |
printf("texfunc %s\n", TEXNAME); |
657 |
– |
printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME); |
658 |
– |
printf("0\n13\t%d\n", axis); |
659 |
– |
pvect(norm[0]); |
660 |
– |
pvect(norm[1]); |
661 |
– |
pvect(norm[2]); |
662 |
– |
fvsum(v1, norm[3], vc1, -1.0); |
663 |
– |
pvect(v1); |
664 |
– |
printf("\n%s ", TEXNAME); |
665 |
– |
} |
666 |
– |
printf("polygon %s.%da\n", name, faceno); |
667 |
– |
printf("0\n0\n9\n"); |
668 |
– |
pvect(vlist[p0i[0]]); |
669 |
– |
pvect(vlist[p1i[0]]); |
670 |
– |
pvect(vlist[p2i[0]]); |
671 |
– |
} |
672 |
– |
if (ok2) { |
673 |
– |
printf("\n%s ", mod); |
674 |
– |
if (axis != -1) { |
675 |
– |
printf("texfunc %s\n", TEXNAME); |
676 |
– |
printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME); |
677 |
– |
printf("0\n13\t%d\n", axis); |
678 |
– |
pvect(norm[0]); |
679 |
– |
pvect(norm[1]); |
680 |
– |
pvect(norm[2]); |
681 |
– |
fvsum(v2, norm[3], vc2, -1.0); |
682 |
– |
pvect(v2); |
683 |
– |
printf("\n%s ", TEXNAME); |
684 |
– |
} |
685 |
– |
printf("polygon %s.%db\n", name, faceno); |
686 |
– |
printf("0\n0\n9\n"); |
687 |
– |
pvect(vlist[p2i[0]]); |
688 |
– |
pvect(vlist[p1i[0]]); |
689 |
– |
pvect(vlist[p3i[0]]); |
690 |
– |
} |
691 |
– |
return(1); |
692 |
– |
} |
693 |
– |
|
694 |
– |
|
695 |
– |
int |
696 |
– |
norminterp(resmat, p0i, p1i, p2i, p3i) /* compute normal interpolation */ |
697 |
– |
register FVECT resmat[4]; |
698 |
– |
register VNDX p0i, p1i, p2i, p3i; |
699 |
– |
{ |
700 |
– |
#define u ((ax+1)%3) |
701 |
– |
#define v ((ax+2)%3) |
702 |
– |
|
703 |
– |
register int ax; |
704 |
– |
MAT4 eqnmat; |
705 |
– |
FVECT v1; |
706 |
– |
register int i, j; |
707 |
– |
|
708 |
– |
if (!(p0i[2]>=0 && p1i[2]>=0 && p2i[2]>=0 && p3i[2]>=0)) |
709 |
– |
return(-1); |
710 |
– |
/* find dominant axis */ |
711 |
– |
VCOPY(v1, vnlist[p0i[2]]); |
712 |
– |
fvsum(v1, v1, vnlist[p1i[2]], 1.0); |
713 |
– |
fvsum(v1, v1, vnlist[p2i[2]], 1.0); |
714 |
– |
fvsum(v1, v1, vnlist[p3i[2]], 1.0); |
715 |
– |
ax = ABS(v1[0]) > ABS(v1[1]) ? 0 : 1; |
716 |
– |
ax = ABS(v1[ax]) > ABS(v1[2]) ? ax : 2; |
717 |
– |
/* assign equation matrix */ |
718 |
– |
eqnmat[0][0] = vlist[p0i[0]][u]*vlist[p0i[0]][v]; |
719 |
– |
eqnmat[0][1] = vlist[p0i[0]][u]; |
720 |
– |
eqnmat[0][2] = vlist[p0i[0]][v]; |
721 |
– |
eqnmat[0][3] = 1.0; |
722 |
– |
eqnmat[1][0] = vlist[p1i[0]][u]*vlist[p1i[0]][v]; |
723 |
– |
eqnmat[1][1] = vlist[p1i[0]][u]; |
724 |
– |
eqnmat[1][2] = vlist[p1i[0]][v]; |
725 |
– |
eqnmat[1][3] = 1.0; |
726 |
– |
eqnmat[2][0] = vlist[p2i[0]][u]*vlist[p2i[0]][v]; |
727 |
– |
eqnmat[2][1] = vlist[p2i[0]][u]; |
728 |
– |
eqnmat[2][2] = vlist[p2i[0]][v]; |
729 |
– |
eqnmat[2][3] = 1.0; |
730 |
– |
eqnmat[3][0] = vlist[p3i[0]][u]*vlist[p3i[0]][v]; |
731 |
– |
eqnmat[3][1] = vlist[p3i[0]][u]; |
732 |
– |
eqnmat[3][2] = vlist[p3i[0]][v]; |
733 |
– |
eqnmat[3][3] = 1.0; |
734 |
– |
/* invert matrix (solve system) */ |
735 |
– |
if (!invmat4(eqnmat, eqnmat)) |
736 |
– |
return(-1); /* no solution */ |
737 |
– |
/* compute result matrix */ |
738 |
– |
for (j = 0; j < 4; j++) |
739 |
– |
for (i = 0; i < 3; i++) |
740 |
– |
resmat[j][i] = eqnmat[j][0]*vnlist[p0i[2]][i] + |
741 |
– |
eqnmat[j][1]*vnlist[p1i[2]][i] + |
742 |
– |
eqnmat[j][2]*vnlist[p2i[2]][i] + |
743 |
– |
eqnmat[j][3]*vnlist[p3i[2]][i]; |
744 |
– |
return(ax); |
745 |
– |
|
746 |
– |
#undef u |
747 |
– |
#undef v |
748 |
– |
} |
749 |
– |
|
750 |
– |
|
620 |
|
freeverts() /* free all vertices */ |
621 |
|
{ |
622 |
|
if (nvs) { |
708 |
|
} |
709 |
|
|
710 |
|
|
711 |
< |
syntax(fn, ln, er) /* report syntax error and exit */ |
843 |
< |
char *fn; |
844 |
< |
int ln; |
711 |
> |
syntax(er) /* report syntax error and exit */ |
712 |
|
char *er; |
713 |
|
{ |
714 |
|
fprintf(stderr, "%s: Wavefront syntax error near line %d: %s\n", |
715 |
< |
fn, ln, er); |
715 |
> |
inpfile, lineno, er); |
716 |
|
exit(1); |
717 |
|
} |