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. |
12 |
< |
* Also, texture indices only work for triangles, though |
13 |
< |
* I'm not sure they work correctly. |
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. (Taken out -- see TEXMAPS defines.) |
14 |
|
*/ |
15 |
|
|
16 |
|
#include "standard.h" |
17 |
|
|
18 |
+ |
#include "trans.h" |
19 |
+ |
|
20 |
|
#include <ctype.h> |
21 |
|
|
20 |
– |
#define VOIDID "void" /* this is defined in object.h */ |
21 |
– |
|
22 |
|
#define TCALNAME "tmesh.cal" /* triangle interp. file */ |
23 |
– |
#define QCALNAME "surf.cal" /* quad interp. file */ |
23 |
|
#define PATNAME "M-pat" /* mesh pattern name (reused) */ |
24 |
|
#define TEXNAME "M-nor" /* mesh texture name (reused) */ |
25 |
+ |
#define DEFOBJ "unnamed" /* default object name */ |
26 |
+ |
#define DEFMAT "white" /* default material name */ |
27 |
|
|
28 |
|
#define ABS(x) ((x)>=0 ? (x) : -(x)) |
29 |
|
|
33 |
|
int nvs; /* number of vertices in our list */ |
34 |
|
FVECT *vnlist; /* vertex normal list */ |
35 |
|
int nvns; |
36 |
< |
FLOAT (*vtlist)[2]; /* texture vertex list */ |
36 |
> |
FLOAT (*vtlist)[2]; /* map vertex list */ |
37 |
|
int nvts; |
38 |
|
|
39 |
< |
typedef FLOAT BARYCCM[3][4]; /* barycentric coordinate system */ |
39 |
> |
typedef struct { |
40 |
> |
int ax; /* major axis */ |
41 |
> |
FLOAT tm[2][3]; /* transformation */ |
42 |
> |
} BARYCCM; |
43 |
|
|
44 |
< |
typedef int VNDX[3]; /* vertex index (point,texture,normal) */ |
44 |
> |
typedef int VNDX[3]; /* vertex index (point,map,normal) */ |
45 |
|
|
46 |
< |
#define CHUNKSIZ 128 /* vertex allocation chunk size */ |
46 |
> |
#define CHUNKSIZ 256 /* vertex allocation chunk size */ |
47 |
|
|
48 |
|
#define MAXARG 64 /* maximum # arguments in a statement */ |
49 |
|
|
50 |
< |
char *defmat = VOIDID; /* default (starting) material name */ |
51 |
< |
char *defpat = ""; /* default (starting) picture name */ |
52 |
< |
char *defobj = "F"; /* default (starting) object name */ |
50 |
> |
/* qualifiers */ |
51 |
> |
#define Q_MTL 0 |
52 |
> |
#define Q_MAP 1 |
53 |
> |
#define Q_GRP 2 |
54 |
> |
#define Q_OBJ 3 |
55 |
> |
#define Q_FAC 4 |
56 |
> |
#define NQUALS 5 |
57 |
|
|
58 |
< |
char picfile[128]; /* current picture file */ |
58 |
> |
char *qname[NQUALS] = { |
59 |
> |
"Material", |
60 |
> |
"Map", |
61 |
> |
"Group", |
62 |
> |
"Object", |
63 |
> |
"Face", |
64 |
> |
}; |
65 |
> |
|
66 |
> |
QLIST qlist = {NQUALS, qname}; |
67 |
> |
/* valid qualifier ids */ |
68 |
> |
IDLIST qual[NQUALS]; |
69 |
> |
/* mapping rules */ |
70 |
> |
RULEHD *ourmapping = NULL; |
71 |
> |
|
72 |
> |
char *defmat = DEFMAT; /* default (starting) material name */ |
73 |
> |
char *defobj = DEFOBJ; /* default (starting) object name */ |
74 |
> |
|
75 |
> |
int flatten = 0; /* discard surface normal information */ |
76 |
> |
|
77 |
> |
char *getmtl(), *getonm(); |
78 |
> |
|
79 |
> |
char mapname[128]; /* current picture file */ |
80 |
|
char matname[64]; /* current material name */ |
81 |
+ |
char group[16][32]; /* current group names */ |
82 |
|
char objname[128]; /* current object name */ |
83 |
+ |
char *inpfile; /* input file name */ |
84 |
|
int lineno; /* current line number */ |
85 |
+ |
int faceno; /* current face number */ |
86 |
|
|
55 |
– |
int nfaces; /* total number of faces output */ |
87 |
|
|
88 |
< |
|
58 |
< |
main(argc, argv) /* read in T-mesh files and convert */ |
88 |
> |
main(argc, argv) /* read in .obj file and convert */ |
89 |
|
int argc; |
90 |
|
char *argv[]; |
91 |
|
{ |
92 |
< |
FILE *fp; |
92 |
> |
int donames = 0; |
93 |
|
int i; |
94 |
|
|
95 |
|
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
97 |
|
case 'o': /* object name */ |
98 |
|
defobj = argv[++i]; |
99 |
|
break; |
100 |
< |
case 'm': /* default material */ |
101 |
< |
defmat = argv[++i]; |
100 |
> |
case 'n': /* just produce name list */ |
101 |
> |
donames++; |
102 |
|
break; |
103 |
< |
case 'p': /* default picture */ |
104 |
< |
defpat = argv[++i]; |
103 |
> |
case 'm': /* use custom mapfile */ |
104 |
> |
ourmapping = getmapping(argv[++i], &qlist); |
105 |
|
break; |
106 |
+ |
case 'f': /* flatten surfaces */ |
107 |
+ |
flatten++; |
108 |
+ |
break; |
109 |
|
default: |
110 |
< |
fprintf(stderr, |
78 |
< |
"Usage: %s [-o obj][-m mat][-p pic] [file ..]\n", |
79 |
< |
argv[0]); |
80 |
< |
exit(1); |
110 |
> |
goto userr; |
111 |
|
} |
112 |
< |
if (i >= argc) |
113 |
< |
convert("<stdin>", stdin); |
114 |
< |
else |
115 |
< |
for ( ; i < argc; i++) { |
116 |
< |
if ((fp = fopen(argv[i], "r")) == NULL) { |
117 |
< |
perror(argv[i]); |
118 |
< |
exit(1); |
112 |
> |
if (i > argc | i < argc-1) |
113 |
> |
goto userr; |
114 |
> |
if (i == argc) |
115 |
> |
inpfile = "<stdin>"; |
116 |
> |
else if (freopen(inpfile=argv[i], "r", stdin) == NULL) { |
117 |
> |
fprintf(stderr, "%s: cannot open\n", inpfile); |
118 |
> |
exit(1); |
119 |
> |
} |
120 |
> |
if (donames) { /* scan for ids */ |
121 |
> |
getnames(stdin); |
122 |
> |
printf("filename \"%s\"\n", inpfile); |
123 |
> |
printf("filetype \"Wavefront\"\n"); |
124 |
> |
write_quals(&qlist, qual, stdout); |
125 |
> |
printf("qualifier %s begin\n", qlist.qual[Q_FAC]); |
126 |
> |
printf("[%d:%d]\n", 1, faceno); |
127 |
> |
printf("end\n"); |
128 |
> |
} else { /* translate file */ |
129 |
> |
printf("# "); |
130 |
> |
printargs(argc, argv, stdout); |
131 |
> |
convert(stdin); |
132 |
> |
} |
133 |
> |
exit(0); |
134 |
> |
userr: |
135 |
> |
fprintf(stderr, "Usage: %s [-o obj][-m mapping][-n][-f] [file.obj]\n", |
136 |
> |
argv[0]); |
137 |
> |
exit(1); |
138 |
> |
} |
139 |
> |
|
140 |
> |
|
141 |
> |
getnames(fp) /* get valid qualifier names */ |
142 |
> |
FILE *fp; |
143 |
> |
{ |
144 |
> |
char *argv[MAXARG]; |
145 |
> |
int argc; |
146 |
> |
ID tmpid; |
147 |
> |
register int i; |
148 |
> |
|
149 |
> |
while (argc = getstmt(argv, fp)) |
150 |
> |
switch (argv[0][0]) { |
151 |
> |
case 'f': /* face */ |
152 |
> |
if (!argv[0][1]) |
153 |
> |
faceno++; |
154 |
> |
break; |
155 |
> |
case 'u': |
156 |
> |
if (!strcmp(argv[0], "usemtl")) { /* material */ |
157 |
> |
if (argc < 2) |
158 |
> |
break; /* not fatal */ |
159 |
> |
tmpid.number = 0; |
160 |
> |
tmpid.name = argv[1]; |
161 |
> |
findid(&qual[Q_MTL], &tmpid, 1); |
162 |
> |
} else if (!strcmp(argv[0], "usemap")) {/* map */ |
163 |
> |
if (argc < 2 || !strcmp(argv[1], "off")) |
164 |
> |
break; /* not fatal */ |
165 |
> |
tmpid.number = 0; |
166 |
> |
tmpid.name = argv[1]; |
167 |
> |
findid(&qual[Q_MAP], &tmpid, 1); |
168 |
|
} |
169 |
< |
convert(argv[i], fp); |
170 |
< |
fclose(fp); |
169 |
> |
break; |
170 |
> |
case 'o': /* object name */ |
171 |
> |
if (argv[0][1] || argc < 2) |
172 |
> |
break; |
173 |
> |
tmpid.number = 0; |
174 |
> |
tmpid.name = argv[1]; |
175 |
> |
findid(&qual[Q_OBJ], &tmpid, 1); |
176 |
> |
break; |
177 |
> |
case 'g': /* group name(s) */ |
178 |
> |
if (argv[0][1]) |
179 |
> |
break; |
180 |
> |
tmpid.number = 0; |
181 |
> |
for (i = 1; i < argc; i++) { |
182 |
> |
tmpid.name = argv[i]; |
183 |
> |
findid(&qual[Q_GRP], &tmpid, 1); |
184 |
> |
} |
185 |
> |
break; |
186 |
|
} |
93 |
– |
exit(0); |
187 |
|
} |
188 |
|
|
189 |
|
|
190 |
< |
convert(fname, fp) /* convert a T-mesh */ |
98 |
< |
char *fname; |
190 |
> |
convert(fp) /* convert a T-mesh */ |
191 |
|
FILE *fp; |
192 |
|
{ |
193 |
|
char *argv[MAXARG]; |
194 |
|
int argc; |
195 |
|
int nstats, nunknown; |
196 |
|
register int i; |
105 |
– |
/* start fresh */ |
106 |
– |
freeverts(); |
107 |
– |
strcpy(picfile, defpat); |
108 |
– |
strcpy(matname, defmat); |
109 |
– |
strcpy(objname, defobj); |
110 |
– |
lineno = 0; |
111 |
– |
nstats = nunknown = 0; |
197 |
|
|
198 |
< |
printf("\n# Wavefront file read from: %s\n", fname); |
198 |
> |
nstats = nunknown = 0; |
199 |
|
/* scan until EOF */ |
200 |
|
while (argc = getstmt(argv, fp)) { |
201 |
|
switch (argv[0][0]) { |
203 |
|
switch (argv[0][1]) { |
204 |
|
case '\0': /* point */ |
205 |
|
if (badarg(argc-1,argv+1,"fff")) |
206 |
< |
syntax(fname, lineno, "Bad vertex"); |
206 |
> |
syntax("Bad vertex"); |
207 |
|
newv(atof(argv[1]), atof(argv[2]), |
208 |
|
atof(argv[3])); |
209 |
|
break; |
211 |
|
if (argv[0][2]) |
212 |
|
goto unknown; |
213 |
|
if (badarg(argc-1,argv+1,"fff")) |
214 |
< |
syntax(fname, lineno, "Bad normal"); |
214 |
> |
syntax("Bad normal"); |
215 |
|
if (!newvn(atof(argv[1]), atof(argv[2]), |
216 |
|
atof(argv[3]))) |
217 |
< |
syntax(fname, lineno, "Zero normal"); |
217 |
> |
syntax("Zero normal"); |
218 |
|
break; |
219 |
< |
case 't': /* texture */ |
219 |
> |
case 't': /* texture map */ |
220 |
|
if (argv[0][2]) |
221 |
|
goto unknown; |
222 |
|
if (badarg(argc-1,argv+1,"ff")) |
230 |
|
case 'f': /* face */ |
231 |
|
if (argv[0][1]) |
232 |
|
goto unknown; |
233 |
+ |
faceno++; |
234 |
|
switch (argc-1) { |
235 |
|
case 0: case 1: case 2: |
236 |
< |
syntax(fname, lineno, "Too few vertices"); |
236 |
> |
syntax("Too few vertices"); |
237 |
|
break; |
238 |
|
case 3: |
239 |
|
if (!puttri(argv[1], argv[2], argv[3])) |
240 |
< |
syntax(fname, lineno, "Bad triangle"); |
240 |
> |
syntax("Bad triangle"); |
241 |
|
break; |
156 |
– |
case 4: |
157 |
– |
if (!putquad(argv[1], argv[2], |
158 |
– |
argv[3], argv[4])) |
159 |
– |
syntax(fname, lineno, "Bad quad"); |
160 |
– |
break; |
242 |
|
default: |
243 |
|
if (!putface(argc-1, argv+1)) |
244 |
< |
syntax(fname, lineno, "Bad face"); |
244 |
> |
syntax("Bad face"); |
245 |
|
break; |
246 |
|
} |
247 |
|
break; |
254 |
|
if (argc < 2) |
255 |
|
break; /* not fatal */ |
256 |
|
if (!strcmp(argv[1], "off")) |
257 |
< |
picfile[0] = '\0'; |
257 |
> |
mapname[0] = '\0'; |
258 |
|
else |
259 |
< |
strcpy(picfile, argv[1]); |
259 |
> |
sprintf(mapname, "%s.pic", argv[1]); |
260 |
|
} else |
261 |
|
goto unknown; |
262 |
|
break; |
270 |
|
case 'g': /* group name(s) */ |
271 |
|
if (argv[0][1]) |
272 |
|
goto unknown; |
192 |
– |
if (argc < 2) |
193 |
– |
break; /* not fatal */ |
194 |
– |
objname[0] = '\0'; |
273 |
|
for (i = 1; i < argc; i++) |
274 |
< |
if (objname[0]) |
275 |
< |
sprintf(objname+strlen(objname), |
198 |
< |
".%s", argv[i]); |
199 |
< |
else |
200 |
< |
strcpy(objname, argv[i]); |
274 |
> |
strcpy(group[i-1], argv[i]); |
275 |
> |
group[i-1][0] = '\0'; |
276 |
|
break; |
277 |
|
case '#': /* comment */ |
278 |
+ |
printargs(argc, argv, stdout); |
279 |
|
break; |
280 |
|
default:; /* something we don't deal with */ |
281 |
|
unknown: |
284 |
|
} |
285 |
|
nstats++; |
286 |
|
} |
287 |
< |
printf("\n# Done processing file: %s\n", fname); |
287 |
> |
printf("\n# Done processing file: %s\n", inpfile); |
288 |
|
printf("# %d lines, %d statements, %d unrecognized\n", |
289 |
|
lineno, nstats, nunknown); |
290 |
|
} |
322 |
|
|
323 |
|
return(i); |
324 |
|
} |
249 |
– |
|
325 |
|
|
326 |
+ |
|
327 |
+ |
char * |
328 |
+ |
getmtl() /* figure material for this face */ |
329 |
+ |
{ |
330 |
+ |
register RULEHD *rp = ourmapping; |
331 |
+ |
|
332 |
+ |
if (rp == NULL) { /* no rule set */ |
333 |
+ |
if (matname[0]) |
334 |
+ |
return(matname); |
335 |
+ |
if (group[0][0]) |
336 |
+ |
return(group[0]); |
337 |
+ |
return(defmat); |
338 |
+ |
} |
339 |
+ |
/* check for match */ |
340 |
+ |
do { |
341 |
+ |
if (matchrule(rp)) { |
342 |
+ |
if (!strcmp(rp->mnam, VOIDID)) |
343 |
+ |
return(NULL); /* match is null */ |
344 |
+ |
return(rp->mnam); |
345 |
+ |
} |
346 |
+ |
rp = rp->next; |
347 |
+ |
} while (rp != NULL); |
348 |
+ |
/* no match found */ |
349 |
+ |
return(NULL); |
350 |
+ |
} |
351 |
+ |
|
352 |
+ |
|
353 |
+ |
char * |
354 |
+ |
getonm() /* invent a good name for object */ |
355 |
+ |
{ |
356 |
+ |
static char name[64]; |
357 |
+ |
register char *cp1, *cp2; |
358 |
+ |
register int i; |
359 |
+ |
/* check for preset */ |
360 |
+ |
if (objname[0]) |
361 |
+ |
return(objname); |
362 |
+ |
if (!group[0][0]) |
363 |
+ |
return(defobj); |
364 |
+ |
cp1 = name; /* else make name out of groups */ |
365 |
+ |
for (i = 0; group[i][0]; i++) { |
366 |
+ |
cp2 = group[i]; |
367 |
+ |
if (cp1 > name) |
368 |
+ |
*cp1++ = '.'; |
369 |
+ |
while (*cp1 = *cp2++) |
370 |
+ |
if (++cp1 >= name+sizeof(name)-2) { |
371 |
+ |
*cp1 = '\0'; |
372 |
+ |
return(name); |
373 |
+ |
} |
374 |
+ |
} |
375 |
+ |
return(name); |
376 |
+ |
} |
377 |
+ |
|
378 |
+ |
|
379 |
+ |
matchrule(rp) /* check for a match on this rule */ |
380 |
+ |
register RULEHD *rp; |
381 |
+ |
{ |
382 |
+ |
ID tmpid; |
383 |
+ |
int gotmatch; |
384 |
+ |
register int i; |
385 |
+ |
|
386 |
+ |
if (rp->qflg & FL(Q_MTL)) { |
387 |
+ |
if (!matname[0]) |
388 |
+ |
return(0); |
389 |
+ |
tmpid.number = 0; |
390 |
+ |
tmpid.name = matname; |
391 |
+ |
if (!matchid(&tmpid, &idm(rp)[Q_MTL])) |
392 |
+ |
return(0); |
393 |
+ |
} |
394 |
+ |
if (rp->qflg & FL(Q_MAP)) { |
395 |
+ |
if (!mapname[0]) |
396 |
+ |
return(0); |
397 |
+ |
tmpid.number = 0; |
398 |
+ |
tmpid.name = mapname; |
399 |
+ |
if (!matchid(&tmpid, &idm(rp)[Q_MAP])) |
400 |
+ |
return(0); |
401 |
+ |
} |
402 |
+ |
if (rp->qflg & FL(Q_GRP)) { |
403 |
+ |
tmpid.number = 0; |
404 |
+ |
gotmatch = 0; |
405 |
+ |
for (i = 0; group[i][0]; i++) { |
406 |
+ |
tmpid.name = group[i]; |
407 |
+ |
gotmatch |= matchid(&tmpid, &idm(rp)[Q_GRP]); |
408 |
+ |
} |
409 |
+ |
if (!gotmatch) |
410 |
+ |
return(0); |
411 |
+ |
} |
412 |
+ |
if (rp->qflg & FL(Q_OBJ)) { |
413 |
+ |
if (!objname[0]) |
414 |
+ |
return(0); |
415 |
+ |
tmpid.number = 0; |
416 |
+ |
tmpid.name = objname; |
417 |
+ |
if (!matchid(&tmpid, &idm(rp)[Q_OBJ])) |
418 |
+ |
return(0); |
419 |
+ |
} |
420 |
+ |
if (rp->qflg & FL(Q_FAC)) { |
421 |
+ |
tmpid.name = NULL; |
422 |
+ |
tmpid.number = faceno; |
423 |
+ |
if (!matchid(&tmpid, &idm(rp)[Q_FAC])) |
424 |
+ |
return(0); |
425 |
+ |
} |
426 |
+ |
return(1); |
427 |
+ |
} |
428 |
+ |
|
429 |
+ |
|
430 |
|
cvtndx(vi, vs) /* convert vertex string to index */ |
431 |
|
register VNDX vi; |
432 |
|
register char *vs; |
437 |
|
if (vi[0]-- > nvs) |
438 |
|
return(0); |
439 |
|
} else if (vi[0] < 0) { |
440 |
< |
vi[0] = nvs + vi[0]; |
440 |
> |
vi[0] += nvs; |
441 |
|
if (vi[0] < 0) |
442 |
|
return(0); |
443 |
|
} else |
444 |
|
return(0); |
445 |
< |
/* get texture */ |
445 |
> |
/* get map */ |
446 |
|
while (*vs) |
447 |
|
if (*vs++ == '/') |
448 |
|
break; |
451 |
|
if (vi[1]-- > nvts) |
452 |
|
return(0); |
453 |
|
} else if (vi[1] < 0) { |
454 |
< |
vi[1] = nvts + vi[1]; |
454 |
> |
vi[1] += nvts; |
455 |
|
if (vi[1] < 0) |
456 |
|
return(0); |
457 |
|
} else |
465 |
|
if (vi[2]-- > nvns) |
466 |
|
return(0); |
467 |
|
} else if (vi[2] < 0) { |
468 |
< |
vi[2] = nvns + vi[2]; |
468 |
> |
vi[2] += nvns; |
469 |
|
if (vi[2] < 0) |
470 |
|
return(0); |
471 |
|
} else |
474 |
|
} |
475 |
|
|
476 |
|
|
477 |
< |
putface(ac, av) /* put out an N-sided polygon */ |
477 |
> |
nonplanar(ac, av) /* are vertices non-planar? */ |
478 |
|
register int ac; |
479 |
|
register char **av; |
480 |
|
{ |
481 |
|
VNDX vi; |
482 |
+ |
FLOAT *p0, *p1; |
483 |
+ |
FVECT v1, v2, nsum, newn; |
484 |
+ |
double d; |
485 |
+ |
register int i; |
486 |
|
|
487 |
< |
printf("\n%s polygon %s.%d\n", matname, objname, ++nfaces); |
487 |
> |
if (!cvtndx(vi, av[0])) |
488 |
> |
return(0); |
489 |
> |
if (!flatten && vi[2] >= 0) |
490 |
> |
return(1); /* has interpolated normals */ |
491 |
> |
if (ac < 4) |
492 |
> |
return(0); /* it's a triangle! */ |
493 |
> |
/* set up */ |
494 |
> |
p0 = vlist[vi[0]]; |
495 |
> |
if (!cvtndx(vi, av[1])) |
496 |
> |
return(0); /* error gets caught later */ |
497 |
> |
nsum[0] = nsum[1] = nsum[2] = 0.; |
498 |
> |
p1 = vlist[vi[0]]; |
499 |
> |
fvsum(v2, p1, p0, -1.0); |
500 |
> |
for (i = 2; i < ac; i++) { |
501 |
> |
VCOPY(v1, v2); |
502 |
> |
if (!cvtndx(vi, av[i])) |
503 |
> |
return(0); |
504 |
> |
p1 = vlist[vi[0]]; |
505 |
> |
fvsum(v2, p1, p0, -1.0); |
506 |
> |
fcross(newn, v1, v2); |
507 |
> |
if (normalize(newn) == 0.0) { |
508 |
> |
if (i < 3) |
509 |
> |
return(1); /* can't deal with this */ |
510 |
> |
fvsum(nsum, nsum, nsum, 1./(i-2)); |
511 |
> |
continue; |
512 |
> |
} |
513 |
> |
d = fdot(newn,nsum); |
514 |
> |
if (d >= 0) { |
515 |
> |
if (d < (1.0-FTINY)*(i-2)) |
516 |
> |
return(1); |
517 |
> |
fvsum(nsum, nsum, newn, 1.0); |
518 |
> |
} else { |
519 |
> |
if (d > -(1.0-FTINY)*(i-2)) |
520 |
> |
return(1); |
521 |
> |
fvsum(nsum, nsum, newn, -1.0); |
522 |
> |
} |
523 |
> |
} |
524 |
> |
return(0); |
525 |
> |
} |
526 |
> |
|
527 |
> |
|
528 |
> |
putface(ac, av) /* put out an N-sided polygon */ |
529 |
> |
int ac; |
530 |
> |
register char **av; |
531 |
> |
{ |
532 |
> |
VNDX vi; |
533 |
> |
char *cp; |
534 |
> |
register int i; |
535 |
> |
|
536 |
> |
if (nonplanar(ac, av)) { /* break into triangles */ |
537 |
> |
while (ac > 2) { |
538 |
> |
if (!puttri(av[0], av[1], av[2])) |
539 |
> |
return(0); |
540 |
> |
ac--; /* remove vertex & rotate */ |
541 |
> |
cp = av[0]; |
542 |
> |
for (i = 0; i < ac-1; i++) |
543 |
> |
av[i] = av[i+2]; |
544 |
> |
av[i] = cp; |
545 |
> |
} |
546 |
> |
return(1); |
547 |
> |
} |
548 |
> |
if ((cp = getmtl()) == NULL) |
549 |
> |
return(-1); |
550 |
> |
printf("\n%s polygon %s.%d\n", cp, getonm(), faceno); |
551 |
|
printf("0\n0\n%d\n", 3*ac); |
552 |
< |
while (ac--) { |
553 |
< |
if (!cvtndx(vi, *av++)) |
552 |
> |
for (i = 0; i < ac; i++) { |
553 |
> |
if (!cvtndx(vi, av[i])) |
554 |
|
return(0); |
555 |
|
pvect(vlist[vi[0]]); |
556 |
|
} |
561 |
|
puttri(v1, v2, v3) /* put out a triangle */ |
562 |
|
char *v1, *v2, *v3; |
563 |
|
{ |
564 |
< |
char *mod = matname; |
564 |
> |
char *mod; |
565 |
|
VNDX v1i, v2i, v3i; |
566 |
|
BARYCCM bvecs; |
567 |
|
int texOK, patOK; |
568 |
|
|
569 |
+ |
if ((mod = getmtl()) == NULL) |
570 |
+ |
return(-1); |
571 |
+ |
|
572 |
|
if (!cvtndx(v1i, v1) || !cvtndx(v2i, v2) || !cvtndx(v3i, v3)) |
573 |
|
return(0); |
574 |
|
/* compute barycentric coordinates */ |
575 |
< |
texOK = (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0); |
576 |
< |
patOK = picfile[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0); |
575 |
> |
texOK = !flatten && (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0); |
576 |
> |
#ifdef TEXMAPS |
577 |
> |
patOK = mapname[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0); |
578 |
> |
#else |
579 |
> |
patOK = 0; |
580 |
> |
#endif |
581 |
|
if (texOK | patOK) |
582 |
< |
if (comp_baryc(bvecs, vlist[v1i[0]], vlist[v2i[0]], |
582 |
> |
if (comp_baryc(&bvecs, vlist[v1i[0]], vlist[v2i[0]], |
583 |
|
vlist[v3i[0]]) < 0) |
584 |
|
return(-1); |
585 |
|
/* put out texture (if any) */ |
587 |
|
printf("\n%s texfunc %s\n", mod, TEXNAME); |
588 |
|
mod = TEXNAME; |
589 |
|
printf("4 dx dy dz %s\n", TCALNAME); |
590 |
< |
printf("0\n21\n"); |
591 |
< |
put_baryc(bvecs); |
590 |
> |
printf("0\n16 "); |
591 |
> |
put_baryc(&bvecs); |
592 |
|
printf("\t%14.12g %14.12g %14.12g\n", |
593 |
|
vnlist[v1i[2]][0], vnlist[v2i[2]][0], |
594 |
|
vnlist[v3i[2]][0]); |
599 |
|
vnlist[v1i[2]][2], vnlist[v2i[2]][2], |
600 |
|
vnlist[v3i[2]][2]); |
601 |
|
} |
602 |
+ |
#ifdef TEXMAPS |
603 |
|
/* put out pattern (if any) */ |
604 |
|
if (patOK) { |
605 |
|
printf("\n%s colorpict %s\n", mod, PATNAME); |
606 |
|
mod = PATNAME; |
607 |
< |
printf("7 noneg noneg noneg %s %s u v\n", picfile, TCALNAME); |
608 |
< |
printf("0\n18\n"); |
609 |
< |
put_baryc(bvecs); |
607 |
> |
printf("7 noneg noneg noneg %s %s u v\n", mapname, TCALNAME); |
608 |
> |
printf("0\n13 "); |
609 |
> |
put_baryc(&bvecs); |
610 |
|
printf("\t%f %f %f\n", vtlist[v1i[1]][0], |
611 |
|
vtlist[v2i[1]][0], vtlist[v3i[1]][0]); |
612 |
|
printf("\t%f %f %f\n", vtlist[v1i[1]][1], |
613 |
|
vtlist[v2i[1]][1], vtlist[v3i[1]][1]); |
614 |
|
} |
615 |
+ |
#endif |
616 |
|
/* put out triangle */ |
617 |
< |
printf("\n%s polygon %s.%d\n", mod, objname, ++nfaces); |
617 |
> |
printf("\n%s polygon %s.%d\n", mod, getonm(), faceno); |
618 |
|
printf("0\n0\n9\n"); |
619 |
|
pvect(vlist[v1i[0]]); |
620 |
|
pvect(vlist[v2i[0]]); |
626 |
|
|
627 |
|
int |
628 |
|
comp_baryc(bcm, v1, v2, v3) /* compute barycentric vectors */ |
629 |
< |
register BARYCCM bcm; |
629 |
> |
register BARYCCM *bcm; |
630 |
|
FLOAT *v1, *v2, *v3; |
631 |
|
{ |
632 |
|
FLOAT *vt; |
633 |
|
FVECT va, vab, vcb; |
634 |
|
double d; |
635 |
+ |
int ax0, ax1; |
636 |
|
register int i, j; |
637 |
< |
|
638 |
< |
for (j = 0; j < 3; j++) { |
639 |
< |
for (i = 0; i < 3; i++) { |
640 |
< |
vab[i] = v1[i] - v2[i]; |
641 |
< |
vcb[i] = v3[i] - v2[i]; |
642 |
< |
} |
643 |
< |
d = DOT(vcb,vcb); |
637 |
> |
/* compute major axis */ |
638 |
> |
for (i = 0; i < 3; i++) { |
639 |
> |
vab[i] = v1[i] - v2[i]; |
640 |
> |
vcb[i] = v3[i] - v2[i]; |
641 |
> |
} |
642 |
> |
fcross(va, vab, vcb); |
643 |
> |
bcm->ax = ABS(va[0]) > ABS(va[1]) ? 0 : 1; |
644 |
> |
bcm->ax = ABS(va[bcm->ax]) > ABS(va[2]) ? bcm->ax : 2; |
645 |
> |
ax0 = (bcm->ax + 1) % 3; |
646 |
> |
ax1 = (bcm->ax + 2) % 3; |
647 |
> |
for (j = 0; j < 2; j++) { |
648 |
> |
vab[0] = v1[ax0] - v2[ax0]; |
649 |
> |
vcb[0] = v3[ax0] - v2[ax0]; |
650 |
> |
vab[1] = v1[ax1] - v2[ax1]; |
651 |
> |
vcb[1] = v3[ax1] - v2[ax1]; |
652 |
> |
d = vcb[0]*vcb[0] + vcb[1]*vcb[1]; |
653 |
|
if (d <= FTINY) |
654 |
|
return(-1); |
655 |
< |
d = DOT(vcb,vab)/d; |
656 |
< |
for (i = 0; i < 3; i++) |
657 |
< |
va[i] = vab[i] - vcb[i]*d; |
658 |
< |
d = DOT(va,va); |
655 |
> |
d = (vcb[0]*vab[0]+vcb[1]*vab[1])/d; |
656 |
> |
va[0] = vab[0] - vcb[0]*d; |
657 |
> |
va[1] = vab[1] - vcb[1]*d; |
658 |
> |
d = va[0]*va[0] + va[1]*va[1]; |
659 |
|
if (d <= FTINY) |
660 |
|
return(-1); |
661 |
< |
for (i = 0; i < 3; i++) { |
662 |
< |
va[i] /= d; |
663 |
< |
bcm[j][i] = va[i]; |
399 |
< |
} |
400 |
< |
bcm[j][3] = -DOT(v2,va); |
661 |
> |
bcm->tm[j][0] = va[0] /= d; |
662 |
> |
bcm->tm[j][1] = va[1] /= d; |
663 |
> |
bcm->tm[j][2] = -(v2[ax0]*va[0]+v2[ax1]*va[1]); |
664 |
|
/* rotate vertices */ |
665 |
|
vt = v1; |
666 |
|
v1 = v2; |
672 |
|
|
673 |
|
|
674 |
|
put_baryc(bcm) /* put barycentric coord. vectors */ |
675 |
< |
register BARYCCM bcm; |
675 |
> |
register BARYCCM *bcm; |
676 |
|
{ |
677 |
< |
register int i; |
678 |
< |
|
679 |
< |
for (i = 0; i < 3; i++) |
680 |
< |
printf("%14.8f %14.8f %14.8f %14.8f\n", |
681 |
< |
bcm[i][0], bcm[i][1], bcm[i][2], bcm[i][3]); |
677 |
> |
printf("\t%d\n", bcm->ax); |
678 |
> |
printf("%14.8f %14.8f %14.8f\n", |
679 |
> |
bcm->tm[0][0], bcm->tm[0][1], bcm->tm[0][2]); |
680 |
> |
printf("%14.8f %14.8f %14.8f\n", |
681 |
> |
bcm->tm[1][0], bcm->tm[1][1], bcm->tm[1][2]); |
682 |
|
} |
683 |
|
|
684 |
|
|
422 |
– |
putquad(p0, p1, p2, p3) /* put out a quadrilateral */ |
423 |
– |
char *p0, *p1, *p2, *p3; |
424 |
– |
{ |
425 |
– |
VNDX p0i, p1i, p2i, p3i; |
426 |
– |
FVECT norm[4]; |
427 |
– |
int axis; |
428 |
– |
FVECT v1, v2, vc1, vc2; |
429 |
– |
int ok1, ok2; |
430 |
– |
/* get actual indices */ |
431 |
– |
if (!cvtndx(p0i,p0) || !cvtndx(p1i,p1) || |
432 |
– |
!cvtndx(p2i,p2) || !cvtndx(p3i,p3)) |
433 |
– |
return(0); |
434 |
– |
/* compute exact normals */ |
435 |
– |
fvsum(v1, vlist[p1i[0]], vlist[p0i[0]], -1.0); |
436 |
– |
fvsum(v2, vlist[p2i[0]], vlist[p0i[0]], -1.0); |
437 |
– |
fcross(vc1, v1, v2); |
438 |
– |
ok1 = normalize(vc1) != 0.0; |
439 |
– |
fvsum(v1, vlist[p2i[0]], vlist[p3i[0]], -1.0); |
440 |
– |
fvsum(v2, vlist[p1i[0]], vlist[p3i[0]], -1.0); |
441 |
– |
fcross(vc2, v1, v2); |
442 |
– |
ok2 = normalize(vc2) != 0.0; |
443 |
– |
if (!(ok1 | ok2)) |
444 |
– |
return(-1); |
445 |
– |
/* compute normal interpolation */ |
446 |
– |
axis = norminterp(norm, p0i, p1i, p2i, p3i); |
447 |
– |
|
448 |
– |
/* put out quadrilateral? */ |
449 |
– |
if (ok1 & ok2 && fdot(vc1,vc2) >= 1.0-FTINY*FTINY) { |
450 |
– |
printf("\n%s ", matname); |
451 |
– |
if (axis != -1) { |
452 |
– |
printf("texfunc %s\n", TEXNAME); |
453 |
– |
printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME); |
454 |
– |
printf("0\n13\t%d\n", axis); |
455 |
– |
pvect(norm[0]); |
456 |
– |
pvect(norm[1]); |
457 |
– |
pvect(norm[2]); |
458 |
– |
fvsum(v1, norm[3], vc1, -0.5); |
459 |
– |
fvsum(v1, v1, vc2, -0.5); |
460 |
– |
pvect(v1); |
461 |
– |
printf("\n%s ", TEXNAME); |
462 |
– |
} |
463 |
– |
printf("polygon %s.%d\n", objname, ++nfaces); |
464 |
– |
printf("0\n0\n12\n"); |
465 |
– |
pvect(vlist[p0i[0]]); |
466 |
– |
pvect(vlist[p1i[0]]); |
467 |
– |
pvect(vlist[p3i[0]]); |
468 |
– |
pvect(vlist[p2i[0]]); |
469 |
– |
return(1); |
470 |
– |
} |
471 |
– |
/* put out triangles? */ |
472 |
– |
if (ok1) { |
473 |
– |
printf("\n%s ", matname); |
474 |
– |
if (axis != -1) { |
475 |
– |
printf("texfunc %s\n", TEXNAME); |
476 |
– |
printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME); |
477 |
– |
printf("0\n13\t%d\n", axis); |
478 |
– |
pvect(norm[0]); |
479 |
– |
pvect(norm[1]); |
480 |
– |
pvect(norm[2]); |
481 |
– |
fvsum(v1, norm[3], vc1, -1.0); |
482 |
– |
pvect(v1); |
483 |
– |
printf("\n%s ", TEXNAME); |
484 |
– |
} |
485 |
– |
printf("polygon %s.%d\n", objname, ++nfaces); |
486 |
– |
printf("0\n0\n9\n"); |
487 |
– |
pvect(vlist[p0i[0]]); |
488 |
– |
pvect(vlist[p1i[0]]); |
489 |
– |
pvect(vlist[p2i[0]]); |
490 |
– |
} |
491 |
– |
if (ok2) { |
492 |
– |
printf("\n%s ", matname); |
493 |
– |
if (axis != -1) { |
494 |
– |
printf("texfunc %s\n", TEXNAME); |
495 |
– |
printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME); |
496 |
– |
printf("0\n13\t%d\n", axis); |
497 |
– |
pvect(norm[0]); |
498 |
– |
pvect(norm[1]); |
499 |
– |
pvect(norm[2]); |
500 |
– |
fvsum(v2, norm[3], vc2, -1.0); |
501 |
– |
pvect(v2); |
502 |
– |
printf("\n%s ", TEXNAME); |
503 |
– |
} |
504 |
– |
printf("polygon %s.%d\n", objname, ++nfaces); |
505 |
– |
printf("0\n0\n9\n"); |
506 |
– |
pvect(vlist[p2i[0]]); |
507 |
– |
pvect(vlist[p1i[0]]); |
508 |
– |
pvect(vlist[p3i[0]]); |
509 |
– |
} |
510 |
– |
return(1); |
511 |
– |
} |
512 |
– |
|
513 |
– |
|
514 |
– |
int |
515 |
– |
norminterp(resmat, p0i, p1i, p2i, p3i) /* compute normal interpolation */ |
516 |
– |
register FVECT resmat[4]; |
517 |
– |
register VNDX p0i, p1i, p2i, p3i; |
518 |
– |
{ |
519 |
– |
#define u ((ax+1)%3) |
520 |
– |
#define v ((ax+2)%3) |
521 |
– |
|
522 |
– |
register int ax; |
523 |
– |
MAT4 eqnmat; |
524 |
– |
FVECT v1; |
525 |
– |
register int i, j; |
526 |
– |
|
527 |
– |
if (!(p0i[2]>=0 && p1i[2]>=0 && p2i[2]>=0 && p3i[2]>=0)) |
528 |
– |
return(-1); |
529 |
– |
/* find dominant axis */ |
530 |
– |
VCOPY(v1, vnlist[p0i[2]]); |
531 |
– |
fvsum(v1, v1, vnlist[p1i[2]], 1.0); |
532 |
– |
fvsum(v1, v1, vnlist[p2i[2]], 1.0); |
533 |
– |
fvsum(v1, v1, vnlist[p3i[2]], 1.0); |
534 |
– |
ax = ABS(v1[0]) > ABS(v1[1]) ? 0 : 1; |
535 |
– |
ax = ABS(v1[ax]) > ABS(v1[2]) ? ax : 2; |
536 |
– |
/* assign equation matrix */ |
537 |
– |
eqnmat[0][0] = vlist[p0i[0]][u]*vlist[p0i[0]][v]; |
538 |
– |
eqnmat[0][1] = vlist[p0i[0]][u]; |
539 |
– |
eqnmat[0][2] = vlist[p0i[0]][v]; |
540 |
– |
eqnmat[0][3] = 1.0; |
541 |
– |
eqnmat[1][0] = vlist[p1i[0]][u]*vlist[p1i[0]][v]; |
542 |
– |
eqnmat[1][1] = vlist[p1i[0]][u]; |
543 |
– |
eqnmat[1][2] = vlist[p1i[0]][v]; |
544 |
– |
eqnmat[1][3] = 1.0; |
545 |
– |
eqnmat[2][0] = vlist[p2i[0]][u]*vlist[p2i[0]][v]; |
546 |
– |
eqnmat[2][1] = vlist[p2i[0]][u]; |
547 |
– |
eqnmat[2][2] = vlist[p2i[0]][v]; |
548 |
– |
eqnmat[2][3] = 1.0; |
549 |
– |
eqnmat[3][0] = vlist[p3i[0]][u]*vlist[p3i[0]][v]; |
550 |
– |
eqnmat[3][1] = vlist[p3i[0]][u]; |
551 |
– |
eqnmat[3][2] = vlist[p3i[0]][v]; |
552 |
– |
eqnmat[3][3] = 1.0; |
553 |
– |
/* invert matrix (solve system) */ |
554 |
– |
if (!invmat4(eqnmat, eqnmat)) |
555 |
– |
return(-1); /* no solution */ |
556 |
– |
/* compute result matrix */ |
557 |
– |
for (j = 0; j < 4; j++) |
558 |
– |
for (i = 0; i < 3; i++) |
559 |
– |
resmat[j][i] = eqnmat[j][0]*vnlist[p0i[2]][i] + |
560 |
– |
eqnmat[j][1]*vnlist[p1i[2]][i] + |
561 |
– |
eqnmat[j][2]*vnlist[p2i[2]][i] + |
562 |
– |
eqnmat[j][3]*vnlist[p3i[2]][i]; |
563 |
– |
return(ax); |
564 |
– |
|
565 |
– |
#undef u |
566 |
– |
#undef v |
567 |
– |
} |
568 |
– |
|
569 |
– |
|
685 |
|
freeverts() /* free all vertices */ |
686 |
|
{ |
687 |
|
if (nvs) { |
750 |
|
|
751 |
|
|
752 |
|
int |
753 |
< |
newvt(x, y) /* create a new texture vertex */ |
753 |
> |
newvt(x, y) /* create a new texture map vertex */ |
754 |
|
double x, y; |
755 |
|
{ |
756 |
|
if (!(nvts%CHUNKSIZ)) { /* allocate next block */ |
766 |
|
exit(1); |
767 |
|
} |
768 |
|
} |
769 |
< |
/* assign new texture vertex */ |
769 |
> |
/* assign new vertex */ |
770 |
|
vtlist[nvts][0] = x; |
771 |
|
vtlist[nvts][1] = y; |
772 |
|
return(++nvts); |
773 |
|
} |
774 |
|
|
775 |
|
|
776 |
< |
syntax(fn, ln, er) /* report syntax error and exit */ |
662 |
< |
char *fn; |
663 |
< |
int ln; |
776 |
> |
syntax(er) /* report syntax error and exit */ |
777 |
|
char *er; |
778 |
|
{ |
779 |
|
fprintf(stderr, "%s: Wavefront syntax error near line %d: %s\n", |
780 |
< |
fn, ln, er); |
780 |
> |
inpfile, lineno, er); |
781 |
|
exit(1); |
782 |
|
} |