9 |
|
#include "copyright.h" |
10 |
|
#include "standard.h" |
11 |
|
#include "cvmesh.h" |
12 |
+ |
#include "triangulate.h" |
13 |
|
#include <ctype.h> |
14 |
|
|
14 |
– |
FVECT *vlist; /* our vertex list */ |
15 |
– |
int nvs; /* number of vertices in our list */ |
16 |
– |
FVECT *vnlist; /* vertex normal list */ |
17 |
– |
int nvns; |
18 |
– |
FLOAT (*vtlist)[2]; /* map vertex list */ |
19 |
– |
int nvts; |
20 |
– |
|
15 |
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typedef int VNDX[3]; /* vertex index (point,map,normal) */ |
16 |
|
|
17 |
|
#define CHUNKSIZ 1024 /* vertex allocation chunk size */ |
18 |
|
|
19 |
< |
#define MAXARG 64 /* maximum # arguments in a statement */ |
19 |
> |
#define MAXARG 512 /* maximum # arguments in a statement */ |
20 |
|
|
21 |
< |
char *inpfile; /* input file name */ |
22 |
< |
int lineno; /* current line number */ |
23 |
< |
int faceno; /* current face number */ |
21 |
> |
static FVECT *vlist; /* our vertex list */ |
22 |
> |
static int nvs; /* number of vertices in our list */ |
23 |
> |
static FVECT *vnlist; /* vertex normal list */ |
24 |
> |
static int nvns; |
25 |
> |
static RREAL (*vtlist)[2]; /* map vertex list */ |
26 |
> |
static int nvts; |
27 |
|
|
28 |
+ |
static char *inpfile; /* input file name */ |
29 |
+ |
static int havemats; /* materials available? */ |
30 |
+ |
static char material[256]; /* current material name */ |
31 |
+ |
static char group[256]; /* current group name */ |
32 |
+ |
static int lineno; /* current line number */ |
33 |
+ |
static int faceno; /* current face number */ |
34 |
|
|
35 |
< |
wfreadobj(objfn) /* read in .OBJ file and convert */ |
36 |
< |
char *objfn; |
35 |
> |
static int getstmt(char *av[MAXARG], FILE *fp); |
36 |
> |
static int cvtndx(VNDX vi, char *vs); |
37 |
> |
static int putface(int ac, char **av); |
38 |
> |
static OBJECT getmod(void); |
39 |
> |
static int puttri(char *v1, char *v2, char *v3); |
40 |
> |
static void freeverts(void); |
41 |
> |
static int newv(double x, double y, double z); |
42 |
> |
static int newvn(double x, double y, double z); |
43 |
> |
static int newvt(double x, double y); |
44 |
> |
static void syntax(char *er); |
45 |
> |
|
46 |
> |
|
47 |
> |
void |
48 |
> |
wfreadobj( /* read in .OBJ file and convert */ |
49 |
> |
char *objfn |
50 |
> |
) |
51 |
|
{ |
52 |
|
FILE *fp; |
53 |
|
char *argv[MAXARG]; |
54 |
|
int argc; |
55 |
|
int nstats, nunknown; |
39 |
– |
int i; |
56 |
|
|
57 |
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if (objfn == NULL) { |
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inpfile = "<stdin>"; |
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sprintf(errmsg, "cannot open \"%s\"", inpfile); |
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error(USER, errmsg); |
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} |
64 |
+ |
havemats = (nobjects > 0); |
65 |
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nstats = nunknown = 0; |
66 |
+ |
material[0] = '\0'; |
67 |
+ |
group[0] = '\0'; |
68 |
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lineno = 0; faceno = 0; |
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/* scan until EOF */ |
70 |
< |
while (argc = getstmt(argv, fp)) { |
70 |
> |
while ( (argc = getstmt(argv, fp)) ) { |
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switch (argv[0][0]) { |
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case 'v': /* vertex */ |
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switch (argv[0][1]) { |
115 |
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break; |
116 |
|
} |
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break; |
118 |
< |
case 'u': |
119 |
< |
if (strcmp(argv[0], "usemtl") && |
120 |
< |
strcmp(argv[0], "usemap")) |
118 |
> |
case 'u': /* usemtl/usemap */ |
119 |
> |
if (!strcmp(argv[0], "usemap")) |
120 |
> |
break; |
121 |
> |
if (strcmp(argv[0], "usemtl")) |
122 |
|
goto unknown; |
123 |
+ |
if (argc > 1) |
124 |
+ |
strcpy(material, argv[1]); |
125 |
+ |
else |
126 |
+ |
material[0] = '\0'; |
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break; |
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case 'o': /* object name */ |
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if (argv[0][1]) |
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goto unknown; |
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break; |
132 |
< |
case 'g': /* group name(s) */ |
132 |
> |
case 'g': /* group name */ |
133 |
|
if (argv[0][1]) |
134 |
|
goto unknown; |
135 |
+ |
if (argc > 1) |
136 |
+ |
strcpy(group, argv[1]); |
137 |
+ |
else |
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+ |
group[0] = '\0'; |
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|
break; |
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|
case '#': /* comment */ |
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break; |
157 |
|
} |
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|
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|
|
160 |
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int |
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< |
getstmt(av, fp) /* read the next statement from fp */ |
162 |
< |
register char *av[MAXARG]; |
163 |
< |
FILE *fp; |
160 |
> |
static int |
161 |
> |
getstmt( /* read the next statement from fp */ |
162 |
> |
char *av[MAXARG], |
163 |
> |
FILE *fp |
164 |
> |
) |
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|
{ |
166 |
< |
static char sbuf[MAXARG*10]; |
167 |
< |
register char *cp; |
168 |
< |
register int i; |
166 |
> |
static char sbuf[MAXARG*16]; |
167 |
> |
char *cp; |
168 |
> |
int i; |
169 |
|
|
170 |
|
do { |
171 |
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if (fgetline(cp=sbuf, sizeof(sbuf), fp) == NULL) |
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lineno++; |
178 |
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*cp++ = '\0'; |
179 |
|
} |
180 |
< |
if (!*cp || i >= MAXARG-1) |
180 |
> |
if (!*cp) |
181 |
|
break; |
182 |
+ |
if (i >= MAXARG-1) { |
183 |
+ |
sprintf(errmsg, |
184 |
+ |
"%s: too many arguments near line %d (limit %d)\n", |
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+ |
inpfile, lineno+1, MAXARG-1); |
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+ |
break; |
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+ |
} |
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av[i++] = cp; |
189 |
|
while (*++cp && !isspace(*cp)) |
190 |
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; |
197 |
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} |
198 |
|
|
199 |
|
|
200 |
< |
cvtndx(vi, vs) /* convert vertex string to index */ |
201 |
< |
register VNDX vi; |
202 |
< |
register char *vs; |
200 |
> |
static int |
201 |
> |
cvtndx( /* convert vertex string to index */ |
202 |
> |
VNDX vi, |
203 |
> |
char *vs |
204 |
> |
) |
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{ |
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/* get point */ |
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vi[0] = atoi(vs); |
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return(1); |
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} |
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|
|
248 |
+ |
/* determine dominant axis for triangle */ |
249 |
+ |
static int |
250 |
+ |
dominant_axis(char *v1, char *v2, char *v3) |
251 |
+ |
{ |
252 |
+ |
VNDX v1i, v2i, v3i; |
253 |
+ |
FVECT e1, e2, vn; |
254 |
+ |
int i, imax; |
255 |
|
|
256 |
< |
putface(ac, av) /* put out an N-sided polygon */ |
257 |
< |
int ac; |
258 |
< |
register char **av; |
256 |
> |
if (!cvtndx(v1i, v1) || !cvtndx(v2i, v2) || !cvtndx(v3i, v3)) |
257 |
> |
return(-1); |
258 |
> |
VSUB(e1, vlist[v2i[0]], vlist[v1i[0]]); |
259 |
> |
VSUB(e2, vlist[v3i[0]], vlist[v2i[0]]); |
260 |
> |
VCROSS(vn, e1, e2); |
261 |
> |
for (i = imax = 2; i--; ) |
262 |
> |
if (vn[i]*vn[i] > vn[imax]*vn[imax]) |
263 |
> |
imax = i; |
264 |
> |
return(vn[imax]*vn[imax] > FTINY*FTINY ? imax : -1); |
265 |
> |
} |
266 |
> |
|
267 |
> |
/* callback for triangle output from polygon */ |
268 |
> |
static int |
269 |
> |
tri_out(const Vert2_list *tp, int a, int b, int c) |
270 |
|
{ |
271 |
< |
char *cp; |
272 |
< |
register int i; |
271 |
> |
return( puttri( ((char **)tp->p)[a], |
272 |
> |
((char **)tp->p)[b], |
273 |
> |
((char **)tp->p)[c] ) ); |
274 |
> |
} |
275 |
|
|
276 |
< |
while (ac > 3) { /* break into triangles */ |
277 |
< |
if (!puttri(av[0], av[1], av[2])) |
276 |
> |
static int |
277 |
> |
putface( /* put out an N-sided polygon */ |
278 |
> |
int ac, |
279 |
> |
char **av |
280 |
> |
) |
281 |
> |
{ |
282 |
> |
Vert2_list *poly = polyAlloc(ac); |
283 |
> |
int i, ax, ay; |
284 |
> |
|
285 |
> |
if (poly == NULL) |
286 |
> |
return(0); |
287 |
> |
poly->p = (void *)av; |
288 |
> |
for (i = ac-3; i >= 0; i--) /* identify dominant axis */ |
289 |
> |
if ((ax = dominant_axis(av[i], av[i+1], av[i+2])) >= 0) |
290 |
> |
break; |
291 |
> |
if (ax < 0) |
292 |
> |
return(1); /* ignore degenerate face */ |
293 |
> |
if (++ax >= 3) ax = 0; |
294 |
> |
ay = ax; |
295 |
> |
if (++ay >= 3) ay = 0; |
296 |
> |
for (i = 0; i < ac; i++) { /* convert to 2-D polygon */ |
297 |
> |
VNDX vi; |
298 |
> |
if (!cvtndx(vi, av[i])) { |
299 |
> |
error(WARNING, "bad vertex reference"); |
300 |
> |
polyFree(poly); |
301 |
|
return(0); |
302 |
< |
ac--; /* remove vertex & rotate */ |
303 |
< |
cp = av[0]; |
304 |
< |
for (i = 0; i < ac-1; i++) |
225 |
< |
av[i] = av[i+2]; |
226 |
< |
av[i] = cp; |
302 |
> |
} |
303 |
> |
poly->v[i].mX = vlist[vi[0]][ax]; |
304 |
> |
poly->v[i].mY = vlist[vi[0]][ay]; |
305 |
|
} |
306 |
< |
return(puttri(av[0], av[1], av[2])); |
306 |
> |
/* break into triangles & output */ |
307 |
> |
if (!polyTriangulate(poly, &tri_out)) { |
308 |
> |
sprintf(errmsg, "self-intersecting face with %d vertices", ac); |
309 |
> |
error(WARNING, errmsg); |
310 |
> |
} |
311 |
> |
polyFree(poly); |
312 |
> |
return(1); |
313 |
|
} |
314 |
|
|
315 |
|
|
316 |
< |
puttri(v1, v2, v3) /* convert a triangle */ |
317 |
< |
char *v1, *v2, *v3; |
316 |
> |
static OBJECT |
317 |
> |
getmod(void) /* get current modifier ID */ |
318 |
|
{ |
319 |
+ |
char *mnam; |
320 |
+ |
OBJECT mod; |
321 |
+ |
|
322 |
+ |
if (!havemats) |
323 |
+ |
return(OVOID); |
324 |
+ |
if (!strcmp(material, VOIDID)) |
325 |
+ |
return(OVOID); |
326 |
+ |
if (material[0]) /* prefer usemtl statements */ |
327 |
+ |
mnam = material; |
328 |
+ |
else if (group[0]) /* else use group name */ |
329 |
+ |
mnam = group; |
330 |
+ |
else |
331 |
+ |
return(OVOID); |
332 |
+ |
mod = modifier(mnam); |
333 |
+ |
if (mod == OVOID) { |
334 |
+ |
sprintf(errmsg, "%s: undefined modifier \"%s\"", |
335 |
+ |
inpfile, mnam); |
336 |
+ |
error(USER, errmsg); |
337 |
+ |
} |
338 |
+ |
return(mod); |
339 |
+ |
} |
340 |
+ |
|
341 |
+ |
|
342 |
+ |
static int |
343 |
+ |
puttri( /* convert a triangle */ |
344 |
+ |
char *v1, |
345 |
+ |
char *v2, |
346 |
+ |
char *v3 |
347 |
+ |
) |
348 |
+ |
{ |
349 |
|
VNDX v1i, v2i, v3i; |
350 |
< |
FLOAT *v1c, *v2c, *v3c; |
351 |
< |
FLOAT *v1n, *v2n, *v3n; |
350 |
> |
RREAL *v1c, *v2c, *v3c; |
351 |
> |
RREAL *v1n, *v2n, *v3n; |
352 |
|
|
353 |
< |
if (!cvtndx(v1i, v1) || !cvtndx(v2i, v2) || !cvtndx(v3i, v3)) |
353 |
> |
if (!cvtndx(v1i, v1) || !cvtndx(v2i, v2) || !cvtndx(v3i, v3)) { |
354 |
> |
error(WARNING, "bad vertex reference"); |
355 |
|
return(0); |
356 |
< |
|
356 |
> |
} |
357 |
|
if (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0) { |
358 |
|
v1c = vtlist[v1i[1]]; |
359 |
|
v2c = vtlist[v2i[1]]; |
368 |
|
} else |
369 |
|
v1n = v2n = v3n = NULL; |
370 |
|
|
371 |
< |
return(cvtri(vlist[v1i[0]], vlist[v2i[0]], vlist[v3i[0]], |
371 |
> |
return(cvtri(getmod(), vlist[v1i[0]], vlist[v2i[0]], vlist[v3i[0]], |
372 |
|
v1n, v2n, v3n, v1c, v2c, v3c) >= 0); |
373 |
|
} |
374 |
|
|
375 |
|
|
376 |
< |
freeverts() /* free all vertices */ |
376 |
> |
static void |
377 |
> |
freeverts(void) /* free all vertices */ |
378 |
|
{ |
379 |
|
if (nvs) { |
380 |
|
free((void *)vlist); |
391 |
|
} |
392 |
|
|
393 |
|
|
394 |
< |
int |
395 |
< |
newv(x, y, z) /* create a new vertex */ |
396 |
< |
double x, y, z; |
394 |
> |
static int |
395 |
> |
newv( /* create a new vertex */ |
396 |
> |
double x, |
397 |
> |
double y, |
398 |
> |
double z |
399 |
> |
) |
400 |
|
{ |
401 |
|
if (!(nvs%CHUNKSIZ)) { /* allocate next block */ |
402 |
|
if (nvs == 0) |
403 |
|
vlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
404 |
|
else |
405 |
< |
vlist = (FVECT *)realloc((char *)vlist, |
405 |
> |
vlist = (FVECT *)realloc((void *)vlist, |
406 |
|
(nvs+CHUNKSIZ)*sizeof(FVECT)); |
407 |
|
if (vlist == NULL) |
408 |
|
error(SYSTEM, "out of memory in newv"); |
415 |
|
} |
416 |
|
|
417 |
|
|
418 |
< |
int |
419 |
< |
newvn(x, y, z) /* create a new vertex normal */ |
420 |
< |
double x, y, z; |
418 |
> |
static int |
419 |
> |
newvn( /* create a new vertex normal */ |
420 |
> |
double x, |
421 |
> |
double y, |
422 |
> |
double z |
423 |
> |
) |
424 |
|
{ |
425 |
|
if (!(nvns%CHUNKSIZ)) { /* allocate next block */ |
426 |
|
if (nvns == 0) |
427 |
|
vnlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
428 |
|
else |
429 |
< |
vnlist = (FVECT *)realloc((char *)vnlist, |
429 |
> |
vnlist = (FVECT *)realloc((void *)vnlist, |
430 |
|
(nvns+CHUNKSIZ)*sizeof(FVECT)); |
431 |
|
if (vnlist == NULL) |
432 |
|
error(SYSTEM, "out of memory in newvn"); |
441 |
|
} |
442 |
|
|
443 |
|
|
444 |
< |
int |
445 |
< |
newvt(x, y) /* create a new texture map vertex */ |
446 |
< |
double x, y; |
444 |
> |
static int |
445 |
> |
newvt( /* create a new texture map vertex */ |
446 |
> |
double x, |
447 |
> |
double y |
448 |
> |
) |
449 |
|
{ |
450 |
|
if (!(nvts%CHUNKSIZ)) { /* allocate next block */ |
451 |
|
if (nvts == 0) |
452 |
< |
vtlist = (FLOAT (*)[2])malloc(CHUNKSIZ*2*sizeof(FLOAT)); |
452 |
> |
vtlist = (RREAL (*)[2])malloc(CHUNKSIZ*2*sizeof(RREAL)); |
453 |
|
else |
454 |
< |
vtlist = (FLOAT (*)[2])realloc((char *)vtlist, |
455 |
< |
(nvts+CHUNKSIZ)*2*sizeof(FLOAT)); |
454 |
> |
vtlist = (RREAL (*)[2])realloc((void *)vtlist, |
455 |
> |
(nvts+CHUNKSIZ)*2*sizeof(RREAL)); |
456 |
|
if (vtlist == NULL) |
457 |
|
error(SYSTEM, "out of memory in newvt"); |
458 |
|
} |
463 |
|
} |
464 |
|
|
465 |
|
|
466 |
< |
syntax(er) /* report syntax error and exit */ |
467 |
< |
char *er; |
466 |
> |
static void |
467 |
> |
syntax( /* report syntax error and exit */ |
468 |
> |
char *er |
469 |
> |
) |
470 |
|
{ |
471 |
< |
sprintf(errmsg, "%s: Wavefront syntax error near line %d: %s\n", |
471 |
> |
sprintf(errmsg, "%s: Wavefront syntax error near line %d: %s", |
472 |
|
inpfile, lineno, er); |
473 |
|
error(USER, errmsg); |
474 |
|
} |