| 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 |
|
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 |
|
if (objfn == NULL) { |
| 58 |
|
inpfile = "<stdin>"; |
| 61 |
|
sprintf(errmsg, "cannot open \"%s\"", inpfile); |
| 62 |
|
error(USER, errmsg); |
| 63 |
|
} |
| 64 |
+ |
havemats = (nobjects > 0); |
| 65 |
|
nstats = nunknown = 0; |
| 66 |
+ |
material[0] = '\0'; |
| 67 |
+ |
group[0] = '\0'; |
| 68 |
|
lineno = 0; faceno = 0; |
| 69 |
|
/* scan until EOF */ |
| 70 |
< |
while (argc = getstmt(argv, fp)) { |
| 70 |
> |
while ( (argc = getstmt(argv, fp)) ) { |
| 71 |
|
switch (argv[0][0]) { |
| 72 |
|
case 'v': /* vertex */ |
| 73 |
|
switch (argv[0][1]) { |
| 115 |
|
break; |
| 116 |
|
} |
| 117 |
|
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'; |
| 127 |
|
break; |
| 128 |
|
case 'o': /* object name */ |
| 129 |
|
if (argv[0][1]) |
| 130 |
|
goto unknown; |
| 131 |
|
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 |
| 138 |
+ |
group[0] = '\0'; |
| 139 |
|
break; |
| 140 |
|
case '#': /* comment */ |
| 141 |
|
break; |
| 157 |
|
} |
| 158 |
|
|
| 159 |
|
|
| 160 |
< |
int |
| 161 |
< |
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 |
> |
) |
| 165 |
|
{ |
| 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 |
|
if (fgetline(cp=sbuf, sizeof(sbuf), fp) == NULL) |
| 177 |
|
lineno++; |
| 178 |
|
*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", |
| 185 |
+ |
inpfile, lineno+1, MAXARG-1); |
| 186 |
+ |
break; |
| 187 |
+ |
} |
| 188 |
|
av[i++] = cp; |
| 189 |
|
while (*++cp && !isspace(*cp)) |
| 190 |
|
; |
| 197 |
|
} |
| 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 |
> |
) |
| 205 |
|
{ |
| 206 |
|
/* get point */ |
| 207 |
|
vi[0] = atoi(vs); |
| 245 |
|
return(1); |
| 246 |
|
} |
| 247 |
|
|
| 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 |
|
} |