| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: mesh.c,v 2.36 2024/12/12 19:55:57 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Mesh support routines |
| 6 |
*/ |
| 7 |
|
| 8 |
#include "rtio.h" |
| 9 |
#include "rtmath.h" |
| 10 |
#include "rterror.h" |
| 11 |
#include "paths.h" |
| 12 |
#include "octree.h" |
| 13 |
#include "object.h" |
| 14 |
#include "otypes.h" |
| 15 |
#include "mesh.h" |
| 16 |
|
| 17 |
/* An encoded mesh vertex */ |
| 18 |
typedef struct { |
| 19 |
int fl; |
| 20 |
uint32 xyz[3]; |
| 21 |
int32 norm; |
| 22 |
uint32 uv[2]; |
| 23 |
} MCVERT; |
| 24 |
|
| 25 |
#define MPATCHBLKSIZ 128 /* patch allocation block size */ |
| 26 |
|
| 27 |
#define IO_LEGAL (IO_BOUNDS|IO_TREE|IO_SCENE) |
| 28 |
|
| 29 |
static MESH *mlist = NULL; /* list of loaded meshes */ |
| 30 |
|
| 31 |
|
| 32 |
static unsigned long |
| 33 |
cvhash(const char *p) /* hash an encoded vertex */ |
| 34 |
{ |
| 35 |
const MCVERT *cvp = (const MCVERT *)p; |
| 36 |
unsigned long hval; |
| 37 |
|
| 38 |
if (!(cvp->fl & MT_V)) |
| 39 |
return(0); |
| 40 |
hval = cvp->xyz[0] ^ cvp->xyz[1] << 11 ^ cvp->xyz[2] << 22; |
| 41 |
if (cvp->fl & MT_N) |
| 42 |
hval ^= cvp->norm; |
| 43 |
if (cvp->fl & MT_UV) |
| 44 |
hval ^= cvp->uv[0] ^ cvp->uv[1] << 16; |
| 45 |
return(hval); |
| 46 |
} |
| 47 |
|
| 48 |
|
| 49 |
static int |
| 50 |
cvcmp(const char *vv1, const char *vv2) /* compare encoded vertices */ |
| 51 |
{ |
| 52 |
const MCVERT *v1 = (const MCVERT *)vv1, *v2 = (const MCVERT *)vv2; |
| 53 |
|
| 54 |
if (v1->fl != v2->fl) |
| 55 |
return(1); |
| 56 |
if (v1->xyz[0] != v2->xyz[0]) |
| 57 |
return(1); |
| 58 |
if (v1->xyz[1] != v2->xyz[1]) |
| 59 |
return(1); |
| 60 |
if (v1->xyz[2] != v2->xyz[2]) |
| 61 |
return(1); |
| 62 |
if (v1->fl & MT_N && v1->norm != v2->norm) |
| 63 |
return(1); |
| 64 |
if (v1->fl & MT_UV) { |
| 65 |
if (v1->uv[0] != v2->uv[0]) |
| 66 |
return(1); |
| 67 |
if (v1->uv[1] != v2->uv[1]) |
| 68 |
return(1); |
| 69 |
} |
| 70 |
return(0); |
| 71 |
} |
| 72 |
|
| 73 |
|
| 74 |
MESH * |
| 75 |
getmesh( /* get mesh data reference */ |
| 76 |
char *mname, |
| 77 |
int flags |
| 78 |
) |
| 79 |
{ |
| 80 |
char *pathname; |
| 81 |
MESH *ms; |
| 82 |
|
| 83 |
flags &= IO_LEGAL; |
| 84 |
for (ms = mlist; ms != NULL; ms = ms->next) |
| 85 |
if (!strcmp(mname, ms->name)) |
| 86 |
break; |
| 87 |
if (ms == NULL) { /* new mesh entry? */ |
| 88 |
ms = (MESH *)calloc(1, sizeof(MESH)); |
| 89 |
if (ms == NULL) |
| 90 |
error(SYSTEM, "out of memory in getmesh"); |
| 91 |
ms->name = savestr(mname); |
| 92 |
ms->mcube.cutree = EMPTY; |
| 93 |
ms->next = mlist; |
| 94 |
mlist = ms; |
| 95 |
} |
| 96 |
ms->nref++; /* bump reference count */ |
| 97 |
if (!(flags &= ~ms->ldflags)) /* nothing to load? */ |
| 98 |
return(ms); |
| 99 |
if ((pathname = getpath(mname, getrlibpath(), R_OK)) == NULL) { |
| 100 |
sprintf(errmsg, "cannot find mesh file \"%s\"", mname); |
| 101 |
error(SYSTEM, errmsg); |
| 102 |
} |
| 103 |
readmesh(ms, pathname, flags); |
| 104 |
return(ms); |
| 105 |
} |
| 106 |
|
| 107 |
|
| 108 |
MESHINST * |
| 109 |
getmeshinst( /* create mesh instance */ |
| 110 |
OBJREC *o, |
| 111 |
int flags |
| 112 |
) |
| 113 |
{ |
| 114 |
MESHINST *ins; |
| 115 |
|
| 116 |
flags &= IO_LEGAL; |
| 117 |
if ((ins = (MESHINST *)o->os) == NULL) { |
| 118 |
if ((ins = (MESHINST *)malloc(sizeof(MESHINST))) == NULL) |
| 119 |
error(SYSTEM, "out of memory in getmeshinst"); |
| 120 |
if (o->oargs.nsargs < 1) |
| 121 |
objerror(o, USER, "bad # of arguments"); |
| 122 |
if (fullxf(&ins->x, o->oargs.nsargs-1, |
| 123 |
o->oargs.sarg+1) != o->oargs.nsargs-1) |
| 124 |
objerror(o, USER, "bad transform"); |
| 125 |
if (ins->x.f.sca < 0.0) { |
| 126 |
ins->x.f.sca = -ins->x.f.sca; |
| 127 |
ins->x.b.sca = -ins->x.b.sca; |
| 128 |
} |
| 129 |
ins->msh = NULL; |
| 130 |
o->os = (char *)ins; |
| 131 |
} |
| 132 |
if (ins->msh == NULL) |
| 133 |
ins->msh = getmesh(o->oargs.sarg[0], flags); |
| 134 |
else if ((flags &= ~ins->msh->ldflags)) |
| 135 |
readmesh(ins->msh, |
| 136 |
getpath(o->oargs.sarg[0], getrlibpath(), R_OK), |
| 137 |
flags); |
| 138 |
return(ins); |
| 139 |
} |
| 140 |
|
| 141 |
|
| 142 |
int |
| 143 |
nextmeshtri( /* get next triangle ID */ |
| 144 |
OBJECT *tip, |
| 145 |
MESH *mp |
| 146 |
) |
| 147 |
{ |
| 148 |
int pn; |
| 149 |
MESHPATCH *pp; |
| 150 |
|
| 151 |
pn = ++(*tip) >> 10; /* next triangle (OVOID init) */ |
| 152 |
while (pn < mp->npatches) { |
| 153 |
pp = &mp->patch[pn]; |
| 154 |
if (!(*tip & 0x200)) { /* local triangle? */ |
| 155 |
if ((*tip & 0x1ff) < pp->ntris) |
| 156 |
return(1); |
| 157 |
*tip &= ~0x1ff; /* move on to single-joiners */ |
| 158 |
*tip |= 0x200; |
| 159 |
} |
| 160 |
if (!(*tip & 0x100)) { /* single joiner? */ |
| 161 |
if ((*tip & 0xff) < pp->nj1tris) |
| 162 |
return(1); |
| 163 |
*tip &= ~0xff; /* move on to double-joiners */ |
| 164 |
*tip |= 0x100; |
| 165 |
} |
| 166 |
if ((*tip & 0xff) < pp->nj2tris) |
| 167 |
return(1); |
| 168 |
*tip = ++pn << 10; /* first in next patch */ |
| 169 |
} |
| 170 |
return(0); /* out of patches */ |
| 171 |
} |
| 172 |
|
| 173 |
int |
| 174 |
getmeshtrivid( /* get triangle vertex ID's */ |
| 175 |
int32 tvid[3], |
| 176 |
OBJECT *mo, |
| 177 |
MESH *mp, |
| 178 |
OBJECT ti |
| 179 |
) |
| 180 |
{ |
| 181 |
int pn = ti >> 10; |
| 182 |
MESHPATCH *pp; |
| 183 |
|
| 184 |
if (pn >= mp->npatches) |
| 185 |
return(0); |
| 186 |
pp = &mp->patch[pn]; |
| 187 |
ti &= 0x3ff; |
| 188 |
if (!(ti & 0x200)) { /* local triangle */ |
| 189 |
struct PTri *tp; |
| 190 |
if (ti >= pp->ntris) |
| 191 |
return(0); |
| 192 |
tp = &pp->tri[ti]; |
| 193 |
tvid[0] = tvid[1] = tvid[2] = pn << 8; |
| 194 |
tvid[0] |= tp->v1; |
| 195 |
tvid[1] |= tp->v2; |
| 196 |
tvid[2] |= tp->v3; |
| 197 |
if (pp->trimat != NULL) |
| 198 |
*mo = pp->trimat[ti]; |
| 199 |
else |
| 200 |
*mo = pp->solemat; |
| 201 |
if (*mo != OVOID) |
| 202 |
*mo += mp->mat0; |
| 203 |
return(1); |
| 204 |
} |
| 205 |
ti &= ~0x200; |
| 206 |
if (!(ti & 0x100)) { /* single link vertex */ |
| 207 |
struct PJoin1 *tp1; |
| 208 |
if (ti >= pp->nj1tris) |
| 209 |
return(0); |
| 210 |
tp1 = &pp->j1tri[ti]; |
| 211 |
tvid[0] = tp1->v1j; |
| 212 |
tvid[1] = tvid[2] = pn << 8; |
| 213 |
tvid[1] |= tp1->v2; |
| 214 |
tvid[2] |= tp1->v3; |
| 215 |
if ((*mo = tp1->mat) != OVOID) |
| 216 |
*mo += mp->mat0; |
| 217 |
return(1); |
| 218 |
} |
| 219 |
ti &= ~0x100; |
| 220 |
{ /* double link vertex */ |
| 221 |
struct PJoin2 *tp2; |
| 222 |
if (ti >= pp->nj2tris) |
| 223 |
return(0); |
| 224 |
tp2 = &pp->j2tri[ti]; |
| 225 |
tvid[0] = tp2->v1j; |
| 226 |
tvid[1] = tp2->v2j; |
| 227 |
tvid[2] = pn << 8 | tp2->v3; |
| 228 |
if ((*mo = tp2->mat) != OVOID) |
| 229 |
*mo += mp->mat0; |
| 230 |
} |
| 231 |
return(1); |
| 232 |
} |
| 233 |
|
| 234 |
|
| 235 |
int |
| 236 |
getmeshvert( /* get triangle vertex from ID */ |
| 237 |
MESHVERT *vp, |
| 238 |
MESH *mp, |
| 239 |
int32 vid, |
| 240 |
int what |
| 241 |
) |
| 242 |
{ |
| 243 |
int pn = vid >> 8; |
| 244 |
MESHPATCH *pp; |
| 245 |
double vres; |
| 246 |
int i; |
| 247 |
|
| 248 |
vp->fl = 0; |
| 249 |
if (pn >= mp->npatches) |
| 250 |
return(0); |
| 251 |
pp = &mp->patch[pn]; |
| 252 |
vid &= 0xff; |
| 253 |
if (vid >= pp->nverts) |
| 254 |
return(0); |
| 255 |
/* get location */ |
| 256 |
if (what & MT_V) { |
| 257 |
vres = (1./4294967296.)*mp->mcube.cusize; |
| 258 |
for (i = 0; i < 3; i++) |
| 259 |
vp->v[i] = mp->mcube.cuorg[i] + |
| 260 |
(pp->xyz[vid][i] + .5)*vres; |
| 261 |
vp->fl |= MT_V; |
| 262 |
} |
| 263 |
/* get normal */ |
| 264 |
if (what & MT_N && pp->norm != NULL && pp->norm[vid]) { |
| 265 |
decodedir(vp->n, pp->norm[vid]); |
| 266 |
vp->fl |= MT_N; |
| 267 |
} |
| 268 |
/* get (u,v) */ |
| 269 |
if (what & MT_UV && pp->uv != NULL && pp->uv[vid][0]) { |
| 270 |
for (i = 0; i < 2; i++) |
| 271 |
vp->uv[i] = mp->uvlim[0][i] + |
| 272 |
(mp->uvlim[1][i] - mp->uvlim[0][i])* |
| 273 |
(pp->uv[vid][i] + .5)*(1./4294967296.); |
| 274 |
vp->fl |= MT_UV; |
| 275 |
} |
| 276 |
return(vp->fl); |
| 277 |
} |
| 278 |
|
| 279 |
|
| 280 |
OBJREC * |
| 281 |
getmeshpseudo( /* get mesh pseudo object for material */ |
| 282 |
MESH *mp, |
| 283 |
OBJECT mo |
| 284 |
) |
| 285 |
{ |
| 286 |
if ((mo < mp->mat0) | (mo >= mp->mat0 + mp->nmats)) |
| 287 |
error(INTERNAL, "modifier out of range in getmeshpseudo"); |
| 288 |
if (mp->pseudo == NULL) { |
| 289 |
int i; |
| 290 |
mp->pseudo = (OBJREC *)calloc(mp->nmats, sizeof(OBJREC)); |
| 291 |
if (mp->pseudo == NULL) |
| 292 |
error(SYSTEM, "out of memory in getmeshpseudo"); |
| 293 |
for (i = mp->nmats; i--; ) { |
| 294 |
mp->pseudo[i].omod = mp->mat0 + i; |
| 295 |
mp->pseudo[i].otype = OBJ_FACE; |
| 296 |
mp->pseudo[i].oname = "M-Tri"; |
| 297 |
} |
| 298 |
} |
| 299 |
return(&mp->pseudo[mo - mp->mat0]); |
| 300 |
} |
| 301 |
|
| 302 |
|
| 303 |
int |
| 304 |
getmeshtri( /* get triangle vertices */ |
| 305 |
MESHVERT tv[3], |
| 306 |
OBJECT *mo, |
| 307 |
MESH *mp, |
| 308 |
OBJECT ti, |
| 309 |
int wha |
| 310 |
) |
| 311 |
{ |
| 312 |
int32 tvid[3]; |
| 313 |
|
| 314 |
if (!getmeshtrivid(tvid, mo, mp, ti)) |
| 315 |
return(0); |
| 316 |
|
| 317 |
getmeshvert(&tv[0], mp, tvid[0], wha); |
| 318 |
getmeshvert(&tv[1], mp, tvid[1], wha); |
| 319 |
getmeshvert(&tv[2], mp, tvid[2], wha); |
| 320 |
|
| 321 |
return(tv[0].fl & tv[1].fl & tv[2].fl); |
| 322 |
} |
| 323 |
|
| 324 |
|
| 325 |
int32 |
| 326 |
addmeshvert( /* find/add a mesh vertex */ |
| 327 |
MESH *mp, |
| 328 |
MESHVERT *vp |
| 329 |
) |
| 330 |
{ |
| 331 |
LUENT *lvp; |
| 332 |
MCVERT cv; |
| 333 |
int i; |
| 334 |
|
| 335 |
if (!(vp->fl & MT_V)) |
| 336 |
return(-1); |
| 337 |
/* encode vertex */ |
| 338 |
for (i = 0; i < 3; i++) { |
| 339 |
if (vp->v[i] < mp->mcube.cuorg[i]) |
| 340 |
return(-1); |
| 341 |
if (vp->v[i] >= mp->mcube.cuorg[i] + mp->mcube.cusize) |
| 342 |
return(-1); |
| 343 |
cv.xyz[i] = (uint32)(4294967296. * |
| 344 |
(vp->v[i] - mp->mcube.cuorg[i]) / |
| 345 |
mp->mcube.cusize); |
| 346 |
} |
| 347 |
if (vp->fl & MT_N) /* assumes normalized! */ |
| 348 |
cv.norm = encodedir(vp->n); |
| 349 |
if (vp->fl & MT_UV) |
| 350 |
for (i = 0; i < 2; i++) { |
| 351 |
if (vp->uv[i] <= mp->uvlim[0][i]) |
| 352 |
return(-1); |
| 353 |
if (vp->uv[i] >= mp->uvlim[1][i]) |
| 354 |
return(-1); |
| 355 |
cv.uv[i] = (uint32)(4294967296. * |
| 356 |
(vp->uv[i] - mp->uvlim[0][i]) / |
| 357 |
(mp->uvlim[1][i] - mp->uvlim[0][i])); |
| 358 |
} |
| 359 |
cv.fl = vp->fl; |
| 360 |
if (mp->lut.tsiz == 0) { |
| 361 |
mp->lut.hashf = cvhash; |
| 362 |
mp->lut.keycmp = cvcmp; |
| 363 |
mp->lut.freek = free; |
| 364 |
if (!lu_init(&mp->lut, 50000)) |
| 365 |
goto nomem; |
| 366 |
} |
| 367 |
/* find entry */ |
| 368 |
lvp = lu_find(&mp->lut, (char *)&cv); |
| 369 |
if (lvp == NULL) |
| 370 |
goto nomem; |
| 371 |
if (lvp->key == NULL) { |
| 372 |
lvp->key = (char *)malloc(sizeof(MCVERT)+sizeof(int32)); |
| 373 |
memcpy(lvp->key, &cv, sizeof(MCVERT)); |
| 374 |
} |
| 375 |
if (lvp->data == NULL) { /* new vertex */ |
| 376 |
MESHPATCH *pp; |
| 377 |
if (mp->npatches <= 0) { |
| 378 |
mp->patch = (MESHPATCH *)calloc(MPATCHBLKSIZ, |
| 379 |
sizeof(MESHPATCH)); |
| 380 |
if (mp->patch == NULL) |
| 381 |
goto nomem; |
| 382 |
mp->npatches = 1; |
| 383 |
} else if (mp->patch[mp->npatches-1].nverts >= 256) { |
| 384 |
if (mp->npatches >= 1L<<22) |
| 385 |
error(INTERNAL, "too many mesh patches"); |
| 386 |
if (mp->npatches % MPATCHBLKSIZ == 0) { |
| 387 |
mp->patch = (MESHPATCH *)realloc(mp->patch, |
| 388 |
(mp->npatches + MPATCHBLKSIZ)* |
| 389 |
sizeof(MESHPATCH)); |
| 390 |
memset((mp->patch + mp->npatches), '\0', |
| 391 |
MPATCHBLKSIZ*sizeof(MESHPATCH)); |
| 392 |
} |
| 393 |
mp->npatches++; |
| 394 |
} |
| 395 |
pp = &mp->patch[mp->npatches-1]; |
| 396 |
if (pp->xyz == NULL) { |
| 397 |
pp->xyz = (uint32 (*)[3])calloc(256, 3*sizeof(int32)); |
| 398 |
if (pp->xyz == NULL) |
| 399 |
goto nomem; |
| 400 |
} |
| 401 |
for (i = 0; i < 3; i++) |
| 402 |
pp->xyz[pp->nverts][i] = cv.xyz[i]; |
| 403 |
if (cv.fl & MT_N) { |
| 404 |
if (pp->norm == NULL) { |
| 405 |
pp->norm = (int32 *)calloc(256, sizeof(int32)); |
| 406 |
if (pp->norm == NULL) |
| 407 |
goto nomem; |
| 408 |
} |
| 409 |
pp->norm[pp->nverts] = cv.norm; |
| 410 |
} |
| 411 |
if (cv.fl & MT_UV) { |
| 412 |
if (pp->uv == NULL) { |
| 413 |
pp->uv = (uint32 (*)[2])calloc(256, |
| 414 |
2*sizeof(uint32)); |
| 415 |
if (pp->uv == NULL) |
| 416 |
goto nomem; |
| 417 |
} |
| 418 |
for (i = 0; i < 2; i++) |
| 419 |
pp->uv[pp->nverts][i] = cv.uv[i]; |
| 420 |
} |
| 421 |
pp->nverts++; |
| 422 |
lvp->data = lvp->key + sizeof(MCVERT); |
| 423 |
*(int32 *)lvp->data = (mp->npatches-1) << 8 | (pp->nverts-1); |
| 424 |
} |
| 425 |
return(*(int32 *)lvp->data); |
| 426 |
nomem: |
| 427 |
error(SYSTEM, "out of memory in addmeshvert"); |
| 428 |
return(-1); |
| 429 |
} |
| 430 |
|
| 431 |
|
| 432 |
OBJECT |
| 433 |
addmeshtri( /* add a new mesh triangle */ |
| 434 |
MESH *mp, |
| 435 |
MESHVERT tv[3], |
| 436 |
OBJECT mo |
| 437 |
) |
| 438 |
{ |
| 439 |
int32 vid[3], t; |
| 440 |
int pn[3], i; |
| 441 |
MESHPATCH *pp; |
| 442 |
|
| 443 |
if (!(tv[0].fl & tv[1].fl & tv[2].fl & MT_V)) |
| 444 |
return(OVOID); |
| 445 |
/* find/allocate patch vertices */ |
| 446 |
for (i = 0; i < 3; i++) { |
| 447 |
if ((vid[i] = addmeshvert(mp, &tv[i])) < 0) |
| 448 |
return(OVOID); |
| 449 |
pn[i] = vid[i] >> 8; |
| 450 |
} |
| 451 |
/* normalize material index */ |
| 452 |
if (mo != OVOID) { |
| 453 |
if ((mo -= mp->mat0) >= mp->nmats) |
| 454 |
mp->nmats = mo+1; |
| 455 |
else if (mo < 0) |
| 456 |
error(INTERNAL, "modifier range error in addmeshtri"); |
| 457 |
} |
| 458 |
/* assign triangle */ |
| 459 |
if ((pn[0] == pn[1]) & (pn[1] == pn[2])) { /* local case */ |
| 460 |
pp = &mp->patch[pn[0]]; |
| 461 |
if (pp->tri == NULL) { |
| 462 |
pp->tri = (struct PTri *)malloc( |
| 463 |
512*sizeof(struct PTri)); |
| 464 |
if (pp->tri == NULL) |
| 465 |
goto nomem; |
| 466 |
} |
| 467 |
if (pp->ntris < 512) { |
| 468 |
pp->tri[pp->ntris].v1 = vid[0] & 0xff; |
| 469 |
pp->tri[pp->ntris].v2 = vid[1] & 0xff; |
| 470 |
pp->tri[pp->ntris].v3 = vid[2] & 0xff; |
| 471 |
if (pp->ntris == 0) |
| 472 |
pp->solemat = mo; |
| 473 |
else if (pp->trimat == NULL && mo != pp->solemat) { |
| 474 |
pp->trimat = (int16 *)malloc( |
| 475 |
512*sizeof(int16)); |
| 476 |
if (pp->trimat == NULL) |
| 477 |
goto nomem; |
| 478 |
for (i = pp->ntris; i--; ) |
| 479 |
pp->trimat[i] = pp->solemat; |
| 480 |
} |
| 481 |
if (pp->trimat != NULL) |
| 482 |
pp->trimat[pp->ntris] = mo; |
| 483 |
return(pn[0] << 10 | pp->ntris++); |
| 484 |
} |
| 485 |
} else if (pn[0] == pn[1]) { |
| 486 |
t = vid[2]; vid[2] = vid[1]; vid[1] = vid[0]; vid[0] = t; |
| 487 |
i = pn[2]; pn[2] = pn[1]; pn[1] = pn[0]; pn[0] = i; |
| 488 |
} else if (pn[0] == pn[2]) { |
| 489 |
t = vid[0]; vid[0] = vid[1]; vid[1] = vid[2]; vid[2] = t; |
| 490 |
i = pn[0]; pn[0] = pn[1]; pn[1] = pn[2]; pn[2] = i; |
| 491 |
} |
| 492 |
if (pn[1] == pn[2]) { /* single link */ |
| 493 |
pp = &mp->patch[pn[1]]; |
| 494 |
if (pp->j1tri == NULL) { |
| 495 |
pp->j1tri = (struct PJoin1 *)malloc( |
| 496 |
256*sizeof(struct PJoin1)); |
| 497 |
if (pp->j1tri == NULL) |
| 498 |
goto nomem; |
| 499 |
} |
| 500 |
if (pp->nj1tris < 256) { |
| 501 |
pp->j1tri[pp->nj1tris].v1j = vid[0]; |
| 502 |
pp->j1tri[pp->nj1tris].v2 = vid[1] & 0xff; |
| 503 |
pp->j1tri[pp->nj1tris].v3 = vid[2] & 0xff; |
| 504 |
pp->j1tri[pp->nj1tris].mat = mo; |
| 505 |
return(pn[1] << 10 | 0x200 | pp->nj1tris++); |
| 506 |
} |
| 507 |
} |
| 508 |
/* double link */ |
| 509 |
pp = &mp->patch[pn[i=0]]; |
| 510 |
if (mp->patch[pn[1]].nj2tris < pp->nj2tris) |
| 511 |
pp = &mp->patch[pn[i=1]]; |
| 512 |
if (mp->patch[pn[2]].nj2tris < pp->nj2tris) |
| 513 |
pp = &mp->patch[pn[i=2]]; |
| 514 |
if (pp->nj2tris >= 256) |
| 515 |
error(INTERNAL, "too many patch triangles in addmeshtri"); |
| 516 |
if (pp->j2tri == NULL) { |
| 517 |
pp->j2tri = (struct PJoin2 *)malloc( |
| 518 |
256*sizeof(struct PJoin2)); |
| 519 |
if (pp->j2tri == NULL) |
| 520 |
goto nomem; |
| 521 |
} |
| 522 |
pp->j2tri[pp->nj2tris].mat = mo; |
| 523 |
switch (i) { |
| 524 |
case 0: |
| 525 |
pp->j2tri[pp->nj2tris].v3 = vid[0] & 0xff; |
| 526 |
pp->j2tri[pp->nj2tris].v1j = vid[1]; |
| 527 |
pp->j2tri[pp->nj2tris].v2j = vid[2]; |
| 528 |
return(pn[0] << 10 | 0x300 | pp->nj2tris++); |
| 529 |
case 1: |
| 530 |
pp->j2tri[pp->nj2tris].v2j = vid[0]; |
| 531 |
pp->j2tri[pp->nj2tris].v3 = vid[1] & 0xff; |
| 532 |
pp->j2tri[pp->nj2tris].v1j = vid[2]; |
| 533 |
return(pn[1] << 10 | 0x300 | pp->nj2tris++); |
| 534 |
case 2: |
| 535 |
pp->j2tri[pp->nj2tris].v1j = vid[0]; |
| 536 |
pp->j2tri[pp->nj2tris].v2j = vid[1]; |
| 537 |
pp->j2tri[pp->nj2tris].v3 = vid[2] & 0xff; |
| 538 |
return(pn[2] << 10 | 0x300 | pp->nj2tris++); |
| 539 |
} |
| 540 |
nomem: |
| 541 |
error(SYSTEM, "out of memory in addmeshtri"); |
| 542 |
return(OVOID); |
| 543 |
} |
| 544 |
|
| 545 |
|
| 546 |
char * |
| 547 |
checkmesh(MESH *mp) /* validate mesh data */ |
| 548 |
{ |
| 549 |
static char embuf[128]; |
| 550 |
int nouvbounds = 1; |
| 551 |
int i, j; |
| 552 |
/* basic checks */ |
| 553 |
if (mp == NULL) |
| 554 |
return("NULL mesh pointer"); |
| 555 |
if (!mp->ldflags) |
| 556 |
return("unassigned mesh"); |
| 557 |
if (mp->name == NULL) |
| 558 |
return("missing mesh name"); |
| 559 |
if (mp->nref <= 0) |
| 560 |
return("unreferenced mesh"); |
| 561 |
/* check boundaries */ |
| 562 |
if (mp->ldflags & IO_BOUNDS) { |
| 563 |
if (mp->mcube.cusize <= FTINY) |
| 564 |
return("illegal octree bounds in mesh"); |
| 565 |
nouvbounds = (mp->uvlim[1][0] - mp->uvlim[0][0] <= FTINY || |
| 566 |
mp->uvlim[1][1] - mp->uvlim[0][1] <= FTINY); |
| 567 |
} |
| 568 |
/* check octree */ |
| 569 |
if (mp->ldflags & IO_TREE) { |
| 570 |
if (isempty(mp->mcube.cutree)) |
| 571 |
error(WARNING, "empty mesh octree"); |
| 572 |
} |
| 573 |
/* check patch data */ |
| 574 |
if (mp->ldflags & IO_SCENE) { |
| 575 |
MESHVERT mv; |
| 576 |
if (!(mp->ldflags & IO_BOUNDS)) |
| 577 |
return("unbounded scene in mesh"); |
| 578 |
if (mp->mat0 < 0 || mp->mat0+mp->nmats > nobjects) |
| 579 |
return("bad mesh modifier range"); |
| 580 |
if (mp->nmats > 0) /* allocate during preload_objs()! */ |
| 581 |
getmeshpseudo(mp, mp->mat0); |
| 582 |
for (i = mp->mat0+mp->nmats; i-- > mp->mat0; ) { |
| 583 |
int otyp = objptr(i)->otype; |
| 584 |
if (!ismodifier(otyp)) { |
| 585 |
sprintf(embuf, |
| 586 |
"non-modifier in mesh (%s \"%s\")", |
| 587 |
ofun[otyp].funame, objptr(i)->oname); |
| 588 |
return(embuf); |
| 589 |
} |
| 590 |
} |
| 591 |
if (mp->npatches <= 0) |
| 592 |
error(WARNING, "no patches in mesh"); |
| 593 |
for (i = 0; i < mp->npatches; i++) { |
| 594 |
MESHPATCH *pp = &mp->patch[i]; |
| 595 |
if (pp->nverts <= 0) |
| 596 |
error(WARNING, "no vertices in patch"); |
| 597 |
else { |
| 598 |
if (pp->xyz == NULL) |
| 599 |
return("missing patch vertex list"); |
| 600 |
if (nouvbounds && pp->uv != NULL) |
| 601 |
return("unreferenced uv coordinates"); |
| 602 |
} |
| 603 |
if (pp->ntris > 0) { |
| 604 |
struct PTri *tp = pp->tri; |
| 605 |
if (tp == NULL) |
| 606 |
return("missing patch triangle list"); |
| 607 |
if (mp->nmats <= 0) |
| 608 |
j = -1; |
| 609 |
else if (pp->trimat == NULL) |
| 610 |
j = ((pp->solemat < 0) | (pp->solemat >= mp->nmats)) - 1; |
| 611 |
else |
| 612 |
for (j = pp->ntris; j--; ) |
| 613 |
if ((pp->trimat[j] < 0) | |
| 614 |
(pp->trimat[j] >= mp->nmats)) |
| 615 |
break; |
| 616 |
if (j >= 0) |
| 617 |
return("bad local triangle material"); |
| 618 |
for (j = pp->ntris; j--; tp++) |
| 619 |
if ((tp->v1 >= pp->nverts) | (tp->v2 >= pp->nverts) | |
| 620 |
(tp->v3 >= pp->nverts)) |
| 621 |
return("bad local triangle index"); |
| 622 |
} |
| 623 |
if (pp->nj1tris > 0) { |
| 624 |
struct PJoin1 *j1p = pp->j1tri; |
| 625 |
if (j1p == NULL) |
| 626 |
return("missing patch joiner triangle list"); |
| 627 |
for (j = pp->nj1tris; j--; j1p++) { |
| 628 |
if (mp->nmats > 0 && |
| 629 |
(j1p->mat < 0) | (j1p->mat >= mp->nmats)) |
| 630 |
return("bad j1 triangle material"); |
| 631 |
if (!getmeshvert(&mv, mp, j1p->v1j, MT_V)) |
| 632 |
return("bad j1 triangle joiner"); |
| 633 |
if ((j1p->v2 >= pp->nverts) | (j1p->v3 >= pp->nverts)) |
| 634 |
return("bad j1 triangle local index"); |
| 635 |
} |
| 636 |
} |
| 637 |
if (pp->nj2tris > 0) { |
| 638 |
struct PJoin2 *j2p = pp->j2tri; |
| 639 |
if (j2p == NULL) |
| 640 |
return("missing patch double-joiner list"); |
| 641 |
for (j = pp->nj2tris; j--; j2p++) { |
| 642 |
if (mp->nmats > 0 && |
| 643 |
(j2p->mat < 0) | (j2p->mat >= mp->nmats)) |
| 644 |
return("bad j2 triangle material"); |
| 645 |
if (!getmeshvert(&mv, mp, j2p->v1j, MT_V) | |
| 646 |
!getmeshvert(&mv, mp, j2p->v2j, MT_V)) |
| 647 |
return("bad j2 triangle joiner"); |
| 648 |
if (j2p->v3 >= pp->nverts) |
| 649 |
return("bad j2 triangle local index"); |
| 650 |
} |
| 651 |
} |
| 652 |
} |
| 653 |
} |
| 654 |
return(NULL); /* seems to be self-consistent */ |
| 655 |
} |
| 656 |
|
| 657 |
|
| 658 |
static void |
| 659 |
tallyoctree( /* tally octree size */ |
| 660 |
OCTREE ot, |
| 661 |
int *ecp, |
| 662 |
int *lcp, |
| 663 |
int *ocp |
| 664 |
) |
| 665 |
{ |
| 666 |
int i; |
| 667 |
|
| 668 |
if (isempty(ot)) { |
| 669 |
(*ecp)++; |
| 670 |
return; |
| 671 |
} |
| 672 |
if (isfull(ot)) { |
| 673 |
OBJECT oset[MAXSET+1]; |
| 674 |
(*lcp)++; |
| 675 |
objset(oset, ot); |
| 676 |
*ocp += oset[0]; |
| 677 |
return; |
| 678 |
} |
| 679 |
for (i = 0; i < 8; i++) |
| 680 |
tallyoctree(octkid(ot, i), ecp, lcp, ocp); |
| 681 |
} |
| 682 |
|
| 683 |
|
| 684 |
void |
| 685 |
printmeshstats( /* print out mesh statistics */ |
| 686 |
MESH *ms, |
| 687 |
FILE *fp |
| 688 |
) |
| 689 |
{ |
| 690 |
int lfcnt=0, lecnt=0, locnt=0; |
| 691 |
int vcnt=0, ncnt=0, uvcnt=0; |
| 692 |
int nscnt=0, uvscnt=0; |
| 693 |
int tcnt=0, t1cnt=0, t2cnt=0; |
| 694 |
int i, j; |
| 695 |
|
| 696 |
tallyoctree(ms->mcube.cutree, &lecnt, &lfcnt, &locnt); |
| 697 |
for (i = 0; i < ms->npatches; i++) { |
| 698 |
MESHPATCH *pp = &ms->patch[i]; |
| 699 |
vcnt += pp->nverts; |
| 700 |
if (pp->norm != NULL) { |
| 701 |
for (j = pp->nverts; j--; ) |
| 702 |
if (pp->norm[j]) |
| 703 |
ncnt++; |
| 704 |
nscnt += pp->nverts; |
| 705 |
} |
| 706 |
if (pp->uv != NULL) { |
| 707 |
for (j = pp->nverts; j--; ) |
| 708 |
if (pp->uv[j][0]) |
| 709 |
uvcnt++; |
| 710 |
uvscnt += pp->nverts; |
| 711 |
} |
| 712 |
tcnt += pp->ntris; |
| 713 |
t1cnt += pp->nj1tris; |
| 714 |
t2cnt += pp->nj2tris; |
| 715 |
} |
| 716 |
fprintf(fp, "Mesh statistics:\n"); |
| 717 |
fprintf(fp, "\t%ld materials\n", (long)ms->nmats); |
| 718 |
fprintf(fp, "\t%d patches (%.2f MBytes)\n", ms->npatches, |
| 719 |
(ms->npatches*sizeof(MESHPATCH) + |
| 720 |
vcnt*3*sizeof(uint32) + |
| 721 |
nscnt*sizeof(int32) + |
| 722 |
uvscnt*2*sizeof(uint32) + |
| 723 |
tcnt*sizeof(struct PTri) + |
| 724 |
t1cnt*sizeof(struct PJoin1) + |
| 725 |
t2cnt*sizeof(struct PJoin2))/(1024.*1024.)); |
| 726 |
fprintf(fp, "\t%d vertices (%.1f%% w/ normals, %.1f%% w/ uv)\n", |
| 727 |
vcnt, 100.*ncnt/vcnt, 100.*uvcnt/vcnt); |
| 728 |
fprintf(fp, "\t%d triangles (%.1f%% local, %.1f%% joiner)\n", |
| 729 |
tcnt+t1cnt+t2cnt, |
| 730 |
100.*tcnt/(tcnt+t1cnt+t2cnt), |
| 731 |
100.*t1cnt/(tcnt+t1cnt+t2cnt)); |
| 732 |
fprintf(fp, |
| 733 |
"\t%d leaves in octree (%.1f%% empty, %.2f avg. set size)\n", |
| 734 |
lfcnt+lecnt, 100.*lecnt/(lfcnt+lecnt), |
| 735 |
(double)locnt/lfcnt); |
| 736 |
} |
| 737 |
|
| 738 |
|
| 739 |
void |
| 740 |
freemesh(MESH *ms) /* free mesh data */ |
| 741 |
{ |
| 742 |
MESH mhead; |
| 743 |
MESH *msp; |
| 744 |
|
| 745 |
if (ms == NULL) |
| 746 |
return; |
| 747 |
if (ms->nref <= 0) |
| 748 |
error(CONSISTENCY, "unreferenced mesh in freemesh"); |
| 749 |
ms->nref--; |
| 750 |
if (ms->nref) /* still in use */ |
| 751 |
return; |
| 752 |
/* else remove from list */ |
| 753 |
mhead.next = mlist; |
| 754 |
for (msp = &mhead; msp->next != NULL; msp = msp->next) |
| 755 |
if (msp->next == ms) { |
| 756 |
msp->next = ms->next; |
| 757 |
ms->next = NULL; |
| 758 |
break; |
| 759 |
} |
| 760 |
if (ms->next != NULL) /* can't be in list anymore */ |
| 761 |
error(CONSISTENCY, "unlisted mesh in freemesh"); |
| 762 |
mlist = mhead.next; |
| 763 |
/* free mesh data */ |
| 764 |
freestr(ms->name); |
| 765 |
octfree(ms->mcube.cutree); |
| 766 |
lu_done(&ms->lut); |
| 767 |
if (ms->npatches > 0) { |
| 768 |
MESHPATCH *pp = ms->patch + ms->npatches; |
| 769 |
while (pp-- > ms->patch) { |
| 770 |
if (pp->j2tri != NULL) |
| 771 |
free(pp->j2tri); |
| 772 |
if (pp->j1tri != NULL) |
| 773 |
free(pp->j1tri); |
| 774 |
if (pp->tri != NULL) |
| 775 |
free(pp->tri); |
| 776 |
if (pp->uv != NULL) |
| 777 |
free(pp->uv); |
| 778 |
if (pp->norm != NULL) |
| 779 |
free(pp->norm); |
| 780 |
if (pp->xyz != NULL) |
| 781 |
free(pp->xyz); |
| 782 |
if (pp->trimat != NULL) |
| 783 |
free(pp->trimat); |
| 784 |
} |
| 785 |
free(ms->patch); |
| 786 |
} |
| 787 |
if (ms->pseudo != NULL) |
| 788 |
free(ms->pseudo); |
| 789 |
free(ms); |
| 790 |
} |
| 791 |
|
| 792 |
|
| 793 |
void |
| 794 |
freemeshinst(OBJREC *o) /* free mesh instance */ |
| 795 |
{ |
| 796 |
if (o->os == NULL) |
| 797 |
return; |
| 798 |
freemesh((*(MESHINST *)o->os).msh); |
| 799 |
free(o->os); |
| 800 |
o->os = NULL; |
| 801 |
} |
