| 26 |
|
long raynum = 0L; /* next unique ray number */ |
| 27 |
|
long nrays = 0L; /* number of calls to localhit */ |
| 28 |
|
|
| 29 |
< |
static double Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
| 29 |
> |
static FLOAT Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
| 30 |
|
OBJREC Lamb = { |
| 31 |
|
OVOID, MAT_PLASTIC, "Lambertian", |
| 32 |
< |
{0, 5, NULL, Lambfa}, NULL, -1, |
| 32 |
> |
{0, 5, NULL, Lambfa}, NULL, |
| 33 |
|
}; /* a Lambertian surface */ |
| 34 |
|
|
| 35 |
|
#define MAXLOOP 128 /* modifier loop detection */ |
| 64 |
|
r->crtype = ro->crtype | (r->rtype = rt); |
| 65 |
|
VCOPY(r->rorg, ro->rop); |
| 66 |
|
} |
| 67 |
+ |
rayclear(r); |
| 68 |
+ |
return(r->rlvl <= maxdepth && r->rweight >= minweight ? 0 : -1); |
| 69 |
+ |
} |
| 70 |
+ |
|
| 71 |
+ |
|
| 72 |
+ |
rayclear(r) /* clear a ray for (re)evaluation */ |
| 73 |
+ |
register RAY *r; |
| 74 |
+ |
{ |
| 75 |
|
r->rno = raynum++; |
| 76 |
+ |
r->cxs[0] = 0; |
| 77 |
|
r->newcset = r->clipset; |
| 78 |
|
r->ro = NULL; |
| 79 |
|
r->rot = FHUGE; |
| 81 |
|
setcolor(r->pcol, 1.0, 1.0, 1.0); |
| 82 |
|
setcolor(r->rcol, 0.0, 0.0, 0.0); |
| 83 |
|
r->rt = 0.0; |
| 75 |
– |
return(r->rlvl <= maxdepth && r->rweight >= minweight ? 0 : -1); |
| 84 |
|
} |
| 85 |
|
|
| 86 |
|
|
| 152 |
|
m = &Lamb; |
| 153 |
|
} |
| 154 |
|
(*ofun[m->otype].funp)(m, r); /* execute function */ |
| 147 |
– |
m->lastrno = r->rno; |
| 155 |
|
if (ismaterial(m->otype)) { /* materials call raytexture */ |
| 156 |
|
depth--; |
| 157 |
|
return; /* we're done */ |
| 178 |
|
error(USER, errmsg); |
| 179 |
|
} |
| 180 |
|
(*ofun[m->otype].funp)(m, r); |
| 174 |
– |
m->lastrno = r->rno; |
| 181 |
|
} |
| 182 |
|
depth--; /* end here */ |
| 183 |
|
} |
| 453 |
|
register int i; |
| 454 |
|
|
| 455 |
|
objset(oset, cu->cutree); |
| 456 |
+ |
checkset(oset, r->cxs); /* eliminate double-checking */ |
| 457 |
|
for (i = oset[0]; i > 0; i--) { |
| 458 |
|
o = objptr(oset[i]); |
| 452 |
– |
if (o->lastrno == r->rno) /* checked already? */ |
| 453 |
– |
continue; |
| 459 |
|
(*ofun[o->otype].funp)(o, r); |
| 455 |
– |
o->lastrno = r->rno; |
| 460 |
|
} |
| 461 |
|
if (r->ro == NULL) |
| 462 |
|
return(0); /* no scores yet */ |
| 463 |
|
|
| 464 |
|
return(incube(cu, r->rop)); /* hit OK if in current cube */ |
| 465 |
+ |
} |
| 466 |
+ |
|
| 467 |
+ |
|
| 468 |
+ |
static |
| 469 |
+ |
checkset(os, cs) /* modify checked set and set to check */ |
| 470 |
+ |
register OBJECT os[MAXSET+1]; /* os' = os - cs */ |
| 471 |
+ |
register OBJECT cs[MAXCSET+1]; /* cs' = cs + os */ |
| 472 |
+ |
{ |
| 473 |
+ |
OBJECT cset[MAXCSET+MAXSET+1]; |
| 474 |
+ |
register int i, j, k; |
| 475 |
+ |
/* copy os in place, cset <- cs */ |
| 476 |
+ |
cset[0] = 0; |
| 477 |
+ |
k = 0; |
| 478 |
+ |
for (i = j = 1; i <= os[0]; i++) { |
| 479 |
+ |
while (j <= cs[0] && cs[j] < os[i]) |
| 480 |
+ |
cset[++cset[0]] = cs[j++]; |
| 481 |
+ |
if (j > cs[0] || os[i] != cs[j]) { /* object to check */ |
| 482 |
+ |
os[++k] = os[i]; |
| 483 |
+ |
cset[++cset[0]] = os[i]; |
| 484 |
+ |
} |
| 485 |
+ |
} |
| 486 |
+ |
while (j <= cs[0]) /* get the rest of cs */ |
| 487 |
+ |
cset[++cset[0]] = cs[j++]; |
| 488 |
+ |
if (cset[0] > MAXCSET) /* truncate if necessary */ |
| 489 |
+ |
cset[0] = MAXCSET; |
| 490 |
+ |
setcopy(cs, cset); /* copy new "checked" set back */ |
| 491 |
+ |
os[0] = k; /* new "to check" set size */ |
| 492 |
|
} |