| 34 |
|
{0, 5, NULL, Lambfa}, NULL, |
| 35 |
|
}; /* a Lambertian surface */ |
| 36 |
|
|
| 37 |
+ |
OBJREC Aftplane; /* aft clipping plane object */ |
| 38 |
+ |
|
| 39 |
|
static int raymove(), checkset(), checkhit(); |
| 40 |
|
|
| 41 |
|
#define MAXLOOP 128 /* modifier loop detection */ |
| 69 |
|
r->rweight = ro->rweight * rw; |
| 70 |
|
r->crtype = ro->crtype | (r->rtype = rt); |
| 71 |
|
VCOPY(r->rorg, ro->rop); |
| 72 |
+ |
r->rmax = 0.0; |
| 73 |
|
} |
| 74 |
|
rayclear(r); |
| 75 |
|
return(r->rlvl <= maxdepth && r->rweight >= minweight ? 0 : -1); |
| 98 |
|
|
| 99 |
|
if (localhit(r, &thescene)) |
| 100 |
|
gotmat = raycont(r); |
| 101 |
< |
else if (sourcehit(r)) |
| 101 |
> |
else if (r->ro == &Aftplane) { |
| 102 |
> |
r->ro = NULL; |
| 103 |
> |
r->rot = FHUGE; |
| 104 |
> |
} else if (sourcehit(r)) |
| 105 |
|
gotmat = rayshade(r, r->ro->omod); |
| 106 |
|
|
| 107 |
< |
if (!gotmat) |
| 107 |
> |
if (r->ro != NULL && !gotmat) |
| 108 |
|
objerror(r->ro, USER, "material not found"); |
| 109 |
|
|
| 110 |
|
if (trace != NULL) |
| 131 |
|
|
| 132 |
|
if (rayorigin(&tr, r, TRANS, 1.0) == 0) { |
| 133 |
|
VCOPY(tr.rdir, r->rdir); |
| 134 |
+ |
if (r->rmax > FTINY) |
| 135 |
+ |
tr.rmax = r->rmax - r->rot; |
| 136 |
|
rayvalue(&tr); |
| 137 |
|
copycolor(r->rcol, tr.rcol); |
| 138 |
|
r->rt = r->rot + tr.rt; |
| 164 |
|
if (irr_ignore(m->otype)) { |
| 165 |
|
depth--; |
| 166 |
|
raytrans(r); |
| 167 |
< |
return; |
| 167 |
> |
return(1); |
| 168 |
|
} |
| 169 |
|
if (!islight(m->otype)) |
| 170 |
|
m = &Lamb; |
| 215 |
|
coef = 1.0; |
| 216 |
|
else if (coef < 0.0) |
| 217 |
|
coef = 0.0; |
| 218 |
+ |
/* compute foreground and background */ |
| 219 |
+ |
foremat = backmat = -1; |
| 220 |
|
/* foreground */ |
| 221 |
|
copystruct(&fr, r); |
| 222 |
|
if (fore != OVOID && coef > FTINY) |
| 223 |
|
foremat = rayshade(&fr, fore); |
| 214 |
– |
else |
| 215 |
– |
foremat = 0; |
| 224 |
|
/* background */ |
| 225 |
|
copystruct(&br, r); |
| 226 |
|
if (back != OVOID && coef < 1.0-FTINY) |
| 227 |
|
backmat = rayshade(&br, back); |
| 220 |
– |
else |
| 221 |
– |
backmat = foremat; |
| 228 |
|
/* check */ |
| 229 |
+ |
if (foremat < 0) |
| 230 |
+ |
if (backmat < 0) |
| 231 |
+ |
foremat = backmat = 0; |
| 232 |
+ |
else |
| 233 |
+ |
foremat = backmat; |
| 234 |
+ |
else if (backmat < 0) |
| 235 |
+ |
backmat = foremat; |
| 236 |
|
if ((foremat==0) != (backmat==0)) |
| 237 |
|
objerror(r->ro, USER, "mixing material with non-material"); |
| 238 |
|
/* mix perturbations */ |
| 361 |
|
} |
| 362 |
|
if (sflags == 0) |
| 363 |
|
error(CONSISTENCY, "zero ray direction in localhit"); |
| 364 |
+ |
/* start off assuming nothing hit */ |
| 365 |
+ |
if (r->rmax > FTINY) { /* except aft plane if one */ |
| 366 |
+ |
r->ro = &Aftplane; |
| 367 |
+ |
r->rot = r->rmax; |
| 368 |
+ |
for (i = 0; i < 3; i++) |
| 369 |
+ |
r->rop[i] = r->rorg[i] + r->rot*r->rdir[i]; |
| 370 |
+ |
} |
| 371 |
+ |
/* find global cube entrance point */ |
| 372 |
|
t = 0.0; |
| 373 |
|
if (!incube(scene, curpos)) { |
| 374 |
|
/* find distance to entry */ |
| 386 |
|
t = dt; /* farthest face is the one */ |
| 387 |
|
} |
| 388 |
|
t += FTINY; /* fudge to get inside cube */ |
| 389 |
+ |
if (t >= r->rot) /* clipped already */ |
| 390 |
+ |
return(0); |
| 391 |
|
/* advance position */ |
| 392 |
|
for (i = 0; i < 3; i++) |
| 393 |
|
curpos[i] += r->rdir[i]*t; |
| 396 |
|
return(0); |
| 397 |
|
} |
| 398 |
|
cxset[0] = 0; |
| 399 |
< |
return(raymove(curpos, cxset, sflags, r, scene) == RAYHIT); |
| 399 |
> |
return(raymove(curpos, cxset, sflags, r, scene) == RAYHIT && |
| 400 |
> |
r->ro != &Aftplane); |
| 401 |
|
} |
| 402 |
|
|
| 403 |
|
|
