34 |
|
{0, 5, NULL, Lambfa}, NULL, |
35 |
|
}; /* a Lambertian surface */ |
36 |
|
|
37 |
< |
static OBJREC Aftplane; /* aft clipping plane object */ |
37 |
> |
OBJREC Aftplane; /* aft clipping plane object */ |
38 |
|
|
39 |
|
static int raymove(), checkset(), checkhit(); |
40 |
|
|
81 |
|
{ |
82 |
|
r->rno = raynum++; |
83 |
|
r->newcset = r->clipset; |
84 |
< |
if (r->rmax > FTINY) { |
85 |
< |
r->ro = &Aftplane; |
86 |
< |
r->rot = r->rmax; |
87 |
< |
r->rop[0] = r->rorg[0] + r->rot*r->rdir[0]; |
88 |
< |
r->rop[1] = r->rorg[1] + r->rot*r->rdir[1]; |
89 |
< |
r->rop[2] = r->rorg[2] + r->rot*r->rdir[2]; |
90 |
< |
} else { |
91 |
< |
r->ro = NULL; |
92 |
< |
r->rot = FHUGE; |
93 |
< |
} |
84 |
> |
r->ro = NULL; |
85 |
> |
r->rot = FHUGE; |
86 |
|
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
87 |
|
setcolor(r->pcol, 1.0, 1.0, 1.0); |
88 |
|
setcolor(r->rcol, 0.0, 0.0, 0.0); |
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; |
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; |