| 186 |
|
else |
| 187 |
|
setcolor(nd.scolor, 1.0, 1.0, 1.0); |
| 188 |
|
scalecolor(nd.scolor, nd.rspec); |
| 189 |
< |
/* improved model */ |
| 190 |
< |
dtmp = exp(-BSPEC(m)*nd.pdot); |
| 191 |
< |
for (i = 0; i < 3; i++) |
| 192 |
< |
colval(nd.scolor,i) += (1.0-colval(nd.scolor,i))*dtmp; |
| 193 |
< |
nd.rspec += (1.0-nd.rspec)*dtmp; |
| 194 |
< |
/* check threshold */ |
| 195 |
< |
if (specthresh > FTINY && |
| 196 |
< |
((specthresh >= 1.-FTINY || |
| 197 |
< |
specthresh + (.05 - .1*frandom()) > nd.rspec))) |
| 189 |
> |
if (nd.specfl & SP_PURE) { /* improved model */ |
| 190 |
> |
dtmp = exp(-BSPEC(m)*nd.pdot); |
| 191 |
> |
for (i = 0; i < 3; i++) |
| 192 |
> |
colval(nd.scolor,i) += |
| 193 |
> |
(1.0-colval(nd.scolor,i))*dtmp; |
| 194 |
> |
nd.rspec += (1.0-nd.rspec)*dtmp; |
| 195 |
> |
} else if (specthresh > FTINY && /* check threshold */ |
| 196 |
> |
(specthresh >= 1.-FTINY || |
| 197 |
> |
specthresh > nd.rspec)) |
| 198 |
|
nd.specfl |= SP_RBLT; |
| 199 |
|
/* compute reflected ray */ |
| 200 |
|
for (i = 0; i < 3; i++) |
| 221 |
|
if (nd.tspec > FTINY) { |
| 222 |
|
nd.specfl |= SP_TRAN; |
| 223 |
|
/* check threshold */ |
| 224 |
< |
if (specthresh > FTINY && |
| 225 |
< |
((specthresh >= 1.-FTINY || |
| 226 |
< |
specthresh + |
| 227 |
< |
(.05 - .1*frandom()) > nd.tspec))) |
| 224 |
> |
if (!(nd.specfl & SP_PURE) && specthresh > FTINY && |
| 225 |
> |
(specthresh >= 1.-FTINY || |
| 226 |
> |
specthresh > nd.tspec)) |
| 227 |
|
nd.specfl |= SP_TBLT; |
| 228 |
|
if (r->crtype & SHADOW || |
| 229 |
|
DOT(r->pert,r->pert) <= FTINY*FTINY) { |
| 309 |
|
double rv[2]; |
| 310 |
|
double d, sinp, cosp; |
| 311 |
|
register int i; |
| 312 |
+ |
/* quick test */ |
| 313 |
+ |
if ((np->specfl & (SP_REFL|SP_RBLT)) != SP_REFL && |
| 314 |
+ |
(np->specfl & (SP_TRAN|SP_TBLT)) != SP_TRAN) |
| 315 |
+ |
return; |
| 316 |
|
/* set up sample coordinates */ |
| 317 |
|
v[0] = v[1] = v[2] = 0.0; |
| 318 |
|
for (i = 0; i < 3; i++) |
