| 1 |
< |
/* Copyright (c) 1986 Regents of the University of California */ |
| 1 |
> |
/* Copyright (c) 1991 Regents of the University of California */ |
| 2 |
|
|
| 3 |
|
#ifndef lint |
| 4 |
|
static char SCCSid[] = "$SunId$ LBL"; |
| 129 |
|
register RAY *r; |
| 130 |
|
{ |
| 131 |
|
NORMDAT nd; |
| 132 |
+ |
double transtest, transdist; |
| 133 |
|
double dtmp; |
| 134 |
|
COLOR ctmp; |
| 135 |
|
register int i; |
| 156 |
|
nd.pdot = raynormal(nd.pnorm, r); /* perturb normal */ |
| 157 |
|
multcolor(nd.mcolor, r->pcol); /* modify material color */ |
| 158 |
|
r->rt = r->rot; /* default ray length */ |
| 159 |
+ |
transtest = 0; |
| 160 |
|
/* get specular component */ |
| 161 |
|
nd.rspec = m->oargs.farg[3]; |
| 162 |
|
|
| 183 |
|
rayvalue(&lr); |
| 184 |
|
multcolor(lr.rcol, nd.scolor); |
| 185 |
|
addcolor(r->rcol, lr.rcol); |
| 184 |
– |
if (nd.rspec > 0.5 && m->omod == OVOID) |
| 185 |
– |
r->rt = r->rot + lr.rt; |
| 186 |
|
} |
| 187 |
|
} |
| 188 |
|
} |
| 197 |
|
if (nd.tspec > FTINY && nd.alpha2 <= FTINY) { |
| 198 |
|
RAY lr; |
| 199 |
|
if (rayorigin(&lr, r, TRANS, nd.tspec) == 0) { |
| 200 |
< |
VCOPY(lr.rdir, r->rdir); |
| 200 |
> |
if (DOT(r->pert,r->pert) > FTINY*FTINY) { |
| 201 |
> |
for (i = 0; i < 3; i++) /* perturb direction */ |
| 202 |
> |
lr.rdir[i] = r->rdir[i] - |
| 203 |
> |
.75*r->pert[i]; |
| 204 |
> |
normalize(lr.rdir); |
| 205 |
> |
} else { |
| 206 |
> |
VCOPY(lr.rdir, r->rdir); |
| 207 |
> |
transtest = 2; |
| 208 |
> |
} |
| 209 |
|
rayvalue(&lr); |
| 210 |
|
scalecolor(lr.rcol, nd.tspec); |
| 211 |
+ |
multcolor(lr.rcol, nd.mcolor); /* modified by color */ |
| 212 |
|
addcolor(r->rcol, lr.rcol); |
| 213 |
< |
if (nd.tspec > .5) |
| 214 |
< |
r->rt = r->rot + lr.rt; |
| 213 |
> |
transtest *= bright(lr.rcol); |
| 214 |
> |
transdist = r->rot + lr.rt; |
| 215 |
|
} |
| 216 |
|
} |
| 217 |
|
if (r->crtype & SHADOW) /* the rest is shadow */ |
| 244 |
|
} |
| 245 |
|
/* add direct component */ |
| 246 |
|
direct(r, dirnorm, &nd); |
| 247 |
+ |
/* check distance */ |
| 248 |
+ |
if (transtest > bright(r->rcol)) |
| 249 |
+ |
r->rt = transdist; |
| 250 |
|
} |
