74 |
|
COLOR ctrans; |
75 |
|
COLOR talb; |
76 |
|
int hastexture; |
77 |
+ |
double transdist, transtest=0; |
78 |
+ |
double mirdist, mirtest=0; |
79 |
+ |
int flatsurface; |
80 |
|
double refl, trans; |
81 |
|
FVECT dnorm; |
82 |
|
double d1, d2; |
94 |
|
VCOPY(dnorm, r->ron); |
95 |
|
cos1 = r->rod; |
96 |
|
} |
97 |
+ |
flatsurface = !hastexture && r->ro != NULL && isflat(r->ro->otype); |
98 |
+ |
|
99 |
|
/* index of refraction */ |
100 |
|
if (m->otype == MAT_DIELECTRIC) |
101 |
|
nratio = m->oargs.farg[3] + m->oargs.farg[4]/MLAMBDA; |
164 |
|
|
165 |
|
trans *= nratio*nratio; /* solid angle ratio */ |
166 |
|
|
167 |
< |
if (rayorigin(&p, r, REFRACTED, trans) == 0) { |
167 |
> |
setcolor(p.rcoef, trans, trans, trans); |
168 |
|
|
169 |
+ |
if (rayorigin(&p, REFRACTED, r, p.rcoef) == 0) { |
170 |
+ |
|
171 |
|
/* compute refracted ray */ |
172 |
|
d1 = nratio*cos1 - cos2; |
173 |
|
for (i = 0; i < 3; i++) |
194 |
|
copycolor(p.cext, ctrans); |
195 |
|
copycolor(p.albedo, talb); |
196 |
|
rayvalue(&p); |
197 |
< |
scalecolor(p.rcol, trans); |
197 |
> |
multcolor(p.rcol, p.rcoef); |
198 |
|
addcolor(r->rcol, p.rcol); |
199 |
< |
if (nratio >= 1.0-FTINY && nratio <= 1.0+FTINY) |
200 |
< |
r->rt = r->rot + p.rt; |
199 |
> |
/* virtual distance */ |
200 |
> |
if (flatsurface || |
201 |
> |
(1.-FTINY <= nratio && |
202 |
> |
nratio <= 1.+FTINY)) { |
203 |
> |
transtest = 2*bright(p.rcol); |
204 |
> |
transdist = r->rot + p.rt; |
205 |
> |
} |
206 |
|
} |
207 |
|
} |
208 |
|
} |
209 |
< |
|
209 |
> |
setcolor(p.rcoef, refl, refl, refl); |
210 |
> |
|
211 |
|
if (!(r->crtype & SHADOW) && |
212 |
< |
rayorigin(&p, r, REFLECTED, refl) == 0) { |
212 |
> |
rayorigin(&p, REFLECTED, r, p.rcoef) == 0) { |
213 |
|
|
214 |
|
/* compute reflected ray */ |
215 |
|
for (i = 0; i < 3; i++) |
221 |
|
|
222 |
|
rayvalue(&p); /* reflected ray value */ |
223 |
|
|
224 |
< |
scalecolor(p.rcol, refl); /* color contribution */ |
224 |
> |
multcolor(p.rcol, p.rcoef); /* color contribution */ |
225 |
|
addcolor(r->rcol, p.rcol); |
226 |
+ |
/* virtual distance */ |
227 |
+ |
if (flatsurface) { |
228 |
+ |
mirtest = 2*bright(p.rcol); |
229 |
+ |
mirdist = r->rot + p.rt; |
230 |
+ |
} |
231 |
|
} |
232 |
+ |
/* check distance to return */ |
233 |
+ |
d1 = bright(r->rcol); |
234 |
+ |
if (transtest > d1) |
235 |
+ |
r->rt = transdist; |
236 |
+ |
else if (mirtest > d1) |
237 |
+ |
r->rt = mirdist; |
238 |
|
/* rayvalue() computes absorption */ |
239 |
|
return(1); |
240 |
|
} |
252 |
|
COLOR abt |
253 |
|
) |
254 |
|
{ |
255 |
< |
RAY sray, *entray; |
255 |
> |
RAY sray; |
256 |
> |
const RAY *entray; |
257 |
|
FVECT v1, v2, n1, n2; |
258 |
|
FVECT dv, v2Xdv; |
259 |
|
double v2Xdvv2Xdv; |