97 |
|
scalecolor(ctmp, dtmp); |
98 |
|
addcolor(cval, ctmp); |
99 |
|
} |
100 |
+ |
|
101 |
+ |
if ((ldot < -FTINY) & (np->tdiff > FTINY)) { |
102 |
+ |
/* |
103 |
+ |
* Compute diffuse transmission. |
104 |
+ |
*/ |
105 |
+ |
copycolor(ctmp, np->mcolor); |
106 |
+ |
dtmp = -ldot * omega * np->tdiff * (1.0/PI); |
107 |
+ |
scalecolor(ctmp, dtmp); |
108 |
+ |
addcolor(cval, ctmp); |
109 |
+ |
} |
110 |
+ |
|
111 |
|
if (ldot > FTINY && np->specfl&SP_REFL) { |
112 |
|
/* |
113 |
|
* Compute specular reflection coefficient using |
141 |
|
addcolor(cval, ctmp); |
142 |
|
} |
143 |
|
} |
144 |
< |
if ((ldot < -FTINY) & (np->tdiff > FTINY)) { |
134 |
< |
/* |
135 |
< |
* Compute diffuse transmission. |
136 |
< |
*/ |
137 |
< |
copycolor(ctmp, np->mcolor); |
138 |
< |
dtmp = -ldot * omega * np->tdiff * (1.0/PI); |
139 |
< |
scalecolor(ctmp, dtmp); |
140 |
< |
addcolor(cval, ctmp); |
141 |
< |
} |
144 |
> |
|
145 |
|
if (ldot < -FTINY && np->specfl&SP_TRAN) { |
146 |
|
/* |
147 |
|
* Compute specular transmission. Specular transmission |
281 |
|
multambient(ctmp, r, nd.pnorm); |
282 |
|
addcolor(r->rcol, ctmp); /* add to returned color */ |
283 |
|
} |
284 |
+ |
|
285 |
|
if (nd.tdiff > FTINY) { /* ambient from other side */ |
286 |
|
FVECT bnorm; |
287 |
|
|
304 |
|
return(1); |
305 |
|
} |
306 |
|
|
303 |
– |
|
307 |
|
static void |
308 |
|
getacoords( /* set up coordinate system */ |
309 |
|
ANISODAT *np |
325 |
|
if (normalize(np->v) == 0.0) { |
326 |
|
if (fabs(np->u_alpha - np->v_alpha) > 0.001) |
327 |
|
objerror(np->mp, WARNING, "illegal orientation vector"); |
328 |
< |
getperpendicular(np->u, np->pnorm); /* punting */ |
328 |
> |
getperpendicular(np->u, np->pnorm, 1); /* punting */ |
329 |
|
fcross(np->v, np->pnorm, np->u); |
330 |
|
np->u_alpha = np->v_alpha = sqrt( 0.5 * |
331 |
|
(np->u_alpha*np->u_alpha + np->v_alpha*np->v_alpha) ); |