| 74 |
|
double ldot; |
| 75 |
|
double dtmp, d2; |
| 76 |
|
FVECT vtmp; |
| 77 |
– |
register int i; |
| 77 |
|
COLOR ctmp; |
| 78 |
|
|
| 79 |
|
setcolor(cval, 0.0, 0.0, 0.0); |
| 105 |
|
if (np->specfl & SP_FLAT) |
| 106 |
|
dtmp += omega/(4.0*PI); |
| 107 |
|
/* delta */ |
| 108 |
< |
for (i = 0; i < 3; i++) |
| 109 |
< |
vtmp[i] = ldir[i] - np->rp->rdir[i]; |
| 108 |
> |
vtmp[0] = ldir[0] - np->rp->rdir[0]; |
| 109 |
> |
vtmp[1] = ldir[1] - np->rp->rdir[1]; |
| 110 |
> |
vtmp[2] = ldir[2] - np->rp->rdir[2]; |
| 111 |
|
d2 = DOT(vtmp, np->pnorm); |
| 112 |
|
d2 = 2.0 - 2.0*d2/sqrt(DOT(vtmp,vtmp)); |
| 113 |
|
/* gaussian */ |
| 135 |
|
* is always modified by material color. |
| 136 |
|
*/ |
| 137 |
|
/* roughness + source */ |
| 138 |
< |
dtmp = np->alpha2/2.0 + omega/(2.0*PI); |
| 138 |
> |
dtmp = np->alpha2/4.0 + omega/PI; |
| 139 |
|
/* gaussian */ |
| 140 |
< |
dtmp = exp((DOT(np->prdir,ldir)-1.)/dtmp)/(2.*PI)/dtmp; |
| 140 |
> |
dtmp = exp((2.*DOT(np->prdir,ldir)-2.)/dtmp)/(4.*PI*dtmp); |
| 141 |
|
/* worth using? */ |
| 142 |
|
if (dtmp > FTINY) { |
| 143 |
|
copycolor(ctmp, np->mcolor); |
| 144 |
< |
dtmp *= np->tspec * omega * sqrt(ldot/np->pdot); |
| 144 |
> |
dtmp *= np->tspec * omega * sqrt(-ldot/np->pdot); |
| 145 |
|
scalecolor(ctmp, dtmp); |
| 146 |
|
addcolor(cval, ctmp); |
| 147 |
|
} |
