149 |
|
h[0] = ldir[0] - np->prdir[0]; |
150 |
|
h[1] = ldir[1] - np->prdir[1]; |
151 |
|
h[2] = ldir[2] - np->prdir[2]; |
152 |
< |
dtmp = DOT(h,np->pnorm); |
153 |
< |
dtmp = DOT(h,h) - dtmp*dtmp; |
152 |
> |
dtmp = DOT(h,h); |
153 |
|
if (dtmp > FTINY*FTINY) { |
154 |
< |
dtmp1 = DOT(h,np->u); |
155 |
< |
dtmp1 = dtmp1*dtmp1 / (au2*dtmp); |
156 |
< |
dtmp2 = DOT(h,np->v); |
157 |
< |
dtmp2 = dtmp2*dtmp2 / (av2*dtmp); |
158 |
< |
dtmp = 2. - 2.*DOT(ldir,np->prdir); |
159 |
< |
dtmp *= dtmp1 + dtmp2; |
154 |
> |
dtmp1 = DOT(h,np->pnorm); |
155 |
> |
dtmp = 1.0 - dtmp1*dtmp1/dtmp; |
156 |
> |
if (dtmp > FTINY*FTINY) { |
157 |
> |
dtmp1 = DOT(h,np->u); |
158 |
> |
dtmp1 = dtmp1*dtmp1 / au2; |
159 |
> |
dtmp2 = DOT(h,np->v); |
160 |
> |
dtmp2 = dtmp2*dtmp2 / av2; |
161 |
> |
dtmp = (dtmp1 + dtmp2) / dtmp; |
162 |
> |
} |
163 |
|
} else |
164 |
|
dtmp = 0.0; |
165 |
|
/* gaussian */ |
166 |
< |
dtmp = exp(-dtmp) * 1.0/(4.0*PI) |
166 |
> |
dtmp = exp(-dtmp) * 1.0/PI |
167 |
|
* sqrt(-ldot/(np->pdot*au2*av2)); |
168 |
|
/* worth using? */ |
169 |
|
if (dtmp > FTINY) { |