| 137 |
|
if (ar.rt*ap->d < 1.0) /* new/closer distance? */ |
| 138 |
|
ap->d = 1.0/ar.rt; |
| 139 |
|
if (!n) { /* record first vertex & value */ |
| 140 |
< |
if (ar.rt > 10.0*thescene.cusize) |
| 141 |
< |
ar.rt = 10.0*thescene.cusize; |
| 140 |
> |
if (ar.rt > 10.0*thescene.cusize + 1000.) |
| 141 |
> |
ar.rt = 10.0*thescene.cusize + 1000.; |
| 142 |
|
VSUM(ap->p, ar.rorg, ar.rdir, ar.rt); |
| 143 |
|
copycolor(ap->v, ar.rcol); |
| 144 |
|
} else { /* else update recorded value */ |
| 160 |
|
static float * |
| 161 |
|
getambdiffs(AMBHEMI *hp) |
| 162 |
|
{ |
| 163 |
+ |
const double normf = 1./bright(hp->acoef); |
| 164 |
|
float *earr = (float *)calloc(hp->ns*hp->ns, sizeof(float)); |
| 165 |
|
float *ep; |
| 166 |
|
AMBSAMP *ap; |
| 174 |
|
for (j = 0; j < hp->ns; j++, ap++, ep++) { |
| 175 |
|
b = bright(ap[0].v); |
| 176 |
|
if (i) { /* from above */ |
| 177 |
< |
d2 = b - bright(ap[-hp->ns].v); |
| 177 |
> |
d2 = normf*(b - bright(ap[-hp->ns].v)); |
| 178 |
|
d2 *= d2; |
| 179 |
|
ep[0] += d2; |
| 180 |
|
ep[-hp->ns] += d2; |
| 181 |
|
} |
| 182 |
|
if (!j) continue; |
| 183 |
|
/* from behind */ |
| 184 |
< |
d2 = b - bright(ap[-1].v); |
| 184 |
> |
d2 = normf*(b - bright(ap[-1].v)); |
| 185 |
|
d2 *= d2; |
| 186 |
|
ep[0] += d2; |
| 187 |
|
ep[-1] += d2; |
| 188 |
|
if (!i) continue; |
| 189 |
|
/* diagonal */ |
| 190 |
< |
d2 = b - bright(ap[-hp->ns-1].v); |
| 190 |
> |
d2 = normf*(b - bright(ap[-hp->ns-1].v)); |
| 191 |
|
d2 *= d2; |
| 192 |
|
ep[0] += d2; |
| 193 |
|
ep[-hp->ns-1] += d2; |
| 231 |
|
goto done; /* nothing left to do */ |
| 232 |
|
nss = *ep/e2rem*cnt + frandom(); |
| 233 |
|
for (n = 1; n <= nss && ambsample(hp,i,j,n); n++) |
| 234 |
< |
--cnt; |
| 234 |
> |
if (!--cnt) goto done; |
| 235 |
|
e2rem -= *ep++; /* update remainder */ |
| 236 |
|
} |
| 237 |
|
done: |
| 249 |
|
AMBHEMI *hp; |
| 250 |
|
double d; |
| 251 |
|
int n, i, j; |
| 252 |
+ |
/* insignificance check */ |
| 253 |
+ |
if (bright(rcol) <= FTINY) |
| 254 |
+ |
return(NULL); |
| 255 |
|
/* set number of divisions */ |
| 256 |
|
if (ambacc <= FTINY && |
| 257 |
|
wt > (d = 0.8*intens(rcol)*r->rweight/(ambdiv*minweight))) |