| 54 |
|
} |
| 55 |
|
|
| 56 |
|
|
| 57 |
– |
double |
| 57 |
|
divsample(dp, h, r) /* sample a division */ |
| 58 |
|
register AMBSAMP *dp; |
| 59 |
|
AMBHEMI *h; |
| 67 |
|
register int i; |
| 68 |
|
|
| 69 |
|
if (rayorigin(&ar, r, AMBIENT, 0.5) < 0) |
| 70 |
< |
return(0.0); |
| 70 |
> |
return(-1); |
| 71 |
|
hlist[0] = r->rno; |
| 72 |
|
hlist[1] = dp->t; |
| 73 |
|
hlist[2] = dp->p; |
| 86 |
|
rayvalue(&ar); |
| 87 |
|
ndims--; |
| 88 |
|
addcolor(dp->v, ar.rcol); |
| 89 |
< |
if (ar.rot < FHUGE) |
| 90 |
< |
dp->r += 1.0/ar.rot; |
| 89 |
> |
if (ar.rt < FHUGE) |
| 90 |
> |
dp->r += 1.0/ar.rt; |
| 91 |
|
/* (re)initialize error */ |
| 92 |
|
if (dp->n++) { |
| 93 |
|
b2 = bright(dp->v)/dp->n - bright(ar.rcol); |
| 95 |
|
dp->k = b2/(dp->n*dp->n); |
| 96 |
|
} else |
| 97 |
|
dp->k = 0.0; |
| 98 |
< |
return(ar.rot); |
| 98 |
> |
return(0); |
| 99 |
|
} |
| 100 |
|
|
| 101 |
|
|
| 138 |
|
setcolor(dp->v, 0.0, 0.0, 0.0); |
| 139 |
|
dp->r = 0.0; |
| 140 |
|
dp->n = 0; |
| 141 |
< |
if ((d = divsample(dp, &hemi, r)) == 0.0) |
| 141 |
> |
if (divsample(dp, &hemi, r) < 0) |
| 142 |
|
goto oopsy; |
| 143 |
|
if (div != NULL) |
| 144 |
|
dp++; |
| 148 |
|
} |
| 149 |
|
} |
| 150 |
|
if (ns > 0) { /* perform super-sampling */ |
| 151 |
< |
comperrs(div, hemi); /* compute errors */ |
| 151 |
> |
comperrs(div, &hemi); /* compute errors */ |
| 152 |
|
qsort(div, ndivs, sizeof(AMBSAMP), ambcmp); /* sort divs */ |
| 154 |
– |
dp = div + ndivs; /* skim excess */ |
| 155 |
– |
for (i = ndivs; i > ns; i--) { |
| 156 |
– |
dp--; |
| 157 |
– |
addcolor(acol, dp->v); |
| 158 |
– |
arad += dp->r; |
| 159 |
– |
} |
| 153 |
|
/* super-sample */ |
| 154 |
|
for (i = ns; i > 0; i--) { |
| 155 |
|
copystruct(&dnew, div); |
| 156 |
< |
if ((d = divsample(&dnew, &hemi)) == 0.0) |
| 156 |
> |
if (divsample(&dnew, &hemi, r) < 0) |
| 157 |
|
goto oopsy; |
| 165 |
– |
if (d < FHUGE) |
| 166 |
– |
arad += 1.0 / d; |
| 158 |
|
/* reinsert */ |
| 159 |
|
dp = div; |
| 160 |
|
j = ndivs < i ? ndivs : i; |
| 163 |
|
dp++; |
| 164 |
|
} |
| 165 |
|
copystruct(dp, &dnew); |
| 175 |
– |
/* extract darkest */ |
| 176 |
– |
if (i <= ndivs) { |
| 177 |
– |
dp = div + i-1; |
| 178 |
– |
arad += dp->r; |
| 179 |
– |
if (dp->n > 1) { |
| 180 |
– |
b = 1.0/dp->n; |
| 181 |
– |
scalecolor(dp->v, b); |
| 182 |
– |
dp->r *= b; |
| 183 |
– |
dp->n = 1; |
| 184 |
– |
} |
| 185 |
– |
addcolor(acol, dp->v); |
| 186 |
– |
} |
| 166 |
|
} |
| 167 |
|
if (pg != NULL || dg != NULL) /* restore order */ |
| 168 |
|
qsort(div, ndivs, sizeof(AMBSAMP), ambnorm); |
| 169 |
|
} |
| 170 |
|
/* compute returned values */ |
| 171 |
< |
if (pg != NULL) |
| 172 |
< |
posgradient(pg, div, &hemi); |
| 173 |
< |
if (dg != NULL) |
| 174 |
< |
dirgradient(dg, div, &hemi); |
| 175 |
< |
if (div != NULL) |
| 171 |
> |
if (div != NULL) { |
| 172 |
> |
for (i = ndivs, dp = div; i-- > 0; dp++) { |
| 173 |
> |
arad += dp->r; |
| 174 |
> |
if (dp->n > 1) { |
| 175 |
> |
b = 1.0/dp->n; |
| 176 |
> |
scalecolor(dp->v, b); |
| 177 |
> |
dp->r *= b; |
| 178 |
> |
dp->n = 1; |
| 179 |
> |
} |
| 180 |
> |
addcolor(acol, dp->v); |
| 181 |
> |
} |
| 182 |
> |
if (pg != NULL) |
| 183 |
> |
posgradient(pg, div, &hemi); |
| 184 |
> |
if (dg != NULL) |
| 185 |
> |
dirgradient(dg, div, &hemi); |
| 186 |
|
free((char *)div); |
| 187 |
+ |
} |
| 188 |
|
b = 1.0/ndivs; |
| 189 |
|
scalecolor(acol, b); |
| 190 |
|
if (arad <= FTINY) |
| 221 |
|
if (i >= 3) |
| 222 |
|
error(CONSISTENCY, "bad ray direction in inithemi"); |
| 223 |
|
hp->uy[i] = 1.0; |
| 224 |
< |
fcross(hp->ux, hp->uz, hp->uy); |
| 224 |
> |
fcross(hp->ux, hp->uy, hp->uz); |
| 225 |
|
normalize(hp->ux); |
| 226 |
< |
fcross(hp->uy, hp->ux, hp->uz); |
| 226 |
> |
fcross(hp->uy, hp->uz, hp->ux); |
| 227 |
|
} |
| 228 |
|
|
| 229 |
|
|
| 250 |
|
b2 *= b2 * 0.25; |
| 251 |
|
dp[0].k += b2; |
| 252 |
|
dp[-1].k += b2; |
| 253 |
< |
} |
| 254 |
< |
if (j == hp->np-1) { /* around */ |
| 265 |
< |
b2 = bright(dp[-(hp->np-1)].v) - b; |
| 253 |
> |
} else { /* around */ |
| 254 |
> |
b2 = bright(dp[hp->np-1].v) - b; |
| 255 |
|
b2 *= b2 * 0.25; |
| 256 |
|
dp[0].k += b2; |
| 257 |
< |
dp[-(hp->np-1)].k += b2; |
| 257 |
> |
dp[hp->np-1].k += b2; |
| 258 |
|
} |
| 259 |
|
dp++; |
| 260 |
|
} |
| 312 |
|
dp += hp->np; |
| 313 |
|
} |
| 314 |
|
if (hp->nt > 1) { |
| 315 |
< |
mag0 /= (double)(hp->nt-1); |
| 315 |
> |
mag0 /= (double)hp->np; |
| 316 |
|
mag1 /= (double)hp->nt; |
| 317 |
|
} |
| 318 |
|
phi = 2.0*PI * (double)j/hp->np; |
| 321 |
|
yd += mag0*sinp + mag1*cosp; |
| 322 |
|
} |
| 323 |
|
for (i = 0; i < 3; i++) |
| 324 |
< |
gv[i] = (xd*hp->ux[i] + yd*hp->uy[i])/hp->np; |
| 324 |
> |
gv[i] = xd*hp->ux[i] + yd*hp->uy[i]; |
| 325 |
|
} |
| 326 |
|
|
| 327 |
|
|
