| 72 |
|
hlist[0] = r->rno; |
| 73 |
|
hlist[1] = dp->t; |
| 74 |
|
hlist[2] = dp->p; |
| 75 |
< |
peano(spt, 2, urand(ilhash(hlist,3)+dp->n), .01); |
| 75 |
> |
multisamp(spt, 2, urand(ilhash(hlist,3)+dp->n)); |
| 76 |
|
zd = sqrt((dp->t + spt[0])/h->nt); |
| 77 |
|
phi = 2.0*PI * (dp->p + spt[1])/h->np; |
| 78 |
|
xd = cos(phi) * zd; |
| 206 |
|
b = 1.0/ndivs; |
| 207 |
|
scalecolor(acol, b); |
| 208 |
|
if (arad <= FTINY) |
| 209 |
– |
arad = FHUGE; |
| 210 |
– |
else |
| 211 |
– |
arad = (ndivs+ns)/arad; |
| 212 |
– |
if (arad > maxarad) |
| 209 |
|
arad = maxarad; |
| 210 |
< |
else if (arad < minarad) |
| 210 |
> |
else { |
| 211 |
> |
arad = (ndivs+ns)/arad; |
| 212 |
> |
if (arad > maxarad) |
| 213 |
> |
arad = maxarad; |
| 214 |
> |
} |
| 215 |
> |
if (pg != NULL) { /* reduce radius if gradient large */ |
| 216 |
> |
d = DOT(pg,pg); |
| 217 |
> |
if (d*arad*arad > 1.0) |
| 218 |
> |
arad = 1.0/sqrt(d); |
| 219 |
> |
} |
| 220 |
> |
if (arad < minarad) { |
| 221 |
|
arad = minarad; |
| 222 |
< |
arad /= sqrt(wt); |
| 223 |
< |
if (pg != NULL) { /* clip pos. gradient if too large */ |
| 218 |
< |
d = 4.0*DOT(pg,pg)*arad*arad; |
| 219 |
< |
if (d > 1.0) { |
| 220 |
< |
d = 1.0/sqrt(d); |
| 222 |
> |
if (pg != NULL && d*arad*arad > 1.0) { /* cap gradient */ |
| 223 |
> |
d = 1.0/arad/sqrt(d); |
| 224 |
|
for (i = 0; i < 3; i++) |
| 225 |
|
pg[i] *= d; |
| 226 |
|
} |
| 227 |
|
} |
| 228 |
< |
return(arad); |
| 228 |
> |
return(arad/sqrt(wt)); |
| 229 |
|
oopsy: |
| 230 |
|
if (div != NULL) |
| 231 |
|
free((char *)div); |
| 240 |
|
{ |
| 241 |
|
register int i; |
| 242 |
|
/* set number of divisions */ |
| 243 |
+ |
if (wt < (.25*PI)/ambdiv+FTINY) { |
| 244 |
+ |
hp->nt = hp->np = 0; |
| 245 |
+ |
return; /* zero samples */ |
| 246 |
+ |
} |
| 247 |
|
hp->nt = sqrt(ambdiv * wt / PI) + 0.5; |
| 248 |
< |
hp->np = PI * hp->nt; |
| 248 |
> |
hp->np = PI * hp->nt + 0.5; |
| 249 |
|
/* make axes */ |
| 250 |
|
VCOPY(hp->uz, r->ron); |
| 251 |
|
hp->uy[0] = hp->uy[1] = hp->uy[2] = 0.0; |
| 336 |
|
if (i > 0) { |
| 337 |
|
d = dp[-hp->np].r; |
| 338 |
|
if (dp[0].r > d) d = dp[0].r; |
| 339 |
< |
d *= 1.0 - sqrt((double)i/hp->nt); |
| 339 |
> |
d *= 1.0 - (double)i/hp->nt; /* cos(t)^2 */ |
| 340 |
|
mag0 += d*(b - bright(dp[-hp->np].v)); |
| 341 |
|
} |
| 342 |
|
if (j > 0) { |
| 384 |
|
error(CONSISTENCY, |
| 385 |
|
"division order in dirgradient"); |
| 386 |
|
#endif |
| 387 |
< |
mag += sqrt((i+.5)/hp->nt)*bright(dp->v); |
| 387 |
> |
mag += sqrt((i+.5)/hp->nt)*bright(dp->v); /* sin(t) */ |
| 388 |
|
dp += hp->np; |
| 389 |
|
} |
| 390 |
|
phi = 2.0*PI * (j+.5)/hp->np + PI/2.0; |
