| 21 |
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#include "ambient.h" |
| 22 |
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#include "random.h" |
| 23 |
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|
| 24 |
< |
#ifdef NEWAMB |
| 24 |
> |
#ifndef OLDAMB |
| 25 |
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|
| 26 |
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extern void SDsquare2disk(double ds[2], double seedx, double seedy); |
| 27 |
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|
| 68 |
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setcolor(ar.rcoef, AVGREFL, AVGREFL, AVGREFL); |
| 69 |
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else |
| 70 |
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copycolor(ar.rcoef, hp->acoef); |
| 71 |
< |
if (rayorigin(&ar, AMBIENT, hp->rp, ar.rcoef) < 0) { |
| 72 |
< |
if (!n) memset(ap, 0, sizeof(AMBSAMP)); |
| 71 |
> |
if (rayorigin(&ar, AMBIENT, hp->rp, ar.rcoef) < 0) |
| 72 |
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return(0); |
| 74 |
– |
} |
| 73 |
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if (ambacc > FTINY) { |
| 74 |
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multcolor(ar.rcoef, hp->acoef); |
| 75 |
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scalecolor(ar.rcoef, 1./AVGREFL); |
| 78 |
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hlist[1] = j; |
| 79 |
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hlist[2] = i; |
| 80 |
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multisamp(spt, 2, urand(ilhash(hlist,3)+n)); |
| 81 |
< |
if (!n) { /* avoid border samples for n==0 */ |
| 81 |
> |
/* avoid coincident samples */ |
| 82 |
> |
if (!n && (0 < i) & (i < hp->ns-1) && |
| 83 |
> |
(0 < j) & (j < hp->ns-1)) { |
| 84 |
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if ((spt[0] < 0.1) | (spt[0] >= 0.9)) |
| 85 |
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spt[0] = 0.1 + 0.8*frandom(); |
| 86 |
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if ((spt[1] < 0.1) | (spt[1] >= 0.9)) |
| 99 |
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if (ar.rt <= FTINY) |
| 100 |
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return(0); /* should never happen */ |
| 101 |
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multcolor(ar.rcol, ar.rcoef); /* apply coefficient */ |
| 102 |
< |
if (!n || ar.rt*ap->d < 1.0) /* new/closer distance? */ |
| 102 |
> |
if (ar.rt*ap->d < 1.0) /* new/closer distance? */ |
| 103 |
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ap->d = 1.0/ar.rt; |
| 104 |
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if (!n) { /* record first vertex & value */ |
| 105 |
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if (ar.rt > 10.0*thescene.cusize) |
| 180 |
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float *earr = getambdiffs(hp); |
| 181 |
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double e2rem = 0; |
| 182 |
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AMBSAMP *ap; |
| 183 |
– |
RAY ar; |
| 183 |
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float *ep; |
| 184 |
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int i, j, n, nss; |
| 185 |
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|
| 194 |
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if (e2rem <= FTINY) |
| 195 |
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goto done; /* nothing left to do */ |
| 196 |
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nss = *ep/e2rem*cnt + frandom(); |
| 197 |
< |
for (n = 1; n <= nss; n++) |
| 198 |
< |
cnt -= ambsample(hp, i, j, n); |
| 197 |
> |
for (n = 1; n <= nss && ambsample(hp,i,j,n); n++) |
| 198 |
> |
--cnt; |
| 199 |
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e2rem -= *ep++; /* update remainder */ |
| 200 |
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} |
| 201 |
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done: |
| 228 |
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hp->rp = r; |
| 229 |
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hp->ns = n; |
| 230 |
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hp->acol[RED] = hp->acol[GRN] = hp->acol[BLU] = 0.0; |
| 231 |
+ |
memset(hp->sa, 0, sizeof(AMBSAMP)*n*n); |
| 232 |
|
hp->sampOK = 0; |
| 233 |
|
/* assign coefficient */ |
| 234 |
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copycolor(hp->acoef, rcol); |
| 235 |
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d = 1.0/(n*n); |
| 236 |
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scalecolor(hp->acoef, d); |
| 237 |
|
/* make tangent plane axes */ |
| 238 |
< |
hp->uy[0] = 0.5 - frandom(); |
| 239 |
< |
hp->uy[1] = 0.5 - frandom(); |
| 240 |
< |
hp->uy[2] = 0.5 - frandom(); |
| 241 |
< |
for (i = 3; i--; ) |
| 242 |
< |
if ((-0.6 < r->ron[i]) & (r->ron[i] < 0.6)) |
| 243 |
< |
break; |
| 244 |
< |
if (i < 0) |
| 238 |
> |
if (!getperpendicular(hp->ux, r->ron, 1)) |
| 239 |
|
error(CONSISTENCY, "bad ray direction in samp_hemi"); |
| 246 |
– |
hp->uy[i] = 1.0; |
| 247 |
– |
VCROSS(hp->ux, hp->uy, r->ron); |
| 248 |
– |
normalize(hp->ux); |
| 240 |
|
VCROSS(hp->uy, r->ron, hp->ux); |
| 241 |
|
/* sample divisions */ |
| 242 |
|
for (i = hp->ns; i--; ) |
| 600 |
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ambcorral(AMBHEMI *hp, FVECT uv[2], const double r0, const double r1) |
| 601 |
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{ |
| 602 |
|
const double max_d = 1.0/(minarad*ambacc + 0.001); |
| 603 |
< |
const double ang_res = 0.5*PI/(hp->ns-1); |
| 604 |
< |
const double ang_step = ang_res/((int)(16/PI*ang_res) + (1+FTINY)); |
| 603 |
> |
const double ang_res = 0.5*PI/hp->ns; |
| 604 |
> |
const double ang_step = ang_res/((int)(16/PI*ang_res) + 1.01); |
| 605 |
|
double avg_d = 0; |
| 606 |
|
uint32 flgs = 0; |
| 607 |
|
FVECT vec; |
| 608 |
< |
double d, u, v; |
| 608 |
> |
double u, v; |
| 609 |
|
double ang, a1; |
| 610 |
|
int i, j; |
| 611 |
|
/* don't bother for a few samples */ |
| 627 |
|
if ((ap->d <= FTINY) | (ap->d >= max_d)) |
| 628 |
|
continue; /* too far or too near */ |
| 629 |
|
VSUB(vec, ap->p, hp->rp->rop); |
| 630 |
< |
d = DOT(vec, hp->rp->ron); |
| 631 |
< |
d = 1.0/sqrt(DOT(vec,vec) - d*d); |
| 632 |
< |
u = DOT(vec, uv[0]) * d; |
| 642 |
< |
v = DOT(vec, uv[1]) * d; |
| 643 |
< |
if ((r0*r0*u*u + r1*r1*v*v) * ap->d*ap->d <= 1.0) |
| 630 |
> |
u = DOT(vec, uv[0]); |
| 631 |
> |
v = DOT(vec, uv[1]); |
| 632 |
> |
if ((r0*r0*u*u + r1*r1*v*v) * ap->d*ap->d <= u*u + v*v) |
| 633 |
|
continue; /* occluder outside ellipse */ |
| 634 |
|
ang = atan2a(v, u); /* else set direction flags */ |
| 635 |
< |
for (a1 = ang-.5*ang_res; a1 <= ang+.5*ang_res; a1 += ang_step) |
| 635 |
> |
for (a1 = ang-ang_res; a1 <= ang+ang_res; a1 += ang_step) |
| 636 |
|
flgs |= 1L<<(int)(16/PI*(a1 + 2.*PI*(a1 < 0))); |
| 637 |
|
} |
| 638 |
|
/* add low-angle incident (< 20deg) */ |
| 685 |
|
return(0); |
| 686 |
|
|
| 687 |
|
if ((ra == NULL) & (pg == NULL) & (dg == NULL) || |
| 688 |
< |
(hp->sampOK < 0) | (hp->ns < 4)) { |
| 688 |
> |
(hp->sampOK < 0) | (hp->ns < 6)) { |
| 689 |
|
free(hp); /* Hessian not requested/possible */ |
| 690 |
|
return(-1); /* value-only return value */ |
| 691 |
|
} |
