23 |
|
|
24 |
|
#ifdef NEWAMB |
25 |
|
|
26 |
– |
/* #define HEM_MULT 4.0 /* hem multiplier (bigger => sparser cache) */ |
27 |
– |
|
26 |
|
extern void SDsquare2disk(double ds[2], double seedx, double seedy); |
27 |
|
|
28 |
|
/* vertex direction bit positions */ |
105 |
|
case VDB_xY: return(db2==VDB_x ? VDB_y : VDB_X); |
106 |
|
case VDB_Xy: return(db2==VDB_y ? VDB_x : VDB_Y); |
107 |
|
} |
108 |
< |
error(INTERNAL, "forbidden diagonal in vdb_edge()"); |
108 |
> |
error(CONSISTENCY, "forbidden diagonal in vdb_edge()"); |
109 |
|
return(-1); |
110 |
|
} |
111 |
|
|
225 |
|
static float * |
226 |
|
getambdiffs(AMBHEMI *hp) |
227 |
|
{ |
228 |
< |
float *earr = (float *)calloc(hp->ns*hp->ns, sizeof(float)); |
228 |
> |
float *earr = (float *)malloc(sizeof(float)*hp->ns*hp->ns); |
229 |
|
float *ep; |
230 |
|
AMBSAMP *ap; |
231 |
|
double b, d2; |
236 |
|
/* compute squared neighbor diffs */ |
237 |
|
for (ap = hp->sa, ep = earr, i = 0; i < hp->ns; i++) |
238 |
|
for (j = 0; j < hp->ns; j++, ap++, ep++) { |
239 |
+ |
ep[0] = FTINY; |
240 |
|
b = bright(ap[0].v); |
241 |
|
if (i) { /* from above */ |
242 |
|
d2 = b - bright(ap[-hp->ns].v); |
273 |
|
ambsupersamp(double acol[3], AMBHEMI *hp, int cnt) |
274 |
|
{ |
275 |
|
float *earr = getambdiffs(hp); |
276 |
< |
double e2sum = 0; |
276 |
> |
double e2rem = 0; |
277 |
|
AMBSAMP *ap; |
278 |
|
RAY ar; |
279 |
< |
COLOR asum; |
279 |
> |
double asum[3]; |
280 |
|
float *ep; |
281 |
|
int i, j, n; |
282 |
|
|
283 |
|
if (earr == NULL) /* just skip calc. if no memory */ |
284 |
|
return; |
285 |
< |
/* add up estimated variances */ |
285 |
> |
/* accumulate estimated variances */ |
286 |
|
for (ep = earr + hp->ns*hp->ns; ep-- > earr; ) |
287 |
< |
e2sum += *ep; |
287 |
> |
e2rem += *ep; |
288 |
|
ep = earr; /* perform super-sampling */ |
289 |
|
for (ap = hp->sa, i = 0; i < hp->ns; i++) |
290 |
|
for (j = 0; j < hp->ns; j++, ap++) { |
291 |
< |
int nss = *ep/e2sum*cnt + frandom(); |
292 |
< |
setcolor(asum, 0., 0., 0.); |
291 |
> |
int nss = *ep/e2rem*cnt + frandom(); |
292 |
> |
asum[0] = asum[1] = asum[2] = 0.0; |
293 |
|
for (n = 1; n <= nss; n++) { |
294 |
|
if (!getambsamp(&ar, hp, i, j, n)) { |
295 |
|
nss = n-1; |
298 |
|
addcolor(asum, ar.rcol); |
299 |
|
} |
300 |
|
if (nss) { /* update returned ambient value */ |
301 |
< |
const double ssf = 1./(nss + 1); |
301 |
> |
const double ssf = 1./(nss + 1.); |
302 |
|
for (n = 3; n--; ) |
303 |
< |
acol[n] += ssf*colval(asum,n) + |
303 |
> |
acol[n] += ssf*asum[n] + |
304 |
|
(ssf - 1.)*colval(ap->v,n); |
305 |
|
} |
306 |
< |
e2sum -= *ep++; /* update remainders */ |
306 |
> |
e2rem -= *ep++; /* update remainders */ |
307 |
|
cnt -= nss; |
308 |
|
} |
309 |
|
free(earr); |
538 |
|
|
539 |
|
|
540 |
|
/* Compute anisotropic radii and eigenvector directions */ |
541 |
< |
static int |
541 |
> |
static void |
542 |
|
eigenvectors(FVECT uv[2], float ra[2], FVECT hessian[3]) |
543 |
|
{ |
544 |
|
double hess2[2][2]; |
560 |
|
if (i == 1) /* double-root (circle) */ |
561 |
|
evalue[1] = evalue[0]; |
562 |
|
if (!i || ((evalue[0] = fabs(evalue[0])) <= FTINY*FTINY) | |
563 |
< |
((evalue[1] = fabs(evalue[1])) <= FTINY*FTINY) ) |
564 |
< |
error(INTERNAL, "bad eigenvalue calculation"); |
565 |
< |
|
563 |
> |
((evalue[1] = fabs(evalue[1])) <= FTINY*FTINY) ) { |
564 |
> |
ra[0] = ra[1] = maxarad; |
565 |
> |
return; |
566 |
> |
} |
567 |
|
if (evalue[0] > evalue[1]) { |
568 |
|
ra[0] = sqrt(sqrt(4.0/evalue[0])); |
569 |
|
ra[1] = sqrt(sqrt(4.0/evalue[1])); |
720 |
|
} |
721 |
|
|
722 |
|
|
723 |
< |
/* Make sure radii don't extend beyond what we see in our periphery */ |
724 |
< |
static void |
725 |
< |
hem_radii(AMBHEMI *hp, FVECT uv[2], float ra[2]) |
723 |
> |
/* Compute potential light leak direction flags for cache value */ |
724 |
> |
static uint32 |
725 |
> |
ambcorral(AMBHEMI *hp, FVECT uv[2], const double r0, const double r1) |
726 |
|
{ |
727 |
< |
#ifdef HEM_MULT |
728 |
< |
double udsum = 0, vdsum = 0; |
729 |
< |
double uwsum = 0, vwsum = 0; |
727 |
> |
const double max_d = 1.0/(minarad*ambacc + 0.001); |
728 |
> |
const double ang_res = 0.5*PI/(hp->ns-1); |
729 |
> |
const double ang_step = ang_res/((int)(16/PI*ang_res) + (1+FTINY)); |
730 |
> |
double avg_d = 0; |
731 |
> |
uint32 flgs = 0; |
732 |
|
int i, j; |
733 |
< |
/* circle around perimeter */ |
733 |
> |
/* don't bother for a few samples */ |
734 |
> |
if (hp->ns < 12) |
735 |
> |
return(0); |
736 |
> |
/* check distances overhead */ |
737 |
> |
for (i = hp->ns*3/4; i-- > hp->ns>>2; ) |
738 |
> |
for (j = hp->ns*3/4; j-- > hp->ns>>2; ) |
739 |
> |
avg_d += ambsam(hp,i,j).d; |
740 |
> |
avg_d *= 4.0/(hp->ns*hp->ns); |
741 |
> |
if (avg_d*r0 >= 1.0) /* ceiling too low for corral? */ |
742 |
> |
return(0); |
743 |
> |
if (avg_d >= max_d) /* insurance */ |
744 |
> |
return(0); |
745 |
> |
/* else circle around perimeter */ |
746 |
|
for (i = 0; i < hp->ns; i++) |
747 |
|
for (j = 0; j < hp->ns; j += !i|(i==hp->ns-1) ? 1 : hp->ns-1) { |
748 |
|
AMBSAMP *ap = &ambsam(hp,i,j); |
749 |
|
FVECT vec; |
750 |
< |
double us2, vs2; |
750 |
> |
double u, v; |
751 |
> |
double ang, a1; |
752 |
> |
int abp; |
753 |
> |
if ((ap->d <= FTINY) | (ap->d >= max_d)) |
754 |
> |
continue; /* too far or too near */ |
755 |
|
VSUB(vec, ap->p, hp->rp->rop); |
756 |
< |
us2 = DOT(vec, uv[0]) * ap->d; |
757 |
< |
us2 *= us2; |
758 |
< |
vs2 = DOT(vec, uv[1]) * ap->d; |
759 |
< |
vs2 *= vs2; |
760 |
< |
udsum += us2 * ap->d; |
761 |
< |
uwsum += us2; |
762 |
< |
vdsum += vs2 * ap->d; |
745 |
< |
vwsum += vs2; |
756 |
> |
u = DOT(vec, uv[0]) * ap->d; |
757 |
> |
v = DOT(vec, uv[1]) * ap->d; |
758 |
> |
if ((r0*r0*u*u + r1*r1*v*v) * ap->d*ap->d <= 1.0) |
759 |
> |
continue; /* occluder outside ellipse */ |
760 |
> |
ang = atan2a(v, u); /* else set direction flags */ |
761 |
> |
for (a1 = ang-.5*ang_res; a1 <= ang+.5*ang_res; a1 += ang_step) |
762 |
> |
flgs |= 1L<<(int)(16/PI*(a1 + 2.*PI*(a1 < 0))); |
763 |
|
} |
764 |
< |
uwsum *= HEM_MULT; /* adjust effective hem size */ |
748 |
< |
vwsum *= HEM_MULT; |
749 |
< |
/* cap radii (recall d=1/rt) */ |
750 |
< |
if (ra[0]*udsum > uwsum) |
751 |
< |
ra[0] = uwsum/udsum; |
752 |
< |
if (ra[1]*vdsum > vwsum) |
753 |
< |
ra[1] = vwsum/vdsum; |
754 |
< |
#endif |
764 |
> |
return(flgs); |
765 |
|
} |
766 |
|
|
767 |
|
|
773 |
|
FVECT uv[2], /* returned (optional) */ |
774 |
|
float ra[2], /* returned (optional) */ |
775 |
|
float pg[2], /* returned (optional) */ |
776 |
< |
float dg[2] /* returned (optional) */ |
776 |
> |
float dg[2], /* returned (optional) */ |
777 |
> |
uint32 *crlp /* returned (optional) */ |
778 |
|
) |
779 |
|
{ |
780 |
|
AMBHEMI *hp = inithemi(rcol, r, wt); |
794 |
|
pg[0] = pg[1] = 0.0; |
795 |
|
if (dg != NULL) |
796 |
|
dg[0] = dg[1] = 0.0; |
797 |
+ |
if (crlp != NULL) |
798 |
+ |
*crlp = 0; |
799 |
|
/* sample the hemisphere */ |
800 |
|
acol[0] = acol[1] = acol[2] = 0.0; |
801 |
|
cnt = 0; |
816 |
|
return(-1); /* return value w/o Hessian */ |
817 |
|
} |
818 |
|
cnt = ambssamp*wt + 0.5; /* perform super-sampling? */ |
819 |
< |
if (cnt > 0) |
819 |
> |
if (cnt > 8) |
820 |
|
ambsupersamp(acol, hp, cnt); |
821 |
|
copycolor(rcol, acol); /* final indirect irradiance/PI */ |
822 |
|
if ((ra == NULL) & (pg == NULL) & (dg == NULL)) { |
830 |
|
K = 1.0; |
831 |
|
pg = NULL; |
832 |
|
dg = NULL; |
833 |
+ |
crlp = NULL; |
834 |
|
} |
835 |
|
ap = hp->sa; /* relative Y channel from here on... */ |
836 |
|
for (i = hp->ns*hp->ns; i--; ap++) |
850 |
|
ra[0] = 1.0/d; |
851 |
|
if (ra[1]*(d = fabs(pg[1])) > 1.0) |
852 |
|
ra[1] = 1.0/d; |
853 |
+ |
if (ra[0] > ra[1]) |
854 |
+ |
ra[0] = ra[1]; |
855 |
|
} |
840 |
– |
hem_radii(hp, uv, ra); |
841 |
– |
if (ra[0] > ra[1]) |
842 |
– |
ra[0] = ra[1]; |
856 |
|
if (ra[0] < minarad) { |
857 |
|
ra[0] = minarad; |
858 |
|
if (ra[1] < minarad) |
866 |
|
if (ra[0] > maxarad) |
867 |
|
ra[0] = maxarad; |
868 |
|
} |
869 |
+ |
/* flag encroached directions */ |
870 |
+ |
if ((wt >= 0.5-FTINY) & (crlp != NULL)) |
871 |
+ |
*crlp = ambcorral(hp, uv, ra[0]*ambacc, ra[1]*ambacc); |
872 |
|
if (pg != NULL) { /* cap gradient if necessary */ |
873 |
|
d = pg[0]*pg[0]*ra[0]*ra[0] + pg[1]*pg[1]*ra[1]*ra[1]; |
874 |
|
if (d > 1.0) { |