| 67 |
|
|
| 68 |
|
int do_irrad = 0; /* compute irradiance? */ |
| 69 |
|
|
| 70 |
+ |
int rand_samp = 0; /* pure Monte Carlo sampling? */ |
| 71 |
+ |
|
| 72 |
|
double dstrsrc = 0.0; /* square source distribution */ |
| 73 |
|
double shadthresh = .05; /* shadow threshold */ |
| 74 |
|
double shadcert = .5; /* shadow certainty */ |
| 678 |
|
} |
| 679 |
|
vdist = ourview.vdist; |
| 680 |
|
|
| 681 |
< |
samplendx = pixnumber(x,y,hres,vres); /* set pixel index */ |
| 681 |
> |
if (rand_samp) /* set pixel index */ |
| 682 |
> |
samplendx = random(); |
| 683 |
> |
else |
| 684 |
> |
samplendx = pixnumber(x,y,hres,vres); |
| 685 |
|
|
| 686 |
|
/* optional motion blur */ |
| 687 |
|
if (lastview.type && mblur > FTINY && (lmax = viewray(lorg, ldir, |
| 699 |
|
} |
| 700 |
|
/* optional depth-of-field */ |
| 701 |
|
if (dblur > FTINY && vdist > FTINY) { |
| 702 |
< |
double vc, df[2]; |
| 703 |
< |
df[0] = PI/4.*dblur*(.5 - frandom())/sqrt(ourview.hn2); |
| 704 |
< |
df[1] = PI/4.*dblur*(.5 - frandom())/sqrt(ourview.vn2); |
| 705 |
< |
for (i = 3; i--; ) { |
| 706 |
< |
vc = thisray.rorg[i] + vdist*thisray.rdir[i]; |
| 707 |
< |
thisray.rorg[i] += df[0]*ourview.hvec[i] + |
| 708 |
< |
df[1]*ourview.vvec[i] ; |
| 709 |
< |
thisray.rdir[i] = vc - thisray.rorg[i]; |
| 702 |
> |
double vc, dfh, dfv; |
| 703 |
> |
/* PI/4. square/circle conv. */ |
| 704 |
> |
dfh = PI/4.*dblur*(.5 - frandom()); |
| 705 |
> |
dfv = PI/4.*dblur*(.5 - frandom()); |
| 706 |
> |
if (ourview.type == VT_PER || ourview.type == VT_PAR) { |
| 707 |
> |
dfh /= sqrt(ourview.hn2); |
| 708 |
> |
dfv /= sqrt(ourview.vn2); |
| 709 |
> |
for (i = 3; i--; ) { |
| 710 |
> |
vc = thisray.rorg[i] + vdist*thisray.rdir[i]; |
| 711 |
> |
thisray.rorg[i] += dfh*ourview.hvec[i] + |
| 712 |
> |
dfv*ourview.vvec[i] ; |
| 713 |
> |
thisray.rdir[i] = vc - thisray.rorg[i]; |
| 714 |
> |
} |
| 715 |
> |
} else { /* non-standard view case */ |
| 716 |
> |
double dfd = PI/4.*dblur*(.5 - frandom()); |
| 717 |
> |
if (ourview.type != VT_ANG) { |
| 718 |
> |
if (ourview.type != VT_CYL) |
| 719 |
> |
dfh /= sqrt(ourview.hn2); |
| 720 |
> |
dfv /= sqrt(ourview.vn2); |
| 721 |
> |
} |
| 722 |
> |
for (i = 3; i--; ) { |
| 723 |
> |
vc = thisray.rorg[i] + vdist*thisray.rdir[i]; |
| 724 |
> |
thisray.rorg[i] += dfh*ourview.hvec[i] + |
| 725 |
> |
dfv*ourview.vvec[i] + |
| 726 |
> |
dfd*ourview.vdir[i] ; |
| 727 |
> |
thisray.rdir[i] = vc - thisray.rorg[i]; |
| 728 |
> |
} |
| 729 |
|
} |
| 730 |
|
if (normalize(thisray.rdir) == 0.0) |
| 731 |
|
return(0.0); |
| 732 |
|
} |
| 733 |
|
|
| 734 |
< |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
| 734 |
> |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
| 735 |
|
|
| 736 |
|
rayvalue(&thisray); /* trace ray */ |
| 737 |
|
|
