| 61 |
|
|
| 62 |
|
double mblur = 0.; /* motion blur parameter */ |
| 63 |
|
|
| 64 |
+ |
double dblur = 0.; /* depth-of-field blur parameter */ |
| 65 |
+ |
|
| 66 |
|
void (*trace)() = NULL; /* trace call */ |
| 67 |
|
|
| 68 |
|
int do_irrad = 0; /* compute irradiance? */ |
| 664 |
|
{ |
| 665 |
|
RAY thisray; |
| 666 |
|
FVECT lorg, ldir; |
| 667 |
< |
double hpos, vpos, lmax; |
| 667 |
> |
double hpos, vpos, vdist, lmax; |
| 668 |
> |
register int i; |
| 669 |
|
/* compute view ray */ |
| 670 |
|
hpos = (x+pixjitter())/hres; |
| 671 |
|
vpos = (y+pixjitter())/vres; |
| 674 |
|
setcolor(col, 0.0, 0.0, 0.0); |
| 675 |
|
return(0.0); |
| 676 |
|
} |
| 677 |
+ |
vdist = ourview.vdist; |
| 678 |
|
|
| 679 |
|
samplendx = pixnumber(x,y,hres,vres); /* set pixel index */ |
| 680 |
|
|
| 681 |
|
/* optional motion blur */ |
| 682 |
|
if (lastview.type && mblur > FTINY && (lmax = viewray(lorg, ldir, |
| 683 |
|
&lastview, hpos, vpos)) >= -FTINY) { |
| 680 |
– |
register int i; |
| 684 |
|
register double d = mblur*(.5-urand(281+samplendx)); |
| 685 |
|
|
| 686 |
|
thisray.rmax = (1.-d)*thisray.rmax + d*lmax; |
| 690 |
|
} |
| 691 |
|
if (normalize(thisray.rdir) == 0.0) |
| 692 |
|
return(0.0); |
| 693 |
+ |
vdist = (1.-d)*vdist + d*lastview.vdist; |
| 694 |
|
} |
| 695 |
+ |
/* optional depth-of-field */ |
| 696 |
+ |
if (dblur > FTINY && vdist > FTINY) { |
| 697 |
+ |
double vc, df[2]; |
| 698 |
+ |
df[0] = PI/4.*dblur*(.5 - frandom())/sqrt(ourview.hn2); |
| 699 |
+ |
df[1] = PI/4.*dblur*(.5 - frandom())/sqrt(ourview.vn2); |
| 700 |
+ |
for (i = 3; i--; ) { |
| 701 |
+ |
vc = thisray.rorg[i] + vdist*thisray.rdir[i]; |
| 702 |
+ |
thisray.rorg[i] += df[0]*ourview.hvec[i] + |
| 703 |
+ |
df[1]*ourview.vvec[i] ; |
| 704 |
+ |
thisray.rdir[i] = vc - thisray.rorg[i]; |
| 705 |
+ |
} |
| 706 |
+ |
if (normalize(thisray.rdir) == 0.0) |
| 707 |
+ |
return(0.0); |
| 708 |
+ |
} |
| 709 |
|
|
| 710 |
|
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
| 711 |
|
|
| 776 |
|
error(SYSTEM, errmsg); |
| 777 |
|
return -1; /* pro forma return */ |
| 778 |
|
} |
| 761 |
– |
|
| 779 |
|
|
| 780 |
|
static int |
| 781 |
|
pixnumber( /* compute pixel index (brushed) */ |