| 141 |
|
fputresolu(YMAJOR|YDECR, hresolu, vresolu, stdout); |
| 142 |
|
/* recover file and compute first */ |
| 143 |
|
i = salvage(oldfile); |
| 144 |
< |
if (zfd != -1 && lseek(zfd, (long)i*hresolu*sizeof(float), 0) == -1) |
| 144 |
> |
if (zfd != -1 && i > 0 && |
| 145 |
> |
lseek(zfd, (long)i*hresolu*sizeof(float), 0) == -1) |
| 146 |
|
error(SYSTEM, "z file seek error in render"); |
| 147 |
|
ypos = vresolu-1 - i; |
| 148 |
|
fillscanline(scanbar[0], zbar[0], hresolu, ypos, psample); |
| 321 |
|
{ |
| 322 |
|
static RAY thisray; /* our ray for this pixel */ |
| 323 |
|
|
| 324 |
< |
viewray(thisray.rorg, thisray.rdir, &ourview, |
| 325 |
< |
(x+pixjitter())/hresolu, (y+pixjitter())/vresolu); |
| 324 |
> |
if (viewray(thisray.rorg, thisray.rdir, &ourview, |
| 325 |
> |
(x+pixjitter())/hresolu, (y+pixjitter())/vresolu) < 0) { |
| 326 |
> |
setcolor(col, 0.0, 0.0, 0.0); |
| 327 |
> |
return(0.0); |
| 328 |
> |
} |
| 329 |
|
|
| 330 |
|
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
| 331 |
|
|
