| 290 |
|
FVECT vd; |
| 291 |
|
int x, y; |
| 292 |
|
{ |
| 293 |
+ |
static int cury = 10000; |
| 294 |
+ |
static double err, cmpval; |
| 295 |
+ |
long t; |
| 296 |
|
FVECT org; /* dummy variable */ |
| 297 |
|
|
| 298 |
|
if (x <= -hlim) /* left region */ |
| 303 |
|
return(viewray(org, vd, &rightview, |
| 304 |
|
(double)(x-hlim)/(2*sampdens)+.5, |
| 305 |
|
(double)y/(2*sampdens)+.5)); |
| 306 |
< |
/* central region */ |
| 306 |
> |
/* central region */ |
| 307 |
> |
/* avoid over-counting of poles */ |
| 308 |
> |
if (cury != y) { |
| 309 |
> |
err = 0.0; |
| 310 |
> |
cmpval = sqrt(1.0 - (double)((long)y*y)/((long)vsize*vsize)); |
| 311 |
> |
cury = y; |
| 312 |
> |
} |
| 313 |
> |
err += cmpval; |
| 314 |
> |
if (err <= 0.5) |
| 315 |
> |
return(-1); |
| 316 |
> |
err -= 1.0; |
| 317 |
|
if (viewray(org, vd, &ourview, .5, (double)y/(2*sampdens)+.5) < 0) |
| 318 |
|
return(-1); |
| 319 |
|
spinvector(vd, vd, ourview.vup, h_theta(x)); |
