| 245 |
|
break; |
| 246 |
|
case VT_PER: /* perspective view */ |
| 247 |
|
d = DOT(disp,v->vdir); |
| 248 |
< |
if ((v->vaft > FTINY) & (d > v->vaft)) |
| 248 |
> |
if ((v->vaft > FTINY) & (d >= v->vaft)) |
| 249 |
|
rflags |= VL_BEYOND; |
| 250 |
|
ip[2] = VLEN(disp); |
| 251 |
|
if (d < -FTINY) { /* fold pyramid */ |
| 275 |
|
d = d*d + d2*d2; |
| 276 |
|
if (d <= FTINY*FTINY) |
| 277 |
|
return(VL_BAD); /* at pole */ |
| 278 |
< |
if ((v->vaft > FTINY) & (d > v->vaft*v->vaft)) |
| 278 |
> |
if ((v->vaft > FTINY) & (d >= v->vaft*v->vaft)) |
| 279 |
|
rflags |= VL_BEYOND; |
| 280 |
|
d = 1.0/sqrt(d); |
| 281 |
|
ip[1] = DOT(disp,v->vvec)*d/v->vn2 + 0.5 - v->voff; |
| 315 |
|
ip[0] = DOT(disp,v->hvec)/v->hn2 + 0.5 - v->hoff; |
| 316 |
|
ip[1] = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
| 317 |
|
gotall: /* add appropriate return flags */ |
| 318 |
< |
rflags |= VL_BEHIND*(ip[2] <= 0.0); |
| 318 |
> |
if (!(rflags & (VL_BEHIND|VL_BEYOND))) |
| 319 |
> |
rflags |= (ip[2] <= 0.0) ? VL_BEHIND : |
| 320 |
> |
VL_BEYOND * ((v->vaft > FTINY) & |
| 321 |
> |
(ip[2] >= v->vaft - v->vfore)); |
| 322 |
|
rflags |= VL_OUTSIDE*((0.0 >= ip[0]) | (ip[0] >= 1.0) | |
| 323 |
|
(0.0 >= ip[1]) | (ip[1] >= 1.0)); |
| 321 |
– |
if ((v->vaft > FTINY) & !(rflags & (VL_BEHIND|VL_BEYOND))) |
| 322 |
– |
rflags |= VL_BEYOND*(ip[2] > v->vaft - v->vfore); |
| 324 |
|
return(rflags); |
| 325 |
|
} |
| 326 |
|
|
