313 |
|
break; |
314 |
|
case VT_PER: /* perspective view */ |
315 |
|
d = DOT(disp,v->vdir); |
316 |
< |
if ((v->vaft > FTINY) & (d >= v->vaft)) |
317 |
< |
rflags |= VL_BEYOND; |
316 |
> |
rflags |= VL_BEYOND*((v->vaft > FTINY) & |
317 |
> |
(d >= v->vaft)); |
318 |
|
ip[2] = VLEN(disp); |
319 |
|
if (d < -FTINY) { /* fold pyramid */ |
320 |
|
ip[2] = -ip[2]; |
343 |
|
d2 = d*d + d2*d2; |
344 |
|
if (d2 <= FTINY*FTINY) |
345 |
|
return(VL_BAD); /* at pole */ |
346 |
< |
if ((v->vaft > FTINY) & (d2 >= v->vaft*v->vaft)) |
347 |
< |
rflags |= VL_BEYOND; |
346 |
> |
rflags |= VL_BEYOND*((v->vaft > FTINY) & |
347 |
> |
(d2 >= v->vaft*v->vaft)); |
348 |
|
d = 1.0/sqrt(d2); |
349 |
|
ip[1] = DOT(disp,v->vvec)*d/v->vn2 + 0.5 - v->voff; |
350 |
|
ip[2] = VLEN(disp); |