425 |
|
} |
426 |
|
|
427 |
|
|
428 |
< |
zoomview(vp, zf) /* zoom in our out */ |
428 |
> |
zoomview(vp, zf) /* zoom in or out */ |
429 |
|
register VIEW *vp; |
430 |
|
double zf; |
431 |
|
{ |
432 |
|
switch (vp->type) { |
433 |
|
case VT_PAR: /* parallel view */ |
434 |
+ |
vp->horiz /= zf; |
435 |
+ |
vp->vert /= zf; |
436 |
+ |
return; |
437 |
|
case VT_ANG: /* angular fisheye */ |
438 |
|
vp->horiz /= zf; |
439 |
+ |
if (vp->horiz > 360.) |
440 |
+ |
vp->horiz = 360.; |
441 |
|
vp->vert /= zf; |
442 |
+ |
if (vp->vert > 360.) |
443 |
+ |
vp->vert = 360.; |
444 |
+ |
return; |
445 |
+ |
case VT_CYL: /* cylindrical panorama */ |
446 |
+ |
vp->horiz /= zf; |
447 |
+ |
if (vp->horiz > 360.) |
448 |
+ |
vp->horiz = 360.; |
449 |
+ |
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / (PI/180./2.); |
450 |
|
return; |
451 |
|
case VT_PER: /* perspective view */ |
452 |
|
vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) / |