65 |
|
} |
66 |
|
|
67 |
|
|
68 |
+ |
normaspect(va, ap, xp, yp) /* fix pixel aspect or resolution */ |
69 |
+ |
double va; /* view aspect ratio */ |
70 |
+ |
double *ap; /* pixel aspect in (or out if 0) */ |
71 |
+ |
int *xp, *yp; /* x and y resolution in (or out if *ap!=0) */ |
72 |
+ |
{ |
73 |
+ |
if (*ap <= FTINY) |
74 |
+ |
*ap = va * *xp / *yp; /* compute pixel aspect */ |
75 |
+ |
else if (va * *xp > *ap * *yp) |
76 |
+ |
*xp = *yp / va * *ap; /* reduce x resolution */ |
77 |
+ |
else |
78 |
+ |
*yp = *xp * va / *ap; /* reduce y resolution */ |
79 |
+ |
} |
80 |
+ |
|
81 |
+ |
|
82 |
|
viewray(orig, direc, v, x, y) /* compute ray origin and direction */ |
83 |
|
FVECT orig, direc; |
84 |
|
register VIEW *v; |