| 8 |
|
#include "copyright.h" |
| 9 |
|
|
| 10 |
|
#include "ray.h" |
| 11 |
– |
|
| 11 |
|
#include "face.h" |
| 12 |
+ |
#include "rtotypes.h" |
| 13 |
|
|
| 14 |
|
|
| 15 |
< |
o_face(o, r) /* compute intersection with polygonal face */ |
| 16 |
< |
OBJREC *o; |
| 17 |
< |
register RAY *r; |
| 15 |
> |
extern int |
| 16 |
> |
o_face( /* compute intersection with polygonal face */ |
| 17 |
> |
OBJREC *o, |
| 18 |
> |
register RAY *r |
| 19 |
> |
) |
| 20 |
|
{ |
| 21 |
|
double rdot; /* direction . normal */ |
| 22 |
|
double t; /* distance to intersection */ |
| 23 |
|
FVECT pisect; /* intersection point */ |
| 24 |
|
register FACE *f; /* face record */ |
| 23 |
– |
register int i; |
| 25 |
|
|
| 26 |
|
f = getface(o); |
| 27 |
|
|
| 44 |
|
if (t <= FTINY || t >= r->rot) /* not good enough */ |
| 45 |
|
return(0); |
| 46 |
|
/* compute intersection */ |
| 47 |
< |
for (i = 0; i < 3; i++) |
| 47 |
< |
pisect[i] = r->rorg[i] + r->rdir[i]*t; |
| 47 |
> |
VSUM(pisect, r->rorg, r->rdir, t); |
| 48 |
|
|
| 49 |
|
if (!inface(pisect, f)) /* ray intersects face? */ |
| 50 |
|
return(0); |
