| 59 |
|
|
| 60 |
|
static int |
| 61 |
|
volume_sign(r, v1, v2) /* get signed volume for ray and edge */ |
| 62 |
< |
register RAY *r; |
| 62 |
> |
RAY *r; |
| 63 |
|
int32 v1, v2; |
| 64 |
|
{ |
| 65 |
< |
int reversed = 0; |
| 66 |
< |
register struct EdgeSide *ecp; |
| 65 |
> |
int reversed = 0; |
| 66 |
> |
struct EdgeSide *ecp; |
| 67 |
|
|
| 68 |
|
if (v1 > v2) { |
| 69 |
|
int32 t = v2; v2 = v1; v1 = t; |
| 113 |
|
"missing triangle vertices in mesh_hit"); |
| 114 |
|
sv1 = volume_sign(r, tvi[0], tvi[1]); |
| 115 |
|
sv2 = volume_sign(r, tvi[1], tvi[2]); |
| 116 |
+ |
if (sv1 != sv2) /* compare volume signs */ |
| 117 |
+ |
continue; |
| 118 |
|
sv3 = volume_sign(r, tvi[2], tvi[0]); |
| 119 |
< |
/* compare volume signs */ |
| 118 |
< |
if ((sv1 != sv2) | (sv2 != sv3)) |
| 119 |
> |
if (sv2 != sv3) |
| 120 |
|
continue; |
| 121 |
|
/* compute intersection */ |
| 122 |
|
getmeshvert(&tv[0], curmsh, tvi[0], MT_V); |
| 142 |
|
} |
| 143 |
|
|
| 144 |
|
|
| 145 |
< |
extern int |
| 145 |
> |
int |
| 146 |
|
o_mesh( /* compute ray intersection with a mesh */ |
| 147 |
|
OBJREC *o, |
| 148 |
< |
register RAY *r |
| 148 |
> |
RAY *r |
| 149 |
|
) |
| 150 |
|
{ |
| 151 |
|
RAY rcont; |
| 199 |
|
wt[2]*tv[2].n[i]; |
| 200 |
|
multv3(r->pert, rcont.pert, curmi->x.f.xfm); |
| 201 |
|
if (normalize(r->pert) != 0.0) |
| 202 |
< |
for (i = 0; i < 3; i++) |
| 202 |
< |
r->pert[i] -= r->ron[i]; |
| 202 |
> |
VSUB(r->pert, r->pert, r->ron); |
| 203 |
|
} else |
| 204 |
|
r->pert[0] = r->pert[1] = r->pert[2] = .0; |
| 205 |
|
|
