1 |
|
#ifndef lint |
2 |
< |
static const char RCSid[] = "$Id$"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
|
#endif |
4 |
|
/* |
5 |
|
* o_instance.c - routines for computing ray intersections with octrees. |
8 |
|
#include "copyright.h" |
9 |
|
|
10 |
|
#include "ray.h" |
11 |
– |
|
11 |
|
#include "instance.h" |
12 |
+ |
#include "rtotypes.h" |
13 |
|
|
14 |
|
|
15 |
< |
o_instance(o, r) /* compute ray intersection with octree */ |
16 |
< |
OBJREC *o; |
17 |
< |
register RAY *r; |
15 |
> |
int |
16 |
> |
o_instance( /* compute ray intersection with octree */ |
17 |
> |
OBJREC *o, |
18 |
> |
RAY *r |
19 |
> |
) |
20 |
|
{ |
21 |
|
RAY rcont; |
22 |
< |
register INSTANCE *in; |
23 |
< |
register int i; |
22 |
> |
double d; |
23 |
> |
INSTANCE *ins; |
24 |
> |
int i; |
25 |
|
/* get the octree */ |
26 |
< |
in = getinstance(o, IO_ALL); |
26 |
> |
ins = getinstance(o, IO_ALL); |
27 |
|
/* copy and transform ray */ |
28 |
< |
copystruct(&rcont, r); |
29 |
< |
multp3(rcont.rorg, r->rorg, in->x.b.xfm); |
30 |
< |
multv3(rcont.rdir, r->rdir, in->x.b.xfm); |
28 |
> |
rcont = *r; |
29 |
> |
multp3(rcont.rorg, r->rorg, ins->x.b.xfm); |
30 |
> |
multv3(rcont.rdir, r->rdir, ins->x.b.xfm); |
31 |
|
for (i = 0; i < 3; i++) |
32 |
< |
rcont.rdir[i] /= in->x.b.sca; |
33 |
< |
rcont.rmax *= in->x.b.sca; |
32 |
> |
rcont.rdir[i] /= ins->x.b.sca; |
33 |
> |
rcont.rmax *= ins->x.b.sca; |
34 |
|
/* clear and trace it */ |
35 |
|
rayclear(&rcont); |
36 |
< |
if (!localhit(&rcont, &in->obj->scube)) |
36 |
> |
if (!localhit(&rcont, &ins->obj->scube)) |
37 |
|
return(0); /* missed */ |
38 |
< |
if (rcont.rot * in->x.f.sca >= r->rot) |
38 |
> |
if (rcont.rot * ins->x.f.sca >= r->rot) |
39 |
|
return(0); /* not close enough */ |
40 |
|
|
41 |
|
if (o->omod != OVOID) { /* if we have modifier, use it */ |
46 |
|
if (rcont.rox != NULL) { |
47 |
|
newrayxf(r); /* allocate transformation */ |
48 |
|
/* NOTE: r->rox may equal rcont.rox! */ |
49 |
< |
multmat4(r->rox->f.xfm, rcont.rox->f.xfm, in->x.f.xfm); |
50 |
< |
r->rox->f.sca = rcont.rox->f.sca * in->x.f.sca; |
51 |
< |
multmat4(r->rox->b.xfm, in->x.b.xfm, rcont.rox->b.xfm); |
52 |
< |
r->rox->b.sca = in->x.b.sca * rcont.rox->b.sca; |
49 |
> |
multmat4(r->rox->f.xfm, rcont.rox->f.xfm, ins->x.f.xfm); |
50 |
> |
r->rox->f.sca = rcont.rox->f.sca * ins->x.f.sca; |
51 |
> |
multmat4(r->rox->b.xfm, ins->x.b.xfm, rcont.rox->b.xfm); |
52 |
> |
r->rox->b.sca = ins->x.b.sca * rcont.rox->b.sca; |
53 |
|
} else |
54 |
< |
r->rox = &in->x; |
54 |
> |
r->rox = &ins->x; |
55 |
|
} |
56 |
|
/* transform it back */ |
57 |
< |
r->rot = rcont.rot * in->x.f.sca; |
58 |
< |
multp3(r->rop, rcont.rop, in->x.f.xfm); |
59 |
< |
multv3(r->ron, rcont.ron, in->x.f.xfm); |
60 |
< |
for (i = 0; i < 3; i++) |
61 |
< |
r->ron[i] /= in->x.f.sca; |
57 |
> |
r->rot = rcont.rot * ins->x.f.sca; |
58 |
> |
multp3(r->rop, rcont.rop, ins->x.f.xfm); |
59 |
> |
multv3(r->ron, rcont.ron, ins->x.f.xfm); |
60 |
> |
multv3(r->pert, rcont.pert, ins->x.f.xfm); |
61 |
> |
d = 1./ins->x.f.sca; |
62 |
> |
for (i = 0; i < 3; i++) { |
63 |
> |
r->ron[i] *= d; |
64 |
> |
r->pert[i] *= d; |
65 |
> |
} |
66 |
|
r->rod = rcont.rod; |
67 |
+ |
r->uv[0] = rcont.uv[0]; |
68 |
+ |
r->uv[1] = rcont.uv[1]; |
69 |
|
/* return hit */ |
70 |
|
return(1); |
71 |
|
} |