21 |
|
|
22 |
|
#include "copyright.h" |
23 |
|
|
24 |
< |
#include "ray.h" |
24 |
> |
#include <string.h> |
25 |
|
|
26 |
+ |
#include "ray.h" |
27 |
|
#include "mesh.h" |
27 |
– |
|
28 |
|
#include "tmesh.h" |
29 |
+ |
#include "rtotypes.h" |
30 |
|
|
31 |
|
|
32 |
|
#define EDGE_CACHE_SIZ 251 /* length of mesh edge cache */ |
40 |
|
OBJREC *o; /* mesh object */ |
41 |
|
MESHINST *mi; /* current mesh instance */ |
42 |
|
struct EdgeSide { |
43 |
< |
int4 v1i, v2i; /* vertex indices (lowest first) */ |
43 |
> |
int32 v1i, v2i; /* vertex indices (lowest first) */ |
44 |
|
short signum; /* signed volume */ |
45 |
|
} cache[EDGE_CACHE_SIZ]; |
46 |
|
} edge_cache; |
53 |
|
/* get mesh instance */ |
54 |
|
edge_cache.mi = getmeshinst(edge_cache.o = o, IO_ALL); |
55 |
|
/* clear edge cache */ |
56 |
< |
bzero((void *)edge_cache.cache, sizeof(edge_cache.cache)); |
56 |
> |
memset((void *)edge_cache.cache, '\0', sizeof(edge_cache.cache)); |
57 |
|
} |
58 |
|
|
59 |
|
|
60 |
|
static int |
61 |
< |
signed_volume(r, v1, v2) /* get signed volume for ray and edge */ |
62 |
< |
register RAY *r; |
63 |
< |
int4 v1, v2; |
61 |
> |
volume_sign(r, v1, v2) /* get signed volume for ray and edge */ |
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 |
< |
int4 t = v2; v2 = v1; v1 = t; |
69 |
> |
int32 t = v2; v2 = v1; v1 = t; |
70 |
|
reversed = 1; |
71 |
|
} |
72 |
|
ecp = &edge_cache.cache[((v2<<11 ^ v1) & 0x7fffffff) % EDGE_CACHE_SIZ]; |
73 |
< |
if (ecp->v1i != v1 || ecp->v2i != v2) { |
73 |
> |
if ((ecp->v1i != v1) | (ecp->v2i != v2)) { |
74 |
|
MESHVERT tv1, tv2; /* compute signed volume */ |
75 |
|
FVECT v2d; |
76 |
|
double vol; |
77 |
< |
if (!getmeshvert(&tv1, edge_cache.mi->msh, v1, MT_V) || |
77 |
> |
if (!getmeshvert(&tv1, edge_cache.mi->msh, v1, MT_V) | |
78 |
|
!getmeshvert(&tv2, edge_cache.mi->msh, v2, MT_V)) |
79 |
|
objerror(edge_cache.o, INTERNAL, |
80 |
< |
"missing mesh vertex in signed_volume"); |
80 |
> |
"missing mesh vertex in volume_sign"); |
81 |
|
VSUB(v2d, tv2.v, r->rorg); |
82 |
|
vol = (tv1.v[0] - r->rorg[0]) * |
83 |
|
(v2d[1]*r->rdir[2] - v2d[2]*r->rdir[1]); |
85 |
|
(v2d[2]*r->rdir[0] - v2d[0]*r->rdir[2]); |
86 |
|
vol += (tv1.v[2] - r->rorg[2]) * |
87 |
|
(v2d[0]*r->rdir[1] - v2d[1]*r->rdir[0]); |
88 |
< |
if (vol > .0) |
89 |
< |
ecp->signum = 1; |
89 |
< |
else if (vol < .0) |
90 |
< |
ecp->signum = -1; |
91 |
< |
else |
92 |
< |
ecp->signum = 0; |
88 |
> |
/* don't generate 0 */ |
89 |
> |
ecp->signum = vol > .0 ? 1 : -1; |
90 |
|
ecp->v1i = v1; |
91 |
|
ecp->v2i = v2; |
92 |
|
} |
99 |
|
OBJECT *oset; |
100 |
|
RAY *r; |
101 |
|
{ |
102 |
< |
int4 tvi[3]; |
102 |
> |
int32 tvi[3]; |
103 |
|
int sv1, sv2, sv3; |
104 |
|
MESHVERT tv[3]; |
105 |
+ |
OBJECT tmod; |
106 |
|
FVECT va, vb, nrm; |
107 |
|
double d; |
108 |
|
int i; |
109 |
|
/* check each triangle */ |
110 |
|
for (i = oset[0]; i > 0; i--) { |
111 |
< |
if (!getmeshtrivid(tvi, curmsh, oset[i])) |
111 |
> |
if (!getmeshtrivid(tvi, &tmod, curmsh, oset[i])) |
112 |
|
objerror(edge_cache.o, INTERNAL, |
113 |
|
"missing triangle vertices in mesh_hit"); |
114 |
< |
sv1 = signed_volume(r, tvi[0], tvi[1]); |
115 |
< |
sv2 = signed_volume(r, tvi[1], tvi[2]); |
116 |
< |
sv3 = signed_volume(r, tvi[2], tvi[0]); |
117 |
< |
if (sv1 != sv2 || sv2 != sv3) /* compare volume signs */ |
118 |
< |
if (sv1 && sv2 && sv3) |
119 |
< |
continue; |
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 |
> |
if (sv2 != sv3) |
120 |
> |
continue; |
121 |
|
/* compute intersection */ |
122 |
|
getmeshvert(&tv[0], curmsh, tvi[0], MT_V); |
123 |
|
getmeshvert(&tv[1], curmsh, tvi[1], MT_V); |
130 |
|
continue; /* ray is tangent */ |
131 |
|
VSUB(va, tv[0].v, r->rorg); |
132 |
|
d = DOT(va, nrm) / d; |
133 |
< |
if (d <= FTINY || d >= r->rot) |
133 |
> |
if ((d <= FTINY) | (d >= r->rot)) |
134 |
|
continue; /* not good enough */ |
135 |
|
r->robj = oset[i]; /* else record hit */ |
136 |
|
r->ro = edge_cache.o; |
143 |
|
|
144 |
|
|
145 |
|
int |
146 |
< |
o_mesh(o, r) /* compute ray intersection with a mesh */ |
147 |
< |
OBJREC *o; |
148 |
< |
register RAY *r; |
146 |
> |
o_mesh( /* compute ray intersection with a mesh */ |
147 |
> |
OBJREC *o, |
148 |
> |
RAY *r |
149 |
> |
) |
150 |
|
{ |
151 |
|
RAY rcont; |
152 |
|
int flags; |
153 |
|
MESHVERT tv[3]; |
154 |
< |
FLOAT wt[3]; |
154 |
> |
OBJECT tmod; |
155 |
> |
RREAL wt[3]; |
156 |
|
int i; |
157 |
|
/* get the mesh instance */ |
158 |
|
prep_edge_cache(o); |
159 |
|
/* copy and transform ray */ |
160 |
< |
copystruct(&rcont, r); |
160 |
> |
rcont = *r; |
161 |
|
multp3(rcont.rorg, r->rorg, curmi->x.b.xfm); |
162 |
|
multv3(rcont.rdir, r->rdir, curmi->x.b.xfm); |
163 |
|
for (i = 0; i < 3; i++) |
170 |
|
return(0); /* missed */ |
171 |
|
if (rcont.rot * curmi->x.f.sca >= r->rot) |
172 |
|
return(0); /* not close enough */ |
172 |
– |
|
173 |
– |
r->robj = objndx(o); /* record new hit */ |
174 |
– |
r->ro = o; |
173 |
|
/* transform ray back */ |
174 |
|
r->rot = rcont.rot * curmi->x.f.sca; |
175 |
|
multp3(r->rop, rcont.rop, curmi->x.f.xfm); |
176 |
|
multv3(r->ron, rcont.ron, curmi->x.f.xfm); |
177 |
|
normalize(r->ron); |
178 |
|
r->rod = -DOT(r->rdir, r->ron); |
179 |
< |
/* compute barycentric weights */ |
180 |
< |
flags = getmeshtri(tv, curmsh, rcont.robj, MT_ALL); |
179 |
> |
/* get triangle */ |
180 |
> |
flags = getmeshtri(tv, &tmod, curmsh, rcont.robj, MT_ALL); |
181 |
|
if (!(flags & MT_V)) |
182 |
|
objerror(o, INTERNAL, "missing mesh vertices in o_mesh"); |
183 |
+ |
r->robj = objndx(o); /* set object and material */ |
184 |
+ |
if ((o->omod == OVOID) & (tmod != OVOID)) { |
185 |
+ |
r->ro = getmeshpseudo(curmsh, tmod); |
186 |
+ |
r->rox = &curmi->x; |
187 |
+ |
} else |
188 |
+ |
r->ro = o; |
189 |
+ |
/* compute barycentric weights */ |
190 |
|
if (flags & (MT_N|MT_UV)) |
191 |
|
if (get_baryc(wt, rcont.rop, tv[0].v, tv[1].v, tv[2].v) < 0) { |
192 |
|
objerror(o, WARNING, "bad triangle in o_mesh"); |
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++) |
198 |
< |
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 |
|
|
210 |
|
wt[2]*tv[2].uv[i]; |
211 |
|
else |
212 |
|
r->uv[0] = r->uv[1] = .0; |
213 |
< |
|
214 |
< |
/* return hit */ |
211 |
< |
return(1); |
213 |
> |
|
214 |
> |
return(1); /* return hit */ |
215 |
|
} |