| 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 109 /* length of mesh edge cache */ |
| 32 |
> |
#define EDGE_CACHE_SIZ 251 /* length of mesh edge cache */ |
| 33 |
|
|
| 34 |
|
#define curmi (edge_cache.mi) |
| 35 |
|
#define curmsh (curmi->msh) |
| 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; |
| 63 |
> |
int32 v1, v2; |
| 64 |
|
{ |
| 65 |
|
int reversed = 0; |
| 66 |
|
register 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) % EDGE_CACHE_SIZ]; |
| 72 |
> |
ecp = &edge_cache.cache[((v2<<11 ^ v1) & 0x7fffffff) % EDGE_CACHE_SIZ]; |
| 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) || |
| 78 |
< |
!getmeshvert(&tv2, edge_cache.mi->msh, v2, 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 signed_volume"); |
| 81 |
> |
VSUB(v2d, tv2.v, r->rorg); |
| 82 |
|
vol = (tv1.v[0] - r->rorg[0]) * |
| 83 |
< |
( (tv2.v[1] - r->rorg[1])*r->rdir[2] - |
| 81 |
< |
(tv2.v[2] - r->rorg[2])*r->rdir[1] ); |
| 83 |
> |
(v2d[1]*r->rdir[2] - v2d[2]*r->rdir[1]); |
| 84 |
|
vol += (tv1.v[1] - r->rorg[1]) * |
| 85 |
< |
( (tv2.v[2] - r->rorg[2])*r->rdir[0] - |
| 84 |
< |
(tv2.v[0] - r->rorg[0])*r->rdir[2] ); |
| 85 |
> |
(v2d[2]*r->rdir[0] - v2d[0]*r->rdir[2]); |
| 86 |
|
vol += (tv1.v[2] - r->rorg[2]) * |
| 87 |
< |
( (tv2.v[0] - r->rorg[0])*r->rdir[1] - |
| 87 |
< |
(tv2.v[1] - r->rorg[1])*r->rdir[0] ); |
| 87 |
> |
(v2d[0]*r->rdir[1] - v2d[1]*r->rdir[0]); |
| 88 |
|
if (vol > .0) |
| 89 |
|
ecp->signum = 1; |
| 90 |
|
else if (vol < .0) |
| 103 |
|
OBJECT *oset; |
| 104 |
|
RAY *r; |
| 105 |
|
{ |
| 106 |
< |
int4 tvi[3]; |
| 106 |
> |
int32 tvi[3]; |
| 107 |
|
int sv1, sv2, sv3; |
| 108 |
|
MESHVERT tv[3]; |
| 109 |
+ |
OBJECT tmod; |
| 110 |
|
FVECT va, vb, nrm; |
| 111 |
|
double d; |
| 112 |
|
int i; |
| 113 |
|
/* check each triangle */ |
| 114 |
|
for (i = oset[0]; i > 0; i--) { |
| 115 |
< |
if (!getmeshtrivid(tvi, curmsh, oset[i])) |
| 115 |
> |
if (!getmeshtrivid(tvi, &tmod, curmsh, oset[i])) |
| 116 |
|
objerror(edge_cache.o, INTERNAL, |
| 117 |
< |
"missing triangle vertices in mesh_hit"); |
| 117 |
> |
"missing triangle vertices in mesh_hit"); |
| 118 |
|
sv1 = signed_volume(r, tvi[0], tvi[1]); |
| 119 |
|
sv2 = signed_volume(r, tvi[1], tvi[2]); |
| 120 |
|
sv3 = signed_volume(r, tvi[2], tvi[0]); |
| 140 |
|
r->rot = d; |
| 141 |
|
VSUM(r->rop, r->rorg, r->rdir, d); |
| 142 |
|
VCOPY(r->ron, nrm); |
| 143 |
< |
/* normalize(r->ron) called in o_mesh() & rod set */ |
| 143 |
> |
/* normalize(r->ron) called & r->rod set in o_mesh() */ |
| 144 |
|
} |
| 145 |
|
} |
| 146 |
|
|
| 147 |
|
|
| 148 |
< |
int |
| 149 |
< |
o_mesh(o, r) /* compute ray intersection with a mesh */ |
| 150 |
< |
OBJREC *o; |
| 151 |
< |
register RAY *r; |
| 148 |
> |
extern int |
| 149 |
> |
o_mesh( /* compute ray intersection with a mesh */ |
| 150 |
> |
OBJREC *o, |
| 151 |
> |
register RAY *r |
| 152 |
> |
) |
| 153 |
|
{ |
| 154 |
|
RAY rcont; |
| 155 |
|
int flags; |
| 156 |
|
MESHVERT tv[3]; |
| 157 |
< |
FLOAT wt[3]; |
| 157 |
> |
OBJECT tmod; |
| 158 |
> |
RREAL wt[3]; |
| 159 |
|
int i; |
| 160 |
|
/* get the mesh instance */ |
| 161 |
|
prep_edge_cache(o); |
| 162 |
|
/* copy and transform ray */ |
| 163 |
< |
copystruct(&rcont, r); |
| 163 |
> |
rcont = *r; |
| 164 |
|
multp3(rcont.rorg, r->rorg, curmi->x.b.xfm); |
| 165 |
|
multv3(rcont.rdir, r->rdir, curmi->x.b.xfm); |
| 166 |
|
for (i = 0; i < 3; i++) |
| 173 |
|
return(0); /* missed */ |
| 174 |
|
if (rcont.rot * curmi->x.f.sca >= r->rot) |
| 175 |
|
return(0); /* not close enough */ |
| 173 |
– |
|
| 174 |
– |
r->robj = objndx(o); /* record new hit */ |
| 175 |
– |
r->ro = o; |
| 176 |
|
/* transform ray back */ |
| 177 |
|
r->rot = rcont.rot * curmi->x.f.sca; |
| 178 |
|
multp3(r->rop, rcont.rop, curmi->x.f.xfm); |
| 179 |
|
multv3(r->ron, rcont.ron, curmi->x.f.xfm); |
| 180 |
|
normalize(r->ron); |
| 181 |
|
r->rod = -DOT(r->rdir, r->ron); |
| 182 |
< |
/* compute barycentric weights */ |
| 183 |
< |
flags = getmeshtri(tv, curmsh, rcont.robj, MT_ALL); |
| 182 |
> |
/* get triangle */ |
| 183 |
> |
flags = getmeshtri(tv, &tmod, curmsh, rcont.robj, MT_ALL); |
| 184 |
|
if (!(flags & MT_V)) |
| 185 |
|
objerror(o, INTERNAL, "missing mesh vertices in o_mesh"); |
| 186 |
+ |
r->robj = objndx(o); /* set object and material */ |
| 187 |
+ |
if (o->omod == OVOID && tmod != OVOID) { |
| 188 |
+ |
r->ro = getmeshpseudo(curmsh, tmod); |
| 189 |
+ |
r->rox = &curmi->x; |
| 190 |
+ |
} else |
| 191 |
+ |
r->ro = o; |
| 192 |
+ |
/* compute barycentric weights */ |
| 193 |
|
if (flags & (MT_N|MT_UV)) |
| 194 |
|
if (get_baryc(wt, rcont.rop, tv[0].v, tv[1].v, tv[2].v) < 0) { |
| 195 |
|
objerror(o, WARNING, "bad triangle in o_mesh"); |
| 204 |
|
if (normalize(r->pert) != 0.0) |
| 205 |
|
for (i = 0; i < 3; i++) |
| 206 |
|
r->pert[i] -= r->ron[i]; |
| 207 |
< |
} |
| 207 |
> |
} else |
| 208 |
> |
r->pert[0] = r->pert[1] = r->pert[2] = .0; |
| 209 |
> |
|
| 210 |
|
if (flags & MT_UV) /* interpolate uv coordinates */ |
| 211 |
|
for (i = 0; i < 2; i++) |
| 212 |
|
r->uv[i] = wt[0]*tv[0].uv[i] + |
| 213 |
|
wt[1]*tv[1].uv[i] + |
| 214 |
|
wt[2]*tv[2].uv[i]; |
| 215 |
+ |
else |
| 216 |
+ |
r->uv[0] = r->uv[1] = .0; |
| 217 |
|
|
| 218 |
|
/* return hit */ |
| 219 |
|
return(1); |
