| 80 |
|
return(0); /* outside radii */ |
| 81 |
|
r->ro = o; |
| 82 |
|
r->rot = root[0]; |
| 83 |
< |
for (i = 0; i < 3; i++) |
| 84 |
< |
r->rop[i] = r->rorg[i] + r->rdir[i]*r->rot; |
| 83 |
> |
VSUM(r->rop, r->rorg, r->rdir, r->rot); |
| 84 |
|
VCOPY(r->ron, co->ad); |
| 85 |
|
r->rod = -rdx[2]; |
| 86 |
|
r->rox = NULL; |
| 95 |
|
if (root[rn] >= r->rot) |
| 96 |
|
break; /* too big */ |
| 97 |
|
/* check endpoints */ |
| 98 |
< |
for (i = 0; i < 3; i++) { |
| 99 |
< |
rox[i] = r->rorg[i] + root[rn]*r->rdir[i]; |
| 101 |
< |
rdx[i] = rox[i] - CO_P0(co)[i]; |
| 102 |
< |
} |
| 98 |
> |
VSUM(rox, r->rorg, r->rdir, root[rn]); |
| 99 |
> |
VSUB(rdx, rox, CO_P0(co)); |
| 100 |
|
b = DOT(rdx, co->ad); |
| 101 |
|
if (b < 0.0) |
| 102 |
|
continue; /* before p0 */ |
| 123 |
|
if (o->otype == OBJ_CONE || o->otype == OBJ_CUP) |
| 124 |
|
for (i = 0; i < 3; i++) |
| 125 |
|
r->ron[i] = (co->al*r->ron[i] - c*co->ad[i]) |
| 126 |
< |
/co->sl; |
| 126 |
> |
/ co->sl; |
| 127 |
> |
a = DOT(r->ron, r->ron); |
| 128 |
> |
if (a > 1.+FTINY || a < 1.-FTINY) { |
| 129 |
> |
c = 1./(.5 + .5*a); /* avoid numerical error */ |
| 130 |
> |
r->ron[0] *= c; r->ron[1] *= c; r->ron[2] *= c; |
| 131 |
> |
} |
| 132 |
|
r->rod = -DOT(r->rdir, r->ron); |
| 133 |
|
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
| 134 |
|
r->uv[0] = r->uv[1] = 0.0; |
