| 24 |
|
) |
| 25 |
|
{ |
| 26 |
|
RREAL df[2]; |
| 27 |
< |
double vc; |
| 27 |
> |
double adj; |
| 28 |
|
int i; |
| 29 |
|
/* are we even needed? */ |
| 30 |
|
if (dia <= FTINY) |
| 33 |
|
square2disk(df, frandom(), frandom()); |
| 34 |
|
df[0] *= .5*dia; |
| 35 |
|
df[1] *= .5*dia; |
| 36 |
+ |
|
| 37 |
|
if ((v->type == VT_PER) | (v->type == VT_PAR)) { |
| 38 |
< |
double adj = 1.0; /* basic view cases */ |
| 38 |
> |
adj = 1.0; /* basic view cases */ |
| 39 |
|
if (v->type == VT_PER) |
| 40 |
|
adj /= DOT(direc, v->vdir); |
| 41 |
|
df[0] /= sqrt(v->hn2); |
| 42 |
|
df[1] /= sqrt(v->vn2); |
| 43 |
|
for (i = 3; i--; ) { |
| 44 |
< |
vc = v->vp[i] + adj*v->vdist*direc[i]; |
| 44 |
< |
orig[i] += df[0]*v->hvec[i] + |
| 44 |
> |
orig[i] = v->vp[i] + df[0]*v->hvec[i] + |
| 45 |
|
df[1]*v->vvec[i] ; |
| 46 |
< |
direc[i] = vc - orig[i]; |
| 46 |
> |
direc[i] = v->vp[i] + adj*v->vdist*direc[i] |
| 47 |
> |
- orig[i]; |
| 48 |
|
} |
| 49 |
|
} else { /* difficult view cases */ |
| 50 |
< |
double dfd = PI/4.*dia*(.5 - frandom()); |
| 50 |
> |
adj = PI/4.*dia*(.5 - frandom()); |
| 51 |
|
if ((v->type != VT_ANG) & (v->type != VT_PLS)) { |
| 52 |
|
if (v->type != VT_CYL) |
| 53 |
|
df[0] /= sqrt(v->hn2); |
| 54 |
|
df[1] /= sqrt(v->vn2); |
| 55 |
|
} |
| 56 |
|
for (i = 3; i--; ) { |
| 57 |
< |
vc = v->vp[i] + v->vdist*direc[i]; |
| 57 |
< |
orig[i] += df[0]*v->hvec[i] + |
| 57 |
> |
orig[i] = v->vp[i] + df[0]*v->hvec[i] + |
| 58 |
|
df[1]*v->vvec[i] + |
| 59 |
< |
dfd*v->vdir[i] ; |
| 60 |
< |
direc[i] = vc - orig[i]; |
| 59 |
> |
adj*v->vdir[i] ; |
| 60 |
> |
direc[i] = v->vp[i] + v->vdist*direc[i] |
| 61 |
> |
- orig[i]; |
| 62 |
|
} |
| 63 |
|
} |
| 64 |
< |
return(normalize(direc) != 0.0); |
| 64 |
> |
if (normalize(direc) == 0.0) |
| 65 |
> |
return(0); |
| 66 |
> |
if ((adj = v->vfore) <= FTINY) |
| 67 |
> |
return(1); |
| 68 |
> |
if (v->type == VT_PER) |
| 69 |
> |
adj /= DOT(direc, v->vdir); |
| 70 |
> |
VSUM(orig, orig, direc, adj); |
| 71 |
> |
return(1); |
| 72 |
|
} |
