| 51 |
|
if (o->oargs.nfargs < 9 || o->oargs.nfargs % 3) |
| 52 |
|
objerror(o, USER, "bad # arguments"); |
| 53 |
|
|
| 54 |
+ |
o->os = (char *)f; /* save face */ |
| 55 |
+ |
|
| 56 |
|
f->va = o->oargs.farg; |
| 57 |
|
f->nv = o->oargs.nfargs / 3; |
| 58 |
|
/* compute area and normal */ |
| 71 |
|
f->area = normalize(f->norm); |
| 72 |
|
if (f->area == 0.0) { |
| 73 |
|
objerror(o, WARNING, "zero area"); /* used to be fatal */ |
| 74 |
< |
f->const = 0.0; |
| 74 |
> |
f->offset = 0.0; |
| 75 |
|
f->ax = 0; |
| 76 |
|
return(f); |
| 77 |
|
} |
| 78 |
|
f->area *= 0.5; |
| 79 |
< |
/* compute constant */ |
| 79 |
> |
/* compute offset */ |
| 80 |
|
badvert = 0; |
| 81 |
< |
f->const = DOT(f->norm, VERTEX(f,0)); |
| 81 |
> |
f->offset = DOT(f->norm, VERTEX(f,0)); |
| 82 |
|
for (i = 1; i < f->nv; i++) { |
| 83 |
|
d1 = DOT(f->norm, VERTEX(f,i)); |
| 84 |
< |
badvert += fabs(d1 - f->const/i) > VERTEPS; |
| 85 |
< |
f->const += d1; |
| 84 |
> |
badvert += fabs(d1 - f->offset/i) > VERTEPS; |
| 85 |
> |
f->offset += d1; |
| 86 |
|
} |
| 87 |
< |
f->const /= f->nv; |
| 87 |
> |
f->offset /= f->nv; |
| 88 |
|
if (badvert) |
| 89 |
|
objerror(o, WARNING, "non-planar vertex"); |
| 90 |
|
/* find axis */ |
| 92 |
|
if (fabs(f->norm[2]) > fabs(f->norm[f->ax])) |
| 93 |
|
f->ax = 2; |
| 94 |
|
|
| 93 |
– |
(FACE *)o->os = f; /* save face */ |
| 95 |
|
return(f); |
| 96 |
|
} |
| 97 |
|
|
