inline Bface*
copy_face(Bface* f, CVertMapper& vmap, Primitive* p, bool reverse)
{
assert(f && p && vmap.is_valid());
Bvert* v1 = vmap.a_to_b(f->v1());
Bvert* v2 = vmap.a_to_b(f->v2());
Bvert* v3 = vmap.a_to_b(f->v3());
assert(v1 && v2 && v3);
FaceMeme* fm = nullptr;
UVpt a, b, c;
if (UVdata::get_uvs(f, a, b, c)) {
Panel* r = dynamic_cast<Panel*>(Bsurface::find_controller(f));
assert(r && r->curves().num()==4);
int n = min(r->curves()[0]->num_edges(), r->curves()[1]->num_edges());
if (reverse) {
fm = p->add_face(v1, v3, v2, a, c, b);
} else {
a = UVpt(2+1.0/n-a[0], a[1]);
b = UVpt(2+1.0/n-b[0], b[1]);
c = UVpt(2+1.0/n-c[0], c[1]);
fm = p->add_face(v1, v2, v3, a, b, c);
}
} else {
if (reverse)
fm = p->add_face(v1, v3, v2);
else
fm = p->add_face(v1, v2, v3);
}
return fm ? fm->face() : nullptr;
}
Lface*
Skin::gen_face(Bface* f)
{
if (!f) {
err_adv(debug, "Skin::gen_face: null face");
return 0;
}
Bvert* v1 = _mapper.a_to_b(f->v1());
Bvert* v2 = _mapper.a_to_b(f->v2());
Bvert* v3 = _mapper.a_to_b(f->v3());
FaceMeme* fm = 0;
UVpt a, b, c;
// if the new face exists, the following does not re-create it:
if (UVdata::get_uvs(f, a, b, c)) {
if (_reverse)
fm = add_face(v1, v3, v2, a, c, b);
else
fm = add_face(v1, v2, v3, a, b, c);
} else {
if (_reverse)
fm = add_face(v1, v3, v2);
else
fm = add_face(v1, v2, v3);
}
return fm ? fm->face() : 0;
}