virtual UVpt get_attrib(CBvert* v, CBface* f)
{
assert(v&&f);
TexCoordGen* tg = f->patch()->tex_coord_gen();
if (tg)
return tg->uv_from_vert(v,f);
else
if (UVdata::lookup(f))
return UVdata::get_uv(v,f);
else
return UVpt(0.0,0.0);
}
Wvec b() const { return _map->dv(UVpt(0,0)); }
Wvec n() const { return _map->norm(UVpt(0,0)); }
Wvec t() const { return _map->du(UVpt(0,0)); }
Wpt o() const { return _map->map(UVpt(0,0)); }
void
ProxySurface::create_proxy_surface()
{
// create it only if needed
if (_proxy_mesh || !_patch) {
return;
}
_proxy_mesh = new BMESH;
mlib::NDCZpt a_t, c_t;
_patch->mesh()->get_bb().ndcz_bounding_box(_patch->obj_to_ndc(),a_t,c_t);
// Clamp the min and max to screen
a_t[0] = max(a_t[0],-1.0);
a_t[1] = max(a_t[1],-1.0);
c_t[0] = min(c_t[0], 1.0);
c_t[1] = min(c_t[1], 1.0);
BBOXpix bb = BBOXpix(PIXEL(a_t), PIXEL(c_t));
double len = max(bb.width(),bb.height());
PIXEL a_p(a_t);
XYpt a = XYpt(a_p);
XYpt b = XYpt(a_p + VEXEL(len, 0));
XYpt c = XYpt(a_p + VEXEL(len,len));
XYpt d = XYpt(a_p + VEXEL( 0,len));
Wpt cc = VIEW::peek_cam()->data()->center();
// create a quad organized in XY space
// first create vertices (XY square in CCW order):
_proxy_mesh->add_vertex(Wpt(a, cc));
_proxy_mesh->add_vertex(Wpt(b, cc));
_proxy_mesh->add_vertex(Wpt(c, cc));
_proxy_mesh->add_vertex(Wpt(d, cc));
// now create the quad:
Patch* pa = _proxy_mesh->new_patch();
_proxy_mesh->add_quad(0,1,2,3,
UVpt(0,0), UVpt(1,0), UVpt(1,1), UVpt(0,1),
pa);
UVdata::set(_proxy_mesh->bv(0), (UVpt(0,0)));
UVdata::set(_proxy_mesh->bv(1), (UVpt(1,0)));
UVdata::set(_proxy_mesh->bv(2), (UVpt(1,1)));
UVdata::set(_proxy_mesh->bv(3), (UVpt(0,1)));
put_vert_grid(UVpt(0,0), _proxy_mesh->bv(0));
put_vert_grid(UVpt(1,0), _proxy_mesh->bv(1));
put_vert_grid(UVpt(1,1), _proxy_mesh->bv(2));
put_vert_grid(UVpt(0,1), _proxy_mesh->bv(3));
_o = _proxy_mesh->bv(0)->pix();
_u_o = _proxy_mesh->bv(1)->pix();
_v_o = _proxy_mesh->bv(3)->pix();
// grow more quads if needed, though it is never needed (yet):
while (grow_proxy_surface() > 0)
;
// finish up:
_proxy_mesh->changed();
}
// 2
// 3|_|1
// 0
Bface*
ProxySurface::neighbor_face(int dir, Bface* face)
{
UVpt base_uv = baseUVpt(face);
UVpt uv1, uv2, uv3, uv4;
switch (dir)
{
case 0:
uv1 = UVpt(base_uv[0], base_uv[1]);
uv2 = UVpt(base_uv[0]+1, base_uv[1]);
uv3 = UVpt(base_uv[0], base_uv[1]-1);
uv4 = UVpt(base_uv[0]+1, base_uv[1]-1);
break;
case 1:
uv1 = UVpt(base_uv[0]+1, base_uv[1]);
uv2 = UVpt(base_uv[0]+2, base_uv[1]);
uv3 = UVpt(base_uv[0]+1, base_uv[1]+1);
uv4 = UVpt(base_uv[0]+2, base_uv[1]+1);
break;
case 2:
uv1 = UVpt(base_uv[0], base_uv[1]+1);
uv2 = UVpt(base_uv[0]+1, base_uv[1]+1);
uv3 = UVpt(base_uv[0], base_uv[1]+2);
uv4 = UVpt(base_uv[0]+1, base_uv[1]+2);
break;
case 3:
uv1 = UVpt(base_uv[0]-1, base_uv[1]);
uv2 = UVpt(base_uv[0], base_uv[1]);
uv3 = UVpt(base_uv[0], base_uv[1]+1);
uv4 = UVpt(base_uv[0]-1, base_uv[1]+1);
break;
default:
cerr << "ProxySurface::neighbor_face: invalid diraction" << endl;
assert(0);
}
Bvert* v1 = get_vert_grid(uv1);
Bvert* v2 = get_vert_grid(uv2);
Bvert* v3 = get_vert_grid(uv3);
Bvert* v4 = get_vert_grid(uv4);
if(!v1 || !v2 || !v3 || !v4)
return 0;
Bface* n = lookup_quad(v1, v2, v3, v4);
assert(n);
assert(n->is_quad());
n = (n->is_quad_rep()) ? n : n->quad_partner();
return n;
}
void
ProxySurface::grow_quad_from_edge(BMESH* m, EdgeStrip* boundary, int i)
{
// i is the position of the edge in the boundary
Bedge* e = boundary->edge(i);
assert(e);
//make sure is still a boundary edge if not, return...
if(e->nfaces() > 1){
return;
}
Bvert* v2 = boundary->vert(i);
Bvert* v1 = boundary->next_vert(i);
assert(v1);
assert(v2);
if(!(UVdata::is_continuous(e)))
{
cerr << "ProxySurface::grow_quad_from_edge: e is discontinous!!!" << endl;
return;
}
UVpt uv_1, uv_2, uv_3, uv_4;
if(!(UVdata::get_uv(v2, uv_2)))
{
cerr << "ProxySurface::grow_quad_from_edge: v2 vertex does not have UVdata!!!" << endl;
return;
}
if(!(UVdata::get_uv(v1, uv_1)))
{
cerr << "ProxySurface::grow_quad_from_edge: v1 vertex does not have UVdata!!!" << endl;
return;
}
// constant in u dir -> v line
if(uv_1[0] == uv_2[0]){
if(uv_1[1] > uv_2[1])
{
uv_3 = UVpt(uv_2[0]+1,uv_2[1]);
uv_4 = UVpt(uv_1[0]+1,uv_1[1]);
} else {
uv_3 = UVpt(uv_2[0]-1,uv_2[1]);
uv_4 = UVpt(uv_1[0]-1,uv_1[1]);
}
} else {
assert(uv_1[1] == uv_2[1]);
//constant in v dir
if(uv_1[0] > uv_2[0])
{
uv_3 = UVpt(uv_2[0],uv_2[1]-1);
uv_4 = UVpt(uv_1[0],uv_1[1]-1);
} else {
uv_3 = UVpt(uv_2[0],uv_2[1]+1);
uv_4 = UVpt(uv_1[0],uv_1[1]+1);
}
}
// double dist = e->length();
//cerr << "grow quad: " << i << " " << uv_1 << " " << uv_2 << " " << uv_3 << " " << uv_4 << endl;
Bvert* v_1 = vertFromUV(uv_1);
Bvert* v_2 = vertFromUV(uv_2);
Bvert* v_3 = vertFromUV(uv_3);
Bvert* v_4 = vertFromUV(uv_4);
assert(v_1 && v_2 && v_3 && v_4);
//cerr << "grow quad: " << i << " " << v_1->wloc() << " " << v_2->wloc() << " " << v_3->wloc() << " " << v_4->wloc() << endl;
m->add_quad(v_1, v_2, v_3, v_4,
uv_1, uv_2, uv_3, uv_4,
m->patch(0));
UVdata::set(v_1, uv_1);
UVdata::set(v_2, uv_2);
UVdata::set(v_3, uv_3);
UVdata::set(v_4, uv_4);
//PixelsData::get_pix(v_1, this);
//PixelsData::get_pix(v_2, this);
//PixelsData::get_pix(v_3, this);
//PixelsData::get_pix(v_4, this);
PixelsData::set_pix(v_1, this,v_1->pix());
PixelsData::set_pix(v_2, this,v_2->pix());
PixelsData::set_pix(v_3, this,v_3->pix());
PixelsData::set_pix(v_4, this,v_4->pix());
}
