// 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;
}
int
SELECT_WIDGET:: slash_cb(CGESTUREptr& gest, DrawState*& s)
{
if (_mode==SEL_FACE) //widget is in face selection mode
{
select_list.clear();
Bface* f = find_face(gest->start(),0.25,MIN_PIX_AREA);
// f should be the currently selected face
if (f && f->is_selected() && f->is_quad())
{
f=f->quad_rep();
//line in screen space coresponding to the slash
PIXELline slash(gest->start(),gest->end());
Bedge *e1,*e2,*e3,*e4;
Bedge* edge = 0;
//get and test the quad edges against the stroke line
f->get_quad_edges(e1,e2,e3,e4);
if( e1->pix_line().intersect_segs(slash) )
{
edge=e1;
}
else
if( e2->pix_line().intersect_segs(slash) )
{
edge=e2;
}
else
if( e3->pix_line().intersect_segs(slash) )
{
edge=e3;
}
else
if( e4->pix_line().intersect_segs(slash) )
{
edge=e4;
}
else
{
//error
cerr << "ERROR no intersection" << endl;
return 1;
}
//walk the geometry and select faces
Bface* fn = f;
do
{
if (!fn->is_selected())
select_list +=fn;
assert(edge); //I'm paranoid too
assert(edge->f1()!=edge->f2());
//grabs the face on the other side of the edge
//even if we are not directly adjacent to this edge
fn=fn->other_quad_face(edge);
if (fn) //if a valid face than advance the edge pointer
{
assert(edge!=fn->opposite_quad_edge(edge));
edge = fn->opposite_quad_edge(edge);
fn = fn->quad_rep(); //all faces on the selection list are rep faces
}
else
cerr << "No face on the other side of the edge" << endl;
} //quit if not a valid face or not a quad
while(fn&&(fn->is_quad())&&edge&&(fn!=f));
_mode=SLASH_SEL; //go into pattern editing mode
end_face=0; //prepare the 2nd step data
pattern=0;
for (int i=0; i<MAX_PATTERN_SIZE; i++)
pattern_array[i]=1; //fill the default pattern with ones
}
else
cerr << "This is not a quad" << endl;
}
else
if( _mode==SLASH_SEL)//pattern editing mode
{ //activates upon second slash motion
//adds the entire list to the selected group
//undo deselects the entire group
Bface_list final_list;
//copy the face pointers to the final list
//using the pattern as a repeating template
//and stop at the end face
for (int i = 0; i<(end_face ? (end_face) : select_list.num()) ; i++)
{
if (pattern ? pattern_array[(i%pattern)+1] : 1)
final_list+=select_list[i];
}
WORLD::add_command(new MESH_SELECT_CMD(final_list));
return cancel_cb(gest,s);
}
else
cerr << "wrong mode " << endl;
return 1;
}
