//! Same as try_select_edge(), but deselects.
//! Also requires the found edge is currently selected.
bool
SELECT_WIDGET::try_deselect_edge(CPIXEL &pix)
{
Bedge* e = find_edge(pix);
if (!(e && e->is_selected()))
return false;
WORLD::add_command(new MESH_DESELECT_CMD(e));
return true;
}
bool
SELECT_WIDGET::select_edges(CPIXEL_list& pts)
{
err_adv(debug, "SELECT_WIDGET::select_edges:");
if (pts.num() < 2) {
err_adv(debug, " bad gesture: %d points", pts.num());
return false;
}
// Find edit-level vert near start of pixel trail:
Bvert* v = find_vert(pts[0]);
if (!v) {
err_adv(debug, " can't get starter vertex");
return false;
}
// 2. Extract edge sequence within tolerance of gest
Bedge_list chain;
int k = 0; // index of cur position in gesture
Bvert* cur = v; // current vertex
Bedge* e = 0;
while ((e = match_span(cur, pts, k))) {
if(!e->is_selected()) chain += e;
cur = e->other_vertex(cur);
}
err_adv(debug, " got %d edges", chain.num());
// Confirm gest is sufficiently close to edge chain
// 3. Select the edges
WORLD::add_command(new MESH_SELECT_CMD(chain));
return true;
}