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cgal
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don't draw self-loops and don't create an empty group object

This commit is contained in:
Daniel Funke 2023-10-16 10:51:41 +02:00
parent b67b389d63
commit 1ab5e1de4a
1 changed files with 9 additions and 2 deletions
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11
CGAL_ipelets/demo/CGAL_ipelets/nng.cpp
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@ -56,6 +56,7 @@ void nngIpelet::protected_run(int /*fn*/)
Triangulation t(pt_list.begin(), pt_list.end());
bool edgesDrawn = false;
for(auto v = t.finite_vertices_begin();
v != t.finite_vertices_end();
++v){
@ -64,11 +65,17 @@ void nngIpelet::protected_run(int /*fn*/)
CGAL::nearest_neighbors(t, v, kNeighbors+1, std::back_inserter(kNN)); // +1 as v itself counts as its nearest neigbhor for CGAL::nearest_neighbors
for(const auto & nn : kNN) {
draw_in_ipe(Kernel::Segment_2(v->point(), nn->point()));
if(v->point() != nn->point()) {
draw_in_ipe(Kernel::Segment_2(v->point(), nn->point()));
edgesDrawn = true;
}
}
}
group_selected_objects_();
if(edgesDrawn) {
group_selected_objects_();
// don't create an empty group if no edges are drawn
}
}
}