void add_all_edges(int ei, HashSet <int> edge_set)
{
Index2i et = fillmesh.GetEdgeT(ei);
Index3i te = fillmesh.GetTriEdges(et.a);
edge_set.Add(te.a); edge_set.Add(te.b); edge_set.Add(te.c);
te = fillmesh.GetTriEdges(et.b);
edge_set.Add(te.a); edge_set.Add(te.b); edge_set.Add(te.c);
}
EdgeLoop select_loop_tris_hint(MeshBoundaryLoops loops)
{
var hint_edges = new HashSet <int>();
foreach (int tid in BorderHintTris)
{
if (Mesh.IsTriangle(tid) == false)
{
continue;
}
Index3i et = Mesh.GetTriEdges(tid);
for (int j = 0; j < 3; ++j)
{
if (Mesh.IsBoundaryEdge(et[j]))
{
hint_edges.Add(et[j]);
}
}
}
int N = loops.Count;
int best_loop = -1;
int max_votes = 0;
for (int li = 0; li < N; ++li)
{
int votes = 0;
EdgeLoop l = loops[li];
foreach (int eid in l.Edges)
{
if (hint_edges.Contains(eid))
{
votes++;
}
}
if (votes > max_votes)
{
best_loop = li;
max_votes = votes;
}
}
if (best_loop == -1)
{
return(null);
}
return(loops[best_loop]);
}