private int[] GetRegions(IMesh mesh)
{
mesh.Renumber();
var labels = new int[mesh.Triangles.Count];
var regions = new SortedSet <int>();
foreach (var t in mesh.Triangles)
{
labels[t.ID] = t.Label;
regions.Add(t.Label);
}
if (colors.ColorDictionary == null)
{
colors.CreateColorDictionary(regions, regions.Count);
}
return(labels);
}