/// <summary>
/// split input mesh into submeshes based on group ID
/// **does not** separate disconnected components w/ same group ID
/// </summary>
public static DMesh3[] SeparateMeshByGroups(DMesh3 mesh, out int[] groupIDs)
{
Dictionary <int, List <int> > meshes = new Dictionary <int, List <int> >();
foreach (int tid in mesh.TriangleIndices())
{
int gid = mesh.GetTriangleGroup(tid);
List <int> tris;
if (meshes.TryGetValue(gid, out tris) == false)
{
tris = new List <int>();
meshes[gid] = tris;
}
tris.Add(tid);
}
DMesh3[] result = new DMesh3[meshes.Count];
groupIDs = new int[meshes.Count];
int k = 0;
foreach (var pair in meshes)
{
groupIDs[k] = pair.Key;
List <int> tri_list = pair.Value;
result[k++] = DSubmesh3.QuickSubmesh(mesh, tri_list);
}
return(result);
}
