private void Cut_Click(object sender, EventArgs e)
{
TriMeshModify.ComputeSelectedEdgeFromColor(Mesh);
double move = TriMeshUtil.ComputeEdgeAvgLength(Mesh) * 0.1;
TriMeshEdgeCutFromBoundary cut = new TriMeshEdgeCutFromBoundary(Mesh);
cut.Cut(move);
TriMeshUtil.ClearMeshColor(Mesh);
TriMeshUtil.ShowBoundary(Mesh);
TriMeshUtil.FixIndex(Mesh);
TriMeshUtil.SetUpNormalVertex(Mesh);
OnChanged(EventArgs.Empty);
}