void CreateTriangleFromSelection()
{
if (plotter.VertexSelectionCount == 3)
{
List <HairyPlotterVertex> vertices = plotter.SelectedVertices;
plotter.CurrentAction = HairyPlotterActions.None;
plotter.CreateTriangle(vertices[0], vertices[1], vertices[2]);
plotter.ClearVertexSelection();
}
}