public void Make2D(ViewportBase viewport, Viewport2D.ViewDirection direction)
{
var vp = ViewportManager.Make2D(viewport, direction);
Renderer.Register(new[] { vp });
vp.RenderContext.Add(new ToolRenderable());
vp.RenderContext.Add(new HelperRenderable(this));
Renderer.UpdateGrid(Map.GridSpacing, Map.Show2DGrid, Map.Show3DGrid, false);
}