/// <summary>
/// Uses Display3 to render the object. This is slow for animation. Better to create a Mesh and then render it. This
/// will use OpenGL directly.
/// </summary>
/// <param name="body"></param>
/// <param name="doc"></param>
/// <param name="c"></param>
/// <param name="opt"></param>
/// <returns></returns>
public static IDisposable DisplayUndoable(this IBody2 body, IModelDoc2 doc, Color?c = null, swTempBodySelectOptions_e opt = swTempBodySelectOptions_e.swTempBodySelectOptionNone)
{
body.DisplayTs(doc, c, opt);
return(Disposable.Create(() => body.Hide(doc)));
}