public static void Main(string[] args)
{
var sphere = new Sphere(10);
var cylinder = new Cylinder(10, 10);
var composite = new CompositeShape(new List <Shape3d> {
cylinder, sphere
});
Console.WriteLine(composite.SurfaceArea());
Console.WriteLine(composite.Volume());
var sv = new SubsumedVisitor();
sv.Render(new OpenGL(), composite);
sv.Render(new SVG(), composite);
}