function output = plot(obj)
  [x, y, z] = sphere;
  x = obj.radius*x + obj.center(1);
  y = obj.radius*y + obj.center(2);
  z = obj.radius*z + obj.center(3);
  plotHandle = surf(x, y, z,...
    "FaceColor", "magenta",...
    "FaceAlpha", 0.3,...
    "EdgeColor", "magenta",...
    "EdgeAlpha", 1);
  output = plotHandle;
end