/*!
\example Alpha_shapes_3/ex_alpha_shapes_3.cpp
\example Alpha_shapes_3/ex_alpha_shapes_exact_alpha.cpp
\example Alpha_shapes_3/ex_alpha_shapes_with_fast_location_3.cpp
\example Alpha_shapes_3/ex_fixed_weighted_alpha_shapes_3.cpp
\example Alpha_shapes_3/ex_periodic_alpha_shapes_3.cpp
\example Alpha_shapes_3/ex_weighted_alpha_shapes_3.cpp
\example Alpha_shapes_3/ex_weighted_periodic_alpha_shapes_3.cpp
\example Alpha_shapes_2/ex_alpha_projection_traits.cpp
*/