When to delete the "prepared erasing" landmarks?

[vzhr]

Hi!
After we calling "landmark::prepare_for_erasing()", when can delete the landmark object? With the time our SLAM increasing, the memory will be occupied much bigger.

[ymd-stella]

After we calling "landmark::prepare_for_erasing()", when can delete the landmark object?

You can delete landmarks that are no longer referenced by the object.
(If you want to find out more, experiment by #139 might be useful.)

With the time our SLAM increasing, the memory will be occupied much bigger.

#139 resolves this memory resource problem. (shared_ptr releases unreferenced objects.)