Thoughts about the feasibility of adding a RTree::relocate_with_selection_function() method

[WildRackoon]

If I am not mistaken, currently the only way to change the envelope of an RTreeObject within the tree is to remove then re-insert it somewhere else later.
Most generically using:

• Either remove_with_selection_function() or drain_with_selection_function()
• Then using insert()

I am not familiar with all the technical details of rstar, but like most trees, I believe there may be some optimization to be done in some area:

• Moving an RTreeObject within the same leaf
• If the move is small, going up leaves would be faster than looking to insert from the root (That would require choosing a Strategy / Policy)

It would probably need some work for all primitives, like GeomWithData.

Resulting methods would probably look like:

• pub fn relocate_with_selection_function<F> (&mut self, function: F, new_envelope: RTreeObject) -> Option<T>
• pub fn relocate_all_with_selection_function<F>(&mut self, function: F, new_envelope: RTreeObject) -> Option<T>