In cases when objects are not present on the scene (e.g. generated exterior
cells) navmesh is not updated because area that suppose to be covered with it
was not updated. It was updated only during cell change. This is a regression
from d15e1dca84.
Set TileCachedRecastMeshManager range on NavMeshManager update to make sure it
always covers correct area around player.
Return a union of objects, heightfields and water ranges from
getLimitedObjectsRange intersected with range provided above.
If object is too big iteration over all tiles covering it can take too much
time. Limit bounds to a square around a player position to cover only tiles
that will be present in navmesh based on max tiles number option.
Each object is associated with a set of tiles its present in. Culling can
reduce this set but it has to be update when bounds change position. Do this
in TileCachedRecastMeshManager::setBounds updating the set and adding/removing
objects to the corresponding CachedRecastMeshManagers.
