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Add 4.5 upgrade Navigation notes

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Adds 4.5 upgrade Navigation notes.
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smix8
2025-09-19 20:29:46 +02:00
parent e6bcdd2f44
commit 9d281b035b
1 changed files with 19 additions and 0 deletions
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tutorials/migrating/upgrading_to_godot_4.5.rst
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@@ -231,6 +231,25 @@ Core
the shortest arc between the two input vectors. Previously, it would return incorrect values for certain inputs
(`GH-107618`_).
Navigation
~~~~~~~~~~
.. note::
By default, the regions in a NavigationServer map now update asynchronously using threads to improve performance.
This can cause additional delay in the update due to thread synchronisation.
The asynchronous region update can be toggled with the ``navigation/world/region_use_async_iterations`` project setting.
.. note::
The merging of navmeshes in the NavigationServer has changed processing order. Regions now merge and cache
internal navmeshes first, then the remaining free edges are merged by the navigation map.
If a project had navigation map synchronisation errors before, it might now have shifted
affected edges, making already existing errors in a layout more noticeable in the pathfinding.
The ``navigation/2d_or_3d/merge_rasterizer_cell_scale`` project setting can be set to a lower value
to increase the detail of the rasterization grid (with `0.01` being the smallest cell size possible).
If edge merge errors still persist with the lowest possible rasterization scale value,
the error may be caused by overlap: two navmeshes are stacked on top of each other, causing geometry conflict.
Physics
~~~~~~~