Proposal: Runtime NavigationMesh baker for HTerrain

[GetUpSii]

Hi Zylann,I really like your plugin design.

Since HTerrain does not directly provide navigation baking, I created a small helper script:

HTerrainNavBaker.gd

hterrain_nav_baker.txt

It does:

• Generate a mesh from HTerrain heightmap
• Create temporary StaticBody3D collision geometry
• Bake NavigationMesh through NavigationRegion3D
• Remove temporary nodes after baking

It works with Godot 4.7.

I found that for HTerrain generated navigation, a small cell_height value works better:

nav_mesh.cell_height = 0.01

Otherwise NavigationAgent3D may return path points with height.

Would this be useful as an optional utility in HTerrain?
I can submit a Pull Request if you think it fits the project.

Thanks!

[Zylann]

While I don't deny the usefulness of having navigation work out of the box, it's work, and something I don't plan to add at the moment, in large part because, as mentionned before, I currently don't work on new features (reviewing PRs for such features is work too).
The way you would do it normally is by having already a navigation node in your scene, using the existing Generate Mesh tool of the terrain and then bake your navigation stuff using regular Godot stuff and all the things it already exposes, then get rid of the temporary mesh. Historically it's been that way because for a very long time Godot didn't expose any API for plugins to register themselves to navigation baking.
Your script might work for you, but it hardcodes a lot of things that would otherwise have to be exposed, and somewhat assumes the terrain is the center of everything there is in the game, while it's not true (there are other things in a scene than just a terrain).

[GetUpSii]

OK, Thank you. 2056681440 ***@***.***