Pathfinding 3D procedural terrain

[Lojith]

Godot Version

4.3 stable official

Question

I’m following along with the navigation mesh script template on the docs which details how to update a navigation region with procedurally generated mesh data.

(see bottom of the page) (Using navigation meshes — Godot Engine (stable) documentation in English)

Run into an issue, namely calling NavigationServer3D.region_set_map(region_rid, get_world_3d().get_navigation_map()) where get_world_3d() is returning null.

The .gd class I’m calling it from extends MeshInstance3D should that matter.

[smix8]

The Viewport did not even have enough time to init its World3D ref or the node from where you called the script was not in the SceneTree / did not join the world.

So whatever you do don’t do it in the init() phase or on a thread on the very first frame. You need to give the SceneTree some time to setup at least the basics.

[Lojith]

nah it’s all good. The generate_terrain method was being called prior to the chunk being added as a child to its parent object.

func create_chunk_at_index(x, y) -> void:		
	var chunk : Chunk = chunk_prefab.instantiate()
	chunk.set_pos(Vector3(x * Chunk.SIZE, 0, y * Chunk.SIZE))
	chunk.generate_terrain(noise)
	add_child(chunk)

became

func create_chunk_at_index(x, y) -> void:		
	var chunk : Chunk = chunk_prefab.instantiate()
	add_child(chunk)
	chunk.set_pos(Vector3(x * Chunk.SIZE, 0, y * Chunk.SIZE))
	chunk.generate_terrain(noise)