tutorials/navigation/navigation_using_navigationobstacles

[giscus[bot]]

tutorials/navigation/navigation_using_navigationobstacles

2D and 3D versions of NavigationObstacles nodes are available as NavigationObstacle2D and NavigationObstacle3D respectively. Navigation obstacles are dual purpose in that they can affect both the n...

https://docs.godotengine.org/en/stable/tutorials/navigation/navigation_using_navigationobstacles.html

[ChickensioDev]

ur supposed to put the navigation obstacle 2ds as child of navigation region 2d in order for it to work. i spent over an hour searching everywhere. youtube, docs, and it wasnt mentioned and i just happened to find that out by chance.

[Dirk-Sandberg]

What if I'm using a NavigationLayer inside of a TileMapLayer node? I have a separate scene (a pillar, not part of the tileset) which I want to use as a NavigationObstacle2D, but the pillar doesn't seem to affect the NavigationLayer.

[ankhzet]

I enden up putting all layers inside a NavigationRegion2D node and re-baking nav mesh after some minimal delay after the map node is _ready() and all obstacle scenes instantiated.
In my case, the obstacle scene(s) do not have NavigationObstacle2D or NavigationObstacle2D child nodes, it has a collider, which gets properly baked in the nav mesh, but when I tried NavigationObstacle2D nodes, they worked just fine.
Relevant code:

class_name Map extends NavigationRegion2D

var _size = Vector2(0, 0)


func load_map(prefab: PackedScene):
	var layers = prefab.instantiate().get_children()

	for child in layers:
		child.owner = null
		child.reparent(self)

		# if nav mash isn't shown in debug mode, try to disable the layers, visualizer might have low z-index
		# if child is TileMapLayer:
			# child.visible = false

	for child in get_children():
		if child is TileMapLayer:
			_size = child.get_used_rect().size * child.rendering_quadrant_size # use first layer (ground layer) to get map size
			break

	camera.adjust(_size)

# this callback is called by the child scenes of the scene layers (in the _ready())
# you can use parent reference search or a signal
func add_entity(entity: Entity, pos: Vector2) -> Entity:
	if entity.is_static():
		_debounce()

var _timer: SceneTreeTimer

func _debounce():
	var timer = get_tree().create_timer(0.1)
	_timer = timer
	await timer.timeout
	if _timer != timer:
		return

	_timer = null
	bake_navigation()

# i only bake nav mesh once on load, if obstacles are added dynamically, 
# this should be split into initial-mesh-bake and mesh-update parts
func bake_navigation():
	navigation_polygon = NavigationPolygon.new()

	var bounding_outline = PackedVector2Array([
		Vector2(0, 0),
		Vector2(0, _size.y),
		Vector2(_size.x, _size.y),
		Vector2(_size.x, 0),
	])
	navigation_polygon.agent_radius = 1
	navigation_polygon.add_outline(bounding_outline)

	self.bake_navigation_polygon()

[Floofwoof16]

Thank you for mentioning the need to put the obstacles as children of the region, I also didn't find that info anywhere and needed it.

[iway1]

i find it very confusing this article is about the NavigationObstacle classes but the code examples don't use the NavigationObstacle classes