Zylann heightmap collision

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1

Godot Version

4.4

Question

I am using the Zylann heightmap plugin. I have a CharacterBody3D player character that I want to have move along the surface of the terrain.

For some reason it’s not able to detect collision between the player character and the terrain. I would expect move_and_collide to return something when it goes through the terrain, but it never returns anything.

func _process(delta: float) -> void:
	var collision = move_and_collide(Vector3(-1,0,0) * delta)
	if collision != null:
		print(collision)

Am I missing something here? Is there a better way detect collision between a character body and a heightmap terrain object? Is there a better way in general to figure out what direction is perpendicular to the terrain at a point so I can figure out what direction the character should move in?

2

The Collision section in the docs you link says collision is off by default and needs to be enabled in the inspector. Have you done that?

1 Like
3

Yes. In fact, it is definitely able to collide with Rigidbody3D based objects (I have tested this and it works).

Is a kinematic collision a fundamentally different collision system? That move_and_collide function is supposed to return a KinematicCollision3D object.

4

We’re outside my experience here, so I’m speculating, but I’m assuming it returns a kinematic collision so you can do things like place a character’s feet properly.

1 Like
5

I think you’re right. Unfortunately it seems like it’s not returning anything at all and the character just phases through the terrain. The docs are a bit short, and digging into the source code hasn’t given me any insights so far, but I’ll keep looking.