Oneway platform collision mask problem

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1

Godot Version

4.5

Question

Made a one way platform by using area3D to detect body collision. If the block is in a group (“oneway”) and if player’s velocity.y is +/- then en/disabling layer mask. Player becomes stuck in the block when jump from the side in.

# PLAYER.gd

var inside_oneway : bool = false

func _process(_delta: float) -> void:
	## PLAYER COLLSIION: 8 , DETECTS: 1 (FLOOR) / 2 (ONE_WAY)
	if velocity.y > 0:
		### DISABLE COLLISION
		oneway_disable_collision()
	### ENABLE COLLISION IN AREA EXIT()
	elif velocity.y <= 0 and inside_oneway == false:
		oneway_enable_collision()
		
### PLAYER'S AREA3D
func _on_player_area_3d_body_entered(body: Node3D) -> void:
	if body.is_in_group("oneway"):
		inside_oneway = true
func _on_player_area_3d_body_exited(body: Node3D) -> void:
	if body.is_in_group("oneway"):
		inside_oneway = false
	
### SET ONEWAY COLLISION MASK
func oneway_disable_collision():
	set_collision_mask_value(2, false)
func oneway_enable_collision():
	set_collision_mask_value(2, true)

note: print results in mix bools when player jumps into the block

start jumping = false false false..

inside the block = true true false false true true

outside the block = false false false..

2

You are way overcomplicating this. All you have to do is use a StaticBody2D for your platform and check the One Way Collision box on the attached CollisionShape2D. You can also do the same with TileMapLayers. Here’s a quick video to show you how:

No code needed.

3

But I am doing this with static block 3D.

4

I missed that before.

You probably need to use the CharacterBody3D’s collisions instead of an Area3D. It’s more precise. Or perhaps a ShapeCast3D. You’re also don’t need to add them all to a group if you’re using an Area3D or ShapeCast3D. You can just put them on a different physics layer.

You also might consider moving this code to the StaticBody3D. Let it detect collisions, and then make decisions about whether to be on or off.

1 Like
5

Changed to Jolt physic fixes it.:+1: I’m on 4.5 so Jolt was not default.

2 Likes