Mobile Sensors Demo GyroAndGrav rotation inaccurate

[StockerGaming]

In the demo project "Mobile Sensors Demo" the GyroAndGrav cube is rotated incorrectly when the phone is tilted on its side and then tilted up and down. When you do this, the cube is erroneously also rotates around the real world y axis, which does not correspond to the actual orientation of the phone.

[StockerGaming]

Managed to make a demo without this effect (this works as a script for any Node3D):

var yaw = 0
var old_up

var k : float = 0

func _ready():
	old_up = -1 * Input.get_gravity() 

func _physics_process(delta):
	var up = -1 * Input.get_gravity()
	var angle = up.angle_to(Vector3.UP)
	var axis = up.cross(Vector3.UP).normalized()
	
	transform.basis = Basis()
	rotate_object_local(axis, angle)
	
	var gyro = Input.get_gyroscope()
	var x_percentage = transform.basis.x.dot(Vector3.UP)
	var y_percentage = transform.basis.y.dot(Vector3.UP)
	var z_percentage = transform.basis.z.dot(Vector3.UP)
	
	var up_projected = Vector2(up.x, up.z)
	var old_up_projected = Vector2(old_up.x, old_up.z)
	
	yaw -= (1 - y_percentage) * up_projected.angle_to(old_up_projected)
	
	yaw += delta * x_percentage * gyro.x
	yaw += delta * y_percentage * gyro.y
	yaw += delta * z_percentage * gyro.z
	
	rotate_y(yaw)
	old_up = up

[Calinou]

Which Godot version are you using?

PS: Code blocks should use triple backticks like this (with an optional language name for syntax highlighting):

```gdscript
code here
```

I edited your post accordingly, but remember to do this in the future 🙂

[StockerGaming]

Ah many thanks, was struggling with that. I am using Godot 4.1, sorry for not mentioning that earlier.

[StockerGaming]

Note: This effect happens in the demo too if one comments out the line:

yaw -= (1 - y_percentage) * up_projected.angle_to(old_up_projected)

It is there to combat the incorrect yaw inference made by rotating the basis in an effort to match the y axis to the gravity vector.