Lerping to 270° causes infinite rotation

lukaspaver

Godot Version

`4.4.1`

Question

When I try to rotate a cube for 90°, it generally works, but as soon as the next_rotation is 270°, the cube keeps spinning forever and doesn't reach the 270° degrees.

extends MeshInstance3D # This is a simple cube mesh in the game.

var next_rotation: float

func _unhandled_key_input(event: InputEvent) → void:
	if Input.is_action_pressed(“rotate”):
	  next_rotation += 90.0
	
		if next_rotation == 360.0:
			next_rotation = 0.0
		
		print(next_rotation)


func _process(delta: float) → void:
   global_rotation_degrees.y = lerp(global_rotation_degrees.y, next_rotation, 0.1)

lukaspaver

Here's a video:

lukaspaver

Solution:

extends MeshInstance3D

var next_rotation: float

func _unhandled_key_input(event: InputEvent) -> void:
if Input.is_action_pressed("rotate"):
next_rotation += PI / 2

	if next_rotation == TAU:
		next_rotation = 0.0
	
	print(next_rotation)

func _process(delta: float) -> void:
rotation.y = lerp_angle(rotation.y, next_rotation, 10 * delta)