class_name CameraController extends Node3D
## Simple first-person camera motion controller

const PITCH_LIMIT := deg_to_rad(85.0)

@export var yaw_root: Node3D

@onready var _target := Vector2(rotation.x, rotation.y)


## Rotate the camera by the given motion vector.
##
## The input motion vector is the change in pitch and yaw in radians.
func camera_motion(motion: Vector2) -> void:
	_target.y -= motion.x
	_target.x = clampf(_target.x - motion.y, -PITCH_LIMIT, PITCH_LIMIT)


func _physics_process(delta: float) -> void:
	var accel: float = ProjectSettings.get_setting("game/config/input/camera_acceleration")
	var weight := 1.0 - exp(-accel * delta)
	yaw_root.rotation.y = lerp_angle(yaw_root.rotation.y, _target.y, weight)
	rotation.x = lerp_angle(rotation.x, _target.x, weight)