Godot 4 FPS controller

body.gd

extends RigidBody3D

@export var speed:float = 10.0
@export var jump_force = 5.0

@onready var camera:Camera3D = $Camera3D
@onready var ground_sensor:RayCast3D = $GroundSensor

func _ready():
	pass

func _physics_process(delta):
	var motion = Vector3()
	if Input.is_action_pressed("move_forward"):
		motion.x += 1
	if Input.is_action_pressed("move_backwards"):
		motion.x -= 1
	if Input.is_action_pressed("move_left"):
		motion.z -= 1
	if Input.is_action_pressed("move_right"):
		motion.z += 1
	
	motion = motion.rotated(Vector3.UP,camera.rotation.y+PI/2)
	if ground_sensor.is_colliding():
		move_and_collide(Vector3(motion.x,0,motion.z)*delta*speed)
	else:
		move_and_collide(Vector3(motion.x,0,motion.z)*delta*speed/2)


func _input(event):
	if event.is_action_pressed("jump"):
		if ground_sensor.is_colliding():
			apply_central_impulse(Vector3(0,jump_force,0))
			pass
		pass
	pass

camera.gd

extends Camera3D
# cam look.
#Only moves the camera if the mouse is captured.

@export var minLookAngle : float = -90.0
@export var maxLookAngle : float = 90.0
@export var lookSensitivity : float = 0.5

var mouseDelta : Vector2 = Vector2()

func _ready():
	Input.mouse_mode = Input.MOUSE_MODE_CAPTURED

func _input(event):         
	if Input.mouse_mode == Input.MOUSE_MODE_CAPTURED:
		# did the mouse move?
		if event is InputEventMouseMotion:
			mouseDelta = event.relative
	if event.is_action_pressed("unlock_mouse"):
		if Input.mouse_mode != Input.MOUSE_MODE_CAPTURED:
			Input.mouse_mode = Input.MOUSE_MODE_CAPTURED
		else:
			Input.mouse_mode = Input.MOUSE_MODE_VISIBLE
		
func _process(delta):
	if Input.mouse_mode == Input.MOUSE_MODE_CAPTURED:
		# rotate camera along X axis
		rotation_degrees -= Vector3(rad_to_deg(mouseDelta.y), 0, 0) * lookSensitivity *delta
		# clamp the vertical camera rotation
		rotation_degrees.x = clamp(rotation_degrees.x, minLookAngle, maxLookAngle)
		# rotate player along Y axis
		rotation_degrees -= Vector3(0, rad_to_deg(mouseDelta.x), 0) * lookSensitivity *delta
		mouseDelta = Vector2.ZERO