You don't have to "return" it, just set the variables like this:
func repeat_me():
if Input.is_action_pressed("reset_camera"):
building.set_translation(Vector3(0,0,-5))
Bitemnode.set_translation(Vector3( 0, 0 ,-5))
x = 0
y = 5
z = 0
if Input.is_action_pressed("pos_up"):
y += 0.1
Bitemnode.set_translation(Vector3( x, z ,y))
if Input.is_action_pressed("pos_down"):
y-=0.1
Bitemnode.set_translation(Vector3( x, z ,y))
if Input.is_action_pressed("pos_left"):
x+=0.1
Bitemnode.set_translation(Vector3( x, z ,y))
if Input.is_action_pressed("pos_right"):
x-=0.1
Bitemnode.set_translation(Vector3( x, z ,y))
if Input.is_action_pressed("pos_high"):
z+=0.1
Bitemnode.set_translation(Vector3( x, z ,y))
if Input.is_action_pressed("pos_low"):
z-=0.1
Bitemnode.set_translation(Vector3( x, z ,y))
But I suggest that you refactor your code to this, or something like that:
var y = -5
var z = 0
var x = 0
export (NodePath) var camera_reset_cupdown
onready var building = get_node(camera_reset_cupdown)
func repeat_me():
if Input.is_action_pressed("reset_camera"):
building.set_translation(Vector3(0,0,-5))
x = 0
y = 5
z = -5
if Input.is_action_pressed("pos_up"):
y += 0.1
if Input.is_action_pressed("pos_down"):
y-=0.1
if Input.is_action_pressed("pos_left"):
x+=0.1
if Input.is_action_pressed("pos_right"):
x-=0.1
if Input.is_action_pressed("pos_high"):
z+=0.1
if Input.is_action_pressed("pos_low"):
z-=0.1
Bitemnode.set_translation(Vector3(x, z ,y))
Note: the function is just an example how to do it, I didn't test it or anything. But I think that your code has an issue; why do you set Bitemnode translation after each sentence, you should doo that at the end, once. Otherwise every next set_translation will rewrite the previous one. The best way is to calculate the final x, y, z translation, and apply it at the end, once.