Updated FPS tutorial to 3.0 (#1202)

* Updated script to 3.0 version

Use '$' instead of 'get_node'.
Functions '_process', _physics_process', '_input' and other similar functions will be detected automatically since 3.0.

tutorials/3d/fps_tutorial/part_one.rst

@@ -149,15 +149,12 @@ Add the following code to ``Player.gd``:
     var flashlight
 
     func _ready():
-        camera = get_node("Rotation_helper/Camera")
-        camera_holder = get_node("Rotation_helper")
-
-        set_physics_process(true)
-
+        camera = $Rotation_helper/Camera
+        camera_holder = $Rotation_helper
+        
         Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)
-        set_process_input(true)
-
-        flashlight = get_node("Rotation_helper/Flashlight")
+        
+        flashlight = $Rotation_helper/Flashlight
 
     func _physics_process(delta):
         var dir = Vector3()
@@ -255,7 +252,7 @@ _________
 Now lets look at the ``_ready`` function:
 
 First we get the ``camera`` and ``rotation_helper`` nodes and store them into their variables.
-After that we set ``_physics_process`` to ``true``. Then we need to set the mouse mode to captured.
+Then we need to set the mouse mode to captured.
 
 This will hide the mouse and keep it at the center of the screen. We do this for two reasons:
 The first reason being we do not want to the player to see their mouse cursor as they play.
@@ -266,7 +263,7 @@ would lose focus. To assure neither of these issues happen, we capture the mouse
 .. note:: see :ref:`Input documentation <class_Input>` for the various mouse modes. We will only be using
           ``MOUSE_MODE_CAPTURED`` and ``MOUSE_MODE_VISIBLE`` in this tutorial series.
 
-Finally, we call ``set_process_input(true)``. We need to use ``_input`` so we can rotate the player and
+We need to use ``_input`` so we can rotate the player and
 camera when there is mouse motion.
 
 _________

tutorials/3d/fps_tutorial/part_three.rst

@@ -160,7 +160,7 @@ Now we need to remove a bullet from the gun when we fire. To do that, we just ne
             var scene_root = get_tree().root.get_children()[0]
             scene_root.add_child(clone)
 
-            clone.global_transform = get_node("Rotation_helper/Gun_fire_points/Pistol_point").global_transform
+            clone.global_transform = $Rotation_helper/Gun_fire_points/Pistol_point.global_transform
             # The bullet is a little too small (by default), so let's make it bigger!
             clone.scale = Vector3(4, 4, 4)
 
@@ -168,7 +168,7 @@ Now we need to remove a bullet from the gun when we fire. To do that, we just ne
 
         # Rifle bullet handeling: Send a raycast!
         elif current_gun == "RIFLE":
-                var ray = get_node("Rotation_helper/Gun_fire_points/Rifle_point/RayCast")
+                var ray = $Rotation_helper/Gun_fire_points/Rifle_point/RayCast
                 ray.force_raycast_update()
 
                 if ray.is_colliding():
@@ -180,7 +180,7 @@ Now we need to remove a bullet from the gun when we fire. To do that, we just ne
 
         # Knife bullet(?) handeling: Use an area!
         elif current_gun == "KNIFE":
-            var area = get_node("Rotation_helper/Gun_fire_points/Knife_point/Area")
+            var area = $Rotation_helper/Gun_fire_points/Knife_point/Area
             var bodies = area.get_overlapping_bodies()
 
             for body in bodies:
@@ -411,7 +411,7 @@ and insert the following code:
     var audio_node = null
 
     func _ready():
-        audio_node = get_node("AudioStreamPlayer")
+        audio_node = $AudioStreamPlayer
         audio_node.connect("finished", self, "destroy_self")
         audio_node.stop()
 
@@ -541,7 +541,7 @@ when a bullet is fired. Go to ``fire_bullet`` and add the following:
             var scene_root = get_tree().root.get_children()[0]
             scene_root.add_child(clone)
 
-            clone.global_transform = get_node("Rotation_helper/Gun_fire_points/Pistol_point").global_transform
+            clone.global_transform = $Rotation_helper/Gun_fire_points/Pistol_point.global_transform
             # The bullet is a little too small (by default), so let's make it bigger!
             clone.scale = Vector3(4, 4, 4)
 
@@ -550,7 +550,7 @@ when a bullet is fired. Go to ``fire_bullet`` and add the following:
 
         # Rifle bullet handeling: Send a raycast!
         elif current_gun == "RIFLE":
-            var ray = get_node("Rotation_helper/Gun_fire_points/Rifle_point/RayCast")
+            var ray = Rotation_helper/Gun_fire_points/Rifle_point/RayCast
             ray.force_raycast_update()
 
             if ray.is_colliding():
@@ -563,7 +563,7 @@ when a bullet is fired. Go to ``fire_bullet`` and add the following:
 
         # Knife bullet(?) handeling: Use an area!
         elif current_gun == "KNIFE":
-            var area = get_node("Rotation_helper/Gun_fire_points/Knife_point/Area")
+            var area = $Rotation_helper/Gun_fire_points/Knife_point/Area
             var bodies = area.get_overlapping_bodies()
 
             for body in bodies: