Update 3D in 2D demo to Godot 3.1.2

viewport/3d_in_2d/3d_in_2d.gd

@@ -1,38 +1,37 @@
 extends Node2D
 
-# Member variables
-var viewport = null
-var sprite = null
-var viewport_sprite = null
-
-var viewport_initial_size = Vector2()
-
-# variables for the sprite animation
+# These first 3 members are for the sprite animation.
 const MAX_FRAME_FOR_SPRITE = 4
 const FRAME_SWITCH_TIME = 0.2
+
 var frame_switch_timer = 0
+var viewport_initial_size = Vector2()
+
+onready var viewport = $Viewport
+onready var sprite = $Sprite2D
+onready var viewport_sprite = $ViewportSprite
 
 func _ready():
+	# We want Godot to load everything but be hidden for a bit.
+	viewport_sprite.modulate = Color(1, 1, 1, 0.01)
+	#warning-ignore:return_value_discarded
 	get_viewport().connect("size_changed", self, "_root_viewport_size_changed")
-
-	viewport = get_node("Viewport")
-	sprite = get_node("Sprite")
-	viewport_sprite = get_node("Viewport_Sprite")
-
 	viewport_initial_size = viewport.size
 
-	# Assign the sprite's texture to the viewport texture
+	# Assign the sprite's texture to the viewport texture.
 	viewport.set_clear_mode(Viewport.CLEAR_MODE_ONLY_NEXT_FRAME)
 
-	# Let two frames pass to make sure the screen was captured
+	# Let two frames pass to make sure the screen was captured.
 	yield(get_tree(), "idle_frame")
 	yield(get_tree(), "idle_frame")
 	viewport_sprite.texture = viewport.get_texture()
-
-	set_process(true)
+	# Hide a little bit longer just in case.
+	for _unused in range(50):
+		yield(get_tree(), "idle_frame")
+	viewport_sprite.modulate = Color.white # Default modulate color.
 
 
-# Simple frame-based animation
+# Simple frame-based animation.
 func _process(delta):
 	frame_switch_timer += delta
 	if frame_switch_timer >= FRAME_SWITCH_TIME:
@@ -41,6 +40,7 @@ func _process(delta):
 	if sprite.frame > MAX_FRAME_FOR_SPRITE:
 		sprite.frame = 0
 
+
 # Called when the root's viewport size changes (i.e. when the window is resized).
 # This is done to handle multiple resolutions without losing quality.
 func _root_viewport_size_changed():

viewport/3d_in_2d/3d_in_2d.tscn

@@ -1,13 +1,13 @@
 [gd_scene load_steps=4 format=2]
 
-[ext_resource path="res://player.scn" type="PackedScene" id=1]
+[ext_resource path="res://3d_in_2d.gd" type="Script" id=1]
 [ext_resource path="res://robot_demo.png" type="Texture" id=2]
-[ext_resource path="res://3D_in_2D.gd" type="Script" id=3]
+[ext_resource path="res://robot_3d.tscn" type="PackedScene" id=3]
 
-[node name="3D_in_2D" type="Node2D"]
-script = ExtResource( 3 )
+[node name="3Din2D" type="Node2D"]
+script = ExtResource( 1 )
 
-[node name="Sprite" type="Sprite" parent="."]
+[node name="Sprite2D" type="Sprite" parent="."]
 position = Vector2( 339.942, 311.204 )
 scale = Vector2( 3, 3 )
 texture = ExtResource( 2 )
@@ -15,7 +15,7 @@ vframes = 2
 hframes = 16
 frame = 4
 
-[node name="Viewport_Sprite" type="Sprite" parent="."]
+[node name="ViewportSprite" type="Sprite" parent="."]
 position = Vector2( 600, 320 )
 rotation = 3.14159
 
@@ -27,13 +27,8 @@ msaa = 2
 hdr = false
 usage = 3
 
-[node name="player" parent="Viewport" instance=ExtResource( 1 )]
-
-[node name="Camera" parent="Viewport/player" index="1"]
-current = true
+[node name="Robot3D" parent="Viewport" instance=ExtResource( 3 )]
 
 [node name="Camera2D" type="Camera2D" parent="."]
 offset = Vector2( 512, 300 )
 current = true
-
-[editable path="Viewport/player"]

viewport/3d_in_2d/player.gd

@@ -1,14 +0,0 @@
-extends KinematicBody
-
-# A simple program to rotate the model around
-
-var model = null
-const SPEED = 40
-
-func _ready():
-	model = get_node("Armature")
-	set_process(true)
-
-
-func _process(delta):
-	model.rotation_degrees.y += delta * SPEED

viewport/3d_in_2d/project.godot

@@ -16,7 +16,7 @@ _global_script_class_icons={
 [application]
 
 config/name="3D in 2D"
-run/main_scene="res://3D_in_2D.tscn"
+run/main_scene="res://3d_in_2d.tscn"
 config/icon="res://icon.png"
 
 [display]

viewport/3d_in_2d/robot_3d.gd

@@ -0,0 +1,8 @@
+extends KinematicBody
+
+# A simple script to rotate the model.
+onready var model = $Armature
+const SPEED = 40
+
+func _process(delta):
+	model.rotation_degrees.y += delta * SPEED