[3.x] Add a 2D version of the dynamic split screen demo (#762)

* add a 2D version of the dynamic split screen demo

* refactor the dynamic split screen demo

 - both 2D and 3D scenes have the exact same hierarchy
 - a single camera_controller.gd script instead of one per mode
 - the third viewport for 2D mode has been removed

viewport/dynamic_split_screen/.gitignore

@@ -0,0 +1 @@
+export/

viewport/dynamic_split_screen/2d/level.tscn

@@ -0,0 +1,531 @@
+[gd_scene load_steps=8 format=2]
+
+[ext_resource path="res://2d/player.gd" type="Script" id=1]
+[ext_resource path="res://2d/wall_coloring.gd" type="Script" id=2]
+[ext_resource path="res://2d/square.png" type="Texture" id=3]
+[ext_resource path="res://2d/player.png" type="Texture" id=4]
+
+[sub_resource type="CircleShape2D" id=3]
+radius = 8.0
+
+[sub_resource type="CircleShape2D" id=4]
+radius = 8.06226
+
+[sub_resource type="RectangleShape2D" id=2]
+extents = Vector2( 8, 8 )
+
+[node name="Level" type="Node2D"]
+
+[node name="Player1" type="KinematicBody2D" parent="."]
+position = Vector2( -36, -16 )
+script = ExtResource( 1 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Player1"]
+shape = SubResource( 3 )
+
+[node name="Sprite" type="Sprite" parent="Player1"]
+modulate = Color( 1, 0, 0, 1 )
+scale = Vector2( 0.25, 0.25 )
+texture = ExtResource( 4 )
+
+[node name="Player2" type="KinematicBody2D" parent="."]
+position = Vector2( 25, 42 )
+script = ExtResource( 1 )
+player_id = 2
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Player2"]
+shape = SubResource( 4 )
+
+[node name="Sprite" type="Sprite" parent="Player2"]
+modulate = Color( 0, 0.588235, 1, 1 )
+scale = Vector2( 0.25, 0.25 )
+texture = ExtResource( 4 )
+
+[node name="Walls" type="Node2D" parent="."]
+script = ExtResource( 2 )
+
+[node name="Group1" type="Node2D" parent="Walls"]
+position = Vector2( 342, -1.00002 )
+rotation = 0.707648
+
+[node name="StaticBody2D" type="StaticBody2D" parent="Walls/Group1"]
+position = Vector2( -68, -17 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group1/StaticBody2D"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group1/StaticBody2D" groups=["walls"]]
+modulate = Color( 0.607891, 0.046592, 0.00570985, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D4" type="StaticBody2D" parent="Walls/Group1"]
+position = Vector2( 52, 29 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group1/StaticBody2D4"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group1/StaticBody2D4" groups=["walls"]]
+modulate = Color( 0.404256, 0.898451, 0.937987, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D2" type="StaticBody2D" parent="Walls/Group1"]
+position = Vector2( -20, 48 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group1/StaticBody2D2"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group1/StaticBody2D2" groups=["walls"]]
+modulate = Color( 0.180765, 0.0852998, 0.0428303, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D3" type="StaticBody2D" parent="Walls/Group1"]
+position = Vector2( 35, -38 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group1/StaticBody2D3"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group1/StaticBody2D3" groups=["walls"]]
+modulate = Color( 0.0991764, 0.976524, 0.341112, 1 )
+texture = ExtResource( 3 )
+
+[node name="Group8" type="Node2D" parent="Walls"]
+position = Vector2( -119, -69 )
+rotation = 0.707648
+
+[node name="StaticBody2D" type="StaticBody2D" parent="Walls/Group8"]
+position = Vector2( -68, -17 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group8/StaticBody2D"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group8/StaticBody2D" groups=["walls"]]
+modulate = Color( 0.607891, 0.046592, 0.00570985, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D4" type="StaticBody2D" parent="Walls/Group8"]
+position = Vector2( 52, 29 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group8/StaticBody2D4"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group8/StaticBody2D4" groups=["walls"]]
+modulate = Color( 0.404256, 0.898451, 0.937987, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D2" type="StaticBody2D" parent="Walls/Group8"]
+position = Vector2( -20, 48 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group8/StaticBody2D2"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group8/StaticBody2D2" groups=["walls"]]
+modulate = Color( 0.180765, 0.0852998, 0.0428303, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D3" type="StaticBody2D" parent="Walls/Group8"]
+position = Vector2( 35, -38 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group8/StaticBody2D3"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group8/StaticBody2D3" groups=["walls"]]
+modulate = Color( 0.0991764, 0.976524, 0.341112, 1 )
+texture = ExtResource( 3 )
+
+[node name="Group6" type="Node2D" parent="Walls"]
+position = Vector2( -12, -162 )
+rotation = -0.472087
+
+[node name="StaticBody2D" type="StaticBody2D" parent="Walls/Group6"]
+position = Vector2( -68, -17 )
+scale = Vector2( 2, 2 )
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+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group6/StaticBody2D"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group6/StaticBody2D" groups=["walls"]]
+modulate = Color( 0.830074, 0.71524, 0.115105, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D4" type="StaticBody2D" parent="Walls/Group6"]
+position = Vector2( 52, 29 )
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+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group6/StaticBody2D4"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group6/StaticBody2D4" groups=["walls"]]
+modulate = Color( 0.86402, 0.891686, 0.747119, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D2" type="StaticBody2D" parent="Walls/Group6"]
+position = Vector2( -20, 48 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group6/StaticBody2D2"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group6/StaticBody2D2" groups=["walls"]]
+modulate = Color( 0.176854, 0.187306, 0.991179, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D3" type="StaticBody2D" parent="Walls/Group6"]
+position = Vector2( 35, -38 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group6/StaticBody2D3"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group6/StaticBody2D3" groups=["walls"]]
+modulate = Color( 0.909202, 0.190021, 0.310404, 1 )
+texture = ExtResource( 3 )
+
+[node name="Group9" type="Node2D" parent="Walls"]
+position = Vector2( 7, 268 )
+rotation = 1.44794
+
+[node name="StaticBody2D" type="StaticBody2D" parent="Walls/Group9"]
+position = Vector2( -68, -17 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group9/StaticBody2D"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group9/StaticBody2D" groups=["walls"]]
+modulate = Color( 0.830074, 0.71524, 0.115105, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D4" type="StaticBody2D" parent="Walls/Group9"]
+position = Vector2( 52, 29 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group9/StaticBody2D4"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group9/StaticBody2D4" groups=["walls"]]
+modulate = Color( 0.86402, 0.891686, 0.747119, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D2" type="StaticBody2D" parent="Walls/Group9"]
+position = Vector2( -20, 48 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group9/StaticBody2D2"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group9/StaticBody2D2" groups=["walls"]]
+modulate = Color( 0.176854, 0.187306, 0.991179, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D3" type="StaticBody2D" parent="Walls/Group9"]
+position = Vector2( 35, -38 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group9/StaticBody2D3"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group9/StaticBody2D3" groups=["walls"]]
+modulate = Color( 0.909202, 0.190021, 0.310404, 1 )
+texture = ExtResource( 3 )
+
+[node name="Group2" type="Node2D" parent="Walls"]
+position = Vector2( 166, 1 )
+rotation = -2.65517
+scale = Vector2( 0.5, 0.5 )
+
+[node name="StaticBody2D" type="StaticBody2D" parent="Walls/Group2"]
+position = Vector2( -68, -17 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group2/StaticBody2D"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group2/StaticBody2D" groups=["walls"]]
+modulate = Color( 0.255383, 0.0261656, 0.866709, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D4" type="StaticBody2D" parent="Walls/Group2"]
+position = Vector2( 52, 29 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group2/StaticBody2D4"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group2/StaticBody2D4" groups=["walls"]]
+modulate = Color( 0.484218, 0.0260328, 0.657083, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D2" type="StaticBody2D" parent="Walls/Group2"]
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+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group2/StaticBody2D2"]
+shape = SubResource( 2 )
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+[node name="Sprite" type="Sprite" parent="Walls/Group2/StaticBody2D2" groups=["walls"]]
+modulate = Color( 0.20515, 0.697483, 0.160248, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D3" type="StaticBody2D" parent="Walls/Group2"]
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+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group2/StaticBody2D3"]
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+[node name="Sprite" type="Sprite" parent="Walls/Group2/StaticBody2D3" groups=["walls"]]
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+texture = ExtResource( 3 )
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+[node name="Group5" type="Node2D" parent="Walls"]
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+scale = Vector2( 0.5, 0.5 )
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+[node name="StaticBody2D" type="StaticBody2D" parent="Walls/Group5"]
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+[node name="StaticBody2D4" type="StaticBody2D" parent="Walls/Group5"]
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+[node name="StaticBody2D3" type="StaticBody2D" parent="Walls/Group5"]
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+texture = ExtResource( 3 )
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+[node name="Group10" type="Node2D" parent="Walls"]
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+[node name="StaticBody2D" type="StaticBody2D" parent="Walls/Group10"]
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+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group7/StaticBody2D2" groups=["walls"]]
+modulate = Color( 0.228981, 0.571434, 0.607728, 1 )
+texture = ExtResource( 3 )
+
+[node name="StaticBody2D3" type="StaticBody2D" parent="Walls/Group7"]
+position = Vector2( 35, -38 )
+scale = Vector2( 2, 2 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Walls/Group7/StaticBody2D3"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Walls/Group7/StaticBody2D3" groups=["walls"]]
+modulate = Color( 0.398647, 0.433863, 0.423729, 1 )
+texture = ExtResource( 3 )

viewport/dynamic_split_screen/2d/player.gd

@@ -0,0 +1,17 @@
+extends KinematicBody2D
+
+
+# Moves the player
+
+export(int, 1, 2) var player_id = 1
+export(float) var walk_speed = 200.0
+
+
+func _physics_process(_delta):
+	var velocity = Vector2.ZERO
+	velocity.y = -Input.get_action_strength("move_up_player" + str(player_id))
+	velocity.y += Input.get_action_strength("move_down_player" + str(player_id))
+	velocity.x = -Input.get_action_strength("move_left_player" + str(player_id))
+	velocity.x += Input.get_action_strength("move_right_player" + str(player_id))
+
+	move_and_slide(velocity.normalized() * walk_speed)

viewport/dynamic_split_screen/2d/player.png.import

@@ -0,0 +1,35 @@
+[remap]
+
+importer="texture"
+type="StreamTexture"
+path="res://.import/player.png-efb1916a0d650384deb4448ddc0269fa.stex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://2d/player.png"
+dest_files=[ "res://.import/player.png-efb1916a0d650384deb4448ddc0269fa.stex" ]
+
+[params]
+
+compress/mode=0
+compress/lossy_quality=0.7
+compress/hdr_mode=0
+compress/bptc_ldr=0
+compress/normal_map=0
+flags/repeat=0
+flags/filter=true
+flags/mipmaps=false
+flags/anisotropic=false
+flags/srgb=2
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/HDR_as_SRGB=false
+process/invert_color=false
+process/normal_map_invert_y=false
+stream=false
+size_limit=0
+detect_3d=true
+svg/scale=1.0

viewport/dynamic_split_screen/2d/split_screen.tscn

@@ -0,0 +1,56 @@
+[gd_scene load_steps=7 format=2]
+
+[ext_resource path="res://camera_controller.gd" type="Script" id=1]
+[ext_resource path="res://split_screen.shader" type="Shader" id=2]
+[ext_resource path="res://icon.png" type="Texture" id=3]
+[ext_resource path="res://exit_to_menu.gd" type="Script" id=4]
+[ext_resource path="res://2d/level.tscn" type="PackedScene" id=5]
+
+[sub_resource type="ShaderMaterial" id=1]
+shader = ExtResource( 2 )
+shader_param/viewport_size = null
+shader_param/split_active = null
+shader_param/player1_position = null
+shader_param/player2_position = null
+shader_param/split_line_thickness = null
+shader_param/split_line_color = null
+
+[node name="Game" type="Node2D"]
+script = ExtResource( 4 )
+
+[node name="SplitScreen" type="Node" parent="."]
+script = ExtResource( 1 )
+max_separation = 100.0
+
+[node name="View" type="TextureRect" parent="SplitScreen"]
+material = SubResource( 1 )
+margin_right = 1024.0
+margin_bottom = 600.0
+texture = ExtResource( 3 )
+expand = true
+
+[node name="Main" type="Viewport" parent="SplitScreen"]
+size = Vector2( 1024, 600 )
+hdr = false
+disable_3d = true
+usage = 0
+render_target_v_flip = true
+render_target_update_mode = 3
+
+[node name="Level" parent="SplitScreen/Main" instance=ExtResource( 5 )]
+
+[node name="Camera" type="Camera2D" parent="SplitScreen/Main"]
+current = true
+zoom = Vector2( 0.2, 0.2 )
+
+[node name="Secondary" type="Viewport" parent="SplitScreen"]
+size = Vector2( 100, 100 )
+hdr = false
+disable_3d = true
+usage = 0
+render_target_v_flip = true
+render_target_update_mode = 3
+
+[node name="Camera" type="Camera2D" parent="SplitScreen/Secondary"]
+current = true
+zoom = Vector2( 0.2, 0.2 )

viewport/dynamic_split_screen/2d/square.png.import

@@ -0,0 +1,35 @@
+[remap]
+
+importer="texture"
+type="StreamTexture"
+path="res://.import/square.png-78c70671391f71adc77019bdb5e7a73b.stex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://2d/square.png"
+dest_files=[ "res://.import/square.png-78c70671391f71adc77019bdb5e7a73b.stex" ]
+
+[params]
+
+compress/mode=0
+compress/lossy_quality=0.7
+compress/hdr_mode=0
+compress/bptc_ldr=0
+compress/normal_map=0
+flags/repeat=0
+flags/filter=true
+flags/mipmaps=false
+flags/anisotropic=false
+flags/srgb=2
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/HDR_as_SRGB=false
+process/invert_color=false
+process/normal_map_invert_y=false
+stream=false
+size_limit=0
+detect_3d=true
+svg/scale=1.0

viewport/dynamic_split_screen/2d/wall_coloring.gd

@@ -0,0 +1,11 @@
+tool
+extends Node2D
+
+# Set a random color to all objects in the "walls" group.
+# To use, attach this script to the "Walls" node.
+
+func _ready():
+	randomize()
+	var walls = get_tree().get_nodes_in_group("walls")
+	for wall in walls:
+		wall.modulate = Color(randf(), randf(), randf())

viewport/dynamic_split_screen/split_screen.tscn → viewport/dynamic_split_screen/3d/level.tscn

@@ -1,19 +1,7 @@
-[gd_scene load_steps=58 format=2]
-
-[ext_resource path="res://default_env.tres" type="Environment" id=1]
-[ext_resource path="res://camera_controller.gd" type="Script" id=2]
-[ext_resource path="res://split_screen.shader" type="Shader" id=3]
-[ext_resource path="res://icon.png" type="Texture" id=4]
-[ext_resource path="res://player.gd" type="Script" id=5]
-
-[sub_resource type="ShaderMaterial" id=1]
-shader = ExtResource( 3 )
-shader_param/viewport_size = null
-shader_param/split_active = null
-shader_param/player1_position = null
-shader_param/player2_position = null
-shader_param/split_line_thickness = null
-shader_param/split_line_color = null
+[gd_scene load_steps=54 format=2]
+
+[ext_resource path="res://3d/player.gd" type="Script" id=1]
+[ext_resource path="res://default_env.tres" type="Environment" id=2]
 
 [sub_resource type="CapsuleMesh" id=2]
 
@@ -164,54 +152,19 @@ albedo_color = Color( 0.770645, 0.287346, 0.739309, 1 )
 [sub_resource type="SpatialMaterial" id=52]
 albedo_color = Color( 0.791675, 0.946163, 0.317723, 1 )
 
-[node name="World" type="Spatial"]
+[node name="Level" type="Spatial"]
 
 [node name="WorldEnvironment" type="WorldEnvironment" parent="."]
-environment = ExtResource( 1 )
+environment = ExtResource( 2 )
 
 [node name="DirectionalLight" type="DirectionalLight" parent="WorldEnvironment"]
 transform = Transform( 1, 0, 0, 0, -0.818651, 0.574291, 0, -0.574291, -0.818651, 0, 70.567, -72.3668 )
 shadow_enabled = true
 shadow_color = Color( 0.6, 0.6, 0.6, 1 )
 
-[node name="Cameras" type="Spatial" parent="."]
-script = ExtResource( 2 )
-
-[node name="View" type="TextureRect" parent="Cameras"]
-material = SubResource( 1 )
-anchor_right = 1.0
-anchor_bottom = 1.0
-texture = ExtResource( 4 )
-expand = true
-__meta__ = {
-"_edit_use_anchors_": false
-}
-
-[node name="Viewport1" type="Viewport" parent="Cameras"]
-size = Vector2( 100, 100 )
-msaa = 2
-usage = 3
-render_target_v_flip = true
-render_target_update_mode = 3
-
-[node name="Camera1" type="Camera" parent="Cameras/Viewport1"]
-transform = Transform( 1, 0, 0, 0, -4.37114e-08, 1, 0, -1, -4.37114e-08, 0, 20, 0 )
-current = true
-
-[node name="Viewport2" type="Viewport" parent="Cameras"]
-size = Vector2( 100, 100 )
-msaa = 2
-usage = 3
-render_target_v_flip = true
-render_target_update_mode = 3
-
-[node name="Camera2" type="Camera" parent="Cameras/Viewport2"]
-transform = Transform( 1, 0, 0, 0, -4.37114e-08, 1, 0, -1, -4.37114e-08, 0, 20, 0 )
-current = true
-
 [node name="Player1" type="KinematicBody" parent="."]
 transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.25, 0 )
-script = ExtResource( 5 )
+script = ExtResource( 1 )
 
 [node name="Mesh" type="MeshInstance" parent="Player1"]
 transform = Transform( 1, 0, 0, 0, -4.37114e-08, -1, 0, 1, -4.37114e-08, 0, 0, 0 )
@@ -224,7 +177,7 @@ shape = SubResource( 4 )
 
 [node name="Player2" type="KinematicBody" parent="."]
 transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 4.18358, 1.25, 3.01882 )
-script = ExtResource( 5 )
+script = ExtResource( 1 )
 player_id = 2
 
 [node name="Mesh" type="MeshInstance" parent="Player2"]

viewport/dynamic_split_screen/player.gd → viewport/dynamic_split_screen/3d/player.gd

@@ -12,6 +12,6 @@ func _physics_process(_delta):
 	velocity.z = -Input.get_action_strength("move_up_player" + str(player_id))
 	velocity.z += Input.get_action_strength("move_down_player" + str(player_id))
 	velocity.x = -Input.get_action_strength("move_left_player" + str(player_id))
-	velocity.x +=  Input.get_action_strength("move_right_player" + str(player_id))
+	velocity.x += Input.get_action_strength("move_right_player" + str(player_id))
 
 	move_and_slide(velocity.normalized() * walk_speed)

viewport/dynamic_split_screen/3d/split_screen.tscn

@@ -0,0 +1,53 @@
+[gd_scene load_steps=7 format=2]
+
+[ext_resource path="res://3d/level.tscn" type="PackedScene" id=1]
+[ext_resource path="res://camera_controller.gd" type="Script" id=2]
+[ext_resource path="res://split_screen.shader" type="Shader" id=3]
+[ext_resource path="res://icon.png" type="Texture" id=4]
+[ext_resource path="res://exit_to_menu.gd" type="Script" id=6]
+
+[sub_resource type="ShaderMaterial" id=1]
+shader = ExtResource( 3 )
+shader_param/viewport_size = null
+shader_param/split_active = null
+shader_param/player1_position = null
+shader_param/player2_position = null
+shader_param/split_line_thickness = null
+shader_param/split_line_color = null
+
+[node name="Game" type="Spatial"]
+script = ExtResource( 6 )
+
+[node name="SplitScreen" type="Node" parent="."]
+script = ExtResource( 2 )
+
+[node name="View" type="TextureRect" parent="SplitScreen"]
+material = SubResource( 1 )
+anchor_right = 1.0
+anchor_bottom = 1.0
+texture = ExtResource( 4 )
+expand = true
+
+[node name="Main" type="Viewport" parent="SplitScreen"]
+size = Vector2( 100, 100 )
+msaa = 2
+usage = 3
+render_target_v_flip = true
+render_target_update_mode = 3
+
+[node name="Level" parent="SplitScreen/Main" instance=ExtResource( 1 )]
+
+[node name="Camera" type="Camera" parent="SplitScreen/Main"]
+transform = Transform( 1, 0, 0, 0, -4.37114e-08, 1, 0, -1, -4.37114e-08, 0, 20, 0 )
+current = true
+
+[node name="Secondary" type="Viewport" parent="SplitScreen"]
+size = Vector2( 100, 100 )
+msaa = 2
+usage = 3
+render_target_v_flip = true
+render_target_update_mode = 3
+
+[node name="Camera" type="Camera" parent="SplitScreen/Secondary"]
+transform = Transform( 1, 0, 0, 0, -4.37114e-08, 1, 0, -1, -4.37114e-08, 0, 20, 0 )
+current = true

viewport/dynamic_split_screen/README.md

@@ -1,26 +1,25 @@
 # Dynamic Split Screen
 
 This sample project showcases an implementation of dynamic
-split screen, also called Voronoi split screen.
+split screen, also called Voronoi split screen, for both 2D and 3D games.
 
 Language: [GDSL](https://docs.godotengine.org/en/latest/tutorials/shaders/shader_reference/shading_language.html) and GDScript
 
 Renderer: GLES 2
 
-Note: An HTML5 export is testable
-[here](https://benjaminnavarro.github.io/godot_dynamic_split_screen/index.html).
+Note: An HTML5 export is testable on [itch.io](https://benjaminnavarro.itch.io/godot-dynamic-split-screen-demo).
 
 Check out this demo on the asset library: https://godotengine.org/asset-library/asset/541
 
 ## Details
 
 A dynamic split screen system displays a single screen when
-the two players are close but a splitted view when they move apart.
+the two players are close but a split view when they move apart.
 
 The splitting line can take any angle depending on the players'
 position, so it won't be either vertical or horizontal.
 
-This system was popularized by the Lego videogames.
+This system was popularized by the Lego video games.
 
 ## How it works
 
@@ -28,8 +27,8 @@ Two cameras are placed inside two separate viewports and their
 texture, as well as some other parameters, are passed to a
 shader attached to a TextureRect filling the whole screen.
 
-The `SplitScreen` shader, with the help of the `CameraController`
-script, chooses wich texture to display on each pixel to
+The `split_screen` shader, with the help of the `camera_controller`
+script, chooses which texture to display on each pixel to
 achieve the effect.
 
 The cameras are placed on the segment joining the two players,
@@ -38,14 +37,26 @@ distance otherwise.
 
 ## How to use it
 
-Open and launch the project inside the Godot engine and then
-you can use WASD keys to move the first player and IJKL keys
-to move the second one.
+Open and launch the project inside the Godot engine, select either the
+2D or the 3D demo from the menu and then use WASD/ZQSD keys
+to move the first player and IJKL/arrows keys to move the
+second one.
+
+While a demo is running, you can press the escape key to get back
+to the menu.
 
 The `Cameras` node has parameters to tune the distance at
 which the screen splits and also the width and color of
-the splitting line.
+the splitting line. The `Adaptive Split Line Thickness` parameter
+select whether the split line has a constant thickness or a dynamic
+one varying depending on the distance between the two players.
 
 ## Screenshots
 
-![Screenshots](screenshots/splitscreen.png)
+### 2D
+
+![Screenshots](screenshots/splitscreen_2d.png)
+
+### 3D
+
+![Screenshots](screenshots/splitscreen_3d.png)

viewport/dynamic_split_screen/camera_controller.gd

@@ -1,47 +1,56 @@
-extends Spatial
+extends Node
 
 
 # Handle the motion of both player cameras as well as communication with the
 # SplitScreen shader to achieve the dynamic split screen effet
 #
-# Cameras are place on the segment joining the two players, either in the middle
-# if players are close enough or at a fixed distance if they are not.
+# Cameras are placed on the segment joining the two players, either in the middle
+# if players are close enough or at a fixed distance from them if they are not.
 # In the first case, both cameras being at the same location, only the view of
 # the first one is used for the entire screen thus allowing the players to play
-# on a unsplit screen.
+# on an unsplit screen.
 # In the second case, the screen is split in two with a line perpendicular to the
-# segement joining the two players.
+# segment joining the two players.
 #
 # The points of customization are:
 #   max_separation: the distance between players at which the view starts to split
 #   split_line_thickness: the thickness of the split line in pixels
 #   split_line_color: color of the split line
 #   adaptive_split_line_thickness: if true, the split line thickness will vary
-#       depending on the distance between players. If false, the thickness will
-#       be constant and equal to split_line_thickness
+#       depending on the distance between players, with a maximum of
+#       split_line_thickness. If false, the thickness will be constant and equal
+#       to split_line_thickness.
+
+
+enum Mode {
+	Mode2D,
+	Mode3D
+}
 
 export(float) var max_separation = 20.0
 export(float) var split_line_thickness = 3.0
 export(Color, RGBA) var split_line_color = Color.black
 export(bool) var adaptive_split_line_thickness = true
 
-onready var player1 = $"../Player1"
-onready var player2 = $"../Player2"
+onready var main_viewport = $Main
+onready var secondary_viewport = $Secondary
+onready var level = main_viewport.get_node(@"Level")
+onready var player1 = level.get_node(@"Player1")
+onready var player2 = level.get_node(@"Player2")
 onready var view = $View
-onready var viewport1 = $Viewport1
-onready var viewport2 = $Viewport2
-onready var camera1 = viewport1.get_node(@"Camera1")
-onready var camera2 = viewport2.get_node(@"Camera2")
-
+onready var camera1 = main_viewport.get_node(@"Camera")
+onready var camera2 = secondary_viewport.get_node(@"Camera")
+onready var mode = Mode.Mode2D if camera1 is Camera2D else Mode.Mode3D
 
 func _ready():
+	secondary_viewport.world_2d = main_viewport.world_2d
 	_on_size_changed()
 	_update_splitscreen()
 
 	get_viewport().connect("size_changed", self, "_on_size_changed")
 
-	view.material.set_shader_param("viewport1", viewport1.get_texture())
-	view.material.set_shader_param("viewport2", viewport2.get_texture())
+	view.material.set_shader_param("viewport1", main_viewport.get_texture())
+	view.material.set_shader_param("viewport2", secondary_viewport.get_texture())
 
 
 func _process(_delta):
@@ -56,24 +65,38 @@ func _move_cameras():
 
 	position_difference = position_difference.normalized() * distance
 
-	camera1.translation.x = player1.translation.x + position_difference.x / 2.0
-	camera1.translation.z = player1.translation.z + position_difference.z / 2.0
+	match mode:
+		Mode.Mode2D:
+			camera1.position = player1.position + position_difference / 2.0
+			camera2.position = player2.position - position_difference / 2.0
+		Mode.Mode3D:
+			camera1.translation.x = player1.translation.x + position_difference.x / 2.0
+			camera1.translation.z = player1.translation.z + position_difference.z / 2.0
 
-	camera2.translation.x = player2.translation.x - position_difference.x / 2.0
-	camera2.translation.z = player2.translation.z - position_difference.z / 2.0
+			camera2.translation.x = player2.translation.x - position_difference.x / 2.0
+			camera2.translation.z = player2.translation.z - position_difference.z / 2.0
 
 
 func _update_splitscreen():
 	var screen_size = get_viewport().get_visible_rect().size
-	var player1_position = camera1.unproject_position(player1.translation) / screen_size
-	var player2_position = camera2.unproject_position(player2.translation) / screen_size
+	var player1_position
+	var player2_position
+
+	match mode:
+		Mode.Mode2D:
+			player1_position = (player1.position - camera1.position) / (camera1.zoom * screen_size) + Vector2(0.5, 0.5)
+			player2_position = (player2.position - camera2.position) / (camera2.zoom * screen_size) + Vector2(0.5, 0.5)
+		Mode.Mode3D:
+			player1_position = camera1.unproject_position(player1.translation) / screen_size
+			player2_position = camera2.unproject_position(player2.translation) / screen_size
 
 	var thickness
 	if adaptive_split_line_thickness:
 		var position_difference = _compute_position_difference_in_world()
 		var distance = _compute_horizontal_length(position_difference)
 		thickness = lerp(0, split_line_thickness, (distance - max_separation) / max_separation)
-		thickness = clamp(thickness, 0, split_line_thickness)
+		if thickness > 0:
+			thickness = clamp(thickness, 1, split_line_thickness)
 	else:
 		thickness = split_line_thickness
 
@@ -85,7 +108,7 @@ func _update_splitscreen():
 
 
 # Split screen is active if players are too far apart from each other.
-# Only the horizontal components (x, z) are used for distance computation
+# Only the horizontal components (x/z in 3D, x/y in 2D) are used for distance computation
 func _get_split_state():
 	var position_difference = _compute_position_difference_in_world()
 	var separation_distance = _compute_horizontal_length(position_difference)
@@ -95,15 +118,15 @@ func _get_split_state():
 func _on_size_changed():
 	var screen_size = get_viewport().get_visible_rect().size
 
-	$Viewport1.size = screen_size
-	$Viewport2.size = screen_size
+	main_viewport.size = screen_size
+	secondary_viewport.size = screen_size
 
 	view.material.set_shader_param("viewport_size", screen_size)
 
 
 func _compute_position_difference_in_world():
-	return player2.translation - player1.translation
+	return player2.position - player1.position if mode == Mode.Mode2D else player2.translation - player1.translation
 
 
 func _compute_horizontal_length(vec):
-	return Vector2(vec.x, vec.z).length()
+	return Vector2(vec.x, vec.y).length() if mode == Mode.Mode2D else Vector2(vec.x, vec.z).length()

viewport/dynamic_split_screen/exit_to_menu.gd

@@ -0,0 +1,6 @@
+extends Node
+
+
+func _process(_delta):
+	if Input.is_action_just_pressed("ui_cancel"):
+		get_tree().change_scene("res://menu.tscn")

viewport/dynamic_split_screen/menu.gd

@@ -0,0 +1,8 @@
+extends Control
+
+func _load_2d_demo():
+	get_tree().change_scene("res://2d/split_screen.tscn")
+
+
+func _load_3d_demo():
+	get_tree().change_scene("res://3d/split_screen.tscn")

viewport/dynamic_split_screen/menu.tscn

@@ -0,0 +1,56 @@
+[gd_scene load_steps=5 format=2]
+
+[ext_resource path="res://noto_sans_ui_regular.ttf" type="DynamicFontData" id=1]
+[ext_resource path="res://menu.gd" type="Script" id=2]
+
+[sub_resource type="DynamicFont" id=1]
+size = 45
+font_data = ExtResource( 1 )
+
+[sub_resource type="Theme" id=2]
+default_font = SubResource( 1 )
+
+[node name="Menu" type="Control"]
+anchor_right = 1.0
+anchor_bottom = 1.0
+rect_rotation = -0.0105554
+theme = SubResource( 2 )
+script = ExtResource( 2 )
+
+[node name="CenterContainer" type="CenterContainer" parent="."]
+anchor_right = 1.0
+anchor_bottom = 1.0
+
+[node name="VBoxContainer" type="VBoxContainer" parent="CenterContainer"]
+margin_left = 112.0
+margin_top = 152.0
+margin_right = 912.0
+margin_bottom = 448.0
+
+[node name="Label" type="Label" parent="CenterContainer/VBoxContainer"]
+margin_right = 800.0
+margin_bottom = 150.0
+rect_min_size = Vector2( 800, 150 )
+custom_colors/font_color = Color( 0.290196, 0.290196, 0.290196, 1 )
+text = "Dynamic Split Screen"
+align = 1
+valign = 1
+
+[node name="StartButtons" type="VBoxContainer" parent="CenterContainer/VBoxContainer"]
+margin_top = 154.0
+margin_right = 800.0
+margin_bottom = 296.0
+
+[node name="Start2D" type="Button" parent="CenterContainer/VBoxContainer/StartButtons"]
+margin_right = 800.0
+margin_bottom = 69.0
+text = "Start 2D demo"
+
+[node name="Start3D" type="Button" parent="CenterContainer/VBoxContainer/StartButtons"]
+margin_top = 73.0
+margin_right = 800.0
+margin_bottom = 142.0
+text = "Start 3D demo"
+
+[connection signal="pressed" from="CenterContainer/VBoxContainer/StartButtons/Start2D" to="." method="_load_2d_demo"]
+[connection signal="pressed" from="CenterContainer/VBoxContainer/StartButtons/Start3D" to="." method="_load_3d_demo"]

viewport/dynamic_split_screen/project.godot

@@ -13,7 +13,7 @@ config_version=4
 config/name="Dynamic Split Screen"
 config/description="This sample project showcases an implementation of dynamic
 split screen, also called Voronoi split screen, using GDSL."
-run/main_scene="res://split_screen.tscn"
+run/main_scene="res://menu.tscn"
 config/icon="res://icon.png"
 
 [debug]