make a main menu and score system

i added a main menu scene and a score system that is written in GDScript instead of C# for a change. the WallManager, the thing that detects collisions, calls the score method on the ScoreManager.

Scenes/MainMenu.tscn

@@ -0,0 +1,29 @@
+[gd_scene load_steps=3 format=3 uid="uid://0vkrkvlevwkj"]
+
+[ext_resource type="Script" path="res://Scripts/Managers/MainMenuManager.cs" id="1_tuygx"]
+
+[sub_resource type="LabelSettings" id="LabelSettings_vv6u3"]
+font_size = 64
+
+[node name="MainMenu" type="VBoxContainer"]
+offset_right = 800.0
+offset_bottom = 600.0
+size_flags_horizontal = 3
+size_flags_vertical = 3
+script = ExtResource("1_tuygx")
+
+[node name="Label" type="Label" parent="."]
+layout_mode = 2
+text = "Pong
+"
+label_settings = SubResource("LabelSettings_vv6u3")
+horizontal_alignment = 1
+vertical_alignment = 1
+
+[node name="Button" type="Button" parent="."]
+layout_mode = 2
+theme_override_font_sizes/font_size = 32
+text = "Play
+"
+
+[connection signal="pressed" from="Button" to="." method="OnButtonPressed"]

Scenes/Pong.tscn

@@ -1,7 +1,8 @@
-[gd_scene load_steps=6 format=3 uid="uid://wn48xnd0lstq"]
+[gd_scene load_steps=7 format=3 uid="uid://wn48xnd0lstq"]
 
 [ext_resource type="PackedScene" path="res://Scenes/Paddle.tscn" id="1_5rs0o"]
 [ext_resource type="Script" path="res://Scripts/Managers/SceneManager.cs" id="1_m8437"]
+[ext_resource type="PackedScene" uid="uid://co2rv0nci8sbm" path="res://Scenes/Score.tscn" id="2_f3jwj"]
 [ext_resource type="PackedScene" uid="uid://67qguep14iko" path="res://Scenes/Ball.tscn" id="2_u2ksv"]
 [ext_resource type="PackedScene" uid="uid://dsvv7vqonylr1" path="res://Scenes/Walls.tscn" id="3_jfis7"]
 [ext_resource type="PackedScene" path="res://Scenes/Enemy.tscn" id="4_uwvof"]
@@ -9,6 +10,8 @@
 [node name="Pong" type="Node2D"]
 script = ExtResource("1_m8437")
 
+[node name="Score" parent="." instance=ExtResource("2_f3jwj")]
+
 [node name="Paddle" parent="." instance=ExtResource("1_5rs0o")]
 position = Vector2(-350, 0)
 _moveSpeed = 50.0

Scenes/Score.tscn

@@ -0,0 +1,30 @@
+[gd_scene load_steps=3 format=3 uid="uid://co2rv0nci8sbm"]
+
+[ext_resource type="Script" path="res://Scripts/Managers/ScoreManager.gd" id="1_bdtqr"]
+
+[sub_resource type="LabelSettings" id="LabelSettings_piogj"]
+font_size = 64
+
+[node name="Score" type="HFlowContainer"]
+z_index = 1
+offset_left = -378.0
+offset_top = -272.0
+offset_right = 378.0
+offset_bottom = 268.0
+script = ExtResource("1_bdtqr")
+
+[node name="Player1" type="Label" parent="."]
+layout_mode = 2
+size_flags_horizontal = 3
+text = "0
+"
+label_settings = SubResource("LabelSettings_piogj")
+vertical_alignment = 1
+
+[node name="Player2" type="Label" parent="."]
+layout_mode = 2
+size_flags_horizontal = 3
+text = "0"
+label_settings = SubResource("LabelSettings_piogj")
+horizontal_alignment = 2
+vertical_alignment = 1

Scenes/Walls.tscn

@@ -3,28 +3,30 @@
 [ext_resource type="Script" path="res://Scripts/Managers/WallManager.cs" id="1_mxer2"]
 
 [sub_resource type="PlaceholderTexture2D" id="PlaceholderTexture2D_f7jy5"]
-size = Vector2(30, 600)
+size = Vector2(30, 1)
 
 [sub_resource type="RectangleShape2D" id="RectangleShape2D_1mqst"]
-size = Vector2(30, 600)
+size = Vector2(30, 1)
 
 [sub_resource type="RectangleShape2D" id="RectangleShape2D_sip7s"]
-size = Vector2(30, 600)
+size = Vector2(30, 1)
 
 [sub_resource type="PlaceholderTexture2D" id="PlaceholderTexture2D_868ov"]
-size = Vector2(756, 30)
+size = Vector2(1, 30)
 
 [sub_resource type="RectangleShape2D" id="RectangleShape2D_rw4mt"]
-size = Vector2(756, 30)
+size = Vector2(1, 30)
 
 [sub_resource type="RectangleShape2D" id="RectangleShape2D_dydpt"]
-size = Vector2(756, 30)
+size = Vector2(1, 30)
 
 [node name="Walls" type="Node2D"]
 
 [node name="Left" type="Area2D" parent="."]
 position = Vector2(-393, -2)
+scale = Vector2(1, 600)
 script = ExtResource("1_mxer2")
+PlayerNumber = 1
 
 [node name="Left" type="Sprite2D" parent="Left"]
 position = Vector2(2.08165e-12, 2.08165e-12)
@@ -36,6 +38,7 @@ shape = SubResource("RectangleShape2D_1mqst")
 
 [node name="Right" type="Area2D" parent="."]
 position = Vector2(393, -2)
+scale = Vector2(1, 600)
 script = ExtResource("1_mxer2")
 
 [node name="Right" type="Sprite2D" parent="Right"]
@@ -48,6 +51,7 @@ shape = SubResource("RectangleShape2D_sip7s")
 
 [node name="Top" type="StaticBody2D" parent="."]
 position = Vector2(2.08165e-12, -287)
+scale = Vector2(756, 1)
 collision_layer = 2
 collision_mask = 2
 
@@ -61,6 +65,7 @@ shape = SubResource("RectangleShape2D_rw4mt")
 
 [node name="Bottom" type="StaticBody2D" parent="."]
 position = Vector2(2.08165e-12, 283)
+scale = Vector2(756, 1)
 collision_layer = 2
 collision_mask = 2
 
@@ -71,3 +76,6 @@ texture = SubResource("PlaceholderTexture2D_868ov")
 [node name="CollisionShape2D" type="CollisionShape2D" parent="Bottom"]
 position = Vector2(-2.08165e-12, 0)
 shape = SubResource("RectangleShape2D_dydpt")
+
+[connection signal="body_entered" from="Left" to="Left" method="OnBodyEntered"]
+[connection signal="body_entered" from="Right" to="Right" method="OnBodyEntered"]

Scripts/Data/PlayerNumber.cs

@@ -0,0 +1,7 @@
+namespace Pong.Scripts.Data;
+
+public enum PlayerNumber
+{
+	PlayerOne,
+	PlayerTwo
+}

Scripts/Managers/MainMenuManager.cs

@@ -0,0 +1,28 @@
+using Godot;
+
+namespace Pong.Scripts.Managers;
+
+public partial class MainMenuManager : VBoxContainer
+{
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+		GetTree().Root.SizeChanged += AdaptUiToScreenResolution;
+		AdaptUiToScreenResolution();
+	}
+
+	/// <summary>
+	/// code that executes when the start button is pressed. this loads the Pong scene to the root
+	/// of the scene tree.
+	/// </summary>
+	private void OnButtonPressed()
+	{
+		GetTree().Root.SizeChanged -= AdaptUiToScreenResolution;
+		GetTree().ChangeSceneToFile("res://Scenes/Pong.tscn");
+	}
+
+	private void AdaptUiToScreenResolution()
+	{
+		Size = DisplayServer.WindowGetSize();
+	}
+}

Scripts/Managers/ScoreManager.gd

@@ -0,0 +1,34 @@
+extends HFlowContainer
+
+var PlayerOneScore: int
+var PlayerTwoScore: int
+
+var PlayerOneLabel: Label
+var PlayerTwoLabel: Label
+
+enum {PlayerOne, PlayerTwo}
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	PlayerOneLabel = get_node("Player1")
+	PlayerTwoLabel = get_node("Player2")
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(_delta):
+	pass
+
+## when the ball collides with the wall, this method is called by the WallManager
+func score(player_number: int):
+	if player_number == PlayerOne:
+		PlayerOneScore += 1
+		update_label(player_number)
+	elif player_number == PlayerTwo:
+		PlayerTwoScore += 1
+		update_label(player_number)
+
+## this method takes care of updating labels
+func update_label(player_number: int):
+	if player_number == PlayerOne:
+		PlayerOneLabel.text = str(PlayerOneScore)
+	elif player_number == PlayerTwo:
+		PlayerTwoLabel.text = str(PlayerTwoScore)

Scripts/Managers/WallManager.cs

@@ -1,17 +1,29 @@
 using Godot;
+using Pong.Scripts.Data;
 
 namespace Pong.Scripts.Managers;
 
 public partial class WallManager : Area2D
 {
+	[Export] internal PlayerNumber PlayerNumber;
+
+	private GodotObject _scoreManager;
+	private StringName _score = "score"; 
+
 	public override void _Ready()
 	{
-		BodyEntered += OnBodyEntered;
+		_scoreManager = GetNode<GodotObject>("/root/Pong/Score");
 	}
 
+	/// <summary>
+	/// code that runs when a ball collides the wall.
+	/// </summary>
+	/// <param name="body">the body of the collider.</param>
 	private void OnBodyEntered(Node2D body)
 	{
 		if (body is not Nodes.Ball ball) return;
+		_scoreManager.Call(_score, (long)PlayerNumber);
+		
 		ResetBall(ball);
 	}
 

project.godot

@@ -11,7 +11,7 @@ config_version=5
 [application]
 
 config/name="Pong"
-run/main_scene="res://Scenes/Pong.tscn"
+run/main_scene="res://Scenes/MainMenu.tscn"
 config/features=PackedStringArray("4.0", "C#", "Double Precision", "Mobile")
 config/icon="res://icon.svg"