make a basic prototype for a scene.

right now theres just a moving ball, inside a box, with a working paddle. i had to make the ball kinematic and tell the ball to bounce when it hits the other direction.

GodotCharacter.cs

@@ -1,16 +0,0 @@
-using Godot;
-
-namespace Pong;
-
-public partial class GodotCharacter : Sprite2D
-{
-	private const double Meter = 10;
-	
-	[Export]
-	private double _moveSpeed;
-
-	public override void _Process(double delta)
-	{
-		Position += Vector2.Right * Meter * _moveSpeed * delta;
-	}
-}

GodotCharacter.tscn

@@ -1,8 +0,0 @@
-[gd_scene load_steps=3 format=3 uid="uid://cnwfyao83u6y5"]
-
-[ext_resource type="Texture2D" uid="uid://b186qihsjblv7" path="res://icon.svg" id="1_hmqt3"]
-[ext_resource type="Script" path="res://GodotCharacter.cs" id="2_006i4"]
-
-[node name="GodotCharacter" type="Sprite2D"]
-texture = ExtResource("1_hmqt3")
-script = ExtResource("2_006i4")

Scenes/Ball.tscn

@@ -0,0 +1,20 @@
+[gd_scene load_steps=4 format=3 uid="uid://cggi01qnnlnwg"]
+
+[ext_resource type="Script" path="res://Scripts/Ball.cs" id="1_474si"]
+
+[sub_resource type="PlaceholderTexture2D" id="PlaceholderTexture2D_yq7ub"]
+size = Vector2(50, 50)
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_i1hik"]
+size = Vector2(50, 50)
+
+[node name="Ball" type="CharacterBody2D"]
+script = ExtResource("1_474si")
+
+[node name="Sprite2D" type="Sprite2D" parent="."]
+position = Vector2(-1, -1)
+texture = SubResource("PlaceholderTexture2D_yq7ub")
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+position = Vector2(-1, -1)
+shape = SubResource("RectangleShape2D_i1hik")

Scenes/Paddle.tscn

@@ -0,0 +1,22 @@
+[gd_scene load_steps=4 format=3 uid="uid://bklo6torhapa0"]
+
+[ext_resource type="Script" path="res://Scripts/Paddle.cs" id="1_uv7s3"]
+[ext_resource type="Texture2D" uid="uid://b186qihsjblv7" path="res://icon.svg" id="2_62eyv"]
+
+[sub_resource type="PhysicsMaterial" id="PhysicsMaterial_r5a55"]
+friction = 0.0
+bounce = 1.0
+
+[node name="Paddle" type="RigidBody2D"]
+physics_material_override = SubResource("PhysicsMaterial_r5a55")
+gravity_scale = 0.0
+lock_rotation = true
+script = ExtResource("1_uv7s3")
+
+[node name="Sprite" type="Sprite2D" parent="."]
+scale = Vector2(0.25, 2)
+texture = ExtResource("2_62eyv")
+
+[node name="CollisionPolygon2D" type="CollisionPolygon2D" parent="."]
+scale = Vector2(0.25, 2)
+polygon = PackedVector2Array(64, -60.8, 64, 59, 59.6, 64, -60.1, 64, -64, 60.7, -64, -59, -59, -63.8, 59.1, -64)

Scenes/Pong.tscn

@@ -0,0 +1,19 @@
+[gd_scene load_steps=4 format=3 uid="uid://kmfgtiugs4m0"]
+
+[ext_resource type="PackedScene" uid="uid://bklo6torhapa0" path="res://Scenes/Paddle.tscn" id="1_5rs0o"]
+[ext_resource type="PackedScene" uid="uid://cggi01qnnlnwg" path="res://Scenes/Ball.tscn" id="2_u2ksv"]
+[ext_resource type="PackedScene" uid="uid://c5n541vsuvfk8" path="res://Scenes/Walls.tscn" id="3_jfis7"]
+
+[node name="Pong" type="Node2D"]
+
+[node name="Paddle" parent="." instance=ExtResource("1_5rs0o")]
+position = Vector2(-350, 0)
+_moveSpeed = 50.0
+
+[node name="Camera2D" type="Camera2D" parent="."]
+position = Vector2(0, -2)
+
+[node name="Ball" parent="." instance=ExtResource("2_u2ksv")]
+_ballSpeed = 50.0
+
+[node name="Walls" parent="." instance=ExtResource("3_jfis7")]

Scenes/Walls.tscn

@@ -0,0 +1,35 @@
+[gd_scene load_steps=4 format=3 uid="uid://c5n541vsuvfk8"]
+
+[sub_resource type="PlaceholderTexture2D" id="PlaceholderTexture2D_f7jy5"]
+size = Vector2(30, 600)
+
+[sub_resource type="PlaceholderTexture2D" id="PlaceholderTexture2D_868ov"]
+size = Vector2(756, 30)
+
+[sub_resource type="PhysicsMaterial" id="PhysicsMaterial_a4dbc"]
+friction = 0.0
+bounce = 1.0
+
+[node name="Walls" type="Node2D"]
+
+[node name="Left" type="Sprite2D" parent="."]
+position = Vector2(-393, -2)
+texture = SubResource("PlaceholderTexture2D_f7jy5")
+
+[node name="Right" type="Sprite2D" parent="."]
+position = Vector2(393, -2)
+texture = SubResource("PlaceholderTexture2D_f7jy5")
+
+[node name="Top" type="Sprite2D" parent="."]
+position = Vector2(0, -287)
+texture = SubResource("PlaceholderTexture2D_868ov")
+
+[node name="Bottom" type="Sprite2D" parent="."]
+position = Vector2(0, 283)
+texture = SubResource("PlaceholderTexture2D_868ov")
+
+[node name="StaticBody2D" type="StaticBody2D" parent="."]
+physics_material_override = SubResource("PhysicsMaterial_a4dbc")
+
+[node name="CollisionPolygon2D" type="CollisionPolygon2D" parent="StaticBody2D"]
+polygon = PackedVector2Array(-408, -302, 408, -302, 408, 298, -408, 298, -408, -301, -378, -272, -378, 268, 378, 268, 378, -272, -378, -272)

Scripts/Ball.cs

@@ -0,0 +1,37 @@
+using Godot;
+
+namespace Pong.Scripts;
+
+public partial class Ball : CharacterBody2D
+{
+	[Export] private double _ballSpeed;
+	
+	private Vector2 _velocity;
+	
+	/// <summary>
+	/// this property multiples the ballSpeed by the Meter constant.
+	/// </summary>
+	private double BallSpeed => _ballSpeed * Constants.Meter;
+	
+	public override void _Ready()
+	{
+		_velocity = Vector2.Left * BallSpeed;
+	}
+
+	public override void _PhysicsProcess(double delta)
+	{
+		Velocity = _velocity;
+		CollisionCheck(delta);
+	}
+
+	/// <summary>
+	/// this method moves the ball and bounces if it collides with something.
+	/// </summary>
+	/// <param name="delta">delta time from the _PhysicsProcess method.</param>
+	private void CollisionCheck(double delta)
+	{
+		var collision = MoveAndCollide(_velocity * delta);
+		if (collision == null) return;
+		_velocity = _velocity.Bounce(collision.GetNormal());
+	}
+}

Scripts/Constants.cs

@@ -0,0 +1,9 @@
+namespace Pong.Scripts;
+
+public static class Constants
+{
+	/// <summary>
+	/// a constant representing 1 Meter in pixels.
+	/// </summary>
+	internal const double Meter = 10;
+}

Scripts/Paddle.cs

@@ -0,0 +1,44 @@
+using Godot;
+
+namespace Pong.Scripts;
+
+public partial class Paddle : RigidBody2D
+{
+	[Export] private double _moveSpeed;
+	
+	private double _verticalInput;
+
+	/// <summary>
+	/// property that multiples the moveSpeed by the Meter constant.
+	/// </summary>
+	private double MoveSpeed => _moveSpeed * Constants.Meter;
+	
+	public override void _Process(double delta)
+	{
+		_verticalInput = GetVerticalInput();
+	}
+
+	public override void _PhysicsProcess(double delta)
+	{
+		LinearVelocity = Vector2.Up * MoveSpeed * _verticalInput;
+	}
+
+	/// <summary>
+	/// a method that returns a number that represents input on the vertical axis.
+	/// </summary>
+	/// <returns>1 for up, -1 for down, 0 for nothing.</returns>
+	private static double GetVerticalInput()
+	{
+		if (Input.IsActionPressed("paddle_up"))
+		{
+			return 1;
+		}
+
+		if (Input.IsActionPressed("paddle_down"))
+		{
+			return -1;
+		}
+
+		return 0;
+	}
+}

pong.tscn

@@ -1,9 +0,0 @@
-[gd_scene load_steps=2 format=3 uid="uid://btnh2d0qsywpt"]
-
-[ext_resource type="PackedScene" uid="uid://cnwfyao83u6y5" path="res://GodotCharacter.tscn" id="1_0pstb"]
-
-[node name="Pong" type="Node2D"]
-
-[node name="GodotCharacter" parent="." instance=ExtResource("1_0pstb")]
-position = Vector2(-2, 0)
-_moveSpeed = 5.0

project.godot

@@ -11,10 +11,15 @@ config_version=5
 [application]
 
 config/name="Pong"
-run/main_scene="res://pong.tscn"
+run/main_scene="res://Scenes/Pong.tscn"
 config/features=PackedStringArray("4.0", "C#", "Double Precision", "Mobile")
 config/icon="res://icon.svg"
 
+[display]
+
+window/size/viewport_width=800
+window/size/viewport_height=600
+
 [dotnet]
 
 project/assembly_name="Pong"
@@ -24,6 +29,21 @@ project/assembly_name="Pong"
 version_control/plugin_name="GitPlugin"
 version_control/autoload_on_startup=true
 
+[input]
+
+paddle_up={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194320,"key_label":0,"unicode":0,"echo":false,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":87,"key_label":0,"unicode":119,"echo":false,"script":null)
+]
+}
+paddle_down={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194322,"key_label":0,"unicode":0,"echo":false,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":83,"key_label":0,"unicode":115,"echo":false,"script":null)
+]
+}
+
 [rendering]
 
 renderer/rendering_method="mobile"