.

DoomDeathmatch/DoomDeathmatch.csproj

@@ -10,4 +10,8 @@
       <ProjectReference Include="..\Engine\Engine.csproj" />
     </ItemGroup>
 
+    <ItemGroup>
+      <Folder Include="src\Scene\Play\" />
+    </ItemGroup>
+
 </Project>

DoomDeathmatch/asset/model/test2.obj

@@ -0,0 +1,44 @@
+# Blender 4.2.3 LTS
+# www.blender.org
+o Cube
+v -1.000000 -1.000000 1.000000
+v -1.000000 1.000000 1.000000
+v -1.000000 -1.000000 -1.000000
+v -1.000000 1.000000 -1.000000
+v 1.000000 -1.000000 1.000000
+v 1.000000 1.000000 1.000000
+v 1.000000 -1.000000 -1.000000
+v 1.000000 1.000000 -1.000000
+vn -1.0000 -0.0000 -0.0000
+vn -0.0000 -0.0000 -1.0000
+vn 1.0000 -0.0000 -0.0000
+vn -0.0000 -0.0000 1.0000
+vn -0.0000 -1.0000 -0.0000
+vn -0.0000 1.0000 -0.0000
+vt 0.625000 0.000000
+vt 0.375000 0.250000
+vt 0.375000 0.000000
+vt 0.625000 0.250000
+vt 0.375000 0.500000
+vt 0.625000 0.500000
+vt 0.375000 0.750000
+vt 0.625000 0.750000
+vt 0.375000 1.000000
+vt 0.125000 0.750000
+vt 0.125000 0.500000
+vt 0.875000 0.500000
+vt 0.625000 1.000000
+vt 0.875000 0.750000
+s 0
+f 2/1/1 3/2/1 1/3/1
+f 4/4/2 7/5/2 3/2/2
+f 8/6/3 5/7/3 7/5/3
+f 6/8/4 1/9/4 5/7/4
+f 7/5/5 1/10/5 3/11/5
+f 4/12/6 6/8/6 8/6/6
+f 2/1/1 4/4/1 3/2/1
+f 4/4/2 8/6/2 7/5/2
+f 8/6/3 6/8/3 5/7/3
+f 6/8/4 2/13/4 1/9/4
+f 7/5/5 5/7/5 1/10/5
+f 4/12/6 2/14/6 6/8/6

DoomDeathmatch/asset/model/test3.obj

@@ -0,0 +1,38 @@
+# Blender 4.2.3 LTS
+# www.blender.org
+o Cube
+v -1.000000 -1.000000 1.000000
+v -1.000000 1.000000 1.000000
+v -1.000000 -1.000000 -1.000000
+v -1.000000 1.000000 -1.000000
+v 1.000000 -1.000000 1.000000
+v 1.000000 1.000000 1.000000
+v 1.000000 -1.000000 -1.000000
+v 1.000000 1.000000 -1.000000
+vt 0.625000 0.000000
+vt 0.375000 0.250000
+vt 0.375000 0.000000
+vt 0.625000 0.250000
+vt 0.375000 0.500000
+vt 0.625000 0.500000
+vt 0.375000 0.750000
+vt 0.625000 0.750000
+vt 0.375000 1.000000
+vt 0.125000 0.750000
+vt 0.125000 0.500000
+vt 0.875000 0.500000
+vt 0.625000 1.000000
+vt 0.875000 0.750000
+s 0
+f 2/1 3/2 1/3
+f 4/4 7/5 3/2
+f 8/6 5/7 7/5
+f 6/8 1/9 5/7
+f 7/5 1/10 3/11
+f 4/12 6/8 8/6
+f 2/1 4/4 3/2
+f 4/4 8/6 7/5
+f 8/6 6/8 5/7
+f 6/8 2/13 1/9
+f 7/5 5/7 1/10
+f 4/12 2/14 6/8

DoomDeathmatch/asset/model/test4.obj

@@ -0,0 +1,24 @@
+# Blender 4.2.3 LTS
+# www.blender.org
+o Cube
+v -1.000000 -1.000000 1.000000
+v -1.000000 1.000000 1.000000
+v -1.000000 -1.000000 -1.000000
+v -1.000000 1.000000 -1.000000
+v 1.000000 -1.000000 1.000000
+v 1.000000 1.000000 1.000000
+v 1.000000 -1.000000 -1.000000
+v 1.000000 1.000000 -1.000000
+s 0
+f 2 3 1
+f 4 7 3
+f 8 5 7
+f 6 1 5
+f 7 1 3
+f 4 6 8
+f 2 4 3
+f 4 8 7
+f 8 6 5
+f 6 2 1
+f 7 5 1
+f 4 2 6

DoomDeathmatch/src/Component/BillboardComponent.cs

@@ -0,0 +1,41 @@
+using Engine.Scene.Component.BuiltIn;
+using OpenTK.Mathematics;
+
+namespace DoomDeathmatch.Component;
+
+public class BillboardComponent : Engine.Scene.Component.Component
+{
+  public Transform? Target { get; set; }
+  public Vector3 Up { get; set; } = Vector3.UnitZ;
+
+  public override void Update(double parDeltaTime)
+  {
+    if (Target == null)
+    {
+      return;
+    }
+
+    var targetPosition = Target.TransformMatrix.ExtractTranslation();
+    var currentPosition = GameObject.Transform.Translation;
+
+    var forward = targetPosition - currentPosition;
+    if (forward.LengthSquared > 0)
+      forward.Normalize();
+
+    var right = Vector3.Cross(Up, forward);
+    if (right.LengthSquared > 0)
+      right.Normalize();
+
+    var recalculatedUp = Vector3.Cross(forward, right);
+
+    var rotationMatrix = new Matrix3(
+      right.X, recalculatedUp.X, forward.X,
+      right.Y, recalculatedUp.Y, forward.Y,
+      right.Z, recalculatedUp.Z, forward.Z
+    );
+
+    var rotation = Quaternion.FromMatrix(rotationMatrix);
+
+    GameObject.Transform.Rotation = rotation;
+  }
+}

DoomDeathmatch/src/Component/ControllerComponent.cs

@@ -6,28 +6,51 @@ namespace DoomDeathmatch.Component;
 public class ControllerComponent : Engine.Scene.Component.Component
 {
   public float Speed { get; set; } = 10.0f;
+  public float RotationSpeed { get; set; } = 70.0f;
 
   private readonly IInputHandler _inputHandler = Engine.Engine.Instance.InputHandler!;
+  private RigidbodyComponent _rigidbody;
+
+  public override void Awake()
+  {
+    _rigidbody = GameObject.GetComponent<RigidbodyComponent>()!;
+  }
 
   public override void Update(double parDeltaTime)
   {
     var movement = Vector3.Zero;
+    var rotation = 0.0f;
+
     if (_inputHandler.IsKeyPressed(KeyboardButtonCode.W))
-      movement.Z += 1;
+      movement.Y += 1;
     if (_inputHandler.IsKeyPressed(KeyboardButtonCode.S))
-      movement.Z -= 1;
-    if (_inputHandler.IsKeyPressed(KeyboardButtonCode.A))
-      movement.X -= 1;
+      movement.Y -= 1;
     if (_inputHandler.IsKeyPressed(KeyboardButtonCode.D))
       movement.X += 1;
-    if (_inputHandler.IsKeyPressed(KeyboardButtonCode.Space))
-      movement.Y += 1;
-    if (_inputHandler.IsKeyPressed(KeyboardButtonCode.Shift))
-      movement.Y -= 1;
+    if (_inputHandler.IsKeyPressed(KeyboardButtonCode.A))
+      movement.X -= 1;
+
+    if (_inputHandler.IsKeyPressed(KeyboardButtonCode.Q))
+      rotation += RotationSpeed;
+    if (_inputHandler.IsKeyPressed(KeyboardButtonCode.E))
+      rotation -= RotationSpeed;
 
     if (movement.LengthSquared > 0)
+    {
       movement.Normalize();
+      movement = GameObject.Transform.Rotation * movement;
 
-    GameObject.Transform.Translation += movement * Speed * (float)parDeltaTime;
+      _rigidbody.AddVelocity(Speed * movement);
+    }
+
+    var velocityXy = _rigidbody.Velocity.Xy;
+    if (velocityXy.LengthSquared > Speed * Speed)
+    {
+      var length = velocityXy.Length;
+      _rigidbody.AddVelocity(new Vector3(-(length - Speed) / length * velocityXy));
+    }
+
+    GameObject.Transform.Rotation *= Quaternion.FromAxisAngle(Vector3.UnitZ, MathHelper.DegreesToRadians(rotation) *
+                                                                             (float)parDeltaTime);
   }
 }

DoomDeathmatch/src/Component/DragComponent.cs

@@ -0,0 +1,21 @@
+using OpenTK.Mathematics;
+
+namespace DoomDeathmatch.Component;
+
+public class DragComponent : Engine.Scene.Component.Component
+{
+  public float Drag { get; set; } = 1f;
+  public Vector3 Coefficient { get; set; } = Vector3.One;
+
+  private RigidbodyComponent _rigidbody;
+
+  public override void Awake()
+  {
+    _rigidbody = GameObject.GetComponent<RigidbodyComponent>()!;
+  }
+
+  public override void Update(double parDeltaTime)
+  {
+    _rigidbody.AddForce(-Drag * (_rigidbody.Velocity * Coefficient));
+  }
+}

DoomDeathmatch/src/Component/GravityComponent.cs

@@ -0,0 +1,44 @@
+using OpenTK.Mathematics;
+
+namespace DoomDeathmatch.Component;
+
+public class GravityComponent : Engine.Scene.Component.Component
+{
+  public float Strength { get; set; } = 10.0f;
+
+  public Vector3 Direction
+  {
+    get => _direction;
+    set => _direction = value.Normalized();
+  }
+
+  public float Floor { get; set; } = 5.0f;
+
+  public bool IsInAir { get; private set; } = false;
+
+  private RigidbodyComponent _rigidbody;
+  private Vector3 _direction = -Vector3.UnitZ;
+
+  public override void Awake()
+  {
+    _rigidbody = GameObject.GetComponent<RigidbodyComponent>()!;
+  }
+
+  public override void Update(double parDeltaTime)
+  {
+    var heightAlongDirection = Vector3.Dot(GameObject.Transform.Translation, Direction);
+    if (heightAlongDirection > Floor)
+    {
+      IsInAir = false;
+      var velocityAlongDirection = Vector3.Dot(_rigidbody.Velocity, Direction);
+      if (velocityAlongDirection > 0)
+        _rigidbody.AddVelocity(-velocityAlongDirection * Direction);
+
+      return;
+    }
+
+    IsInAir = true;
+    var gravity = Strength * Direction;
+    _rigidbody.AddForce(gravity);
+  }
+}

DoomDeathmatch/src/Component/HealthComponent.cs

@@ -0,0 +1,33 @@
+namespace DoomDeathmatch.Component;
+
+public class HealthComponent : Engine.Scene.Component.Component
+{
+  public float MaxHealth { get; set; } = 100;
+  public float Health { get; private set; } = 100;
+  public event Action<HealthComponent>? HealthChanged;
+  public event Action<HealthComponent>? Died;
+
+  public void TakeDamage(float parDamage)
+  {
+    Health -= parDamage;
+    if (Health <= 0)
+    {
+      Died?.Invoke(this);
+    }
+    else
+    {
+      HealthChanged?.Invoke(this);
+    }
+  }
+
+  public void Heal(float parHeal)
+  {
+    Health += parHeal;
+    if (Health > MaxHealth)
+    {
+      Health = MaxHealth;
+    }
+
+    HealthChanged?.Invoke(this);
+  }
+}

DoomDeathmatch/src/Component/RigidbodyComponent.cs

@@ -0,0 +1,39 @@
+using OpenTK.Mathematics;
+
+namespace DoomDeathmatch.Component;
+
+public class RigidbodyComponent : Engine.Scene.Component.Component
+{
+  public Vector3 Velocity { get; private set; } = Vector3.Zero;
+  public Vector3 Acceleration { get; private set; } = Vector3.Zero;
+  public Vector3 Force { get; private set; } = Vector3.Zero;
+  public float Mass { get; set; } = 1.0f;
+  public bool IsStatic { get; set; } = false;
+
+  public void AddForce(Vector3 parForce)
+  {
+    if (IsStatic)
+      return;
+
+    Force += parForce;
+  }
+
+  public void AddVelocity(Vector3 parVelocity)
+  {
+    if (IsStatic)
+      return;
+
+    Velocity += parVelocity;
+  }
+
+  public override void Update(double parDeltaTime)
+  {
+    if (IsStatic)
+      return;
+
+    Acceleration = Force / Mass;
+    Velocity += Acceleration * (float)parDeltaTime;
+    GameObject.Transform.Translation += Velocity * (float)parDeltaTime;
+    Force = Vector3.Zero;
+  }
+}

DoomDeathmatch/src/Component/UI/Anchor.cs

@@ -0,0 +1,14 @@
+namespace DoomDeathmatch.Component.UI;
+
+public enum Anchor
+{
+  TopLeft,
+  TopCenter,
+  TopRight,
+  CenterLeft,
+  Center,
+  CenterRight,
+  BottomLeft,
+  BottomCenter,
+  BottomRight
+}

DoomDeathmatch/src/Component/UI/Orientation.cs

@@ -0,0 +1,7 @@
+namespace DoomDeathmatch.Component.UI;
+
+public enum Orientation
+{
+  Horizontal,
+  Vertical
+}

DoomDeathmatch/src/Component/UI/SelectorComponent.cs

@@ -0,0 +1,88 @@
+using Engine.Input;
+
+namespace DoomDeathmatch.Component.UI;
+
+public class SelectorComponent : Engine.Scene.Component.Component
+{
+  public List<UiComponent> Children => _children;
+  public KeyboardButtonCode SelectKey { get; set; } = KeyboardButtonCode.Space;
+  public KeyboardButtonCode NextKey { get; set; } = KeyboardButtonCode.Down;
+  public KeyboardButtonCode PrevKey { get; set; } = KeyboardButtonCode.Up;
+
+  public event Action<UiComponent>? OnSelect;
+
+  private readonly IInputHandler _inputHandler = Engine.Engine.Instance.InputHandler!;
+
+  private readonly List<UiComponent> _children = [];
+
+  private int _selectedIndex = 0;
+
+  public override void Start()
+  {
+    foreach (var child in Children)
+    {
+      child.OnMouseOver += Select;
+    }
+
+    SelectionChanged();
+  }
+
+  public override void Update(double parDeltaTime)
+  {
+    if (_inputHandler.IsKeyJustPressed(SelectKey))
+      _children[_selectedIndex].InvokeClick();
+
+    if (_inputHandler.IsKeyJustPressed(NextKey))
+    {
+      _selectedIndex++;
+      if (_selectedIndex >= Children.Count)
+        _selectedIndex = 0;
+
+      SelectionChanged();
+    }
+
+    if (_inputHandler.IsKeyJustPressed(PrevKey))
+    {
+      _selectedIndex--;
+      if (_selectedIndex < 0)
+        _selectedIndex = Children.Count - 1;
+
+      SelectionChanged();
+    }
+
+    UpdatePosition();
+  }
+
+  private void SelectionChanged()
+  {
+    OnSelect?.Invoke(Children[_selectedIndex]);
+  }
+
+  private void UpdatePosition()
+  {
+    var child = Children[_selectedIndex];
+
+    var transformMatrix = child.GameObject.Transform.FullTransformMatrix;
+    var translation = transformMatrix.ExtractTranslation();
+    var scale = transformMatrix.ExtractScale();
+
+    GameObject.Transform.Translation = translation;
+    GameObject.Transform.Translation.X -= scale.X / 2 + 0.05f;
+
+    GameObject.Transform.Size.Y = scale.Y;
+  }
+
+  private void Select(UiComponent parComponent)
+  {
+    var index = Children.IndexOf(parComponent);
+    if (index < 0)
+      index = 0;
+
+    if (index == _selectedIndex)
+      return;
+
+    _selectedIndex = index;
+
+    SelectionChanged();
+  }
+}

DoomDeathmatch/src/Component/UI/StackComponent.cs

@@ -0,0 +1,32 @@
+using Engine.Scene;
+using OpenTK.Mathematics;
+
+namespace DoomDeathmatch.Component.UI;
+
+public class StackComponent : UiContainerComponent
+{
+  public List<UiComponent> Children => _children;
+  public Orientation Orientation { get; set; } = Orientation.Vertical;
+
+  private readonly List<UiComponent> _children = [];
+
+  public override void Update(double parDeltaTime)
+  {
+    base.Update(parDeltaTime);
+
+    var size = GameObject.Transform.Size.Xy;
+    var count = _children.Count;
+
+    size *= Orientation == Orientation.Horizontal ? new Vector2(1, 0) : new Vector2(0, 1);
+
+    var offset = new Vector2(-size.X / 2 + size.X / count / 2, -size.Y / 2 + size.Y / count / 2);
+
+    for (var i = count - 1; i >= 0; i--)
+    {
+      var child = _children[i];
+
+      child.Offset = offset;
+      offset += size / count;
+    }
+  }
+}

DoomDeathmatch/src/Component/UI/TestComponent.cs

@@ -0,0 +1,20 @@
+using Engine.Input;
+using Engine.Scene.Component.BuiltIn;
+
+namespace DoomDeathmatch.Component.UI;
+
+public class TestComponent : Engine.Scene.Component.Component
+{
+  private readonly IInputHandler _inputHandler = Engine.Engine.Instance.InputHandler!;
+  public Camera? Camera { get; set; }
+
+  public override void Update(double parDeltaTime)
+  {
+    if (Camera == null)
+    {
+      return;
+    }
+
+    GameObject.Transform.Size.Xy = 2 * Camera.ScreenToWorld(_inputHandler.MousePosition).Xy;
+  }
+}

DoomDeathmatch/src/Component/UI/TextAlignComponent.cs

@@ -0,0 +1,54 @@
+using Engine.Scene.Component.BuiltIn.Renderer;
+using OpenTK.Mathematics;
+
+namespace DoomDeathmatch.Component.UI;
+
+public class TextAlignComponent : Engine.Scene.Component.Component
+{
+  public Align Alignment { get; set; } = Align.Left;
+
+  private TextRenderer _textRenderer = null!;
+
+  private string? _cachedText;
+
+  public override void Awake()
+  {
+    _textRenderer = GameObject.GetComponent<TextRenderer>()!;
+  }
+
+  public override void Update(double parDeltaTime)
+  {
+    if (_textRenderer.Text == null)
+      return;
+
+    if (_cachedText == _textRenderer.Text)
+      return;
+
+    _cachedText = _textRenderer.Text;
+    var font = _textRenderer.Font;
+    var size = font.Measure(_textRenderer.Text);
+    var scale = GameObject.Transform.FullTransformMatrix.ExtractScale();
+    var offset = GetOffset(size) + new Vector2(0, font.Metadata.Metrics.LineHeight - font.Metadata.Metrics.Ascender) / 2;
+    offset *= scale.Xy;
+
+    GameObject.Transform.Translation.Xy = offset;
+  }
+
+  public Vector2 GetOffset(Vector2 parSize)
+  {
+    return Alignment switch
+    {
+      Align.Left => new Vector2(0, -parSize.Y / 2),
+      Align.Center => new Vector2(-parSize.X / 2, -parSize.Y / 2),
+      Align.Right => new Vector2(-parSize.X, -parSize.Y / 2),
+      _ => throw new ArgumentOutOfRangeException(nameof(Alignment), Alignment, null)
+    };
+  }
+
+  public enum Align
+  {
+    Left,
+    Center,
+    Right
+  }
+}

DoomDeathmatch/src/Component/UI/UiComponent.cs

@@ -0,0 +1,72 @@
+using Engine.Input;
+using OpenTK.Mathematics;
+
+namespace DoomDeathmatch.Component.UI;
+
+public class UiComponent : Engine.Scene.Component.Component
+{
+  public UiContainerComponent? Container { get; set; }
+  public Anchor Anchor { get; set; } = Anchor.Center;
+  public Vector2 Offset { get; set; } = Vector2.Zero;
+  public Vector2 Center { get; set; } = Vector2.Zero;
+
+  public event Action<UiComponent>? OnClick;
+  public event Action<UiComponent>? OnMouseOver;
+
+  private readonly IInputHandler _inputHandler = Engine.Engine.Instance.InputHandler!;
+
+  public override void Update(double parDeltaTime)
+  {
+    if (Container == null)
+    {
+      return;
+    }
+
+    GameObject.Transform.Translation.Xy = GetAnchorPosition(Container.GameObject.Transform.Size.Xy) + Offset;
+    var transformMatrix = GameObject.Transform.FullTransformMatrix;
+    var translation = transformMatrix.ExtractTranslation();
+    var scale = transformMatrix.ExtractScale();
+
+    var relativeMousePosition = Container.MousePosition.Xy -
+                                (translation.Xy);
+
+    var objectSize = scale.Xy;
+
+    if (Math.Abs(relativeMousePosition.X) <= objectSize.X / 2 && Math.Abs(relativeMousePosition.Y) <= objectSize.Y / 2)
+    {
+      OnMouseOver?.Invoke(this);
+
+      if (_inputHandler.IsMouseButtonJustPressed(MouseButtonCode.Left))
+      {
+        OnClick?.Invoke(this);
+      }
+    }
+  }
+
+  public void InvokeClick()
+  {
+    OnClick?.Invoke(this);
+  }
+
+  private Vector2 GetAnchorPosition(Vector2 parSize)
+  {
+    return parSize * GetAnchorRatio();
+  }
+
+  private Vector2 GetAnchorRatio()
+  {
+    return Anchor switch
+    {
+      Anchor.TopLeft => new Vector2(-0.5f, 0.5f),
+      Anchor.TopCenter => new Vector2(0, 0.5f),
+      Anchor.TopRight => new Vector2(0.5f, 0.5f),
+      Anchor.CenterLeft => new Vector2(-0.5f, 0),
+      Anchor.Center => new Vector2(0, 0),
+      Anchor.CenterRight => new Vector2(0.5f, 0),
+      Anchor.BottomLeft => new Vector2(-0.5f, -0.5f),
+      Anchor.BottomCenter => new Vector2(0, -0.5f),
+      Anchor.BottomRight => new Vector2(0.5f, -0.5f),
+      _ => throw new ArgumentOutOfRangeException(nameof(Anchor), Anchor, null)
+    };
+  }
+}

DoomDeathmatch/src/Component/UI/UiContainerComponent.cs

@@ -0,0 +1,28 @@
+using Engine.Input;
+using Engine.Scene.Component.BuiltIn;
+using OpenTK.Mathematics;
+
+namespace DoomDeathmatch.Component.UI;
+
+public class UiContainerComponent : UiComponent
+{
+  private readonly IInputHandler _inputHandler = Engine.Engine.Instance.InputHandler!;
+
+  public Camera? Camera { get; set; }
+  public Vector3 MousePosition { get; private set; }
+
+  public override void Update(double parDeltaTime)
+  {
+    base.Update(parDeltaTime);
+
+    if (Camera != null)
+    {
+      GameObject.Transform.Size.Xy = Camera.GameObject.Transform.Size.Xy;
+      MousePosition = Camera.ScreenToWorld(_inputHandler.MousePosition);
+    }
+    else if (Container != null)
+    {
+      MousePosition = Container.MousePosition;
+    }
+  }
+}

DoomDeathmatch/src/DoomDeathmatch.cs

@@ -1,5 +1,15 @@
-using DoomDeathmatch.Component;
+using System.Text.Json;
+using DoomDeathmatch.Component;
+using DoomDeathmatch.Component.UI;
+using DoomDeathmatch.Scene.Main;
+using DoomDeathmatch.Scene.Rules;
+using Engine.Asset.Font;
+using Engine.Asset.Font.Metadata;
+using Engine.Asset.Mesh;
 using Engine.Asset.Mesh.Loader;
+using Engine.Graphics.Camera;
+using Engine.Graphics.Pipeline;
+using Engine.Graphics.Texture;
 using Engine.Scene;
 using Engine.Scene.Component.BuiltIn;
 using Engine.Scene.Component.BuiltIn.Renderer;
@@ -11,32 +21,70 @@ public static class DoomDeathmatch
 {
   public static void Initialize(Engine.Engine parEngine)
   {
-    parEngine.SceneManager.TransitionTo(MainScene());
+    parEngine.SceneManager.TransitionTo(MainScene.Create(parEngine));
   }
 
-  private static Scene MainScene()
-  {
-    var cameraObject = new GameObject();
-    cameraObject.Transform.Translation.Z = -6;
-    cameraObject.AddComponent<PerspectiveCamera>();
-    cameraObject.AddComponent<ControllerComponent>();
-
-    using var reader = new StreamReader("../DoomDeathmatch/asset/model/test2.obj");
-    var mesh = ObjMeshLoader.Load(reader);
-
-    var box2dRenderer = new GameObject();
-    box2dRenderer.AddComponent(new MeshRenderer { Mesh = mesh });
-    box2dRenderer.AddComponent<RotateComponent>();
-
-    var testChild = new GameObject();
-    testChild.Transform.Scale /= 4;
-    testChild.AddComponent(new MeshRenderer { Mesh = mesh });
-
-    var scene = new Scene();
-    scene.Add(cameraObject);
-    scene.Add(box2dRenderer);
-    scene.AddChild(box2dRenderer, testChild);
-
-    return scene;
-  }
+  // private static Scene MainScene(Engine.Engine parEngine)
+  // {
+  //   var playerObject = new GameObject();
+  //   playerObject.AddComponent<RigidbodyComponent>();
+  //   playerObject.AddComponent(new ControllerComponent { Speed = 5f });
+  //   playerObject.AddComponent(new DragComponent { Drag = 5f, Coefficient = new Vector3(1, 1, 0) });
+  //   playerObject.AddComponent(new TestComponent());
+  //
+  //   var cameraObject = new GameObject();
+  //   cameraObject.Transform.Translation.Z = 2;
+  //   cameraObject.AddComponent<PerspectiveCamera>();
+  //
+  //   var testObject = new GameObject { Transform = { Translation = new Vector3(0, 6, 0), Rotation = Quaternion.FromAxisAngle(Vector3.UnitX, (float)Math.PI / 2) } };
+  //   testObject.AddComponent(new Box2DRenderer { Color = new Vector4(1, 0, 0, 1) });
+  //
+  //   var mesh = parEngine.AssetResourceManager.Load<Mesh>("model/untitled.obj");
+  //   var texture = parEngine.AssetResourceManager.Load<Texture>("TestImage.png");
+  //   var font = parEngine.AssetResourceManager.Load<Font>("font/test");
+  //
+  //   var box2dRenderer = new GameObject
+  //   {
+  //     Transform = { Scale = new Vector3(1), Rotation = Quaternion.FromAxisAngle(Vector3.UnitX, (float)Math.PI / 2) }
+  //   };
+  //   // box2dRenderer.AddComponent(new MeshRenderer { Mesh = mesh, Albedo = texture });
+  //   box2dRenderer.AddComponent(new TextRenderer { Font = font, Text = "A", RenderLayer = RenderLayer.HUD });
+  //   // box2dRenderer.AddComponent(new BillboardComponent { Target = cameraObject.Transform });
+  //
+  //   var xAxis = new GameObject();
+  //   xAxis.Transform.Translation.X = 5;
+  //   xAxis.Transform.Scale.X = 10;
+  //   xAxis.AddComponent(new Box2DRenderer { Color = new Vector4(1, 0, 0, 1) });
+  //
+  //   var yAxis = new GameObject();
+  //   yAxis.Transform.Translation.Y = 5;
+  //   yAxis.Transform.Scale.X = 10;
+  //   yAxis.Transform.Rotation *= Quaternion.FromAxisAngle(Vector3.UnitZ, (float)Math.PI / 2);
+  //   yAxis.AddComponent(new Box2DRenderer { Color = new Vector4(0, 1, 0, 1) });
+  //
+  //   var zAxis = new GameObject();
+  //   zAxis.Transform.Translation.Z = 5;
+  //   zAxis.Transform.Scale.Y = 10;
+  //   zAxis.Transform.Scale.X = 10;
+  //   zAxis.Transform.Rotation *= Quaternion.FromAxisAngle(Vector3.UnitX, (float)Math.PI / 2);
+  //   zAxis.AddComponent(new Box2DRenderer
+  //   {
+  //     Color = new Vector4(0, 0, 1, 1), Texture = parEngine.AssetResourceManager.Load<Texture>("test.jpeg")
+  //   });
+  //
+  //   var scene = new Scene();
+  //   scene.Add(cameraObject);
+  //   scene.AddChild(cameraObject, testObject);
+  //   scene.Add(playerObject);
+  //   scene.SetChild(playerObject, cameraObject);
+  //
+  //   scene.Add(box2dRenderer);
+  //   // scene.AddChild(box2dRenderer, testChild);
+  //
+  //   scene.Add(xAxis);
+  //   // scene.Add(yAxis);
+  //   // scene.Add(zAxis);
+  //
+  //   return scene;
+  // }
 }

DoomDeathmatch/src/Scene/Leaders/LeadersScene.cs

@@ -0,0 +1,52 @@
+using DoomDeathmatch.Component.UI;
+using DoomDeathmatch.Scene.Main;
+using Engine.Asset.Font;
+using Engine.Input;
+using Engine.Scene;
+using Engine.Scene.Component.BuiltIn.Renderer;
+using OpenTK.Mathematics;
+
+namespace DoomDeathmatch.Scene.Leaders;
+
+public static class LeadersScene
+{
+  public static Engine.Scene.Scene Create(Engine.Engine parEngine)
+  {
+    var scene = new Engine.Scene.Scene();
+
+    var (cameraObject, camera) = UiUtil.CreateOrthographicCamera(scene);
+
+    var (uiContainerObject, uiContainer) = UiUtil.CreateBackgroundUi(scene, camera);
+
+    var (logoObject, logoUi) = UiUtil.CreateLogoUi(parEngine, scene, uiContainer);
+
+    var (backUiObject, backUi) = UiUtil.CreateTextUi(scene, uiContainer,
+      UiUtil.GetDoomFont(parEngine), "Назад");
+    backUi.OnClick += _ => parEngine.SceneManager.TransitionTo(MainScene.Create(parEngine));
+
+    var (stackObject, stack) = UiUtil.CreateStackUi(scene, uiContainer,
+      [backUi]);
+    stack.Offset = new Vector2(0, -1f);
+    stackObject.Transform.Size = new Vector3(1f, 6f, 1f);
+
+    var selectorObject = new GameObject
+    {
+      Transform = { Translation = new Vector3(0, 0, -1), Size = new Vector3(0.5f, 1f, 1f) }
+    };
+    selectorObject.AddComponent(new SelectorComponent
+    {
+      Children = { backUi },
+      SelectKey = KeyboardButtonCode.Space,
+      NextKey = KeyboardButtonCode.Down,
+      PrevKey = KeyboardButtonCode.Up,
+    });
+    selectorObject.AddComponent(new Box2DRenderer { Color = new Vector4(1, 0, 0, 1) });
+
+    scene.AddChild(uiContainerObject, selectorObject);
+    scene.SetChild(uiContainerObject, logoObject);
+    scene.SetChild(uiContainerObject, stackObject);
+    scene.SetChild(stackObject, backUiObject);
+
+    return scene;
+  }
+}

DoomDeathmatch/src/Scene/Main/MainScene.cs

@@ -0,0 +1,77 @@
+using DoomDeathmatch.Component.UI;
+using DoomDeathmatch.Scene.Leaders;
+using DoomDeathmatch.Scene.Rules;
+using Engine.Asset.Font;
+using Engine.Input;
+using Engine.Scene;
+using Engine.Scene.Component.BuiltIn;
+using Engine.Scene.Component.BuiltIn.Renderer;
+using OpenTK.Mathematics;
+
+namespace DoomDeathmatch.Scene.Main;
+
+public static class MainScene
+{
+  public static Engine.Scene.Scene Create(Engine.Engine parEngine)
+  {
+    var scene = new Engine.Scene.Scene();
+
+    var (cameraObject, camera) = UiUtil.CreateOrthographicCamera(scene);
+
+    AddMainUi(parEngine, scene, camera);
+
+    return scene;
+  }
+
+  private static void AddMainUi(Engine.Engine parEngine, Engine.Scene.Scene parScene, Camera parCamera)
+  {
+    var (uiContainerObject, uiContainer) = UiUtil.CreateBackgroundUi(parScene, parCamera);
+
+    var (playUiObject, playUi) =
+      UiUtil.CreateTextUi(parScene, uiContainer, UiUtil.GetDoomFont(parEngine), "Играть");
+
+    var (leadersUiObject, leadersUi) =
+      UiUtil.CreateTextUi(parScene, uiContainer, UiUtil.GetDoomFont(parEngine), "Лидеры");
+
+    var (rulesUiObject, rulesUi) =
+      UiUtil.CreateTextUi(parScene, uiContainer, UiUtil.GetDoomFont(parEngine), "Правила");
+
+    var (exitUiObject, exitUi) =
+      UiUtil.CreateTextUi(parScene, uiContainer, UiUtil.GetDoomFont(parEngine), "Выход");
+
+    var (stackObject, stack) = UiUtil.CreateStackUi(parScene, uiContainer,
+      [playUi, leadersUi, rulesUi, exitUi]);
+    stack.Offset = new Vector2(0, -1f);
+    stackObject.Transform.Size = new Vector3(2f, 5f, 1f);
+
+    playUi.OnClick += _ => Console.WriteLine("Play");
+    leadersUi.OnClick += _ => parEngine.SceneManager.TransitionTo(LeadersScene.Create(parEngine));
+    rulesUi.OnClick += _ => parEngine.SceneManager.TransitionTo(RulesScene.Create(parEngine));
+    exitUi.OnClick += _ => parEngine.Close();
+
+    var (logoObject, logoUi) = UiUtil.CreateLogoUi(parEngine, parScene, uiContainer);
+
+    var selectorObject = new GameObject
+    {
+      Transform = { Translation = new Vector3(0, 0, -1), Size = new Vector3(0.5f, 1f, 1f) }
+    };
+    selectorObject.AddComponent(new SelectorComponent
+    {
+      Children = { playUi, leadersUi, rulesUi, exitUi },
+      SelectKey = KeyboardButtonCode.Space,
+      NextKey = KeyboardButtonCode.Down,
+      PrevKey = KeyboardButtonCode.Up,
+    });
+    selectorObject.AddComponent(new Box2DRenderer { Color = new Vector4(1, 0, 0, 1) });
+
+    parScene.AddChild(uiContainerObject, selectorObject);
+
+    parScene.SetChild(uiContainerObject, stackObject);
+    parScene.SetChild(uiContainerObject, logoObject);
+
+    parScene.SetChild(stackObject, playUiObject);
+    parScene.SetChild(stackObject, leadersUiObject);
+    parScene.SetChild(stackObject, rulesUiObject);
+    parScene.SetChild(stackObject, exitUiObject);
+  }
+}

DoomDeathmatch/src/Scene/Rules/RulesScene.cs

@@ -0,0 +1,58 @@
+using DoomDeathmatch.Component.UI;
+using DoomDeathmatch.Scene.Main;
+using Engine.Asset.Font;
+using Engine.Input;
+using Engine.Scene;
+using Engine.Scene.Component.BuiltIn.Renderer;
+using OpenTK.Mathematics;
+
+namespace DoomDeathmatch.Scene.Rules;
+
+public static class RulesScene
+{
+  public static Engine.Scene.Scene Create(Engine.Engine parEngine)
+  {
+    var scene = new Engine.Scene.Scene();
+
+    var (cameraObject, camera) = UiUtil.CreateOrthographicCamera(scene);
+
+    var (uiContainerObject, uiContainer) = UiUtil.CreateBackgroundUi(scene, camera);
+
+    var (logoObject, logoUi) = UiUtil.CreateLogoUi(parEngine, scene, uiContainer);
+
+    var (backUiObject, backUi) = UiUtil.CreateTextUi(scene, uiContainer,
+      parEngine.AssetResourceManager.Load<Font>("font/test"), "Назад");
+    backUi.OnClick += _ => parEngine.SceneManager.TransitionTo(MainScene.Create(parEngine));
+
+    var (rulesObject, rulesUi) = UiUtil.CreateTextUi(scene, uiContainer,
+      parEngine.AssetResourceManager.Load<Font>("font/test"), "Правила");
+
+    var (stackObject, stack) = UiUtil.CreateStackUi(scene, uiContainer,
+      [rulesUi, backUi]);
+    stack.Offset = new Vector2(0, -1f);
+    stackObject.Transform.Size = new Vector3(1f, 6f, 1f);
+
+    var selectorObject = new GameObject
+    {
+      Transform = { Translation = new Vector3(0, 0, -1), Size = new Vector3(0.5f, 1f, 1f) }
+    };
+    selectorObject.AddComponent(new SelectorComponent
+    {
+      Children = { backUi },
+      SelectKey = KeyboardButtonCode.Space,
+      NextKey = KeyboardButtonCode.Down,
+      PrevKey = KeyboardButtonCode.Up,
+    });
+    selectorObject.AddComponent(new Box2DRenderer { Color = new Vector4(1, 0, 0, 1) });
+
+    scene.AddChild(uiContainerObject, selectorObject);
+
+    scene.SetChild(uiContainerObject, logoObject);
+    scene.SetChild(uiContainerObject, stackObject);
+
+    scene.SetChild(stackObject, rulesObject);
+    scene.SetChild(stackObject, backUiObject);
+
+    return scene;
+  }
+}

DoomDeathmatch/src/UiUtil.cs

@@ -0,0 +1,116 @@
+using DoomDeathmatch.Component.UI;
+using Engine.Asset.Font;
+using Engine.Graphics.Texture;
+using Engine.Scene;
+using Engine.Scene.Component.BuiltIn;
+using Engine.Scene.Component.BuiltIn.Renderer;
+using OpenTK.Mathematics;
+
+namespace DoomDeathmatch;
+
+public static class UiUtil
+{
+  public static Font GetDoomFont(Engine.Engine parEngine)
+  {
+    return parEngine.AssetResourceManager.Load<Font>("font/doom");
+  }
+
+  public static (GameObject, OrthographicCamera) CreateOrthographicCamera(Engine.Scene.Scene parScene)
+  {
+    var cameraObject = new GameObject();
+    var camera = new OrthographicCamera();
+    cameraObject.AddComponent(camera);
+
+    parScene.Add(cameraObject);
+
+    return (cameraObject, camera);
+  }
+
+  public static (GameObject, UiComponent) CreateTextUi(Engine.Scene.Scene parScene, UiContainerComponent parContainer,
+    Font parFont, string parText)
+  {
+    var size = parFont.Measure(parText);
+    var outerObject = new GameObject
+    {
+      Transform = { Size = new Vector3(size.X, size.Y, 1f), Translation = new Vector3(0, 0, -1) }
+    };
+    var uiComponent = new UiComponent { Container = parContainer, Anchor = Anchor.Center };
+    outerObject.AddComponent(uiComponent);
+    outerObject.AddComponent(new Box2DRenderer { Color = new Vector4(0, 0, 1, 1) });
+
+    var innerObject = new GameObject { Transform = { Translation = new Vector3(0, 0, -1) } };
+    innerObject.AddComponent(new TextRenderer { Font = parFont, Text = parText });
+    innerObject.AddComponent(new TextAlignComponent { Alignment = TextAlignComponent.Align.Center });
+
+    parScene.Add(outerObject);
+    parScene.AddChild(outerObject, innerObject);
+
+    return (outerObject, uiComponent);
+  }
+
+  public static (GameObject, UiContainerComponent) CreateBackgroundUi(Engine.Scene.Scene parScene, Camera parCamera)
+  {
+    var uiContainerObject = new GameObject();
+    var uiContainer = new UiContainerComponent { Camera = parCamera };
+    uiContainerObject.AddComponent(uiContainer);
+    uiContainerObject.AddComponent(new Box2DRenderer { Color = new Vector4(0.1f, 0.1f, 0.1f, 1) });
+
+    parScene.Add(uiContainerObject);
+
+    return (uiContainerObject, uiContainer);
+  }
+
+  public static (GameObject, UiComponent) CreateLogoUi(Engine.Engine parEngine, Engine.Scene.Scene parScene,
+    UiContainerComponent parContainer)
+  {
+    var logoObject = new GameObject
+    {
+      Transform =
+      {
+        Translation = new Vector3(0, 0, -10), Scale = new Vector3(3), Size = new Vector3(1.6385869565f, 1f, 1f)
+      }
+    };
+    logoObject.AddComponent(new Box2DRenderer
+    {
+      Texture = parEngine.AssetResourceManager.Load<Texture>("texture/doom_logo.png")
+    });
+
+    var uiComponent = new UiComponent { Container = null, Anchor = Anchor.Center };
+
+    logoObject.AddComponent(new UiComponent
+    {
+      Container = parContainer, Anchor = Anchor.Center, Offset = new Vector2(0, 3f)
+    });
+
+    parScene.Add(logoObject);
+
+    return (logoObject, uiComponent);
+  }
+
+  public static (GameObject, StackComponent) CreateStackUi(Engine.Scene.Scene parScene,
+    UiContainerComponent parContainer, List<UiComponent> parChildren, Orientation parOrientation = Orientation.Vertical)
+  {
+    var stack = new StackComponent
+    {
+      Container = parContainer,
+      Anchor = Anchor.Center
+    };
+
+    stack.Children.AddRange(parChildren);
+    foreach (var child in parChildren)
+    {
+      child.Container = stack;
+    }
+
+    var stackObject = new GameObject
+    {
+      Transform = { Translation = new Vector3(0, 0, -1) }
+    };
+    stackObject.AddComponent(stack);
+    stackObject.AddComponent(new Box2DRenderer { Color = new Vector4(1, 0, 0, 1) });
+
+    parScene.Add(stackObject);
+
+    return (stackObject, stack);
+  }
+}

Engine/Engine.csproj

@@ -26,6 +26,7 @@
         <PackageReference Include="Serilog.Enrichers.Thread" Version="4.0.0"/>
         <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0"/>
         <PackageReference Include="Serilog.Sinks.File" Version="6.0.0"/>
+        <PackageReference Include="SixLabors.ImageSharp" Version="3.1.6" />
     </ItemGroup>
 
     <ItemGroup>

Engine/assets/shader/mesh.shader

@@ -11,7 +11,7 @@ layout (location = 3) in int aTextureId;
 layout (location = 4) in mat4 aModelMatrix;
 
 layout (location = 0) out vec2 oUV;
-layout (location = 1) out int oTextureId;
+layout (location = 1) flat out int oTextureId;
 layout (location = 2) out vec3 oNormal;
 
 void main()
@@ -35,7 +35,7 @@ layout (location = 0) out vec4 FragColor;
 
 void main()
 {
-    vec3 lightColor = vec3(iUV, 0);
+    vec3 lightColor = vec3(1);
     FragColor = vec4(lightColor, 1.0);
     if (iTextureId >= 0)
         FragColor *= texture(uTexture[iTextureId], iUV);

Engine/assets/shader/quad.shader

@@ -12,7 +12,7 @@ layout (location = 4) in mat4 aModel;
 
 layout (location = 0) out vec4 oColor;
 layout (location = 1) out vec2 oUV;
-layout (location = 2) out int oTextureId;
+layout (location = 2) flat out int oTextureId;
 
 void main()
 {

Engine/assets/shader/text.shader

@@ -0,0 +1,61 @@
+// #type vertex
+#version 460 core
+
+uniform mat4 u_Projection;
+uniform mat4 u_View;
+
+layout (location = 0) in vec4 a_Position;
+layout (location = 1) in vec2 a_UV;
+layout (location = 2) in vec4 a_Color;
+layout (location = 3) in int a_AtlasId;
+layout (location = 4) in vec2 a_UnitRange;
+layout (location = 5) in mat4 a_Model;
+
+layout (location = 0) out vec4 o_Color;
+layout (location = 1) out vec2 o_UV;
+layout (location = 2) flat out int o_AtlasId;
+layout (location = 3) flat out vec2 o_UnitRange;
+
+void main()
+{
+    o_Color = a_Color;
+    o_UV = a_UV;
+    o_AtlasId = a_AtlasId;
+    o_UnitRange = a_UnitRange;
+
+    gl_Position = u_Projection * u_View * a_Model * a_Position;
+}
+
+// #type fragment
+#version 460 core
+
+uniform sampler2D u_Atlas[16];
+
+layout (location = 0) in vec4 i_Color;
+layout (location = 1) in vec2 i_UV;
+layout (location = 2) flat in int i_AtlasId;
+layout (location = 3) flat in vec2 i_UnitRange;
+
+layout (location = 0) out vec4 FragColor;
+
+float median(float r, float g, float b) {
+    return max(min(r, g), min(max(r, g), b));
+}
+
+float screenPxRange() {
+    vec2 screenTexSize = vec2(1.0) / fwidth(i_UV);
+    return max(0.5 * dot(i_UnitRange, screenTexSize), 1.0);
+}
+
+void main()
+{
+    vec3 msd = texture(u_Atlas[i_AtlasId], i_UV).rgb;
+    float sd = median(msd.r, msd.g, msd.b);
+    float screenPxDistance = screenPxRange() * (sd - 0.5);
+    float opacity = clamp(screenPxDistance + 0.5, 0.0, 1.0);
+    // this is a temporary solution for TODO: fix depth test self discard on overlap
+    if (opacity == 0.0) {
+        discard;
+    }
+    FragColor = mix(vec4(0), i_Color, opacity);
+}

Engine/src/Asset/Font/Font.cs

@@ -0,0 +1,109 @@
+using Engine.Asset.Font.Metadata;
+using Engine.Graphics.Texture;
+using OpenTK.Mathematics;
+
+namespace Engine.Asset.Font;
+
+public class Font
+{
+  public StaticTexture AtlasTexture => _atlasTexture;
+  public Metadata.Metadata Metadata => _metadata;
+  public Vector2 UnitRange => _unitRange;
+
+  private readonly StaticTexture _atlasTexture;
+  private readonly Metadata.Metadata _metadata;
+
+  private readonly Dictionary<int, Glyph> _glyphs = new();
+  private readonly Dictionary<int, GlyphData> _glyphData = new();
+  private readonly Dictionary<(int, int), Kerning> _kernings = new();
+  private readonly Vector2 _unitRange;
+
+  public Font(StaticTexture parAtlasTexture, Metadata.Metadata parMetadata)
+  {
+    _atlasTexture = parAtlasTexture;
+    _metadata = parMetadata;
+    _unitRange = new Vector2(_metadata.Atlas.DistanceRange / _metadata.Atlas.Width,
+      _metadata.Atlas.DistanceRange / _metadata.Atlas.Height);
+
+    LoadGlyphs();
+    LoadKernings();
+  }
+
+  public Glyph? GetGlyph(int parUnicode)
+  {
+    return _glyphs.GetValueOrDefault(parUnicode);
+  }
+
+  public GlyphData? GetGlyphData(int parUnicode)
+  {
+    return _glyphData.GetValueOrDefault(parUnicode);
+  }
+
+  public Kerning? GetKerning(int parUnicode1, int parUnicode2)
+  {
+    return _kernings.GetValueOrDefault((parUnicode1, parUnicode2));
+  }
+
+  public FontIterator Iterator(string parText)
+  {
+    return new FontIterator(this, parText);
+  }
+
+  public Vector2 Measure(string parText)
+  {
+    var fontIterator = Iterator(parText);
+    _ = fontIterator.ToList();
+
+    return new Vector2(fontIterator.MaxWidth, fontIterator.MaxHeight);
+  }
+
+  private void LoadGlyphs()
+  {
+    foreach (var glyph in _metadata.Glyphs)
+    {
+      _glyphs.Add(glyph.Unicode, glyph);
+
+      if (glyph.PlaneBounds == null || glyph.AtlasBounds == null)
+      {
+        continue;
+      }
+
+      _glyphData.Add(glyph.Unicode, new GlyphData(_metadata, glyph));
+    }
+  }
+
+  private void LoadKernings()
+  {
+    foreach (var kerning in _metadata.Kerning)
+    {
+      _kernings.Add((kerning.Unicode1, kerning.Unicode2), kerning);
+    }
+  }
+
+  public record GlyphData
+  {
+    public Vector2[] Positions { get; }
+    public Vector2[] UVs { get; }
+
+    public GlyphData(in Metadata.Metadata parMetadata, in Glyph parGlyph)
+    {
+      var size = new Vector2(parMetadata.Atlas.Width, parMetadata.Atlas.Height);
+      Positions =
+      [
+        new Vector2(parGlyph.PlaneBounds!.Left, parGlyph.PlaneBounds.Bottom),
+        new Vector2(parGlyph.PlaneBounds.Left, parGlyph.PlaneBounds.Top),
+        new Vector2(parGlyph.PlaneBounds.Right, parGlyph.PlaneBounds.Bottom),
+        new Vector2(parGlyph.PlaneBounds.Right, parGlyph.PlaneBounds.Top),
+      ];
+
+      UVs =
+      [
+        new Vector2(parGlyph.AtlasBounds!.Left, parGlyph.AtlasBounds.Bottom) / size,
+        new Vector2(parGlyph.AtlasBounds.Left, parGlyph.AtlasBounds.Top) / size,
+        new Vector2(parGlyph.AtlasBounds.Right, parGlyph.AtlasBounds.Bottom) / size,
+
+        new Vector2(parGlyph.AtlasBounds.Right, parGlyph.AtlasBounds.Top) / size,
+      ];
+    }
+  }
+}

Engine/src/Asset/Font/FontIterator.cs

@@ -0,0 +1,119 @@
+using System.Collections;
+using OpenTK.Mathematics;
+
+namespace Engine.Asset.Font;
+
+public class FontIterator : IEnumerable<FontIterator.NextGlyphData>
+{
+  public float MaxWidth => _maxWidth;
+  public float MaxHeight => _maxHeight;
+
+  private readonly Font _font;
+  private readonly string _text;
+
+  private int _currentIndex;
+  private int _previousCodepoint = -1;
+  private int _lineCharCount;
+  private Vector2 _cursor = Vector2.Zero;
+  private Vector2 _kerning = Vector2.Zero;
+
+  private float _maxWidth;
+  private float _maxHeight;
+
+  public FontIterator(Font parFont, string parText)
+  {
+    _font = parFont;
+    _text = parText;
+  }
+
+  private static bool IsLineBreak(int parCodepoint)
+  {
+    return parCodepoint == '\n';
+  }
+
+  private static bool IsTab(int parCodepoint)
+  {
+    return parCodepoint == '\t';
+  }
+
+  private void Tab()
+  {
+    var spaceGlyph = _font.GetGlyph(' ');
+    if (spaceGlyph == null)
+      return;
+
+    var missingSpaces = 4 - _lineCharCount % 4;
+    _cursor.X += missingSpaces * spaceGlyph.Advance;
+  }
+
+  private void LineBreak()
+  {
+    _kerning = Vector2.Zero;
+    _cursor.X = 0;
+    _cursor.Y += _font.Metadata.Metrics.LineHeight;
+    _lineCharCount = 0;
+    _previousCodepoint = -1;
+  }
+
+  public IEnumerator<NextGlyphData> GetEnumerator()
+  {
+    while (_currentIndex < _text.Length)
+    {
+      var codepoint = char.ConvertToUtf32(_text, _currentIndex);
+
+      if (IsLineBreak(codepoint))
+      {
+        LineBreak();
+        _currentIndex += 1;
+        continue;
+      }
+
+      if (IsTab(codepoint))
+      {
+        Tab();
+        _currentIndex += 1;
+        continue;
+      }
+
+      var glyph = _font.GetGlyph(codepoint);
+      if (glyph == null)
+      {
+        glyph = _font.GetGlyph('?');
+        if (glyph == null)
+        {
+          _currentIndex += 1;
+          continue;
+        }
+      }
+
+      if (_previousCodepoint != -1)
+      {
+        var kerning = _font.GetKerning(_previousCodepoint, glyph.Unicode);
+        if (kerning != null)
+        {
+          _kerning.X += kerning.Advance;
+        }
+      }
+
+      var glyphData = _font.GetGlyphData(glyph.Unicode);
+
+      _maxWidth = Math.Max(_maxWidth, _cursor.X + glyph.Advance);
+      _maxHeight = Math.Max(_maxHeight, _cursor.Y + _font.Metadata.Metrics.Ascender);
+
+      if (glyphData != null)
+        yield return new NextGlyphData(glyphData.Positions, glyphData.UVs, (_cursor + _kerning) * new Vector2(1, -1));
+
+      _cursor.X += glyph.Advance;
+      _lineCharCount++;
+      _previousCodepoint = glyph.Unicode;
+      _currentIndex += 1;
+    }
+  }
+
+  IEnumerator IEnumerable.GetEnumerator()
+  {
+    return GetEnumerator();
+  }
+
+  public record NextGlyphData(Vector2[] Positions, Vector2[] UVs, Vector2 Offset);
+}

Engine/src/Asset/Font/Metadata/Atlas.cs

@@ -0,0 +1,28 @@
+using System.Text.Json.Serialization;
+
+namespace Engine.Asset.Font.Metadata;
+
+[JsonSerializable(typeof(Atlas))]
+[Serializable]
+public record Atlas
+{
+  [JsonPropertyName("distanceRange")]
+  [JsonInclude]
+  public float DistanceRange { get; private set; }
+
+  [JsonPropertyName("size")]
+  [JsonInclude]
+  public float Size { get; private set; }
+
+  [JsonPropertyName("width")]
+  [JsonInclude]
+  public int Width { get; private set; }
+
+  [JsonPropertyName("height")]
+  [JsonInclude]
+  public int Height { get; private set; }
+
+  [JsonPropertyName("yOrigin")]
+  [JsonInclude]
+  public string YOrigin { get; private set; }
+}

Engine/src/Asset/Font/Metadata/Bounds.cs

@@ -0,0 +1,24 @@
+using System.Text.Json.Serialization;
+
+namespace Engine.Asset.Font.Metadata;
+
+[JsonSerializable(typeof(Bounds))]
+[Serializable]
+public record Bounds
+{
+  [JsonPropertyName("left")]
+  [JsonInclude]
+  public float Left { get; private set; }
+
+  [JsonPropertyName("bottom")]
+  [JsonInclude]
+  public float Bottom { get; private set; }
+
+  [JsonPropertyName("right")]
+  [JsonInclude]
+  public float Right { get; private set; }
+
+  [JsonPropertyName("top")]
+  [JsonInclude]
+  public float Top { get; private set; }
+}

Engine/src/Asset/Font/Metadata/Glyph.cs

@@ -0,0 +1,25 @@
+using System.Text.Json.Serialization;
+using OpenTK.Mathematics;
+
+namespace Engine.Asset.Font.Metadata;
+
+[JsonSerializable(typeof(Glyph))]
+[Serializable]
+public record Glyph
+{
+  [JsonPropertyName("unicode")]
+  [JsonInclude]
+  public int Unicode { get; private set; }
+
+  [JsonPropertyName("advance")]
+  [JsonInclude]
+  public float Advance { get; private set; }
+
+  [JsonPropertyName("planeBounds")]
+  [JsonInclude]
+  public Bounds? PlaneBounds { get; private set; }
+
+  [JsonPropertyName("atlasBounds")]
+  [JsonInclude]
+  public Bounds? AtlasBounds { get; private set; }
+}

Engine/src/Asset/Font/Metadata/Kerning.cs

@@ -0,0 +1,20 @@
+using System.Text.Json.Serialization;
+
+namespace Engine.Asset.Font.Metadata;
+
+[JsonSerializable(typeof(Kerning))]
+[Serializable]
+public record Kerning
+{
+  [JsonPropertyName("unicode1")]
+  [JsonInclude]
+  public int Unicode1 { get; private set; }
+
+  [JsonPropertyName("unicode2")]
+  [JsonInclude]
+  public int Unicode2 { get; private set; }
+
+  [JsonPropertyName("advance")]
+  [JsonInclude]
+  public float Advance { get; private set; }
+}

Engine/src/Asset/Font/Metadata/Metadata.cs

@@ -0,0 +1,24 @@
+using System.Text.Json.Serialization;
+
+namespace Engine.Asset.Font.Metadata;
+
+[JsonSerializable(typeof(Metadata))]
+[Serializable]
+public record Metadata
+{
+  [JsonPropertyName("atlas")]
+  [JsonInclude]
+  public Atlas Atlas { get; private set; }
+
+  [JsonPropertyName("metrics")]
+  [JsonInclude]
+  public Metrics Metrics { get; private set; }
+
+  [JsonPropertyName("glyphs")]
+  [JsonInclude]
+  public Glyph[] Glyphs { get; private set; }
+
+  [JsonPropertyName("kerning")]
+  [JsonInclude]
+  public Kerning[] Kerning { get; private set; }
+}

Engine/src/Asset/Font/Metadata/Metrics.cs

@@ -0,0 +1,31 @@
+using System.Text.Json.Serialization;
+
+namespace Engine.Asset.Font.Metadata;
+
+[JsonSerializable(typeof(Metrics))]
+[Serializable]
+public record Metrics
+{
+  [JsonPropertyName("emSize")]
+  [JsonInclude]
+  public float EmSize { get; private set; }
+
+  [JsonPropertyName("lineHeight")]
+  [JsonInclude]
+  public float LineHeight { get; private set; }
+
+  [JsonPropertyName("ascender")]
+  [JsonInclude]
+  public float Ascender { get; private set; }
+
+  [JsonPropertyName("descender")]
+  [JsonInclude]
+  public float Descender { get; private set; }
+
+  [JsonPropertyName("underlineY")]
+  [JsonInclude]
+  public float UnderlineY { get; private set; }
+
+  [JsonPropertyName("underlineThickness")]
+  public float UnderlineThickness { get; private set; }
+}

Engine/src/Asset/Image.cs

@@ -3,19 +3,19 @@ using Engine.Graphics.Texture;
 
 namespace Engine.Asset;
 
-public class Image<T>(T[,] parPixels)
-  where T : struct, IPixel
+public class Image<T> where T : struct, IPixel
 {
   public int Width { get; }
   public int Height { get; }
-  public T[,] Pixels { get; } = parPixels;
+  public T[,] Pixels { get; }
 
   public T this[int parY, int parX] => Pixels[parY, parX];
 
-  public Image(int parWidth, int parHeight) : this(new T[parHeight, parWidth])
+  public Image(int parWidth, int parHeight)
   {
     Width = parWidth;
     Height = parHeight;
+    Pixels = new T[parHeight, parWidth];
   }
 
   public DynamicTexture ToDynamicTexture()

Engine/src/Engine.cs

@@ -1,8 +1,16 @@
 using System.Diagnostics;
+using System.Text;
+using Engine.Asset;
+using Engine.Asset.Font;
+using Engine.Asset.Mesh;
 using Engine.Graphics;
+using Engine.Graphics.Pixel;
+using Engine.Graphics.Shader;
+using Engine.Graphics.Texture;
 using Engine.Input;
+using Engine.Resource;
+using Engine.Resource.Loader;
 using Engine.Scene;
-using OpenTK.Graphics.OpenGL;
 using OpenTK.Mathematics;
 using OpenTK.Windowing.Common;
 using OpenTK.Windowing.Desktop;
@@ -50,9 +58,15 @@ public sealed class Engine
   private IInputHandler? _inputHandler;
   private IPresenter? _presenter;
 
+  internal ResourceManager EngineResourceManager => _engineResourceManager;
+  public IResourceManager AssetResourceManager => _assetResourceManager;
+  private readonly ResourceManager _engineResourceManager;
+  private readonly ResourceManager _assetResourceManager;
+
   private Thread? _updateThread;
 
-  public Engine(int parWidth, int parHeight, bool parHeadless, string parTitle, ILogger parLogger)
+  public Engine(int parWidth, int parHeight, bool parHeadless, string parTitle, string parAssetFolder,
+    ILogger parLogger)
   {
     if (Instance != null)
     {
@@ -61,20 +75,59 @@ public sealed class Engine
 
     Instance = this;
 
+    Log.Logger = parLogger;
+    _logger = Log.ForContext<Engine>();
+
     var settings = new NativeWindowSettings
     {
       ClientSize = parHeadless ? new Vector2i(1, 1) : new Vector2i(parWidth, parHeight),
       Title = parTitle,
       StartVisible = !parHeadless,
       APIVersion = new Version(4, 6),
-      Profile = ContextProfile.Core
+      Profile = ContextProfile.Core,
+      DepthBits = 0,
+      StencilBits = 0
     };
 
-    Renderer = new Renderer(parWidth, parHeight, settings);
-    Window = new Window(this, Renderer.NativeWindow, parHeadless);
+    _engineResourceManager = CreateEngineResourceManager();
+    _assetResourceManager = CreateAssetResourceManager(parAssetFolder);
 
-    Log.Logger = parLogger;
-    _logger = Log.ForContext<Engine>();
+    _logger.Information("Created asset resource manager in {AssetFolder}", parAssetFolder);
+
+    Renderer = new Renderer(this, parWidth, parHeight, settings);
+    Window = new Window(this, Renderer.NativeWindow, parHeadless);
+  }
+
+  private static ResourceManager CreateEngineResourceManager()
+  {
+    var memoryStreamProvider = new MemoryResourceStreamProvider();
+    memoryStreamProvider.AddResource("shader/mesh", Encoding.UTF8.GetBytes(ShaderResource.Mesh));
+    memoryStreamProvider.AddResource("shader/quad", Encoding.UTF8.GetBytes(ShaderResource.Quad));
+    memoryStreamProvider.AddResource("shader/text", Encoding.UTF8.GetBytes(ShaderResource.Text));
+
+    var resourceManager = new ResourceManager(memoryStreamProvider);
+    RegisterDefaultLoaders(resourceManager);
+
+    return resourceManager;
+  }
+
+  private static ResourceManager CreateAssetResourceManager(string parAssetFolder)
+  {
+    var filesystemStreamProvider = new FilesystemResourceStreamProvider(parAssetFolder);
+
+    var resourceManager = new ResourceManager(filesystemStreamProvider);
+    RegisterDefaultLoaders(resourceManager);
+
+    return resourceManager;
+  }
+
+  private static void RegisterDefaultLoaders(ResourceManager parResourceManager)
+  {
+    parResourceManager.RegisterLoader<Program>(new ProgramLoader());
+    parResourceManager.RegisterLoader<Mesh>(new MeshLoader());
+    parResourceManager.RegisterLoader<Image<Rgba8>>(new ImageLoader());
+    parResourceManager.RegisterLoader<Texture>(new TextureLoader());
+    parResourceManager.RegisterLoader<Font>(new FontLoader());
   }
 
   private readonly object _sceneLock = new();
@@ -89,6 +142,11 @@ public sealed class Engine
     _updateThread.Join();
   }
 
+  public void Close()
+  {
+    Presenter?.Exit();
+  }
+
   private void RunRender()
   {
     while (!Presenter?.IsExiting ?? false)
@@ -114,18 +172,11 @@ public sealed class Engine
         SceneManager.Render();
       }
 
-      Renderer.QuadRenderer.Render(projection, view);
-      Renderer.QuadRenderer.Reset();
-
-      Renderer.GlobalMeshRenderer.Render(projection, view);
-      Renderer.GlobalMeshRenderer.Reset();
-
       Renderer.EndFrame(projection, view);
 
       Presenter!.Present(Renderer.RenderTexture);
       Presenter!.Render();
 
-
 #if DEBUG
       Debug.RenderDocEndFrame();
 #endif
@@ -143,9 +194,16 @@ public sealed class Engine
       InputHandler?.Update(deltaTime);
 
       lock (_sceneLock)
+      {
+        try
         {
           SceneManager.Update(deltaTime);
         }
+        catch (Exception ex)
+        {
+          _logger.Error(ex, "Exception in scene update");
+        }
+      }
 
       deltaTime = timer.Elapsed.TotalSeconds;
       timer.Restart();

Engine/src/EngineBuilder.cs

@@ -13,6 +13,7 @@ public sealed class EngineBuilder
   private bool _headless;
   private int _width = 1;
   private int _height = 1;
+  private string _assetFolder = "./";
 
   private Func<Engine, IPresenter>? _presenterFunc;
   private Func<Engine, IInputHandler>? _inputHandlerFunc;
@@ -51,6 +52,12 @@ public sealed class EngineBuilder
     return this;
   }
 
+  public EngineBuilder AssetFolder(string parAssetFolder)
+  {
+    _assetFolder = parAssetFolder;
+    return this;
+  }
+
   public EngineBuilder Presenter(Func<Engine, IPresenter> parPresenterFunc)
   {
     _presenterFunc = parPresenterFunc;
@@ -94,7 +101,7 @@ public sealed class EngineBuilder
   public Engine Build()
   {
     var logger = BuildLogger();
-    var engine = new Engine(_width, _height, _headless, _title, logger);
+    var engine = new Engine(_width, _height, _headless, _title, _assetFolder, logger);
 
     var presenter = _presenterFunc?.Invoke(engine);
     if (presenter != null)

Engine/src/Graphics/GenericRenderer.cs

@@ -1,6 +1,7 @@
 using Engine.Graphics.Pixel;
 using Engine.Graphics.Render.Mesh;
 using Engine.Graphics.Render.Quad;
+using Engine.Graphics.Render.Text;
 using OpenTK.Graphics.OpenGL;
 using OpenTK.Mathematics;
 
@@ -8,18 +9,23 @@ namespace Engine.Graphics;
 
 public class GenericRenderer : IRenderer
 {
-  public QuadRenderer QuadRenderer => _quadRenderer ??= new QuadRenderer(1024 * 8);
-  public GlobalMeshRenderer GlobalMeshRenderer => _globalMeshRenderer ??= new GlobalMeshRenderer(1024);
+  public QuadRenderer QuadRenderer => _quadRenderer ??= new QuadRenderer(_engine, 1024 * 8);
+  public AnyMeshRenderer AnyMeshRenderer => _globalMeshRenderer ??= new AnyMeshRenderer(_engine, 1024);
+  public TextRenderer TextRenderer => _textRenderer ??= new TextRenderer(_engine, 1024 * 8);
 
   private QuadRenderer? _quadRenderer;
-  private GlobalMeshRenderer? _globalMeshRenderer;
+  private AnyMeshRenderer? _globalMeshRenderer;
+  private TextRenderer? _textRenderer;
 
+  private readonly Engine _engine;
   internal readonly Framebuffer.Framebuffer _framebuffer;
 
   private bool _frameStarted;
 
-  public GenericRenderer(int parWidth, int parHeight)
+  public GenericRenderer(Engine parEngine, int parWidth, int parHeight)
   {
+    _engine = parEngine;
+
     _framebuffer = Framebuffer.Framebuffer.Builder(parWidth, parHeight)
       .AddColorAttachment<Rgba8>()
       .AddDepthAttachment()
@@ -38,14 +44,17 @@ public class GenericRenderer : IRenderer
 
     _framebuffer.Bind();
 
-    GL.ClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+    GL.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
     GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
 
     QuadRenderer.Render(parProjectionMatrix, parViewMatrix);
     QuadRenderer.Reset();
 
-    GlobalMeshRenderer.Render(parProjectionMatrix, parViewMatrix);
-    GlobalMeshRenderer.Reset();
+    AnyMeshRenderer.Render(parProjectionMatrix, parViewMatrix);
+    AnyMeshRenderer.Reset();
+
+    TextRenderer.Render(parProjectionMatrix, parViewMatrix);
+    TextRenderer.Reset();
 
     _framebuffer.Unbind();
 

Engine/src/Graphics/IPresenter.cs

@@ -13,4 +13,5 @@ public interface IPresenter : IUpdate, IRender
   event Action<ResizeEventArgs> Resize;
 
   void Present(IConstTexture parTexture);
+  void Exit();
 }

Engine/src/Graphics/Pipeline/RenderLayer.cs

@@ -1,18 +1,20 @@
 namespace Engine.Graphics.Pipeline;
 
-public class RenderLayer
+public class RenderLayer : IComparable<RenderLayer>
 {
-  public static readonly RenderLayer DEFAULT = new("default");
-  public static readonly RenderLayer HUD = new("hud");
-  public static readonly RenderLayer OVERLAY = new("overlay");
+  public static readonly RenderLayer DEFAULT = new("default", 0);
+  public static readonly RenderLayer OVERLAY = new("overlay", 1);
+  public static readonly RenderLayer HUD = new("hud", 2);
 
-  public static readonly IReadOnlyList<RenderLayer> ALL = new List<RenderLayer> { DEFAULT, HUD, OVERLAY }.AsReadOnly();
+  public static readonly IReadOnlyList<RenderLayer> ALL = new List<RenderLayer> { DEFAULT, OVERLAY, HUD }.AsReadOnly();
 
   public string Name { get; }
+  private readonly int _order;
 
-  private RenderLayer(string parName)
+  private RenderLayer(string parName, int parOrder)
   {
     Name = parName;
+    _order = parOrder;
   }
 
   public override string ToString()
@@ -20,6 +22,11 @@ public class RenderLayer
     return Name;
   }
 
+  public int CompareTo(RenderLayer? parOther)
+  {
+    return _order.CompareTo(parOther?._order);
+  }
+
   public override int GetHashCode()
   {
     return Name.GetHashCode();

Engine/src/Graphics/Render/InstancedRenderer.cs

@@ -50,6 +50,7 @@ public abstract class InstancedRenderer<C, I>
       return;
     }
 
+    if (DataChanged())
       _instanceVertexBuffer.UploadData(_instanceVertices, _queuedInstanceCount);
     _vertexArray.Bind();
 
@@ -71,4 +72,9 @@ public abstract class InstancedRenderer<C, I>
   protected virtual void SetAdditionalUniforms(Program parProgram)
   {
   }
+
+  protected virtual bool DataChanged()
+  {
+    return true;
+  }
 }

Engine/src/Graphics/Render/Mesh/AnyMeshRenderer.cs

@@ -3,23 +3,23 @@ using OpenTK.Mathematics;
 
 namespace Engine.Graphics.Render.Mesh;
 
-public class GlobalMeshRenderer(int parMaxInstanceCount)
+public class AnyMeshRenderer(Engine parEngine, int parMaxInstanceCount)
 {
   private readonly Dictionary<Asset.Mesh.Mesh, MeshRenderer> _meshRenderers = new();
   private readonly HashSet<Asset.Mesh.Mesh> _frameMeshes = [];
 
-  private readonly Program _program = ProgramLoader.LoadFromSource(ShaderResource.Mesh);
+  private readonly Program _program = parEngine.EngineResourceManager.Load<Program>("shader/mesh");
 
-  public void Commit(Asset.Mesh.Mesh parMesh, Matrix4 parModelMatrix)
+  public void Commit(Asset.Mesh.Mesh parMesh, Matrix4 parModelMatrix, Texture.Texture? parAlbedo = null)
   {
     if (_meshRenderers.TryGetValue(parMesh, out var meshRenderer))
     {
-      meshRenderer.Commit(parModelMatrix);
+      meshRenderer.Commit(parModelMatrix, parAlbedo);
     }
     else
     {
       var newMeshRenderer = new MeshRenderer(parMesh, parMaxInstanceCount, _program);
-      newMeshRenderer.Commit(parModelMatrix);
+      newMeshRenderer.Commit(parModelMatrix, parAlbedo);
 
       _meshRenderers.Add(parMesh, newMeshRenderer);
     }
@@ -42,11 +42,11 @@ public class GlobalMeshRenderer(int parMaxInstanceCount)
       meshRenderer.Reset();
     }
 
-    var meshes = _meshRenderers.Keys;
-    var unusedMeshes = meshes.Where(parMesh => !_frameMeshes.Contains(parMesh));
-    foreach (var unusedMesh in unusedMeshes)
+    var meshes = _meshRenderers.Keys.ToList();
+    foreach (var mesh in meshes)
     {
-      _meshRenderers.Remove(unusedMesh);
+      if (!_frameMeshes.Contains(mesh))
+        _meshRenderers.Remove(mesh);
     }
 
     _frameMeshes.Clear();

Engine/src/Graphics/Render/Mesh/MeshInstanceVertex.cs

@@ -8,4 +8,9 @@ public struct MeshInstanceVertex : IVertex
 {
   [Vertex(VertexAttribType.Int)] public int _textureId;
   [Vertex(VertexAttribType.Float, 4, 4)] public Matrix4 _modelMatrix;
+
+  public override int GetHashCode()
+  {
+    return HashCode.Combine(_textureId, _modelMatrix);
+  }
 }

Engine/src/Graphics/Render/Mesh/MeshRenderer.cs

@@ -17,6 +17,9 @@ public class MeshRenderer(Asset.Mesh.Mesh parMesh, int parInstanceCount, Program
   private readonly TextureUnitMap _textureUnitMap = new(16);
   private readonly int[] _textureUnitIndices = new int[16];
 
+  private int _frameHash;
+  private int _previousHash;
+
   public void Commit(Matrix4 parModelMatrix, Texture.Texture? parTexture = null)
   {
     if (_queuedInstanceCount >= _instanceCount)
@@ -32,6 +35,9 @@ public class MeshRenderer(Asset.Mesh.Mesh parMesh, int parInstanceCount, Program
 
     _instanceVertices[_queuedInstanceCount]._textureId = textureId;
     _instanceVertices[_queuedInstanceCount]._modelMatrix = parModelMatrix;
+
+    _frameHash = HashCode.Combine(_frameHash, _instanceVertices[_queuedInstanceCount]);
+
     _queuedInstanceCount++;
   }
 
@@ -45,4 +51,17 @@ public class MeshRenderer(Asset.Mesh.Mesh parMesh, int parInstanceCount, Program
 
     parProgram.SetUniform("uTexture", _textureUnitIndices);
   }
+
+  protected override bool DataChanged()
+  {
+    return _frameHash != _previousHash;
+  }
+
+  public override void Reset()
+  {
+    base.Reset();
+    _textureUnitMap.Reset();
+    _previousHash = _frameHash;
+    _frameHash = 0;
+  }
 }

Engine/src/Graphics/Render/Quad/QuadInstanceVertex.cs

@@ -9,4 +9,9 @@ public struct QuadInstanceVertex : IVertex
   [Vertex(VertexAttribType.Float, 4)] public Vector4 _color;
   [Vertex(VertexAttribType.Int)] public int _textureId;
   [Vertex(VertexAttribType.Float, 4, 4)] public Matrix4 _modelMatrix;
+
+  public override int GetHashCode()
+  {
+    return HashCode.Combine(_color, _textureId, _modelMatrix);
+  }
 }

Engine/src/Graphics/Render/Quad/QuadRenderer.cs

@@ -8,16 +8,20 @@ namespace Engine.Graphics.Render.Quad;
 public class QuadRenderer : InstancedRenderer<QuadCommonVertex, QuadInstanceVertex>
 {
   private readonly TextureUnitMap _textureUnitMap = new(16);
+
   private readonly int[] _textureUnitIndices = new int[16];
 
-  public QuadRenderer(int parInstanceCount)
-    : base(PrimitiveType.Triangles, parInstanceCount, [0, 1, 2, 2, 3, 0], [
-        new QuadCommonVertex { _position = new Vector3(-0.5f, -0.5f, 0), _uv = new Vector2(0, 1) },
-        new QuadCommonVertex { _position = new Vector3(0.5f, -0.5f, 0), _uv = new Vector2(1, 1) },
-        new QuadCommonVertex { _position = new Vector3(0.5f, 0.5f, 0), _uv = new Vector2(1, 0) },
-        new QuadCommonVertex { _position = new Vector3(-0.5f, 0.5f, 0), _uv = new Vector2(0, 0) }
+  private int _frameHash;
+  private int _previousHash;
+
+  public QuadRenderer(Engine parEngine, int parInstanceCount)
+    : base(PrimitiveType.Triangles, parInstanceCount, [0, 2, 1, 2, 3, 1], [
+        new QuadCommonVertex { _position = new Vector3(-0.5f, -0.5f, 0), _uv = new Vector2(0, 0) },
+        new QuadCommonVertex { _position = new Vector3(-0.5f, 0.5f, 0), _uv = new Vector2(0, 1) },
+        new QuadCommonVertex { _position = new Vector3(0.5f, -0.5f, 0), _uv = new Vector2(1, 0) },
+        new QuadCommonVertex { _position = new Vector3(0.5f, 0.5f, 0), _uv = new Vector2(1, 1) },
       ],
-      ProgramLoader.LoadFromSource(ShaderResource.Quad))
+      parEngine.EngineResourceManager.Load<Program>("shader/quad"))
   {
   }
 
@@ -37,6 +41,9 @@ public class QuadRenderer : InstancedRenderer<QuadCommonVertex, QuadInstanceVert
     _instanceVertices[_queuedInstanceCount]._modelMatrix = parModelMatrix;
     _instanceVertices[_queuedInstanceCount]._color = parColor;
     _instanceVertices[_queuedInstanceCount]._textureId = textureId;
+
+    _frameHash = HashCode.Combine(_frameHash, _instanceVertices[_queuedInstanceCount]);
+
     _queuedInstanceCount++;
   }
 
@@ -51,9 +58,16 @@ public class QuadRenderer : InstancedRenderer<QuadCommonVertex, QuadInstanceVert
     parProgram.SetUniform("uTexture", _textureUnitIndices);
   }
 
+  protected override bool DataChanged()
+  {
+    return _frameHash != _previousHash;
+  }
+
   public override void Reset()
   {
     base.Reset();
     _textureUnitMap.Reset();
+    _previousHash = _frameHash;
+    _frameHash = 0;
   }
 }

Engine/src/Graphics/Render/Text/GlyphCommonVertex.cs

@@ -0,0 +1,13 @@
+using Engine.Graphics.Buffer.Vertex;
+using OpenTK.Graphics.OpenGL;
+using OpenTK.Mathematics;
+
+namespace Engine.Graphics.Render.Text;
+
+public struct GlyphCommonVertex : IVertex
+{
+  [Vertex(VertexAttribType.Float, 4)] public Vector4 _color;
+  [Vertex(VertexAttribType.Int)] public int _atlasId;
+  [Vertex(VertexAttribType.Float, 2)] public Vector2 _unitRange;
+  [Vertex(VertexAttribType.Float, 4, 4)] public Matrix4 _modelMatrix;
+}

Engine/src/Graphics/Render/Text/GlyphVertex.cs

@@ -0,0 +1,15 @@
+using Engine.Graphics.Buffer.Vertex;
+using OpenTK.Graphics.OpenGL;
+using OpenTK.Mathematics;
+
+namespace Engine.Graphics.Render.Text;
+
+public struct GlyphVertex : IVertex
+{
+  [Vertex(VertexAttribType.Float, 2)] public Vector2 _position;
+  [Vertex(VertexAttribType.Float, 2)] public Vector2 _uv;
+  [Vertex(VertexAttribType.Float, 4)] public Vector4 _color;
+  [Vertex(VertexAttribType.Int)] public int _atlasId;
+  [Vertex(VertexAttribType.Float, 2)] public Vector2 _unitRange;
+  [Vertex(VertexAttribType.Float, 4, 4)] public Matrix4 _modelMatrix;
+}

Engine/src/Graphics/Render/Text/TextRenderer.cs

@@ -0,0 +1,125 @@
+using Engine.Asset.Font;
+using Engine.Graphics.Buffer;
+using Engine.Graphics.Shader;
+using Engine.Graphics.Texture;
+using OpenTK.Graphics.OpenGL;
+using OpenTK.Mathematics;
+
+namespace Engine.Graphics.Render.Text;
+
+public class TextRenderer
+{
+  private readonly IndexBuffer _indexBuffer;
+  private readonly VertexArray _vertexArray;
+
+  private readonly VertexBuffer<GlyphVertex> _glyphVertexBuffer;
+  // private readonly VertexBuffer<GlyphCommonVertex> _glyphCommonVertexBuffer;
+
+  private readonly Program _program;
+  private readonly int _characterCount;
+  private int _queuedCharacterCount;
+
+  private readonly TextureUnitMap _textureUnitMap = new(16);
+  private readonly int[] _textureUnitIndices = new int[16];
+
+  private readonly GlyphVertex[] _glyphVertices;
+  // private readonly GlyphCommonVertex[] _glyphCommonVertices;
+
+  public TextRenderer(Engine parEngine, int parCharacterCount)
+  {
+    _characterCount = parCharacterCount;
+    _glyphVertices = new GlyphVertex[parCharacterCount * 4];
+    // _glyphCommonVertices = new GlyphCommonVertex[parCharacterCount];
+
+    _program = parEngine.EngineResourceManager.Load<Program>("shader/text");
+
+    _indexBuffer = new IndexBuffer(CreateIndices(_characterCount));
+    _glyphVertexBuffer = new VertexBuffer<GlyphVertex>(_characterCount * 4,
+      BufferStorageFlags.DynamicStorageBit);
+    // _glyphCommonVertexBuffer = new VertexBuffer<GlyphCommonVertex>(_characterCount,
+    //   BufferStorageFlags.DynamicStorageBit);
+
+    _vertexArray = new VertexArray();
+
+    _vertexArray.BindIndexBuffer(_indexBuffer);
+    _vertexArray.BindVertexBuffer(_glyphVertexBuffer, 0, 0);
+    // _vertexArray.BindVertexBuffer(_glyphCommonVertexBuffer, 1, 1);
+  }
+
+  public void Commit(Font parFont, string parText, Vector4 parColor, in Matrix4 parModelMatrix)
+  {
+    if (_queuedCharacterCount >= _characterCount)
+    {
+      throw new InvalidOperationException("Character count exceeded");
+    }
+
+    var textureId = _textureUnitMap.GetUnit(parFont.AtlasTexture);
+
+    var fontIterator = parFont.Iterator(parText);
+
+    foreach (var glyphData in fontIterator)
+    {
+      for (var i = 0; i < 4; i++)
+      {
+        _glyphVertices[_queuedCharacterCount * 4 + i]._position = glyphData.Positions[i] + glyphData.Offset;
+        _glyphVertices[_queuedCharacterCount * 4 + i]._uv = glyphData.UVs[i];
+        _glyphVertices[_queuedCharacterCount * 4 + i]._color = parColor;
+        _glyphVertices[_queuedCharacterCount * 4 + i]._atlasId = textureId;
+        _glyphVertices[_queuedCharacterCount * 4 + i]._unitRange = parFont.UnitRange;
+        _glyphVertices[_queuedCharacterCount * 4 + i]._modelMatrix = parModelMatrix;
+      }
+
+      _queuedCharacterCount++;
+    }
+  }
+
+  public void Render(in Matrix4 parProjectionMatrix, in Matrix4 parViewMatrix)
+  {
+    if (_queuedCharacterCount <= 0)
+    {
+      return;
+    }
+
+    _glyphVertexBuffer.UploadData(_glyphVertices, _queuedCharacterCount * 4);
+    // _glyphCommonVertexBuffer.UploadData(_glyphCommonVertices, _queuedCharacterCount);
+    _vertexArray.Bind();
+
+    _program.Bind();
+    _program.SetUniform("u_Projection", in parProjectionMatrix);
+    _program.SetUniform("u_View", in parViewMatrix);
+    foreach (var (texture, unit) in _textureUnitMap.Textures)
+    {
+      texture.BindUnit(unit);
+      _textureUnitIndices[unit] = unit;
+    }
+
+    _program.SetUniform("u_Atlas", _textureUnitIndices);
+
+    GL.DrawElements(PrimitiveType.Triangles, _queuedCharacterCount * 6, DrawElementsType.UnsignedInt, 0);
+  }
+
+  public void Reset()
+  {
+    _textureUnitMap.Reset();
+    _queuedCharacterCount = 0;
+  }
+
+  private static uint[] CreateIndices(int parCharacterCount)
+  {
+    var indices = new uint[parCharacterCount * 6];
+
+    for (var i = 0; i < parCharacterCount; i++)
+    {
+      var index = i * 6;
+      var offset = i * 4;
+      indices[index + 0] = (uint)offset + 0;
+      indices[index + 1] = (uint)offset + 2;
+      indices[index + 2] = (uint)offset + 1;
+      indices[index + 3] = (uint)offset + 2;
+      indices[index + 4] = (uint)offset + 3;
+      indices[index + 5] = (uint)offset + 1;
+    }
+
+    return indices;
+  }
+}

Engine/src/Graphics/Renderer.cs

@@ -1,10 +1,11 @@
-using Engine.Graphics.Pipeline;
+using System.Collections.Generic;
+using Engine.Graphics.Pipeline;
 using Engine.Graphics.Pixel;
-using Engine.Graphics.Render.Mesh;
 using Engine.Graphics.Render.Quad;
 using OpenTK.Graphics.OpenGL;
 using OpenTK.Mathematics;
 using OpenTK.Windowing.Desktop;
+using Serilog;
 
 namespace Engine.Graphics;
 
@@ -13,12 +14,22 @@ public class Renderer
   internal Framebuffer.Framebuffer RenderFramebuffer => _framebuffer;
   internal Texture.Texture RenderTexture => _framebuffer.TextureInternal!;
 
-  public QuadRenderer QuadRenderer { get; }
-  public GlobalMeshRenderer GlobalMeshRenderer { get; }
+  private QuadRenderer QuadRenderer { get; }
   public int ViewportWidth => _framebuffer.Width;
   public int ViewportHeight => _framebuffer.Height;
 
-  private readonly Dictionary<RenderLayer, GenericRenderer> _renderers = new();
+  private readonly SortedDictionary<RenderLayer, GenericRenderer> _renderers = new();
+
+  public GenericRenderer this[RenderLayer parRenderLayer]
+  {
+    get
+    {
+      if (_renderers.TryGetValue(parRenderLayer, out var renderer))
+        return renderer;
+
+      throw new InvalidOperationException($"Renderer for layer {parRenderLayer} not found");
+    }
+  }
 
   internal NativeWindow NativeWindow { get; }
 
@@ -27,9 +38,10 @@ public class Renderer
 
   private readonly Queue<Action> _scheduleActions = new();
 
-  public Renderer(int parWidth, int parHeight, NativeWindowSettings parSettings)
+  public Renderer(Engine parEngine, int parWidth, int parHeight, NativeWindowSettings parSettings)
   {
-    Thread.CurrentThread.Name = "RendererThread";
+    _renderThread = Thread.CurrentThread;
+    _renderThread.Name = "RendererThread";
 
 #if DEBUG
     Debug.InitializeRenderDoc();
@@ -39,15 +51,16 @@ public class Renderer
 
     InitializeOpenGl(parWidth, parHeight);
 
-    _renderThread = Thread.CurrentThread;
-
     _framebuffer = Framebuffer.Framebuffer.Builder(parWidth, parHeight)
-      .AddColorAttachment<Rgb8>()
-      .AddDepthAttachment()
+      .AddColorAttachment<Rgba8>()
       .Build();
 
-    QuadRenderer = new QuadRenderer(1024 * 8);
-    GlobalMeshRenderer = new GlobalMeshRenderer(1024);
+    QuadRenderer = new QuadRenderer(parEngine, 1);
+
+    foreach (var layer in RenderLayer.ALL)
+    {
+      _renderers.Add(layer, new GenericRenderer(parEngine, parWidth, parHeight));
+    }
   }
 
   private void InitializeOpenGl(int parWidth, int parHeight)
@@ -57,6 +70,7 @@ public class Renderer
 #endif
 
     GL.Enable(EnableCap.DepthTest);
+    // GL.Enable(EnableCap.CullFace);
 
     // GL.Enable(EnableCap.FramebufferSrgb);
 
@@ -81,39 +95,63 @@ public class Renderer
     _scheduleActions.Enqueue(parAction);
   }
 
+  internal Task<T> Schedule<T>(Func<T> parAction)
+  {
+    var completionSource = new TaskCompletionSource<T>();
+
+    Schedule(() =>
+    {
+      try
+      {
+        completionSource.SetResult(parAction());
+      }
+      catch (Exception ex)
+      {
+        completionSource.SetException(ex);
+      }
+    });
+
+    return completionSource.Task;
+  }
+
   internal void StartFrame()
   {
     EnsureRenderThread();
 
     RunScheduledActions();
 
-    _framebuffer.Bind();
-
-    GL.ClearColor(0.0f, 0.0f, 0.0f, 1.0f);
-    GL.Clear(ClearBufferMask.ColorBufferBit);
-
-    // foreach (var renderer in _renderers.Values)
-    // {
-    //   renderer.StartFrame();
-    // }
+    foreach (var renderer in _renderers.Values)
+    {
+      renderer.StartFrame();
+    }
   }
 
   internal void EndFrame(in Matrix4 parViewMatrix, in Matrix4 parProjectionMatrix)
   {
     EnsureRenderThread();
 
-    // foreach (var renderer in _renderers.Values)
-    // {
-    //   renderer.EndFrame(in parViewMatrix, in parProjectionMatrix);
-    // }
-    //
-    // foreach (var renderer in _renderers.Values)
-    // {
-    //   QuadRenderer.Commit(Matrix4.CreateScale(2f), Vector4.One, renderer._framebuffer.TextureInternal);
-    // }
-    //
-    // QuadRenderer.Render(in parProjectionMatrix, in parViewMatrix);
-    // QuadRenderer.Reset();
+    foreach (var renderer in _renderers.Values)
+    {
+      renderer.EndFrame(in parViewMatrix, in parProjectionMatrix);
+    }
+
+    _framebuffer.Bind();
+
+    // GL.Disable(EnableCap.DepthTest);
+    // GL.Disable(EnableCap.CullFace);
+
+    GL.ClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+    GL.Clear(ClearBufferMask.ColorBufferBit);
+
+    foreach (var renderer in _renderers.Values)
+    {
+      QuadRenderer.Commit(Matrix4.CreateScale(2f, -2f, 1f), Vector4.One, renderer._framebuffer.TextureInternal);
+      QuadRenderer.Render(Matrix4.Identity, Matrix4.Identity);
+      QuadRenderer.Reset();
+    }
+
+    // GL.Enable(EnableCap.DepthTest);
+    // GL.Enable(EnableCap.CullFace);
 
     _framebuffer.Unbind();
   }
@@ -122,6 +160,11 @@ public class Renderer
   {
     _framebuffer.Resize(parWidth, parHeight);
     GL.Viewport(0, 0, parWidth, parHeight);
+
+    foreach (var renderer in _renderers.Values)
+    {
+      renderer.Resize(parWidth, parHeight);
+    }
   }
 
   private void RunScheduledActions()

Engine/src/Graphics/Shader/Program.cs

@@ -125,6 +125,8 @@ public class Program : OpenGlObject
       if (linkStatus == 0)
       {
         var log = GL.GetProgramInfoLog(programId);
+        GL.DeleteProgram(programId);
+
         throw new ShaderLinkException(log);
       }
 
@@ -133,11 +135,15 @@ public class Program : OpenGlObject
       if (validateStatus == 0)
       {
         var log = GL.GetProgramInfoLog(programId);
+        GL.DeleteProgram(programId);
+
         throw new ShaderValidationException(log);
       }
     }
     finally
     {
+      GL.DetachShader(programId, parVertexShader);
+      GL.DetachShader(programId, parFragmentShader);
       GL.DeleteShader(parVertexShader);
       GL.DeleteShader(parFragmentShader);
     }

Engine/src/Graphics/Texture/Texture.cs

@@ -123,7 +123,6 @@ public abstract class Texture : OpenGlObject, ITexture
 
   public void BindUnit(int parUnit = 0)
   {
-    GL.ActiveTexture(TextureUnit.Texture0 + parUnit);
     GL.BindTextureUnit(parUnit, Handle);
   }
 

Engine/src/Input/IInputHandler.cs

@@ -1,9 +1,12 @@
 using Engine.Scene;
+using OpenTK.Mathematics;
 
 namespace Engine.Input;
 
 public interface IInputHandler : IUpdate
 {
+  Vector2 MousePosition { get; }
+
   bool IsKeyPressed(KeyboardButtonCode parKeyboardButtonCode);
   bool IsKeyJustPressed(KeyboardButtonCode parKeyboardButtonCode);
 

Engine/src/Input/WindowInputHandler.cs

@@ -1,16 +1,25 @@
-using OpenTK.Windowing.GraphicsLibraryFramework;
+using OpenTK.Mathematics;
+using OpenTK.Windowing.GraphicsLibraryFramework;
 
 namespace Engine.Input;
 
 public class WindowInputHandler(Window parWindow) : IInputHandler
 {
+  public Vector2 MousePosition => parWindow.NativeWindow.MouseState.Position;
+
   private KeyboardState _previousKeyboardState = parWindow.NativeWindow.KeyboardState.GetSnapshot();
   private KeyboardState _keyboardState = parWindow.NativeWindow.KeyboardState.GetSnapshot();
 
+  private MouseState _previousMouseState = parWindow.NativeWindow.MouseState.GetSnapshot();
+  private MouseState _mouseState = parWindow.NativeWindow.MouseState.GetSnapshot();
+
   public void Update(double parDeltaTime)
   {
     _previousKeyboardState = _keyboardState;
     _keyboardState = parWindow.NativeWindow.KeyboardState.GetSnapshot();
+
+    _previousMouseState = _mouseState;
+    _mouseState = parWindow.NativeWindow.MouseState.GetSnapshot();
   }
 
   public bool IsKeyPressed(KeyboardButtonCode parKeyboardButtonCode)
@@ -26,12 +35,13 @@ public class WindowInputHandler(Window parWindow) : IInputHandler
 
   public bool IsMouseButtonPressed(MouseButtonCode parButtonCode)
   {
-    return parWindow.NativeWindow.MouseState.IsButtonDown(MapMouseButtonCode(parButtonCode));
+    return _mouseState.IsButtonDown(MapMouseButtonCode(parButtonCode));
   }
 
   public bool IsMouseButtonJustPressed(MouseButtonCode parButtonCode)
   {
-    return parWindow.NativeWindow.MouseState.IsButtonPressed(MapMouseButtonCode(parButtonCode));
+    return _mouseState.IsButtonDown(MapMouseButtonCode(parButtonCode)) &&
+           !_previousMouseState.IsButtonDown(MapMouseButtonCode(parButtonCode));
   }
 
   private static MouseButton MapMouseButtonCode(MouseButtonCode parButton)

Engine/src/Resource/FilesystemResourceStreamProvider.cs

@@ -0,0 +1,9 @@
+namespace Engine.Resource;
+
+public class FilesystemResourceStreamProvider(string parBasePath) : IResourceStreamProvider
+{
+  public Stream GetStream(string parPath)
+  {
+    return File.OpenRead(Path.Combine(parBasePath, parPath));
+  }
+}

Engine/src/Resource/IResourceLoader.cs

@@ -0,0 +1,6 @@
+namespace Engine.Resource;
+
+public interface IResourceLoader
+{
+  object Load(string parPath, IResourceStreamProvider parStreamProvider);
+}

Engine/src/Resource/IResourceManager.cs

@@ -0,0 +1,6 @@
+namespace Engine.Resource;
+
+public interface IResourceManager
+{
+  T Load<T>(string parPath) where T : class;
+}

Engine/src/Resource/IResourceStreamProvider.cs

@@ -0,0 +1,6 @@
+namespace Engine.Resource;
+
+public interface IResourceStreamProvider
+{
+  Stream GetStream(string parPath);
+}

Engine/src/Resource/Loader/FontLoader.cs

@@ -0,0 +1,26 @@
+using System.Text.Json;
+using Engine.Asset.Font;
+using Engine.Asset.Font.Metadata;
+
+namespace Engine.Resource.Loader;
+
+public class FontLoader : IResourceLoader
+{
+  public object Load(string parPath, IResourceStreamProvider parStreamProvider)
+  {
+    var metadataPath = Path.Combine(parPath, "metadata.json");
+    using var metadataStream = parStreamProvider.GetStream(metadataPath);
+    var metadata = JsonSerializer.Deserialize<Metadata>(metadataStream);
+
+    if (metadata == null)
+    {
+      throw new InvalidOperationException($"Failed to load metadata from {metadataPath}");
+    }
+
+    var atlasPath = Path.Combine(parPath, "atlas.png");
+    using var atlasStream = parStreamProvider.GetStream(atlasPath);
+    var atlasTexture = ImageLoader.Load(atlasStream).ToStaticTexture();
+
+    return new Font(atlasTexture, metadata);
+  }
+}

Engine/src/Resource/Loader/ImageLoader.cs

@@ -0,0 +1,35 @@
+using System.Runtime.InteropServices;
+using Engine.Graphics.Pixel;
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+
+namespace Engine.Resource.Loader;
+
+public class ImageLoader : IResourceLoader
+{
+  public object Load(string parPath, IResourceStreamProvider parStreamProvider)
+  {
+    using var stream = parStreamProvider.GetStream(parPath);
+    return Load(stream);
+  }
+
+  internal static Asset.Image<Rgba8> Load(Stream parStream)
+  {
+    var sharpImage = SixLabors.ImageSharp.Image.Load<Rgba32>(parStream);
+    if (sharpImage == null)
+    {
+      throw new InvalidOperationException($"Failed to load image from stream");
+    }
+
+    sharpImage.Mutate(parImageContext => parImageContext.Flip(FlipMode.Vertical));
+
+    var image = new Asset.Image<Rgba8>(sharpImage.Width, sharpImage.Height);
+    var span = MemoryMarshal.CreateSpan(ref MemoryMarshal.GetArrayDataReference(image.Pixels),
+      image.Pixels.Length * Marshal.SizeOf<Rgba8>());
+    sharpImage.CopyPixelDataTo(span);
+
+    return image;
+  }
+}

Engine/src/Resource/Loader/MeshLoader.cs

@@ -0,0 +1,19 @@
+using Engine.Asset.Mesh.Loader;
+
+namespace Engine.Resource.Loader;
+
+public class MeshLoader : IResourceLoader
+{
+  public object Load(string parPath, IResourceStreamProvider parStreamProvider)
+  {
+    var extension = Path.GetExtension(parPath);
+    using var reader = new StreamReader(parStreamProvider.GetStream(parPath));
+
+    return extension switch
+    {
+      ".obj" => ObjMeshLoader.Load(reader),
+      ".stl" => StlMeshLoader.Load(reader),
+      _ => throw new InvalidOperationException($"Unsupported mesh format: {extension}")
+    };
+  }
+}

Engine/src/Resource/Loader/ProgramLoader.cs

@@ -1,21 +1,24 @@
 using System.Text;
 using System.Text.RegularExpressions;
+using Engine.Graphics.Shader;
 
-namespace Engine.Graphics.Shader;
+namespace Engine.Resource.Loader;
 
-public static partial class ProgramLoader
+public partial class ProgramLoader : IResourceLoader
 {
   [GeneratedRegex(@"^//\s+#type\s+(?<type>[a-z]+)$", RegexOptions.Compiled)]
   private static partial Regex TypeRegex();
 
-  public static Program LoadFromSource(string parSource)
+  public object Load(string parPath, IResourceStreamProvider parStreamProvider)
   {
+    var textReader = new StreamReader(parStreamProvider.GetStream(parPath));
+
     var vertexSource = new StringBuilder();
     var fragmentSource = new StringBuilder();
     var inFragment = false;
     var inVertex = false;
 
-    foreach (var line in parSource.Split('\n').Select(parLine => parLine.TrimEnd()))
+    while (textReader.ReadLine() is { } line)
     {
       var match = TypeRegex().Match(line);
       if (match.Success)

Engine/src/Resource/Loader/TextureLoader.cs

@@ -0,0 +1,12 @@
+namespace Engine.Resource.Loader;
+
+public class TextureLoader : IResourceLoader
+{
+  public object Load(string parPath, IResourceStreamProvider parStreamProvider)
+  {
+    using var stream = parStreamProvider.GetStream(parPath);
+    var image = ImageLoader.Load(stream);
+
+    return image.ToStaticTexture();
+  }
+}

Engine/src/Resource/MemoryResourceStreamProvider.cs

@@ -0,0 +1,16 @@
+namespace Engine.Resource;
+
+public class MemoryResourceStreamProvider : IResourceStreamProvider
+{
+  private readonly Dictionary<string, byte[]> _resources = new();
+
+  public Stream GetStream(string parPath)
+  {
+    return new MemoryStream(_resources[parPath]);
+  }
+
+  internal void AddResource(string parPath, byte[] parData)
+  {
+    _resources.Add(parPath, parData);
+  }
+}

Engine/src/Resource/ResourceHandle.cs

@@ -0,0 +1,36 @@
+namespace Engine.Resource;
+
+public class ResourceHandle<T>
+{
+  public T? Value
+  {
+    get
+    {
+      if (_isLoaded)
+      {
+        return _value!;
+      }
+
+      if (!_task.IsCompleted)
+      {
+        return _defaultValue;
+      }
+
+      _value = _task.Result;
+      _isLoaded = true;
+
+      return _value!;
+    }
+  }
+
+  private readonly T? _defaultValue;
+  private readonly Task<T> _task;
+  private T? _value;
+  private bool _isLoaded;
+
+  public ResourceHandle(Task<T> parTask, T? parDefaultValue)
+  {
+    _defaultValue = parDefaultValue;
+    _task = parTask;
+  }
+}

Engine/src/Resource/ResourceManager.cs

@@ -0,0 +1,71 @@
+namespace Engine.Resource;
+
+public class ResourceManager : IResourceManager
+{
+  internal IResourceStreamProvider StreamProvider => _streamProvider;
+
+  private readonly IResourceStreamProvider _streamProvider;
+  private readonly Dictionary<Type, IResourceLoader> _loaders = new();
+  private readonly Dictionary<Type, ResourceStorage> _storages = new();
+
+  public ResourceManager(IResourceStreamProvider parStreamProvider)
+  {
+    _streamProvider = parStreamProvider;
+  }
+
+  internal void RegisterLoader<T>(IResourceLoader parLoader) where T : class
+  {
+    _loaders.Add(typeof(T), parLoader);
+  }
+
+  public T Load<T>(string parPath) where T : class
+  {
+    if (!_storages.TryGetValue(typeof(T), out var storage))
+    {
+      storage = new ResourceStorage();
+      _storages.Add(typeof(T), storage);
+    }
+
+    if (storage.Get<T>(parPath) is { } cachedResource)
+    {
+      return cachedResource;
+    }
+
+    var loader = _loaders.GetValueOrDefault(typeof(T));
+    if (loader == null)
+    {
+      throw new InvalidOperationException($"No loader found for type {typeof(T)}");
+    }
+
+    var resource = loader.Load(parPath, _streamProvider);
+
+    storage.Add(parPath, resource);
+
+    return (T)resource;
+  }
+
+  internal void Reset()
+  {
+    _storages.Clear();
+  }
+
+  private class ResourceStorage
+  {
+    private readonly Dictionary<string, object> _resources = new();
+
+    public void Add<T>(string parPath, T parResource) where T : class
+    {
+      _resources.Add(parPath, parResource);
+    }
+
+    public T? Get<T>(string parPath) where T : class
+    {
+      return _resources.TryGetValue(parPath, out var resource) ? (T)resource : null;
+    }
+
+    public void Remove(string parPath)
+    {
+      _resources.Remove(parPath);
+    }
+  }
+}

Engine/src/Resource/ShaderResource.Designer.cs

@@ -59,33 +59,6 @@ namespace Engine {
             }
         }
 
-        /// <summary>
-        ///   Looks up a localized string similar to #shader vertex
-        ///#version 330 core
-        ///
-        ///uniform mat4 uViewMatrix;
-        ///uniform mat4 uProjectionMatrix;
-        ///
-        ///layout(location = 0) in vec3 aPos;
-        ///layout(location = 1) in vec3 aNormal;
-        ///layout(location = 2) in vec2 aTexCoords;
-        ///layout(location = 3) in mat4 aModelMatrix;
-        ///
-        ///out vec2 outTexCoords;
-        ///
-        ///void main()
-        ///{
-        ///    gl_Position = uProjectionMatrix * uViewMatrix * aModelMatrix * vec4(aPos, 1.0);
-        ///    outTexCoords = aTexCoords;
-        ///}
-        ///
-        ///#shader fragment
-        ///#version 330 core
-        ///
-        ///uniform sampler2D uTexture;
-        ///
-        ///layout(location  [rest of string was truncated]&quot;;.
-        /// </summary>
         internal static string Mesh {
             get {
                 return ResourceManager.GetString("Mesh", resourceCulture);
@@ -97,5 +70,11 @@ namespace Engine {
             return ResourceManager.GetString("Quad", resourceCulture);
           }
         }
+
+        internal static string Text {
+          get {
+            return ResourceManager.GetString("Text", resourceCulture);
+          }
+        }
     }
 }

Engine/src/Resource/ShaderResource.resx

@@ -31,4 +31,8 @@
     <data name="Quad" type="System.Resources.ResXFileRef" xml:space="preserve">
         <value>../../assets/shader/quad.shader;System.String, mscorlib, Version=4.0.0.0, Culture=neutral;utf-8</value>
     </data>
+
+    <data name="Text" type="System.Resources.ResXFileRef" xml:space="preserve">
+        <value>../../assets/shader/text.shader;System.String, mscorlib, Version=4.0.0.0, Culture=neutral;utf-8</value>
+    </data>
 </root>

Engine/src/Scene/Component/BuiltIn/OrthographicCamera.cs

@@ -13,28 +13,62 @@ public class OrthographicCamera(
 {
   public Axis FixedAxis { get; set; } = parAxis;
   public float Size { get; set; } = parSize;
+  public bool UseScreenSize { get; set; } = false;
 
   public override Matrix4 View => GameObject.Transform.TransformMatrix.Inverted();
 
-  public override Matrix4 Projection => FixedAxis == Axis.X
-    ? Matrix4.CreateOrthographic(Size, -Size / AspectRatio, NearPlane, FarPlane)
-    : Matrix4.CreateOrthographic(Size * AspectRatio, -Size, NearPlane, FarPlane);
+  public override Matrix4 Projection => GetProjectionMatrix();
+
+  private Matrix4 GetProjectionMatrix()
+  {
+    var size = GameObject.Transform.Size.Xy;
+    return Matrix4.CreateOrthographic(size.X, size.Y, -NearPlane, -FarPlane);
+  }
 
   public override Vector3 ScreenToWorld(Vector2 parScreenPosition)
   {
-    var offset = FixedAxis == Axis.X
-      ? new Vector2(Size, Size / AspectRatio)
-      : new Vector2(Size * AspectRatio, Size);
-    offset /= 2;
+    var normalized = parScreenPosition / ScreenSize - new Vector2(0.5f);
+    normalized.X *= 2;
+    normalized.Y *= -2;
 
-    return new Vector4(parScreenPosition.X - offset.X, parScreenPosition.Y - offset.Y, 0, 1)
+    return new Vector4(normalized.X, normalized.Y, 0, 1)
+      .MulProject(Projection.Inverted())
       .MulProject(GameObject.Transform.TransformMatrix)
       .Xyz;
   }
 
   public override Vector2 WorldToScreen(Vector3 parWorldPosition)
   {
-    throw new NotImplementedException();
+    var normalized = new Vector4(parWorldPosition, 1)
+      .MulProject(GameObject.Transform.TransformMatrix.Inverted())
+      .MulProject(Projection)
+      .Xy;
+
+    normalized.X /= 2;
+    normalized.Y /= -2;
+
+    return (normalized + new Vector2(0.5f)) * ScreenSize;
+  }
+
+  public override void Update(double parDeltaTime)
+  {
+    if (UseScreenSize)
+    {
+      GameObject.Transform.Size.Xy = ScreenSize.ToVector2();
+    }
+    else
+    {
+      if (FixedAxis == Axis.X)
+      {
+        GameObject.Transform.Size.X = Size;
+        GameObject.Transform.Size.Y = Size / AspectRatio;
+      }
+      else
+      {
+        GameObject.Transform.Size.X = Size * AspectRatio;
+        GameObject.Transform.Size.Y = Size;
+      }
+    }
   }
 
   public enum Axis

Engine/src/Scene/Component/BuiltIn/PerspectiveCamera.cs

@@ -1,11 +1,10 @@
 using Engine.Util;
 using OpenTK.Mathematics;
-using Math = System.Math;
 
 namespace Engine.Scene.Component.BuiltIn;
 
 public class PerspectiveCamera(
-  float parFieldOfView = 90.0f,
+  float parFieldOfView = 60.0f,
   float parNearPlane = 0.01f,
   float parFarPlane = 1000f
 )
@@ -18,9 +17,9 @@ public class PerspectiveCamera(
     get
     {
       var transformMatrix = GameObject.Transform.TransformMatrix;
-      var forward = new Vector4(0, 0, 1, 1).MulProject(transformMatrix);
-      var eye = new Vector4(0, 0, 0, 1).MulProject(transformMatrix);
-      var up = (new Vector4(0, -1, 0, 1).MulProject(transformMatrix) - eye).Normalized();
+      var forward = new Vector4(0, 1, 0, 1).MulProject(in transformMatrix);
+      var eye = new Vector4(0, 0, 0, 1).MulProject(in transformMatrix);
+      var up = (new Vector4(0, 0, 1, 1).MulProject(in transformMatrix) - eye).Normalized();
 
       return Matrix4.LookAt(eye.Xyz, forward.Xyz, up.Xyz);
     }
@@ -32,11 +31,26 @@ public class PerspectiveCamera(
 
   public override Vector3 ScreenToWorld(Vector2 parScreenPosition)
   {
-    throw new NotImplementedException();
+    var normalized = parScreenPosition / ScreenSize - new Vector2(0.5f);
+    normalized.X *= 2;
+    normalized.Y *= -2;
+
+    return new Vector4(normalized.X, normalized.Y, 0, 1)
+      .MulProject(Projection.Inverted())
+      .MulProject(GameObject.Transform.TransformMatrix)
+      .Xyz;
   }
 
   public override Vector2 WorldToScreen(Vector3 parWorldPosition)
   {
-    throw new NotImplementedException();
+    var normalized = new Vector4(parWorldPosition, 1)
+      .MulProject(GameObject.Transform.TransformMatrix.Inverted())
+      .MulProject(Projection)
+      .Xy;
+
+    normalized.X /= 2;
+    normalized.Y /= -2;
+
+    return (normalized + new Vector2(0.5f)) * ScreenSize;
   }
 }

Engine/src/Scene/Component/BuiltIn/Renderer/Box2DRenderer.cs

@@ -1,4 +1,5 @@
-using Engine.Graphics.Texture;
+using Engine.Graphics.Pipeline;
+using Engine.Graphics.Texture;
 using OpenTK.Mathematics;
 
 namespace Engine.Scene.Component.BuiltIn.Renderer;
@@ -7,11 +8,13 @@ public class Box2DRenderer : Component
 {
   public ref Vector4 Color => ref _color;
   public Texture? Texture { get; set; } = null;
+  public RenderLayer RenderLayer { get; set; } = RenderLayer.DEFAULT;
 
   private Vector4 _color = Vector4.One;
 
   public override void Render()
   {
-    Engine.Instance.Renderer.QuadRenderer.Commit(GameObject.Transform.TransformMatrix, Color, Texture);
+    Engine.Instance.Renderer[RenderLayer].QuadRenderer
+      .Commit(GameObject.Transform.FullTransformMatrix, Color, Texture);
   }
 }

Engine/src/Scene/Component/BuiltIn/Renderer/MeshRenderer.cs

@@ -1,13 +1,18 @@
 using Engine.Asset.Mesh;
+using Engine.Graphics.Pipeline;
+using Engine.Graphics.Texture;
 
 namespace Engine.Scene.Component.BuiltIn.Renderer;
 
 public class MeshRenderer : Component
 {
   public Mesh Mesh { get; set; } = null!;
+  public Texture? Albedo { get; set; } = null;
+  public RenderLayer RenderLayer { get; set; } = RenderLayer.DEFAULT;
 
   public override void Render()
   {
-    Engine.Instance.Renderer.GlobalMeshRenderer.Commit(Mesh, GameObject.Transform.TransformMatrix);
+    Engine.Instance.Renderer[RenderLayer].AnyMeshRenderer
+      .Commit(Mesh, GameObject.Transform.FullTransformMatrix, Albedo);
   }
 }

Engine/src/Scene/Component/BuiltIn/Renderer/TextRenderer.cs

@@ -0,0 +1,25 @@
+using Engine.Asset.Font;
+using Engine.Graphics.Pipeline;
+using OpenTK.Mathematics;
+
+namespace Engine.Scene.Component.BuiltIn.Renderer;
+
+public class TextRenderer : Component
+{
+  public Font Font { get; set; } = null!;
+  public string? Text { get; set; }
+  public ref Vector4 Color => ref _color;
+
+  public RenderLayer RenderLayer { get; set; } = RenderLayer.DEFAULT;
+
+  private Vector4 _color = Vector4.One;
+
+  public override void Render()
+  {
+    if (Text == null)
+      return;
+
+    Engine.Instance.Renderer[RenderLayer].TextRenderer
+      .Commit(Font, Text, Color, GameObject.Transform.FullTransformMatrix);
+  }
+}

Engine/src/Scene/Component/BuiltIn/Transform.cs

@@ -7,12 +7,12 @@ public class Transform : Component
   private Vector3 _translation = Vector3.Zero;
   private Quaternion _rotation = Quaternion.Identity;
   private Vector3 _scale = Vector3.One;
-  private Vector3 _localScale = Vector3.One;
+  private Vector3 _size = Vector3.One;
 
   public ref Vector3 Translation => ref _translation;
   public ref Quaternion Rotation => ref _rotation;
   public ref Vector3 Scale => ref _scale;
-  public ref Vector3 LocalScale => ref _localScale;
+  public ref Vector3 Size => ref _size;
 
   public Matrix4 LocalTransformMatrix => Matrix4.CreateScale(Scale) *
                                          Matrix4.CreateFromQuaternion(Rotation) *
@@ -20,6 +20,8 @@ public class Transform : Component
 
   public Matrix4 TransformMatrix => LocalTransformMatrix * ParentTransformMatrix;
 
+  public Matrix4 FullTransformMatrix => Matrix4.CreateScale(Size) * TransformMatrix;
+
   private Matrix4 ParentTransformMatrix
   {
     get
@@ -32,7 +34,7 @@ public class Transform : Component
   public Transform Clone()
   {
     var clone =
-      new Transform { Translation = Translation, Rotation = Rotation, Scale = Scale, LocalScale = LocalScale };
+      new Transform { Translation = Translation, Rotation = Rotation, Scale = Scale, Size = Size };
 
     return clone;
   }

Engine/src/Scene/Scene.cs

@@ -28,7 +28,7 @@ public class Scene : IUpdate, IRender
 
   public T? FindFirstComponent<T>() where T : Component.Component
   {
-    return Hierarchy.Objects.Select(parGameObject => parGameObject.GetComponent<T>()).FirstOrDefault();
+    return Hierarchy.Objects.Select(parGameObject => parGameObject.GetComponent<T>()).FirstOrDefault(parComponent => parComponent != null);
   }
 
   public void Update(double parDeltaTime)
@@ -87,10 +87,15 @@ public class Scene : IUpdate, IRender
     });
   }
 
-  public void AddChild(GameObject parParent, GameObject parGameObject)
+  public void SetChild(GameObject parParent, GameObject parChild)
   {
-    Add(parGameObject);
-    Hierarchy.AddChild(parParent, parGameObject);
+    Hierarchy.AddChild(parParent, parChild);
+  }
+
+  public void AddChild(GameObject parParent, GameObject parChild)
+  {
+    Add(parChild);
+    SetChild(parParent, parChild);
   }
 
   public void Remove(GameObject parGameObject)
@@ -115,14 +120,14 @@ public class Scene : IUpdate, IRender
   {
     Hierarchy.ProcessChanges();
 
-    while (_sceneActions.TryDequeue(out var action))
-    {
-      action();
-    }
-
     foreach (var gameObject in Hierarchy.Objects)
     {
       gameObject.ProcessChanges();
     }
+
+    while (_sceneActions.TryDequeue(out var action))
+    {
+      action();
+    }
   }
 }

Engine/src/Scene/SceneManager.cs

@@ -22,6 +22,7 @@ public class SceneManager : IUpdate, IRender
       _currentScene.Enter();
     }
 
+    if (parDeltaTime != 0)
       _currentScene?.Update(parDeltaTime);
   }
 

Engine/src/Window.cs

@@ -66,10 +66,15 @@ public class Window : IPresenter
     GL.BlitNamedFramebuffer(_engine.Renderer.RenderFramebuffer.Handle, 0,
       0, parTexture.Height, parTexture.Width, 0,
       0, 0, Width, Height,
-      ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit,
+      ClearBufferMask.ColorBufferBit,
       BlitFramebufferFilter.Nearest
     );
   }
+
+  public void Exit()
+  {
+    _window.Close();
+  }
 }
 
 public static class NativeWindowExtensions

EngineTests/src/Scene/HierarchyTests.cs

@@ -237,7 +237,6 @@ public class HierarchyTests
     _hierarchy.AddChild(parent1, child);
     _hierarchy.ProcessChanges();
 
-    // Reparent the child to parent2
     _hierarchy.AddChild(parent2, child);
     _hierarchy.ProcessChanges();
 
@@ -333,13 +332,11 @@ public class HierarchyTests
     _hierarchy.Add(child1);
     _hierarchy.Add(child2);
 
-    // Initial hierarchy setup
     _hierarchy.AddChild(grandParent, parent);
     _hierarchy.AddChild(parent, child1);
     _hierarchy.AddChild(parent, child2);
     _hierarchy.ProcessChanges();
 
-    // Reparent child1 to child2
     _hierarchy.AddChild(child2, child1);
     _hierarchy.ProcessChanges();
 
@@ -357,14 +354,12 @@ public class HierarchyTests
     const int hierarchyDepth = 100;
     var objects = new object[hierarchyDepth];
 
-    // Create objects
     for (var i = 0; i < hierarchyDepth; i++)
     {
       objects[i] = new object();
       _hierarchy.Add(objects[i]);
     }
 
-    // Create a deep hierarchy
     for (var i = 1; i < hierarchyDepth; i++)
     {
       _hierarchy.AddChild(objects[i - 1], objects[i]);
@@ -374,14 +369,12 @@ public class HierarchyTests
 
     Assert.Multiple(() =>
     {
-      // Verify parent-child relationships
       for (var i = 1; i < hierarchyDepth; i++)
       {
         Assert.That(_hierarchy.GetParent(objects[i]), Is.EqualTo(objects[i - 1]));
         Assert.That(_hierarchy.IsInHierarchy(objects[0], objects[i]), Is.True);
       }
 
-      // Verify children
       for (var i = 0; i < hierarchyDepth - 1; i++)
       {
         var children = _hierarchy.GetChildren(objects[i]).ToList();
@@ -409,7 +402,6 @@ public class HierarchyTests
     _hierarchy.AddChild(parent, child2);
     _hierarchy.ProcessChanges();
 
-    // Remove parent, which will also remove its children
     _hierarchy.Remove(parent);
     _hierarchy.ProcessChanges();
 
@@ -431,10 +423,9 @@ public class HierarchyTests
       .ToList();
 
     _hierarchy.Add(parent);
-    children.ForEach(child => _hierarchy.Add(child));
+    children.ForEach(parChild => _hierarchy.Add(parChild));
 
-    // Simulate concurrent child additions
-    children.AsParallel().ForAll(child => { _hierarchy.AddChild(parent, child); });
+    children.AsParallel().ForAll(parChild => { _hierarchy.AddChild(parent, parChild); });
 
     _hierarchy.ProcessChanges();
 
@@ -446,13 +437,8 @@ public class HierarchyTests
   {
     Assert.Multiple(() =>
     {
-      // Null child
       Assert.That(_hierarchy.IsInHierarchy(new object(), null), Is.False);
-
-      // Null ancestor
       Assert.That(_hierarchy.IsInHierarchy(null, new object()), Is.False);
-
-      // Both null
       Assert.That(_hierarchy.IsInHierarchy(null, null), Is.False);
     });
   }
@@ -505,12 +491,10 @@ public class HierarchyTests
 
     Assert.Multiple(() =>
     {
-      // Verify deep hierarchy relationships
       Assert.That(_hierarchy.IsInHierarchy(grandParent, grandChild), Is.True);
       Assert.That(_hierarchy.IsInHierarchy(parent, grandChild), Is.True);
       Assert.That(_hierarchy.IsInHierarchy(child, grandChild), Is.True);
 
-      // Verify inverse relationships are false
       Assert.That(_hierarchy.IsInHierarchy(grandChild, grandParent), Is.False);
       Assert.That(_hierarchy.IsInHierarchy(grandChild, parent), Is.False);
       Assert.That(_hierarchy.IsInHierarchy(grandChild, child), Is.False);
@@ -540,12 +524,10 @@ public class HierarchyTests
 
     Assert.Multiple(() =>
     {
-      // Verify within same branch
       Assert.That(_hierarchy.IsInHierarchy(root, branch1Parent), Is.True);
       Assert.That(_hierarchy.IsInHierarchy(root, branch1Child), Is.True);
       Assert.That(_hierarchy.IsInHierarchy(branch1Parent, branch1Child), Is.True);
 
-      // Verify between different branches
       Assert.That(_hierarchy.IsInHierarchy(branch1Parent, branch2Child), Is.False);
       Assert.That(_hierarchy.IsInHierarchy(branch2Parent, branch1Child), Is.False);
     });

PresenterConsole/assets/shader/ascii.shader

@@ -96,6 +96,21 @@ int findMostPerceptuallyAccurateColor(vec3 color) {
     return bestMatchIndex;
 }
 
+//int findMostPerceptuallyAccurateColor(vec3 color) {
+//    int closestIndex = 0;
+//    float minDistance = distance(color, ConsoleColorVec3[0]);
+//
+//    for (int i = 1; i < 16; i++) {
+//        float dist = distance(color, ConsoleColorVec3[i]);
+//        if (dist < minDistance) {
+//            minDistance = dist;
+//            closestIndex = i;
+//        }
+//    }
+//
+//    return closestIndex;
+//}
+
 // Enhanced luminosity calculation considering human perception
 float calculatePerceptualLuminance(vec3 color) {
     // BT.709 luminance coefficients with slight adjustment
@@ -118,7 +133,7 @@ layout (location = 0) in vec2 iUV;
 layout (location = 0) out vec4 FragColor;
 
 void main() {
-    vec3 pixelColor = texture(uInputTexture, iUV).rgb;
+    vec3 pixelColor = texture(uInputTexture, iUV * 4).rgb;
 
     // Find most perceptually accurate console color
     int colorIndex = findMostPerceptuallyAccurateColor(pixelColor);

PresenterConsole/src/ConsoleInputHandler.cs

@@ -1,9 +1,12 @@
 using Engine.Input;
+using OpenTK.Mathematics;
 
 namespace PresenterConsole;
 
 public class ConsoleInputHandler : IInputHandler
 {
+  public Vector2 MousePosition => Vector2.Zero;
+
   private readonly bool[] _currentKeys = new bool[256];
   private readonly bool[] _previousKeys = new bool[256];
 

PresenterConsole/src/ConsolePresenter.cs

@@ -1,22 +1,26 @@
-using Engine.Asset;
+using System.Text;
+using Engine.Asset;
 using Engine.Graphics;
 using Engine.Graphics.Buffer;
 using Engine.Graphics.Framebuffer;
-using Engine.Graphics.Shader;
 using Engine.Graphics.Texture;
+using Engine.Resource;
 using OpenTK.Graphics.OpenGL;
 using OpenTK.Mathematics;
 using OpenTK.Windowing.Common;
+using PresenterConsole.Resource;
 
 namespace PresenterConsole;
 
 public class ConsolePresenter : IPresenter
 {
-  public bool IsExiting => false;
+  public bool IsExiting { get; private set; }
   public int Width { get; private set; } = 2;
   public int Height { get; private set; } = 1;
   public event Action<ResizeEventArgs>? Resize;
 
+  private readonly Engine.Engine _engine;
+
   private readonly Framebuffer _framebuffer;
   private readonly Engine.Graphics.Shader.Program _asciiProgram;
   private Image<AsciiPixel>? _asciiImage;
@@ -28,9 +32,13 @@ public class ConsolePresenter : IPresenter
   private readonly ConsoleFastOutput _consoleOutput;
   private static readonly char[] LIGHTMAP = " .,:;=*#%@".Reverse().ToArray();
 
-  public ConsolePresenter()
+  public ConsolePresenter(Engine.Engine parEngine)
   {
-    _asciiProgram = ProgramLoader.LoadFromSource(Resource.ShaderResource.Ascii);
+    _engine = parEngine;
+    ((MemoryResourceStreamProvider)_engine.EngineResourceManager.StreamProvider).AddResource("shader/ascii",
+      Encoding.UTF8.GetBytes(ShaderResource.Ascii));
+
+    _asciiProgram = _engine.EngineResourceManager.Load<Engine.Graphics.Shader.Program>("shader/ascii");
 
     _framebuffer = Framebuffer.Builder(Width / 2, Height)
       .AddColorAttachment<AsciiPixel>()
@@ -55,6 +63,8 @@ public class ConsolePresenter : IPresenter
   {
     var openglTexture = (Texture)parTexture;
 
+    // GL.Viewport(0, 0, Width / 2, Height);
+
     _framebuffer.Bind();
 
     openglTexture.BindUnit();
@@ -67,6 +77,8 @@ public class ConsolePresenter : IPresenter
 
     _framebuffer.Unbind();
 
+    // GL.Viewport(0, 0, Width / 2 * 4, Height * 4);
+
     var asciiTexture = _framebuffer.TextureInternal;
     if (asciiTexture == null)
       throw new InvalidOperationException("Framebuffer texture is null");
@@ -75,10 +87,10 @@ public class ConsolePresenter : IPresenter
       _asciiImage = new Image<AsciiPixel>(asciiTexture.Width, asciiTexture.Height);
 
     asciiTexture.ReadPixels(_asciiImage);
-    Output(_asciiImage);
+    DrawImage(_asciiImage);
   }
 
-  private void Output(Image<AsciiPixel> parImage)
+  private void DrawImage(Image<AsciiPixel> parImage)
   {
     for (var y = 0; y < parImage.Height; y++)
     {
@@ -108,10 +120,15 @@ public class ConsolePresenter : IPresenter
       Width = consoleWidth;
       Height = consoleHeight;
 
-      Resize?.Invoke(new ResizeEventArgs(Width / 2, Height));
+      Resize?.Invoke(new ResizeEventArgs(Width / 2 * 4, Height * 4));
 
       _framebuffer.Resize(Width / 2, Height);
       _consoleOutput.Resize(Width, Height);
     }
   }
+
+  public void Exit()
+  {
+    IsExiting = true;
+  }
 }

PresenterConsole/src/Program.cs

@@ -10,8 +10,9 @@ internal static class Program
       .Headless()
       .LogToFile(true, "log.txt")
       .LogLevel(LogEventLevel.Debug)
-      .Presenter(_ => new ConsolePresenter())
+      .Presenter(parEngine => new ConsolePresenter(parEngine))
       .InputHandler(_ => new ConsoleInputHandler())
+      .AssetFolder(Path.GetFullPath("../DoomDeathmatch/asset"))
       .Build();
 
     DoomDeathmatch.DoomDeathmatch.Initialize(engine);

PresenterNative/src/Program.cs

@@ -18,6 +18,7 @@ internal static class Program
       .LogLevel(LogEventLevel.Debug)
       .Presenter(parEngine => parEngine.Window)
       .InputHandler(parEngine => new WindowInputHandler(parEngine.Window))
+      .AssetFolder(Path.GetFullPath("../DoomDeathmatch/asset"))
       .Build();
 
     DoomDeathmatch.DoomDeathmatch.Initialize(engine);

PresenterWpf/src/App.xaml.cs

@@ -1,10 +1,12 @@
 using System.Configuration;
 using System.Data;
+using System.IO;
 using System.Windows;
 using Engine;
 using Engine.Graphics;
 using Engine.Graphics.Texture;
 using Engine.Input;
+using OpenTK.Mathematics;
 using OpenTK.Windowing.Common;
 using Serilog.Events;
 
@@ -27,6 +29,7 @@ public partial class App : Application
       .LogToConsole()
       .LogToFile(true, "log.txt")
       .LogLevel(LogEventLevel.Debug)
+      .AssetFolder(Path.GetFullPath("../DoomDeathmatch/asset"))
       .Build();
 
     // Since engine claims current thread for rendering, we need to create a new thread to run WPF
@@ -53,6 +56,8 @@ public partial class App : Application
 
   private class InputHandlerWrapper : IInputHandler
   {
+    public Vector2 MousePosition => _inputHandler?.MousePosition ?? Vector2.Zero;
+
     private IInputHandler? _inputHandler;
 
     public IInputHandler? InputHandler
@@ -137,5 +142,10 @@ public partial class App : Application
     {
       Resize?.Invoke(e);
     }
+
+    public void Exit()
+    {
+      Presenter?.Exit();
+    }
   }
 }

PresenterWpf/src/MainWindow.xaml.cs

@@ -74,6 +74,11 @@ public partial class MainWindow : Window, IPresenter
     });
   }
 
+  public void Exit()
+  {
+    Dispatcher.Invoke(Close);
+  }
+
   private void DrawImage(Image<Rgb8> parImage)
   {
     try

PresenterWpf/src/WPFInputHandler.cs

@@ -1,18 +1,27 @@
 using System.Windows;
 using System.Windows.Input;
 using Engine.Input;
+using OpenTK.Mathematics;
 
 namespace PresenterWpf;
 
 public class WpfInputHandler : IInputHandler
 {
+  public Vector2 MousePosition => _mousePosition;
+
   private readonly Window _window;
 
+  private readonly bool[] _actualKeys = new bool[(int)KeyboardButtonCode.TotalCount];
   private readonly bool[] _currentKeys = new bool[(int)KeyboardButtonCode.TotalCount];
   private readonly bool[] _previousKeys = new bool[(int)KeyboardButtonCode.TotalCount];
+
+  private readonly bool[] _actualMouseButtons = new bool[(int)MouseButtonCode.TotalCount];
   private readonly bool[] _currentMouseButtons = new bool[(int)MouseButtonCode.TotalCount];
   private readonly bool[] _previousMouseButtons = new bool[(int)MouseButtonCode.TotalCount];
 
+
+  private Vector2 _mousePosition = Vector2.Zero;
+
   public WpfInputHandler(Window parWindow)
   {
     _window = parWindow;
@@ -21,6 +30,7 @@ public class WpfInputHandler : IInputHandler
     _window.PreviewKeyUp += Window_PreviewKeyUp;
     _window.PreviewMouseDown += Window_PreviewMouseDown;
     _window.PreviewMouseUp += Window_PreviewMouseUp;
+    _window.MouseMove += Window_MouseMove;
   }
 
   public void Update(double parDeltaTime)
@@ -28,50 +38,58 @@ public class WpfInputHandler : IInputHandler
     for (var i = 0; i < _currentKeys.Length; i++)
     {
       _previousKeys[i] = _currentKeys[i];
+      _currentKeys[i] = _actualKeys[i];
     }
 
     for (var i = 0; i < _currentMouseButtons.Length; i++)
     {
       _previousMouseButtons[i] = _currentMouseButtons[i];
+      _currentMouseButtons[i] = _actualMouseButtons[i];
     }
   }
 
   private void Window_PreviewKeyDown(object parSender, KeyEventArgs parEventArgs)
   {
     var keyCode = ConvertToKeyboardButtonCode(parEventArgs.Key);
-    if (keyCode >= 0 && keyCode < _currentKeys.Length)
+    if (keyCode >= 0 && keyCode < _actualKeys.Length)
     {
-      _currentKeys[keyCode] = true;
+      _actualKeys[keyCode] = true;
     }
   }
 
   private void Window_PreviewKeyUp(object parSender, KeyEventArgs parEventArgs)
   {
     var keyCode = ConvertToKeyboardButtonCode(parEventArgs.Key);
-    if (keyCode >= 0 && keyCode < _currentKeys.Length)
+    if (keyCode >= 0 && keyCode < _actualKeys.Length)
     {
-      _currentKeys[keyCode] = false;
+      _actualKeys[keyCode] = false;
     }
   }
 
   private void Window_PreviewMouseDown(object parSender, MouseButtonEventArgs parEventArgs)
   {
     var buttonCode = ConvertToMouseButtonCode(parEventArgs.ChangedButton);
-    if (buttonCode >= 0 && buttonCode < _currentMouseButtons.Length)
+    if (buttonCode >= 0 && buttonCode < _actualMouseButtons.Length)
     {
-      _currentMouseButtons[buttonCode] = true;
+      _actualMouseButtons[buttonCode] = true;
     }
   }
 
   private void Window_PreviewMouseUp(object parSender, MouseButtonEventArgs parEventArgs)
   {
     var buttonCode = ConvertToMouseButtonCode(parEventArgs.ChangedButton);
-    if (buttonCode >= 0 && buttonCode < _currentMouseButtons.Length)
+    if (buttonCode >= 0 && buttonCode < _actualMouseButtons.Length)
     {
-      _currentMouseButtons[buttonCode] = false;
+      _actualMouseButtons[buttonCode] = false;
     }
   }
 
+  private void Window_MouseMove(object parSender, MouseEventArgs parEventArgs)
+  {
+    var position = parEventArgs.GetPosition(null);
+    _mousePosition = new Vector2((float)position.X, (float)position.Y);
+  }
+
   public bool IsKeyPressed(KeyboardButtonCode parKeyboardButtonCode)
   {
     var keyCode = (int)parKeyboardButtonCode;