Pacxon (#12)

* Add GridMovementAbility and PacXonGridInteractor for grid-based movement; integrate with PlayerController and PacXonLevel

* Add GhostMovementComponent and PacXonTrailComponent; integrate ghost movement and trail features in PacXonLevel

* Update main menu button focus and add new movement abilities; adjust player and ghost initialization in PacXonLevel

scripts/PacXonLevel.cs

@@ -0,0 +1,59 @@
+using System.Linq;
+using Godot;
+using Mr.BrickAdventures.scripts.components;
+
+namespace Mr.BrickAdventures.scripts;
+
+[GlobalClass]
+public partial class PacXonLevel : Node
+{
+    [Export] public PlayerController Player { get; set; }
+    [Export] public PacXonGridManager GridManager { get; set; }
+    [Export] public Node GhostContainer { get; set; }
+    [Export] public Label PercentageLabel { get; set; }
+    
+    private const float WinPercentage = 0.90f;
+
+    public override void _Ready()
+    {
+        var ghosts = GhostContainer.GetChildren().OfType<Node2D>().ToList();
+        Player.ClearMovementAbilities();
+        Player.SetGridMovement();
+        
+        foreach (var ghost in ghosts)
+        {
+            var movement = ghost.GetNode<GhostMovementComponent>("GhostMovementComponent");
+            movement?.Initialize(GridManager, Player);
+        }
+        
+        var gridMovement = Player.GetNodeOrNull<GridMovementAbility>("Movements/GridMovementAbility");
+        var gridInteractor = Player.GetNodeOrNull<PacXonGridInteractor>("PacXonGridInteractor");
+        var trailComponent = Player.GetNodeOrNull<PacXonTrailComponent>("PacXonTrailComponent");
+
+        if (gridMovement != null && gridInteractor != null)
+        {
+            gridInteractor.Initialize(GridManager, gridMovement, ghosts);
+            trailComponent?.Initialize(gridInteractor);
+        }
+        else
+        {
+            GD.PushError("Could not find GridMovementAbility or PacXonGridInteractor on Player.");
+        }
+        
+        GridManager.FillPercentageChanged += OnFillPercentageChanged;
+        OnFillPercentageChanged(GridManager.GetFillPercentage());
+        
+        var playerMapPos = GridManager.LocalToMap(Player.Position);
+        Player.GlobalPosition = GridManager.MapToLocal(playerMapPos);
+    }
+    
+    private void OnFillPercentageChanged(float percentage)
+    {
+        PercentageLabel.Text = $"Fill: {percentage:P0}";
+        if (percentage >= WinPercentage)
+        {
+            GD.Print("YOU WIN!");
+            GetTree().Paused = true;
+        }
+    }
+}

scripts/PacXonLevel.cs.uid

@@ -0,0 +1 @@
+uid://b8lu5pdufiy37

scripts/components/GhostMovementComponent.cs

@@ -0,0 +1,69 @@
+using Godot;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+[GlobalClass]
+public partial class GhostMovementComponent : Node2D
+{
+    [Export] public float MoveSpeed { get; set; } = 0.2f;
+    [Export] public int GridSize { get; set; } = 16;
+    
+    private CharacterBody2D _body;
+    private Timer _moveTimer;
+    private PacXonGridManager _gridManager;
+    private HealthComponent _playerHealth;
+    private Vector2 _direction;
+    private readonly Vector2[] _directions = { Vector2.Up, Vector2.Down, Vector2.Left, Vector2.Right };
+    
+    public override void _Ready()
+    {
+        _body = Owner.GetNode<CharacterBody2D>(".");
+        _moveTimer = new Timer { WaitTime = MoveSpeed, OneShot = false, Autostart = true };
+        AddChild(_moveTimer);
+        _moveTimer.Timeout += OnMoveTimerTimeout;
+
+        var rng = new RandomNumberGenerator();
+        _direction = _directions[rng.RandiRange(0, 3)];
+    }
+    
+    public void Initialize(PacXonGridManager gridManager, PlayerController player)
+    {
+        _gridManager = gridManager;
+        _playerHealth = player.GetNode<HealthComponent>("HealthComponent");
+    }
+    
+    private void OnMoveTimerTimeout()
+    {
+        if (_gridManager == null || _body == null) return;
+
+        var nextMapPos = _gridManager.LocalToMap(_body.Position + (_direction * GridSize));
+        var cellState = _gridManager.GetCellState(nextMapPos);
+
+        switch (cellState)
+        {
+            case CellState.Solid:
+                PickNewDirection();
+                break;
+
+            case CellState.Trail:
+                _playerHealth?.DecreaseHealth(9999);
+                _moveTimer.Stop(); 
+                break;
+
+            case CellState.Empty:
+                _body.Position += _direction * GridSize;
+                break;
+        }
+    }
+
+    private void PickNewDirection()
+    {
+        var rng = new RandomNumberGenerator();
+        Vector2 newDir;
+        do
+        {
+            newDir = _directions[rng.RandiRange(0, 3)];
+        } while (newDir == _direction || newDir == -_direction);
+        _direction = newDir;
+    }
+}

scripts/components/GhostMovementComponent.cs.uid

@@ -0,0 +1 @@
+uid://7i20oc4cyabl

scripts/components/Movement/GridMovementAbility.cs

@@ -0,0 +1,59 @@
+using Godot;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+[GlobalClass]
+public partial class GridMovementAbility : MovementAbility
+{
+    [Export] public float MoveSpeed { get; set; } = 0.15f; // Time in seconds between moves
+    [Export] public int GridSize { get; set; } = 16; // Size of one grid cell in pixels
+
+    private Vector2 _currentDirection = Vector2.Zero;
+    private Vector2 _nextDirection = Vector2.Zero;
+    private Timer _moveTimer;
+    
+    [Signal]
+    public delegate void MovedEventHandler(Vector2 newPosition);
+    
+    public override void Initialize(PlayerController controller)
+    {
+        base.Initialize(controller);
+        _moveTimer = new Timer { WaitTime = MoveSpeed, OneShot = false };
+        AddChild(_moveTimer);
+        _moveTimer.Timeout += OnMoveTimerTimeout;
+        _moveTimer.Start();
+    }
+    
+    public override Vector2 ProcessMovement(Vector2 currentVelocity, double delta)
+    {
+        GD.Print($"Player position: {_body.Position}, {_body.GlobalPosition}");
+        
+        var inputDirection = _input.MoveDirection;
+        var newDirection = Vector2.Zero;
+        
+        if (Mathf.Abs(inputDirection.Y) > 0.1f)
+        {
+            newDirection = new Vector2(0, Mathf.Sign(inputDirection.Y));
+        }
+        else if (Mathf.Abs(inputDirection.X) > 0.1f)
+        {
+            newDirection = new Vector2(Mathf.Sign(inputDirection.X), 0);
+        }
+    
+        if (newDirection != Vector2.Zero && newDirection != -_currentDirection)
+        {
+            _nextDirection = newDirection;
+        }
+        
+        return Vector2.Zero; 
+    }
+    
+    private void OnMoveTimerTimeout()
+    {
+        _currentDirection = _nextDirection;
+        if (_currentDirection == Vector2.Zero) return;
+
+        _body.Position += _currentDirection * GridSize;
+        EmitSignal(SignalName.Moved, _body.GlobalPosition);
+    }
+}

scripts/components/Movement/GridMovementAbility.cs.uid

@@ -0,0 +1 @@
+uid://ctm5glmeu502l

scripts/components/PacXonGridInteractor.cs

@@ -0,0 +1,91 @@
+using System.Collections.Generic;
+using Godot;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+[GlobalClass]
+public partial class PacXonGridInteractor : Node
+{
+    private enum PlayerGridState { OnSolid, DrawingTrail }
+    
+    private PacXonGridManager _gridManager;
+    private HealthComponent _healthComponent;
+    private GridMovementAbility _gridMovement;
+    
+    private PlayerGridState _currentState = PlayerGridState.OnSolid;
+    private readonly List<Vector2I> _currentTrail = [];
+    private List<Node2D> _ghosts = [];
+    
+    [Signal] public delegate void TrailStartedEventHandler(Vector2 startPosition);
+    [Signal] public delegate void TrailExtendedEventHandler(Vector2 newPosition);
+    [Signal] public delegate void TrailClearedEventHandler();
+
+    public override void _Ready()
+    {
+        _healthComponent = Owner.GetNodeOrNull<HealthComponent>("HealthComponent");
+    }
+
+    public void Initialize(PacXonGridManager gridManager, GridMovementAbility gridMovement, List<Node2D> ghosts)
+    {
+        _gridManager = gridManager;
+        _gridMovement = gridMovement;
+        _ghosts = ghosts;
+        _gridMovement.Moved += OnPlayerMoved;
+    }
+    
+    private void OnPlayerMoved(Vector2 newPosition)
+    {
+        if (_gridManager == null) return;
+        
+        var mapCoords = _gridManager.LocalToMap(newPosition);
+        var destinationState = _gridManager.GetCellState(mapCoords);
+        
+        if (_currentState == PlayerGridState.DrawingTrail) EmitSignalTrailExtended(newPosition);
+
+        if (destinationState == CellState.Trail)
+        {
+            EmitSignalTrailCleared();
+            _healthComponent?.DecreaseHealth(9999);
+            return;
+        }
+
+        if (_currentState == PlayerGridState.OnSolid)
+        {
+            if (destinationState == CellState.Empty)
+            {
+                // Moved from solid ground to an empty space, start drawing.
+                _currentState = PlayerGridState.DrawingTrail;
+                _currentTrail.Clear();
+                _currentTrail.Add(mapCoords);
+                _gridManager.SetCellState(mapCoords, CellState.Trail);
+                EmitSignalTrailStarted(newPosition);
+            }
+        }
+        else if (_currentState == PlayerGridState.DrawingTrail)
+        {
+            if (destinationState == CellState.Empty)
+            {
+                // Continue drawing the trail
+                _currentTrail.Add(mapCoords);
+                _gridManager.SetCellState(mapCoords, CellState.Trail);
+            }
+            else if (destinationState == CellState.Solid)
+            {
+                _gridManager.PerformFloodFill(_ghosts);
+                GD.Print("Fill logic triggered!");
+                _currentState = PlayerGridState.OnSolid;
+                SolidifyTrail();
+                _currentTrail.Clear();
+                EmitSignalTrailCleared();
+            }
+        }
+    }
+
+    private void SolidifyTrail()
+    {
+        foreach (var pos in _currentTrail)
+        {
+            _gridManager.SetCellState(pos, CellState.Solid);
+        }
+    }
+}

scripts/components/PacXonGridInteractor.cs.uid

@@ -0,0 +1 @@
+uid://c00siqtssccr6

scripts/components/PacXonGridManager.cs

@@ -0,0 +1,121 @@
+using System.Collections.Generic;
+using System.Linq;
+using Godot;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+public enum CellState
+{
+    Empty = -1,
+    Solid = 0,
+    Trail = 1,
+    Hunted = 2
+}
+
+[GlobalClass]
+public partial class PacXonGridManager : TileMapLayer
+{
+    [Export] public Rect2I PlayArea { get; set; } = new Rect2I(1, 1, 38, 28);
+    
+    private int _solidCellCount = 0;
+    private int _totalPlayableCells = 0;
+    
+    [Signal] public delegate void FillPercentageChangedEventHandler(float percentage);
+
+    public override void _Ready()
+    {
+        _totalPlayableCells = PlayArea.Size.X * PlayArea.Size.Y;
+        InitializeGrid();
+    }
+    
+    private void InitializeGrid()
+    {
+        Clear();
+        
+        for (var x = PlayArea.Position.X - 1; x <= PlayArea.End.X + 1; x++)
+        {
+            for (var y = PlayArea.Position.Y - 1; y <= PlayArea.End.Y + 1; y++)
+            {
+                if (x < PlayArea.Position.X || x > PlayArea.End.X || y < PlayArea.Position.Y || y > PlayArea.End.Y)
+                {
+                    SetCell(new Vector2I(x, y), (int)CellState.Solid, Vector2I.Zero);
+                }
+            }
+        }
+    }
+
+    public CellState GetCellState(Vector2I mapCoords)
+    {
+        var tileId = GetCellSourceId(mapCoords);
+        return (CellState)tileId;
+    }
+
+    public void SetCellState(Vector2I mapCoords, CellState state)
+    {
+        if (GetCellSourceId(mapCoords) != (int)CellState.Solid && state == CellState.Solid) _solidCellCount++;
+        SetCell(mapCoords, (int)state, Vector2I.Zero);
+    }
+    
+    public float GetFillPercentage()
+    {
+        return _totalPlayableCells > 0 ? (float)_solidCellCount / _totalPlayableCells : 0;
+    }
+
+    public void PerformFloodFill(List<Node2D> ghosts)
+    {
+        var unsafeCells = new HashSet<Vector2I>();
+
+        foreach (var ghost in ghosts.Where(IsInstanceValid))
+        {
+            var ghostPos = LocalToMap(ghost.Position);
+            FloodFillScan(ghostPos, unsafeCells);
+        } 
+        
+        var filledCount = 0;
+        for (var x = PlayArea.Position.X; x <= PlayArea.End.X; x++)
+        {
+            for (var y = PlayArea.Position.Y; y <= PlayArea.End.Y; y++)
+            {
+                var currentPos = new Vector2I(x, y);
+                if (GetCellState(currentPos) == CellState.Empty && !unsafeCells.Contains(currentPos))
+                {
+                    SetCellState(currentPos, CellState.Solid);
+                    filledCount++;
+                }
+            }
+        }
+        
+        if (filledCount > 0)
+        {
+            EmitSignal(SignalName.FillPercentageChanged, GetFillPercentage());
+        }
+    }
+    
+    private void FloodFillScan(Vector2I startPos, HashSet<Vector2I> visited)
+    {
+        if (!PlayArea.HasPoint(startPos) || visited.Contains(startPos)) return;
+
+        var q = new Queue<Vector2I>();
+        q.Enqueue(startPos);
+        visited.Add(startPos);
+
+        while (q.Count > 0)
+        {
+            var pos = q.Dequeue();
+            
+            var neighbors = new[]
+            {
+                pos + Vector2I.Up, pos + Vector2I.Down, pos + Vector2I.Left, pos + Vector2I.Right
+            };
+
+            foreach (var neighbor in neighbors)
+            {
+                if (PlayArea.HasPoint(neighbor) && !visited.Contains(neighbor) && GetCellState(neighbor) == CellState.Empty)
+                {
+                    visited.Add(neighbor);
+                    q.Enqueue(neighbor);
+                }
+            }
+        }
+    }
+}

scripts/components/PacXonGridManager.cs.uid

@@ -0,0 +1 @@
+uid://dx4m2ouyvwkir

scripts/components/PacXonTrailComponent.cs

@@ -0,0 +1,67 @@
+using System.Collections.Generic;
+using Godot;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+[GlobalClass]
+public partial class PacXonTrailComponent : Line2D
+{
+    private PacXonGridInteractor _gridInteractor;
+    private readonly List<Vector2> _trailPoints = [];
+    
+    public void Initialize(PacXonGridInteractor interactor)
+    {
+        _gridInteractor = interactor;
+        _gridInteractor.TrailStarted += OnTrailStarted;
+        _gridInteractor.TrailExtended += OnTrailExtended;
+        _gridInteractor.TrailCleared += OnTrailCleared;
+
+        Width = 8;
+        DefaultColor = new Color("#a6f684");
+        JointMode = LineJointMode.Round;
+        BeginCapMode = LineCapMode.Round;
+        EndCapMode = LineCapMode.Round;
+    }
+    
+    public override void _ExitTree()
+    {
+        if (_gridInteractor != null)
+        {
+            _gridInteractor.TrailStarted -= OnTrailStarted;
+            _gridInteractor.TrailExtended -= OnTrailExtended;
+            _gridInteractor.TrailCleared -= OnTrailCleared;
+        }
+    }
+    
+    private void OnTrailStarted(Vector2 startPosition)
+    {
+        _trailPoints.Clear();
+        _trailPoints.Add(ToLocal(startPosition));
+        _trailPoints.Add(ToLocal(startPosition));
+        UpdateTrail();
+    }
+
+    private void OnTrailExtended(Vector2 newPosition)
+    {
+        if (_trailPoints.Count > 0)
+        {
+            _trailPoints[^1] = ToLocal(newPosition);
+        }
+        UpdateTrail();
+    }
+
+    private void OnTrailCleared()
+    {
+        _trailPoints.Clear();
+        UpdateTrail();
+    }
+
+    private void UpdateTrail()
+    {
+        ClearPoints();
+        foreach (var point in _trailPoints)
+        {
+            AddPoint(point);
+        }
+    }
+}

scripts/components/PacXonTrailComponent.cs.uid

@@ -0,0 +1 @@
+uid://cmk4m7mplqnrm

scripts/components/PlayerController.cs

@@ -18,6 +18,7 @@ public partial class PlayerController : CharacterBody2D
     [Export] public PackedScene OneWayPlatformScene { get; set; }
     [Export] public PackedScene SpaceshipMovementScene { get; set; }
     [Export] public PackedScene WallJumpScene { get; set; }
+    [Export] public PackedScene GridMovementScene { get; set; }
     
     [Signal] public delegate void JumpInitiatedEventHandler();
     [Signal] public delegate void MovementAbilitiesChangedEventHandler();
@@ -75,7 +76,7 @@ public partial class PlayerController : CharacterBody2D
         _abilities.Add(ability);
     }
     
-    private void ClearMovementAbilities()
+    public void ClearMovementAbilities()
     {
         foreach (var ability in _abilities)
         {
@@ -118,7 +119,14 @@ public partial class PlayerController : CharacterBody2D
         if (SpaceshipMovementScene != null) AddAbility(SpaceshipMovementScene.Instantiate<MovementAbility>());
         EmitSignalMovementAbilitiesChanged();
     }
-    
+
+    public void SetGridMovement()
+    {
+        ClearMovementAbilities();
+        if (GridMovementScene != null) AddAbility(GridMovementScene.Instantiate<MovementAbility>());
+        EmitSignalMovementAbilitiesChanged();
+    }
+
     private async Task ConnectJumpAndGravityAbilities()
     {
         await ToSignal(GetTree(), SceneTree.SignalName.ProcessFrame);