NPC that shoots at player

Scripts/Enemy.cs

@@ -0,0 +1,103 @@
+using Godot;
+using System;
+using System.Diagnostics;
+
+public partial class Enemy : Area2D
+{
+	private InteractionController _cachedPlayer;
+	private EnemyState _currentState = EnemyState.Idle;
+
+	[Export]
+	public PackedScene BulletScene { get; set; }
+
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+		switch (_currentState)
+		{
+			case EnemyState.Idle:
+
+				break;
+
+			case EnemyState.Primed:
+				// Have the raycast follow the player and shoot if visible
+				//HandlePlayerDetection();
+				break;
+
+			//case EnemyState.Shooting:
+			// Shoot
+			//break;
+			default:
+				break;
+		}
+	}
+
+	public override void _PhysicsProcess(double delta)
+	{
+		HandlePlayerDetection();
+	}
+
+	private void HandlePlayerDetection()
+	{
+		if (_cachedPlayer == null || _currentState is not EnemyState.Primed)
+		{
+			return;
+		}
+
+		if (IsPlayerInSight()) {
+			// SHOOT
+			var bullet = BulletScene.Instantiate<Bullet>();
+			Owner.AddChild(bullet);
+			bullet.Transform = this.GlobalTransform;
+			bullet.Position = this.Position;
+			bullet.SetDirection((_cachedPlayer.GlobalPosition - this.GlobalPosition).Normalized());
+		}
+	}
+
+	private bool IsPlayerInSight() {
+ 		var spaceState = GetWorld2D().DirectSpaceState;
+		var query = PhysicsRayQueryParameters2D.Create(this.GlobalPosition, _cachedPlayer.GlobalPosition, CollisionMask, new Godot.Collections.Array<Rid> { GetRid() });
+		var result = spaceState.IntersectRay(query);
+
+		// If count is 0 then the player is in sight, otherwise there is level geometry in the way
+		return result.Count == 0;
+
+		// if (result.Count > 0)
+		//     GD.Print("Hit at point: ", result["position"]);
+	}
+
+	private void _on_player_detection_area_entered(Area2D area)
+	{
+		// Assume area is player for now
+		if (area is InteractionController player)
+		{
+			Debug.WriteLine("Enemy detection area Entered by interaction controller");
+
+			_cachedPlayer = player;
+			if (_currentState is EnemyState.Idle)
+			{
+				_currentState = EnemyState.Primed;
+			}
+		}
+	}
+
+	private void _on_player_detection_area_exited(Area2D area)
+	{
+		if (_currentState is EnemyState.Primed)
+		{
+			_currentState = EnemyState.Idle;
+		}
+	}
+
+	private enum EnemyState
+	{
+		Idle,
+		Primed
+	}
+}