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BITKit/Scripts/Selector/CameraSelector.cs

@@ -0,0 +1,122 @@
+using Godot;
+using System;
+using BITKit.Selection;
+
+namespace BITKit
+{
+	public partial class CameraSelector : EntityBehaviour,ISelector
+	{
+		[Export] private Node3D node3D;
+		[Export] private Control control;
+		[Export] private float distance;
+		
+		private ISelectable _currentSelectable;
+
+		private readonly ValidHandle _isEnabled = new();
+		public override void _EnterTree()
+		{
+			base._EnterTree();
+			DI.Register<ISelector>(this);
+		}
+
+		public override void _Ready()
+		{
+			base._Ready();
+			if (control is not null)
+			{
+				control.MouseEntered += () => _isEnabled.RemoveDisableElements(control);
+				control.MouseExited += () => _isEnabled.AddDisableElements(control);
+			}
+			_isEnabled.AddElement(this);
+		}
+
+		public override void _Input(InputEvent @event)
+		{
+			base._Input(@event);
+			switch (@event)
+			{
+				case InputEventMouseButton { Pressed: true}:
+					if (_currentSelectable is not null)
+					{
+						_currentSelectable.SetSelectionState(SelectionState.Selected);
+						OnSelected?.Invoke(_currentSelectable);
+					}
+					break;
+			}
+		}
+
+		public override void _Process(double delta)
+		{
+			base._Process(delta);
+			if (!_isEnabled)
+			{
+				if (_currentSelectable is not null)
+				{
+					_currentSelectable.SetSelectionState(SelectionState.None);
+					OnNone?.Invoke(_currentSelectable);
+					_currentSelectable = null;
+				}
+			}
+			
+			var mousePosition = GetViewport().GetMousePosition();
+			var origin = CameraService.Singleton.ProjectRayOrigin(mousePosition);
+			var normal = CameraService.Singleton.ProjectRayNormal(mousePosition);
+			var end = origin + normal * distance;
+			var query = PhysicsRayQueryParameters3D.Create(origin, end);
+			query.CollideWithAreas = true;
+
+			var spaceState =node3D.GetWorld3D().DirectSpaceState;
+			var result = spaceState.IntersectRay(query);
+
+			ISelectable currentSelected=null;
+			if (result.TryGetValue("collider", out var collider))
+			{
+				var node = (Node3D)collider;
+				//var pos = (Vector3)result["position"];
+
+				MathNode.TryGetNodeInParent<ISelectable>(node, out currentSelected);
+			}
+			
+			//BIT4Log.Log($"currentSelected:{currentSelected}");
+
+			switch (currentSelected,_currentSelectable)
+			{
+				case (not null,not null) when currentSelected != _currentSelectable:
+					OnNone?.Invoke(_currentSelectable);
+					_currentSelectable.SetSelectionState(SelectionState.None);
+					_currentSelectable = currentSelected;
+					_currentSelectable.SetSelectionState(SelectionState.Hover);
+					OnHover?.Invoke(_currentSelectable);
+					break;
+				case (null,null): break;
+				case (null,not null): 
+					_currentSelectable.SetSelectionState(SelectionState.None);
+					OnNone?.Invoke(_currentSelectable);
+					_currentSelectable = null;
+					break;
+				case (not null,null):
+					_currentSelectable = currentSelected;
+					_currentSelectable.SetSelectionState(SelectionState.Hover);
+					OnHover?.Invoke(_currentSelectable);
+					break;
+			}
+		}
+
+		public bool TryGetCurrentSelectable(out ISelectable selectable)
+		{
+			selectable = _currentSelectable;
+			return selectable is not null;
+		}
+
+		public event Action<ISelectable> OnNone;
+		public event Action<ISelectable> OnHover;
+		public event Action<ISelectable> OnActive;
+		public event Action<ISelectable> OnInactive;
+		public event Action<ISelectable> OnFocus;
+		public event Action<ISelectable> OnSelected;
+		public event Action<ISelectable> OnEnabled;
+		public event Action<ISelectable> OnChecked;
+		public event Action<ISelectable> OnRoot;
+	}
+
+}

BITKit/Scripts/Selector/Selectable.cs

@@ -0,0 +1,22 @@
+using Godot;
+using System;
+using BITKit;
+
+namespace BITKit.Selection
+{
+	public partial class Selectable : EntityBehaviour,ISelectable
+	{
+		public void SetSelectionState(SelectionState state)
+		{
+		}
+		public event Action OnNone;
+		public event Action OnHover;
+		public event Action OnActive;
+		public event Action OnInactive;
+		public event Action OnFocus;
+		public event Action OnSelected;
+		public event Action OnEnabled;
+		public event Action OnChecked;
+		public event Action OnRoot;
+	}
+}