Add initial project files and implement CameraController and World classes

2025-10-18 17:26:39 +01:00
parent 008ed63eff
commit ca3f88cf17
30 changed files with 964 additions and 0 deletions
--- a/Source/CameraController.cs
+++ b/Source/CameraController.cs
@@ -0,0 +1,117 @@
+using Godot;
+
+public partial class CameraController : Camera2D
+{
+	[Export] public float ZoomSpeed = 1.1f;
+	[Export] public float MinZoom = 0.01f;
+	[Export] public float MaxZoom = 5.0f;
+	[Export] public bool EnableRotation = false;
+	[Export] public float RotationSpeed = 0.01f;
+	[Export] public float PanSmoothing = 0.1f;
+	
+	private bool _isDragging = false;
+	private Vector2 _dragStartMousePos;
+	private Vector2 _dragStartCameraPos;
+	private bool _isRotating = false;
+	private Vector2 _lastMousePosition;
+
+	public override void _Ready()
+	{
+		Enabled = true;
+	}
+
+	public override void _UnhandledInput(InputEvent @event)
+	{
+		HandleZoom(@event);
+		HandlePanning(@event);
+		HandleRotation(@event);
+	}
+
+	private void HandleZoom(InputEvent @event)
+	{
+		if (@event is InputEventMouseButton mouseButton && mouseButton.Pressed)
+		{
+			Vector2 mouseWorldPos = GetGlobalMousePosition();
+			
+			if (mouseButton.ButtonIndex == MouseButton.WheelUp)
+			{
+				var newZoom = Zoom * ZoomSpeed;
+				if (newZoom.X <= MaxZoom)
+				{
+					ZoomToPoint(newZoom, mouseWorldPos);
+				}
+			}
+			else if (mouseButton.ButtonIndex == MouseButton.WheelDown)
+			{
+				var newZoom = Zoom / ZoomSpeed;
+				if (newZoom.X >= MinZoom)
+				{
+					ZoomToPoint(newZoom, mouseWorldPos);
+				}
+			}
+		}
+	}
+
+	private void ZoomToPoint(Vector2 newZoom, Vector2 worldPoint)
+	{
+		Vector2 viewportCenter = GetViewportRect().Size / 2;
+		Vector2 offsetFromCenter = (GetGlobalMousePosition() - GlobalPosition);
+		
+		Zoom = newZoom;
+		
+		Vector2 newOffsetFromCenter = offsetFromCenter / (newZoom.X / Zoom.X);
+		GlobalPosition += offsetFromCenter - newOffsetFromCenter;
+	}
+
+	private void HandlePanning(InputEvent @event)
+	{
+		if (@event is InputEventMouseButton mouseButton)
+		{
+			if (mouseButton.ButtonIndex == MouseButton.Left)
+			{
+				if (mouseButton.Pressed)
+				{
+					_isDragging = true;
+					_dragStartMousePos = mouseButton.GlobalPosition;
+					_dragStartCameraPos = GlobalPosition;
+				}
+				else
+				{
+					_isDragging = false;
+				}
+			}
+		}
+		else if (@event is InputEventMouseMotion mouseMotion && _isDragging)
+		{
+			Vector2 mouseDelta = _dragStartMousePos - mouseMotion.GlobalPosition;
+			GlobalPosition = _dragStartCameraPos + mouseDelta / Zoom;
+		}
+	}
+
+	private void HandleRotation(InputEvent @event)
+	{
+		if (!EnableRotation) return;
+
+		if (@event is InputEventMouseButton mouseButton)
+		{
+			if (mouseButton.ButtonIndex == MouseButton.Right)
+			{
+				if (mouseButton.Pressed)
+				{
+					_isRotating = true;
+					_lastMousePosition = mouseButton.GlobalPosition;
+				}
+				else
+				{
+					_isRotating = false;
+				}
+			}
+		}
+		else if (@event is InputEventMouseMotion mouseMotion && _isRotating)
+		{
+			var delta = _lastMousePosition - mouseMotion.GlobalPosition;
+			Rotation += delta.X * RotationSpeed;
+			_lastMousePosition = mouseMotion.GlobalPosition;
+		}
+	}
+}