Global state singleton

Scripts/GlobalState.cs

@@ -0,0 +1,57 @@
+using Godot;
+
+public partial class GlobalState : Node
+{
+    public static GlobalState Instance { get; private set; }
+
+    public Node CurrentScene { get; set; }
+
+    public override void _Ready()
+    {
+        Instance = this;
+
+        Viewport root = GetTree().Root;
+        // Using a negative index counts from the end, so this gets the last child node of `root`.
+        CurrentScene = root.GetChild(-1);
+
+
+    }
+
+    public void GotoScene(string path)
+    {
+        // This function will usually be called from a signal callback,
+        // or some other function from the current scene.
+        // Deleting the current scene at this point is
+        // a bad idea, because it may still be executing code.
+        // This will result in a crash or unexpected behavior.
+
+        // The solution is to defer the load to a later time, when
+        // we can be sure that no code from the current scene is running:
+
+        CallDeferred(MethodName.DeferredGotoScene, path);
+    }
+
+    public void DeferredGotoScene(string path)
+    {
+        // It is now safe to remove the current scene.
+        CurrentScene.Free();
+
+        // Load a new scene.
+        var nextScene = GD.Load<PackedScene>(path);
+
+        // Instance the new scene.
+        CurrentScene = nextScene.Instantiate();
+
+        // Add it to the active scene, as child of root.
+        GetTree().Root.AddChild(CurrentScene);
+
+        // Optionally, to make it compatible with the SceneTree.change_scene_to_file() API.
+        GetTree().CurrentScene = CurrentScene;
+    }
+}
+
+public class MapStartData 
+{
+    public int EggIndex = 0;
+    
+}