Isometric implementation

Scripts/Components/FSM/IsoStateMachineBase.cs

@@ -0,0 +1,55 @@
+using System.Collections.Generic;
+using Godot;
+
+namespace Cirno.Scripts.Components.FSM;
+
+public abstract partial class IsoStateMachineBase<TKey, TType> : Node, IStateMachine<TKey, TType>
+    where TKey : notnull
+    where TType : Node
+{
+    public Dictionary<TKey, IState<TKey, TType>> States { get; set; } = new();
+    public TKey CurrentStateIndex { get; set; }
+    public IState<TKey, TType> CurrentState => States[CurrentStateIndex];
+    public abstract TKey InitialState { get; protected set; }
+
+    private TType _mainObject;
+    public TType MainObject => _mainObject;
+    
+    public override void _Ready()
+    {
+        _mainObject = this.GetParent<TType>();
+        var children = GetChildren();
+
+        foreach (var child in children)
+        {
+            if (child is IState<TKey, TType> state)
+            {
+                States.Add(state.StateId, state);
+                state.Init(this);
+            }
+        }
+        SetState(InitialState);
+    }
+    
+    public void SetState(TKey stateId)
+    {
+        if (CurrentStateIndex is not null)
+        {
+            CurrentState.ExitState();
+        }
+        CurrentStateIndex = stateId;
+        CurrentState.EnterState();
+    }
+    
+    public override void _Process(double delta)
+    {
+        if (CurrentStateIndex is null) return;
+        CurrentState.ProcessState(delta);
+    }
+
+    public override void _PhysicsProcess(double delta)
+    {
+        if (CurrentStateIndex is null) return;
+        CurrentState.PhysicsProcessState(delta);
+    }
+}