.gitignore

@@ -25,11 +25,3 @@ bin/
 *.sln
 *.error
 *.key*
-.editorconfig
-
-# cs project files
-!*.csproj
-
-# Test files
-Test/bin
-Test/obj

ChessGame.csproj

@@ -1,13 +0,0 @@
-<Project Sdk="Godot.NET.Sdk/4.3.0">
-  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
-    <EnableDynamicLoading>true</EnableDynamicLoading>
-
-    <Nullable>enable</Nullable>
-    <!-- <TreatWarningsAsErrors>true</TreatWarningsAsErrors> -->
-  </PropertyGroup>
-
-  <ItemGroup>
-    <Compile Remove="Test\**\*" />
-  </ItemGroup>
-</Project>

Scenes/Entities/Chessboard.tscn

@@ -12,11 +12,7 @@ visible = false
 script = ExtResource("3_26g24")
 
 [node name="Layer0" type="TileMapLayer" parent="."]
-show_behind_parent = true
+use_parent_material = true
 position = Vector2(-8, 184)
 tile_map_data = PackedByteArray("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")
 tile_set = ExtResource("1_ws3cq")
-collision_enabled = false
-collision_visibility_mode = 2
-navigation_enabled = false
-navigation_visibility_mode = 2

Scenes/Setting.tscn

@@ -113,7 +113,6 @@ size_flags_horizontal = 3
 [node name="Button" type="Button" parent="BoxContainer/HBoxContainer/MarginContainer"]
 layout_mode = 2
 size_flags_horizontal = 3
-disabled = true
 text = "Clear Config"
 
 [node name="MarginContainer2" type="MarginContainer" parent="BoxContainer/HBoxContainer"]
@@ -122,7 +121,6 @@ size_flags_horizontal = 3
 
 [node name="Button2" type="Button" parent="BoxContainer/HBoxContainer/MarginContainer2"]
 layout_mode = 2
-disabled = true
 text = "Clear User Data"
 
 [node name="HFlowContainer" type="HFlowContainer" parent="BoxContainer"]
@@ -131,34 +129,23 @@ layout_mode = 2
 [node name="Button" type="Button" parent="BoxContainer/HFlowContainer"]
 layout_mode = 2
 size_flags_horizontal = 3
-disabled = true
 text = "GetCacheDir"
 
 [node name="Button2" type="Button" parent="BoxContainer/HFlowContainer"]
 layout_mode = 2
 size_flags_horizontal = 3
-disabled = true
 text = "GetConfigDir"
 
 [node name="Button3" type="Button" parent="BoxContainer/HFlowContainer"]
 layout_mode = 2
 size_flags_horizontal = 3
-disabled = true
 text = "GetDataDir"
 
 [node name="Button4" type="Button" parent="BoxContainer/HFlowContainer"]
 layout_mode = 2
 size_flags_horizontal = 3
-disabled = true
 text = "GetUserDataDir"
 
-[node name="MarginContainer8" type="MarginContainer" parent="BoxContainer"]
-layout_mode = 2
-
-[node name="ColorPickerButton" type="ColorPickerButton" parent="BoxContainer/MarginContainer8"]
-layout_mode = 2
-text = "Trace Color"
-
 [connection signal="pressed" from="BoxContainer/MarginContainer/Back" to="." method="OnBack"]
 [connection signal="pressed" from="BoxContainer/MarginContainer7/Button" to="." method="OnSave"]
 [connection signal="text_changed" from="BoxContainer/MarginContainer2/Server/LineEdit" to="." method="OnServerUrlChanged"]

Scripts/Controllers/ChessGame.cs

@@ -1,28 +1,29 @@
-#nullable disable
+using System.Collections;
 using Godot;
 using Godot.Collections;
-using ChineseChess;
 
 public partial class ChessGame : Node2D {
 	ChessBoard board;
 	Global global;
 	ConfirmationDialog dialog;
 	private bool isSession = false;
-	ChessCore Game;
+
-	ChessCore.TurnsSideType sideSelf;
+	private Player playerSelf;
-	ChessCore.TurnsSideType sideOpposite;
+	private Player playerOpponent;
 
 	// Called when the node enters the scene tree for the first time.
-	public override void _Ready() {
+	public override void _Ready()
+	{
 		// Init.Call();
 		global = GetNode<Global>("/root/Global");
 		board = GetNode<ChessBoard>("Chessboard");
 		isSession = global.RPClient.IsOnline();
 
+		playerSelf = new Player(board.board, Player.PlayerType.Human);
+		playerOpponent = new Player(board.board, Player.PlayerType.Human);
+		InitChessBoard();
 		GetNode<LineEdit>("Control/VBoxContainer/MarginContainer3/HFlowContainer/LineEdit")
 			.Text = global.GlobalData["player_color"].AsString();
-		LineEdit turnSideEdit = GetNode<LineEdit>("Control/VBoxContainer/MarginContainer3/HFlowContainer/LineEdit2");
-		turnSideEdit.Text = "red";
 		GD.PrintErr("ChessGame ", global.RPClient.GetUserId(), ":",global.GlobalData["player_color"]);
 
         dialog = new ConfirmationDialog {
@@ -32,40 +33,18 @@ public partial class ChessGame : Node2D {
         };
 		AddChild(dialog);
 
-		if (global.GlobalData["player_color"].AsString() == "red") {
-			sideSelf = ChessCore.TurnsSideType.Red;
-			sideOpposite = ChessCore.TurnsSideType.Black;
-		} else {
-			sideSelf = ChessCore.TurnsSideType.Black;
-			sideOpposite = ChessCore.TurnsSideType.Red;
-		}
-
-		// if (isSession) {
-		// 	Game = new(ChessCore.Mode.MultiMode, sideSelf);
-		// } else {
-		// 	Game = new(ChessCore.Mode.SingleMode, sideSelf);
-		// }
-		Game = new(isSession ? ChessCore.Mode.MultiMode : ChessCore.Mode.SingleMode, sideSelf, board);
-		Game.Init();
-
-		board.OnStepsChanged += (sender, e) => {
-			turnSideEdit.Text = Game.GetTurnsType() == ChessCore.TurnsSideType.Red ? "red" : "black";
-		};
-
 		board.OnPosClicked += (sender, pos) => {
-			int posX = (int)pos.X;
-			int posY = (int)pos.Y;
-			Vector.Vector2I vector = new(posX, posY);
 			if (isSession) {
-				Game.OnPosClicked(vector, ChessCore.PlayerSideType.Self);
 				var res = global.RPClient.SendSessionToAll(global.sessionId, new Dictionary {
 						{"type", "mouseClicked"},
 						{"X", pos.X},
 						{"Y", pos.Y},
 						{"id", global.RPClient.GetUserId()}
 					});
+				playerSelf.HandleBoardPosClick(pos);
 			} else {
-				Game.OnPosClicked(vector);
+				playerSelf.HandleBoardPosClick(pos);
+				playerSelf.SetAllowedPieces(null);
 			}
 		};
 
@@ -86,6 +65,44 @@ public partial class ChessGame : Node2D {
 	public override void _Process(double delta) {
 	}
 
+	public void InitChessBoard() {
+        ArrayList black = InitializePieces("black", 0, new[] {
+        ("车", 0, 0), ("马", 1, 0), ("象", 2, 0),
+		("士", 3, 0), ("将", 4, 0), ("士", 5, 0),
+		("象", 6, 0), ("马", 7, 0), ("车", 8, 0),
+        ("炮", 1, 2), ("炮", 7, 2),
+        ("卒", 0, 3), ("卒", 2, 3), ("卒", 4, 3), ("卒", 6, 3), ("卒", 8, 3)
+    	});
+
+        ArrayList red = InitializePieces("red", 9, new[] {
+        ("车", 0, -0), ("马", 1, -0), ("象", 2, -0),
+		("士", 3, -0), ("将", 4, -0), ("士", 5, -0),
+		("象", 6, -0), ("马", 7, -0), ("车", 8, -0),
+        ("炮", 1, -2), ("炮", 7, -2),
+        ("卒", 0, -3), ("卒", 2, -3), ("卒", 4, -3), ("卒", 6, -3), ("卒", 8, -3)
+    	});
+		if (global.GlobalData["player_color"].AsString() == "red") {
+			playerSelf.SetAllowedPieces(red);
+			playerOpponent.SetAllowedPieces(black);
+		} else {
+			playerSelf.SetAllowedPieces(black);
+			playerOpponent.SetAllowedPieces(red);
+		}
+    }
+
+    private ArrayList InitializePieces(string color, int baseY, (string label, int x, int y)[] positions) {
+		ArrayList list = new();      
+		foreach (var (label, x, y) in positions) {
+            ChessPiece piece = new ChessPiece {
+                PieceLabel = label,
+                LabelColor = new Color(color)
+            };
+			list.Add(piece.GetVirtualPiece());
+            board.InsertNode(piece, new Vector2(x, baseY + y));
+        }
+		return list;
+    }
+
 	private void SessionMsgHandle(Dictionary msg) {
 		GD.PrintErr($"session msg: {msg}");
 		switch (msg["type"].AsString()) {
@@ -103,18 +120,25 @@ public partial class ChessGame : Node2D {
 				}
 				Vector2 mouseClicked = new(GD.StrToVar(msg["X"].ToString()).AsInt32(),
 					GD.StrToVar(msg["Y"].ToString()).AsInt32());
-				Vector.Vector2I vector = new((int)mouseClicked.X, (int)mouseClicked.Y);
+				playerOpponent.HandleBoardPosClick(mouseClicked);
-				Game.OnPosClicked(vector, ChessCore.PlayerSideType.Opponent);
 				break;
 			case "undo":
-				Game.Undo();
+				if (msg["id"].ToString() == global.RPClient.GetUserId()) {
+					break;
+				}
+				playerOpponent.Undo();
 				break;
 			case "reInit":
-				Game.ReInit();
+			 	_ReInit();
 				break;
 		}
 	}
 
+	private void _ReInit() {
+		playerSelf.ReInit();
+		InitChessBoard();
+	}
+
 	private void BtnOver() {
 		GD.Print($"BtnOver {isSession}");
 		if (isSession == false) {
@@ -137,13 +161,13 @@ public partial class ChessGame : Node2D {
 		GD.Print($"Undo {isSession}");
 
 		if (isSession) {
+			playerSelf.Undo();
 			global.RPClient.SendSessionToAll(global.sessionId, new Dictionary{
 				{"type", "undo"},
 				{"id", global.RPClient.GetUserId()},
 			});
 		} else {
-			if (Game.board.Steps == 0) board.Clear();
+			playerSelf.Undo();
-			Game.Undo();
 		}
 	}
 
@@ -155,8 +179,7 @@ public partial class ChessGame : Node2D {
 				{"type", "reInit"},
 			});
 		} else {
-			Game.ReInit();
+			_ReInit();
-			board.Clear();
 		}
 	}
 }

Scripts/Controllers/GameLobby.cs

@@ -1,4 +1,3 @@
-#nullable disable
 using Godot;
 using Godot.Collections;
 

Scripts/Entities/ChessBoard.cs

@@ -1,87 +1,53 @@
 // Chessboard.cs
 using System;
 using Godot;
-using ChineseChess;
-using Godot.Collections;
 
-using static IBoard;
+public partial class ChessBoard : Node2D {
-public partial class ChessBoard : Node2D, ICCBoardOn {
+	public VirtualBoard board = null;
-    public event EventHandler<Vector2>? OnMouseClicked;
+	public Player playerSelf = null;
-	public event EventHandler<Vector2>? OnPosClicked;
-	public event EventHandler<int>? OnStepsChanged;
 
-	public Vector2 from = Vector2.Inf, to = Vector2.Inf;
+	public delegate bool ChessMoveFunc(Vector2 toPos, Vector2 fromPos);
-	public Array<Vector2> canMovePos = [];
+	// public Callable chessMoveFunc { get; set; }
+    public event EventHandler<Vector2> OnMouseClicked;
+	public event EventHandler<Vector2> OnPosClicked;
 
 	public override void _Ready() {
+		board = new VirtualBoard(9, 10);
+		playerSelf = new Player(board);
+
+		board.OnRemove += (sender, piece) => {
+			if (piece.data != null) {
+				RemoveChild(piece.data as Node);
+			}
+		};
+
+		board.OnInsert += (sender, piece) => {
+			if (piece.data != null) {
+				AddChild(piece.data as Node);
+			}
+		};
+
+		// board.OnMove += (sender, args) => {
+		// 	// chessMoveFunc.Call(args.To, args.From);
+		// };
 	}
 	
-	public void Clear() {
+	public override void _Input(InputEvent @event) {
-		from = to = Vector2.Inf;
-		QueueRedraw();
-	}
-
-	void IBoardOn.OnInsert(object self, IPiece piece) {
-		ChessPiece? node = piece.On as ChessPiece;
-        // throw new InvalidOperationException();
-        node ??= new ChessPiece((CCPiece)piece);
-		node.ShowBehindParent = true;
-        AddChild(node);
-
-			// ChessPiece chessPiece = null;
-			// if (piece.Data.TryGetValue("Godot", out object node)) {
-			// 	chessPiece = node as ChessPiece;
-			// } else {
-			// 	chessPiece = new((CCPiece)piece);
-			// }
-			// chessPiece.ShowBehindParent = true;
-			// AddChild(chessPiece);
-	}
-
-	void IBoardOn.OnRemove(object self, IPiece piece) {
-		if (piece.On is not ChessPiece node) {
-			throw new InvalidOperationException();
-		}
-		RemoveChild(node);
-	}
-
-	void IBoardOn.OnMove(object self, IBoardOn.MoveEventArgs vals) {
-		from = PosTrans.transArrToPix * new Vector2(vals.From.X, vals.From.Y);
-		to = PosTrans.transArrToPix * new Vector2(vals.To.X, vals.To.Y);
-		QueueRedraw();
-	}
-
-	void ICCBoardOn.OnSteps(object _self, int oldSteps) {
-		if (_self is not CCBoard self) return;
-		OnStepsChanged?.Invoke(self, self.Steps);
-	}
-
-	public override void _Draw() {
-		Color color = new(0.7f, 0.7f, 0.7f, 0.5f);
-		DrawLine(from, to, color, PosTrans.pixGripSize / 5);
-		DrawCircle(from, PosTrans.pixGripSize / 2.2f, color);
-		foreach (Vector2 pos in canMovePos) {
-			DrawCircle(pos, PosTrans.pixGripSize / 2.2f,
-				 color.Inverted());
-		}
-    }
-
-    public override void _Input(InputEvent @event) {
 		if (@event is InputEventMouseButton mouseEvent &&
-				mouseEvent.Pressed &&
+			mouseEvent.Pressed &&
-				mouseEvent.ButtonIndex == MouseButton.Left) {
+			mouseEvent.ButtonIndex == MouseButton.Left) {
+			// HandleMouseClick(GetGlobalTransformWithCanvas().AffineInverse() * mouseButton.Position);
+			
             OnMouseClicked?.Invoke(this, GetLocalMousePosition());
 			OnPosClicked?.Invoke(this, (PosTrans.transArrToPix.AffineInverse() *
 				GetLocalMousePosition()).Round());
 		}
 	}
 
-	public static class PosTrans {
+	public void InsertNode(ChessPiece node, Vector2 arrayPos) {
-		public static readonly int pixGripSize = 32;
+		AddChild(node);
-		public static readonly Transform2D transArrToPix = new(
+		VirtualPiece piece = node.GetVirtualPiece();
-			new Vector2(pixGripSize, 0),
+		// piece.Move(vector);
-			new Vector2(0, pixGripSize),
+		board.SetPiecePos(piece, arrayPos);
-			new Vector2(-4, -4.5f) * pixGripSize
-		);
 	}
 }

Scripts/Entities/ChessPiece.cs

@@ -1,40 +1,34 @@
 // Chesspiece.cs
 using Godot;
-using ChineseChess;
-using System.Linq;
-using System;
 
-using static IPiece;
+public partial class ChessPiece : Sprite2D {
-public partial class ChessPiece : Sprite2D, IPieceOn {
+    // 文字内容
     [Export]
-    public string? PieceLabel { get; set; } = null;
+    public string PieceLabel { get; set; } = null;
-    // Text Color (Can Export for Editor Adjust)
+    // 文字颜色（可导出以编辑器调整）
     [Export]
-    public Color LabelColor { get; set; } = new Color("white");
+    public Color LabelColor { get; set; } = new Color("black");
     private Vector2 textureSize;
-    private Label? labelOfChessName;
 
-    void IPieceOn.OnPos(object _self, Vector.Vector2I oldPos) {
+    private Label labelOfChessName;
-        if (_self is not CCPiece self) return;
+    private readonly VirtualPiece piece;
-        Position = ChessBoard.PosTrans.transArrToPix * new Vector2(self.Pos.X, self.Pos.Y);
+
+    public VirtualPiece GetVirtualPiece() {
+        return piece;
     }
 
-    void IPieceOn.OnSelected(object _self, bool oldIsSelected) {
+    private void OnMove(Vector2 newPos) {
-        if (GetParent() is not ChessBoard chessBoard || _self is not CCPiece self) return;
+        Position = PosTrans.transArrToPix * new Vector2(newPos.X, newPos.Y);
-        if (self.IsSelected) {
+    }
-            GD.Print($"{self.Pos} is selected");
+
+    public void OnSelected(bool isSelected) {
+        if (isSelected) {
+            GD.Print($"{piece.Pos()} is selected");
             Transform *= transToSeleted;
-            foreach (var item in self.CanMoveAllPos()) {
-                chessBoard.canMovePos.Add(ChessBoard.PosTrans.transArrToPix * new Vector2(item.X, item.Y));
-            }
         } else {
-            GD.Print($"{self.Pos} is deselected");
+            GD.Print($"{piece.Pos()} is deselected");
             Transform *= transToSeleted.AffineInverse();
-            foreach (var item in self.CanMoveAllPos()) {
-                chessBoard.canMovePos.Remove(ChessBoard.PosTrans.transArrToPix * new Vector2(item.X, item.Y));
-            }
         }
-        chessBoard.QueueRedraw();
     }
 
     Transform2D transToSeleted = new(
@@ -43,24 +37,24 @@ public partial class ChessPiece : Sprite2D, IPieceOn {
 		new Vector2(0, 0)
 	);
 
-    public ChessPiece() : this(new CCPiece()) {
+    public ChessPiece() : this("", Vector2.Zero){
     }
 
-    public ChessPiece(CCPiece piece) {
+    public ChessPiece(string name, Vector2 pos) {
-        PieceLabel = piece.CNName;
+        PieceLabel = name;
-        LabelColor = piece.TurnsSide == ChessCore.TurnsSideType.Red ? new Color("red") : new Color("black");
+        piece = new VirtualPiece(name, pos);
-        piece.On = this;
+        piece.OnMove +=  OnMove;
-        // Must Be Call for init Pos
+        piece.OnSelected += OnSelected;
-        piece.On.OnPos(piece, piece.Pos);
+        piece.data = this;
-        piece.Data.TryAdd("Godot", this);
     }
 
-    // Called when the node enters the scene tree for the first time.
+	// Called when the node enters the scene tree for the first time.
-    public override void _Ready() {
+	public override void _Ready() {
         InitLabel();
 	}
 
     private void InitLabel() {
+        // this.Texture.ResourcePath = "res://Asserts/ChesspieceBase.tres";
         Texture ??= (Texture2D)ResourceLoader.Load("res://Asserts/ChesspieceBase.tres");
         textureSize = Texture.GetSize();
         Vector2 labalPosition = new(

Scripts/Global.cs

@@ -1,15 +1,15 @@
-#nullable disable
 using System.Collections.Generic;
 using Godot;
 using RPPackage;
 
-public partial class Global : Node {
+public partial class Global : Node
+{
 	public RPClientEDWS RPClient = new();
 	public string sessionId;
 	public Node CurrentScene { get; set; }
 	public Theme GlobalTheme = null;
 
-	readonly GodotConfigManager GlobalConfig = new("user://config.cfg");
+    readonly GodotConfigManager GlobalConfig = new("user://config.cfg");
 	public Dictionary<string, Variant> GlobalConfigDict = new() {
 		{"font_size", 20},
 		{"server_url", "wss://game.zzyxyz.com/"},
@@ -21,7 +21,8 @@ public partial class Global : Node {
 	};
 
 	// Called when the node enters the scene tree for the first time.
-	public override void _Ready() {
+	public override void _Ready()
+	{
 		if (OS.GetName() == "Android") {
 			bool ret = OS.RequestPermissions();
 			GD.Print($"RequestPermissions ret is {ret}");
@@ -36,36 +37,41 @@ public partial class Global : Node {
 		};
 
 		Viewport root = GetTree().Root;
-		CurrentScene = root.GetChild(root.GetChildCount() - 1);
+        CurrentScene = root.GetChild(root.GetChildCount() - 1);
 
 		GlobalConfig.LoadConfig("Global", GlobalConfigDict);
 		SetProcess(false);
 	}
 
-	public void ConfigFlush() {
+	public void ConfigFlush()
+	{
 		int font_size = (int)GlobalConfigDict["font_size"];
 		GlobalTheme.DefaultFontSize = font_size;
 		// GlobalTheme?.SetFontSize("font_size", "Label",    font_size);
-		// GlobalTheme?.SetFontSize("font_size", "Button",   font_size);
+        // GlobalTheme?.SetFontSize("font_size", "Button",   font_size);
-		// GlobalTheme?.SetFontSize("font_size", "TextEdit", font_size);
+        // GlobalTheme?.SetFontSize("font_size", "TextEdit", font_size);
-		// GlobalTheme?.SetFontSize("font_size", "LineEdit", font_size);
+        // GlobalTheme?.SetFontSize("font_size", "LineEdit", font_size);
 		// CurrentScene.GetWindow().AddThemeFontSizeOverride("Control", (int)GlobalConfigDict["font_size"]);
 	}
 
-	private void OnGotoScene() {
+	private void OnGotoScene()
+	{
 		ConfigFlush();
 	}
 
-	public void SaveConfig() {
+	public void SaveConfig()
+	{
 		GlobalConfig.SaveConfig("Global", GlobalConfigDict);
 	}
 
 	// Called every frame. 'delta' is the elapsed time since the previous frame.
-	public override void _Process(double delta) {
+	public override void _Process(double delta)
+	{
 		RPClient.PollEx(delta);
 	}
 
-	public override void _Notification(int what) {
+	public override void _Notification(int what)
+	{
 		if (what == NotificationWMCloseRequest) {
 			// SaveConfig();
 			RPClient.Close();
@@ -75,7 +81,8 @@ public partial class Global : Node {
 
 	public delegate void ChangeSceneCallback(Node newSence);
 	private static ChangeSceneCallback changeSceneCallback = null;
-	public void GotoScene(string path, ChangeSceneCallback callback = null) {
+	public void GotoScene(string path, ChangeSceneCallback callback = null)
+	{
 		// 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
@@ -93,7 +100,8 @@ public partial class Global : Node {
 		changeSceneCallback = null;
 	}
 
-	public void DeferredGotoScene(string path, Callable onLoaded) {
+	public void DeferredGotoScene(string path, Callable onLoaded)
+	{
 		// It is now safe to remove the current scene.
 		CurrentScene.Free();
 

Scripts/Lib/RPClient.cs

@@ -4,26 +4,21 @@ using Godot.Collections;
 namespace RPPackage {
 public partial class RPClientBaseEDWS : EventDrivenWebSocket {
 
-    public delegate void RPClientEventHandler(string cmd, Dictionary? data);
+    public delegate void RPClientEventHandler(string cmd, Dictionary data);
     public delegate void RPClientErrorHandler(string errCode, string type, string cmd, string errMsg);
 
-    public event RPClientEventHandler? OnRPCUser;
+    public event RPClientEventHandler OnRPCUser;
-    public event RPClientEventHandler? OnRPCRegion;
+    public event RPClientEventHandler OnRPCRegion;
-    public event RPClientEventHandler? OnRPCSession;
+    public event RPClientEventHandler OnRPCSession;
-    public event RPClientEventHandler? OnRPCMsg;
+    public event RPClientEventHandler OnRPCMsg;
-    public event RPClientErrorHandler? OnRPCError;
+    public event RPClientErrorHandler OnRPCError;
 
     public RPClientBaseEDWS() : base() {
         OnText += (text) => {
             // GD.Print($"response: {text}");
-            RPMessage? msg = RPHelper.HandleIncomingMessage(text);
+            RPMessage msg = RPHelper.HandleIncomingMessage(text);
-            if (msg == null) {
-                MakeRPCError("9999", "Unknown Msg", "Error", null);
-                return;
-            }
             if (msg.Code != "0000") {
-                OnRPCError?.Invoke(msg.Code ?? "9999", msg.Type, msg.Cmd,
+                OnRPCError?.Invoke(msg.Code, msg.Type, msg.Cmd, msg.Data.ToString());
-                        msg.Data?.ToString() ?? "");
                 return;
             }
             switch (msg.Type) {
@@ -40,36 +35,32 @@ public partial class RPClientBaseEDWS : EventDrivenWebSocket {
                     OnRPCMsg?.Invoke(msg.Cmd, msg.Data);
                     break;
                 default:
-                    MakeRPCError(msg.Code, "unknown", msg.Cmd, msg.Data?.ToString());
+                    OnRPCError?.Invoke(msg.Code, "unknown", msg.Cmd, msg.Data.ToString());
                     break;
             }
         };
     }
 
-    protected void MakeRPCError(string errCode, string type, string cmd, string? errMsg) {
+    protected void MakeRPCError(string errCode, string type, string cmd, string errMsg) {
-        OnRPCError?.Invoke(errCode, type, cmd, errMsg ?? "null");
+        this.OnRPCError?.Invoke(errCode, type, cmd, errMsg ?? "null");
     }
 }
 
 public partial class RPClientEDWS : RPClientBaseEDWS {
-    string? userName;
+    string userName;
-    string? userId;
+    string userId;
-    string? userToken;
+    string userToken;
-    string? regionId;
+    string regionId;
 
-    public string? GetUserId() { return userId; }
+    public string GetUserId() { return userId; }
     
-    public delegate void SessionRecvHandle(Dictionary? msg);
+    public delegate void SessionRecvHandle(Dictionary msg);
-    public event SessionRecvHandle? OnPRCSessionRecv;
+    public event SessionRecvHandle OnPRCSessionRecv;
 
-    public event RPClientEventHandler? OnPRCSessionExit;
+    public event RPClientEventHandler OnPRCSessionExit;
 
     public RPClientEDWS() : base() {
         OnRPCUser += (cmd, msg) => {
-            if (msg == null) {
-                MakeRPCError("0000", "User", "unknown", "unknown");
-                return;
-            }
             switch (cmd) {
                 case "init":
                     userId = msg["userId"].AsString();
@@ -122,7 +113,7 @@ public partial class RPClientEDWS : RPClientBaseEDWS {
         OnRPCMsg += (cmd, msg) => {
             switch(cmd) {
                 case "echo":
-                    GD.Print(msg?["_"].AsString());
+                    GD.Print(msg["_"].AsString());
                     break;
                 default:
                     break;
@@ -157,7 +148,7 @@ public partial class RPClientEDWS : RPClientBaseEDWS {
     }
 
     public delegate bool UserInitCallback();
-    private UserInitCallback? _userInitCallback;
+    private UserInitCallback _userInitCallback;
     public bool UserInit(string userName, string fingerPrint, UserInitCallback callback) {
         if (this.GetIsConnected() == false) {
             return false;
@@ -210,14 +201,14 @@ public partial class RPClientEDWS : RPClientBaseEDWS {
     public delegate bool RegionInspectCallback(
         Array<Dictionary<string, string>> _
     );
-    private RPClientEventHandler? _regionRecvCallback;
+    private RPClientEventHandler _regionRecvCallback;
     public bool RegionInspect(string regionId, RegionInspectCallback callback) {
         if (this.GetIsConnected() == false || this.userId == null) {
             return false;
         }
         _regionRecvCallback = null;
         _regionRecvCallback += (cmd, msg) => {
-            if (cmd != "inspect" || msg == null) {
+            if (cmd != "inspect") {
                 return;
             }
             callback(msg["_"].AsGodotArray<Dictionary<string, string>>());
@@ -237,18 +228,17 @@ public partial class RPClientEDWS : RPClientBaseEDWS {
     public delegate bool SessionAckCreateCallback(
         string sessionId,
         bool res,
-        string? reqUserId,
+        string reqUserId,
-        string? reqUserName
+        string reqUserName
     );
-    private RPClientEventHandler? _sessionAckCreateCallback;
+    private RPClientEventHandler _sessionAckCreateCallback;
     public void RegSessionAckCreateCallback(SessionAckCreateCallback recvCallback) {
         _sessionAckCreateCallback = null;
         _sessionAckCreateCallback += (cmd, msg) => {
-            if (msg == null) return;
             string sessionId = msg["sessionId"].AsString();
             bool res = msg.ContainsKey("res") && msg["res"].AsBool();
-            string? reqUserId = msg.ContainsKey("reqUserId") ? msg["reqUserId"].AsString() : null;
+            string reqUserId = msg.ContainsKey("reqUserId") ? msg["reqUserId"].AsString() : null;
-            string? reqUserName = msg.ContainsKey("reqUserName") ? msg["reqUserName"].AsString() : null;
+            string reqUserName = msg.ContainsKey("reqUserName") ? msg["reqUserName"].AsString() : null;
             recvCallback(sessionId, res, reqUserId, reqUserName);
         };
     }

Scripts/Lib/RPHelper.cs

@@ -9,14 +9,12 @@ public static class RPHelper
         return message.ToDictionary();
     }
 
-    public static RPMessage? DeserializeRPMessage(Dictionary data)
+    public static RPMessage DeserializeRPMessage(Dictionary data)
     {
-        if (!data.ContainsKey("type") || !data.ContainsKey("cmd")) {
+        return new RPMessage
-            return null;
+        {
-        }
+            Type    = data.ContainsKey("type") ? (string)data["type"] : null,
-        return new RPMessage {
+            Cmd     = data.ContainsKey("cmd") ? (string)data["cmd"] : null,
-            Type    = (string)data["type"],
-            Cmd     = (string)data["cmd"],
             Code    = data.ContainsKey("code") ? (string)data["code"] : null,
             Uid     = data.ContainsKey("uid") ? (string)data["uid"] : null,
             Token   = data.ContainsKey("token") ? (string)data["token"] : null,
@@ -30,7 +28,7 @@ public static class RPHelper
         ws.SendJsonEx(RPHelper.SerializeRPMessage(message));
     }
 
-    public static RPMessage? HandleIncomingMessage(string jsonMessage)
+    public static RPMessage HandleIncomingMessage(string jsonMessage)
     {
         var dataDict = Json.ParseString(jsonMessage).AsGodotDictionary();
         if (dataDict != null)

Scripts/Lib/RPMessage.cs

@@ -4,21 +4,20 @@ using Godot.Collections;
 namespace RPPackage {
 public class RPMessage
 {
-    public string Type { get; set; } = string.Empty;
+    public string Type { get; set; }
-    public string Cmd { get; set; } = string.Empty;
+    public string Cmd { get; set; }
-    public Dictionary? Data { get; set; }
+    public Dictionary Data { get; set; }
     
-    public string? Uid { get; set; }
+    public string Uid { get; set; }
-    public string? Token { get; set; }
+    public string Token { get; set; }
-    public string? Code { get; set; }
+    public string Code { get; set; }
     public Dictionary ToDictionary()
     {
-        var dict = new Dictionary {
+        var dict = new Dictionary();
-            // if (Type != null)
+        if (Type != null)
-            { "type", Type },
+            dict.Add("type", Type);
-            // if (Cmd != null)
+        if (Cmd != null)
-            { "cmd", Cmd }
+            dict.Add("cmd", Cmd);
-        };
         if (Data != null)
             dict.Add("data", Data);
         

Scripts/Lib/gdws.cs

@@ -2,16 +2,16 @@ using Godot;
 using Godot.Collections;
 
 public partial class EventDrivenWebSocket : WebSocketPeer {
-    public delegate void WebSocketEventHandler(string eventName, params object[]? args);
+    public delegate void WebSocketEventHandler(string eventName, params object[] args);
     public delegate void WSBinMsgEventHandler(byte[] args);
     public delegate void WSMsgEventHandler(string args);
 
-    public event WebSocketEventHandler? OnOpen;
+    public event WebSocketEventHandler OnOpen;
-    public event WSBinMsgEventHandler? OnMessage;
+    public event WSBinMsgEventHandler OnMessage;
-    public event WSMsgEventHandler? OnText;
+    public event WSMsgEventHandler OnText;
-    public event WSBinMsgEventHandler? OnBinary;
+    public event WSBinMsgEventHandler OnBinary;
-    public event WebSocketEventHandler? OnClose;
+    public event WebSocketEventHandler OnClose;
-    public event WebSocketEventHandler? OnError;
+    public event WebSocketEventHandler OnError;
 
     private bool isConnected = false;
     private bool isCloseEventFired = false;
@@ -32,7 +32,7 @@ public partial class EventDrivenWebSocket : WebSocketPeer {
     }
 
     public void ConnectToUrlEx(string url, double delayTime = 3,
-        TlsOptions? tlsClientOptions = null) {
+        TlsOptions tlsClientOptions = null) {
         if (connectingTime >= 0) {
             return;
         }

Scripts/Src/AbstractBoard.cs

@@ -1,117 +0,0 @@
-using System.Collections.Generic;
-using Vector2I = Vector.Vector2I;
-
-using static IBoard;
-public abstract class AbstractBoard(int rows, int cols, int maxRecords = int.MaxValue,
-        IBoardOn? on = null) : IBoard {
-    private readonly int rows = rows;
-    private readonly int cols = cols;
-    protected readonly IPiece?[,] pieces = new IPiece[rows, cols];
-    protected readonly List<MoveRecord> moveRecords = [];
-    protected readonly int MAX_RECORDS = maxRecords;
-
-    public int Rows => rows;
-    public int Cols => cols;
-    protected IBoardOn? on = on;
-
-    public virtual IBoardOn? On { get => on; set => on = value; }
-
-    public virtual bool IsPosOutOfRange(Vector2I arrayPos) {
-        return arrayPos.X < 0 || arrayPos.X >= Rows || arrayPos.Y < 0 || arrayPos.Y >= Cols;
-    }
-
-    public virtual IPiece? GetPiece(Vector2I arrayPos) {
-        if (IsPosOutOfRange(arrayPos)) return null;
-        return pieces[arrayPos.X, arrayPos.Y];
-    }
-
-    public virtual IPiece? SetPiece(IPiece? piece, Vector2I pos) {
-        if (IsPosOutOfRange(pos)) return null;
-        
-        IPiece? oldPiece = pieces[pos.X, pos.Y];
-        pieces[pos.X, pos.Y] = piece;
-        if (piece is not null) piece.Pos = pos;
-        // if (oldPiece != null) oldPiece.Pos = Vector2I.Zero;
-
-        on?.OnSetPieceInteral(this, new IBoardOn.SetPieceEventArgs
-            (oldPiece, piece, pos));
-        return oldPiece;
-    }
-
-    public virtual bool InsertPiece(IPiece piece, Vector2I pos) {
-        if (GetPiece(pos) is not null && piece == null) {
-            return false;
-        }
-
-        on?.OnInsert(this, piece);
-        SetPiece(piece, pos);
-        return true;
-    }
-
-    public virtual bool MovePiece(Vector2I from, Vector2I to) {
-        if (IsPosOutOfRange(to) || IsPosOutOfRange(from)) {
-            return false;
-        }
-
-        IPiece? piece = GetPiece(from);
-        if (GetPiece(to) is not null || piece is null) {
-            return false;
-        }
-
-        on?.OnMove(this, new IBoardOn.MoveEventArgs(piece, from, to));
-        SetPiece(null, from);
-        SetPiece(piece, to);
-        return true;
-    }
-
-    public virtual IPiece? RemovePiece(Vector2I pos) {
-        IPiece? piece = GetPiece(pos);
-        if (piece is null) return null;
-        
-        on?.OnRemove(this, piece);
-        return SetPiece(null, pos);
-    }
-
-    public virtual void Clear() { Clear(true); }
-
-    public virtual void Clear(bool clearRecords) {
-        for (int i = 0; i < Rows; i++) {
-            for (int j = 0; j < Cols; j++) {
-                RemovePiece(new Vector2I(i, j));
-            }
-        }
-        if (clearRecords) ClearRecords();
-    }
-
-    public virtual void ClearRecords() {
-        moveRecords.Clear();
-    }
-
-    public virtual void AddRecord(IPiece? From, IPiece? To, Vector2I FromPos, Vector2I ToPos) {
-        if (moveRecords.Count >= MAX_RECORDS) {
-            moveRecords.RemoveAt(0);
-        }
-        MoveRecord record = new(From, To, FromPos, ToPos);
-
-        on?.OnAddRecord(this, record);
-        moveRecords.Add(record);
-    }
-    
-    public virtual void UndoRecord() {
-        if (moveRecords.Count == 0) return;
-        MoveRecord record = moveRecords[^1];
-        moveRecords.RemoveAt(moveRecords.Count - 1);
-
-        // 恢复新位置的棋子，order is very inmportant
-        if (record.From is not null) {
-            MovePiece(record.ToPos, record.FromPos);
-        }
-        
-        // 恢复旧位置的棋子
-        if (record.To is not null) {
-            InsertPiece(record.To, record.ToPos);
-        }
-
-        on?.OnUndoRecord(this, record);
-    }
-}

Scripts/Src/AbstractPiece.cs

@@ -1,67 +0,0 @@
-using System.Collections.Generic;
-using Vector2I = Vector.Vector2I;
-
-using static IPiece;
-public abstract class AbstractPiece(string name = "", Vector2I? pos = null,
-        IPieceOn? on = null) : IPiece {
-    private Vector2I pos = pos ?? new(); // 注意这个坐标的非像素坐标而是棋盘坐标
-    private bool isSelected = false;
-    protected string name = name;
-    private Dictionary<string, object> data = [];
-    protected IPieceOn? on = on;
-
-    public virtual IPieceOn? On { get => on; set => on = value; }
-
-    public virtual Vector2I Pos {
-        get => pos;
-        set {
-            if (pos != value) {
-                var oldPos = pos;
-                pos = value;
-                on?.OnPos(this, oldPos);
-            }
-        }
-    }
-
-    public virtual bool IsSelected {
-        get => isSelected;
-        set {
-            if (isSelected != value) {
-                var oldIsSelected = isSelected;
-                isSelected = value;
-                on?.OnSelected(this, oldIsSelected);
-            }
-        }
-    }
-
-    public virtual string Name {
-        get => name;
-        set {
-            if (name != value) {
-                var oldName = name;
-                name = value;
-                on?.OnName(this, oldName);
-            }
-        }
-    }
-
-    public virtual Dictionary<string, object> Data {
-        get => data;
-        set => data = value;
-    }
-
-    public virtual bool Move(Vector2I pos) {
-        if (!CanMove(pos)) {
-            return false;
-        }
-        Pos = pos;
-        on?.OnMove(this, pos);
-        return true;
-    }
-
-    public abstract bool CanMove(Vector2I to);
-
-    public override string ToString() {
-        return $"{Name} at {pos}";
-    }
-}

Scripts/Src/ChineseChess/CCBoard.cs

@@ -1,89 +0,0 @@
-using System.Collections;
-using static ChineseChess.ChessCore;
-using Vector2I = Vector.Vector2I;
-
-namespace ChineseChess;
-public interface ICCBoardOn : IBoard.IBoardOn {
-    void OnSteps(object self, int oldSteps) {}
-}
-
-public class CCBoard(ICCBoardOn? on = null) : AbstractBoard(9, 10, on: on) {
-    private int steps = 0;
-    protected new ICCBoardOn? on = on;
-    // public virtual IPieceOn? On { get => on; set => on = value; }
-    public new ICCBoardOn? On { get => on; set {
-        on = value; base.on = value;} }
-
-    public int Steps {
-        get => steps;
-        protected set {
-            if (steps != value) {
-                var oldSteps = steps;
-                steps = value;
-                on?.OnSteps(this, oldSteps);
-            }
-        }
-    }
-
-    public override void AddRecord(IPiece? From, IPiece? To, Vector2I FromPos, Vector2I ToPos) {
-        base.AddRecord(From, To, FromPos, ToPos);
-        Steps += 1;
-    }
-
-    public override void UndoRecord() {
-		base.UndoRecord();
-        if (Steps > 0) Steps -= 1;
-	}
-
-    public (ArrayList, ArrayList) InitGame() {
-        Steps = 0;
-        ArrayList blackPart = InitOnePartPieces(TurnsSideType.Black, [
-            new CCChariot (this, TurnsSideType.Black, new Vector2I( 4, 0)),
-            new CCHorse   (this, TurnsSideType.Black, new Vector2I( 3, 0)),
-            new CCElephant(this, TurnsSideType.Black, new Vector2I( 2, 0)),
-            new CCAdvisor (this, TurnsSideType.Black, new Vector2I( 1, 0)),
-            new CCGeneral (this, TurnsSideType.Black, new Vector2I( 0, 0)),
-            new CCAdvisor (this, TurnsSideType.Black, new Vector2I(-1, 0)),
-            new CCElephant(this, TurnsSideType.Black, new Vector2I(-2, 0)),
-            new CCHorse   (this, TurnsSideType.Black, new Vector2I(-3, 0)),
-            new CCChariot (this, TurnsSideType.Black, new Vector2I(-4, 0)),
-            new CCCannon  (this, TurnsSideType.Black, new Vector2I( 3, 2)),
-            new CCCannon  (this, TurnsSideType.Black, new Vector2I(-3, 2)),
-            new CCPawn    (this, TurnsSideType.Black, new Vector2I(-4, 3)),
-            new CCPawn    (this, TurnsSideType.Black, new Vector2I(-2, 3)),
-            new CCPawn    (this, TurnsSideType.Black, new Vector2I( 0, 3)),
-            new CCPawn    (this, TurnsSideType.Black, new Vector2I( 2, 3)),
-            new CCPawn    (this, TurnsSideType.Black, new Vector2I( 4, 3)),
-        ]);
-
-        ArrayList redPart = InitOnePartPieces(TurnsSideType.Red, [
-            new CCChariot (this, TurnsSideType.Red, new Vector2I( 4, 0)),
-            new CCHorse   (this, TurnsSideType.Red, new Vector2I( 3, 0)),
-            new CCElephant(this, TurnsSideType.Red, new Vector2I( 2, 0)),
-            new CCAdvisor (this, TurnsSideType.Red, new Vector2I( 1, 0)),
-            new CCGeneral (this, TurnsSideType.Red, new Vector2I( 0, 0)),
-            new CCAdvisor (this, TurnsSideType.Red, new Vector2I(-1, 0)),
-            new CCElephant(this, TurnsSideType.Red, new Vector2I(-2, 0)),
-            new CCHorse   (this, TurnsSideType.Red, new Vector2I(-3, 0)),
-            new CCChariot (this, TurnsSideType.Red, new Vector2I(-4, 0)),
-            new CCCannon  (this, TurnsSideType.Red, new Vector2I( 3, 2)),
-            new CCCannon  (this, TurnsSideType.Red, new Vector2I(-3, 2)),
-            new CCPawn    (this, TurnsSideType.Red, new Vector2I(-4, 3)),
-            new CCPawn    (this, TurnsSideType.Red, new Vector2I(-2, 3)),
-            new CCPawn    (this, TurnsSideType.Red, new Vector2I( 0, 3)),
-            new CCPawn    (this, TurnsSideType.Red, new Vector2I( 2, 3)),
-            new CCPawn    (this, TurnsSideType.Red, new Vector2I( 4, 3)),
-        ]);
-
-        return (blackPart, redPart);
-    }
-
-    private ArrayList InitOnePartPieces(TurnsSideType side, CCPiece[] pieces) {
-        ArrayList list = [];
-        foreach (var piece in pieces) {
-            list.Add(piece);
-            InsertPiece(piece, piece.Pos);
-        }
-        return list;
-    }
-}

Scripts/Src/ChineseChess/CCMain.cs

@@ -1,117 +0,0 @@
-using Vector2 = Vector.Vector2I;
-using System;
-using System.Collections;
-using static IBoard.IBoardOn;
-
-namespace ChineseChess;
-
-public class ChessCore {
-    public enum Mode {
-        SingleMode,
-        MultiMode,
-        DebugMode,
-    };
-
-    public enum TurnsSideType {
-        Red,
-        Black,
-    };
-
-    public enum PlayerSideType {
-        Self,
-        Opponent,
-        Any,
-    };
-
-    private TurnsSideType sideType = TurnsSideType.Red;
-    private readonly TurnsSideType selfSide;
-    public readonly CCBoard board;
-    private readonly Player playerSelf;
-    private readonly Player playerOpponent;
-    // public EventHandler<IBoard.MoveEventArgs> OnMove;
-    public ChessCore(Mode mode, TurnsSideType selfSide, ICCBoardOn? boardOn = null) {
-        this.selfSide = selfSide;
-        board = new(boardOn);
-
-        playerSelf = new(board, Player.PlayerType.Human);
-        playerOpponent = new(board, Player.PlayerType.Human);
-
-        void func(object? _self, MoveEventArgs record) {
-            // 防止 Undo 时 Selected Clear 出现 Null Pointer Exception
-            playerSelf.SelectedClear();
-            playerOpponent.SelectedClear();
-
-            // TODO FIXME it can be simple
-            if (record.From is null || record.To is null) {
-                return;
-            }
-
-            IPiece? from = record.From is not null ? board.GetPiece(record.From) : null;
-            IPiece? to = record.To is not null ? board.GetPiece(record.To) : null; 
-            board.AddRecord(from, to, record.From ?? new(), record.To ?? new());
-        }
-        playerSelf.OnMove += func;
-        playerOpponent.OnMove += func;
-        switch (mode) {
-            case Mode.SingleMode:
-                break;
-            case Mode.MultiMode:
-                break;
-            default:
-            case Mode.DebugMode:
-                throw new NotImplementedException();
-        }
-    }
-
-    public void Init() {
-        (ArrayList blackPart, ArrayList redPart) = board.InitGame();
-        if (selfSide == TurnsSideType.Red) {
-            playerSelf.SetAllowedPieces(redPart);
-            playerOpponent.SetAllowedPieces(blackPart);
-        } else {
-            playerSelf.SetAllowedPieces(blackPart);
-            playerOpponent.SetAllowedPieces(redPart);
-        }
-    }
-
-    public void OnPosClicked(Vector2 pos, PlayerSideType clickedSide = PlayerSideType.Any) {
-        if (GetTurnsType() == selfSide) {
-            playerSelf.CanMove = true;
-            playerOpponent.CanMove = false;
-        } else {
-            playerSelf.CanMove = false;
-            playerOpponent.CanMove = true;
-        }
-
-        switch (clickedSide) {
-            case PlayerSideType.Any:
-                playerSelf.HandleBoardPosClick(pos);
-                playerOpponent.HandleBoardPosClick(pos);
-                break;
-            case PlayerSideType.Self:
-                playerSelf.HandleBoardPosClick(pos);
-                break;
-            case PlayerSideType.Opponent:
-                playerOpponent.HandleBoardPosClick(pos);
-                break;
-        }
-    }
-
-    public TurnsSideType GetTurnsType() {
-        sideType = board.Steps % 2 == 0 ? TurnsSideType.Red : TurnsSideType.Black;
-        return sideType;
-    }
-
-    public void Undo() {
-		playerSelf.SelectedClear();
-        playerOpponent.SelectedClear();
-		board.UndoRecord();
-	}
-
-	public void ReInit() {
-        playerSelf.SelectedClear();
-        playerOpponent.SelectedClear();
-		board.Clear(true);
-        Init();
-	}
-}

Scripts/Src/ChineseChess/CCPiece.cs

@@ -1,85 +0,0 @@
-namespace ChineseChess;
-
-using System.Collections.Generic;
-using System.Linq;
-using Vector;
-using static ChineseChess.ChessCore;
-
-public class CCPiece : AbstractPiece {
-    public string CNName { get; protected set; } = "unknown";
-    public TurnsSideType TurnsSide { get; }
-    protected CCBoard board;
-    protected Vector2I localPos = new();
-
-    static readonly Trans2DI transRedGlobal2Local =
-        new(new Vector2I(1, 0), new Vector2I(0, -1), new Vector2I(-4, 9));
-    static readonly Trans2DI transBlackGlobal2Local =
-        new(new Vector2I(-1, 0), new Vector2I(0, 1), new Vector2I(4, 0));
-    public CCPiece(CCBoard? board = null, TurnsSideType turnsSide = TurnsSideType.Red,
-            string name = "", Vector2I? pos = null) : base(name) {
-        this.board = board ?? new();
-        TurnsSide = turnsSide;
-        Pos = pos is not null ? Local2Global(pos) : Vector2I.Zero;
-    }
-
-    public override Vector2I Pos {
-        get => base.Pos; set {
-            base.Pos = value;
-            localPos = Global2Local(Pos);
-        }
-    }
-
-    public override bool CanMove(Vector2I to) {
-        return CanMoveAllPos().Any(item => item == to);
-    }
-
-    protected Vector2I Local2Global(in Vector2I pos) {
-        return TurnsSide == TurnsSideType.Red ? (pos * transRedGlobal2Local) : (pos * transBlackGlobal2Local);
-    }
-
-    protected Vector2I Global2Local(in Vector2I pos) {
-        return TurnsSide == TurnsSideType.Red ? (transRedGlobal2Local * pos) : (transBlackGlobal2Local * pos);
-    }
-
-    protected CCPiece? GetCCPieceLocal(in Vector2I pos) {
-        return (CCPiece?)board.GetPiece(Local2Global(pos));
-    }
-
-    public virtual List<Vector2I> CanMoveAllPosSelf() {
-        return [];
-    }
-
-    public IEnumerable<Vector2I> CanMoveAllPosLocal() {
-        var self = CanMoveAllPosSelf().Select(item => item + localPos);
-        var ret = self.Where(item => {
-            CCPiece? piece = GetCCPieceLocal(item);
-            bool ret = piece is null || piece.TurnsSide != TurnsSide;
-            // Console.WriteLine($"{item} can move: {ret}");
-            return ret;
-        });
-
-        // Console.WriteLine("localPos: {0}", localPos);
-        // Console.WriteLine("CanMoveAllPosSelf: {0}", string.Join(",", self));
-        // Console.WriteLine("CanMoveAllPosLocal: {0}", string.Join(",", ret));
-        return ret;
-    }
-
-    public IEnumerable<Vector2I> CanMoveAllPos() {
-        var ret = CanMoveAllPosLocal()
-            .Select(item => Local2Global(item));
-        // Console.WriteLine("CanMoveAllPos: {0}", string.Join(",", ret));
-        return ret;
-    }
-
-    protected bool IsPosOutOfRangeLocal(Vector2I pos) {
-        return board.IsPosOutOfRange(Local2Global(pos));
-    }
-
-    protected CCPiece? GetRecursivePieceLocal(Vector2I origin, Vector2I pos) {
-        Vector2I with = origin + pos;
-        while (!IsPosOutOfRangeLocal(with) && GetCCPieceLocal(with) == null) {
-            with += pos;
-        }
-        return GetCCPieceLocal(with);
-    }
-}

Scripts/Src/ChineseChess/CCPlayer.cs

@@ -1,122 +0,0 @@
-using System;
-using System.Collections;
-using Vector2I = Vector.Vector2I;
-
-namespace ChineseChess;
-using static IBoard.IBoardOn;
-public class Player {
-	private readonly CCBoard board;
-	private readonly SelectedPiece selectedNode;
-	
-	public EventHandler<MoveEventArgs>? OnMove;
-	public bool CanMove { get; set; } = true;
-
-	public enum PlayerType {
-		Human,
-		AI
-	}
-
-	public Player(CCBoard board, PlayerType type = PlayerType.Human) {
-		this.board = board;
-		this.selectedNode = new SelectedPiece(board);
-	}
-
-	public void HandleBoardPosClick(Vector2I clickPos) {
-		if (board.IsPosOutOfRange(clickPos)) return;
-		// Console.WriteLine($"VirtualBoard {clickPos} clicked");
-		IPiece? clickChess = board.GetPiece(clickPos);
-
-		if (!selectedNode.HasSelected()) {
-			// Select piece
-			if (clickChess == null) {
-				// selectedNode.Clear();
-				return;
-			}
-			selectedNode.SetPos(clickPos);
-		} else if (clickChess == selectedNode.GetPiece()) {
-			// Unselect piece
-			selectedNode.Clear();
-		} else {
-			// Move piece
-			// GD.Print("default MoveFunc Move: ", selectedNode.GetPos(), "->", clickPos);
-			if (CanMove) MoveAndRecord(clickPos, selectedNode.GetPos());
-		}
-	}
-
-	public void MoveAndRecord(Vector2I toPos, Vector2I fromPos) {
-		// GD.Print($"{fromPos} move to {toPos}");
-		IPiece? toChess = board.GetPiece(toPos);
-        IPiece? fromChess = board.GetPiece(fromPos);
-		if (fromChess != null) fromChess.IsSelected = false;
-		else return;
-		
-		selectedNode.Clear();
-		if (!fromChess.CanMove(toPos)) {
-			return;
-		}
-
-		// MUST BE THERE !!! 防止删除节点后在启动回调导致错误
-		OnMove?.Invoke(this, new MoveEventArgs
-			(fromChess, fromPos, toPos));
-	
-        if (toChess != null) {
-            board.RemovePiece(toPos);
-        }
-        board.MovePiece(fromPos, toPos);
-
-		selectedNode.Clear();
-	}
-
-	public void SelectedClear() {
-		selectedNode.Clear();
-	}
-
-	public void SetAllowedPieces(ArrayList allowedPieces) {
-		selectedNode.allowedPieces = allowedPieces;
-	}
-
-	private class SelectedPiece {
-		// Called when the node enters the scene tree for the first time.
-		private Vector2I selectedNodePos = Vector2I.MaxValue;
-		private IPiece? piece = null;
-		private readonly CCBoard board;
-		public ArrayList? allowedPieces = null;
-
-		public SelectedPiece(CCBoard board) {
-			this.board = board;
-		}
-
-		public void Clear() {
-			if (selectedNodePos != Vector2I.MaxValue) {
-				selectedNodePos = Vector2I.MaxValue;
-				if (piece != null)
-					piece.IsSelected = false;
-			}
-			// Console.WriteLine("SelectedPiece.Clear {0}", piece);
-		}
-
-		public void SetPos(Vector2I pos) {
-			piece = board.GetPiece(pos);
-			if (allowedPieces != null && allowedPieces.Contains(piece) == false) {
-				return;
-			}
-			selectedNodePos = pos;
-			if (piece == null)
-				return;
-			piece.IsSelected = true;
-			Console.WriteLine("SelectedPiece.SetPos {0}", piece);
-		}
-
-		public IPiece? GetPiece() {
-			return piece;
-		}
-
-		public Vector2I GetPos() {
-			return selectedNodePos;
-		}
-
-		public bool HasSelected() {
-			return selectedNodePos != Vector2I.MaxValue;
-		}
-	}
-}

Scripts/Src/ChineseChess/CCTypes.cs

@@ -1,246 +0,0 @@
-using System.Collections.Generic;
-using static ChineseChess.ChessCore;
-using Vector2I = Vector.Vector2I;
-
-namespace ChineseChess;
-public class CCGeneral : CCPiece {
-    public CCGeneral(CCBoard board, TurnsSideType turnsSide = TurnsSideType.Red, Vector2I? pos = null)
-    : base(board, turnsSide, name : "General", pos) {
-        if (turnsSide == TurnsSideType.Red) {
-            CNName = "帅";
-        } else {
-            CNName = "将";
-        }
-    }
-
-    public override List<Vector2I> CanMoveAllPosSelf() {
-        List<Vector2I> list = new() {
-            new(1, 0),
-            new(-1, 0),
-            new(0, 1),
-            new(0, -1),
-        };
-
-        // 移除不符合条件的元素
-        list.RemoveAll(item =>
-            localPos.X + item.X > 1 || localPos.X + item.X < -1 ||
-            localPos.Y + item.Y > 2 || localPos.Y + item.Y < 0
-            || GetRecursivePieceLocal(localPos + item, new(0, 1)) is CCGeneral);
-        return list;
-    }
-}
-
-public class CCAdvisor : CCPiece {
-    public CCAdvisor(CCBoard board, TurnsSideType turnsSide = TurnsSideType.Red, Vector2I? pos = null)
-    : base(board, turnsSide, name : "Advisor", pos) {
-        if (turnsSide == TurnsSideType.Red) {
-            CNName = "仕";
-        } else {
-            CNName = "士";
-        }
-    }
-
-    public override List<Vector2I> CanMoveAllPosSelf() {
-        List<Vector2I> list = new() {
-            new(1, 1),
-            new(-1, 1),
-            new(1, -1),
-            new(-1, -1),
-        };
-
-        // 移除不符合条件的元素
-        list.RemoveAll(item =>
-            localPos.X + item.X > 1 || localPos.X + item.X < -1 ||
-            localPos.Y + item.Y > 2 || localPos.Y + item.Y < 0);
-
-        return list;
-    }
-}
-
-public class CCElephant : CCPiece {
-    public CCElephant(CCBoard board, TurnsSideType turnsSide = TurnsSideType.Red, Vector2I? pos = null)
-    : base(board, turnsSide, name : "Bishop", pos) {
-        if (turnsSide == TurnsSideType.Red) {
-            CNName = "相";
-        } else {
-            CNName = "象";
-        }
-    }
-
-    public override List<Vector2I> CanMoveAllPosSelf() {
-        List<Vector2I> list = new() {
-            new(2, 2),
-            new(-2, 2),
-            new(2, -2),
-            new(-2, -2),
-        };
-
-        list.RemoveAll(item => IsPosOutOfRangeLocal(localPos + item));
-        // 移除不符合条件的元素
-        list.RemoveAll(item => localPos.Y + item.Y < 0 || localPos.Y + item.Y > 4 ||
-            GetCCPieceLocal(new(localPos.X + item.X / 2, localPos.Y + item.Y / 2)) is not null);
-
-        return list;
-    }
-}
-
-public class CCHorse : CCPiece {
-    public CCHorse(CCBoard board, TurnsSideType turnsSide = TurnsSideType.Red, Vector2I? pos = null)
-    : base(board, turnsSide, name : "Horse", pos) {
-        if (turnsSide == TurnsSideType.Red) {
-            CNName = "馬";
-        } else {
-            CNName = "马";
-        }
-    }
-
-    public override List<Vector2I> CanMoveAllPosSelf() {
-        List<Vector2I> list = new () {
-            new Vector2I(1, 2),
-            new Vector2I(1, -2),
-            new Vector2I(2, 1),
-            new Vector2I(2, -1),
-            new Vector2I(-1, -2),
-            new Vector2I(-1, 2),
-            new Vector2I(-2, -1),
-            new Vector2I(-2, 1),
-        };
-
-        list.RemoveAll(item => IsPosOutOfRangeLocal(localPos + item));
-        list.RemoveAll(item => {
-            Vector2I pos = new(localPos);
-            if (item.X == 2) {
-                pos.X += 1;
-            } else if (item.X == -2) {
-                pos.X -= 1;
-            } else if (item.Y == 2) {
-                pos.Y += 1;
-            } else if (item.Y == -2) {
-                pos.Y -= 1;
-            }
-            return GetCCPieceLocal(pos) is not null;
-        });
-        return list;
-    }
-}
-
-public class CCChariot : CCPiece {
-    public CCChariot(CCBoard board, TurnsSideType turnsSide = TurnsSideType.Red, Vector2I? pos = null)
-    : base(board, turnsSide, name : "Chariot", pos) {
-        if (turnsSide == TurnsSideType.Red) {
-            CNName = "車";
-        } else {
-            CNName = "车";
-        }
-    }
-
-    public override List<Vector2I> CanMoveAllPosSelf() {
-        List<Vector2I> list = new ();
-
-        void func(Vector2I added) {
-            Vector2I ptr = new(localPos);
-            while (true) {
-                ptr += added;
-                if (IsPosOutOfRangeLocal(ptr)) {
-                    break;
-                }
-                if (GetCCPieceLocal(ptr) != null) {
-                    list.Add(ptr - localPos);
-                    break;
-                }
-                list.Add(ptr - localPos);
-            }
-        }
-
-        func(Vector2I.Up);
-        func(Vector2I.Down);
-        func(Vector2I.Left);
-        func(Vector2I.Right);
-        return list;
-    }
-}
-
-public class CCCannon : CCPiece {
-    public CCCannon(CCBoard board, TurnsSideType turnsSide = TurnsSideType.Red, Vector2I? pos = null)
-    : base(board, turnsSide, name : "Cannon", pos) {
-        if (turnsSide == TurnsSideType.Red) {
-            CNName = "砲";
-        } else {
-            CNName = "炮";
-        }
-    }
-
-    public override List<Vector2I> CanMoveAllPosSelf() {
-        List<Vector2I> list = new ();
-
-        void func(Vector2I added) {
-            Vector2I ptr = new(localPos);
-            bool flag = true;
-            while (true) {
-                ptr += added;
-                if (IsPosOutOfRangeLocal(ptr)) {
-                    break;
-                }
-                if (GetCCPieceLocal(ptr) != null) {
-                    if (flag) {
-                        flag = false;
-                    } else {
-                        list.Add(ptr - localPos);
-                        break;
-                    }
-                }
-                if (flag) list.Add(ptr - localPos);
-            }
-        }
-
-        func(Vector2I.Up);
-        func(Vector2I.Down);
-        func(Vector2I.Left);
-        func(Vector2I.Right);
-        return list;
-    }
-}
-
-public class CCPawn : CCPiece {
-    public CCPawn(CCBoard board, TurnsSideType turnsSide = TurnsSideType.Red, Vector2I? pos = null)
-    : base(board, turnsSide, name : "Pawn", pos) {
-        if (turnsSide == TurnsSideType.Red) {
-            CNName = "兵";
-        } else {
-            CNName = "卒";
-       }
-    }
-
-    public override List<Vector2I> CanMoveAllPosSelf() {
-        List<Vector2I> list = new () {
-            new(0, 1),
-            new(1, 0),
-            new(-1, 0),
-        };
-
-        list.RemoveAll(item => IsPosOutOfRangeLocal(localPos + item));
-        list.RemoveAll(item => localPos.Y <= 4 && item != new Vector2I(0, 1));
-        return list;
-    }
-}
-
-// 帅/将 (General) - 代表双方的最高统帅。
-// 子类名：ChessGeneral
-
-// 仕/士 (Advisor) - 保护帅/将的近身侍卫。
-// 子类名：ChessAdvisor
-
-// 相/象 (Elephant) - 行动受限，走田字格，不能过河。
-// 子类名：ChessElephant
-
-// 車/车 (Chariot) - 横竖移动，威力巨大。
-// 子类名：ChessChariot
-
-// 馬/马 (Horse) - 走日字形，跳跃式移动。
-// 子类名：ChessHorse
-
-// 砲/炮 (Cannon) - 需要隔子才能吃子，直线移动。
-// 子类名：ChessCannon
-
-// 兵/卒 (Pawn) - 最基础的棋子，过河后可横移。
-// 子类名：ChessPawn

Scripts/Src/ChineseChess/ChessTypes.cs

@@ -0,0 +1,20 @@
+// 帅/将 (General) - 代表双方的最高统帅。
+// 子类名：ChessGeneral
+
+// 仕/士 (Advisor) - 保护帅/将的近身侍卫。
+// 子类名：ChessAdvisor
+
+// 相/象 (Elephant) - 行动受限，走田字格，不能过河。
+// 子类名：ChessElephant
+
+// 車/车 (Chariot) - 横竖移动，威力巨大。
+// 子类名：ChessChariot
+
+// 馬/马 (Horse) - 走日字形，跳跃式移动。
+// 子类名：ChessHorse
+
+// 砲/炮 (Cannon) - 需要隔子才能吃子，直线移动。
+// 子类名：ChessCannon
+
+// 兵/卒 (Pawn) - 最基础的棋子，过河后可横移。
+// 子类名：ChessPawn

Scripts/Src/ChineseChess/Player.cs

@@ -0,0 +1,133 @@
+using Vector2 = Godot.Vector2;
+using System;
+using System.Collections;
+
+public class Player {
+	private readonly VirtualBoard board;
+	private readonly SelectedPiece selectedNode;
+	private readonly MoveRecords<VirtualPiece> moveRecords;
+	public EventHandler<VirtualBoard.MoveEventArgs> OnMove;
+	
+
+	public enum PlayerType {
+		Human,
+		AI
+	}
+
+	public Player(VirtualBoard board, PlayerType type = PlayerType.Human)
+	{
+		this.board = board;
+		this.selectedNode = new SelectedPiece(board);
+		this.moveRecords = new MoveRecords<VirtualPiece>(onUndoRecordCallback: (newNode, oldNode, newPos, oldPos) => {
+			// GD.Print("Undo: ", newNode, "->", oldNode, ":", newPos, "->", oldPos);
+			VirtualPiece newPiece = newNode;
+			VirtualPiece oldPiece = oldNode;
+			this.board.MovePiece(newPos, oldPos);
+			if (newPiece != null) {
+				this.board.InsertPiece(newPiece, newPos);
+			}
+		});
+	}
+
+	public void HandleBoardPosClick(Vector2 clickPos) {
+		if (board.ArrPosOutOfRange(clickPos)) return;
+		// GD.Print($"VirtualBoard {clickPos} clicked");
+		VirtualPiece clickChess = board.GetPiece(clickPos);
+
+		if (!selectedNode.HasSelected()) {
+			// Select piece
+			if (clickChess == null) {
+				// selectedNode.Clear();
+				return;
+			}
+			selectedNode.SetPos(clickPos);
+		} else if (clickChess == selectedNode.GetPiece()) {
+			// Unselect piece
+			selectedNode.Clear();
+		} else {
+			// Move piece
+			// GD.Print("default MoveFunc Move: ", selectedNode.GetPos(), "->", clickPos);
+			MoveAndRecord(clickPos, selectedNode.GetPos());
+		}
+	}
+
+	public void MoveAndRecord(Vector2 toPos, Vector2 fromPos) {
+		// GD.Print($"{fromPos} move to {toPos}");
+		VirtualPiece toChess = board.GetPiece(toPos);
+        VirtualPiece fromChess = board.GetPiece(fromPos);
+		fromChess?.Selected(false);
+
+		VirtualPiece NowNode;
+        if (toChess != null) {
+			NowNode = toChess;
+            board.RemovePiece(toPos);
+        } else {
+			NowNode = toChess;
+		}
+		moveRecords.AddRecord(NowNode, fromChess, toPos, fromPos);
+
+		OnMove?.Invoke(this, new VirtualBoard.MoveEventArgs { From = fromPos, To = toPos });
+        board.MovePiece(fromPos, toPos);
+
+		selectedNode.Clear();
+	}
+
+	public void Undo() {
+		// ChessPiece selected = selectedNode.GetPiece();
+		// selected?.DeSelected();
+		selectedNode.Clear();
+		moveRecords.Undo();
+	}
+
+	public void ReInit() {
+		moveRecords.Clear();
+		board.Clear();
+		selectedNode.Clear();
+		// board.InitChessBoard();
+	}
+
+	public void SetAllowedPieces(ArrayList allowedPieces) {
+		selectedNode.allowedPieces = allowedPieces;
+	}
+
+	private class SelectedPiece {
+		// Called when the node enters the scene tree for the first time.
+		private Vector2 selectedNodePos = Vector2.Inf;
+		private VirtualPiece piece;
+		private readonly VirtualBoard board;
+		public ArrayList allowedPieces = null;
+
+		public SelectedPiece(VirtualBoard board) {
+			this.board = board;
+		}
+
+		public void Clear() {
+			if (selectedNodePos != Vector2.Inf) {
+				selectedNodePos = Vector2.Inf;
+				piece.Selected(false);
+			}
+		}
+
+		public void SetPos(Vector2 pos) {
+			// piece = board.GetNodeFromBoard(pos) as VirtualPiece;
+			piece = board.GetPiece(pos);
+			if (allowedPieces != null && allowedPieces.Contains(piece) == false) {
+				return;
+			}
+			selectedNodePos = pos;
+			piece.Selected(true);
+		}
+
+		public VirtualPiece GetPiece() {
+			return piece;
+		}
+
+		public Vector2 GetPos() {
+			return selectedNodePos;
+		}
+
+		public bool HasSelected() {
+			return selectedNodePos != Vector2.Inf;
+		}
+	}
+}

Scripts/Src/IBoard.cs

@@ -1,33 +0,0 @@
-using System;
-using Godot;
-using Vector2I = Vector.Vector2I;
-
-
-public interface IBoard {
-    public interface IBoardOn {
-        void OnInsert(object self, IPiece piece) {}
-        void OnRemove(object self, IPiece piece) {}
-        void OnMove(object self, MoveEventArgs args) {}
-
-        void OnAddRecord(object self, MoveRecord record) {}
-        void OnUndoRecord(object self, MoveRecord record) {}
-        void OnSetPieceInteral(object self, SetPieceEventArgs args) {}
-        record SetPieceEventArgs(IPiece? OldPiece, IPiece? NewPiece, Vector2I Pos);
-        record MoveEventArgs(IPiece? Piece, Vector2I From, Vector2I To);
-    }
-
-    public IBoardOn? On { get; protected set; }
-    public int Rows { get; }
-    public int Cols { get; }
-
-    bool IsPosOutOfRange(Vector2I pos);
-    IPiece? GetPiece(Vector2I pos);
-    IPiece? SetPiece(IPiece? piece, Vector2I pos);
-    bool InsertPiece(IPiece piece, Vector2I pos);
-    bool MovePiece(Vector2I from, Vector2I to);
-    IPiece? RemovePiece(Vector2I pos);
-    void Clear(bool clearRecords);
-    void AddRecord(IPiece? From, IPiece? To, Vector2I FromPos, Vector2I ToPos);
-    void UndoRecord();
-    record MoveRecord(IPiece? From, IPiece? To, Vector2I FromPos, Vector2I ToPos);
-}

Scripts/Src/IPiece.cs

@@ -1,22 +0,0 @@
-using System;
-using System.Collections.Generic;
-using Vector2I = Vector.Vector2I;
-
-
-public interface IPiece {
-    public interface IPieceOn {
-        void OnPos(object self, Vector2I oldPos) {}
-        void OnMove(object self, Vector2I oldPos) {}
-        void OnSelected(object self, bool oldIsSelected) {}
-        void OnName(object self, string oldName) {}
-    }
-
-    IPieceOn? On { get; protected set; }
-    Vector2I Pos { get; set; }
-    string Name { get; set; }
-    bool IsSelected { get; set; }
-    Dictionary<string, object> Data { get; set; }
-
-    bool CanMove(Vector2I to);
-    bool Move(Vector2I pos);
-}

Scripts/Src/Vector.cs

@@ -1,133 +0,0 @@
-using System.Diagnostics;
-
-namespace Vector;
-
-public class Vector2I {
-    public Vector2I() {
-        X = 0;
-        Y = 0;
-    }
-
-    public Vector2I(int x, int y) {
-        X = x;
-        Y = y;
-    }
-
-    public Vector2I(Vector2I other) {
-        X = other.X;
-        Y = other.Y;
-    }
-
-    public int X { get; set; }
-    public int Y { get; set; }
-
-    public static bool operator ==(Vector2I a, Vector2I b) {
-        return a?.X == b?.X && a?.Y == b?.Y;
-    }
-    
-    public static bool operator !=(Vector2I a, Vector2I b) {
-        return !(a == b);
-    }
-
-    public static Vector2I operator +(Vector2I left, Vector2I right) {
-        return new (
-            left.X + right.X,
-            left.Y + right.Y);
-    }
-
-    public static Vector2I operator -(Vector2I left, Vector2I right) {
-        return new (
-            left.X - right.X,
-            left.Y - right.Y);
-    }
-
-    public static Vector2I operator *(Vector2I left, Vector2I right) {
-        return new (
-            left.X * right.X,
-            left.Y * right.Y);
-    }
-
-    public int Dot(Vector2I with) {
-        return X * with.X + Y * with.Y;
-    }
-
-    public override bool Equals(object? obj) {
-        if (obj is Vector2I other) {
-            return this == other;
-        }
-        return false;
-    }
-
-    public override int GetHashCode() {
-        return System.HashCode.Combine(X, Y);
-    }
-
-    public static readonly Vector2I MaxValue = new(int.MaxValue, int.MinValue);
-    public static readonly Vector2I MinValue = new (int.MinValue, int.MaxValue);
-    public static readonly Vector2I Zero = new(0, 0);
-    
-    public static readonly Vector2I Up = new(0, 1);
-    public static readonly Vector2I Down = new(0, -1);
-    public static readonly Vector2I Left = new(-1, 0);
-    public static readonly Vector2I Right = new(1, 0);
-
-    public override string ToString() {
-        return $"({X},{Y})";
-    }
-}
-
-public class Trans2DI {
-    public Vector2I XAxis { get; set; } // x axis , first column
-    public Vector2I YAxis { get; set; } // y axis , second column
-    public Vector2I Origin { get; set; } // origin point
-    public Trans2DI() {
-        XAxis = new Vector2I(1, 0);
-        YAxis = new Vector2I(0, 1);
-        Origin = new Vector2I(0, 0);
-    }
-
-    public Trans2DI(Vector2I xAxis, Vector2I yAxis, Vector2I origin) {
-        XAxis = xAxis;
-        YAxis = yAxis;
-        Origin = origin;
-    }
-
-    public Trans2DI(Trans2DI other) {
-        XAxis = other.XAxis;
-        YAxis = other.YAxis;
-        Origin = other.Origin;
-    }
-
-    public Trans2DI(int xx, int xy, int yx, int yy, int ox, int oy) {
-        XAxis = new Vector2I(xx, xy);
-        YAxis = new Vector2I(yx, yy);
-        Origin = new Vector2I(ox, oy);
-    }
-
-    public static Trans2DI Identity => new();
-
-    /**
-     * X.x Y.x  *  v.x  +  O.x  =  X.x * v.x + Y.x * v.y  +  O.x
-     * X.y Y.y     v.y     O.y     X.y * v.x + Y.y * v.y  +  O.y
-     */
-    public static Vector2I operator *(in Trans2DI trans, in Vector2I vec) {
-        return new Vector2I(
-            trans.XAxis.X * vec.X + trans.XAxis.Y * vec.Y,
-            trans.YAxis.X * vec.X + trans.YAxis.Y * vec.Y) + trans.Origin;
-    }
-
-    public static Vector2I operator *(in Vector2I vec, in Trans2DI trans) {
-        Vector2I with = vec - trans.Origin;
-        return new Vector2I(
-            trans.XAxis.X * with.X + trans.XAxis.Y * with.Y,
-            trans.YAxis.X * with.X + trans.YAxis.Y * with.Y);
-    }
-
-    public static Trans2DI operator *(Trans2DI a, Trans2DI b) {
-        return new Trans2DI();
-    }
-
-    public override string ToString() {
-        return $"[{XAxis}, {YAxis}, {Origin}]";
-    }
-}

Scripts/Src/VirtualBoard.cs

@@ -0,0 +1,99 @@
+using System;
+using Vector2 = Godot.Vector2;
+
+public class VirtualBoard {
+    private readonly int Rows;
+    private readonly int Cols;
+    private readonly VirtualPiece[,] pieces;
+
+    public class SetPiecePosEventArgs : EventArgs
+    {
+        public VirtualPiece OldPiece { get; set; }
+        public VirtualPiece NewPiece { get; set; }
+    }
+
+    public class MoveEventArgs : EventArgs
+    {
+        public Vector2 From { get; set; }
+        public Vector2 To { get; set; }
+    }
+
+    public event EventHandler<SetPiecePosEventArgs> OnSetPiecePos;
+    public event EventHandler<VirtualPiece> OnInsert;
+    public event EventHandler<VirtualPiece> OnRemove;
+    public event EventHandler<MoveEventArgs> OnMove;
+
+    public VirtualBoard(int rows, int cols) {
+        this.Rows = rows;
+        this.Cols = cols;
+        pieces = new VirtualPiece[rows, cols];
+    }
+
+    public bool ArrPosOutOfRange(Vector2 arrayPos) {
+        return arrayPos.X < 0 || arrayPos.X >= Rows || arrayPos.Y < 0 || arrayPos.Y >= Cols;
+    }
+
+    public VirtualPiece GetPiece(Vector2 arrayPos) {
+        if (ArrPosOutOfRange(arrayPos)) return null;
+        return pieces[(int)arrayPos.X, (int)arrayPos.Y];
+    }
+
+    public VirtualPiece SetPiecePos(VirtualPiece piece, Vector2 arrayPos) {
+        if (ArrPosOutOfRange(arrayPos)) return null;
+
+        VirtualPiece oldPiece = pieces[(int)arrayPos.X, (int)arrayPos.Y];
+        pieces[(int)arrayPos.X, (int)arrayPos.Y] = piece;
+
+        OnSetPiecePos?.Invoke(this, new SetPiecePosEventArgs { OldPiece = oldPiece, NewPiece = piece });
+
+        piece?.Move(arrayPos);
+
+        return oldPiece;
+    }
+
+    public bool InsertPiece(VirtualPiece piece, Vector2 arrayPos) {
+        if (GetPiece(arrayPos) != null) {
+            return false;
+        }
+
+        OnInsert?.Invoke(this, piece);
+        SetPiecePos(piece, arrayPos);
+
+        return true;
+    }
+
+    public bool MovePiece(Vector2 from, Vector2 to) {
+        if (ArrPosOutOfRange(to) || ArrPosOutOfRange(from)) {
+            return false;
+        }
+
+        if (GetPiece(to) != null) {
+            return false;
+        }
+
+        OnMove?.Invoke(this, new MoveEventArgs { From = from, To = to });
+
+        SetPiecePos(SetPiecePos(null, from), to);
+
+        return true;
+    }
+
+    public bool RemovePiece(Vector2 pos) {
+        VirtualPiece piece = GetPiece(pos);
+        if (piece == null) {
+            return false;
+        }
+
+        OnRemove?.Invoke(this, piece);
+
+        return SetPiecePos(null, pos) != null;
+    }
+
+    public void Clear() {
+        for (int i = 0; i < Rows; i++) {
+            for (int j = 0; j < Cols; j++) {
+                RemovePiece(new Vector2(i, j));
+            }
+        }
+    }
+}

Scripts/Src/VirtualPiece.cs

@@ -0,0 +1,38 @@
+using Vector2 = Godot.Vector2;
+using System;
+
+public class VirtualPiece  {
+    private Vector2 pos; // 注意这个坐标的非像素坐标而是棋盘坐标
+    
+    private readonly string name;
+    private bool isSelected;
+    public object data;
+
+    public event Action<Vector2> OnMove;
+    public event Action<bool> OnSelected;
+
+    public void Move(Vector2 pos) {
+        this.pos = pos;
+        OnMove?.Invoke(pos);
+    }
+
+    public Vector2 Pos() {
+        return pos;
+    }
+
+    public void Selected(bool isSelected) {
+        if (this.isSelected != isSelected) {
+            OnSelected?.Invoke(isSelected);
+            this.isSelected = isSelected;
+        }
+    }
+
+    public bool IsSelected() {
+        return isSelected;
+    }
+
+    public VirtualPiece(string name = "", Vector2 pos = new Vector2()) {
+        this.name = name;
+        this.pos = pos;
+    }
+}

Scripts/Utilities/MoveRecords.cs

@@ -0,0 +1,59 @@
+// using System.Numerics;
+using Godot;
+
+using System.Collections.Generic;
+using System;
+
+public class MoveRecords<T> {
+    private readonly LinkedList<MoveRecord> records = new LinkedList<MoveRecord>(); // 使用队列替换栈
+    private readonly int maxRecords; // 记录上限
+    private readonly Action<T, T, Vector2, Vector2> onAddRecordCallback; // 添加记录时的回调
+    private readonly Action<T, T, Vector2, Vector2> onUndoRecordCallback; // 撤销记录时的回调
+    
+    public MoveRecords(
+    Action<T, T, Vector2, Vector2> onAddRecordCallback = null,
+    Action<T, T, Vector2, Vector2> onUndoRecordCallback = null,
+    int maxRecords = 32) {
+        this.maxRecords = maxRecords;
+        this.onAddRecordCallback = onAddRecordCallback;
+        this.onUndoRecordCallback = onUndoRecordCallback;
+    }
+
+    public void AddRecord(T newNode, T oldNode, Vector2 newPos, Vector2 oldPos) {
+        // 达到记录上限时，移除最远的记录（队首元素）
+        if (records.Count >= maxRecords) {
+            records.RemoveFirst();
+        }
+        var record = new MoveRecord(newNode, oldNode, newPos, oldPos);
+        // 触发添加记录的回调
+        onAddRecordCallback?.Invoke(newNode, oldNode, newPos, oldPos);
+        // GD.Print("In func Addrecord: ", record.NewNode, "->", record.OldNode, ":", record.NewPos, "->", record.OldPos);
+        records.AddLast(record); // 将新记录加入队尾
+    }
+
+    public void Undo() {
+        if (records.Count == 0) return;
+        MoveRecord record = records.Last.Value; // 移除并获取队首的记录以执行撤销操作
+        records.RemoveLast();
+        // 触发撤销记录的回调
+        onUndoRecordCallback?.Invoke(record.NewNode, record.OldNode, record.NewPos, record.OldPos);
+    }
+
+    public void Clear() {
+        records.Clear();
+    }
+
+    private class MoveRecord {
+        public T NewNode { get; }
+        public T OldNode { get; }
+        public Vector2 NewPos { get; }
+        public Vector2 OldPos { get; }
+
+        public MoveRecord(T newNode, T oldNode, Vector2 newPos, Vector2 oldPos) {
+            NewNode = newNode;
+            OldNode = oldNode;
+            OldPos = oldPos;
+            NewPos = newPos;
+        }
+    }
+}

Scripts/Utilities/Transforms.cs

@@ -0,0 +1,10 @@
+using Godot;
+
+public static class PosTrans {
+    private static readonly int pixGripSize = 32;
+	public static Transform2D transArrToPix = new(
+		new Vector2(pixGripSize, 0),
+		new Vector2(0, pixGripSize),
+		new Vector2(-4, -4.5f) * pixGripSize
+	);
+}

Test/Test.csproj

@@ -1,31 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
-
-    <IsPackable>false</IsPackable>
-    <IsTestProject>true</IsTestProject>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="coverlet.collector" Version="6.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
-    <PackageReference Include="NUnit" Version="3.14.0" />
-    <PackageReference Include="NUnit.Analyzers" Version="3.9.0" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <Using Include="NUnit.Framework" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\*.csproj" />
-  </ItemGroup>
-  <!-- <ItemGroup>
-    <Compile Include="..\Scripts\Src\*.cs" />
-  </ItemGroup> -->
-
-</Project>

Test/UnitTest1.cs

@@ -1,16 +0,0 @@
-using Vector;
-
-namespace Test;
-public class Tests
-{
-    [SetUp]
-    public void Setup()
-    {
-    }
-
-    [Test]
-    public void Test1()
-    {
-        Assert.Pass();
-    }
-}

Test/src/TestVector.cs

@@ -1,263 +0,0 @@
-using Vector;
-namespace Test.Vector;
-public class TestsVector2I {
-    [SetUp]
-    public void Setup() {
-    }
-
-    [Test]
-    public void TestVector2I_Constructors() {
-        // Arrange & Act
-        var v1 = new Vector2I();
-        var v2 = new Vector2I(1, 2);
-        var v3 = new Vector2I(v2);
-
-        // Assert
-        Assert.Multiple(() => {
-            Assert.That(v1.X, Is.EqualTo(0));
-            Assert.That(v1.Y, Is.EqualTo(0));
-            Assert.That(v2.X, Is.EqualTo(1));
-            Assert.That(v2.Y, Is.EqualTo(2));
-            Assert.That(v3.X, Is.EqualTo(1));
-            Assert.That(v3.Y, Is.EqualTo(2));
-        });
-    }
-
-    [Test]
-    public void TestVector2I_Operators() {
-        // Arrange
-        var v1 = new Vector2I(1, 2);
-        var v2 = new Vector2I(3, 4);
-
-        // Act
-        var v3 = v1 + v2;
-        var v4 = v1 - v2;
-        var v5 = v1 * v2;
-
-        // Assert
-        Assert.Multiple(() => {
-            Assert.That(v3, Is.EqualTo(new Vector2I(4, 6)));
-            Assert.That(v4, Is.EqualTo(new Vector2I(-2, -2)));
-            Assert.That(v5, Is.EqualTo(new Vector2I(3, 8)));
-        });
-    }
-
-    [Test]
-    public void TestVector2I_DotProduct() {
-        // Arrange
-        var v1 = new Vector2I(1, 2);
-        var v2 = new Vector2I(3, 4);
-
-        // Act
-        var dotProduct = v1.Dot(v2);
-
-        // Assert
-        Assert.That(dotProduct, Is.EqualTo(11));
-    }
-
-    [Test]
-    public void TestVector2I_ParameterModification() {
-        // Arrange
-        var v1 = new Vector2I(1, 2);
-        var v2 = new Vector2I(3, 4);
-
-        // Act
-        var v3 = v1 + v2;
-        var v4 = v1 - v2;
-        var v5 = v1 * v2;
-
-        // Assert
-        Assert.Multiple(() => {
-            Assert.That(v1, Is.EqualTo(new Vector2I(1, 2)), "v1 should not be modified");
-            Assert.That(v2, Is.EqualTo(new Vector2I(3, 4)), "v2 should not be modified");
-        });
-    }
-
-    [Test]
-    public void TestVector2I_Equality() {
-        // Arrange
-        var v1 = new Vector2I(1, 2);
-        var v2 = new Vector2I(1, 2);
-        var v3 = new Vector2I(3, 4);
-
-        // Act & Assert
-        Assert.Multiple(() => {
-            Assert.That(v1, Is.EqualTo(v2));
-            Assert.That(v1, Is.Not.EqualTo(v3));
-        });
-    }
-
-    [Test]
-    public void TestVector2I_HashCode() {
-        // Arrange
-        var v1 = new Vector2I(1, 2);
-        var v2 = new Vector2I(1, 2);
-        var v3 = new Vector2I(3, 4);
-
-        // Act & Assert
-        Assert.Multiple(() => {
-            Assert.That(v1.GetHashCode(), Is.EqualTo(v2.GetHashCode()));
-            Assert.That(v1.GetHashCode(), Is.Not.EqualTo(v3.GetHashCode()));
-        });
-    }
-
-    [Test]
-    public void TestVector2I_BoundaryValues() {
-        // Arrange
-        var v1 = new Vector2I(0, 0);
-        var v2 = new Vector2I(-1, -2);
-        var v3 = new Vector2I(int.MaxValue, int.MaxValue);
-        var v4 = new Vector2I(int.MinValue, int.MinValue);
-
-        // Act
-        var v5 = v1 + v2;
-        var v6 = v1 - v2;
-        var v7 = v1 * v2;
-        var v8 = v3 + v4;
-        var v9 = v3 - v4;
-        var v10 = v3 * v4;
-
-        // Assert
-        Assert.Multiple(() => {
-            Assert.That(v5, Is.EqualTo(new Vector2I(-1, -2)));
-            Assert.That(v6, Is.EqualTo(new Vector2I(1, 2)));
-            Assert.That(v7, Is.EqualTo(new Vector2I(0, 0)));
-
-            Assert.That(v8, Is.EqualTo(new Vector2I(-1, -1)));
-            // Assert.That(v9, Is.EqualTo(new Vector2I(2 * int.MaxValue - 1, 2 * int.MaxValue - 1)));
-            // Assert.That(v10, Is.EqualTo(new Vector2I(int.MaxValue * int.MinValue, int.MaxValue * int.MinValue)));
-        });
-    }
-}
-
-public class TestsTrans2DI {
-    [SetUp]
-    public void Setup() {
-    }
-
-    [Test]
-    public void Test1() {
-        Assert.Pass();
-    }
-
-    [Test]
-    public void TestVector2I_Constructors() {
-        // Arrange & Act
-        var v1 = new Vector2I();
-        var v2 = new Vector2I(1, 2);
-        var v3 = new Vector2I(v2);
-
-        // Assert
-        Assert.That(v1.X, Is.EqualTo(0));
-        Assert.That(v1.Y, Is.EqualTo(0));
-        Assert.That(v2.X, Is.EqualTo(1));
-        Assert.That(v2.Y, Is.EqualTo(2));
-        Assert.That(v3.X, Is.EqualTo(1));
-        Assert.That(v3.Y, Is.EqualTo(2));
-    }
-
-    [Test]
-    public void TestVector2I_Operators() {
-        // Arrange
-        var v1 = new Vector2I(1, 2);
-        var v2 = new Vector2I(3, 4);
-
-        // Act
-        var v3 = v1 + v2;
-        var v4 = v1 - v2;
-        var v5 = v1 * v2;
-
-        // Assert
-        Assert.That(v3, Is.EqualTo(new Vector2I(4, 6)));
-        Assert.That(v4, Is.EqualTo(new Vector2I(-2, -2)));
-        Assert.That(v5, Is.EqualTo(new Vector2I(3, 8)));
-    }
-
-    [Test]
-    public void TestTrans2DI_Constructors() {
-        // Arrange & Act
-        var t1 = new Trans2DI();
-        var t2 = new Trans2DI(new Vector2I(1, 0), new Vector2I(0, 1), new Vector2I(0, 0));
-        var t3 = new Trans2DI(t2);
-        var t4 = new Trans2DI(1, 0, 0, 1, 0, 0);
-
-        // Assert
-        Assert.That(t1.XAxis, Is.EqualTo(new Vector2I(1, 0)));
-        Assert.That(t1.YAxis, Is.EqualTo(new Vector2I(0, 1)));
-        Assert.That(t1.Origin, Is.EqualTo(new Vector2I(0, 0)));
-
-        Assert.That(t2.XAxis, Is.EqualTo(new Vector2I(1, 0)));
-        Assert.That(t2.YAxis, Is.EqualTo(new Vector2I(0, 1)));
-        Assert.That(t2.Origin, Is.EqualTo(new Vector2I(0, 0)));
-
-        Assert.That(t3.XAxis, Is.EqualTo(new Vector2I(1, 0)));
-        Assert.That(t3.YAxis, Is.EqualTo(new Vector2I(0, 1)));
-        Assert.That(t3.Origin, Is.EqualTo(new Vector2I(0, 0)));
-
-        Assert.That(t4.XAxis, Is.EqualTo(new Vector2I(1, 0)));
-        Assert.That(t4.YAxis, Is.EqualTo(new Vector2I(0, 1)));
-        Assert.That(t4.Origin, Is.EqualTo(new Vector2I(0, 0)));
-    }
-
-    [Test]
-    public void TestTrans2DI_Operators() {
-        // Arrange
-        var t1 = new Trans2DI(new Vector2I(1, 0), new Vector2I(0, 1), new Vector2I(1, 2));
-        var v1 = new Vector2I(3, 4);
-
-        // Act
-        var v2 = t1 * v1;
-        var v3 = v1 * t1;
-
-        // Assert
-        Assert.That(v2, Is.EqualTo(new Vector2I(4, 6)));
-        Assert.That(v3, Is.EqualTo(new Vector2I(2, 2)));
-    }
-
-    [Test]
-    public void TestTrans2DI_BoundaryValues() {
-        // Arrange
-        var t1 = new Trans2DI(new Vector2I(int.MaxValue, 0), new Vector2I(0, int.MaxValue), new Vector2I(0, 0));
-        var t2 = new Trans2DI(new Vector2I(int.MinValue, 0), new Vector2I(0, int.MinValue), new Vector2I(0, 0));
-        var v1 = new Vector2I(1, 1);
-
-        // Act
-        var v2 = t1 * v1;
-        var v3 = t2 * v1;
-
-        // Assert
-        Assert.That(v2, Is.EqualTo(new Vector2I(int.MaxValue, int.MaxValue)));
-        Assert.That(v3, Is.EqualTo(new Vector2I(int.MinValue, int.MinValue)));
-    }
-
-    [Test]
-    public void TestTrans2DI_SpecialValues() {
-        // Arrange
-        var t1 = new Trans2DI(new Vector2I(0, 0), new Vector2I(0, 0), new Vector2I(0, 0));
-        var t2 = new Trans2DI(new Vector2I(1, 0), new Vector2I(0, 1), new Vector2I(0, 0));
-        var v1 = new Vector2I(1, 1);
-
-        // Act
-        var v2 = t1 * v1;
-        var v3 = t2 * v1;
-
-        // Assert
-        Assert.That(v2, Is.EqualTo(new Vector2I(0, 0)));
-        Assert.That(v3, Is.EqualTo(new Vector2I(1, 1)));
-    }
-
-    [Test]
-    public void TestTrans2DI_Multiplication() {
-        // Arrange
-        var t1 = new Trans2DI(new Vector2I(1, 0), new Vector2I(0, 1), new Vector2I(1, 2));
-        var t2 = new Trans2DI(new Vector2I(2, 0), new Vector2I(0, 2), new Vector2I(3, 4));
-
-        // Act
-        var t3 = t1 * t2;
-
-        // Assert
-        Assert.That(t3.XAxis, Is.EqualTo(new Vector2I(2, 0)));
-        Assert.That(t3.YAxis, Is.EqualTo(new Vector2I(0, 2)));
-        Assert.That(t3.Origin, Is.EqualTo(new Vector2I(5, 8)));
-    }
-}

project.godot

@@ -10,11 +10,10 @@ config_version=5
 
 [application]
 
-config/name="ChessGame"
+config/name="Chinese_Chess"
-config/version="0.0.5"
 run/main_scene="res://Main.tscn"
 config/features=PackedStringArray("4.3", "C#", "Mobile")
-config/icon="res://Asserts/icon.svg"
+config/icon="res://icon.svg"
 
 [autoload]
 
@@ -29,12 +28,7 @@ window/handheld/orientation=1
 
 [dotnet]
 
-project/assembly_name="ChessGame"
+project/assembly_name="Chinese_Chess"
-
-[navigation]
-
-2d/name_localized={}
-2d/version="0.0."
 
 [rendering]