init basic signal player chinese chess game

Scripts/Entities/ChessBoard.cs

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+// Chessboard.cs
+using Godot;
+
+public partial class ChessBoard : Node2D {
+	VirtualBoard Board = null;
+	MoveRecords Records = null;
+	// Called when the node enters the scene tree for the first time.
+	public Vector2 selectedNodePos = Vector2.Inf;
+	public override void _Ready() {
+		Board = new VirtualBoard(this as Node);
+		Records = new MoveRecords(onUndoRecordCallback: (newNode, oldNode, newPos, oldPos) => {
+			GD.Print("Undo: ", newNode, "->", newNode, ":", newPos, "->", oldPos);
+			ChessPiece newPiece = newNode as ChessPiece;
+			ChessPiece oldPiece = oldNode as ChessPiece;
+			Board.MoveNode(oldPos, newPos);
+			if (newPiece != null) {
+				Board.InsertNode(newPiece, newPos);
+			}
+			// if (oldPiece != null) {
+			// 	Board.RemoveNode(oldPos);
+			// }
+		});
+		Board.InitChessBoard();
+		// this.AddChild();
+	}
+
+	public override void _Input(InputEvent @event) {
+		if (@event is InputEventMouseButton mouseEvent &&
+			mouseEvent.Pressed &&
+			mouseEvent.ButtonIndex == MouseButton.Left) {
+			// HandleMouseClick(GetGlobalTransformWithCanvas().AffineInverse() * mouseButton.Position);
+			// HandleMouseClick(GetLocalMousePosition());
+			ActionPos(
+				(PosTrans.transArrToPix.AffineInverse() *
+				GetLocalMousePosition()).Round()
+			);
+		}
+	}
+
+	public void ActionPos(Vector2 clickArrPos) {
+		if (VirtualBoard.ArrPosOutOfRange(clickArrPos)) return;
+		GD.Print($"{clickArrPos} mouse clicked");
+		ChessPiece NowChess = Board.getNodeFromBoard(clickArrPos) as ChessPiece;
+        ChessPiece SelChess = Board.getNodeFromBoard(selectedNodePos) as ChessPiece;
+
+        if (Vector2.Inf.Equals(selectedNodePos)) {
+			if (NowChess == null) {
+				return;
+			}
+			NowChess.Selected();
+            GD.Print($"{clickArrPos} is selected");
+            selectedNodePos = clickArrPos;
+        } else if (selectedNodePos == clickArrPos) {
+			if (SelChess != null) {
+				SelChess.DeSelected();
+			}
+            GD.Print($"{selectedNodePos} is deselected");
+            selectedNodePos = Vector2.Inf;
+        } else {
+			GD.Print($"{selectedNodePos} move to {clickArrPos}");
+			if (SelChess != null) {
+				SelChess.DeSelected();
+            	GD.Print($"{selectedNodePos} is deselected");
+			}
+			Node NowNode;
+            if (NowChess != null) {
+				NowNode = NowChess.Duplicate();
+                Board.RemoveNode(clickArrPos);
+            } else {
+				NowNode = NowChess as Node;
+			}
+			Records.AddRecord(NowNode, SelChess, clickArrPos, selectedNodePos);
+            Board.MoveNode(clickArrPos, selectedNodePos);
+            selectedNodePos = Vector2.Inf;
+			// GD.Print($"End: {selectedNodePos} {SelChess} move to {clickArrPos} {NowChess}");
+        }
+    }
+
+	public void undo() {
+		Records.Undo();
+	}
+
+	public void redo() {
+		Records.Clear();
+		Board.Clear();
+		Board.InitChessBoard();
+	}
+
+	private void HandleMouseClick(Vector2 clickPosition) {
+
+		// 如果有棋子被选中，则进行后续操作
+		// if (nowSelectedChess == null) {
+		// 	seletedNode = null;
+		// } else if (nowSelectedChess != null && seletedNode != null) {
+		// 	if (seletedNode is ChessPiece chessPiece) MoveChess(arrayPos, chessPiece.arrPos);
+		// }
+	}
+
+	
+}

Scripts/Entities/ChessPiece.cs

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+// Chesspiece.cs
+using Godot;
+
+public partial class ChessPiece : Sprite2D {
+    // 文字内容
+    [Export]
+    public string PieceLabel { get; set; } = null;
+    // 文字颜色（可导出以编辑器调整）
+    [Export]
+    public Color LabelColor { get; set; } = new Color("black");
+    private Vector2 textureSize;
+
+    private Label labelOfChessName;
+
+    private Vector2 arrPos = new Vector2(); // 注意这个坐标的非像素坐标而是棋盘坐标
+
+    public void movePos(Vector2 newPos) {
+        this.arrPos = newPos;
+        this.Position = PosTrans.transArrToPix * newPos;
+    }
+
+    public Vector2 getPos() {
+      return arrPos;
+    }
+
+    // 是否被选中
+    public bool isSelected = false;
+    Transform2D transToSeleted = new Transform2D(
+		new Vector2(1.2f, 0),
+		new Vector2(0, 1.2f),
+		new Vector2(0, 0)
+	);
+
+    public void Selected() {
+        if (isSelected) {
+            return;
+        }
+        this.Transform *= transToSeleted;
+        this.isSelected = true;
+    }
+
+    public void DeSelected() {
+        if (!isSelected) {
+            return;
+        }
+        this.Transform *= transToSeleted.AffineInverse();
+        this.isSelected = false;
+    }
+
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready() {
+        InitLabel();
+	}
+
+    private void InitLabel() {
+        // this.Texture.ResourcePath = "res://Asserts/ChesspieceBase.tres";
+        this.Texture = (Texture2D)ResourceLoader.Load("res://Asserts/ChesspieceBase.tres");
+        textureSize = this.Texture.GetSize();
+        Vector2 labalPosition = new(
+                -textureSize.X / 2,
+                -textureSize.Y / 2);
+        labelOfChessName = new Label {
+            Text = PieceLabel,
+            HorizontalAlignment = HorizontalAlignment.Center,
+            VerticalAlignment = VerticalAlignment.Center,
+            Modulate = LabelColor,
+            Position = labalPosition,
+            Size = textureSize,
+        };
+        // labelOfChessName.SetAnchorsPreset(Control.LayoutPreset.FullRect);
+        AddChild(labelOfChessName);
+    }
+
+    interface IVarify {
+        bool CanMove(Vector2 newPosition);
+    }
+}

Scripts/Entities/ChessPieces/ChessTypes.cs

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+// 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