地图组件和ECS框架完成

lib/ecs/entity.dart

@@ -0,0 +1,39 @@
+import 'component.dart';
+/// 实体ID生成器
+class EntityIdGenerator {
+  static int _id = 0;
+  static int nextId() => _id++;
+}
+
+/// 实体类 - 代表地图上的一个对象
+class Entity {
+  final int id;
+  final String name;
+  int entityType;
+  final Map<String, Component> _components = {};
+
+  Entity({int? id, required this.name, this.entityType = 0}) : id = id ?? EntityIdGenerator.nextId();
+
+  /// 添加组件
+  void addComponent<T extends Component>(T component) {
+    _components[T.toString()] = component;
+  }
+
+  /// 获取组件
+  T? getComponent<T extends Component>() {
+    return _components[T.toString()] as T?;
+  }
+
+  /// 检查是否有特定类型的组件
+  bool hasComponent<T extends Component>() {
+    return _components.containsKey(T.toString());
+  }
+
+  /// 移除组件
+  void removeComponent<T extends Component>() {
+    _components.remove(T.toString());
+  }
+
+  /// 获取所有组件
+  Map<String, Component> get components => _components;
+}