新增基础实体系统

source/src/ECS/Systems/EntitySystem.ts

@@ -0,0 +1,52 @@
+class EntitySystem {
+    private _scene: Scene;
+    private _entities: Entity[] = [];
+    private _matcher: Matcher;
+
+    public get matcher(){
+        return this._matcher;
+    }
+
+    public get scene(){
+        return this._scene;
+    }
+
+    public set scene(value: Scene){
+        this._scene = value;
+        this._entities = [];
+    }
+
+    constructor(matcher?: Matcher){
+        this._matcher = matcher ? matcher : Matcher.empty();
+    }
+
+    public initialize(){
+        
+    }
+
+    public update(){
+        this.begin();
+        this.process(this._entities);
+    }
+
+    public lateUpdate(){
+        this.lateProcess(this._entities);
+        this.end();
+    }
+
+    protected begin(){
+
+    }
+
+    protected process(entities: Entity[]){
+
+    }
+
+    protected lateProcess(entities: Entity[]){
+
+    }
+
+    protected end(){
+
+    }
+}