init framework

source/src/ECS/Transform.ts

@@ -0,0 +1,42 @@
+class Transform {
+    /** 相关联的实体 */
+    public readonly entity: Entity;
+    private _children: Transform[];
+    private _parent: Transform;
+
+    public get childCount(){
+        return this._children.length;
+    }
+
+    constructor(entity: Entity){
+        this.entity = entity;
+        this._children = [];
+    }
+
+    public getChild(index: number){
+        return this._children[index];
+    }
+
+    public get parent(){
+        return this._parent;
+    }
+
+    public set parent(value: Transform){
+        this.setParent(value);
+    }
+
+    public setParent(parent: Transform){
+        if (this._parent == parent)
+            return this;
+
+        if (this._parent)
+            this._parent._children.remove(this);
+
+        if (parent)
+            parent._children.push(this);
+
+        this._parent = parent;
+
+        return this;
+    }
+}