实现了由Component实现的自我复制，而无需关心具体的Component派生类.

inc/hgl/component/Component.h

@@ -50,6 +50,8 @@ public:
 
     ComponentData()=default;
     virtual ~ComponentData()=default;
+
+    virtual ComponentData *Duplication()=0;
 };
 
 /**
@@ -94,7 +96,7 @@ public:
 
 public:
 
-    virtual Component *Duplication()=0;
+    virtual Component *Duplication();
 
     //virtual void Update(const double delta_time)=0;
 

inc/hgl/component/MeshComponent.h

@@ -22,6 +22,11 @@ public:
     }
 
     virtual ~MeshComponentData();
+
+    ComponentData *Duplication() override
+    {
+        return(new MeshComponentData(mesh));
+    }
 };//struct MeshComponentData
 
 class MeshComponent;
@@ -75,19 +80,6 @@ public:
     const   MeshComponentData &GetData()const {return *sm_data;}
 
     Mesh *GetMesh() const{return sm_data->mesh;}
-
-public:
-
-    virtual Component *Duplication() override
-    {
-        MeshComponentManager *manager=GetManager();
-
-        MeshComponent *mc=manager->CreateComponent(sm_data->mesh);
-
-        mc->SetLocalMatrix(GetLocalMatrix());
-
-        return mc;
-    }
 };//class MeshComponent
 
 COMPONENT_NAMESPACE_END

inc/hgl/component/SceneComponent.h

@@ -15,6 +15,17 @@ public:
 
     using Component::Component;
     virtual ~SceneComponent()=default;
+
+    virtual Component *Duplication() override
+    {
+        SceneComponent *sc=(SceneComponent *)Component::Duplication();
+
+        if(!sc)
+            return(sc);
+
+        sc->SetLocalMatrix(GetLocalMatrix());
+        return sc;
+    }
 };//class SceneComponent
 
 COMPONENT_NAMESPACE_END