class TestObject{public:    // there is no reason to take pointers to the mesh and effect you should    // use references as a safer more user friendly version (no need for users    // of the class to take the address of the object the class can take a     // reference then take the address of the reference if it needs to store a pointer     TestObject(AEngine::Mesh& mesh, AEngine::Effect& effect,                D3DXVector3 position, D3DXVector3 rotation, D3DXVector3 scale):    // in C++ you should use initializer lists to initialize things in constructors    mPosition(position), // calls mPositions constructor with position as an argument    mRotation(rotation), // ...    mScale(scale), // ...    // calls mRenderObjects constructor with the given arguments    // mRender Objects ctor should be changed to take mesh, effect and arguable      // mPosition, mRotation, and mScale by reference then take the address    // when it stores the pointer    mRenderObject(mesh, effect, mPostition, mRotation, mScale)    {    }    // copy constructor takes const ref to object and makes a copy    friend TestObject(const TestObject& rhs):    mPosition(rhs.mPosition),    mRotation(rhs.mRotation),    mScale(scale),    // pass variables of this object so references are to the new object     // instead of the old    mRenderObject(rhs.mRenderObject.Mesh(), rhs.mRenderObject.Effect(), mPostition, mRotation, mScale)    {    }    friend TestObject& operator=(const TestObject& rhs)    {        // same type of thing as copy ctor        return *this // to allow for TestObject1 = TestObject2 = TestObject3    }    ~TestObject(void)     {     }    void Update()     {        // Just something to Test if mRenderObject is in-sync         mRotation.x += 0.001f;        mRotation.y += 0.001f;        mRotation.z += 0.001f;    }        void Render()    {        mRenderObject.Render();    }private:    D3DXVector3                 mPosition;    D3DXVector3                 mRotation;    D3DXVector3                 mScale;    AEngine::RenderableObject   mRenderObject;};