The compiler does not know that externalFunc doesn't change the pointer o. It knows that id couldn't change in the o it has, but o itself could change.

I have the following code: class Base { public: Base() :id(2) { } protected: int id; }; class Derived : public Base { public: void print() { Base b; cout << b.id << endl; } }; the error is: protected member "Base.id" is not accessible through a "Base" pointer or object

I'm looking to create some procedural low poly rocks and boulders for a game. I haven't found much interesting information on the internet other than 3D software articles. Not sure what way to go.